An end cap structure and a motor

Abstract

This invention provides an end cap structure and a motor. The end cap structure includes an end cap body and a water-blocking component. Taking the longitudinal section of the end cap body as its projection plane, a sealed chamber is formed in the side wall of the end cap body. One end of the water-blocking component is connected to a rotating shaft, and the other end extends into the sealed chamber. A drain hole is also formed on the side wall of the end cap body. One end of the drain hole communicates with the sealed chamber, and the other end penetrates the outer peripheral wall of the end cap body. In this invention, the drain hole provides an effective drainage channel for accumulated water, allowing it to drain from the end cap body, thereby preventing the continuous accumulation of water in the sealed chamber and preventing water from entering the motor.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to an end cover structure and a motor. Background Technology

[0002] The prior art discloses an end cap structure. When the motor is installed horizontally, a U-shaped structure is formed at the bottom of the annular sealing groove, and the outer peripheral wall of the sealing structure is in clearance fit with the bottom wall of the sealing groove. When water enters the gap between the sealing structure and the sealing groove along the motor shaft, it will remain in this U-shaped structure. When the water volume exceeds a certain amount, it will overflow the inner wall of the right side of the sealing groove and enter the motor. Therefore, this end cap structure can only prevent the waterproof cover from rubbing off the edge, but it cannot achieve a good waterproof effect. Utility Model Content

[0003] This utility model provides an end cap structure and a motor, which can solve the technical problem that the existing end cap structure can only prevent the waterproof cover from rubbing off the edge, but the waterproof effect is poor.

[0004] This utility model provides an end cap structure, which includes an end cap body and a water-blocking component;

[0005] With the longitudinal section of the end cap body as the projection plane, a sealed chamber is provided in the side wall of the end cap body. One end of the water-blocking member is connected to the rotating shaft, and the other end of the water-blocking member extends into the sealed chamber.

[0006] A drainage hole is also provided on the side wall of the end cap body. One end of the drainage hole is connected to the sealing chamber, and the other end of the drainage hole penetrates the outer peripheral wall of the end cap body.

[0007] In some embodiments, the drain hole is located radially outside the sealed chamber and communicates with the bottom of the sealed chamber.

[0008] In some embodiments, with the longitudinal section of the end cap body as the projection plane, the end cap body forms an outer wall on the axially outer side of the sealing chamber, and an inner wall on the axially inner side of the sealing chamber. The outer wall has a first through hole, and the inner wall has a second through hole. The radius of the first through hole is larger than the radius of the second through hole.

[0009] In some embodiments, there is a height difference between the radial outer edge of the first through hole and the radial outer edge of the second through hole, the height difference being H, and the height difference H satisfies: H>2mm.

[0010] In some embodiments, the water-blocking element is a water-blocking plate, and there is a rotational gap between the radial outer edge of the water-blocking element and the outer edge wall of the sealing chamber. The rotational gap is used to prevent the water-blocking element from contacting the end cap body; the axial thickness of the water-blocking element is less than the vertical distance between the outer side wall and the inner side wall.

[0011] In some embodiments, the end face of the water-blocking member facing the outer wall has a protrusion for throwing water to the drain hole.

[0012] In some embodiments, the end face of the water-blocking member is provided with a plurality of protrusions in the circumferential direction, the water-blocking member is provided with a shaft hole, one end of the protrusion extends into the shaft hole, and the other end of the protrusion extends into the radial outer edge of the water-blocking member.

[0013] In some embodiments, the protrusion is arc-shaped, and the bending direction of the protrusion matches the rotation direction of the shaft.

[0014] In some embodiments, the rotating shaft passes through the sealed chamber, and a sealing gap is provided between the second through hole and the outer wall of the rotating shaft, wherein a sealing element is provided in the sealing gap.

[0015] In some embodiments, the second through hole is provided with a first groove, the outer wall of the rotating shaft is provided with a second groove, a portion of the wall of the seal is installed in the first groove, and another portion of the wall of the seal is installed in the second groove.

[0016] An electric motor includes an end cover structure, wherein the end cover structure is the end cover structure described above.

