Cable connection device for electric machine, electric machine and method for connecting cables of electric machine

Abstract

The invention discloses a cable connection device (11) for a motor (1), and the device comprises a cover (111) which is used for covering a wiring cavity (121) which is formed in a housing (12) of the motor and is open outwards, and is provided with a channel (1111) for a cable (13) to pass through; the sealing structure (112) is configured to be capable of sealing a gap between the cable and the channel from one end of the cover when the cover sleeves the cable through the channel; and the cable connecting device is configured to allow one end of the cable to pass through the channel, so that the other end of the cover cap is fixed on the shell under the condition that the other end of the cable is connected with the wiring cavity, and the gap is sealed through the sealing structure to realize external sealing of the wiring cavity. A corresponding electric machine and a method for connecting cables of an electric machine are also disclosed. According to some exemplary embodiments, the cable connecting device is simple and reliable in structure, easy to assemble, and convenient for operators to install, maintain, replace and the like.

Description

Technical Field

[0001] The invention relates to a cable connection device for an electric machine, a corresponding electric machine and a corresponding method for connecting a cable of an electric machine. Background Art

[0002] At present, motors are widely used in various fields, especially for providing rotational motion. Motors need cables to provide them with electrical energy and / or possible control. Most of the existing cable connections are connected to the motor before the motor is assembled. The cable length needs to be estimated, which is not conducive to the subsequent overall assembly. Moreover, during the subsequent maintenance process, this method requires opening the motor housing and disassembling the internal wiring terminals and other structures. The process is cumbersome and has safety hazards.

[0003] Other cable connection methods are also relatively complicated and have many problems. For this reason, corresponding improvements need to be made. Summary of the invention

[0004] In order to overcome at least one of the above disadvantages and / or other possible disadvantages that may not be mentioned here, the object of the present invention is to provide an improved cable connection device for a motor, a corresponding motor and a corresponding method for connecting a cable of a motor.

[0005] According to a first aspect of the present invention, there is provided a cable connection device for a motor, comprising: a cover, the cover being configured to cover an outwardly open wiring cavity formed on a housing of the motor and being provided with a passage for the cable to pass through; and a sealing structure, the sealing structure being configured to seal a gap between the cable and the passage from one end of the cover when the cover is sleeved on the cable through the passage; wherein the cable connection device is configured to allow one end of the cable to pass through the passage, so that when the other end of the cable is connected to the wiring cavity, the other end of the cover is fixed to the housing, and the wiring cavity is sealed from the outside by sealing the gap through the sealing structure.

[0006] According to an optional embodiment of the present invention, the cover is configured to be slidably mounted on the cable through the channel.

[0007] According to an optional embodiment of the present invention, the cable is connected to a wiring terminal disposed in the wiring cavity via a connector located at one end of the cable.

[0008] According to an optional embodiment of the present invention, the cover is configured such that when the cover is sleeved onto the cable through the passage, the cover at least cannot slide away from the connector and detach from the cable.

[0009] According to an optional embodiment of the present invention, the cover is configured as a single piece.

[0010] According to an optional embodiment of the present invention, the cover includes a base having a first end and a second end opposite to the first end, and a cylinder extending obliquely from the base away from the first end, the hollow portion of the cylinder defines the channel, and the cover is fixed to the shell through the base.

[0011] According to an optional embodiment of the present invention, the sealing structure is configured as a cable gland, which is used to be sleeved on the cable and can be threadedly engaged with an end of the cylinder away from the base.

[0012] According to an optional embodiment of the present invention, the barrel extends beyond the second end.

[0013] According to an optional embodiment of the present invention, the base has a substantially rectangular shape and is suitable for being fixedly connected to the housing at four corners of the rectangle.

[0014] According to an optional embodiment of the present invention, the two corners at the first end are configured to be fixed to the housing by bolts, and the two corners at the second end are configured to be fixed to the housing by a snap-fit ​​structure.

[0015] According to an optional embodiment of the present invention, the buckle structure is configured as a sliding buckle structure.

[0016] According to an optional embodiment of the present invention, the sliding buckle structure includes a sliding groove or a protrusion suitable for slidably engaging with a matching structure formed on the shell.

[0017] According to an optional embodiment of the present invention, the base is configured to be suitable for first sliding and snapping the second end onto the shell, and then fixing the first end onto the shell by bolts.

