Airtight detection plugging device for motor terminal box

Abstract

The utility model relates to motor detection technical field, specifically disclose a kind of motor junction box airtight detection plugging device, including first plug, first sealing assembly, the first plug is fixed in the cable end portion outside the junction box shell outside being connected by first sealing assembly, and the side of junction box shell is equipped with air vent;The first sealing assembly includes first upper connector and first lower connector, and the top of first upper connector is fixedly connected with first plug, and the bottom of first upper connector is threadedly connected with first lower connector, and the lower inner side of first lower connector is equipped with sealing groove, and sealing sleeve is installed in the sealing groove, and first lower connector is sealingly connected with cable by sealing sleeve.The end portion wire harness of cable is locked by first sealing assembly in the scheme, and the wire harness outer insulation skin of cable is contacted fully by sealing sleeve, so as to achieve the result that gas is not exposed, further guarantee the sealing property of motor cavity.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and in particular to a motor junction box airtightness testing and sealing device. Background Technology

[0002] Airtightness testing and sealing of motors is a post-manufacturing process primarily to ensure that the motor will not leak air during operation in special environments, such as underwater or in chemical solutions. After assembly, the motor cavity needs to be inflated using an airtightness tester according to the protection level requirements. The main leakage points in the motor cavity are concentrated in the junction box area. Because the wiring harness contains multiple copper wires, there is a gas space inside the junction box. When the internal air pressure of the motor cavity is too high, gas will leak from the cables inside the junction box to the outside, thus affecting the assessment of the motor's internal sealing. Utility Model Content

[0003] The purpose of this invention is to provide a motor junction box airtightness detection and sealing device to solve the problems encountered in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: There are two scenarios: the first is that the motor junction box has a cable on the outside, and the second is that the motor junction box does not have a cable, in which case you only need to seal the cable hole.

[0005] In the first scenario, a motor junction box airtightness testing and sealing device includes a first plug and a first sealing assembly. The first plug is fixed to the end of a cable connected to the outside of the junction box housing via the first sealing assembly. A vent is provided on one side of the junction box housing. The first sealing assembly includes a first upper connector and a first lower connector. The top of the first upper connector is fixedly connected to the first plug, and the bottom of the first upper connector is threadedly connected to the first lower connector. A sealing groove is provided on the lower inner side of the first lower connector, and a sealing sleeve is installed in the sealing groove. The first lower connector is sealed to the cable via the sealing sleeve.

[0006] In the above scheme, the top outer periphery of the first upper connector is provided with a first step that connects to the first plug, and the first step is threaded; the interior of the first upper connector is interference-fitted with the outer wall of the cable. The interior of the first plug is provided with a cavity that communicates with the middle of the first upper connector.

[0007] In the above scheme, the height dimension of the connection surface between the first upper connector and the first lower connector is smaller than the height dimension of the sealing groove. As a preferred embodiment, the height dimension of the sealing sleeve is 1 / 2 of the height dimension of the sealing groove.

[0008] In the second scenario, a motor junction box airtightness testing and sealing device includes a second plug and a second sealing assembly. The second plug is fixed to the cable through-hole of the junction box housing by the second sealing assembly. The second sealing assembly includes a second upper connector and a second lower connector. The inner hole of the second upper connector is threadedly connected to the outer wall of the second upper connector. The upper part of the inner hole of the second lower connector is sealed to the second plug by a sealing element. The lower outer periphery of the second lower connector is fixedly connected to the cable through-hole of the junction box housing.

[0009] In the above scheme, the lower outer periphery of the second upper connector is provided with a second step that connects to the cable through hole of the junction box housing, and the second step is provided with threads. The upper part of the inner hole of the second upper connector is provided with an inner pressure surface that abuts against the sealing element.

