A driving motor sealing structure

Abstract

The utility model discloses a kind of driving motor sealing structure, belong to new energy automobile technical field, to solve the stiffness of existing driving motor big cover plate sealing exists, sealing is difficult, easily affected by assembly error, high cost and assembly inconvenient and other problems.The structure includes the cover plate and the counterhand piece of stamping manufacturing, cover plate inboard has the sealing gasket with gap, the counterhand piece is equipped with continuous sealing surface and multiple boss higher than sealing surface, boss height is less than sealing gasket thickness, and is equipped with bolt hole.Assembly time, sealing gasket and counterhand piece sealing surface contact, cover plate metal surface and boss top surface contact, by bolt locking.Its sealing area and locking area do not interfere with each other, contact area is big, not affected by assembly error, effective area utilization is high, and structure is simple, easy to assemble, relatively low in cost.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, specifically to a sealing structure for a drive motor, used to achieve a reliable seal between the cover plate and the opposing component (such as the end cover) in the drive motor, thereby improving the stability and reliability of electric drive products. Background Technology

[0002] Against the backdrop of the rapid development of new energy vehicles, the drive motor, as the core component of the electric drive system, operates in a complex and ever-changing environment, often facing challenges such as vibration, temperature fluctuations, moisture and dust erosion. Therefore, sealing performance has become a key factor in ensuring the long-term stable operation of the motor, which is directly related to the reliability, service life and user experience of electric drive products. The market's requirements for its sealing performance are becoming increasingly stringent.

[0003] Currently, drive motors often require large-area cover plates to seal their internal structure, in order to isolate external impurities and maintain stable internal operating conditions. However, these large-area cover plates are often limited by design and manufacturing processes, and are mostly thin-structured, resulting in insufficient rigidity. Under the vibration generated by motor operation or assembly stress, they are prone to deformation, which in turn damages the sealing effect.

[0004] Meanwhile, the existing sealing design of large cover plates has many bottlenecks: on the one hand, traditional sealing methods (such as lip seals) have limited contact area, poor sealing reliability, and are easily affected by positional deviations and angular errors generated during assembly, leading to sealing failure; on the other hand, the sealing area and the bolt locking area often overlap or interfere with each other. When the cover plate is locked to the other part (such as the end cap) by bolts, the locking force is easily applied directly to the sealing structure, causing uneven deformation or local damage to the sealing element. This not only reduces the usable space of the effective sealing area, but also increases the complexity of the sealing design.

[0005] In addition, existing sealing structures often require additional complex positioning or buffering structures to avoid the above problems. This not only increases the requirements for the precision of parts processing and manufacturing costs, but also increases the assembly steps and difficulty, which is not conducive to improving efficiency in mass production. This is in significant conflict with the production requirements of the new energy vehicle industry for low cost, high reliability and easy assembly. Summary of the Invention

[0006] This utility model aims to solve the following problems existing in the sealing structure of the large cover plate of the drive motor: poor rigidity of the large cover plate; difficult sealing, easily affected by assembly errors; interference between the sealing area and the locking area, resulting in low utilization of the effective area; complex sealing structure, inconvenient assembly and high cost.

[0007] The technical solution adopted by this utility model is as follows: a sealing structure for a drive motor, including a cover plate with a sealing gasket and a matching component. The cover plate is a stamped structure, and the sealing gasket is pasted on the side of the cover plate facing the matching component. The matching component has a continuously arranged sealing surface, and multiple bosses are distributed on the sealing surface. The top surface of the bosses is higher than the sealing surface, and bolt holes are opened on the bosses. When the cover plate and the matching component are assembled, the sealing gasket is in close contact with the sealing surface, the metal surface of the cover plate is in close contact with the top surface of the bosses, and the cover plate and the matching component are locked and fixed by bolts passing through the bolt holes.

[0008] Furthermore, the thickness of the sealing gasket is greater than the height difference between the top surface of the boss and the sealing surface.

[0009] Furthermore, the sealing gasket has a notch corresponding to the boss position of the counterslip, and the notch is used to avoid the boss.

[0010] Furthermore, the sealing gasket is made of rubber and is attached to the surface of the cover plate with adhesive.

[0011] Furthermore, the plurality of bosses are spaced apart along the contour of the sealing surface of the fitting.

[0012] Furthermore, the cover plate has a flanged edge.

[0013] Furthermore, the aforementioned component is the end cap of the drive motor.

[0014] The beneficial effects of this utility model are:

[0015] 1. More reliable sealing performance: The sealing gasket contacts the continuous sealing surface of the joint, which has a larger contact area and better sealing effect compared with the traditional lip seal; and the sealing area and the locking area (the part where the boss is connected to the bolt) do not interfere with each other, avoiding the influence of the locking process on the sealing area and not being affected by assembly errors.

[0016] 2. High utilization rate of effective area: By separating the sealing area from the locking area, the effective contact area between the cover plate and the hand part can be maximized, improving the structural compactness.

[0017] 3. Easy assembly and low cost: The cover plate is made by stamping, which is simple and low cost; the sealing gasket is directly glued to the cover plate. During assembly, it is only necessary to align the boss and bolt holes to complete the connection. There is no need for complicated sealing operations, which helps to simplify the assembly process and reduce labor costs.

