A planet carrier ring belt cold core core insulation riser sleeve

Abstract

The utility model discloses a kind of planet wheel carrier ring belt cold core core insulation riser sleeve, it contains sleeve body, the sleeve body is set in the cold core at planet wheel carrier ring belt place, the sleeve body is split structure, it is combined by bottom conical sleeve, middle cylindrical sleeve and top conical sleeve, two two adjacent components are respectively connected by positioning mechanism each other, the lower end of the bottom conical sleeve is provided with communicating port, the communicating port can be communicated with the cavity of planet wheel carrier, the inner cavity upper end of the top conical sleeve is respectively provided with exhaust hole and pressure cone.The utility model sets up riser sleeve in cold core, can effectively supplement the hot section area of planet wheel carrier ring belt place, improves the casting quality of planet wheel carrier.

Description

Technical Field

[0001] This utility model relates to a riser sleeve for casting, and more particularly to a planetary gear carrier ring with a cold core core for heat insulation. Background Technology

[0002] Our company needs to cast a planetary gear carrier. The ring belt wall thickness of the planetary gear carrier changes, which is a hot spot area that is prone to shrinkage porosity. Since this area will be machined into a gear, the mechanical properties and internal shrinkage porosity requirements are very strict. Because this area is in the lower box and the parting surface is far from the hot spot area, it is not possible to effectively compensate for the shrinkage in the hot spot area through an external side riser.

[0003] A riser is an additional part attached to the top or side of a casting to prevent defects. In the mold, the cavity of the riser is a chamber for storing liquid metal. It replenishes the metal during casting formation and has the functions of preventing shrinkage cavities, porosity, venting, and slag collection.

[0004] Authorization announcement number CN218340952U discloses an insulating riser sleeve for ductile iron casting bridge shells, including a riser sleeve; the riser sleeve is a hollow shell, with an exhaust channel and a pressure cone at the upper end and a riser opening at the lower end; when the insulating riser sleeve is used on the bridge shell, the riser opening is placed on the outside of the bridge shell, which is conducive to shearing, and can be widely used for feeding of ductile iron casting bridge shells made of wet molding sand.

[0005] The aforementioned patented technology has some shortcomings: firstly, the use of external feeding is not conducive to eliminating hot spots; secondly, the riser opening is too large, which is not conducive to removing residues. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a planetary gear carrier ring with cold core core insulation riser sleeve that is reasonably designed, has a good shrinkage effect, and is easy to remove residual material.

[0007] The technical solution of this utility model is: A heat-insulating riser sleeve for a planetary gear carrier ring core includes a sleeve body, which is disposed in the cold core at the planetary gear carrier ring. The sleeve body has a split structure, consisting of a bottom conical sleeve, a middle cylindrical sleeve, and a top conical sleeve. Each pair of adjacent components is connected to each other by a positioning mechanism. The lower end of the bottom conical sleeve is provided with a communication port that can communicate with the cavity of the planetary gear carrier. The upper end of the inner cavity of the top conical sleeve is provided with an exhaust hole and a pressure cone.

[0008] Furthermore: the exhaust port is a frustum-shaped hollow structure with a bottom diameter of 10-20mm and an top diameter smaller than the bottom diameter.

[0009] Furthermore, the pressure cone has a V-shaped structure and is located in the middle position, and the included angle of the apex of the pressure cone is 30° to 60°.

[0010] Furthermore: the sleeve is made of heat-insulating or heat-generating materials, wherein the heat-insulating materials include rock wool, aluminum silicate fiber, ceramic fiber or expanded perlite; and the heat-generating materials include aluminum powder, magnesium powder, iron oxide powder, carbon powder or silicon powder.

[0011] Furthermore, the positioning mechanism includes mutually matching stepped positioning rings on the contact surface, which can be used for vertical positioning as well as horizontal and vertical positioning.

[0012] The beneficial effects of this utility model are: 1. This utility model sets a riser sleeve in the cold core, which can effectively compensate for the hot spot area at the planetary gear carrier ring belt, thereby improving the casting quality of the planetary gear carrier.

[0013] 2. The riser sleeve of this utility model is made of heat-insulating or heat-generating materials to keep the molten iron warm or heat it, thereby prolonging the solidification time of the molten iron and playing a role in feeding the casting.

[0014] 3. The bottom of this utility model is tapered, which can ensure that the inner cavity of the riser sleeve is connected to the casting cavity, and reduce the contact area, making it easier to cut off the residue in the later stage, saving effort and time.

[0015] 4. This utility model adopts a split structure, which can reduce the manufacturing difficulty and cost. At the same time, the split parts are positioned by a ring-shaped stepped structure, which has good stability.

[0016] 5. This utility model has a reasonable design, good shrinkage compensation effect and easy removal of residues. It has a wide range of applications, is easy to promote and implement, and has good economic benefits. Attached Figure Description

[0017] Figure 1 A schematic diagram of the positioning pin sleeve of a planetary gear carrier ring with a cold core core insulation riser sleeve; Figure 2 for Figure 1 A top view of the positioning pin sleeve of a planetary gear carrier ring with a cold core core insulation riser sleeve. Detailed Implementation

[0018] Example 1: See Figure 1 -- Figure 2 In the figure, 1-connecting port, 2-bottom conical sleeve, 3-middle cylindrical sleeve, 4-top conical sleeve, 5-vent hole, 6-pressure cone, 7-positioning mechanism.

