Waterproof outlet structure and motor

Abstract

A waterproof outlet structure, comprising a shell, the shell is provided with an outlet seat, the outlet seat has at least one and sets up side by side in the inner outlet hole, the bottom of inner outlet hole has the annular step formed along the radial direction and protrudes inwardly, the sealing cover plate is fitted on the outlet seat, the sealing cover plate has the outer outlet hole coaxially corresponding with the inner outlet hole, the sealing sleeve assembly for being sleeved on the cable is arranged between the inner outlet hole and the outer outlet hole, the lower end of the sealing sleeve assembly is sealingly fitted on the annular step, the sealing cover plate is detachably installed on the outlet seat by the fastener, the outer outlet hole is away from the one end of the outlet seat and has the extrusion part with gradually smaller diameter, the extrusion part is in abutment with the upper end of the sealing sleeve assembly in the state of fastening installation of the sealing cover plate, so that the sealing sleeve assembly is sealingly held tightly to the cable by inwardly shrinking, the utility model has the advantages of reasonable structure design, the distance between the cables is smaller under the condition of ensuring waterproof sealing, and the size of outlet part is reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a waterproof cable outlet structure and a motor. Background Technology

[0002] An electric motor, also known as an electric motor, is an engine that uses electromagnetic force. It refers to electrical equipment that converts electrical energy into mechanical energy through electromagnetic principles, generating kinetic energy to drive other devices. Three-phase electric motors are widely used due to their simple structure and ease of manufacturing, maintenance, and use. However, due to operational requirements, water ingress into electric motors can cause electrical short circuits, material corrosion, and insulation failure, leading to catastrophic failures. Currently, the main solution to this problem is to pass cables through waterproof connectors with nuts. The sealing structure inside the connector waterproofs each cable. Since each waterproof connector has a nut, the distance between adjacent cables must consider both the nut's turning radius and the wrench's operating space, thus increasing the spacing between adjacent cables and requiring a larger cable exit point, which hinders miniaturization design. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a waterproof cable outlet structure and motor with reasonable structural design, which can reduce the distance between cables while ensuring waterproof sealing, and thus reduce the size of the cable outlet part.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A waterproof cable outlet structure includes a housing with a cable outlet base. The cable outlet base has at least one inner cable outlet hole arranged side by side, and the bottom of the inner cable outlet hole has an annular step protruding radially inward. A sealing cover plate is fitted onto the cable outlet base, and the sealing cover plate has an outer cable outlet hole coaxially corresponding to the inner cable outlet holes. A sealing sleeve assembly for sleeved on a cable is provided between the inner cable outlet holes and the outer cable outlet holes, and the lower end of the sealing sleeve assembly is sealably fitted onto the annular step. The sealing cover plate is detachably mounted on the cable outlet base by fasteners. The end of the outer cable outlet hole away from the cable outlet base has a pressing part with a gradually decreasing diameter. The pressing part abuts against the upper end of the sealing sleeve assembly when the sealing cover plate is securely installed, causing the sealing sleeve assembly to contract inward and seal tightly around the cable.

[0005] In use, the cable passes sequentially through the inner outlet hole, the sealing sleeve assembly, and the outer outlet hole. The sealing cover is then fitted onto the outlet seat using fasteners. At this point, the pressing part of the outer outlet hole abuts against the upper end of the sealing sleeve assembly. Because the pressing part has a gradually decreasing diameter, the force applied to the upper end of the sealing sleeve assembly compresses the assembly axially and radially. The lower end of the sealing sleeve assembly forms the first seal between itself and the annular step, while the upper end contracts inward to grip the cable, forming the second seal, thus achieving a waterproof seal for the cable and the interior of the housing. In this structure, the inner outlet holes are arranged side-by-side on the outlet seat, while the corresponding outer outlet holes are located on the sealing cover. The sealing of each cable's sealing sleeve assembly is achieved through the overall assembly of the sealing cover, eliminating the need for nuts on each cable in traditional sealing structures. This eliminates the need to consider the nut's rotation diameter and the wrench's operating space, allowing for a more compact design of the inner outlet holes and reducing the length and width of the outlet seat.

[0006] Furthermore, the sealing sleeve assembly includes an elastic sealing sleeve and a rigid locking sleeve; one end of the elastic sealing sleeve is sealed to the annular step, the inner diameter of the rigid locking sleeve matches the outer diameter of the elastic sealing sleeve, and is fitted onto the elastic sealing sleeve; the end of the rigid locking sleeve opposite to the annular step has a locking strip extending axially, and multiple locking strips are evenly distributed along the circumference of the rigid locking sleeve.

