Cover plate and shell connecting structure and air dryer

Abstract

The utility model discloses a cover plate and shell connecting structure and an air dryer, the cover plate and shell connecting structure comprises a shell and a cover plate, the cover plate comprises a middle main body part and an outer ring connecting part, the lower part of the middle main body part is buckled in the shell, and the outer ring connecting part is buckled in the shell. And the outer ring connecting part is positioned outside the shell and the middle main body part and forms a secondary injection molding integrated piece with the shell and the middle main body part. The cover plate and shell connecting structure adopting the structure can greatly improve the reliability and the air tightness of the connection between the cover plate and the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of dryer equipment, and more specifically, to a connection structure between a cover plate and a shell. In addition, the utility model also relates to an air dryer including the above connection structure between the cover plate and the shell. Background Art

[0002] The function of an air dryer is to absorb moisture in the air, and it is commonly used to solve the problem of excessive humidity in the air supply of an air suspension air supply unit.

[0003] An air dryer includes a shell and a cover plate connected to the upper part of the shell. The cover plate structure of the existing air dryer is relatively complex. The cover plate 1 needs to be separately processed and formed and then connected to the shell 2 by welding, as Figure 1 shown. However, welding has relatively high requirements for operating skills, and poor control during the operation process will restrict the reliability and airtightness of the connection between the cover plate and the shell.

[0004] In summary, how to solve the poor reliability and airtightness of the connection between the cover plate and the shell in the existing air dryer is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a connection structure between a cover plate and a shell, which can significantly improve the reliability and airtightness of the connection between the cover plate and the shell.

[0006] Another purpose of the utility model is to provide an air dryer including the above connection structure between the cover plate and the shell.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A connection structure between a cover plate and a shell, including a shell and a cover plate. The cover plate includes a middle main body part and an outer ring connection part. The lower part of the middle main body part is buckled and arranged inside the shell, and the outer ring connection part is located outside the shell and the middle main body part and forms a two-shot injection molded integral part with the two.

[0009] Preferably, a convex ring is provided on the upper end surface of the shell. The upper end surface of the convex ring, the inner peripheral surface of the convex ring, and the upper end surface of the shell located inside the convex ring are all in contact with the middle main body part, and the outer peripheral surface of the convex ring, the outer peripheral surface of the middle main body part, and the upper end surface of the shell located outside the convex ring are all in contact with the outer ring connection part.

[0010] Preferably, the outer peripheral surface of the middle main body part is set as a conical table surface that gradually inclines outward from top to bottom.

[0011] Preferably, the middle main body portion includes a tapered portion and a fastening portion which are integrally provided from top to bottom. The fastening portion is fastened and connected to a convex ring provided on the upper end surface of the housing. The outer diameter of the tapered portion gradually increases from top to bottom, and the lower end surface of the tapered portion presses against the upper end surface of the convex ring.

[0012] Preferably, the contour line of the outer peripheral surface of the middle main body portion is a first toothed line, and the contour line of the inner peripheral surface of the outer ring connection portion corresponding to the position of the middle main body portion is a second toothed line. The first toothed line and the second toothed line are engaged with each other.

[0013] Preferably, the first toothed line is a triangular serrated line.

[0014] Preferably, the contour line of the outer peripheral surface of the convex ring is a third toothed line, and the contour line of the inner peripheral surface of the outer ring connection portion corresponding to the position of the convex ring is a fourth toothed line. The third toothed line and the fourth toothed line are engaged with each other.

[0015] Preferably, the third toothed line is a rectangular toothed line.

[0016] Preferably, the upper end of the housing is provided with an outward flange, and the flange is in contact with the outer ring connection portion.

[0017] An air dryer includes the cover plate and housing connection structure according to any one of the above.