[0019] In this embodiment, "bottom," "middle," and "top" are merely convenient terms for description and are not intended to limit the relevant features. Depending on the actual situation, their names can be changed without affecting the substantive content of this application.

[0020] A heat-insulating riser sleeve for a planetary gear carrier ring belt cold core includes a sleeve body, wherein: the sleeve body is disposed in the cold core at the planetary gear carrier ring belt, the sleeve body is a split structure, composed of a bottom conical sleeve 2, a middle cylindrical sleeve 3 and a top conical sleeve 4, and each pair of adjacent parts are connected to each other by a positioning mechanism 7. The lower end of the bottom conical sleeve 2 is provided with a connecting port 1, which can communicate with the cavity of the planetary gear carrier, and the upper end of the inner cavity of the top conical sleeve 4 is provided with an exhaust hole 5 and a pressure cone 6 respectively.

[0021] Preferred solution: The exhaust port 5 is a truncated cone hollow structure with a bottom diameter of 10-20mm and an upper bottom diameter smaller than the bottom diameter. The pressure cone 6 is a V-shaped structure located in the middle. The included angle of the apex of the pressure cone 6 is 30° to 60°. The specific dimensions mentioned above are subject to the actual situation and are not listed here.

[0022] Preferred option: The casing is made of heat-absorbing or heat-generating materials. The heat-insulating materials include rock wool, aluminum silicate fiber, ceramic fiber or expanded perlite; the heat-generating materials include aluminum powder, magnesium powder, iron oxide powder, carbon powder or silicon powder.

[0023] Preferred solution: The positioning mechanism 7 includes mutually matching stepped positioning rings on the contact surface, which can be used for vertical positioning as well as horizontal and vertical positioning.

[0024] When in use, the molten iron inside the sleeve can effectively compensate for the hot spot area at the planetary gear carrier ring belt, improving the strength of the ring belt and facilitating the subsequent machining of gears.

[0025] The function of exhaust port 5 is: (1) Exhausting gas from the mold cavity: When the hot molten metal comes into contact with the sand mold during casting, a large amount of gas will be generated (such as water evaporation and organic matter combustion). The exhaust hole serves as a channel to quickly exhaust these gases and avoid the formation of defects such as pores and slag inclusions.

[0026] (2) Balancing internal and external air pressure: When molten metal fills the mold cavity, a sudden increase in air pressure in the enclosed space may lead to incomplete filling. The vent hole maintains the internal and external pressure balance, ensuring that the molten metal smoothly fills the complex mold cavity.

[0027] (3) Auxiliary riser function: In feeding risers, the vent hole can accelerate the discharge of solidification shrinkage gas in the molten metal inside the riser, improve the feeding efficiency of the riser for castings, and reduce shrinkage defects.

[0028] The function of pressure cone 6 is: (1) Maintain feeding pressure: The static pressure generated by the conical structure pushes the molten metal in the riser to feed the casting and avoid shrinkage defects.

[0029] (2) Extending solidification time: The conical design increases the volume of the riser, delaying its solidification and ensuring that there is always liquid metal available to replenish the casting during the solidification process. This forms directional solidification from the casting to the riser, causing shrinkage cavities to concentrate in the riser and increasing the density of the casting.

[0030] Example 2: This example is basically the same as Example 1, and the similarities will not be repeated. The difference is that the structure of the positioning mechanism is different. In this example, the positioning mechanism includes positioning holes and positioning pins. Positioning holes are respectively provided on the contact surfaces of adjacent components, and positioning pins can be inserted into the positioning holes to achieve positioning between adjacent components.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications made based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A planetary gear carrier ring with a cold core core insulation riser sleeve, comprising a sleeve body, characterized in that: The sleeve is disposed in the cold core at the planetary gear carrier ring belt. The sleeve is a split structure, composed of a bottom conical sleeve, a middle cylindrical sleeve and a top conical sleeve. Each pair of adjacent parts is connected to each other by a positioning mechanism. The lower end of the bottom conical sleeve is provided with a communication port, which can communicate with the cavity of the planetary gear carrier. The upper end of the inner cavity of the top conical sleeve is provided with an exhaust hole and a pressure cone.

2. The planetary gear carrier ring with cold core core insulation riser sleeve according to claim 1, characterized in that: The exhaust port is a truncated cone-shaped hollow structure with a bottom diameter of 10-20mm and an top diameter smaller than the bottom diameter.

3. The planetary gear carrier ring with cold core core insulation riser sleeve according to claim 1, characterized in that: The pressure cone has a V-shaped structure and is located in the middle position. The included angle of the apex of the pressure cone is 30° to 60°.

4. A planetary gear carrier ring with a cold core core insulation riser sleeve according to claim 1, characterized in that: The positioning mechanism includes mutually matching stepped positioning rings on the contact surface, which can be used for vertical positioning as well as horizontal and vertical positioning.

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