[0018] 4. Improved structural stability: The rigidity of the stamped cover plate is superior to that of traditional thin cover plates. Combined with the locking method of bosses and bolts, the overall structural stability can be improved. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the assembly structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cover plate in this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the hand component in this utility model;

[0022] In the diagram: 1-cover plate, 2-hand fitting, 3-sealing gasket, 4-flanged edge, 5-bolt hole, 6-bore, 7-sealing surface, 8-notch. Detailed Implementation

[0023] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of this utility model, a more detailed description of this utility model will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, this utility model is a sealing structure for a drive motor, including a cover plate 1 and a matching part 2. The cover plate is manufactured using a stamping process. Compared with traditional thin cover plates, stamping can significantly improve the structural rigidity of the cover plate, effectively solving the problem of large-area cover plates easily deforming due to insufficient rigidity. At the same time, the stamping process is simple to operate, has low manufacturing cost, and is conducive to mass production. Figure 2 As shown, a single piece of rubber sealing gasket 3 is glued to the inner side (sealing side) of the cover plate 1 facing the opponent 2 using high-temperature resistant adhesive. The shape of the sealing gasket 3 perfectly matches the continuous sealing surface 7 of the opponent 2, and multiple notches 8 are pre-cut at the positions corresponding to the boss 6 of the opponent 2. The notches 8 are designed to precisely avoid the boss 6 on the opponent 2, ensuring that the sealing gasket 3 will not interfere with the boss 6 during assembly. This ensures that the sealing gasket 3 can fully fit with the sealing surface 7 of the opponent 2, maximizing the sealing contact area and significantly improving sealing reliability compared to traditional lip seals. The edge of the cover plate 1 is integrally formed with a flange 4 structure. The flange 4 is set along the outer periphery of the cover plate 1, which not only enhances the overall structural rigidity of the cover plate, especially for large-area cover plates, effectively offsetting the problem of easy deformation of thin structures, but also plays an auxiliary positioning role during assembly, ensuring that the fit between the cover plate 1 and the opponent 2 is accurate and reducing assembly deviation.

[0025] like Figure 3As shown, the sealing surface 7 of the handpiece (such as the end cap) is precision machined to form a continuous plane, and multiple small protrusions 6 are evenly distributed along the cover plate contour of the sealing surface 7. The top surface of the protrusion 6 is higher than the sealing surface 7, and the height of the protrusion 6 is strictly controlled within a range less than the thickness of the sealing gasket 3. This design ensures that when the bolts are tightened, the sealing gasket 3 can be fully compressed and undergo moderate deformation, so that the sealing gasket 3 and the sealing surface 7 fit tightly together to form a reliable seal; at the same time, bolt holes 5 are provided on the protrusion 6 for connection with the cover plate 1 by bolts.

[0026] During assembly, the flange 4 on the edge of the cover plate 2 mates with the corresponding edge of the opposing part 1, quickly achieving initial positioning. Then, the cover plate 1 with the sealing gasket 3 is aligned with the opposing part 2, so that the sealing gasket 3 adheres to the continuous sealing surface 7 of the opposing part 1, and the metal surface of the cover plate 1 adheres to the top surface of the boss 6. The bolts are then inserted into the bolt holes 5 of the boss and tightened to complete the locking process. During this process, the contact between the metal surface of the cover plate and the top surface of the boss provides stable support for locking. The tightening force of the bolts acts only on the boss area, while the contact between the sealing gasket 3 and the sealing surface 7 forms an independent sealing area. The two do not interfere with each other. This separation design avoids squeezing or damage to the sealing area during the locking process, completely solving the problem of interference between the sealing and locking areas in traditional structures. Furthermore, it is unaffected by minor positional deviations during assembly, significantly improving the assembly error tolerance.

[0027] Furthermore, by separating the sealing area (the part where the gasket contacts the sealing surface) and the locking area (the part where the boss connects to the bolt), the effective contact area between the cover plate and the matching parts can be maximized, making the overall structure more compact. The assembly method of directly attaching the gasket to the cover plate with adhesive eliminates the need for a complex positioning structure, simplifies the assembly process, and further reduces assembly costs.

[0028] In summary, this embodiment achieves the beneficial effects of reliable sealing, easy assembly, low cost, and high effective area utilization through structural designs such as stamping cover plate to increase rigidity, sealing gasket contact with continuous sealing surface to expand sealing area, and boss and sealing gasket thickness matching to achieve area separation. It is suitable for sealing scenarios of drive motors in new energy vehicles.

Claims

1. A sealing structure for a drive motor, comprising a cover plate (1) and a counterslip (2), characterized in that: The cover plate (1) is a stamped structure, and a sealing gasket (3) is pasted on the side of the cover plate (1) facing the opponent (2); the opponent (2) has a continuously arranged sealing surface (7), and multiple bosses (6) are distributed on the sealing surface (7). The top surface of the boss (6) is higher than the sealing surface (7), and bolt holes (5) are opened on the boss (6); when the cover plate (1) and the opponent (2) are assembled, the sealing gasket (3) is in contact with the sealing surface (7), the metal surface of the cover plate (1) is in contact with the top surface of the boss (6), and the cover plate (1) and the opponent (2) are locked and fixed by bolts passing through the bolt holes (5).

2. The drive motor sealing structure according to claim 1, characterized in that: The thickness of the sealing gasket (3) is greater than the height difference between the top surface of the boss (6) and the sealing surface (7).

3. The drive motor sealing structure according to claim 1, characterized in that: The sealing gasket (3) has a notch (8) at the position corresponding to the boss (6) of the opposite part, and the notch (8) is used to avoid the boss (6).

4. The drive motor sealing structure according to claim 1, characterized in that: The sealing gasket (3) is made of rubber and is glued to the surface of the cover plate (1).

5. The drive motor sealing structure according to claim 1, characterized in that: The plurality of bosses (6) are distributed at intervals along the contour of the sealing surface (7) of the counterpiece (2).

6. The drive motor sealing structure according to claim 1, characterized in that: The cover plate (1) has a flange (4) on its edge.

7. The drive motor sealing structure according to claim 1, characterized in that: The aforementioned component (2) is the end cap of the drive motor.

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