Sealing structure for wire outlet of motor cavity and new energy motor

Abstract

The utility model discloses a sealing structure for a motor cavity wire outlet and a new energy motor. The sealing structure comprises a wiring board and a conductive terminal. The wiring board is used for being fixed at a wire outlet of a motor cavity, a wire outlet via hole is formed in the wiring board, the first end of the conductive terminal is used for being fixedly connected with a leading-out wire of a motor stator in the motor cavity, and the second end of the conductive terminal penetrates out of the wire outlet via hole and is used for being fixedly connected with a connecting wire or a wiring terminal located in a junction box cavity. A flange extends from the outer circumference of the wire outlet via hole to one side far away from the motor cavity, and a sealing member is arranged between the conductive terminal and the flange. The sealing structure can realize airtight level isolation between the motor cavity and the junction box cavity, so that hot air in the motor cavity cannot enter the junction box cavity, condensate water can be effectively prevented from being generated, and the insulativity and reliability of the motor are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor wiring structures, and particularly relates to a sealing structure for a motor cavity wire outlet and a new energy motor. Background Art

[0002] Due to factors such as cold weather or humid air in winter, the high-voltage junction box cavity of the motor on the vehicle is not insulated from the motor cavity, and a large amount of heat will be generated when the motor is running, making the temperature inside the motor cavity relatively high. The hot air in the motor cavity will enter the junction box cavity, and the outer wall of the high-voltage junction box cavity of the motor is thin, and the temperature cools down relatively quickly; when the motor stops running, condensation water is easily generated in the high-voltage junction box cavity, and the condensation water contacts the exposed motor terminals, resulting in reduced insulation performance of the motor, affecting the normal driving of the vehicle. Utility Model Content

[0003] In view of the above problems, the utility model discloses a sealing structure for a wire outlet of a motor cavity and a new energy motor, so as to overcome the above problems or at least partially solve the above problems.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a sealing structure for a motor cavity outlet, comprising a wiring board and a conductive terminal;

[0006] The terminal block is used to be fixed at the wire outlet of the motor cavity. A wire outlet through hole is opened on the terminal block. The first end of the conductive terminal is used to be fixedly connected to the lead wire of the motor stator in the motor cavity. The second end of the conductive terminal passes through the wire outlet through hole and is used to be fixedly connected to the connecting wire or the terminal located in the junction box cavity. The outer circumference of the wire outlet through hole extends with a flange toward a side away from the motor cavity, and a sealing member is provided between the conductive terminal and the flange.

[0007] Furthermore, a connecting hole is provided at the first end of the conductive terminal, and the conductive terminal is welded and fixed to the lead wire through the connecting hole. A screw hole is provided at the second end of the conductive terminal, and the conductive terminal is fixedly connected to the connecting wire or the connecting terminal through the screw hole and the bolt / screw.

[0008] Furthermore, an insulating barrier is axially extended on one side of the flange away from the motor cavity, and the insulating barrier is located on one side of the flange in the radial direction. The second end of the conductive terminal is located higher than the flange and lower than the insulating barrier.

[0009] Furthermore, a pair or two pairs of symmetrically arranged notches are formed on the outer circumference of the second end of the conductive terminal.

[0010] Furthermore, a limiting protrusion that cooperates with the missing corner is formed on the inner side wall of the flange away from the motor cavity.

[0011] Furthermore, a trumpet-shaped guiding inclined surface is provided on one side of the outlet wire through hole close to the motor cavity.

[0012] Furthermore, the sealing member is a sealing ring, a first sealing groove is provided on the outer circumference of the conductive terminal, and the sealing ring is located in the first sealing groove.

[0013] Furthermore, a second sealing groove is provided on the terminal block, a sealing ring is provided in the second sealing groove, and the sealing ring is used for sealing between the terminal block and the wire outlet of the motor cavity.

[0014] Furthermore, the wiring board is provided with a fixing hole, and the wiring board is fixed to the wire outlet of the motor cavity through the fixing hole and bolts / screws.