[0007] In this way, a locking strip extends from the end of the rigid locking sleeve, giving the locking strip both rigidity, enabling it to transmit axial pressure, and a certain degree of flexibility, allowing it to bend towards the center under the inward force of the compression section and press the elastic sealing sleeve to hold the cable.

[0008] Furthermore, the outer diameter of the rigid locking sleeve is larger than the inner diameter of the annular step, and the end of the elastic sealing sleeve facing the annular step has a sealing gasket that protrudes radially outward, the diameter of which is greater than or equal to the outer diameter of the rigid locking sleeve.

[0009] In this way, the pressure exerted by the extrusion part on the locking strip is partly applied radially to the locking strip, which inwardly bends and presses the elastic sealing sleeve, and partly applied axially to the sealing gasket through the circumferentially distributed locking strip, which presses the sealing gasket tightly onto the annular step, thereby achieving end face sealing at the annular step.

[0010] Furthermore, there is an obliquely arranged partition groove between two adjacent locking bars, and their radial projections at the partition groove overlap.

[0011] In this way, the locking strip bends inward after being subjected to the radial force applied by the compression part, and the two adjacent locking strips form a structure of mutual compression at the partition groove. At the same time, the two adjacent locking strips can also be staggered with each other by utilizing the inclined surface of the partition groove, so that the circumferentially distributed locking strips form an annular structure with a variable inner diameter, making the force applied to the elastic sealing sleeve more uniform.

[0012] Furthermore, the cross-sectional shape of the extrusion section in the axial direction is arc-shaped.

[0013] In this way, the arc-shaped inner wall of the extrusion section allows the end of the locking strip to retract more smoothly inward under pressure and compress the elastic sealing sleeve, making the operation more reliable.

[0014] Furthermore, the rigid locking sleeve includes an integrally formed support sleeve and a locking sleeve. The locking sleeve is formed by the locking strips evenly distributed circumferentially. The outer wall of the locking sleeve protrudes radially outward. The outer diameter of the support sleeve matches the inner diameter of the inner cable outlet hole, and its length is greater than the depth from the inner cable outlet hole to the annular step.

[0015] In this way, by protruding the outer wall of the locking sleeve outward, the radial thickness of the locking sleeve portion can be increased, allowing for greater radial overlap between adjacent locking strips. Furthermore, the outer diameter of the support sleeve matches the inner diameter of the inner outlet hole to ensure coaxial fit. To ensure the support sleeve reliably presses against the sealing gasket, its length needs to be greater than the depth of the inner outlet hole.

[0016] Furthermore, the outlet seat is provided with threaded holes, which are distributed along the edge of the outlet seat; the sealing cover plate has bolt holes coaxially corresponding to the threaded holes, and the fastener is a bolt that passes through the bolt holes and is connected to the threaded holes.

[0017] Furthermore, a threaded hole is provided between any two adjacent outlet holes, and each of the inner outlet holes has two threaded holes arranged radially in the circumferential direction.

[0018] In this way, the line connecting two adjacent threaded holes forms a zigzag shape, which can ensure the connection strength and reduce the use of bolts.

[0019] Furthermore, the bolt hole has a countersunk hole, and the bolt is an internal hex bolt.

[0020] An electric motor includes a housing having a waterproof cable outlet structure as described above.

[0021] In summary, this utility model has the advantages of reasonable structural design, which allows for smaller distances between cables while ensuring waterproof sealing, thus reducing the size of the cable outlet. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the motor.

[0023] Figure 2 This is an exploded structural diagram of the cable outlet section.

[0024] Figure 3 for Figure 2 A cross-sectional structural diagram of the center outlet connector.

[0025] Figure 4 This is a cross-sectional structural diagram of the cable outlet, sealing cover, and sealing sleeve assembly.

[0026] Figure 5 This is a schematic diagram of the rigid locking sleeve.

[0027] Figure 6 This is a schematic diagram of the sealing cover. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments.

