A waterproof structure applied to a motor outgoing line

Abstract

The utility model discloses a waterproof structure for motor outgoing line belongs to motor field, solve the waterproof effect of motor outgoing line in prior art is poorer's problem, solve the technical scheme of this problem including the motor casing of being equipped with outgoing line hole, the fastener of being equipped with threading hole and with the detachable connection of motor casing and the elastic sealing element of setting in threading hole, and the elastic sealing element is used for setting on motor outgoing line, the end of threading hole is equipped with the first inclined plane that contracts to threading hole, the end of outgoing line hole is equipped with the second inclined plane that contracts to outgoing line hole, and the first inclined plane is opposite second inclined plane setting, when fastener is installed outgoing line hole of motor casing and is connected with motor casing, outgoing line hole and threading hole are communicated, and fastener and / or motor casing exert extrusion stress to elastic sealing element, make elastic sealing element take place elastic deformation, and the both ends of elastic sealing element are respectively pasted on the first inclined plane and the second inclined plane. The utility model is used for improving the waterproof performance of motor outgoing line.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a waterproof structure for use with motor leads. Background Technology

[0002] In the operating environment of a motor, the waterproof sealing performance of the lead-out section directly affects the safety and service life of the equipment. However, existing waterproof structures for motor lead-out sections generally suffer from poor sealing performance. Traditional designs often use simple rubber gaskets or sealants to seal the lead-out lines, lacking a reliable mechanical compression sealing mechanism. This makes them susceptible to vibration, temperature changes, and aging issues caused by long-term use, leading to seal failure. Furthermore, the ends of the lead-out holes and fastener through holes are usually straight-edged, preventing the gradual compression of the elastic seal after assembly. This results in a loose fit between the seal and the hole wall, creating a through gap that allows moisture to seep into the motor along the lead-out lines. Utility Model Content

[0003] The purpose of this invention is to provide a waterproof structure for motor outlets, which solves the problem of poor waterproof effect of motor outlets in the prior art and improves the waterproof performance of motor outlets.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a waterproof structure for motor lead wires, comprising a motor housing with a lead wire hole, a fastener with a through-hole and detachably connected to the motor housing, and an elastic seal disposed within the through-hole. The elastic seal is used to be fitted onto the motor lead wire. The end of the through-hole has a first inclined surface that contracts inward, and the end of the lead wire hole has a second inclined surface that contracts inward. The first inclined surface and the second inclined surface are opposite to each other. When the fastener is inserted into the lead wire hole of the motor housing and connected to the motor housing, the lead wire hole and the through-hole are connected. The fastener and / or the motor housing apply a compressive force to the elastic seal, causing the elastic seal to undergo elastic deformation. The two ends of the elastic seal are respectively attached to the first inclined surface and the second inclined surface.

[0005] After adopting the above technical solution, this utility model has the following advantages: By setting an inwardly contracting first inclined surface at the end of the fastener's wire hole and a corresponding second inclined surface at the end of the motor housing's wire outlet hole, when the fastener is connected to the motor housing, the mechanical action between the fastener and the motor housing applies pressure to the elastic seal, causing it to undergo elastic deformation. During this process, both ends of the elastic seal are forced to undergo radial inward contraction along the inclined surface direction, and are tightly fitted with the corresponding first and second inclined surfaces, respectively. This not only increases the sealing contact area but also creates a continuous and uninterrupted surface contact between the elastic seal and the inclined surface, effectively eliminating through gaps and thus blocking the path of moisture seeping into the motor along the lead wire as much as possible. Moreover, the mechanical connection between the fastener and the motor housing actively applies a continuous mechanical compressive force to the elastic seal, overcoming the shortcomings of traditional methods that rely solely on the elasticity or adhesive force of the elastic seal itself. This provides a more durable and reliable physical sealing guarantee, minimizing the problem of decreased sealing performance caused by motor vibration and loosening of the elastic seal during long-term use.