[0018] Compared with the prior art in which the cover plate is directly welded to the upper end surface of the housing to form a seal, in this application, the structurally complex cover plate is divided into a middle main body portion and an outer ring connection portion. The middle main body portion is fastened to the upper end surface of the housing to form a primary seal, and the outer ring connection portion is integrally connected to the outside of the middle main body portion and the outside of the housing by a secondary injection molding method to form a secondary seal. Therefore, this application has the following beneficial effects: First, a two-stage seal structure is formed between the cover plate and the housing, which can improve the airtightness of the connection between the cover plate and the housing; Second, by dividing the structurally complex cover plate into two parts and connecting them to the upper end surface of the housing respectively, it is not only convenient for the processing and manufacturing of the cover plate, but also can improve the reliability of the connection between the cover plate and the housing; Third, the secondary injection molding connection has better processing accuracy and quality than welding, and it is easier to ensure the tight connection between the cover plate and the housing, thereby improving the reliability and airtightness of the connection between the cover plate and the housing. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 It is a cross-sectional view of the connection structure between the existing cover plate and the housing;

[0021] Figure 2 It is a cross-sectional view of the connection structure between the cover plate and the housing provided by the present utility model;

[0022] Figure 3 It is a schematic structural diagram of the middle main body part provided by the present utility model;

[0023] Figure 4 It is a schematic structural diagram of the outer ring connection part provided by the present utility model;

[0024] Figure 5 It is a schematic structural diagram of the air dryer provided by the present utility model.

[0025] Appendix Figure 1 Marking:

[0026] 1 - Cover plate; 2 - Housing.

[0027] Appendix Figures 2 - 5 Marking:

[0028] 1 - Cover plate; 11 - Middle main body part; 12 - Outer ring connection part;

[0029] 2 - Housing; 21 - Flange;

[0030] 3 - Convex ring. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] The core of the present utility model is to provide a connection structure between a cover plate and a housing, and this connection structure between the cover plate and the housing can significantly improve the reliability and airtightness of the connection between the cover plate and the housing.

[0033] Another core of the present utility model is to provide an air dryer including the above connection structure between the cover plate and the housing.

[0034] It should be noted that, in this embodiment, the orientation or positional relationship indicated by "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, "first", "second", "third" are only used to describe the beneficial effects and cannot be understood as indicating or implying relative importance.

[0035] Please refer to Figures 2 - 4 , the present application provides a connection structure between a cover plate and a housing, including a housing 2 and a cover plate 1. The cover plate 1 includes an intermediate main body portion 11 and an outer ring connection portion 12. The lower part of the intermediate main body portion 11 is snap-fitted inside the housing 2, and the outer ring connection portion 12 is located outside the housing 2 and the intermediate main body portion 11 and forms a two-shot integrated part with the two.

[0036] It should be noted that the structure of the cover plate 1 is relatively complex. In the present application, the cover plate 1 is divided into an intermediate main body portion 11 and an outer ring connection portion 12. Thus, the intermediate main body portion 11 and the outer ring connection portion 12 can be injection-molded separately and then assembled with the housing 2, which is convenient for the processing and manufacturing of the cover plate 1 with a complex structure.

[0037] The injection-molded intermediate main body portion 11 is snap-fitted and connected to the upper end surface of the housing 2 to form a primary seal. The specific snap-fitting structure can adopt the cooperation of a snap and a slot or other snap-fitting structures, which is not unique, as long as the intermediate main body portion 11 is tightly snap-fitted with the upper end surface of the housing 2.

[0038] The injection-molded outer ring connection portion 12 is two-shot injected onto the outside of the housing 2 and the intermediate main body portion 11, so that the outer ring connection portion 12 is integrated with the housing 2 and the intermediate main body portion 11 and seals the housing 2 and the intermediate main body portion 11 to form a secondary seal.

[0039] The above connection structure between the cover plate and the housing divides the cover plate 1 with a complex structure into an intermediate main body portion 11 and an outer ring connection portion 12. The intermediate main body portion 11 is snap-fitted on the upper end surface of the housing 2 to form a primary seal, and the outer ring connection portion 12 is integrated with the outside of the intermediate main body portion 11 and the outside of the housing 2 by two-shot injection to form a secondary seal. Therefore, the present application has the following beneficial effects: First, a two-stage seal structure is formed between the cover plate 1 and the housing 2, which can improve the airtightness of the connection between the cover plate 1 and the housing 2; Second, by dividing the cover plate 1 with a complex structure into two parts and connecting them to the upper end surface of the housing 2 respectively, it is not only convenient for the processing and manufacturing of the cover plate 1, but also can improve the reliability of the connection between the cover plate 1 and the housing 2; Third, the two-shot injection connection has better processing accuracy and quality than welding, and it is easier to ensure the tight connection between the cover plate 1 and the housing 2, thereby improving the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0040] Based on the above embodiments, please refer to Figure 2 , a convex ring 3 is provided on the upper end surface of the housing 2. The upper end surface of the convex ring 3, the inner peripheral surface of the convex ring 3, and the upper end surface of the housing 2 located inside the convex ring 3 are all in contact with the middle main body portion 11. The outer peripheral surface of the convex ring 3, the outer peripheral surface of the middle main body portion 11, and the upper end surface of the housing 2 located outside the convex ring 3 are all in contact with the outer ring connecting portion 12.