[0017] The end cap structure and motor provided by this utility model have the following beneficial effects:

[0018] In this invention, water droplets within the sealed chamber are prevented from entering the motor in large quantities due to the obstruction of the water-blocking component. The drain hole provides an effective drainage channel for this accumulated water. When the water droplets accumulate to a certain level within the sealed chamber, they will naturally flow towards the drain hole under the action of gravity or centrifugal force and be discharged from the end cover body through the drain hole, thus preventing the continuous accumulation of water within the sealed chamber. The drain hole also helps maintain the pressure balance within the sealed chamber, preventing water from flowing back into the motor due to changes in external air pressure. In different operating environments, the motor faces varying degrees of water intrusion risk. The drain hole allows the end cover structure to better adapt to various complex operating conditions, improving the reliability and adaptability of the motor. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the end cap structure according to an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the end cap body according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the outer and inner sidewalls of an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the sealing element according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the protrusion in an embodiment of the present invention.

[0025] Attached Figure: 1-End cap body; 101-Drain hole; 102-Outer side wall; 121-First through hole; 103-Inner side wall; 131-Second through hole; 132-First groove; 2-Water baffle; 201-Protrusion; 202-Shaft hole; 3-Sealing chamber; 4-Rotating shaft; 401-Second groove; 5-Sealing element. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.

[0029] See also Figures 1 to 5 As shown, an embodiment of the present invention provides an end cap structure, which includes an end cap body 1 and a water-blocking member 2. Taking the longitudinal section of the end cap body 1 as the projection plane, a sealing chamber 3 is provided in the side wall of the end cap body 1. One end of the water-blocking member 2 is connected to the rotating shaft 4, and the other end of the water-blocking member 2 extends into the sealing chamber 3. A drain hole 101 is also provided on the side wall of the end cap body 1. One end of the drain hole 101 communicates with the sealing chamber 3, and the other end of the drain hole 101 penetrates the outer peripheral wall of the end cap body 1.

[0030] Specifically, one end of the water-blocking component 2 is connected to the rotating shaft 4, and the other end of the water-blocking component 2 extends into the sealed chamber 3. When the rotating shaft 4 rotates, the rotating shaft 4 drives the water-blocking component 2 to rotate. When water droplets enter the sealed chamber 3 from the axial outer end face of the end cover body 1, they are blocked by the water-blocking component 2 in the axial direction and cannot enter the motor interior in large quantities. The water accumulates in the sealed chamber 3. Since one end of the drain hole 101 is connected to the sealed chamber 3 and the other end of the drain hole 101 penetrates the outer peripheral wall of the end cover body 1, the water will flow into the drain hole 101 and out of the end cover body 1 under the action of gravity or centrifugal force.

[0031] In this embodiment, water droplets in the sealed chamber 3 cannot enter the motor in large quantities due to the obstruction of the water-blocking component 2. The drain hole 101 provides an effective drainage channel for these accumulated water droplets. When the water droplets accumulate to a certain extent in the sealed chamber 3, they will naturally flow to the drain hole 101 under the action of gravity or centrifugal force and be discharged from the end cover body 1 through the drain hole 101, thereby avoiding the continuous accumulation of water in the sealed chamber 3. The drain hole 101 also helps to maintain the pressure balance in the sealed chamber 3 and prevents water from flowing back into the motor due to changes in external air pressure. In different operating environments, the motor may face different degrees of water intrusion risk. The drain hole 101 enables the end cover structure to better adapt to various complex working conditions, improving the reliability and adaptability of the motor.

[0032] In this embodiment, the sealed chamber 3 provides a dedicated accumulation space for moisture entering the end cover body 1. When water droplets enter from the axial outer end face of the end cover body 1, the sealed chamber 3 can temporarily contain this moisture. The sealed chamber 3 is isolated from the internal space of the motor by a water-blocking component 2. The blocking effect of the water-blocking component 2 prevents a large amount of moisture from entering the motor, thereby protecting the electrical components inside the motor. The rotation of the water-blocking component 2 not only blocks the flow of moisture into the motor, but also guides the moisture to a specific area of ​​the sealed chamber 3 through the centrifugal force generated by its rotation, facilitating the moisture to be discharged through the drain hole 101. When water droplets enter the sealed chamber 3 from the axial outer end face of the end cover body 1, the water-blocking component 2 blocks the flow of moisture into the motor during rotation, causing the moisture to accumulate in the sealed chamber 3. As the moisture increases, the pressure change in the sealed chamber 3 causes the moisture to be discharged through the drain hole 101. The rotation of the water-blocking component 2 not only blocks water but also throws it to the outside of the sealed chamber 3 through centrifugal force, further promoting the flow of water towards the drain hole 101. This centrifugal force generated by rotation, combined with the gravity drainage of the drain hole 101, ensures that water can be effectively discharged from the end cover body 1. The arrangement and layout of the drain hole 101, the sealed chamber 3, and the water-blocking component 2 work together to form a complete drainage system. The sealed chamber 3 provides space for water accumulation, the water-blocking component 2 blocks and guides the flow of water, and the drain hole 101 serves as the final drainage channel. The three components work together to achieve the waterproof and drainage functions of the motor.