[0006] Furthermore, the fastener is an elastic structure. When the fastener is inserted into the outlet hole of the motor housing and connected to the motor housing, the fastener and the elastic seal undergo elastic deformation, and the fastener and the motor housing, the fastener and the elastic seal, and the elastic seal and the motor lead wire are all in contact with each other.

[0007] Using the aforementioned technical solution, when the elastic fastener is inserted into the outlet hole of the motor housing and the connection is completed, the fastener itself and the internal elastic seal undergo elastic deformation simultaneously. This ensures that the fastener and the motor housing can adaptively fit together, effectively compensating for any dimensional deviations or local unevenness that may occur during assembly, and eliminating gaps between them. Furthermore, the elasticity of the fastener allows the contact surface with the elastic seal to be evenly stressed and tightly fitted, minimizing the risk of local separation or stress concentration caused by rigid compression. Under axial compression and inclined plane guidance, the two ends of the elastic seal respectively fit against the first and second inclined planes, forming a reliable hole wall seal. Simultaneously, the inner wall of the seal fits against the surface of the motor lead wire, achieving a seal around the motor lead wire and further improving the waterproof performance of the motor lead wire. Moreover, during motor operation, if the connection loosens or the sealing pressure weakens due to vibration, temperature changes, or material aging, the rebound force of the two elastic elements can continuously release compensating force, dynamically maintaining a tight fit at each contact interface, thereby achieving a stable and reliable long-term sealing effect.

[0008] Furthermore, the threading hole includes a first threading segment and a second threading segment along the axial direction. The diameter of the first threading segment is smaller than the diameter of the second threading segment to form a stepped surface at their intersection. The first inclined surface is provided on the first threading segment. The elastic seal is provided on the first threading segment, and one end of the elastic seal abuts against the stepped surface, while the other end of the elastic seal abuts against the second inclined surface.

[0009] Using the aforementioned technical solution, the stepped surface provides stable axial limiting support for the elastic seal, preventing it from shifting or coming out during assembly or operation. During the fastener tightening process, the elastic seal is subjected to the reaction force from the stepped surface and the squeezing action of the second inclined surface, forming a stable compression state with forces at both ends, causing it to deform uniformly along the first and second inclined surfaces, ensuring as close a tight fit between the seal and the inclined surfaces and lead wires as possible.

[0010] Furthermore, the fastener is provided with an outwardly extending stop lip, which abuts against the motor housing when the fastener is assembled in place.

[0011] Using the aforementioned technical solution, the stop lip plays an axial positioning role, ensuring the fastener installation depth is accurate as much as possible, guaranteeing a stable and consistent amount of compression on the elastic seal, and avoiding seal failure due to excessive tightness or looseness. At the same time, the stop lip and the abutment surface of the motor housing form an additional contact sealing area, effectively sealing the gap between the fastener and the outside of the motor housing, and preventing moisture from seeping in from the outside along the assembly interface.

[0012] Furthermore, the motor housing includes an axial positioning surface that mates with a stop lip, the stop lip abutting against the axial positioning surface when the fastener is assembled in place.

[0013] Through the above technical solution, the axial positioning surface provides a precise and flat abutment reference for the stop lip, ensuring that the axial position of the fastener is consistent each time it is installed, thereby ensuring that the compression of the internal elastic seal is stable and controllable, and avoiding insufficient sealing or damage due to uneven assembly depth. At the same time, the tight abutment between the stop lip and the axial positioning surface forms a flat and reliable end face contact, effectively sealing the assembly gap between the fastener and the outer side of the motor housing, and further preventing external moisture from seeping in from the interface.

[0014] Furthermore, the motor housing is provided with an axial positioning surface, and the axial positioning surface is provided with a water-blocking rib surrounding the cable outlet hole. When the fastener is assembled in place, the stop lip abuts against the water-blocking rib, and the water-blocking rib, the axial positioning surface and the motor housing together form a water collection trough.

