Junction box, motor and vehicle

Abstract

The utility model provides a junction box, a motor and a vehicle, the junction box comprises a junction box body, and a sealing gasket and a pressing member which are arranged in the junction box body, a first hollow area is formed on the junction box body, the pressing member is used for pressing the sealing gasket on the junction box body so that the first hollow area is blocked by the sealing gasket, and the first hollow area is sealed by the pressing member. A wire passing hole is formed in the sealing gasket, a lead sequentially passes through the first hollow area and the wire passing hole to enter the junction box body, the lead is in sealed connection with the hole wall of the wire passing hole, and the end, located in the junction box body, of the lead is connected with a wiring terminal. According to the utility model, the independent closed space is created in the junction box body, so that water vapor entering the motor cavity through the waterproof ventilation valve can be prevented from diffusing into the junction box body, and condensation is further prevented from being separated out due to surface cooling of the metal wiring terminal; and finally, the condition of insulation failure or short circuit caused by condensation is completely eradicated.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioning, and in particular relates to a junction box, a motor and a vehicle. Background Art

[0002] To ensure both waterproofing and balancing cabin pressure fluctuations caused by alternating hot and cold weather, the drive motors of new energy vehicles typically require a waterproof breathable valve installed on the motor surface. However, the waterproof breathable valve itself cannot prevent water vapor carried by humid air from entering the motor cavity. Therefore, after long-term operation, condensation may occur in the junction box, causing insulation failure or short circuits in the terminal blocks. This has become a common pain point in the industry. Currently, to minimize the adverse effects of water vapor entering the junction box, the industry mainly uses the following two technical methods:

[0003] 1. Paste or spray insulation material on the inner wall of the terminal box to minimize the temperature change rate of the terminal, thereby minimizing the risk of water droplets precipitating on the terminal surface due to sudden temperature drops. However, the formation of water droplets is inevitable over time because the water vapor in the cavity will continuously enter and exit the motor cavity due to pressure changes in the cavity;

[0004] 2. Install an external drying device. Although this can dry the incoming air, it cannot guarantee the IP68 waterproof rating because the desiccant as a filter medium itself does not have a waterproof function. At the same time, it will soon become ineffective due to excessive water absorption if it works in a humid environment for a long time. Utility Model Content

[0005] Therefore, the present invention provides a junction box that can solve the technical problem that the technical means adopted in the prior art cannot effectively reduce the entry of water vapor into the junction box, thereby easily causing insulation failure or short circuit of the connection terminals in the junction box.

[0006] In order to solve the above problems, the utility model provides a junction box, including a junction box body and a sealing gasket and a pressing member arranged in the junction box body, a first hollow area is formed on the junction box body, and the pressing member is used to press the sealing gasket onto the junction box body so that the sealing gasket blocks the first hollow area, and a wire passing hole is constructed on the sealing gasket. The lead wire passes through the first hollow area and the wire passing hole in turn into the interior of the junction box body, and the lead wire is sealed with the hole wall of the wire passing hole, and one end of the lead wire located in the junction box body is connected to a wiring terminal.

[0007] In some embodiments, a boss is provided on the inner surface of the junction box body, and an avoidance hole is constructed on the sealing gasket that passes through the sealing gasket. When the pressing member presses the sealing gasket onto the junction box body so that the sealing gasket blocks the first hollow area, the boss is inserted into the avoidance hole and the boss abuts the pressing member.

[0008] In some embodiments, there are multiple first hollow areas, and the first hollow areas are spaced apart in sequence on the junction box body. A support bridge is formed between two adjacent first hollow areas, and the convex column is provided on each support bridge. There are multiple wire holes, and the positions of the wire holes correspond to the positions of the first hollow areas.

[0009] In some embodiments, a first threaded hole is constructed on the junction box body, a socket penetrating the sealing gasket is constructed on the sealing gasket, a second threaded hole penetrating the pressing member is constructed on the clamping member, and the fastener is threadedly connected to the second threaded hole, passes through the socket, and is threadedly connected to the first threaded hole so that the clamping member presses the sealing gasket onto the junction box body.

