Casting forming equipment for gear of speed reducer

Abstract

The invention discloses speed reducer gear casting forming equipment, and relates to the technical field of gear casting. The speed reducer gear casting forming equipment comprises an upper die, a lower die, a circular groove, a first tooth groove, a first circular block, a second circular block, a forming ring, a first sealing clamping piece, a second tooth groove, a second sealing clamping piece, a first forming groove and a second forming groove. Through the up-down moving design of the forming ring, forming and rapid demolding of gears of different sizes are achieved, when the forming ring moves upwards to be aligned with the top of the lower mold, a first forming groove suitable for the small-size gear is formed, and when the forming ring moves downwards to be aligned with the top of the first circular block, a second forming groove suitable for the large-size gear is formed; by means of the design, customization of a large number of molds is avoided, the manufacturing cost and the storage management cost are reduced, the mold replacement frequency is reduced, the production efficiency is improved, meanwhile, rapid demolding of the gear is facilitated through vertical movement of the forming ring, and the practicability and flexibility of equipment are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gear casting, and particularly relates to a casting and forming device for a reducer gear. Background Art

[0002] In the field of mechanical manufacturing, as an important transmission device, the reducer is widely used in various industrial equipment. As the core component of the reducer, the manufacturing precision and quality of the gear directly affect the performance and service life of the reducer. Therefore, in order to manufacture gears with complex shapes and precise dimensions, casting and forming equipment is required.

[0003] However, in the actual production process, the sizes of reducer gears are diverse. Most of the existing casting and forming devices for reducer gears adopt a fixed-size design. This design method can only form gears of specific sizes. Once gears of smaller or larger sizes need to be produced, the molds must be customized again. This not only significantly increases the manufacturing cost and storage management cost of the molds, but also significantly reduces the production efficiency due to frequent mold replacement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a casting and forming device for a reducer gear that can overcome or at least partially solve the above problems.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is: a casting and forming device for a reducer gear, including an upper mold and a lower mold. A pouring assembly is provided on the upper mold. A circular groove corresponding to the pouring assembly is provided at the top of the lower mold. A plurality of first tooth grooves distributed in a circumferential manner are provided on the inner wall of the circular groove. It also includes a first circular block fixedly connected to the center of the bottom wall of the circular groove. A second circular block is fixedly connected to the center of the top of the first circular block. A forming ring is slidably connected between the first circular block and the inner wall of the circular groove. A first sealing card that fits against the inner wall of the first tooth groove is fixedly connected to the outer surface of the forming ring. A plurality of second tooth grooves distributed in a circumferential manner are provided on the inner surface of the forming ring. A second sealing card that fits against the inner wall of the second tooth groove is fixedly connected to the surface of the first circular block. When the forming ring moves upward to align with the top of the lower mold, a first forming groove is formed in the circular groove. When the forming ring moves downward to align with the top of the first circular block, a second forming groove is formed in the circular groove.

[0006] Preferably, the pouring assembly includes a pouring port provided on the top of the upper mold, and a plurality of diversion channels distributed in a circumferential manner are communicated between the pouring port and the bottom of the upper mold.

[0007] Preferably, a plurality of vertical positioning rods are fixedly connected to the top of the lower mold, plug-in holes corresponding to the vertical positioning rods are provided between the top and bottom of the lower mold, and locking blocks are threadedly connected to the surfaces of the vertical positioning rods.

[0008] Preferably, the axial thickness of the first circular block, the second circular block and the forming ring are each half of the depth of the circular groove, and the surface diameter of the first circular block is greater than the surface diameter of the second circular block.

[0009] Preferably, a plurality of circumferentially distributed moving rods are fixedly connected to the bottom of the forming ring, one end of the moving rod that passes through the bottom of the lower mold is fixedly connected to a toggle plate, the surface of the moving rod is sleeved with a limit spring fixedly connected between the top of the toggle plate and the bottom of the lower mold, a semicircular resistance block is fixedly connected to the top center of the toggle plate, and the surface of the semicircular resistance block is linked to a toggle mechanism installed on the bottom of the lower mold.

[0010] Preferably, a plurality of vertical support frames are fixedly connected to the bottom of the lower mold, and a bottom plate is fixedly connected to the bottom of the vertical support frames.