[0015] Through the above technical solutions, the water-blocking rib acts as an additional sealing barrier, extending the path for external moisture to penetrate inward. Even if a small amount of water vapor or liquid crawls along the surface of the motor housing, it will be blocked by the water-blocking rib. The contact between the stop lip and the water-blocking rib further enhances the sealing performance of the sealing interface, preventing water from directly intruding from the outside of the fastener as much as possible. The water collection tank structure formed by the water-blocking rib, the axial positioning surface, and the motor housing can collect and confine any small amount of water that has seeped in or condensed within the tank, preventing it from diffusing inward as much as possible.

[0016] Furthermore, both ends of the elastic seal are chamfered.

[0017] Through the above technical solution, the chamfered structure can achieve a smoother and more fitting transition contact with the first bevel inside the wire hole and the second bevel at the end of the wire outlet hole of the motor housing. When the fasteners tighten the seal, the chamfer guides the seal to deform evenly along the bevel direction, avoiding stress concentration at the corners as much as possible and reducing the risk of the seal being crushed or developing micro-cracks. At the same time, the chamfer helps the seal to be smoothly introduced into the bevel area during assembly, improving installation efficiency and consistency. The cooperation between the chamfer and the bevel makes the sealing contact surface more continuous, further eliminating potential water seepage channels, improving the integrity and reliability of the sealing interface, and ensuring good waterproof performance during long-term operation as much as possible.

[0018] Furthermore, the fastener has a downwardly extending insertion portion that is inserted into the outlet hole. The outer side wall of the insertion portion has an external thread, and the inner side wall of the outlet hole has an internal thread that mates with the external thread.

[0019] Through the above technical solution, on the one hand, the insertion part plays a guiding and positioning role during assembly, which facilitates installation. At the same time, the threaded connection has a stable structure and high connection strength, which can effectively resist vibration and mechanical impact and ensure the long-term reliability of the connection. On the other hand, after the internal and external threads are screwed together, a continuous and tortuous spiral sealing path is formed, which constitutes a significant physical barrier to water penetration, extends the water seepage path, increases the leakage resistance, and prevents liquid from entering the motor through the thread gap as much as possible, thereby improving the waterproof sealing performance of the outlet hole.

[0020] Furthermore, the fastener also includes a non-circular operating part fixedly connected to the insertion part, the non-circular operating part being located outside the motor housing.

[0021] Through the above technical solutions, the non-circular operating part is easy to tighten or disassemble, effectively transmits torque, and makes installation and maintenance more convenient and efficient.

[0022] Furthermore, the fastener is fixed to the motor housing by threads, and the top of the wire hole has a conductor surface, which extends obliquely from the side wall of the wire hole to the top wall of the wire hole.

[0023] Through the above technical solution, the inclined conductor surface forms a smooth guiding structure at the entrance of the wire hole, which facilitates the smooth insertion of the motor lead wire into the wire hole and minimizes the risk of damage to the insulation layer caused by excessive bending angle or direct friction with the edge of the hole during the assembly process. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram of the waterproof structure applied to the motor outlet wire in this utility model;

[0026] Figure 2 This is a cross-sectional view of the waterproof structure applied to the motor outlet wire in this utility model;

[0027] Figure 3 In this utility model Figure 2 An enlarged view of the structure at point A;

[0028] Figure 4 This is a schematic diagram of the fastener structure in this utility model;

[0029] Figure 5 This is a partial structural diagram of the motor housing in this utility model;

[0030] Figure 6 This is a schematic diagram of the waterproof structure applied to the motor outlet wire in other embodiments of this utility model;

[0031] In the figure, 10 is the motor housing; 11 is the cable outlet; 12 is the second inclined surface; 13 is the axial positioning surface; 14 is the water-blocking rib; 15 is the water collection trough; 16 is the internal thread; 20 is the fastener; 201 is the insertion part; 202 is the external thread; 21 is the cable hole; 211 is the first cable section; 212 is the second cable section; 213 is the stepped surface; 22 is the first inclined surface; 23 is the stop lip; 24 is the non-circular operating part; 25 is the conductor surface; 30 is the elastic seal; 31 is the chamfer; and 40 is the motor lead wire. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0033] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.