[0010] In the above scheme, the second sealing assembly further includes fasteners. Base blocks are fixed on both sides of the top of the second upper connector. The fasteners have a semi-circular structure, and the two ends of the fasteners are locked in the base blocks by screws. Anti-slip teeth are provided on the inner side of the fasteners that connects with the second plug.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In the first case, the sealing device is designed for motor junction boxes with cables on the outside. The first plug is fixed to the end of the cable connected to the outside of the junction box by the first sealing component, which blocks the leakage of the junction box. The first sealing component locks the end of the cable harness, and the sealing sleeve makes full contact with the outer insulation of the cable harness to achieve the result of preventing gas leakage, thereby further ensuring the sealing of the motor cavity.

[0012] In the second scenario, the sealing device is designed for motor junction boxes that do not include cables, only sealing the cable perforation. The second plug is fixed to the cable perforation on the junction box housing via a second sealing assembly. This second sealing assembly seals the cable perforation on the junction box housing, fulfilling the airtightness testing requirement. By locking the second plug with the second sealing assembly, the pressure deformation of the sealing element ensures full contact with the outer circumference of the second plug, preventing gas leakage and further guaranteeing the airtightness of the motor cavity. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the structure of the present invention in Embodiment 1; Figure 2 for Figure 1A structural diagram from another perspective; Figure 3 This is a schematic cross-sectional view of the present invention. Figure 4 This is a schematic diagram of the installation structure of the first sealing component in this utility model; Figure 5 This is a schematic diagram of the installation structure of the second sealing component in this utility model; Figure 6 This is a schematic diagram of the external structure of the second sealing component in this utility model; Figure 7 This is a schematic diagram of the structure of the present invention in Embodiment 2.

[0014] The following numbers are used in the diagram: 1-First plug; 11-Cavity; 2-First sealing assembly; 21-First upper connector; 22-First lower connector; 23-Sealing groove; 3-Cable; 4-Second sealing assembly; 41-Fastener; 42-Anti-slip teeth; 43-Second upper connector; 44-Inner pressure surface; 45-Second lower connector; 46-Base block; 5-Junction box housing; 51-Baffle; 52-Vent; 6-Second plug. Detailed Implementation

[0015] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0016] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] In implementation, there are two situations: the first is that the motor junction box has a cable 3 on the outside, and the second is that the motor junction box does not have a cable 3, and only the cable hole needs to be sealed.

[0019] Example 1 addresses a motor junction box with a cable 3 attached to its outer side. For example... Figure 1-3As shown, a motor junction box airtightness testing and sealing device includes a first plug 1 and a first sealing assembly 2. The first plug 1 is fixed to the end of the cable 3 connected to the outside of the junction box housing 5 via the first sealing assembly 2, thus blocking any air leakage in the junction box. A vent 52 is provided on one side of the junction box housing 5, providing a channel for introducing gas for airtightness testing. The vent 52 can be positioned... Figure 2 The baffle 51 shown can be designed with two holes, one for air inlet and the other for air outlet. The holes on both sides and in the middle of the baffle 51 are mounting holes for screws, which are used to securely fix the baffle to the end face of the junction box housing 5. A sealing ring can be installed on the fixed end face to achieve a seal.

[0020] Please see Figure 4 The first sealing assembly 2 includes a first upper connector 21 and a first lower connector 22. The top of the first upper connector 21 is fixedly connected to the first plug 1 by a thread. The bottom outer periphery of the first upper connector 21 is threadedly connected to the first lower connector 22. A sealing groove 23 is provided on the lower inner side of the first lower connector 22. A sealing sleeve is installed in the sealing groove 23. The first lower connector 22 is sealed to the cable 3 through the sealing sleeve.

[0021] After the sealing sleeve is installed, the first upper connector 21 is screwed on to bring it closer to the first lower connector 22. As the distance between the two is brought closer, the bottom of the first upper connector 21 will abut against the top of the sealing sleeve and gradually squeeze the sealing sleeve. The sealed sleeve will deform under the pressure, but the deformation is limited by the sealing groove 23. Therefore, the deformation of the sealing sleeve can only squeeze the cable 3 in the middle, thus forming a tighter effect and preventing air leakage from the motor junction box during air tightness testing.

