Short arm transmission shell casting structure for coal mining machine

Abstract

The utility model provides a short arm transmission shell casting structure for a coal mining machine, which comprises a shell, a cutting motor hole, a transmission mechanism hole, a traction motor hole, a traction part two-stage planetary mechanism hole, a guide sliding shoe hole and a rack oil cylinder cavity, the cutting motor hole, the transmission mechanism hole, the traction motor hole and the traction part two-stage planetary mechanism hole are sequentially arranged on the first shell in parallel, the guide sliding shoe hole is located in the end face, away from the first shell, of the second shell, and the rack oil cylinder cavity penetrates through the second shell. The device further comprises a dead head and a dead head patch, the dead head is beneficial for reducing the shrinkage amount of the casting after solidification, and the dead head patch is beneficial for preventing crack defects.

Description

Technical Field

[0001] The utility model relates to a casting process, in particular to a casting structure of a short-arm transmission housing of a shearer. Background Art

[0002] Casting is a manufacturing process in which molten metal is poured into a mold and solidified by cooling to obtain parts with the required shape and properties. Due to the complex structure of the short-arm transmission housing of a shearer, casting defects such as porosity, shrinkage cavities, or cracks often occur in the hot spot areas during the casting process. These defects have a great impact on casting quality, casting accuracy, casting cost, and casting automation. At the same time, the casting sequence also has a great relationship with the tissue density of casting. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a casting structure for a short-arm transmission housing of a shearer that reduces internal structure defects and improves casting quality.

[0004] The present utility model provides a casting structure for a short-arm transmission housing of a shearer, which includes a housing, a cutting motor hole, a transmission mechanism hole, a traction motor hole, a traction unit double-stage planetary mechanism hole, a guide shoe hole, and a rack cylinder chamber. The housing includes a first housing and a second housing. The cutting motor hole, the transmission mechanism hole, the traction motor hole, and the traction unit double-stage planetary mechanism hole are arranged in parallel in sequence on the first housing. The guide shoe hole is located on the end face of the second housing away from the first housing, and the rack cylinder chamber penetrates through the second housing.

[0005] Further, the cutting motor hole, the transmission mechanism hole, the traction motor hole, or the traction unit double-stage planetary mechanism hole is a through hole, and the axes of the through holes are parallel to each other.

[0006] Further, it includes 2 guide shoe holes, which are respectively arranged on both sides of the end face of the second housing and close to both ends of the rack cylinder chamber.

[0007] Further, it also includes risers, which are respectively located inside the cutting motor hole, the rack cylinder chamber, the guide shoe hole, the traction motor hole, the traction unit double-stage planetary mechanism hole, or at the intersection of the first housing and the second housing.

[0008] Further, the bottom of the riser may also include a riser pad.

[0009] Further, the cross-section of the riser is circular or elliptical. The diameter range of the riser with a circular cross-section is 180 mm to 240 mm, the short-axis range of the riser with an elliptical cross-section is 200 mm to 260 mm, the long-axis range is 300 mm to 390 mm, and the height of the riser is 350 to 550 mm.

[0010] Further, the height range of the riser pad is 350 mm to 450 mm.

[0011] Further, the riser pad is located inside the cutting motor hole, or outside the traction motor hole and the double-stage planetary mechanism hole of the traction unit.

[0012] Further, it further includes a gating assembly, including an ingate, a runner and a sprue. The ingate and the runner are perpendicular to each other. One end of the ingate is connected to the runner or the sprue, and the other end is connected to the riser.

[0013] Further, the ratio of the cross-sectional areas of the sprue, the runner and the ingate is 1:1.2:1.5.

[0014] In summary, in this application, the position layouts of the cutting motor hole, the transmission mechanism hole, the traction motor hole, the double-stage planetary mechanism hole of the traction unit, the guide shoe hole and the rack cylinder chamber are reasonable; the riser helps to reduce the shrinkage of the casting after solidification, and can also overflow to collect some of the early cold and dirty molten steel. The riser pad is beneficial to prevent the generation of crack defects; the gating assembly of this application enables the molten steel to enter the cavity from bottom to top, reducing the impact force of the molten steel on the cavity and reducing defects such as sand inclusion and adhering sand caused by the impact of the molten steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shows the schematic casting structure of the short-arm transmission housing for a shearer of the present utility model Figure 1 .

[0016] Figure 2 Shows the schematic casting structure of the short-arm transmission housing for a shearer of the present utility model Figure 2 .

[0017] Figure 3 Shows the schematic casting structure of the short-arm transmission housing for a shearer of the present utility model Figure 3 .