[0041] Therefore, by providing the convex ring 3 on the upper end surface of the housing 2, the contact area between the housing 2 and the middle main body portion 11 and the outer ring connecting portion 12 can be increased, so as to more effectively ensure the tight connection between the cover plate 1 and the housing 2, and further improve the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0042] Further preferably, please refer to Figure 2 , the outer peripheral surface of the middle main body portion 11 is provided as a conical table surface that gradually slopes outward from top to bottom.

[0043] Therefore, the middle main body portion 11 has a structure that is narrower at the top and wider at the bottom, which can not only better support the outer ring connecting portion 12, but also increase the contact area with the outer ring connecting portion 12, thus further improving the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0044] Considering the specific buckling method between the middle main body portion 11 and the housing 2, based on the above embodiments, please refer to Figure 2 and Figure 3 , the middle main body portion 11 includes a conical portion and a buckling portion that are integrally provided from top to bottom. The buckling portion is buckled and connected to the convex ring 3 provided on the upper end surface of the housing 2. The outer diameter of the conical portion gradually increases from top to bottom, and the lower end surface of the conical portion presses against the upper end surface of the convex ring 3.

[0045] Specifically, an annular groove is formed between the inner peripheral surface of the convex ring 3 and the upper end surface of the housing 2. The buckling portion is adapted to the shape of the annular groove and is buckled in the annular groove. The conical portion and the buckling portion are integrally connected and placed above the buckling portion, and the lower end surface of the conical portion presses against the upper end surface of the convex ring 3. Thus, the conical portion is in close contact with the upper end surface of the convex ring 3, and the buckling portion is in close contact with the inner peripheral surface of the convex ring 3, which can ensure the tight connection between the middle main body portion 11 and the housing 2 and is beneficial to improving the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0046] It should be noted that the outer ring connecting portion 12 is injection-molded onto the outer peripheral surfaces of the convex ring 3 and the conical portion. The outer diameter of the conical portion gradually increases from top to bottom, which can not only better support the outer ring connecting portion 12, but also increase the contact area with the outer ring connecting portion 12, thus further improving the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0047] Based on the above embodiments, please refer toFigure 2 The contour line of the outer peripheral surface of the middle main body portion 11 is the first toothed line, and the contour line of the inner peripheral surface of the outer ring connecting portion 12 corresponding to the position of the middle main body portion 11 is the second toothed line, and the first toothed line and the second toothed line are engaged with each other.

[0048] Therefore, the outer peripheral surface of the middle main body portion 11 and the inner peripheral surface of the outer ring connecting portion 12 corresponding thereto are in contact and cooperation through the tooth structure, which can enhance the bonding strength between the middle main body portion 11 and the outer ring connecting portion 12, and can also further improve the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0049] Further preferably, if the outer peripheral surface of the middle main body portion 11 is a tapered table surface that gradually slopes outward from top to bottom, or the upper portion of the middle main body portion 11 is a tapered portion with an outer diameter gradually increasing from top to bottom, in order to facilitate the engagement connection between the middle main body portion 11 and the outer ring connecting portion 12 through the tooth structure, the first toothed line is set as a triangular serrated line, and correspondingly, the second toothed line is also set as a triangular serrated line.

[0050] On the basis of the above embodiments, please refer to Figure 2 The contour line of the outer peripheral surface of the convex ring 3 is the third toothed line, and the contour line of the inner peripheral surface of the outer ring connecting portion 12 corresponding to the position of the convex ring 3 is the fourth toothed line, and the third toothed line and the fourth toothed line are engaged with each other.

[0051] Therefore, the outer peripheral surface of the convex ring 3 and the inner peripheral surface of the outer ring connecting portion 12 corresponding thereto are in contact and cooperation through the tooth structure, which can enhance the bonding strength between the convex ring 3 and the outer ring connecting portion 12, that is, enhance the bonding strength between the housing 2 and the outer ring connecting portion 12, and can also further improve the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0052] Further preferably, the third toothed line is a rectangular toothed line, which can play a role of limiting the up and down movement of the outer ring connecting portion 12, thereby preventing the outer ring connecting portion 12 from moving up and down, and is also beneficial to improving the reliability and airtightness of the connection between the cover plate 1 and the housing 2.