[0034] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0035] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0036] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0037] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0038] like Figures 1 to 5As shown, this utility model provides a waterproof structure for motor lead wires, including a motor housing 10 with a lead wire hole 11, a fastener 20 with a wire through hole 21 and detachably connected to the motor housing 10, and an elastic sealing member 30 disposed in the wire through hole 21. The elastic sealing member 30 is used to fit onto the motor lead wire 40. The end of the wire through hole 21 is provided with a first inclined surface 22 that contracts into the wire through hole 21, and the end of the lead wire hole 11 is provided with a second inclined surface 12 that contracts into the lead wire hole 11. The first inclined surface 22 and the second inclined surface 12 are arranged opposite to each other. When the fastener 20 is inserted into the lead wire hole 11 of the motor housing 10 and connected to the motor housing 10, the lead wire hole 11 and the wire through hole 21 are connected. The fastener 20 and / or the motor housing 10 apply a compressive force to the elastic sealing member 30, causing the elastic sealing member 30 to undergo elastic deformation. The two ends of the elastic sealing member 30 are respectively attached to the first inclined surface 22 and the second inclined surface 12.

[0039] By providing an inwardly contracting first inclined surface 22 at the end of the wire hole 21 of the fastener 20 and a corresponding second inclined surface 12 at the end of the wire outlet hole 11 of the motor housing 10, when the fastener 20 is connected to the motor housing 10, the mechanical action between the fastener 20 and the motor housing 10 applies pressure to the elastic seal 30, causing it to undergo elastic deformation. During this process, both ends of the elastic seal 30 are forced to undergo radial inward contraction deformation along the inclined surface direction, and are tightly fitted with the corresponding first inclined surface 22 and second inclined surface 12. This not only increases the sealing contact area, but also makes the elastic seal 30 and the inclined surface form a continuous and uninterrupted surface contact, effectively eliminating through gaps and thus blocking the path of moisture seeping into the motor along the lead wire as much as possible. Furthermore, the mechanical connection between the fastener 20 and the motor housing 10 actively applies a continuous mechanical compressive force to the elastic seal 30, overcoming the shortcomings of traditional methods that rely solely on the elasticity or adhesive force of the elastic seal 30 itself. This provides a more durable and reliable physical sealing guarantee, minimizing the risk of decreased sealing performance caused by motor vibration and loosening of the elastic seal 30 during long-term use.

[0040] To facilitate the fit between the elastic seal 30 and the first inclined surface 22 and the second inclined surface 12, both ends of the elastic seal 30 are provided with chamfers 31, and the inclination direction of the chamfers 31 is consistent with the inclination direction of the corresponding first inclined surface 22 and second inclined surface 12. The chamfer 31 structure enables a smoother and more fitted transition contact with the first inclined surface 22 in the wire hole 21 and the second inclined surface 12 at the end of the wire outlet hole 11 of the motor housing 10. When the fastener 20 presses the seal, the chamfer 31 guides the seal to deform evenly along the inclined surface direction, avoiding stress concentration at the corners as much as possible and reducing the risk of the seal being crushed or developing micro-cracks. At the same time, the chamfer 31 helps the seal to be smoothly introduced into the inclined surface area during assembly, improving installation efficiency and consistency. The cooperation between the chamfer 31 and the inclined surface makes the sealing contact surface more continuous, further eliminating potential water seepage channels, improving the integrity and reliability of the sealing interface, and ensuring good waterproof performance during long-term operation as much as possible.

