Integrated injection molding structure type air door for automobile cooling fan

Abstract

The invention discloses an integrated injection molding structure type air door for an automobile cooling fan. The integrated injection molding structure type air door comprises a fan cover and an air door body. The fan cover and the air door body are of an integrated injection molding structure. A rectangular ventilation hole is formed in the center of the fan cover, and two connecting shafts are symmetrically and integrally arranged at the upper ends of the left side and the right side of the rectangular ventilation hole in an injection molding mode. The air door body is arranged at the rectangular ventilation hole in a matched mode, and two connecting holes are symmetrically and integrally formed in the upper ends of the left side and the right side of the air door body in an injection molding mode. One ends of the two connecting shafts are fixedly connected to the fan cover, and the other ends of the two connecting shafts are arranged in the two connecting holes in a one-to-one correspondence mode, so that the air door body can open or close the rectangular ventilation holes with the two connecting shafts as rotating shafts. Seamless connection is achieved through the integrated injection molding technology of the air door body and the fan cover, and the overall strength and stability are remarkably improved. A cross shaft structure is arranged inside, and the flexible cross shaft design is ingeniously integrated at the movable part of the air door, so that the flexibility of movement is ensured, and the firmness of the structure is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to automobile cooling fan, specifically relates to a kind of integrated injection molding structure formula air door for automobile cooling fan. BACKGROUND

[0002] The structure between air door body and cowling on basically all automobile cooling fans on the market is split structure, i.e., air door body and cowling are integrally injection molded, and then assembled after injection molding is completed, and the assembly process is complex and tedious, and the labor cost and mold cost are high.

[0003] And the connection between air door body and cowling is easy to loosen, and the connecting piece in split design is easy to loosen due to vibration, bumping and other factors, which affects product reliability.

[0004] In addition, split type is not advantageous in weight, and compared with integrated structure, split structure is heavier, which is not conducive to the trend of automobile lightweight design. SUMMARY

[0005] To solve the problems in the prior art, the present application provides an integrated injection molding structure air door for automobile cooling fan, which realizes seamless connection through integrated injection molding technology of air door body and cowling, and significantly improves overall strength and stability. The technical scheme is built-in cross shaft structure, and flexible cross shaft design is ingeniously integrated in the movable part of air door, which ensures the sensitivity of movement and enhances the firmness of structure.

[0006] The technical scheme of the present application is: an integrated injection molding structure air door for automobile cooling fan, comprising a cowling and an air door body; the cowling and the air door body are integrally injection molded;

[0007] A rectangular ventilation hole is formed in the center of the cowling, and two connecting shafts are integrally injection molded on the left and right sides of the upper end of the rectangular ventilation hole;

[0008] The air door body is arranged at the rectangular ventilation hole, and two connecting holes are integrally injection molded on the left and right sides of the upper end of the air door body;

[0009] One end of the two connecting shafts is fixedly connected to the cowling, and the other end is correspondingly built-in in the two connecting holes, so that the air door body can open or close the rectangular ventilation hole with the two connecting shafts as the rotating shaft.

[0010] Further, the connecting shaft is a cross-shaped shaft. The structural design of the connecting shaft can be designed into a circular shape or a triangular shape in theory, but the cross-shaped structure is more stable than other special-shaped structures, without flash burrs and the like, and is more economical and cost-saving from the perspective of the mold. If the structure is circular, the tolerance is not easy to control, and there will be abnormal noise when the damper is opened and closed. Considering the above situations, the cross-shaped structure design is more stable.

[0011] Further, the length between the upper ends of the left and right sides of the damper body is 1mm±0.2mm smaller than the length of the left and right sides of the rectangular ventilation hole. It is convenient and stable to demold.

[0012] Further, the length between the lower ends of the left and right sides of the damper body is greater than the length of the left and right sides of the rectangular ventilation hole. The damper body is limited to prevent the damper body from moving towards the inner side of the fan cover.

[0013] Further, the main body of the connecting hole is a circular ring integrally injection molded on the back of the damper body. It is convenient to demold by injection molding.

[0014] The beneficial effects of the present application are: to provide an integrated injection molding structure type damper for a car cooling fan, which realizes seamless connection through the damper body and the fan cover integrated injection molding technology, significantly improves the overall strength and stability. The technical scheme internally provides a cross-shaped shaft structure, and the flexible cross-shaped shaft design is ingeniously integrated at the movable part of the damper, which not only ensures the sensitivity of the movement, but also enhances the structural firmness.

[0015] 1. The number of damper parts is greatly reduced. Through the integrated injection molding technology, the number of damper parts is reduced by 100%, realizing extreme simplification and reshaping the industry standard.

[0016] 2. Assembly efficiency reform, abandon the traditional structure 27s assembly, integrated injection molding realizes 0s assembly, greatly improves the production efficiency. The production rhythm is significantly improved by 25%, from the original 107s to 80s.