[0033] It is worth noting that in this embodiment, the end cover structure is preferably used in motors. The end cover is installed on the end face of the motor housing, and the rotating shaft 4 passes through the end cover body 1. The drain hole 101 can drain the water accumulated in the sealed chamber 3 in a timely manner, preventing it from entering the motor. In other embodiments, if the end cover body 1 is provided with a sealed chamber 3, even without a water-blocking component 2, if water enters the sealed chamber 3, it can still be drained from the end cover body 1 through the drain hole 101.

[0034] See also Figures 1 to 2 As shown, the drain hole 101 is located on the radial outer side of the sealed chamber 3, and the drain hole 101 is connected to the bottom of the sealed chamber 3.

[0035] Specifically, the motor is placed horizontally, and the sealed chamber 3 is equivalent to forming an annular groove inside the side wall of the end cover body 1. The sealed chamber 3 has a certain length in the radial direction of the end cover body 1 for installing the water baffle 2. The rotating shaft 4 can pass through the sealed chamber 3. In order to better utilize the centrifugal force of the rotating shaft 4 and the flow of water under the action of gravity, one end of the drain hole 101 is connected to the bottom of the sealed chamber 3, and the other end of the drain hole 101 passes through the outer peripheral wall of the end cover body 1. The center line of the drain hole 101 extends vertically to the bottom of the sealed chamber 3. The optimal way is that the extension direction of the central axis of the sealed chamber 3 coincides with the central axis of the drain hole 101. In this way, when water gathers at the bottom of the sealed chamber 3, the water can flow out from the drain hole 101.

[0036] In this embodiment, since the drain hole 101 is located radially outside the sealed chamber 3 and communicates with the bottom, when the motor is placed horizontally, water will naturally gather towards the bottom in the sealed chamber 3. The connection between the drain hole 101 and the bottom allows water to flow smoothly into the drain hole 101 and drain out smoothly under gravity, preventing water from being difficult to drain or accumulating in the chamber due to improper location. When the shaft 4 rotates within the sealed chamber 3, it generates centrifugal force. The centerline of the drain hole 101 extends vertically to the bottom of the sealed chamber 3, with the optimal arrangement being that the centerlines coincide. This layout makes it easier for water to be thrown towards the bottom and outside of the sealed chamber 3 under centrifugal force, thus quickly draining through the drain hole 101 and improving drainage efficiency. One end of the drain hole 101 is connected to the bottom of the sealing chamber 3, and the other end penetrates the outer peripheral wall of the end cover body 1. This arrangement forms an annular groove-shaped sealing chamber 3 inside the side wall of the end cover body 1, and the drain hole 101 extends radially, making the entire structure compact and reasonable. It makes full use of the space inside the side wall of the end cover body 1, without interfering with other components of the motor, and also facilitates the overall miniaturization of the motor. The sealing chamber 3 has a certain length in the radial direction of the end cover body 1 for installing the water baffle 2, through which the rotating shaft 4 can pass. The arrangement of the drain hole 101 being connected to the bottom of the sealing chamber 3 does not affect the installation of the water baffle 2 or the rotation of the rotating shaft 4, ensuring good coordination between the components.

[0037] See also Figures 1 to 3As shown, with the longitudinal section of the end cap body 1 as the projection plane, the end cap body 1 has an outer wall 102 formed on the axial outer side of the sealing chamber 3, and an inner wall 103 formed on the axial inner side of the sealing chamber 3. The outer wall 102 has a first through hole 121, and the inner wall 103 has a second through hole 131. The radius of the first through hole 121 is larger than the radius of the second through hole 131.