[0011] Preferably, the toggle mechanism includes a pair of vertical mounting plates fixedly connected to the bottom of the lower mold, a connecting shaft is rotatably arranged between the two vertical mounting plates, a driving part connected to one section of the connecting shaft is installed on one of the vertical mounting plates, and a lifting part that fits the surface of the semicircular interference block is fixedly connected to the connecting shaft.

[0012] Preferably, the lifting portion comprises a circular toggle block fixedly connected to the connecting shaft, and an arc-shaped toggle plate is fixedly connected to the circular toggle block.

[0013] Preferably, when the arc-shaped shift plate contacts the surface of the semicircular resistance block, the bottom of the forming ring fits tightly against the bottom wall of the circular groove; when the arc-shaped shift plate disengages from the surface of the semicircular resistance block so that the circular shift block contacts the surface of the semicircular resistance block, a limiting component is provided on the top of the shift plate which is engaged with the surface of the arc-shaped shift plate.

[0014] Preferably, the limiting assembly comprises an arc-shaped limiting plate fixedly connected to the top of the shifting plate, and one side of the arc-shaped limiting plate is provided with an arc-shaped slot that is engaged with the surface of the arc-shaped shifting plate.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] When the forming ring moves upward and aligns with the top of the lower die, a first forming groove will be formed in the circular groove, which can meet the forming requirements of small-sized gears. When large-sized gears need to be formed, only need to move the forming ring downward to align it with the top of the first circular block. At this time, a second forming groove suitable for large-sized gears will be formed in the circular groove. Through this design, there is no need to customize a large number of different molds for gears of different sizes, thus significantly reducing the manufacturing cost and storage management cost of the molds. At the same time, this design also reduces the frequency of mold replacement and improves production efficiency, enabling the gear casting and forming equipment of this reducer to better adapt to the diverse gear size requirements in actual production;

[0017] In addition, when the gear formed in the first forming groove needs to be demolded, the forming ring moves downward from the top position of the lower die to align with the top position of the first circular block. At this time, the gear formed in the first forming groove is no longer restricted by the forming ring and can be quickly taken out. For the gear formed in the second forming groove, the top of the forming ring was originally aligned with the top of the first circular block. During demolding, the forming ring moves upward, which can eject the gear formed in the second forming groove from the circular groove, thus realizing quick demolding. Therefore, through the upward and downward movement design of the forming ring, this equipment is not only suitable for the forming of gears of different sizes, but also greatly facilitates the quick demolding operation of formed gears of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings:

[0019] Figure 1 is a schematic cross-sectional structure diagram of a gear casting and forming equipment for a reducer proposed by the present invention Figure 1 ;

[0020] Figure 2 is a schematic cross-sectional structure diagram of a gear casting and forming equipment for a reducer proposed by the present invention Figure 2 ;

[0021] Figure 3 is the present invention Figure 2 is a schematic exploded view of the connection between the upper die and the lower die in the present invention;

[0022] Figure 4 is the present invention Figure 3 is a schematic exploded view of the connection between the forming ring and the circular groove in the present invention;

[0023] Figure 5 is the present invention Figure 1 is a schematic diagram of a partially enlarged structure at position A in the present invention;

[0024] Figure 6 is the present invention Figure 2 is a schematic diagram of a partially enlarged structure at position B in the present invention;

[0025] Figure 7 For the present invention Figure 4 Schematic diagram of the first connection structure between the forming ring and the circular groove in the present invention;

[0026] Figure 8 For the present invention Figure 4 Schematic diagram of the second connection structure between the forming ring and the circular groove in the present invention;

[0027] Figure 9 Schematic diagram of the overall structure of a gear casting and forming device for a speed reducer proposed by the present invention.

[0028] In the figure: 1. Upper die; 11. Pouring port; 12. Diversion channel; 13. Insertion hole; 2. Lower die; 21. Circular groove; 22. First tooth groove; 23. Positioning vertical rod; 24. Locking block; 3. First circular block; 4. Second circular block; 5. Forming ring; 51. First sealing card; 52. Second tooth groove; 53. Second sealing card; 54. First forming groove; 55. Second forming groove; 56. Moving rod; 57. Dialing plate; 58. Limiting spring; 59. Semi-circular abutting block; 510. Vertical mounting plate; 511. Connecting shaft; 512. Driving part; 513. Circular dialing block; 514. Arc-shaped dialing plate; 515. Arc-shaped limiting plate; 516. Arc-shaped clamping groove; 6. Vertical support frame; 61. Bottom plate. Detailed implementation manners

[0029] The following further elaborates on the present invention in conjunction with the drawings and embodiments, enabling those skilled in the art to implement it with reference to the description in the specification.