[0018] According to an optional embodiment of the present invention, the cable connecting device further comprises a sealing gasket located between the base and the shell.

[0019] According to a second aspect of the present invention, a motor is provided, wherein the motor comprises a cable connection device for a motor according to any one of the above embodiments.

[0020] According to an optional embodiment of the present invention, the housing is a controller housing of the motor.

[0021] According to an optional embodiment of the present invention, the wiring cavity is configured to be recessed.

[0022] According to an optional embodiment of the present invention, the controller housing has two side surfaces which are arranged adjacent to each other in the circumferential direction to form a corner, and the cable connecting device is fixed on one of the two side surfaces and partially extends beyond the other of the two side surfaces.

[0023] According to a third aspect of the present invention, there is provided a method for connecting a cable of a motor according to any one of the above-mentioned embodiments, the method comprising at least the following steps: connecting a connector of the cable to a wiring cavity; fixing a cover to the housing; and operating a sealing structure to seal a gap between the cable and a channel of the cover to complete sealing the wiring cavity from the outside.

[0024] According to an optional embodiment of the present invention, the method further includes: passing the cable through the channel from one end thereof so that the cover is sleeved on the cable; and sliding the cover along the extension direction of the cable until the base of the cover contacts or fits with the corresponding surface of the shell.

[0025] According to an optional embodiment of the present invention, after the cover and the shell are snapped into place, the cover is fixed to the shell by bolts.

[0026] According to some exemplary embodiments of the present invention, the cable connection device has a simple structure, is reliable, and is easy to assemble. In addition, the cable connection device can also be ergonomically arranged on the housing of the motor, making it convenient for operators to install, maintain, and replace the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below with reference to the accompanying drawings in combination with exemplary embodiments, so that the principles, features and advantages of the present invention can be better understood. The accompanying drawings include:

[0028] Figure 1 A perspective view of an electric machine according to an exemplary embodiment of the present invention is shown.

[0029] Figure 2 Shows Figure 1 An exploded perspective view of the motor shown.

[0030] Figure 3 Shows Figure 1 A top view of the motor is shown.

[0031] Figure 4 Shows Figure 2 An exploded top view of the motor.

[0032] Figure 5 A flow chart of a method for connecting cables of an electric machine according to an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the scope of protection of the present invention.

[0034] Figure 1 A perspective view of an electric machine according to an exemplary embodiment of the present invention is shown.

[0035] Figure 2 Shows Figure 1 An exploded perspective view of the motor shown.

[0036] Figure 3 Shows Figure 1 A top view of the motor is shown.

[0037] Figure 4 Shows Figure 2 An exploded top view of the motor.

[0038] The centralized display of these drawings can better enable those skilled in the art to quickly understand the basic concepts of the present invention. Below, a more detailed description will be slowly unfolded in conjunction with the drawings to better present the present invention. However, it is understood that for the sake of clarity and simplicity and because the figure marks are limited by the marking space in each figure, multiple figures can be simultaneously understood in the following description when necessary. However, it can be understood by those skilled in the art that this combined understanding does not mean that all features in each figure should appear in the same embodiment, on the contrary, as long as they are not mutually exclusive technically, they can be combined in any suitable manner. Moreover, for the sake of simplicity, different embodiments of different aspects may be presented in the same specific design, but this presentation does not mean that the embodiments of these aspects should appear together. The disassembly and / or combination of all possible embodiments and / or technical features should also take into account the description of the specification and the content that can be directly and unambiguously determined by those skilled in the art based on the description of the specification.

[0039] In addition, due to the limitation of the angle of the drawings, the number of certain structures and components described in the text of this article cannot completely correspond to those shown in the drawings, but this will not affect the understanding of those skilled in the art. Moreover, it should be pointed out that the marking of the lead with the reference mark in the drawings refers to the area to which the end of the lead points, and cannot be simply interpreted as a point at the end.