[0017] 3. Reliability is significantly enhanced, product failure rate is reduced by 80%, eliminating the risk of damper falling off the fan cover, providing double insurance for production and personnel safety.

[0018] 4. Product quality is improved. Through technical innovation, the product quality is significantly improved, which can meet higher standard requirements.

[0019] 5. The cost is more advantageous than the traditional structure, and the intermediate link is greatly reduced due to the simplified design of the integrated injection molding, and the single piece cost is significantly reduced by 22%, and the long-term operating cost also decreases.

[0020] 6. Resource conservation is also more advantageous than traditional structures. Through topology optimization design, the innovative one-piece injection molding structure achieves a lighter weight than traditional structures. Reduced material usage results in better cost control and provides greater profit margins. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a one-piece injection-molded damper used in automotive cooling fans.

[0022] Figure 2 This is a partial schematic diagram of the connection hole of the damper body.

[0023] In the diagram: 1 is the wind cover, 2 is the damper body, 3 is the connecting shaft, and 4 is the connecting hole. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] like Figure 1 As shown, an integrally injection-molded damper for automotive cooling fans includes a shroud 1 and a damper body 2. The shroud 1 and the damper body 2 are integrally injection-molded structures.

[0026] The wind cover 1 has a rectangular ventilation hole in the center, and two connecting shafts 3 are integrally injection molded symmetrically on the upper ends of the left and right sides of the rectangular ventilation hole.

[0027] The damper body 2 is fitted at the rectangular ventilation hole shown, and two integrally injection molded connection holes 4 are symmetrically formed on the upper ends of the left and right sides of the damper body 2.

[0028] Two connecting shafts 3 are fixedly connected at one end to the hood 1, and the other end is correspondingly embedded in two connecting holes 4, so that the damper body 2 can open or close the rectangular ventilation hole with the two connecting shafts 3 as the rotation axis.

[0029] The length between the upper ends of the left and right sides of the damper body 2 is 1mm ± 0.2mm shorter than the length of the left and right sides of the rectangular ventilation hole. This facilitates stable demolding. The length between the lower ends of the left and right sides of the damper body 2 is greater than the length of the left and right sides of the rectangular ventilation hole. This limits the damper body and prevents it from moving towards the inside of the hood.

[0030] In this embodiment, the connecting shaft 3 is a cross-shaped shaft. Theoretically, the connecting shaft can be designed in other shapes such as circles or triangles, but a cross-shaped shaft results in smoother demolding compared to other irregular shapes, eliminating burrs and flash. From a mold-making perspective, it is more economical and cost-effective. A circular structure would make tolerance control difficult, leading to abnormal noises when the damper is opened or closed. Considering all these factors, the cross-shaped shaft design is more reliable.

[0031] Preferably, as shown in the drawings, the main body of the connecting hole 4 is a circular ring integrally injection molded on the back of the air door main body 2. It is convenient to injection mold demolding. Figure 2

[0032] The traditional design of the air door main body and the air cover is mainly in the form of assembly. The integrated molding technology overturns this concept, and the air cover injection molding does not need to be assembled in the form of assembly. After the air cover injection molding is completed, it has an air door structure, and the integrated injection molding has no effect on the structural strength of the air cover. Through physical verification, the air door main body and the air cover integrally injection molded can also achieve the function of the traditional air door and air cover assembly, and the integrated air door is more firm, and the air door basically will not fall off from the air cover. This is not easy.

[0033] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.​

Claims

1. A one-piece injection-molded damper for use in automotive cooling fans, characterized in that: It includes a wind shield (1) and a damper body (2); the wind shield (1) and the damper body (2) are integrally injection molded structures; The wind cover (1) has a rectangular ventilation hole in the center, and two connecting shafts (3) are integrally injection molded symmetrically on the upper ends of the left and right sides of the rectangular ventilation hole. The damper body (2) is fitted at the rectangular ventilation hole shown, and two connecting holes (4) are integrally injection molded symmetrically on the upper left and right sides of the damper body (2). Two connecting shafts (3) are fixedly connected at one end to the hood (1), and the other end is built into two connecting holes (4) respectively, so that the damper body (2) can open or close the rectangular ventilation hole with the two connecting shafts (3) as the rotation axis.

2. The integrated injection-molded damper for an automotive cooling fan according to claim 1, characterized in that: The connecting shaft (3) is a cross-shaped shaft.

3. The integrated injection-molded damper for an automotive cooling fan according to claim 1, characterized in that: The length between the upper ends of the left and right sides of the damper body (2) is 1mm ± 0.2mm shorter than the length of the left and right sides of the rectangular ventilation hole.

4. The integrated injection-molded damper for an automotive cooling fan according to claim 1, characterized in that: The length between the lower ends of the left and right sides of the damper body (2) is greater than the length between the left and right sides of the rectangular ventilation hole.

5. The integrated injection-molded damper for an automotive cooling fan according to claim 1, characterized in that: The main body of the connecting hole (4) is a circular ring integrally injection molded on the back of the damper body (2).

Images