[0038] Specifically, since the sealing chamber 3 is located inside the end cap body 1, rather than on its end face, this arrangement results in the end cap body 1 having an outer wall 102 on the axially outer side of the sealing chamber 3 and an inner wall 103 on the axially inner side of the sealing chamber 3. Because the radius of the first through hole 121 is relatively large, water droplets can relatively easily enter and flow into the sealing chamber 3. When water droplets enter the sealing chamber 3 from the outer end face of the end cap body 1 along the gap between the outer wall 102 and the rotating shaft 4, they accumulate within the sealing chamber 3. Due to the structural arrangement of the sealing chamber 3, the water droplets form a temporary water accumulation area within it. One end of the water-blocking component 2 is connected to the rotating shaft 4, and the other end extends into the sealed chamber 3. When the rotating shaft 4 rotates, the water-blocking component 2 rotates with the rotating shaft 4, preventing water droplets from flowing into the motor and preventing water droplets from entering the motor through the second through hole 131 of the inner wall 103. Due to the blocking effect of the water-blocking component 2, water droplets accumulate in the sealed chamber 3 and flow towards the drain hole 101 under the combined action of gravity and centrifugal force. One end of the drain hole 101 is connected to the bottom of the sealed chamber 3, and the other end penetrates the outer peripheral wall of the end cover body 1. Water droplets are discharged from the end cover body 1 through the drain hole 101.

[0039] In this embodiment, the first through hole 121 is located on the outer wall 102 of the end cap body 1. Its larger radius allows water droplets to enter the sealing chamber 3 from the axial outer end face of the end cap body 1. Because the first through hole 121 is relatively large, the pressure inside the sealing chamber 3 is relatively low after the water droplets enter. Conversely, the smaller second through hole 131 results in a relatively higher pressure inside the motor. This pressure difference helps push the water droplets to the bottom of the sealing chamber 3 and discharge them through the drain hole 101. The difference in radius between the first through hole 121 and the second through hole 131 helps form a gradual sealing structure. The larger first through hole 121 on the outer wall 102 allows water droplets to enter the sealing chamber 3, while the smaller second through hole 131 on the inner wall 103 forms a natural barrier, enhancing the sealing performance of the sealing chamber 3. By restricting the flow of water droplets into the motor, the second through hole 131 reduces the accumulation of water droplets inside the motor, lowering the risk of damage to internal motor components.

[0040] See also Figures 1 to 3As shown, there is a height difference H between the radial outer edge of the first through hole 121 and the radial outer edge of the second through hole 131. The height difference H satisfies: H>2mm.

[0041] In this embodiment, the height difference H forms a physical barrier, making it difficult for water droplets entering through the first through-hole 121 to directly cross to the second through-hole 131 and enter the motor. A larger height difference H > 2mm significantly increases the difficulty for water droplets to enter the motor. The presence of the height difference makes water droplets more likely to accumulate in the sealed chamber 3 rather than flow into the motor. This reduces the possibility of water droplets accumulating inside the motor and reduces the impact on motor performance. The presence of the height difference H makes the structure of the sealed chamber 3 more complex, enhancing the sealing performance. This structural design can better adapt to different working conditions and improve the sealing effect of the end cover. By increasing the height difference, the flow path of water droplets in the sealed chamber 3 is extended, reducing the risk of water droplets leaking into the motor through the second through-hole 131. The presence of the height difference H makes the structure of the end cover body 1 more reasonable and enhances its mechanical strength. This structural design helps to improve the durability of the end cover and extend its service life. By reasonably setting the height difference, the use of materials can be optimized while ensuring functionality, reducing unnecessary material waste.

[0042] See also Figures 1 to 3 As shown, the water baffle 2 is a water baffle plate. There is a rotation gap between the radial outer edge of the water baffle 2 and the outer edge wall of the sealing chamber 3. The rotation gap is used to prevent the water baffle 2 from contacting the end cap body 1. The axial thickness of the water baffle 2 is less than the vertical distance between the outer side wall 102 and the inner side wall 103.

[0043] In this embodiment, the rotation gap prevents the water-blocking component 2 from contacting the end cap body 1 during rotation, reducing wear and increasing the service life of both the water-blocking component 2 and the end cap body 1, ensuring long-term stable operation of the device. The rotation gap provides the necessary space for the water-blocking component 2 to rotate smoothly with the rotating shaft 4, thereby better fulfilling its function of blocking and guiding water flow. The axial thickness of the water-blocking component 2 is less than the vertical distance between the outer side wall 102 and the inner side wall 103, preventing interference between the water-blocking component 2 and the inner side wall 103 and outer side wall 102 of the end cap body 1 during movement, ensuring the normal operation of the entire device. The setting of the rotation gap and the control of the thickness of the water-blocking component 2 help optimize the water flow path in the sealing chamber 3, making it easier for water droplets to accumulate at the bottom of the sealing chamber 3 and flow to the drain hole 101, thereby improving the overall sealing and drainage effect.