[0030] It should be understood that terms such as "having", "including", and "comprising" as used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0031] In the description of the present invention, the orientation or positional relationships indicated by terms such as "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0032] Embodiment 1: Refer to Figures 1 - 4 and Figure 9, A reducer gear casting and forming device, including an upper mold 1 and a lower mold 2. There is a pouring component on the upper mold 1. The pouring component includes a pouring port 11 opened on the top of the upper mold 1. There are a plurality of diversion channels 12 distributed in a circle and communicated between the pouring port 11 and the bottom of the upper mold 1. The top of the lower mold 2 is provided with a circular groove 21 corresponding to the diversion channels 12. The inner wall of the circular groove 21 is provided with a plurality of first tooth grooves 22 distributed in a circle. The top of the lower mold 2 is fixedly connected with a plurality of positioning vertical rods 23. A plug hole 13 corresponding to the positioning vertical rods 23 is opened between the top and the bottom of the lower mold 2. A locking block 24 is threadedly connected to the surface of the positioning vertical rod 23.

[0033] When the above technical solution is used, first, slide the upper mold 1 along the surface of the positioning vertical rod 23 through the plug hole 13 until the upper mold 1 fits on the top of the lower mold 2. Then, threadedly rotate the locking block 24 from the top end of the positioning vertical rod 23 to firmly fix the upper mold 1 on the top of the lower mold 2. After that, pour the processed molten metal from the pouring port 11. After the molten metal enters, through a plurality of diversion channels 12 distributed in a circle, it evenly flows into the circular groove 21 of the lower mold 2. Due to the reasonable design of the diversion channels 12, the molten metal can be evenly filled into the circular groove 21 and the first tooth grooves 22, ensuring that all parts of the casting can be fully filled with molten metal and avoiding defects such as insufficient pouring and cold shuts. After pouring, let the casting cool naturally in the mold. During the cooling process, the molten metal gradually solidifies and forms a reducer gear blank with a specific shape. When the casting is completely solidified, detach the upper mold 1 from the top of the lower mold 2, and then the casting can be taken out from the circular groove 21 of the lower mold 2.

[0034] It should be noted that the way the upper mold 1 firmly fits on the top of the lower mold 2 is not limited to the cooperation of the locking block 24 and the positioning vertical rod 23. It can also adopt an automatic way, such as installing cylinders on both sides or the top of the upper mold 1 to achieve firm fitting. Specifically, which way to choose can be determined according to the actual usage situation.

[0035] Example 2: Refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 7 and Figure 8, in actual production applications, the sizes of the reducer gears are diverse. Considering that if the circular groove 21 is designed with a fixed size, then this design method can only form gears of specific sizes. When it is necessary to produce smaller or larger-sized gears, different molds must be customized, which will not only further increase the manufacturing cost and storage management cost of the molds, but also significantly reduce the production efficiency due to frequent mold replacement. Based on this problem, improvements have been made on the basis of the above-mentioned Embodiment 1. The specific improvement lies in that it further includes a first circular block 3 fixedly connected to the center of the bottom wall of the circular groove 21. The top center of the first circular block 3 is fixedly connected with a second circular block 4. A forming ring 5 is slidably connected between the outer surface of the first circular block 3 and the inner wall of the circular groove 21. The outer surface of the forming ring 5 is fixedly connected with a first sealing card 51 that fits against the inner wall of the first tooth groove 22. A plurality of second tooth grooves 52 distributed in a circumferential manner are formed on the inner surface of the forming ring 5. The surface of the first circular block 3 is fixedly connected with a second sealing card 53 that fits against the inner wall of the second tooth groove 52. When it is necessary to form a small-sized gear, the operator only needs to move the forming ring 5 upward to align with the top of the lower mold 2. At this time, a first forming groove 54 is formed in the circular groove 21. The size of the first forming groove 54 is small and can meet the forming requirements of small-sized gears. When it is necessary to form a large-sized gear, move the forming ring 5 downward to align with the top of the first circular block 3, and a second forming groove 55 will be formed in the circular groove 21. The size of the second forming groove 55 is large and is suitable for the forming of large-sized gears. In this way, there is no need to customize a large number of different molds for gears of different sizes, greatly reducing the manufacturing cost and storage management cost of the molds. At the same time, the frequency of mold replacement is reduced, and the production efficiency is improved, enabling the reducer gear casting and forming equipment to better adapt to the diverse gear size requirements in actual production.

