Air cooling device for a motorcycle wheel hub

Abstract

The utility model discloses a kind of air cooling devices of motorcycle wheel hub, including lower mould core fixed plate, the top surface middle part of lower mould core fixed plate is fixed with lower mould core, the top surface of the edge of lower mould core fixed plate is fixed with multiple side modules, the adjacent inclined wall surface of all side modules is close, the lower part inner side wall of side module is close to the outer side wall of lower mould core, the upper of lower mould core is equipped with upper mould core, the top surface edge of the upper mould core is fixed with upper riser ring, the inner side wall of upper riser ring is formed with extension protruding ring above the top surface edge of upper mould core, multiple cooling through holes are formed in extension protruding ring, the bottom end of cooling through hole is formed with cooling hole in the top surface edge of upper mould core, cooling air blowing pipe is inserted in corresponding cooling through hole and cooling hole. It uses air cooling setting, carries out annular cooling to upper rim portion, compared with water cooling, air cooling is relatively mild, while improving the mechanical property of upper rim, it also does not cause the loose of upper rim portion.

Description

Technical fields:

[0001] This utility model relates to the field of automotive parts technology, and more specifically to an air-cooling device for motorcycle wheel hubs. Background technology:

[0002] Motorcycle aluminum alloy wheels, due to their structural characteristics, are currently mainly gravity cast. In order to ensure the feeding of the upper rim, a large riser is generally configured. However, a large riser will cause the upper rim to overheat, resulting in coarse dendrites in the upper rim. This leads to a decrease in the overall mechanical properties of the upper rim, i.e., the upper edge of the rim, especially the elongation, which is significantly different from that of the lower rim.

[0003] For some high-performance wheel hubs, a water-cooling ring is usually added to the mold of the upper rim to enhance cooling. However, the addition of the water-cooling ring makes it difficult to compensate for shrinkage in the upper rim area. If not properly controlled, it can cause large-area shrinkage porosity and scrap, resulting in a significant reduction in the yield rate. Utility Model Content:

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an air-cooling device for motorcycle wheel hubs. It adopts an air-cooling setup to perform circumferential cooling on the upper wheel flange. Compared with water cooling, air cooling is more gentle and can improve the mechanical properties of the upper wheel flange without causing shrinkage or loosening of the upper wheel flange.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] An air-cooling device for a motorcycle wheel hub includes a lower mold core fixing plate. A lower mold core is fixed to the center of the top surface of the lower mold core fixing plate. Multiple side modules are fixed to the top edge of the lower mold core fixing plate. The adjacent inclined walls of all side modules are in close contact. The lower inner side wall of the side module is in close contact with the outer side wall of the lower mold core. An upper mold core is provided above the lower mold core. An upper riser ring is fixed to the top edge of the upper mold core. An extended protrusion ring formed on the inner side wall of the upper riser ring is located above the top edge of the upper mold core. Multiple cooling through holes are formed at the extended protrusion ring. The bottom end of the cooling through holes faces the cooling hole formed on the top edge of the upper mold core. A cooling air pipe is inserted into the corresponding cooling through hole and cooling hole. The bottom end of the cooling air pipe is close to the bottom end of the cooling hole. A side through hole is formed on one side wall of the bottom of the cooling air pipe. The side through hole is close to the inner side wall of the upper wheel flange portion of the forming cavity between the upper mold core and the side modules.

[0007] There is a flow gap between the lower outer wall of the cooling air pipe and the inner wall of the cooling hole.

[0008] The distance between the cooling holes and the corresponding inner sidewalls of the molding cavity is 6 to 10 mm.

[0009] The outstanding effect of this utility model is:

[0010] It uses an air-cooling system to provide circumferential cooling to the upper rim. Compared to water cooling, air cooling is gentler and improves the mechanical properties of the upper rim without causing shrinkage or loosening of the upper rim. Attached image description:

[0011] Figure 1 This is a simplified partial structural diagram of the present invention;

[0012] Figure 2 This is a partial structural diagram of the upper mold core of this utility model;

[0013] Figure 3 This is a partial structural diagram of the annular flow tube.

[0014] Figure 4 yes Figure 3 A partial top view;

[0015] Figure 5 yes Figure 1 A magnified view of a portion of the image. Detailed implementation method:

[0016] For example, see below. Figures 1 to 5 As shown, an air cooling device for a motorcycle wheel hub includes a lower mold core fixing plate 10, a lower mold core 20 fixed in the middle of the top surface of the lower mold core fixing plate 10, a cooling water plate fixed in the middle bottom surface of the lower mold core 20, a lower mold center core fixed in the middle of the top surface of the cooling water plate, the lower mold center core being located in the middle through hole of the lower mold core 20, and a flow divider cone fixed in the middle of the top surface of the lower mold center core.

[0017] Multiple side modules 30 are fixed on the top edge of the lower mold core fixing plate 10. The inclined walls of two adjacent side modules 30 are in close contact with each other. The lower inner side wall of the side module 30 is in close contact with the outer side wall of the lower mold core 20. An upper mold core 40 is provided above the lower mold core 20.

[0018] An upper riser ring 50 is fixed to the top edge of the upper mold core 20. An extended protrusion ring 51 formed on the inner sidewall of the upper riser ring 50 is located above the top edge of the upper mold core 20. Multiple cooling through holes 52 are formed at the extended protrusion ring 51. The bottom end of the cooling through holes 52 faces the cooling hole 41 formed on the top edge of the upper mold core 40. A cooling air pipe 60 is inserted into the corresponding cooling through hole 52 and cooling hole 41. The bottom end of the cooling air pipe 60 is close to the bottom end of the cooling hole 41. A side through hole 61 is formed on one side wall of the bottom of the cooling air pipe 60. The side through hole 61 is close to the inner sidewall of the upper rim forming part of the forming cavity between the upper mold core 20 and the side module 30. The bottom end of the cooling air pipe 60 is sealed, and its pipe diameter is 2mm to 5mm.