[0044] See also Figures 1 to 5 As shown, the end face of the water-blocking member 2 facing the outer wall 102 is provided with a protrusion 201, which is used to throw water to the drain hole 101.

[0045] Specifically, water droplets enter the sealing chamber 3 through the first through hole 121 from the axial outer end face of the end cap body 1. Due to the large radius of the first through hole 121, the water droplets can smoothly enter the sealing chamber 3. The water droplets entering the sealing chamber 3 accumulate inside the sealing chamber 3, forming a temporary water accumulation area. Due to the structural design of the sealing chamber 3, the water droplets gradually accumulate inside the chamber. One end of the water baffle 2 (water baffle plate) is connected to the rotating shaft 4, and the other end extends into the sealing chamber 3. When the rotating shaft 4 rotates, the water baffle 2 rotates with the rotating shaft 4. There is a rotational gap between the radial outer edge of the water baffle 2 and the outer wall of the sealing chamber 3, ensuring that the water baffle 2 will not contact the end cap body 1 during rotation, thus ensuring the flexibility and stability of the movement. The end face of the water-blocking component 2 facing the outer wall 102 is provided with a protrusion 201. When the water-blocking component 2 rotates, the protrusion 201 throws water droplets toward the outer wall 102 of the sealed chamber 3 under the action of centrifugal force. Due to the shape and position of the protrusion 201, the water droplets are effectively guided to the bottom of the sealed chamber 3 and flow toward the drain hole 101.

[0046] In this embodiment, when the rotating shaft 4 drives the water-blocking component 2 to rotate, the protrusion 201, under the action of centrifugal force, throws water droplets from the sealed chamber 3 towards the outer wall 102. This centrifugal force allows the water droplets to be quickly thrown out of the sealed chamber 3, improving drainage efficiency. The shape and position of the protrusion 201 ensure that the water droplets are thrown towards the outer wall 102 of the sealed chamber 3 and flow towards the bottom along the outer wall 102. This guiding effect ensures that the water droplets can flow smoothly to the drain hole 101, avoiding random flow and accumulation of water droplets in the sealed chamber 3. The water-blocking component 2 itself serves to prevent water droplets from entering the motor, and the protrusion 201 further enhances this blocking effect. By throwing the water droplets towards the outer wall 102, the protrusion 201 reduces the adhesion of water droplets to the surface of the water-blocking component 2, reducing the risk of water droplets entering the motor through the gap between the water-blocking component 2 and the sealed chamber 3. The protrusion 201 prevents water droplets from accumulating in the sealed chamber 3, instead quickly throwing them towards the drain hole 101 and discharging them. This design reduces the residence time of water droplets in the sealed chamber 3, reducing the possibility of water droplets entering the motor through other means. The protrusion 201 throws the water droplets towards the outer wall 102 and guides them to the drain hole 101, forming an orderly water flow path. This orderly flow path helps improve the reliability of drainage, ensuring that water droplets can be effectively discharged from the end cover body 1. The protrusion 201 reduces the resistance encountered by the water droplets during flow, making the water flow smoother. This optimized water flow path reduces eddies and backflow phenomena in the sealed chamber 3, improving drainage efficiency. The synergistic effect of the protrusion 201, the water-blocking component 2, and the drain hole 101 forms a multi-layered protection mechanism. The protrusion 201 throws water droplets towards the outer wall 102, the water-blocking component 2 prevents water droplets from entering the motor, and the drain hole 101 promptly discharges the water droplets. This multi-layered protection mechanism significantly improves the motor's waterproof performance. In different operating environments, the motor may face varying degrees of water intrusion risk. The protrusion 201 allows the end cover structure to better adapt to these complex environments, improving the motor's reliability and stability under various operating conditions.

[0047] See also Figures 1 to 5 As shown, the end face of the water-blocking member 2 is provided with a plurality of protrusions 201 in the circumferential direction. The water-blocking member 2 is provided with a shaft hole 202. One end of the protrusion 201 extends toward the shaft hole 202, and the other end of the protrusion 201 extends toward the radial outer edge of the water-blocking member 2.