[0036] It should be particularly noted that the axial thicknesses of the first circular block 3, the second circular block 4, and the forming ring 5 are all equal, and the axial thicknesses of the first circular block 3, the second circular block 4, and the forming ring 5 are each half of the depth of the circular groove 21. The advantage of this design is that, on the one hand, when the forming ring 5 moves upward to align with the top of the lower mold 2, the first sealing card 51 on the outer surface of the forming ring 5 exactly coincides with the upper half position of the first tooth groove 22, and at the same time, the second tooth groove 52 coincides with the top of the second sealing card 53. In this way, the specific position of the first forming groove 54 for forming small-sized gears can be clearly defined. When the forming ring 5 moves downward to align with the top of the first circular block 3, the position of the second forming groove 55 for forming large-sized gears can be accurately formed. This precise positioning makes the operation simple and accurate when switching between the forming of gears of different sizes, improving the production accuracy.

[0037] On the other hand, this design makes full use of the depth space of the circular groove 21, which not only provides sufficient space for forming the first molding groove 54 and the second molding groove 55 of different sizes, but also avoids the overall mold being too large. This not only saves the manufacturing materials of the mold, but also effectively reduces the manufacturing cost of the mold, and improves the economy and practicality of the equipment.

[0038] At the same time, in order to realize the switching of the forming ring 5 in the circular groove 21 to form the first forming groove 54 and the second forming groove 55 in the above technical solution, a plurality of moving rods 56 distributed in a circumference are fixedly connected to the bottom of the forming ring 5, and one end of the moving rod 56 that penetrates the bottom of the lower mold 2 is fixedly connected to a toggle plate 57, and the surface of the moving rod 56 is sleeved with a limit spring 58 fixedly connected between the top of the toggle plate 57 and the bottom of the lower mold 2, and the top center of the toggle plate 57 is fixedly connected to a semicircular resistance block 59, and the surface of the semicircular resistance block 59 is linked to a spring installed on the lower mold 2, the toggle mechanism comprises a pair of vertical mounting plates 510 fixedly connected to the bottom of the lower mold 2, a connecting shaft 511 is rotatably arranged between the two vertical mounting plates 510, a driving part 512 connected to one section of the connecting shaft 511 is installed on one of the vertical mounting plates 510, a lifting part that fits the surface of the semicircular abutment block 59 is fixedly connected to the connecting shaft 511, the lifting part comprises a circular toggle block 513 fixedly connected to the connecting shaft 511, and an arc-shaped toggle plate 514 is fixedly connected to the circular toggle block 513.

[0039] In the above technical solution, when the circular toggle block 513 contacts the semicircular abutment block 59, Figure 5 As shown, at this time, the first forming groove 54 is formed in the circular groove 21. If it is necessary to switch to the second forming groove 55, it is only necessary to start the driving part 512 using the servo motor to drive the connecting shaft 511 to rotate 180 degrees in the clockwise direction. During this process, the circular toggle block 513 gradually separates from the surface of the semicircular abutment block 59, and then the arc-shaped toggle plate 514 abuts against the surface of the semicircular abutment block 59, as shown in FIG. Figure 6As shown, due to the interference of the arc-shaped paddle plate 514, the paddle plate 57 will move downward from the position aligned with the top of the lower mold 2 to the position aligned with the top of the first circular block 3 through the forming ring 5 connected to the top of the moving rod 56 while stretching the limit spring 58, thereby switching the circular groove 21 to form the second forming groove 55. If it is necessary to switch to the first forming groove 54 again, continue to start the driving part 512 using the servo motor to drive the connecting shaft 511 to rotate one hundred and eighty degrees counterclockwise. During this process, the arc-shaped paddle plate 514 gradually separates from the surface of the semicircular interference block 59, and then the circular paddle block 513 contacts the surface of the semicircular interference block 59. At this time, the paddle plate 57 is reset under the elastic force of the limit spring 58, and the forming ring 5 connected to the top of the moving rod 56 is used to make it move upward from the position aligned with the top of the first circular block 3 to the position aligned with the top of the lower mold 2, so that the circular groove 21 can be switched to form the first forming groove 54.