[0053] On the basis of any of the above embodiments, please refer to Figure 2 The upper end of the housing 2 is provided with an outward flange 21, and the flange 21 is in contact with the outer ring connecting portion 12.

[0054] It can be understood that the flange 21 can increase the thickness of the upper end surface of the housing 2. The upper end surface of the flange 21 is in contact with the lower end surface of the outer ring connecting portion 12, which is not only more convenient for the connection between the outer ring connecting portion 12 and the housing 2, but also increases the contact area between the outer ring connecting portion 12 and the housing 2. Therefore, the flange 21 facilitates the secondary injection molding connection between the outer ring connecting portion 12 and the housing 2, and at the same time ensures the tight connection between the outer ring connecting portion 12 and the housing 2.

[0055] In addition to the above-mentioned connection structure between the cover plate and the housing, please refer to Figure 5 , the present utility model also provides an air dryer including the connection structure between the cover plate and the housing disclosed in the above embodiment. For the structures of other parts of the air dryer, please refer to the prior art and will not be elaborated herein.

[0056] In this specification, each embodiment is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the embodiments, reference can be made to each other.

[0057] The above has introduced in detail a connection structure between a cover plate and a housing and an air dryer provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A connection structure between a cover plate and a housing, characterized in that It includes a housing (2) and a cover plate (1). The cover plate (1) includes an intermediate main body portion (11) and an outer ring connecting portion (12). The lower part of the intermediate main body portion (11) is snap-fitted inside the housing (2), and the outer ring connecting portion (12) is located outside the housing (2) and the intermediate main body portion (11) and forms an overmolded integral part with the two.

2. The cover plate and housing connection structure according to claim 1, characterized in that, The upper end surface of the housing (2) is provided with a convex ring (3). The upper end surface of the convex ring (3), the inner peripheral surface of the convex ring (3), and the upper end surface of the housing (2) located inside the convex ring (3) are all in contact with the intermediate main body portion (11). The outer peripheral surface of the convex ring (3), the outer peripheral surface of the intermediate main body portion (11), and the upper end surface of the housing (2) located outside the convex ring (3) are all in contact with the outer ring connecting portion (12).

3. The cover plate and housing connection structure according to claim 1, characterized in that, The outer peripheral surface of the intermediate main body portion (11) is arranged as a conical table surface that gradually slopes outward from top to bottom.

4. The cover plate and housing connection structure according to claim 1, characterized in that, The intermediate main body portion (11) includes a conical portion and a snap-fitting portion integrally provided from top to bottom. The snap-fitting portion is snap-fitted and connected to the convex ring (3) provided on the upper end surface of the housing (2). The outer diameter of the conical portion gradually increases from top to bottom, and the lower end surface of the conical portion presses against the upper end surface of the convex ring (3).

5. The cover plate and housing connection structure according to any one of claims 1 to 4, characterized in that, The contour line of the outer peripheral surface of the intermediate main body portion (11) is a first toothed line, and the contour line of the inner peripheral surface of the outer ring connecting portion (12) corresponding to the position of the intermediate main body portion (11) is a second toothed line. The first toothed line and the second toothed line engage with each other.

6. The connection structure between the cover plate and the housing according to claim 5, characterized in that, The first toothed line is a triangular serrated line.

7. The cover plate and housing connection structure according to claim 2 or 4, characterized in that, The contour line of the outer peripheral surface of the convex ring (3) is a third toothed line, and the contour line of the inner peripheral surface of the outer ring connecting portion (12) corresponding to the position of the convex ring (3) is a fourth toothed line. The third toothed line and the fourth toothed line engage with each other.

8. The cover plate and housing connection structure according to claim 7, wherein, The third toothed line is a rectangular toothed line.

9. The cover plate and housing connection structure according to any one of claims 1 to 4, characterized in that The upper end of the housing (2) is provided with an outward flange (21), and the flange (21) is in contact with the outer ring connecting portion (12).

10. An air dryer, characterized in that, It includes the cover plate and housing connection structure according to any one of claims 1 to 9 above.

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