A multi-seal structure

Abstract

This utility model discloses a multi-layer sealing structure. The multi-layer sealing structure includes an upper cover plate and a lower cover plate. The lower cover plate has a first annular groove on its edge, and the upper cover plate has a first annular boss on its edge that inserts into the first annular groove. A second annular groove is formed in the center of the bottom surface of the first annular groove, and a second annular boss is formed on the top surface of the first annular boss that inserts into the second annular groove. Third annular grooves are formed on both sides of the second annular groove to collect sealant overflowing from it. This utility model solves the problem of difficulty in controlling the amount of sealant injected in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to a multi-layer sealing structure. Background Technology

[0002] The housing of a brushless motor controller consists of an upper cover and a lower cover, and its waterproof rating is required to be IP67. Currently, this requirement is achieved by injecting sealant into the sealing groove between the upper and lower covers. However, both the upper and lower covers are cast iron, resulting in low dimensional accuracy. This makes it difficult to control the amount of sealant injected. If the amount of sealant injected is relatively small, air and water leaks are likely to occur, failing to meet the requirements. If the amount of sealant injected is relatively large, the excess sealant will overflow from the sealing groove. Sealant flowing to the outside of the housing increases the amount of wiping work, while sealant flowing to the inside of the housing cannot be handled and risks damaging the internal components. Utility Model Content

[0003] The purpose of this invention is to provide a multi-layered sealing structure that can both ensure a sealing effect and prevent sealant overflow.

[0004] To achieve the above-mentioned objectives, the multi-seal structure of this utility model adopts the following technical solution:

[0005] A multi-seal structure includes an upper cover plate and a lower cover plate. The lower cover plate has a first annular groove on its edge, and the upper cover plate has a first annular boss on its edge that inserts into the first annular groove. A second annular groove is formed in the middle of the bottom surface of the first annular groove. A second annular boss is formed on the top surface of the first annular boss that inserts into the second annular groove. Third annular grooves are formed on both sides of the second annular groove to contain sealant overflowing from the second annular groove.

[0006] Preferably, a gap is left between the sidewall of the first annular boss and the sidewall of the first annular groove.

[0007] Preferably, the third annular groove communicates with the gap.

[0008] Preferably, the cross-section of the first annular boss is inverted V-shape.

[0009] Preferably, the cross-section of the second annular groove is inverted V-shape.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] A measured amount of sealant is injected into the second annular groove. When the first annular boss is inserted into the first annular groove, the second annular boss is inserted into the second annular groove, forcing excess sealant in the second annular groove to overflow. This ensures that the sealant in the second annular groove is fully filled, thereby ensuring the sealing effect between the upper and lower cover plates. The overflowing sealant flows into the third annular groove, which not only saves the work of wiping the overflowing sealant, but also eliminates the risk of damage to the internal components of the housing due to the overflowing sealant. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the multi-sealing structure of this utility model.

[0013] Among them, 1 is the upper cover plate, 11 is the first annular boss, 12 is the second annular boss, 2 is the lower cover plate, 21 is the first annular groove, 22 is the second annular groove, 23 is the third annular groove, and 3 is the gap. Detailed Implementation

[0014] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0015] like Figure 1 As shown, a multi-seal structure includes an upper cover plate 1 and a lower cover plate 2. Both covers are castings. A first annular groove 21 is formed on the edge of the lower cover plate. A first annular boss 11, integrally formed on the edge of the upper cover plate, is inserted into the first annular groove. A gap 3 is left between the sidewall of the first annular boss and the sidewall of the first annular groove. Due to the poor dimensional accuracy of the castings, the width of the first annular boss is smaller than the width of the first annular groove to ensure that the first annular boss can be inserted into the first annular groove. A second annular groove 22 is formed in the middle of the bottom surface of the first annular groove. The cross-section of the second annular groove is inverted V-shape to facilitate the application of excess sealant within the second annular groove. The first annular boss is integrally formed with the top surface of the first annular boss and inserted into the second annular groove. The second annular groove has third annular grooves 23 on both sides to accommodate the sealant overflowing from the second annular groove. The third annular groove is located at the intersection of the bottom surface and the side wall of the first annular groove. After communicating with the gap, it can increase the capacity of the third annular groove and prevent the sealant from overflowing from the shell. The cross-section of the first annular boss is inverted V-shape, that is, the two sides of the first annular boss are provided with slopes, which can not only further increase the capacity of the third annular groove, but also compact the sealant in the third annular groove to ensure the sealing effect at the third annular groove.

[0016] The specific working process and principle of this utility model are as follows: Although the dimensional accuracy of the casting is not high, it will not differ too much. Therefore, an appropriate amount of sealant can be set based on experience. During assembly, the first annular boss is inserted into the first annular groove from above. After the second annular boss is inserted into the second annular groove, it compacts the sealant in the second annular groove. Excess sealant in the second annular groove overflows to both sides and flows into the third annular groove. After the sealant fills the third annular groove, it will flow into the gap. At this time, under the action of the slope of the first annular boss, the sealant in the third annular groove can be compacted. This utility model forms a multi-layer waterproof sealing structure by opening a second annular groove on the bottom surface of the first annular groove and opening third annular grooves on both sides of the second annular groove. This improves the sealing effect of the shell and prevents the sealant from overflowing into the shell, eliminating the need to wipe off the overflowing sealant and eliminating the risk of damage to the internal components of the shell due to the overflowing sealant.

[0017] The detailed description listed above is merely a specific description of feasible implementation methods of this utility model and is not intended to limit the scope of protection of this utility model.

Claims

1. A multi-seal structure, characterized in that: The device includes an upper cover plate and a lower cover plate. The lower cover plate has a first annular groove on its edge, and the upper cover plate has a first annular boss on its edge that inserts into the first annular groove. The bottom surface of the first annular groove has a second annular groove in the middle. The top surface of the first annular boss has a second annular boss that inserts into the second annular groove. The two sides of the second annular groove have third annular grooves for accommodating sealant overflowing from the second annular groove.

2. The multi-seal structure according to claim 1, characterized in that: A gap is left between the sidewall of the first annular boss and the sidewall of the first annular groove.

3. The multi-seal structure according to claim 2, characterized in that: The third annular groove is connected to the gap.

4. The multi-seal structure according to claim 3, characterized in that: The cross-section of the first annular boss is inverted V-shape.

5. The multi-seal structure according to claim 1, characterized in that: The cross-section of the second annular groove is inverted V-shape.

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