[0048] In this embodiment, multiple protrusions 201 are evenly distributed circumferentially, so that when the water-blocking member 2 rotates, it can more widely contact and shake the water droplets in the sealed chamber 3. Compared with a single protrusion 201, multiple protrusions 201 can cover a larger area, ensuring that the water droplets in the sealed chamber 3 are effectively thrown towards the outer wall 102, improving the efficiency and range of water shaking. One end of each protrusion 201 extends towards the shaft hole 202, and the other end extends towards the radial outer edge. When rotating, this shape of protrusion 201 can generate greater centrifugal force, more forcefully throwing the water droplets towards the outer wall 102, accelerating the discharge of water droplets. The circumferential distribution of multiple protrusions 201 forms a three-dimensional blocking structure. After water droplets enter the sealed chamber 3, they need to overcome the obstacles formed by the multiple protrusions 201 before they can continue to flow inward. This multi-layered blocking effect further reduces the risk of water droplets entering the motor. The protrusions 201 make it more difficult for water droplets to adhere to the surface of the water baffle 2. Compared with a smooth surface, the protrusions 201 can quickly throw water droplets away from the water baffle 2, reducing the time that water droplets stay on the water baffle 2, thereby reducing the possibility of water droplets entering the motor through the gap between the water baffle 2 and the sealed chamber 3. The multiple protrusions 201 are evenly distributed circumferentially, which makes the force on the water-blocking component 2 more uniform during rotation. This uniform force distribution can reduce the vibration and deformation of the water-blocking component 2 during high-speed rotation, improve the stability and service life of the water-blocking component 2. No matter how the motor speed changes, the multiple protrusions 201 can effectively play the role of splashing water and blocking. At low speed, the protrusions 201 can still guide water droplets to the drain hole 101; at high speed, the centrifugal force generated by the protrusions 201 is greater, and the splashing effect is more significant.

[0049] See also Figures 1 to 5 As shown, the protrusion 201 is arc-shaped, and the bending direction of the protrusion 201 matches the rotation direction of the rotating shaft 4.

[0050] Specifically, taking the end face of the water-blocking component 2 as the projection plane, multiple protrusions 201 are bent clockwise. The bending direction is to guide the liquid to be thrown out along the rotation tangent direction. The rotating shaft 4 reverses, that is, rotates counterclockwise. The protrusions 201 have a certain thickness in the axial direction. One end of the protrusion 201 extends to the shaft hole 202, and the other end of the protrusion 201 bends clockwise and extends to the outer edge of the water-blocking component 2. When rotating, water droplets between adjacent protrusions 201 will be collected on the side wall of the protrusion 201, and during continuous rotation, a radial outward component force will be generated on the water droplets, thereby throwing the water droplets out.

[0051] In this embodiment, the arc-shaped protrusion 201 allows water droplets to be more effectively flung towards the outer wall 102 when the shaft 4 rotates. The curvature of the arc matches the rotation direction of the shaft 4, causing the water droplets to be flung out along the arc surface of the protrusion 201 under the action of centrifugal force, thus improving the efficiency and force of water flung. The surface of the arc-shaped protrusion 201 makes it more difficult for water droplets to adhere to the water-blocking component 2 when rotating at high speed. The water droplets will slide along the arc surface towards the outer wall 102, reducing the residence time of the water droplets on the water-blocking component 2. The curvature of the arc-shaped protrusion 201 matches the rotation direction of the shaft 4, allowing the water droplets to flow along a specific path to the drain hole 101 when flung. This design ensures that the water droplets do not flow or accumulate randomly in the sealed chamber 3, but are guided to the drain hole 101 in an orderly manner. The smooth surface of the arc-shaped protrusion 201 reduces the eddy currents and backflow phenomena of water flow in the sealed chamber 3, making the water flow smoother and improving the drainage efficiency.

[0052] See also Figures 1 to 4 As shown, the rotating shaft 4 passes through the sealed chamber 3, and there is a sealing gap between the second through hole 131 and the outer wall of the rotating shaft 4. A sealing element 5 is provided in the sealing gap, and the sealing element 5 is a sealing ring.