[0010] In some embodiments, the bosses are provided on both sides of the first threaded hole, the avoidance holes are provided on both sides of the insertion hole, the two bosses are respectively inserted into the two avoidance holes, and the two bosses both abut against the pressing member.

[0011] In some embodiments, the insertion hole is communicated with the avoidance hole.

[0012] In some embodiments, a recessed area is formed on the sealing gasket, the wire hole is constructed in the recessed area, and a second hollow area is formed on the pressing member. When the pressing member presses the sealing gasket onto the junction box body so that the sealing gasket blocks the first hollow area, the positions of the first hollow area and the second hollow area correspond to the position of the recessed area.

[0013] In some embodiments, the sealing gasket has a raised portion, the wire hole passes through the raised portion, and the raised portion passes through the second hollow area.

[0014] The utility model also provides a motor, comprising the above-mentioned junction box.

[0015] The utility model also provides a vehicle, comprising the aforementioned motor.

[0016] The utility model provides a junction box, a motor, and a vehicle, which have the following beneficial effects:

[0017] The present application uses a pressing piece to press the sealing gasket onto the junction box body so that the sealing gasket blocks the first hollow area on the junction box body, and at the same time, the lead wire introduced into the junction box body is sealed with the hole wall of the wire hole on the sealing gasket, thereby creating an independent closed space in the junction box body, which can prevent water vapor entering the motor cavity through the waterproof breathable valve from diffusing into the junction box body, thereby avoiding condensation due to cooling of the metal terminal surface, and ultimately eliminating insulation failure or short circuit caused by condensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0019] Figure 1 This is a structural diagram of a junction box installed on a motor according to an embodiment of the utility model;

[0020] Figure 2 This is an exploded schematic diagram of a junction box according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 An enlarged schematic diagram of point A of the junction box of an embodiment of the present utility model;

[0022] Figure 4 This is a schematic structural diagram of a sealing gasket of a junction box according to an embodiment of the present utility model;

[0023] Figure 5 A top view of a sealing gasket of a junction box according to an embodiment of the present utility model;

[0024] Figure 6 A half-sectional view of a sealing gasket of a junction box according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic structural diagram of a compression member of a junction box according to an embodiment of the present utility model;

[0026] Figure 8 This is a top view of the pressing member of the junction box according to an embodiment of the present utility model.

[0027] The reference numerals indicate:

[0028] 1. Junction box body; 2. Sealing gasket; 3. Pressing piece; 4. First hollow area; 5. Wire hole; 6. Lead wire; 7. Terminal; 8. Boss; 9. Avoidance hole; 10. Support bridge; 11. First threaded hole; 12. Second threaded hole; 13. Socket; 14. Recessed area; 15. Second hollow area; 16. Raised part; 17. Fastener; 18. Waterproof breathable valve; 19. Hot melt adhesive layer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0033] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, a junction box is provided, comprising a junction box body 1 and a sealing gasket 2 and a pressing member 3 arranged in the junction box body 1, a first hollow area 4 is formed on the junction box body 1, the pressing member 3 is used to press the sealing gasket 2 onto the junction box body 1 so that the sealing gasket 2 blocks the first hollow area 4, a wire hole 5 is constructed on the sealing gasket 2, the lead 6 passes through the first hollow area 4 and the wire hole 5 in turn into the interior of the junction box body 1, and the lead 6 is sealedly connected to the hole wall of the wire hole 5, and one end of the lead 6 located in the junction box body 1 is connected to the terminal 7.