[0022] As a preferred embodiment, the top outer periphery of the first upper connector 21 is provided with a first step that connects to the first plug 1. The first step has threads, allowing it to connect to the first plug 1 via external threads. The interior of the first upper connector 21 is press-fitted with the outer wall of the cable 3, also providing a certain degree of sealing and plugging. When a gap exists in the cable 3, a cavity 11 is formed inside the first plug 1, communicating with the middle of the first upper connector 21. This allows gas to enter the cavity 11 during airtightness testing, thereby determining whether the first sealing component 2 can completely block the leak, thus preparing for the airtightness test.

[0023] To facilitate the screwing and pulling of the first upper connector 21 and the first lower connector 22 closer together, the height of the connecting surface between the first upper connector 21 and the first lower connector 22 is smaller than the height of the sealing groove 23, ensuring sufficient contact area at the connection point. The height of the sealing sleeve is half the height of the sealing groove 23. After being squeezed by the first upper connector 21, the first upper connector 21 and the first lower connector 22 are already stably threaded together. Squeezing the sealing sleeve further stabilizes it, allowing the sealing sleeve to better fit the cable 3.

[0024] The sealing device is designed for the outer side of the motor junction box with a cable 3. The first plug 1 is fixed to the end of the cable 3 connected to the outside of the junction box housing 5 by the first sealing component 2, which blocks the leakage of the junction box. The first sealing component 2 locks the end of the cable 3 wire bundle, and the sealing sleeve makes full contact with the outer insulation of the cable 3 wire bundle, thereby achieving the result of preventing gas leakage and further ensuring the sealing of the motor cavity.

[0025] Example 2 addresses a motor junction box that does not include cable 3; only the cable penetration point is sealed. Please refer to [link / reference]. Figure 7 A motor junction box airtightness testing and sealing device includes a second plug 6 and a second sealing component 4. The second plug 6 is fixed to the cable through hole of the junction box housing 5 by the second sealing component 4, and the cable through hole of the junction box housing 5 is sealed by the second sealing component 4 to meet the airtightness testing requirements.

[0026] Please see Figure 5 and Figure 6 The second sealing assembly 4 includes a second upper connector 43 and a second lower connector 45. The inner hole of the second upper connector 43 is threaded to the outer wall of the second upper connector 43, which is an internal thread connection. The upper part of the inner hole of the second lower connector 45 is sealed to the second plug 6 through a sealing element. This sealing element and the sealing sleeve in Embodiment 1 are both made of rubber material. When the end is compressed, it will deform and squeeze the second plug 6 inward. The lower outer periphery of the second lower connector 45 is fixedly connected to the cable through hole of the junction box housing 5, which is a threaded connection.

[0027] Specifically, the lower outer periphery of the second upper connector 43 is provided with a second step that connects to the cable through-hole of the junction box housing 5. The second step has an external thread, which is used to connect with the thread at the cable through-hole of the junction box housing 5. As a preferred embodiment, the upper part of the inner hole of the second upper connector 43 is provided with an inner pressure surface 44 that abuts against the sealing element. The inner pressure surface 44 has a convex curved surface structure. During the tightening and fixing of the second upper connector 43 and the second lower connector 45, the second upper connector 43 descends and uses the inner pressure surface 44 to press against the sealing element, causing the sealing element to deform and press against the second plug 6, thus achieving a tight seal.

[0028] Furthermore, to further ensure a tight seal between the second sealing assembly 4 and the second plug 6, the second sealing assembly 4 also includes fasteners 41. Base blocks 46 are fixed to both sides of the top of the second upper connector 43, serving as supporting base points for the connection. The fasteners 41 have a semi-circular structure, similar to a clamp, with both ends of the two fasteners 41 locked into the base blocks 46 by screws. Screws are passed sequentially through one fastener 41, the base block 46, and the fastener 41 on the other side, and then secured with nuts, causing the fasteners 41, the base block 46, and the fastener 41 on the other side to press inwards, thereby sealing and tightening the enclosed second plug 6. As a preferred embodiment, anti-slip teeth 42 are provided on the inner surface of the fastener 41 where it connects with the second plug 6, providing an anti-slip seal and preventing slippage after tightening, thus better securing the second plug 6.