[0019] Furthermore, there is a flow gap 1 between the lower outer wall of the cooling air pipe 60 and the inner wall of the cooling hole 41.

[0020] Furthermore, the distance 'a' between the cooling hole 41 and the corresponding inner wall of the molding cavity is 6 to 10 mm, and in this embodiment, the distance is 8 mm at the middle position.

[0021] Furthermore, an annular flow tube 53 with an inner diameter of approximately 12 mm is provided above the extended protrusion ring 51.

[0022] The annular flow tube 53 can be fixed to the top surface of the extended protrusion ring 51 via a connecting block. Multiple cooling air pipes 50 are welded and fixed to the bottom surface of the annular flow tube 53. The cooling air pipes 50 communicate with and correspond to the through holes formed on the bottom wall plate of the annular flow tube 53. In this embodiment, 18 cooling air pipes 50 are connected, each approximately 15mm in length, and their side through holes 61 have an inner diameter of approximately 2mm.

[0023] The cooling air pipe 50 is located on the top surface of the upper mold core 40, directly above the forming end of the rim and spokes of the hub 100.

[0024] Furthermore, the top plate at the left end and the top plate at the right end of the annular flow tube 53 are respectively welded with a first air inlet connecting pipe 54 and a second air inlet connecting pipe 55. The air outlets of the first air inlet connecting pipe 54 and the second air inlet connecting pipe 55 are connected to and correspond to the through holes on the top plate at the left end and the top plate at the right end of the annular flow tube 53.

[0025] The second intake connection pipe 55 is bent in an arc shape along the upper part of the annular flow pipe body 53, and its inlet end is on the same side as the inlet end of the first intake connection pipe 54.

[0026] In this embodiment, the entire production cycle of the wheel hub is approximately 230 seconds, with the cooling device activated at 160 seconds, for a total activation time of approximately 70 seconds. This concentrates cooling primarily in the latter half of the process, avoiding the initial aluminum molten metal filling stage.

[0027] In this embodiment, air is introduced at both ends of the first air inlet connecting pipe 54 and the second air inlet connecting pipe 55 to ensure sufficient low-temperature gas.

[0028] When in use, its air cooling can cool the upper rim of the forming cavity, as well as the forming ends of the rim and spokes of the hub 100 (which are thicker and cool more slowly), thereby accelerating the cooling speed of the corresponding positions. At the same time, compared with water cooling, it is more gentle, improving the mechanical properties of the upper rim without causing shrinkage of the upper rim.

[0029] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. An air-cooling device for a motorcycle wheel hub, comprising a lower mold core fixing plate (10), a lower mold core (20) fixed in the middle of the top surface of the lower mold core fixing plate (10), a plurality of side modules (30) fixed in the top surface of the side of the lower mold core fixing plate (10), the oblique walls of two adjacent side modules (30) of all side modules (30) being in close contact, the lower inner side wall of the side module (30) being in close contact with the outer side wall of the lower mold core (20), and an upper mold core (40) provided above the lower mold core (20), characterized in that: The upper mold core (40) has an upper riser ring (50) fixed on the top edge. An extended protrusion ring (51) formed on the inner sidewall of the upper riser ring (50) is located above the top edge of the upper mold core (40). Multiple cooling through holes (52) are formed at the extended protrusion ring (51). The bottom end of the cooling through hole (52) faces the cooling hole (41) formed on the top edge of the upper mold core (40). The cooling air pipe (60) is inserted into the corresponding cooling through hole (52) and cooling hole (41). The bottom end of the cooling air pipe (60) is close to the bottom end of the cooling hole (41). A side through hole (61) is formed on one side wall of the bottom of the cooling air pipe (60). The side through hole (61) is close to the inner sidewall of the upper rim forming part of the forming cavity between the upper mold core (40) and the side module (30).

2. The air-cooling device for a motorcycle wheel hub according to claim 1, characterized in that: There is a flow gap (1) between the lower outer wall of the cooling air pipe (60) and the inner wall of the cooling hole (41).

3. The air-cooling device for a motorcycle wheel hub according to claim 1, characterized in that: The distance (a) between the cooling hole (41) and the corresponding inner wall of the molding cavity is 6 to 10 mm.

4. The air-cooling device for a motorcycle wheel hub according to claim 1, characterized in that: Above the extended protrusion ring (51) is an annular flow tube (53), and multiple cooling air pipes (60) are welded and fixed on the bottom surface of the annular flow tube (53). The cooling air pipes (60) are connected to and correspond to the corresponding through holes formed on the bottom wall plate of the annular flow tube (53).

5. The air-cooling device for a motorcycle wheel hub according to claim 4, characterized in that: The top plate at the left end and the top plate at the right end of the annular flow tube (53) are respectively welded with a first air inlet connecting pipe (54) and a second air inlet connecting pipe (55). The air outlets of the first air inlet connecting pipe (54) and the second air inlet connecting pipe (55) are connected to and correspond to the through holes on the top plate at the left end and the top plate at the right end of the annular flow tube (53).

6. The air-cooling device for a motorcycle wheel hub according to claim 5, characterized in that: The second intake connection pipe (55) is curved along the upper part of the annular flow pipe body (53), and its inlet end is on the same side as the inlet end of the first intake connection pipe (54).

7. The air-cooling device for a motorcycle wheel hub according to claim 1, characterized in that: The cooling hole (41) is located on the top surface of the upper mold core (40) directly above the forming end of the rim and spokes of the hub (100).

Images