[0040] It is worth mentioning that the upward and downward moving design of the molding ring 5 is not only suitable for the molding of gears of different sizes, but also facilitates the rapid demolding of gears of different sizes. For the gear molded in the first molding groove 54, when the molding ring 5 is in a position aligned with the top of the lower mold 2, the gear is molded under the restriction of the molding ring 5. When demolding is required, the molding ring 5 moves down from the top position of the lower mold 2 to be aligned with the top position of the first circular block 3. At this time, the gear molded in the first molding groove 54 is no longer restricted by the molding ring 5 and can be quickly taken out. For the gear molded in the second molding groove 55, the top of the molding ring 5 is originally aligned with the top of the first circular block 3. During demolding, the molding ring 5 moves upward, which can push the gear molded in the second molding groove 55 out of the circular groove 21, thereby achieving rapid demolding.

[0041] Furthermore, considering that the toggle plate 57 is located below the bottom of the lower mold 2, in order to provide a stable supporting space for the toggle plate 57 when in use, a plurality of vertical support frames 6 are fixedly connected to the bottom of the lower mold 2, and a bottom plate 61 is fixedly connected to the bottom of the vertical support frames 6. With the support of the bottom plate 61 and the vertical support frames 6, the lower mold 2 can be stably supported.

[0042] Example 3: Reference Figure 5 and Figure 6, considering the above embodiments, when the arc-shaped dial 514 contacts the surface of the semi-circular contact block 59, the bottom of the forming ring 5 is closely attached to the bottom wall of the circular groove 21. At this time, the forming ring 5 aligned with the top of the first circular block 3 is in a stable fixed state and will not move. When the arc-shaped dial 514 disengages from the surface of the semi-circular contact block 59 and the circular dial block 513 contacts the surface of the semi-circular contact block 59, although the forming ring 5 aligned with the top of the lower mold 2 is limited by the limiting spring 58, the forming ring 5 is not in a completely fixed state and is prone to movement. Such movement may reduce the quality of the formed gear in the first forming groove 54. Based on this problem, in this embodiment, a limiting component that is snap-connected to the surface of the arc-shaped dial 514 is provided on the top of the dialing plate 57. The limiting component includes an arc-shaped limiting plate 515 fixedly connected to the top of the dialing plate 57. An arc-shaped clamping groove 516 that is snap-connected to the surface of the arc-shaped dial 514 is formed on one side of the arc-shaped limiting plate 515. When the arc-shaped dial 514 gradually disengages from the surface of the semi-circular contact block 59 and the circular dial block 513 abuts against the semi-circular contact block 59, one side of the arc-shaped dial 514 will rotate and be snap-connected into the arc-shaped clamping groove 516. This snap-connection effect limits the downward movement of the forming ring 5, thereby ensuring that when the first forming groove 54 is formed, the forming ring 5 can maintain a stable fixed state and will not move.

[0043] In summary, through the design of the upward and downward movement of the forming ring 5, not only can the device adapt to the forming requirements of gears of different sizes, but also it greatly facilitates the rapid demolding operation of formed gears of different sizes. In addition, by further optimizing the stability of the forming ring 5 at specific positions, this design also significantly improves the quality of gear forming, thereby ensuring the reliability and efficiency of the entire casting and forming process.