[0040] First, refer to Figure 1-Figure 4According to the subject of the first aspect of the present invention, there is provided a cable connection device 11 for a motor 1, the cable connection device 11 comprising: a cover 111, the cover 111 being configured to cover a wiring cavity 121 formed on a housing 12 of the motor 1 and open outwards, and having a passage 1111 for the cable 13 to pass through; and a sealing structure 112, the sealing structure 112 being configured to be able to seal from one end, i.e., the outer end, of the cover 111 when the cover 111 is sleeved on the cable 13 through the passage 1111. The invention relates to sealing the gap between the cable 13 and the channel 1111, and in particular to sealing the gap between the cable 13 and the channel 1111 after the cover 111 is fixed on the shell 12 and covers the wiring cavity 121, wherein the cable connecting device 11 is configured to allow one end of the cable 13 to pass through the channel 1111, so that when the other end of the cable 13 is connected to the wiring cavity 121, the other end, i.e., the inner end, of the cover 111 is fixed on the shell 12, and the gap is sealed by the sealing structure 112 to seal the wiring cavity 121 from the outside.

[0041] As a more specific embodiment, after the connector 131 of the cable 13 is connected to the wiring terminal 122 (only one is marked in the figure due to the viewing angle) arranged in the wiring cavity 121, the cover 111 is fixed to the shell 12, and then the gap is sealed by the sealing structure 112 to achieve the sealing of the wiring cavity 121 from the outside.

[0042] The motor 1 mainly realizes a reliable connection between the cable 13 and the terminal 122 of the motor 1 through the cable connection device 11, and in particular, can also seal the electrical connection to ensure electrical safety, especially to prevent water from entering the wiring cavity 121. Here, "housing" can refer to any exposed part of the motor. Regarding "gap", only Figure 4 It is schematically shown by a dotted line, which may refer to any gap leading to the wiring cavity 121 caused by the cable 13 penetrating the cover 111. In addition, it can be seen that the cable connection device 11 allows the cable 13 to be connected to the wiring terminal 122 first, and then the wiring cavity 121 provided with the wiring terminal 122 is covered with the cover 111, and then the gap in the area where the cable 13 passes through the cover 111 is sealed. This assembly follows the order from inside to outside as a whole, which is very convenient for operators to implement.

[0043] According to an exemplary embodiment of the present invention, the cover 111 is configured to be slidably mounted on the cable 13 through the channel 1111. In this way, the length of the cable 13 in the wiring cavity 121 can be conveniently adjusted during and / or after the installation of the cover 111, and the cover 111 can be slid away from the wiring cavity 121 along the cable 13 when connecting the cable 13 to the wiring terminal 122, which makes it easy to make room for connecting the cable 13 to the wiring terminal 122.

[0044] Further, the cover 111 can be configured such that: when the cover 111 is mounted on the cable 13 through the channel 1111, the cover 111 at least cannot slide away from the cable 13 from the connector 131, and in particular cannot slide away from the cable 13 from both ends of the cable 13. Figure 2 As shown in the figure, the size of the connector 131 is larger than the inner diameter of the channel 1111, so that the cover 111 can be prevented from being separated from the end with the connector 131. In practice, connectors are usually provided at both ends of the cable 13 to facilitate connection. In this way, the cover 111 can be reliably held on the cable 13 when both ends of the cable 13 are equipped with corresponding connectors. The connector 131 can be of any form, and the maximum radial dimension is usually larger than the outer diameter of the cable 13.

[0045] Advantageously, the cover 111 can be configured as an integral part, especially an integrally formed part. This construction method greatly simplifies the installation operation, and the cover 111 only needs to be fixed to the housing 12 to achieve the cover of the wiring cavity 121, leaving only a small gap to be sealed later. This integrated structural design greatly reduces the parts that need to be sealed, and also reduces the risk of product component failure caused by multiple sealing requirements and cumbersome assembly procedures, effectively reducing the production cost.

[0046] Especially if Figure 1 and Figure 2 As shown, according to an exemplary embodiment of the present invention, the cover 111 includes a base 1112 having a first end 11121 and a second end 11122 opposite to the first end 11121, and a barrel 1113 extending obliquely from the base 1112 away from the first end 11121, wherein the hollow portion of the barrel 1113 defines a channel 1111, and the cover 111 is fixed to the shell 12 via the base 1112.

[0047] Specifically, the cylinder 1113 (specifically, the central axis thereof) can be tilted between 0-90 degrees relative to the plane of the base 1112, such as 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, etc. Generally speaking, about 30 degrees is more suitable. On the one hand, when the operator finally fixes the sealing structure 112, the operating angle is not very skewed, which is convenient for installation and maintenance. On the other hand, the composite busbar in the motor will be staggered with sufficient distribution gap inside the ECU to facilitate internal wiring.