[0053] Specifically, water droplets enter the sealed chamber 3 through the first through hole 121 from the axial outer end face of the end cap body 1. The radius of the first through hole 121 is relatively large, and the water droplets entering the sealed chamber 3 accumulate inside the sealed chamber 3, forming a temporary water accumulation area. Due to the structural design of the sealed chamber 3, the water droplets gradually accumulate inside the chamber. One end of the water baffle 2 (water baffle plate) is connected to the rotating shaft 4, and the other end extends into the sealed chamber 3. When the rotating shaft 4 rotates, the water baffle 2 rotates with the rotating shaft 4. The end face of the water baffle 2 facing the outer wall 102 is provided with multiple arc-shaped protrusions 201. One end of the protrusion 201 extends toward the shaft hole 202, and the other end extends toward the radial outer edge of the water baffle 2. When the water baffle 2 rotates, the protrusion 201 throws the water droplets toward the outer wall 102 of the sealed chamber 3 under the action of centrifugal force. Water droplets thrown onto the outer wall 102 flow towards the bottom along the outer wall 102 of the sealed chamber 3 under the combined action of gravity and centrifugal force. One end of the drain hole 101 is connected to the bottom of the sealed chamber 3, and the other end penetrates the outer peripheral wall of the end cover body 1. Water droplets enter the drain hole 101 during the flow and are discharged from the end cover body 1 through the drain hole 101. There is a sealing gap between the second through hole 131 and the outer wall of the rotating shaft 4. A sealing element 5 (such as a sealing ring or sealing gasket) is provided in the sealing gap. The function of the sealing element 5 is to prevent water droplets from entering the motor through the second through hole 131. The sealing element 5 maintains good sealing performance when the rotating shaft 4 rotates, ensuring that water droplets cannot enter the motor through the sealing gap.

[0054] In this embodiment, the seal 5 tightly fills the gap between the second through hole 131 and the outer wall of the shaft 4, forming an effective sealing barrier to prevent moisture from seeping into the motor and protecting the electrical components inside the motor from water damage. During motor operation, various complex working environments may be encountered, such as humidity, water splashes, or even short-term water immersion. The presence of the seal 5 ensures that moisture cannot easily enter the motor through the sealing gap under these conditions, improving the reliability of the motor in harsh environments. In actual manufacturing, the dimensions of the second through hole 131 and the shaft 4 may have certain tolerances. The seal 5 can fill the gaps caused by these tolerances, ensuring the reliability of the seal and maintaining a good sealing effect even when there are minor unevennesses in the components.

[0055] In this embodiment, the seal 5 is installed in the sealing gap between the second through hole 131 and the outer wall of the rotating shaft 4, tightly filling the gap to prevent water from entering the motor through this path. The water-blocking component 2, within the sealed chamber 3, uses centrifugal force generated by rotation to throw water droplets entering the sealed chamber 3 towards the outer wall 102 and guide them to the drain hole 101 for discharge. The two components work together to form a multi-layered protection, providing both blocking and drainage when water droplets intrude into the motor, greatly enhancing the waterproof effect. Relying solely on the seal 5 may lead to aging and wear due to long-term use, resulting in a decrease in sealing performance. Relying solely on the water-blocking component 2 may also allow some water droplets to break through the barrier and enter the motor due to accidental impact or intrusion at a special angle. When both components are installed simultaneously, they complement each other. Even if the seal 5 experiences a minor leak, the water-blocking component 2 can promptly discharge the water droplets. Conversely, if the water-blocking component 2 fails to completely discharge the water droplets due to malfunction or other reasons, the seal 5 can still prevent these water droplets from further entering the motor, improving the reliability of the entire sealing system. During motor operation, the rotation of shaft 4 may cause minor vibrations or deformations at the sealing gap. Seal 5 effectively buffers these vibrations and deformations, maintaining the stability of the sealing gap. At the same time, the centrifugal force of water-blocking component 2 during rotation also helps stabilize the pressure distribution within the sealing chamber 3, preventing uneven stress on seal 5 due to pressure changes from affecting the sealing effect. Together, they ensure the stable operation of the sealing system.

[0056] See also Figures 1 to 4 As shown, the second through hole 131 is provided with a first groove 132, the outer wall of the rotating shaft 4 is provided with a second groove 401, part of the wall of the sealing member 5 is installed in the first groove 132, and the other part of the wall of the sealing member 5 is installed in the second groove 401.

[0057] In this embodiment, part of the wall of the seal 5 is installed in the first groove 132 of the second through hole 131, and another part of the wall is installed in the second groove 401 on the outer wall of the rotating shaft 4. This arrangement allows the seal 5 to fit more tightly against the surfaces of the second through hole 131 and the rotating shaft 4, reducing the sealing gap and thus improving the sealing effect. By installing both ends of the seal 5 in the first groove 132 and the second groove 401 respectively, displacement or twisting of the seal 5 during use can be effectively prevented. This ensures that the seal 5 maintains a good sealing state throughout the entire operation, enhancing the reliability of the system. The installation method of the seal 5 in the first groove 132 and the second groove 401 allows it to more effectively block moisture from entering the motor through the gap between the second through hole 131 and the rotating shaft 4. This arrangement also maintains good sealing performance when the rotating shaft 4 rotates, preventing moisture from entering the motor under centrifugal force. Together with the water baffle 2, this sealing arrangement forms a multi-protection mechanism. Even if a small amount of moisture breaks through the barrier of the water baffle 2, the seal 5 can provide a second line of defense to ensure that moisture cannot enter the motor.