[0044] The above are only preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content within the scope of the technical solution of the present invention to make equivalent embodiments with equivalent changes. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A reducer gear casting molding equipment, comprising: An upper mold (1) and a lower mold (2), wherein the upper mold (1) is provided with a casting assembly, and the top of the lower mold (2) is provided with a circular groove (21) corresponding to the casting assembly, and the inner wall of the circular groove (21) is provided with a plurality of first tooth grooves (22) distributed in a circumference; characterized in that it also includes: A first circular block (3) is fixedly connected to the center of the bottom wall of the circular groove (21); a second circular block (4) is fixedly connected to the center of the top of the first circular block (3); a forming ring (5) is slidably connected between the first circular block (3) and the inner wall of the circular groove (21); a first sealing card (51) is fixedly connected to the outer surface of the forming ring (5) and is in contact with the inner wall of the first tooth groove (22); a plurality of second tooth grooves (52) are formed on the inner surface of the forming ring (5); and a second sealing card (53) is fixedly connected to the surface of the first circular block (3) and is in contact with the inner wall of the second tooth groove (52); When the molding ring (5) moves upward to align with the top of the lower mold (2), a first molding groove (54) is formed in the circular groove (21); When the molding ring (5) moves downward to align with the top of the first circular block (3), a second molding groove (55) is formed in the circular groove (21).

2. The reducer gear casting molding equipment according to claim 1, characterized in that: The pouring assembly comprises a pouring port (11) opened on the top of the upper mold (1), and a plurality of circumferentially distributed flow guide channels (12) are connected between the pouring port (11) and the bottom of the upper mold (1).

3. The reducer gear casting molding equipment according to claim 2, characterized in that: A plurality of positioning vertical rods (23) are fixedly connected to the top of the lower mold (2), and plug holes (13) corresponding to the positioning vertical rods (23) are provided between the top and bottom of the lower mold (2), and locking blocks (24) are threadedly connected to the surfaces of the positioning vertical rods (23).

4. The reducer gear casting molding equipment according to claim 3, characterized in that: The axial thickness of the first circular block (3), the second circular block (4) and the forming ring (5) are each half the depth of the circular groove (21), and the surface diameter of the first circular block (3) is greater than the surface diameter of the second circular block (4).

5. The reducer gear casting molding equipment according to claim 4, characterized in that: The bottom of the forming ring (5) is fixedly connected to a plurality of circumferentially distributed moving rods (56); one end of the moving rod (56) extending through the bottom of the lower mold (2) is fixedly connected to a toggle plate (57); the surface of the moving rod (56) is sleeved with a limit spring (58) fixedly connected between the top of the toggle plate (57) and the bottom of the lower mold (2); the top center of the toggle plate (57) is fixedly connected to a semicircular abutment block (59); the surface of the semicircular abutment block (59) is linked to a toggle mechanism installed at the bottom of the lower mold (2).

6. The reducer gear casting molding equipment according to claim 5, characterized in that: A plurality of vertical support frames (6) are fixedly connected to the bottom of the lower mold (2), and a bottom plate (61) is fixedly connected to the bottom of the vertical support frames (6).

7. The reducer gear casting molding equipment according to claim 5, characterized in that: The toggle mechanism comprises a pair of vertical mounting plates (510) fixedly connected to the bottom of the lower mold (2), a connecting shaft (511) being rotatably arranged between the two vertical mounting plates (510), a driving portion (512) connected to a section of the connecting shaft (511) being installed on one of the vertical mounting plates (510), and a lifting portion which is in contact with the surface of the semicircular abutment block (59) being fixedly connected to the connecting shaft (511).

8. The reducer gear casting molding equipment according to claim 7, characterized in that: The lifting part comprises a circular toggle block (513) fixedly connected to the connecting shaft (511), and an arc-shaped toggle plate (514) is fixedly connected to the circular toggle block (513).

9. The reducer gear casting molding equipment according to claim 8, characterized in that: When the arc-shaped shifting plate (514) contacts the surface of the semicircular abutment block (59), the bottom of the forming ring (5) is tightly fitted on the bottom wall of the circular groove (21); when the arc-shaped shifting plate (514) is separated from the surface of the semicircular abutment block (59) so that the circular shifting block (513) contacts the surface of the semicircular abutment block (59), a limiting component is provided on the top of the shifting plate (57) and is engaged with the surface of the arc-shaped shifting plate (514).

10. The reducer gear casting molding equipment according to claim 9, characterized in that: The limiting assembly comprises an arc-shaped limiting plate (515) fixedly connected to the top of the shifting plate (57), and one side of the arc-shaped limiting plate (515) is provided with an arc-shaped slot (516) which is snap-fitted with the surface of the arc-shaped shifting plate (514).

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