[0048] By slanting the cylinder 1113, the cable 13 extends in a radial shape, thereby preventing the end of the cable 13 close to its connector from bending at a large angle as soon as it extends out of the shell, thereby avoiding wear due to bending force and shortening the service life of the cable 13. In particular, as mentioned above, the inclined structure also makes the assembly of the cable 13 ergonomic and convenient for operation and maintenance.

[0049] According to an exemplary embodiment of the present invention, the sealing structure 112 is configured as a gland, which is used to be sleeved on the cable 13 and can be threadedly engaged with an end of the cylinder 1113 away from the base 1112. For example, a threaded hole can be provided at the end of the cylinder 1113, and the gland can be screwed into the threaded hole. The gland can lock the cable 13 through the gland, so that the cable 13 does not produce axial displacement and radial rotation, and can seal any gap between the cable 13 and the channel 1111, so as to achieve the desired connection state of the cable.

[0050] In some exemplary embodiments, when the cable 13 is passed through the channel 1111 from one end of the base 1112 of the cover 111, the sealing structure 112 has been partially screwed into the barrel 1113 of the cover 111 through a thread, that is, the cable 13 is passed through the cover 111 and the sealing structure 112 that are connected to each other, and after the cover 111 is fixed to the shell 12, the sealing structure 112 is completely tightened to achieve sealing.

[0051] In some other exemplary embodiments, the cable 13 may also be passed through the separate cover 111 and the sealing structure 112 in sequence, and then the sealing structure 112 is connected to the cover 111 to achieve sealing.

[0052] Especially if Figure 1 and Figure 2 As shown, the barrel 1113 extends beyond the second end 11122, that is, beyond the end to which the oblique extension is biased, so that it is easy to operate the sealing structure 112 to lock it and achieve sealing. Specifically, along the direction parallel to the plane of the base 1112, the barrel 1113 extends beyond the boundary defined by the second end 11122 of the base 1112. In this case, if viewed along a direction perpendicular to the base 1112, a portion of the barrel 1113 is located outside the second end 11122 of the base 1112.

[0053] Preferably, the cover 111, in particular the cylinder 1113 (its axis) and / or the base 1112 (its length direction) are perpendicular to the rotation axis of the motor, which can be clearly seen from the figure and will not be described in detail here.

[0054] The base 1112 and the opening of the wiring cavity 121 on the housing 12 of the motor may have a matching shape. Figure 1-Figure 4It can be seen that according to an exemplary embodiment of the present invention, the base 1112 has a generally rectangular shape and is suitable for being fixedly connected to the housing 12 at the four corners of the rectangle. "Generally rectangular" means that the shape is rectangular or close to a rectangle, and it cannot be required to be a rectangle in the strict sense. For the rectangular base 1112, by fixing it at the four corners, the base 1112 can be firmly fixed to the housing 12, which is particularly conducive to ensuring the sealing between them. In other embodiments, the openings of the wiring cavity 121 on the base 1112 and the housing 12 of the motor can both be other shapes, such as an oblong shape.

[0055] Especially if Figure 2 As shown, the cable connection device 11 may further include a sealing pad 115 between the base 1112 and the housing 12. The sealing pad 115, combined with the fixing effect of the four corners, can well ensure the sealing of the joint between the base 1112 and the housing 12.

[0056] According to an exemplary embodiment of the present invention, the two corners 11123 at the first end 11121 are configured to be fixed to the housing 12 by bolts 113, while the two corners at the second end 11122 (not marked in the figure for the sake of simplicity and due to the problem of viewing angle occlusion) are not marked in the figure. Figure 1 and Figure 2 Only one can be seen in the figure) is configured to be fixed to the housing 12 through a snap-fit ​​structure 114. This fixing method can facilitate installation and simplify the assembly operation. In particular, if the snap-fit ​​structure 114 is configured as a sliding snap-fit ​​structure, the two corners at the second end 11122 can be snap-fitted into place by sliding, and then the hole on the first end 11121 for receiving the bolt 113 can be aligned with the corresponding threaded hole on the housing 12, and then the bolt 113 can be screwed in to achieve fixation.

[0057] Those skilled in the art will appreciate that this is just one possible fixing method, and how to fix the base 1112 to the shell 12 can be designed and adjusted according to specific circumstances, and the present invention does not impose any limitation on this.