[0029] In practical implementation: such as Figures 1-6 As shown, a motor includes a housing 1, on which a cable outlet 2 is provided. The cable outlet 2 has at least two internal cable outlet holes 21 arranged side by side. The bottom of each internal cable outlet hole 21 has an annular step 22 protruding radially inward. A sealing cover plate 3 is fitted onto the cable outlet 2. The sealing cover plate 3 has an external cable outlet hole 31 coaxially corresponding to the internal cable outlet holes 21. A sealing sleeve assembly 4 for fitting onto a cable is provided between the internal cable outlet holes 21 and the external cable outlet holes 31. The lower end of the sealing sleeve assembly 4 is sealably fitted onto the annular step 22; the sealing cover plate 3 is detachably mounted on the cable outlet 2 by fasteners, and the end of the cable outlet hole 31 away from the cable outlet 2 has a compression part 32 with a gradually decreasing diameter. The compression part 32 abuts against the upper end of the sealing sleeve assembly 4 when the sealing cover plate 3 is fastened. The cross-sectional shape of the compression part 32 in the axial direction is arc-shaped, so that the sealing sleeve assembly 4 contracts inward to seal and tighten the cable.

[0030] In this embodiment, the sealing sleeve assembly 4 includes an elastic sealing sleeve 41 and a rigid locking sleeve 42. One end of the elastic sealing sleeve 41 is sealed to the annular step 22. The inner diameter of the rigid locking sleeve 42 matches the outer diameter of the elastic sealing sleeve 41 and is fitted onto the elastic sealing sleeve 41. The end of the rigid locking sleeve 42 facing away from the annular step 22 has a locking strip extending axially. Multiple locking strips are evenly distributed along the circumference of the rigid locking sleeve 42. There is an obliquely arranged partition groove between two adjacent locking strips, and their radial projections at the partition groove overlap.

[0031] In this way, a locking strip extends from the end of the rigid locking sleeve, giving the locking strip both rigidity, enabling it to transmit axial pressure, and a certain degree of flexibility. Under the inward force of the compression section, it bends towards the center and presses the elastic sealing sleeve to hold the cable. Furthermore, adjacent locking strips form a mutually compressive structure at the dividing groove. Simultaneously, adjacent locking strips can also be staggered using the inclined surface of the dividing groove, allowing the circumferentially distributed locking strips to form a ring structure with a variable inner diameter, resulting in a more uniform force applied to the elastic sealing sleeve.

[0032] In this embodiment, the outer diameter of the rigid locking sleeve 42 is larger than the inner diameter of the annular step 22, and the end of the elastic sealing sleeve 41 facing the annular step 22 has a sealing gasket 43 that protrudes radially outward, the diameter of which is larger than the outer diameter of the rigid locking sleeve 42. Specifically, the rigid locking sleeve 42 includes an integrally formed support sleeve 421 and locking sleeve 422, the locking sleeve 422 being formed by the locking strips evenly distributed circumferentially; the outer wall of the locking sleeve 422 protrudes radially outward; the outer diameter of the support sleeve 421 matches the inner diameter of the inner cable outlet 21, and its length is greater than the depth from the inner cable outlet 21 to the annular step 22.

[0033] In this way, the pressure exerted by the extrusion section on the locking strip is partly applied radially to the locking strip, bending inward and compressing the elastic sealing sleeve, and partly applied axially through the circumferentially distributed locking strips to the sealing gasket, pressing the sealing gasket tightly against the annular step. The arc-shaped inner wall of the extrusion section allows the end of the locking strip to contract more smoothly inward under pressure, compressing the elastic sealing sleeve and making operation more reliable. By protruding the outer wall of the locking sleeve body outward, the radial thickness of the locking sleeve body can be increased, allowing for greater overlap between adjacent locking strips in the radial direction.

[0034] The cable outlet 2 is provided with threaded holes, which are distributed along the edge of the cable outlet 2. The sealing cover 3 has bolt holes coaxially corresponding to the threaded holes, and the fastener is a bolt that passes through the bolt holes and connects to the threaded holes. As shown in the figure, a threaded hole is provided between any two adjacent cable outlet holes 21, and each inner cable outlet hole 21 has two threaded holes distributed radially in its circumferential direction. The bolt holes have countersunk holes, and the bolts are hexagonal socket head cap bolts. In this way, the line connecting two adjacent threaded holes forms a zigzag shape, which can ensure the connection strength and reduce the use of bolts.