[0015] On the other hand, the utility model discloses a new energy motor, on which the new energy motor is provided with the sealing structure for the wire outlet of the motor cavity as described above.

[0016] The advantages and beneficial effects of the utility model are:

[0017] The sealing structure of the utility model can achieve airtight isolation between the motor cavity and the junction box cavity. The inflation pressure in the motor cavity is 20kPa. When tested for 20s, the air pressure leakage is no more than 40Pa, so that the hot air in the motor cavity cannot enter the interior of the junction box cavity, which can effectively prevent the generation of condensed water and improve the insulation and reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 An exploded structural diagram of a sealing structure in one embodiment of the utility model;

[0020] Figure 2 A front view of a sealing structure in one embodiment of the utility model;

[0021] Figure 3 A three-dimensional structural diagram of a wiring board from above in one embodiment of the utility model;

[0022] Figure 4A three-dimensional structural diagram of a wiring board from the bottom perspective in one embodiment of the utility model;

[0023] Figure 5 A front view of a wiring board in one embodiment of the utility model;

[0024] Figure 6 It is a three-dimensional structural diagram of a conductive end in one embodiment of the utility model;

[0025] Figure 7 This is an assembly structure diagram of a sealing structure in one embodiment of the utility model;

[0026] Figure 8 for Figure 7 The enlarged view of point A in the middle;

[0027] Fig. 9 for Figure 7 Enlarged view of point B in the middle.

[0028] In the figure: 1. terminal block; 2. conductive terminal; 3. motor cavity; 4. junction box cavity; 5. lead-out hole; 6. lead-out wire; 7. terminal; 8. flange; 9. seal; 10. screw hole; 11. bolt; 12. insulating barrier; 13. notched corner; 14. guide slope; 15. first sealing groove; 16. second sealing groove; 17. sealing ring; 18. fixing hole; 19. reinforcing rib. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In one embodiment of the present invention, a sealing structure for a motor cavity outlet is provided, such as Figures 1 to 9 As shown, the sealing structure includes a wiring board 1 and a conductive terminal 2; wherein the wiring board is made of an insulating material, and the conductive terminal is made of a conductive material, and the material of the conductive terminal is preferably copper.

[0032] Specifically, the terminal block 1 is used to be fixed at the outlet of the motor cavity 3, so that the motor cavity 3 and the junction box cavity 4 are separated, so that the hot air in the motor cavity 3 cannot enter the junction box cavity 4 through the outlet. The terminal block 1 is provided with an outlet hole 5. The first end ( Figure 6 The lower end of the conductive terminal 2 is used to be fixedly connected to the lead wire 6 of the motor stator in the motor cavity 3, and the second end of the conductive terminal 2 ( Figure 6 The upper end of the conductive terminal 2 is passed through the lead-out hole 5 for fixed connection with the connecting wire or the terminal 7 in the junction box cavity 4. The lead-out wire 6 of the motor stator is realized through the conductive terminal 2. A flange 8 is extended from the outer circumference of the lead-out hole 5 to the side away from the motor cavity 3. A sealing member 9 is provided between the conductive terminal 2 and the flange 8. The arrangement of the flange 8 can increase the sealing force-bearing surface of the sealing member 9, and the conductive terminal 2 and the sealing member 9 can be customized and matched, and the connection is tighter, so that the sealing effect between the conductive terminal 2 and the terminal block 1 is better and more stable, and an airtight seal is achieved.

[0033] When the sealing structure is assembled on the motor, the first end of the conductive terminal 2 is first fixedly connected to the lead wire 6 of the motor stator in the motor cavity 3, and a sealing member 9 is arranged on the conductive terminal 2. Then, the terminal block 1 is fixed at the wire outlet of the motor cavity 3, and the second end of the conductive terminal 2 is passed through the wire outlet hole 5. Finally, the second end of the conductive terminal 2 is fixedly connected to the connecting wire or the terminal 7.