[0058] For the sliding buckle structure, it may include a slide groove 1141 or a protrusion adapted to be slidably engaged with the matching structure 123 formed on the housing 12. Figure 2 As shown, a slide groove 1141 is provided on the base 1112 (due to the viewing angle, only the fine structure can be seen from the end face, but a person skilled in the art can understand this), and a protrusion is provided on the shell 12, and vice versa.

[0059] According to a second aspect of the present invention, there is provided an electric machine 1 , which comprises a cable connection device 11 according to any one of the above embodiments.

[0060] According to an exemplary embodiment of the present invention, the housing 12 is a housing of a controller of the motor 1. The controller may include an inverter.

[0061] Especially if Figure 2 As shown, according to an exemplary embodiment of the present invention, the wiring cavity 121 is configured as a recessed type.

[0062] According to an exemplary embodiment of the present invention, Figure 1-Figure 4 As shown, the controller housing has two side surfaces which are arranged adjacent to each other in the circumferential direction to form a corner 124, and the cable connecting device 11 is fixed on one of the two side surfaces and partially extends beyond the other of the two side surfaces.

[0063] In particular, the controller housing is square in shape as a whole and has four side surfaces in the circumferential direction, and the four side surfaces are substantially perpendicular to each other.

[0064] The cable connection device 11 is preferably arranged at the corner 124. In this case, the second end 11122 of the base 1112 is arranged adjacent to the corner 124. This arrangement conforms to the ergonomic design and is convenient for the operator to disassemble and assemble.

[0065] According to the third aspect of the present invention, Figure 5 As shown, a method for connecting a cable 13 of a motor 1 according to any of the above exemplary embodiments is provided, the method comprising at least the following steps: S1) connecting a connector 131 of the cable 13 to a wiring cavity 121, in particular, to a wiring terminal 122 arranged in the wiring cavity 121; S2) fixing the cover 111 to the housing 12; and S3) operating the sealing structure 112 to seal a gap between the cable 13 and the channel 1111 of the cover 111 to complete sealing the wiring cavity 121 from the outside.

[0066] As described above, in steps S1 and / or S2 , it may also be necessary to slide the cover 111 on the cable 13 relative to the cable 13 .

[0067] As a more specific installation process, the sealing gasket 115 can be placed on the shell 12 first, and then the connector 131 of the cable 13 is connected, and then the cover 111 is slid along the cable 13 until the snap-fit ​​structure 114 of the cover 111 snaps into place with the matching structure 123 on the shell 12. At this time, the cover 111 can be fixed to the shell 12 using bolts 113, and then the sealing structure 112 can be fixed to the cover 111 to seal the gap between the cable 13 and the channel 1111, thereby sealing the wiring chamber 121 from the outside.

[0068] Those skilled in the art will appreciate that the cover 111 may be put on the cable 13 after step S1 and before step S2, or the cover 111 may be put on the cable 13 before step S1 (especially when the length of the cable 13 is sufficient).

[0069] Although specific embodiments of the present invention are described in detail herein, they are provided for the purpose of explanation only and should not be considered to limit the scope of the present invention. Various substitutions, changes and modifications may be conceived without departing from the spirit and scope of the present invention.

[0070] Reference numerals list

[0071] 1 Motor

[0072] 11 Cable connection device

[0073] 111 Cover

[0074] Channel 1111

[0075] 1112 Base

[0076] 11121 First End

[0077] 11122 Second end

[0078] 11123 Corner

[0079] 1113 Cylinder

[0080] 112 Sealing structure

[0081] 113 Bolt

[0082] 114 Buckle structure

[0083] 1141 Chute

[0084] 115 Gasket

[0085] 12 Housing

[0086] 121 Wiring compartment

[0087] 122 Terminal Blocks

[0088] 123 Matching structure

[0089] 124 Corner

[0090] 13 Cable

[0091] 131 Connector

Claims

1. A cable connection device (11) for a motor (1), comprising: a cover (111), the cover (111) being configured to cover a wiring cavity (121) formed on a housing (12) of the motor (1) and open outward, and having a passage (1111) for the cable (13) to pass through; and A sealing structure (112), wherein the sealing structure (112) is configured to seal a gap between the cable (13) and the channel (1111) from one end of the cover (111) when the cover (111) is sleeved onto the cable (13) through the channel (1111); The cable connection device (11) is configured to allow one end of the cable (13) to pass through the channel (1111), so that when the other end of the cable (13) is connected to the wiring cavity (121), the other end of the cover (111) is fixed to the housing (12), and the gap is sealed by the sealing structure (112) to seal the wiring cavity (121) from the outside.