[0041] Furthermore, the fastener 20 is an elastic structure. When the fastener 20 is inserted into the outlet hole 11 of the motor housing 10 and connected to the motor housing 10, the fastener 20 itself and the internal elastic seal 30 undergo elastic deformation simultaneously. This ensures that the fastener 20 and the motor housing 10 can adaptively fit together, effectively compensating for any dimensional deviations or local unevenness that may occur during assembly, and eliminating gaps between them. Furthermore, the elasticity of the fastener 20 allows its contact surface with the elastic seal 30 to be evenly stressed and tightly fitted, minimizing the risk of local separation or stress concentration caused by rigid compression. Under axial compression and inclined plane guidance, the two ends of the elastic seal 30 respectively fit against the first inclined plane 22 and the second inclined plane 12, forming a reliable hole wall seal. Simultaneously, the inner wall of the elastic seal 30 fits against the surface of the motor lead wire 40, achieving a seal around the motor lead wire 40. The fit between the fastener 20 and the motor housing 10, and between the fastener 20 and the elastic seal 30, further enhances the waterproof performance of the motor lead wire. Moreover, during motor operation, if the connection becomes loose or the sealing pressure weakens due to vibration, temperature changes or material aging, the rebound force of the two elastic structures can continuously release compensating force, dynamically maintaining the tight fit of each contact interface, thereby achieving a stable and reliable long-term sealing effect.

[0042] Furthermore, the fastener 20 is provided with an outwardly extending stop lip 23, which abuts against the motor housing 10 when the fastener 20 is assembled in place. The stop lip 23 serves as an axial positioning element, ensuring the fastener 20 is installed to the most accurate depth possible, guaranteeing a stable and consistent compression of the elastic seal 30, and minimizing seal failure due to excessive tightness or looseness. At the same time, the abutting surface of the stop lip 23 and the motor housing 10 forms an additional contact sealing area, effectively sealing the gap between the fastener 20 and the outside of the motor housing 10, and preventing moisture from seeping in from the outside along the assembly gap.

[0043] The motor housing 10 includes an axial positioning surface 13 that mates with a stop lip 23. The axial positioning surface 13 is recessed relative to the surface of the motor housing 10. The stop lip 23 abuts against the axial positioning surface 13 when the fastener 20 is assembled. The axial positioning surface 13 provides a precise and flat abutment reference for the stop lip 23, ensuring that the axial position of the fastener 20 is consistent with each installation, thereby ensuring stable and controllable compression of the internal elastic seal 30 and minimizing the risk of insufficient sealing or damage due to inconsistent assembly depth. At the same time, the tight abutment between the stop lip 23 and the axial positioning surface 13 forms a flat and reliable end face contact, effectively sealing the assembly gap between the fastener 20 and the outer side of the motor housing 10, further preventing external moisture from seeping in through the assembly gap.

[0044] It should be noted that the axial positioning surface 13 can be a horizontal surface to provide uniform axial support; or it can be constructed as a slope that is higher on the side closer to the outlet hole 11 and lower on the side farther away from the outlet hole 11. This sloped structure helps to guide the stop lip 23 to fit accurately and forms an outward guiding slope when water accumulates outside, so that water flows away from the outlet hole 11, reducing the accumulation of water along the shell surface towards the outlet hole 11, and further improving the waterproof performance.

[0045] The threading hole 21 includes a first threading segment 211 and a second threading segment 212 along the axial direction. The diameter of the first threading segment 211 is smaller than the diameter of the second threading segment 212, forming a stepped surface 213 at their intersection. A first inclined surface 22 is provided on the first threading segment 211. The diameter of the elastic seal 30 is larger than that of the first threading segment 211 but smaller than that of the second threading segment 212. The elastic seal 30 is provided on the first threading segment 211, and one end of the elastic seal 30 abuts against the stepped surface 213, while the other end of the elastic seal 30 abuts against the first threading segment 211. The two inclined surfaces 12 abut against each other, providing stable axial limiting support for the elastic seal 30, preventing it from shifting or coming off during assembly or operation as much as possible. During the tightening process of the fastener 20, the elastic seal 30 is subjected to the reaction force from the stepped surface 213 and the squeezing action of the second inclined surface 12, forming a stable compression state with forces at both ends, so that it deforms uniformly along the first inclined surface 22 and the second inclined surface 12, ensuring that the elastic seal 30 fits tightly with the first inclined surface 22, the second inclined surface 12 and the motor lead wire 40 as much as possible.