[0018] DESCRIPTION OF REFERENCE NUMERALS

[0019] 100 - Schematic casting structure of the short-arm transmission housing for a shearer

[0020] 01 - Housing

[0021] 011 – First housing

[0022] 012 – Second housing

[0023] 02 - Cutting motor hole

[0024] 03 - Transmission mechanism hole

[0025] 04 - Traction motor hole

[0026] 05 - Double - stage planetary mechanism holes of the traction unit

[0027] 06 - Guide shoe holes

[0028] 07 - Rack oil cylinder chamber

[0029] 08 - Risers

[0030] 081 - First riser

[0031] 082 - Second riser

[0032] 083 - Third riser

[0033] 084 - Fourth riser

[0034] 09 – Riser padding

[0035] 010 - Chills

[0036] 200 – Pouring assembly

[0037] 201 - Inner runner

[0038] 202 - Cross runner

[0039] 203 - Sprue Detailed implementation manners

[0040] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0041] Please refer to Figures 1 to 3 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present utility model can implement.

[0042] The casting structure 100 of the short-arm transmission housing for a shearer includes a housing 01, a cutting motor hole 02, a transmission mechanism hole 03, a traction motor hole 04, a traction unit two-stage planetary mechanism hole 05, a guide shoe hole 06, and a rack cylinder chamber 07. Among them, the housing 01 includes a first housing 011 and a second housing 012. The cutting motor hole 02, the transmission mechanism hole 03, the traction motor hole 04, and the traction unit two-stage planetary mechanism hole 05 are arranged in parallel in sequence on the first housing 011. The cutting motor hole 02, the transmission mechanism hole 03, the traction motor hole 04, and the traction unit two-stage planetary mechanism hole 05 are all through holes, and the axes of the through holes are parallel to the y-axis. The guide shoe hole 06 is located on the end face of the second housing 012 away from the first housing 011. There are 2 guide shoe holes 06, which are respectively arranged on both sides of the end face of the second housing 012 and close to both ends of the rack cylinder chamber 07. The rack cylinder chamber 07 is a through hole that runs through the second housing 012 along the x-axis direction. Among them, the x-axis is the horizontal direction on the paper surface, the y-axis is the direction perpendicular to the x-axis on the paper surface, and the z-axis is the direction perpendicular to the paper surface.

[0043] One end of the through holes of the traction motor hole 04 and the traction unit two-stage planetary mechanism hole 05 is circular, and the other end is square.

[0044] This application also includes risers 08, which are used to reduce the shrinkage of the casting after solidification and can also overflow to collect some of the early cold and dirty molten steel. Specifically, the first riser 081 is located at the top of the cutting motor hole 02, the second riser 082 is located near the end of the rack cylinder chamber 07, the third riser 083 is located in the guide shoe hole 06, the fourth riser 084 is located outside the traction motor hole 04 or the traction unit two-stage planetary mechanism hole 05, and the fifth riser 085 is located at the intersection of the first housing 011 and the second housing.

[0045] Preferably, 2 or more first risers 081 are arranged at the top of the cutting motor hole 02, respectively located at the periphery of the top of the cutting motor hole 02. There are 2 second risers 082, respectively located near both ends of the rack cylinder chamber 07. There are 2 or more fourth risers 084, which are arranged in parallel in sequence outside the traction motor hole 04 or the traction unit two-stage planetary mechanism hole 05. There are 2 or more fifth risers 085, which are arranged in sequence at the intersection of the first housing 011 and the second housing 012.

[0046] The cross-section of the riser 08 can be circular or elliptical. A riser pad 09 can also be provided at the bottom of the riser 08. The riser pad 09 is a part that extends downward from the riser 08, increasing the volume of the riser without increasing the occupied space, which is beneficial to preventing crack defects from occurring inside the cutting motor hole 02, the rack oil cylinder chamber 07, the guide shoe hole 06, the traction motor hole 04, the double-stage planetary mechanism hole 05 of the traction unit, or at the intersection of the first housing 011 and the second housing. For the first riser 081 at the top of the cutting motor hole 02, the riser pad 091 is located inside the cutting motor hole 02. For the fourth riser 084 outside the traction motor hole 04 or the double-stage planetary mechanism hole 05 of the traction unit, the riser pad 092 is located outside the traction motor hole 04 or the double-stage planetary mechanism hole 05 of the traction unit.

[0047] Preferably, the diameter range of the riser with a circular cross-section is 180 mm to 240 mm. The short axis range of the riser with an elliptical cross-section is 200 mm to 260 mm, and the long axis range is 300 mm to 390 mm. The height of the riser is 350 to 550 mm. The height range of the riser pad is 350 mm to 450 mm.

[0048] In another embodiment, it further includes chill blocks 010, which are located on the parts of the first housing or the second housing not covered by the riser pads, and are beneficial to promoting the sequential solidification of the casting.