[0034] In summary, the sealing structure of the utility model can achieve airtight isolation between the motor cavity and the junction box cavity. The inflation pressure in the motor cavity is 20kPa. When tested for 20s, the air pressure leakage is no more than 40Pa, so that the hot air in the motor cavity cannot enter the interior of the junction box cavity, which can effectively prevent the generation of condensed water and improve the insulation and reliability of the motor.

[0035] In this embodiment, a connection hole is provided at the first end of the conductive terminal, and the conductive terminal is fixed to the lead wire by welding through the connection hole, that is, the lead wire extends into the connection hole and is connected to the conductive terminal by resistance welding and crimping, so that the connection is more secure; Figure 6 and Figure 8 As shown, a screw hole 10 is provided at the second end of the conductive terminal 2, and the conductive terminal 2 is fixedly connected to the connecting wire or the wiring terminal 7 through the screw hole 10 and the bolt 11 / screw, making assembly and disassembly more convenient and quick.

[0036] And, if Figures 2 to 5 and Figure 8 As shown, the flange 8 is away from the side of the motor cavity 3 ( Figure 5An insulating barrier 12 is axially extended on the upper side of the flange 8, that is, on the side of the flange 8 close to the side wall of the junction box cavity 4. The second end of the conductive terminal 2 is located higher than the flange 8 and lower than the insulating barrier 12. The setting of the insulating barrier 12, on the one hand, makes the insulating barrier 12 located between the conductive terminal 2 and the side wall of the junction box cavity 4, which can achieve electrical insulation between the conductive terminal 2 and the side wall of the junction box cavity 4, so that the distance between the conductive terminal 2 and the side wall of the junction box cavity 4 can be set very close, thereby making the structure more compact, and on the other hand, does not affect the assembly and fixation of the conductive terminal 2 and the connecting wire or the terminal 7.

[0037] In addition, if Figure 6 As shown, a pair or two pairs of symmetrically arranged corner cutouts 13 are formed on the outer circumference of the second end of the conductive terminal 2, and the corner cutouts 13 are used to resist torsion. At the same time, when the connecting wire or the terminal 7 is fixed to the second end of the conductive terminal 2 by means of the screw / bolt 11, the corner cutouts 13 on the second end of the conductive terminal 2 can be clamped by means of pliers or a wrench to prevent the conductive terminal 2 from rotating when the screw / bolt 11 is screwed into the screw hole 10.

[0038] In addition, a limiting protrusion that cooperates with the missing corner is formed on the inner side wall of the flange away from the motor cavity. When the conductive terminal is inserted into the flange, the limiting protrusion is exactly located at the missing corner. The limiting cooperation between the limiting protrusion and the missing corner can prevent the conductive terminal from rotating relative to the wiring board, thereby preventing the airtightness between the conductive terminal and the wiring board from deteriorating. Of course, the limiting protrusion can also be replaced by an assembly tool.

[0039] In this embodiment, if Figure 4 As shown, a trumpet-shaped guiding slope 14 is provided on one side of the outlet hole 5 close to the motor cavity 3. Through the guiding effect of the guiding slope 14, the second end of the conductive terminal 2 can be more easily inserted into the outlet hole 5, thereby facilitating assembly.

[0040] Furthermore, the sealing member 9 is a sealing ring, and the number of the sealing rings can be one or more. When there are multiple sealing rings, each sealing ring is spaced apart, such as Figure 6 and Figure 8 As shown, a first sealing groove 15 is provided on the outer circumference of the conductive terminal 2, and the sealing ring is located in the first sealing groove 15, so that the sealing ring can be limited to prevent the sealing ring from wandering. Of course, in other embodiments, the sealing member can also be a sealant.

[0041] Furthermore, if Figure 3 , Figure 7 and Fig. 9As shown, the terminal block 1 is provided with a second sealing groove 16, and a sealing ring 17 is provided in the second sealing groove 16. The sealing ring 17 is used to seal between the terminal block 1 and the outlet of the motor cavity 3, thereby ensuring the airtightness of the motor structure. In other embodiments, the terminal block and the outlet of the motor cavity can also be sealed by a sealant.