[0046] The fastener 20 has a downwardly extending insertion part 201 that inserts into the outlet hole 11. The outer side wall of the insertion part 201 has an external thread 202, and the inner side wall of the outlet hole 11 has an internal thread 16 that mates with the external thread 202. On the one hand, the insertion part 201 serves as a guide and positioner during assembly, facilitating installation. Simultaneously, the threaded connection structure is stable and has high connection strength, effectively resisting vibration and mechanical impact, ensuring long-term reliability of the connection. On the other hand, the engagement of the internal and external threads 202 forms a continuous, tortuous spiral sealing path, significantly hindering water penetration, extending the seepage path, increasing leakage resistance, and preventing liquid from entering the motor along the thread gap, thus improving the waterproof sealing performance of the outlet hole 11.

[0047] To facilitate installation and disassembly, the fastener 20 also includes a non-circular operating part 24, such as a hexagonal, square or other polygonal structure, which is fixedly connected to the insertion part 201. The non-circular operating part 24 is located outside the motor housing 10, making it easy to tighten or disassemble using tools such as wrenches and sockets, effectively transmitting torque and making installation and maintenance more convenient and efficient.

[0048] To facilitate wire threading, the fastener 20 is fixed to the motor housing 10 by threads. The top of the wire threading hole 21 has a conductor surface 25. The conductor surface 25 extends obliquely from the side wall of the wire threading hole 21 to the top wall of the wire threading hole 21, forming a smooth guide structure. This facilitates the smooth insertion of the motor lead wire 40 into the wire threading hole 21 and minimizes the risk of damage to the insulation layer caused by excessive bending angle or direct friction with the edge of the hole during the assembly process.

[0049] It should be noted that the elastic seal 30 can be a rubber ring, which utilizes its elasticity to achieve a tight seal on the motor lead wire 40 and a tight fit with structures such as the first inclined surface 22, the second inclined surface 12, and the stepped surface 213. The fastener 20 can be a rubber plug, which is made of elastic material and has deformable characteristics. It can be connected to the motor housing 10 by threads and can also undergo elastic deformation during assembly to ensure a multi-level tight fit between the fastener and the motor housing 10, the seal, and the lead wire. The combination of rubber ring and rubber plug can be flexibly selected according to actual needs, and both can effectively play the role of elastic compensation and reliable sealing, which is suitable for waterproof designs of motor lead wires with different structural forms.

[0050] It should be noted that the waterproof performance mentioned in this application refers not only to preventing water intrusion, but also to the sealing effect achieved by the technical solution, which is also applicable to preventing the penetration of oils and other liquids, while effectively blocking the leakage or entry of gases such as moisture and corrosive gases. It also possesses good dustproof functionality. Through designs such as inclined extrusion, 30° deformation fitting of elastic sealing elements, multi-interface sealing, and a labyrinth structure, this sealing structure can better block the intrusion of liquids, gases, and solid particles, making it suitable for various industrial environments with high sealing requirements. It can effectively improve the operational reliability and service life of motors under complex conditions such as humidity, oil contamination, dust, or corrosive atmospheres.

[0051] Understandably, in other embodiments, the fastener has a downwardly extending insertion portion that is inserted into the outlet hole. The insertion portion is made of an elastic material with an outer diameter slightly larger than the inner diameter of the outlet hole. When the insertion portion is pressed into the outlet hole, it deforms due to its own elasticity and forms an interference fit with the inner wall of the outlet hole, thereby achieving a reliable connection between the fastener and the motor housing. No additional connection structure is required to ensure that the fastener is securely installed.