[0049] The casting structure 100 of the short-arm transmission housing for a shearer in this application has a simple structure. The position layouts of the cutting motor hole 02, the transmission mechanism hole 03, the traction motor hole 04, the double-stage planetary mechanism hole 05 of the traction unit, the guide shoe hole 06, and the rack oil cylinder chamber 07 are reasonable. The riser helps to reduce the shrinkage of the casting after solidification and can also overflow to collect some of the cold and dirty molten steel in the early stage. The riser pad is beneficial to preventing crack defects from occurring inside the cutting motor hole 02, the rack oil cylinder chamber 07, the guide shoe hole 06, the traction motor hole 04, the double-stage planetary mechanism hole 05 of the traction unit, or at the intersection of the first housing 011 and the second housing.

[0050] This application also includes a gating assembly 200, which includes an ingate 201, a runner 202, and a downsprue 203. The ingate 201 and the runner 202 are perpendicular to each other and are used to transfer molten steel in the vertical or horizontal direction. One end of the ingate 201 is connected to the runner 202 or the downsprue 203, and the other end is connected to the riser 08. Then, the molten steel in the runner 202 or the downsprue 203 is transmitted to the parts to be cast through the riser 08. The gating assembly is designed as a bottom-gating type, and the molten steel sequentially enters the riser 08 from bottom to top in the reverse direction of the y-axis and then enters the cavity, which helps to reduce the impact force of the molten steel on the cavity and reduce defects such as sand inclusion and adhering sand caused by the impact of the molten steel.

[0051] In a preferred embodiment, the ratio of the cross-sectional areas of the sprue 203, the runner 202, and the ingate 201 is 1:1.2:1.5 to ensure a large flow rate and stable filling of the molten steel. The length of the ingate 201 is less than or equal to 500 mm, and there is sufficient filling space around the ingate 093 to reduce collisions with the sand mold, ensure stable filling of the molten steel, improve the feeding capacity of the riser, and allow the molten steel to enter the cavity through the bottom of the riser.

[0052] This application uses a bottom-pouring gating assembly to allow the molten steel to enter the cavity from bottom to top, reducing the impact force of the molten steel on the cavity and minimizing defects such as sand inclusion and sand adhesion caused by the impact of the molten steel.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical concept disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A casting structure of a short arm transmission housing for a coal mining machine, characterized in that: It includes a shell, a cutting motor hole, a transmission mechanism hole, a traction motor hole, a two-stage planetary mechanism hole of the traction unit, a guide sliding shoe hole and a rack cylinder chamber. The shell includes a first shell and a second shell. The cutting motor hole, the transmission mechanism hole, the traction motor hole and the two-stage planetary mechanism hole of the traction unit are arranged in sequence and in parallel on the first shell. The guide sliding shoe hole is located on the end face of the second shell away from the first shell, and the rack cylinder chamber runs through the second shell.

2. The casting structure of the short arm transmission housing for a coal mining machine according to claim 1, characterized in that: The cutting motor hole, the transmission mechanism hole, the traction motor hole or the traction part double-stage planetary mechanism hole are all through holes, and the axes of the through holes are parallel to each other.

3. The casting structure of the short arm transmission housing for a coal mining machine according to claim 1, characterized in that: It comprises two guide shoe holes, which are respectively arranged on both sides of the end surface of the second shell body and close to the two ends of the rack cylinder chamber.

4. The casting structure of the short arm transmission housing for a coal mining machine according to claim 1, characterized in that: It also includes risers, which are respectively located inside the cutting motor hole, the rack cylinder chamber, the guide shoe hole, the traction motor hole, the traction part double-stage planetary mechanism hole, or the intersection of the first shell and the second shell.

5. The casting structure of the short arm transmission housing for a coal mining machine according to claim 4, characterized in that: The bottom of the riser may also include a riser subsidy.

6. The casting structure of the short arm transmission housing for a coal mining machine according to claim 4, characterized in that: The cross section of the riser is circular or elliptical. The diameter of the riser with a circular cross section ranges from 180 mm to 240 mm. The short axis of the riser with an elliptical cross section ranges from 200 mm to 260 mm, and the long axis ranges from 300 mm to 390 mm. The height of the riser is 350 to 550 mm.

7. The casting structure of the short arm transmission housing for a coal mining machine according to claim 5, characterized in that: The height of the riser subsidy ranges from 350 mm to 450 mm.

8. The casting structure of the short arm transmission housing for a coal mining machine according to claim 5, characterized in that: The riser subsidy is located inside the cutting motor hole, or outside the traction motor hole and the traction part double-stage planetary mechanism hole.

9. The casting structure of the short arm transmission housing for a coal mining machine according to claim 4, characterized in that: It also includes a casting assembly, including an ingrate, a runner and a straight runner, wherein the ingrate and the runner are perpendicular to each other, one end of the ingrate is connected to the runner or the straight runner, and the other end is connected to the riser.

10. A casting structure of a short arm transmission housing for a coal mining machine as claimed in claim 9, characterized in that: The ratio of the cross-sectional areas of the sprue, the runner and the inner runner is 1:1.2:1.5.

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