2. The cable connection device (11) for an electric machine (1) according to claim 1, wherein: The cover (111) is configured to be slidably mounted on the cable (13) through the channel (1111).

3. The cable connection device (11) for an electric machine (1) according to claim 2, wherein: The cable (13) is connected to a wiring terminal (122) disposed in the wiring cavity (121) via a connector (131) located at one end thereof; The cover (111) is configured such that when the cover (111) is sleeved onto the cable (13) through the passage (1111), the cover (111) at least cannot slide off the connector (131) and detach from the cable (13).

4. A cable connection device (11) for a motor (1) according to any one of claims 1 to 3, wherein: The cover (111) is configured as a single piece.

5. A cable connection device (11) for a motor (1) according to any one of claims 1 to 4, wherein: The cover (111) comprises a base (1112) having a first end (11121) and a second end (11122) opposite to the first end (11121), and a cylinder (1113) extending obliquely from the base (1112) away from the first end (11121), wherein a hollow portion of the cylinder (1113) defines the channel (1111), and the cover (111) is fixed to the shell (12) via the base (1112).

6. The cable connection device (11) for an electric machine (1) according to claim 5, wherein: The sealing structure (112) is configured as a cable gland, which is used to be mounted on the cable (13) and can be threadedly engaged with an end of the cylinder (1113) away from the base (1112); and / or The barrel (1113) extends beyond the second end (11122).

7. A cable connection device (11) for an electric machine (1) according to claim 5 or 6, wherein: The base (1112) has a generally rectangular shape and is adapted to be fixedly connected to the housing (12) at the four corners of the rectangle.

8. The cable connection device (11) for an electric machine (1) according to claim 7, wherein: The two corners (11123) at the first end (11121) are configured to be fixed to the housing (12) by bolts (113); and The two corners at the second end (11122) are configured to be suitable for being fixed to the shell (12) through a snap-fit ​​structure (114).

9. The cable connection device (11) for an electric machine (1) according to claim 8, wherein: The buckle structure (114) is configured as a sliding buckle structure.

10. The cable connection device (11) for an electric machine (1) according to claim 9, wherein: The sliding buckle structure comprises a sliding groove (1141) or a protrusion adapted to be slidably engaged with a matching structure (123) formed on the housing (12); and / or The base (1112) is configured to be suitable for first sliding and snapping the second end (11122) onto the shell (12), and then fixing the first end (11121) to the shell (12) via a bolt (113).

11. A cable connection device (11) for a motor (1) according to any one of claims 1 to 10, wherein: The cable connection device (11) further comprises a sealing gasket (115) located between the base (1112) and the housing (12).

12. An electric machine (1), wherein: The electric machine (1) comprises a cable connection device (11) for the electric machine (1) according to any one of claims 1 to 11.

13. The electric machine (1) according to claim 12, wherein: The housing (12) is a controller housing of the motor (1); and / or The wiring cavity (121) is configured to be concave.

14. The electric machine (1) according to claim 13, wherein: The controller housing has two side surfaces which are arranged adjacent to each other in the circumferential direction to form a corner (124), and the cable connection device (11) is fixed on one of the two side surfaces and partially extends beyond the other of the two side surfaces.

15. A method for connecting a cable (13) of an electric machine (1) according to any one of claims 12 to 14, the method comprising at least the following steps: Connecting the connector (131) of the cable (13) into the wiring cavity (121); fixing the cover (111) to the housing (12); and The sealing structure (112) is operated to seal the gap between the cable (13) and the channel (1111) of the cover (111), thereby completing the sealing of the wiring chamber (121) from the outside.

16. The method according to claim 15, wherein: The method further comprises: Passing the cable (13) through the passage (1111) from one end thereof so that the cover (111) is sleeved on the cable (13); and The cover (111) is slid along the extension direction of the cable (13) until the base (1112) of the cover (111) contacts or fits with the corresponding surface of the housing (12).

17. The method according to claim 15 or 16, wherein: After the cover (111) and the housing (12) are snapped into place, the cover (111) is fixed to the housing (12) by means of bolts (113).

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