[0034] In this technical solution, a pressing member 3 is used to press the sealing gasket 2 against the junction box body 1 so that the sealing gasket 2 blocks the first hollow area 4 on the junction box body 1. At the same time, the lead wire 6 introduced into the junction box body 1 is sealed to the wall of the wire hole 5 on the sealing gasket 2, thereby creating an independent closed space within the junction box body 1. This can prevent moisture entering the motor cavity through the waterproof breathable valve 18 from diffusing into the junction box body 1, thereby avoiding condensation due to cooling on the surface of the metal terminal 7, and ultimately eliminating insulation failure or short circuit caused by condensation. A hot melt adhesive layer 19 is affixed to the wall of the wire hole 5, and the hot melt adhesive layer 19 is melted using a hot air gun to achieve a sealed connection between the lead wire 6 and the wall of the wire hole 5.

[0035] It should be noted that Figure 1 The figure shows a schematic diagram of the junction box with the cover removed. The cover is removed to show the internal structure of the junction box to facilitate understanding of this solution. After the cover is assembled on the junction box, the interior of the junction box becomes an independent enclosed space.

[0036] See also Figure 2 and Figure 3 As shown, a boss 8 is provided on the inner surface of the junction box body 1, and an avoidance hole 9 is constructed on the sealing gasket 2 to pass through the sealing gasket 2. When the pressing piece 3 presses the sealing gasket 2 onto the junction box body 1 so that the sealing gasket 2 blocks the first hollow area 4, the boss 8 is inserted into the avoidance hole 9 and the boss 8 abuts the pressing piece 3.

[0037] In this embodiment, the sealing gasket 2 is a flexible structure. If the sealing gasket 2 is directly pressed against the junction box body 1 by the pressing member 3, that is, the pressing force is completely applied to the sealing gasket 2, then over time, the sealing gasket 2 is prone to creep and the sealing fails. In this application, a boss 8 is provided on the inner surface of the junction box body 1. When the pressing member 3 presses the sealing gasket 2 against the junction box body 1, the boss 8 passes through the avoidance hole 9 on the sealing gasket 2 and abuts the pressing member 3. Then, part of the pressing force applied by the pressing member 3 acts on the sealing gasket 2, and the other part acts on the boss 8. That is, the boss 8 shares part of the pressing force, which can avoid the pressing force being completely applied to the sealing gasket 2 and causing sealing failure due to creep loss. Among them, the sealing gasket 2 can be made of EPDM rubber or silicone rubber. The pressing member 3 can be a sheet metal stamping part, so that high structural strength can be achieved with a small thickness. The surface of the sheet metal stamping part can also be sprayed with plastic according to the insulation requirements to achieve the insulation level of the specific product. Of course, the pressing member 3 can also be made of insulating materials such as plastic or phenolic resin, as long as the thickness can ensure the structural rigidity of the whole when pressed.

[0038] See also Figures 2 to 4 As shown, there are multiple first hollow areas 4, and the first hollow areas 4 are spaced apart in sequence on the junction box body 1. A support bridge 10 is formed between two adjacent first hollow areas 4, and each support bridge 10 is provided with a boss 8. There are multiple wire holes 5, and the positions of the wire holes 5 correspond to the positions of the first hollow areas 4.

[0039] In this technical solution, by configuring multiple first hollow areas 4 and forming support bridges 10 between two adjacent first hollow areas 4, when the pressing member 3 presses the sealing gasket 2 against the junction box body 1 so that the sealing gasket 2 blocks all first hollow areas 4, each support bridge 10 also provides support for the sealing gasket 2, thereby making the state of the sealing gasket 2 when pressed against the junction box body 1 more stable, and helping the sealing gasket 2 better seal each first hollow area 4. Since each first hollow area 4 corresponds to a lead 6, when there are multiple first hollow areas 4, the wire passage holes 5 on the sealing gasket 2 should also be configured accordingly, and the positions of each wire passage hole 5 must also correspond to the positions of each first hollow area 4.