[0035] In use, the cable passes sequentially through the inner outlet hole, the sealing sleeve assembly, and the outer outlet hole. The sealing cover is then fitted onto the outlet seat using fasteners. At this point, the pressing part of the outer outlet hole abuts against the upper end of the sealing sleeve assembly. Because the pressing part has a gradually decreasing diameter, the force applied to the upper end of the sealing sleeve assembly compresses the assembly axially and radially. The lower end of the sealing sleeve assembly forms the first seal between itself and the annular step, while the upper end contracts inward to grip the cable, forming the second seal, thus achieving a waterproof seal for the cable and the interior of the housing. In this structure, the inner outlet holes are arranged side-by-side on the outlet seat, while the corresponding outer outlet holes are located on the sealing cover. The sealing of each cable's sealing sleeve assembly is achieved through the overall assembly of the sealing cover, eliminating the need for nuts on each cable in traditional sealing structures. This eliminates the need to consider the nut's rotation diameter and the wrench's operating space, allowing for a more compact design of the inner outlet holes and reducing the length and width of the outlet seat.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof outlet structure, characterized by comprising: The device includes a housing (1), on which a cable outlet seat (2) is provided. The cable outlet seat (2) has at least two internal cable outlet holes (21) arranged side by side. The bottom of each internal cable outlet hole (21) has an annular step (22) that protrudes radially inward. A sealing cover plate (3) is fitted on the cable outlet seat (2). The sealing cover plate (3) has an external cable outlet hole (31) that is coaxially corresponding to the internal cable outlet holes (21). A space for mounting a cable is provided between the internal cable outlet holes (21) and the external cable outlet holes (31). The sealing sleeve assembly (4) is sealed at its lower end and fits in a sealable manner on the annular step (22); the sealing cover plate (3) is detachably mounted on the cable outlet (2) by fasteners, and the end of the cable outlet hole (31) away from the cable outlet (2) has a gradually decreasing diameter extrusion part (32), which abuts against the upper end of the sealing sleeve assembly (4) when the sealing cover plate (3) is fastened, so that the sealing sleeve assembly (4) contracts inward to seal and hold the cable tightly.

2. The waterproof cable outlet structure as described in claim 1, characterized in that, The sealing sleeve assembly (4) includes an elastic sealing sleeve (41) and a rigid locking sleeve (42); one end of the elastic sealing sleeve (41) is sealed to the annular step (22), the inner diameter of the rigid locking sleeve (42) matches the outer diameter of the elastic sealing sleeve (41), and is fitted onto the elastic sealing sleeve (41); the end of the rigid locking sleeve (42) away from the annular step (22) has a locking strip extending axially, and multiple locking strips are evenly distributed along the circumference of the rigid locking sleeve (42).

3. The waterproof cable outlet structure as described in claim 2, characterized in that, The outer diameter of the rigid locking sleeve (42) is greater than the inner diameter of the annular step (22), and the elastic sealing sleeve (41) has a sealing gasket (43) that protrudes radially outward at one end facing the annular step (22), and the diameter of the sealing gasket (43) is greater than or equal to the outer diameter of the rigid locking sleeve (42).

4. The waterproof cable outlet structure as described in claim 2, characterized in that, There is an obliquely arranged partition groove between two adjacent locking bars, and their radial projections at the partition groove overlap.

5. The waterproof cable outlet structure as described in claim 4, characterized in that, The extrusion section (32) has an arc-shaped cross-section in the axial direction.

6. The waterproof cable outlet structure as described in claim 4, characterized in that, The rigid locking sleeve (42) includes an integrally formed support sleeve and a locking sleeve. The locking sleeve is formed by the locking strips evenly distributed around the periphery. The outer wall of the locking sleeve protrudes outward in the radial direction. The outer diameter of the support sleeve matches the inner diameter of the inner outlet hole (21), and its length is greater than the depth from the inner outlet hole (21) to the annular step (22).

7. The waterproof cable outlet structure as described in claim 1, characterized in that, The outlet seat (2) is provided with threaded holes, which are distributed along the edge of the outlet seat (2); the sealing cover plate (3) has bolt holes that are coaxially corresponding to the threaded holes, and the fastener is a bolt that passes through the bolt holes and is connected to the threaded holes.

8. The waterproof cable outlet structure as described in claim 7, characterized in that, A threaded hole is provided between any two adjacent outlet holes (21), and each of the inner outlet holes (21) has two threaded holes arranged radially in the circumferential direction.

9. The waterproof cable outlet structure as described in claim 8, characterized in that, The bolt hole has a countersunk hole, and the bolt is an internal hex bolt.

10. An electric motor, characterized in that, Includes the waterproof cable outlet structure as described in any one of claims 1 to 9.

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