[0058] It is worth noting that the seal 5 is installed in the first groove 132 and the second groove 401. It must be ensured that it will not be displaced or twisted when the shaft 4 rotates. This can be achieved through precise size matching and proper installation to ensure that the seal 5 is firmly fixed in the groove. Even if the rotation of the shaft 4 will cause friction and wear to the seal 5, wear-resistant seal material can be selected for the seal 5, and the installation surface of the seal 5 can be made smooth to reduce wear.

[0059] An electric motor includes an end cover structure, wherein the end cover structure is an upper end cover structure.

[0060] In this embodiment, by applying the aforementioned end cap structure to the motor, moisture is promptly drained, preventing it from entering the motor and contacting critical electrical components such as the stator and windings. This avoids problems such as short circuits and corrosion caused by the conductivity of water, thereby protecting the internal structure and performance of the motor and extending its service life. Moisture accumulation easily leads to mold growth, which further damages the motor's insulation and mechanical properties. The drainage hole 101 reduces the possibility of moisture accumulation, thus lowering the risk of mold growth.

[0061] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0062] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An end cap structure, characterized in that, include: End cap body (1) and water-retaining component (2); With the longitudinal section of the end cap body (1) as the projection plane, a sealing chamber (3) is provided in the side wall of the end cap body (1). One end of the water baffle (2) is connected to the rotating shaft (4), and the other end of the water baffle (2) extends into the sealing chamber (3). The end cap body (1) is also provided with a drain hole (101) on its side wall. One end of the drain hole (101) is connected to the sealed chamber (3), and the other end of the drain hole (101) penetrates the outer peripheral wall of the end cap body (1).

2. The end cap structure of claim 1, wherein The drain hole (101) is located on the radial outer side of the sealed chamber (3), and the drain hole (101) is connected to the bottom of the sealed chamber (3).

3. The end cap structure of claim 1, wherein With the longitudinal section of the end cap body (1) as the projection plane, the end cap body (1) forms an outer wall (102) on the axial outer side of the sealing chamber (3), and an inner wall (103) on the axial inner side of the sealing chamber (3). The outer wall (102) has a first through hole (121), and the inner wall (103) has a second through hole (131). The radius of the first through hole (121) is greater than the radius of the second through hole (131).

4. The end cap structure of claim 3, wherein There is a height difference between the radial outer edge of the first through hole (121) and the radial outer edge of the second through hole (131), the height difference being H, and the height difference H satisfying: H>2mm.

5. The end cap structure of claim 3, wherein The water-blocking component (2) is a water-blocking plate. There is a rotation gap between the radial outer edge of the water-blocking component (2) and the outer edge wall of the sealing chamber (3). The rotation gap is used to prevent the water-blocking component (2) from contacting the end cap body (1). The axial thickness of the water-blocking component (2) is less than the vertical distance between the outer side wall (102) and the inner side wall (103).

6. The end cap structure of claim 5, wherein The water-blocking member (2) has a protrusion (201) on its end face facing the outer wall (102), and the protrusion (201) is used to throw water to the drain hole (101).

7. The end cap structure of claim 6, wherein The end face of the water-blocking member (2) is provided with a plurality of protrusions (201) in the circumferential direction. The water-blocking member (2) is provided with a shaft hole (202). One end of the protrusion (201) extends toward the shaft hole (202), and the other end of the protrusion (201) extends toward the radial outer edge of the water-blocking member (2).

8. The end cap structure according to claim 7, characterized in that, The protrusion (201) is arc-shaped, and the bending direction of the protrusion (201) matches the rotation direction of the rotating shaft (4).

9. The end cap structure of claim 3, wherein The rotating shaft (4) passes through the sealed chamber (3), and there is a sealing gap between the second through hole (131) and the outer wall of the rotating shaft (4), and a sealing element (5) is provided in the sealing gap.

10. The end cap structure of claim 9, wherein The second through hole (131) is provided with a first groove (132), the outer wall of the rotating shaft (4) is provided with a second groove (401), part of the wall of the sealing member (5) is installed in the first groove (132), and another part of the wall of the sealing member (5) is installed in the second groove (401).

11. An electrical machine comprising an end cap structure, characterised in that, The end cap structure is the end cap structure according to any one of claims 1 to 10.

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