[0040] See also Figures 2 to 4 、 Figure 7As shown, the junction box body 1 is configured with a first threaded hole 11, the sealing gasket 2 is configured with an insertion hole 13 that passes through the sealing gasket 2, and the pressing member 3 is configured with a second threaded hole 12 that passes through the pressing member 3. A fastener 17 is threadedly connected to the second threaded hole 12, passes through the insertion hole 13, and is threaded into the first threaded hole 11, so that the pressing member 3 presses the sealing gasket 2 against the junction box body 1. By using the fastener 17 to fix the pressing member 3 and the sealing gasket 2 to the junction box body 1, the pressing member 3 presses the sealing gasket 2 to seal each first hollow area 4. The fastener 17 can be a bolt.

[0041] See also Figure 2 and Figure 3 As shown, bosses 8 are provided on both sides of the first threaded hole 11 , and avoidance holes 9 are provided on both sides of the insertion hole 13 . The two bosses 8 are respectively inserted into the two avoidance holes 9 , and the two bosses 8 both abut against the pressing member 3 .

[0042] In this embodiment, by providing protrusions 8 on both sides of the first threaded hole 11, when the fastener 17 secures the compression member 3 and the sealing gasket 2 to the junction box body 1 to achieve sealing of the first hollow areas 4 by the sealing gasket 2, the two protrusions 8 respectively abut the compression member 3, thereby more evenly applying force to the compression member 3. When the compression member 3 is more evenly applied, the sealing gasket 2 also receives more even pressure from the compression member 3.

[0043] See also Figure 4 and Figure 5 As shown, the insertion hole 13 is connected to the avoidance hole 9. When the fastener 17 fixes the compression member 3 and the sealing gasket 2 to the junction box body 1, the insertion hole 13 is connected to the avoidance hole 9, so that the boss 8 and the fastener 17 are relatively close to each other. The boss 8 can then provide close support to the compression member 3 relative to the fastener 17. Since the support area of ​​the boss 8 is limited, this close support can ensure the rigid support effect of the boss 8 on the compression member 3.

[0044] See also Figure 1 and Figure 3 As shown, a recessed area 14 is formed on the sealing gasket 2, the wire hole 5 is constructed in the recessed area 14, and a second hollow area 15 is formed on the pressing member 3. When the pressing member 3 presses the sealing gasket 2 against the junction box body 1 so that the sealing gasket 2 blocks the first hollow area 4, the positions of the first hollow area 4 and the second hollow area 15 correspond to the position of the recessed area 14.

[0045] In this technical solution, by forming a second hollow area 15 on the pressing member 3, and when the pressing member 3 presses the sealing gasket 2 against the junction box body 1 so that the sealing gasket 2 blocks the first hollow area 4, the positions of the first hollow area 4 and the second hollow area 15 correspond to the positions of the recessed area 14, indicating that the pressing member 3 only presses a part of the sealing gasket 2, that is, the sealing gasket 2 is only partially compressed, not as a whole, which makes the sealing gasket 2 less likely to creep and fail to seal. In order to make the pressing effect of the pressing member 3 on the sealing gasket 2 better, the part of the sealing gasket 2 outside the recessed area 14 can be appropriately expanded. It can be understood that when the number of the first hollow areas 4 is multiple, the number of the recessed areas 14 on the sealing gasket 2 and the number of the second hollow areas 15 on the pressing member 3 are also the same.

[0046] See also Figure 4 As shown, the sealing gasket 2 has a protrusion 16 , the wire hole 5 passes through the protrusion 16 , and the protrusion 16 passes through the second hollow area 15 .

[0047] In this embodiment, by providing the protrusion 16 on the sealing gasket 2 and allowing the wire hole 5 to pass through the protrusion 16 , the operation of sealing between the lead wire 6 and the hole wall of the wire hole 5 is more convenient.