[0052] like Figure 6 As shown, it can be understood that in other embodiments, the motor housing 10 is provided with an axial positioning surface 13, and the axial positioning surface 13 is provided with a water-blocking rib 14 surrounding the cable outlet hole 11. The water-blocking rib 14 acts as an additional sealing barrier, extending the path for external moisture to penetrate inward. Even if a small amount of water vapor or liquid crawls along the surface of the motor housing 10, it will be blocked by the water-blocking rib 14. When the fastener 20 is assembled in place, the stop lip 23 abuts against the water-blocking rib 14, further strengthening the sealing of the sealing interface and preventing water from directly intruding from the outside of the fastener 20 as much as possible. The water-blocking rib 14, the axial positioning surface 13, and the motor housing 10 together form a water collection tank 15, which can collect and confine any small amount of water that has seeped in or condensed within the tank, preventing it from diffusing inward as much as possible.

[0053] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A waterproof structure for use with motor leads, characterized in that, The device includes a motor housing with a cable outlet hole, a fastener with a cable through hole and detachably connected to the motor housing, and an elastic seal disposed within the cable through hole. The elastic seal is used to fit onto the motor lead wire. The end of the cable through hole has a first inclined surface that contracts into the cable through hole, and the end of the cable outlet hole has a second inclined surface that contracts into the cable outlet hole. The first inclined surface and the second inclined surface are arranged opposite to each other. When the fastener is inserted into the cable outlet hole of the motor housing and connected to the motor housing, the cable outlet hole and the cable through hole are connected. The fastener and / or the motor housing apply a compressive force to the elastic seal, causing the elastic seal to undergo elastic deformation. The two ends of the elastic seal are respectively attached to the first inclined surface and the second inclined surface.

2. The waterproof structure applied to motor outlet wires according to claim 1, characterized in that, The fastener is an elastic structure. When the fastener is inserted into the outlet hole of the motor housing and connected to the motor housing, the fastener and the elastic seal undergo elastic deformation. The fastener and the motor housing, the fastener and the elastic seal, and the elastic seal and the motor lead wire are all in contact with each other.

3. The waterproof structure applied to motor output wires according to claim 1, characterized in that, The threading hole includes a first threading segment and a second threading segment along the axial direction. The diameter of the first threading segment is smaller than the diameter of the second threading segment to form a stepped surface at their intersection. The first inclined surface is provided on the first threading segment. The elastic seal is provided on the first threading segment, and one end of the elastic seal abuts against the stepped surface. The other end of the elastic seal abuts against the second inclined surface.

4. The waterproof structure applied to motor outlet wires according to claim 1, characterized in that, The fastener has an outwardly extending stop lip, which abuts against the motor housing when the fastener is assembled in place.

5. The waterproof structure applied to motor outlet wires according to claim 4, characterized in that, The motor housing includes an axial positioning surface that mates with a stop lip, the stop lip abutting against the axial positioning surface when the fasteners are assembled in place.

6. The waterproof structure applied to motor output wires according to claim 5, characterized in that, The motor housing is provided with an axial positioning surface, and the axial positioning surface is provided with a water-blocking rib surrounding the cable outlet hole. When the fastener is assembled in place, the stop lip abuts against the water-blocking rib, and the water-blocking rib, the axial positioning surface and the motor housing together form a water collection trough.

7. The waterproof structure applied to motor outlet wires according to claim 1, characterized in that, Both ends of the elastic seal are chamfered.

8. The waterproof structure applied to motor outlet wires according to claim 1, characterized in that, The fastener has a downwardly extending insertion part that is inserted into the outlet hole. The outer side wall of the insertion part has an external thread, and the inner side wall of the outlet hole has an internal thread that mates with the external thread.

9. The waterproof structure applied to motor output wires according to claim 8, characterized in that, The fastener also includes a non-circular operating part that is fixedly connected to the insertion part, and the non-circular operating part is located outside the motor housing.

10. The waterproof structure applied to motor outlet wires according to claim 1, characterized in that, The fastener is fixed to the motor housing by threads. The top of the wire hole has a conductor surface, which extends obliquely from the side wall of the wire hole to the top wall of the wire hole.

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