[0042] In this embodiment, if Figures 1 to 5 As shown, the terminal block 1 is provided with three outlet holes 5 arranged in a line, and the sealing structure includes three conductive terminals 2, which are respectively connected to the three-phase lead wires 6 of the three-phase motor, and a preset distance is provided between two adjacent outlet holes 5. The preset distance is determined according to the environment in which the motor is used, and the purpose of setting the preset distance is to ensure the electrical insulation of the motor outlet structure.

[0043] In addition, if Figure 2 and Figure 3 As shown, the terminal block 1 is provided with a fixing hole 18, and the terminal block 1 is fixed to the outlet of the motor cavity 3 through the fixing hole 18 and bolts / screws; and the outlet of the motor cavity 3 can be provided with a stepped groove, and the terminal block 1 is assembled in the stepped groove, thereby enhancing the sealing during assembly. In addition, the terminal block 1 is provided with a reinforcing rib 19 for improving the structural strength of the terminal block 1.

[0044] Another embodiment of the utility model provides a new energy motor, on which the sealing structure for the motor cavity outlet in the above embodiment is provided. The new energy motor has the advantages of good insulation and reliable performance.

[0045] The above description is only a specific implementation of the present invention. Under the above teaching of the present invention, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present invention, and the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A sealing structure for a motor cavity outlet, characterized in that: including a terminal block and conductive terminals; The terminal block is used to be fixed at the wire outlet of the motor cavity. A wire outlet through hole is provided on the terminal block. The first end of the conductive terminal is used to be fixedly connected to the lead wire of the motor stator in the motor cavity. The second end of the conductive terminal passes through the wire outlet through hole and is used to be fixedly connected to the connecting wire or the terminal located in the junction box cavity. A flange is extended from the outer circumference of the wire outlet through hole to the side away from the motor cavity, and a sealing member is provided between the conductive terminal and the flange.

2. The sealing structure for the motor cavity outlet according to claim 1, characterized in that: The first end of the conductive terminal is provided with a connecting hole, and the conductive terminal is welded and fixed to the lead wire through the connecting hole. The second end of the conductive terminal is provided with a screw hole, and the conductive terminal is fixedly connected to the connecting wire or the connecting terminal through the screw hole and the bolt / screw.

3. The sealing structure for the motor cavity outlet according to claim 2, characterized in that: An insulating barrier is axially extended from one side of the flange away from the motor cavity. The insulating barrier is located on one side of the flange in the radial direction. The second end of the conductive terminal is located higher than the flange and lower than the insulating barrier.

4. The sealing structure for the motor cavity outlet according to claim 3, characterized in that: A pair or two pairs of symmetrically arranged notches are formed on the outer circumference of the second end of the conductive terminal.

5. The sealing structure for the motor cavity outlet according to claim 4, characterized in that: A limiting protrusion that matches the missing corner is formed on the inner side wall of the flange away from the motor cavity.

6. The sealing structure for the motor cavity outlet according to claim 1, characterized in that: A trumpet-shaped guiding inclined surface is provided on one side of the outlet wire through hole close to the motor cavity.

7. The sealing structure for the motor cavity outlet according to claim 1, characterized in that: The sealing member is a sealing ring, a first sealing groove is provided on the outer circumference of the conductive terminal, and the sealing ring is located in the first sealing groove.

8. The sealing structure for the motor cavity outlet according to claim 1, characterized in that: The terminal block is provided with a second sealing groove, and a sealing ring is provided in the second sealing groove. The sealing ring is used for sealing between the terminal block and the wire outlet of the motor cavity.

9. The sealing structure for a motor cavity outlet according to any one of claims 1 to 8, characterized in that: The wiring board is provided with a fixing hole, and the wiring board is fixed to the wire outlet of the motor cavity through the fixing hole and bolts / screws.

10. A new energy motor, characterized in that: The new energy motor is provided with a sealing structure for a motor cavity wire outlet as described in any one of claims 1 to 9.

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