[0029] This sealing device is designed for motor junction boxes that do not include cables 3, where only the cable perforation is sealed. The second plug 6 is fixed to the cable perforation on the junction box housing 5 via the second sealing component 4. The second sealing component 4 seals the cable perforation on the junction box housing 5, thus fulfilling the airtightness test requirement. By locking the second plug 6 with the second sealing component 4, the pressure deformation of the sealing element ensures full contact with the outer circumference of the second plug 6, achieving the result of preventing gas leakage and further guaranteeing the airtightness of the motor cavity.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. These undisclosed elements are all prior art known to those skilled in the art.

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A device for airtightness testing and sealing of a motor junction box, characterized in that: The first plug (1) and the first sealing assembly (2) are included. The first plug (1) is fixed to the end of the cable (3) connected to the outside of the junction box housing (5) by the first sealing assembly (2). A vent (52) is provided on one side of the junction box housing (5). The first sealing assembly (2) includes a first upper connector (21) and a first lower connector (22). The top of the first upper connector (21) is fixedly connected to the first plug (1). The bottom of the first upper connector (21) is threadedly connected to the first lower connector (22). A sealing groove (23) is provided on the lower inner side of the first lower connector (22). A sealing sleeve is installed in the sealing groove (23). The first lower connector (22) is sealed to the cable (3) by the sealing sleeve.

2. The airtightness testing and sealing device for a motor junction box according to claim 1, characterized in that: The top outer periphery of the first upper connector (21) is provided with a first step that connects to the first plug (1), and the first step is provided with threads; the interior of the first upper connector (21) is interference-fitted with the outer wall of the cable (3).

3. The airtightness detection and sealing device for a motor junction box according to claim 2, characterized in that: The first plug (1) has a cavity (11) that communicates with the middle part of the first upper connector (21).

4. The airtightness testing and sealing device for a motor junction box according to claim 1, characterized in that: The height dimension of the connection surface between the first upper connector (21) and the first lower connector (22) is smaller than the height dimension of the sealing groove (23); the height dimension of the sealing sleeve is 1 / 2 of the height dimension of the sealing groove (23).

5. A device for airtightness testing and sealing of a motor junction box, characterized in that: The device includes a second plug (6) and a second sealing assembly (4). The second plug (6) is fixed to the cable through hole of the junction box housing (5) by the second sealing assembly (4). The second sealing assembly (4) includes a second upper connector (43) and a second lower connector (45). The inner hole of the second upper connector (43) is threaded to the outer wall of the second upper connector (43). The upper part of the inner hole of the second lower connector (45) is sealed to the second plug (6) by a sealing element. The lower outer periphery of the second lower connector (45) is fixedly connected to the cable through hole of the junction box housing (5).

6. The airtightness testing and sealing device for a motor junction box according to claim 5, characterized in that: The lower outer periphery of the second upper connector (43) is provided with a second step that connects to the cable through hole of the junction box housing (5), and the second step is provided with threads.

7. The airtightness testing and sealing device for a motor junction box according to claim 5, characterized in that: The upper part of the inner hole of the second upper connector (43) is provided with an inner pressure surface (44) that abuts against the seal.

8. The airtightness testing and sealing device for a motor junction box according to claim 5, characterized in that: The second sealing assembly (4) also includes fasteners (41), and base blocks (46) are fixed on both sides of the top of the second upper connector (43). The fasteners (41) are semi-circular structures, and the two ends of the fasteners (41) are locked in the base blocks (46) by screws.

9. The airtightness testing and sealing device for a motor junction box according to claim 8, characterized in that: The inner side of the fastener (41) is provided with anti-slip teeth (42) on the surface that connects with the second plug (6).

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