[0048] The present invention also provides a motor, including the aforementioned junction box. It should also be noted that the motor of the present application has three leads 6, so there are also three first hollow areas 4 on the junction box body 1, three recessed areas 14 on the sealing gasket 2, and three second hollow areas 15 on the clamping member 3. When the number of the first hollow areas 4 is three, two support bridges 10 will be formed on the junction box body 1. Each support bridge 10 is constructed with two first threaded holes 11. Since bosses 8 are provided on both sides of each first threaded hole 11, eight bosses 8 are ultimately provided on the junction box body 1. The present application ultimately has four fasteners to fix the clamping member 3 and the sealing gasket 2 to the junction box body 1.

[0049] The present invention also provides a vehicle, comprising the aforementioned motor. Finally, it should be noted that the vehicle in the present application particularly refers to a new energy vehicle.

[0050] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are only preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and variations can be made without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A junction box, characterized in that: The invention comprises a junction box body (1) and a sealing gasket (2) and a pressing member (3) arranged in the junction box body (1); a first hollow area (4) is formed on the junction box body (1); the pressing member (3) is used to press the sealing gasket (2) onto the junction box body (1) so that the sealing gasket (2) blocks the first hollow area (4); a wire hole (5) is constructed on the sealing gasket (2); a lead wire (6) passes through the first hollow area (4) and the wire hole (5) in sequence and enters the interior of the junction box body (1); the lead wire (6) is sealedly connected to the hole wall of the wire hole (5); and one end of the lead wire (6) located in the junction box body (1) is connected to a terminal (7).

2. The junction box according to claim 1, wherein: A boss (8) is provided on the inner surface of the junction box body (1), and a relief hole (9) penetrating the sealing gasket (2) is constructed on the sealing gasket (2). When the pressing member (3) presses the sealing gasket (2) onto the junction box body (1) so that the sealing gasket (2) blocks the first hollow area (4), the boss (8) is inserted into the relief hole (9), and the boss (8) abuts against the pressing member (3).

3. The junction box according to claim 2, characterized in that: There are a plurality of first hollow areas (4), and each of the first hollow areas (4) is sequentially spaced apart on the junction box body (1). A support bridge (10) is formed between two adjacent first hollow areas (4), and each of the support bridges (10) is provided with the protruding column (8). There are a plurality of wire holes (5), and the position of each of the wire holes (5) corresponds to the position of each of the first hollow areas (4).

4. The junction box according to claim 2, characterized in that: The junction box body (1) is provided with a first threaded hole (11), the sealing gasket (2) is provided with an insertion hole (13) penetrating the sealing gasket (2), the pressing member (3) is provided with a second threaded hole (12) penetrating the pressing member (3), and a fastener (17) is threadedly connected to the second threaded hole (12), penetrating the insertion hole (13), and threadedly connected to the first threaded hole (11) so that the pressing member (3) presses the sealing gasket (2) onto the junction box body (1).

5. The junction box according to claim 4, characterized in that: The protruding columns (8) are provided on both sides of the first threaded hole (11), and the avoiding holes (9) are provided on both sides of the insertion hole (13). The two protruding columns (8) are respectively inserted into the two avoiding holes (9), and the two protruding columns (8) are both in contact with the pressing member (3).

6. The junction box according to claim 4, characterized in that: The insertion hole (13) is communicated with the avoidance hole (9).

7. The junction box according to claim 1, characterized in that: A recessed area (14) is formed on the sealing gasket (2), the wire hole (5) is constructed in the recessed area (14), and a second hollowed area (15) is formed on the pressing member (3). When the pressing member (3) presses the sealing gasket (2) onto the junction box body (1) so that the sealing gasket (2) blocks the first hollowed area (4), the positions of the first hollowed area (4) and the second hollowed area (15) both correspond to the position of the recessed area (14).

8. The junction box according to claim 7, characterized in that: The sealing gasket (2) has a raised portion (16), the wire hole (5) passes through the raised portion (16), and the raised portion (16) passes through the second hollow area (15).

9. A motor, characterized in that: The junction box comprises the junction box according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Including the motor according to claim 9.

Images