Wire holder, junction box and motor

Abstract

The utility model discloses a wiring seat, a wiring box and a motor. The wire holder is arranged between the motor and the junction box, and comprises a plastic package main body, a conductive part and a sealing assembly. According to the invention, the plastic package main body is provided with a first avoiding part and a second avoiding part. The conductive part is embedded in the plastic package body, and the two ends of the conductive part extend to the first avoiding part and the second avoiding part respectively. And the sealing assembly sleeves the periphery of the conductive part and is embedded in the plastic package main body, a plurality of concave parts and a plurality of convex parts are arranged on the sealing assembly, and the plurality of concave parts and the plurality of convex parts are alternately arranged along the extension direction of the conductive part. The junction box solves the problem that a junction box in the prior art is prone to condensation.

Description

Technical Field

[0001] The present application relates to the technical field of drive devices, and in particular to a terminal block, a terminal box and a motor. Background Art

[0002] The terminal block is usually set between the motor and the junction box. The terminal block is widely used in the motor industry as an electrical component that connects the motor winding output terminal to the power supply terminal. The quality of the terminal block directly affects the performance of the motor. What's worse, it may cause accidents such as creepage or short circuit that endanger personal safety. In the field of new energy motors, the requirements for terminal blocks are even more stringent.

[0003] At present, the molding method of the terminal block is mostly injection molding. Due to objective reasons such as uneven injection molding process levels and variable operating conditions, there is a small gap between the copper busbar and the injection molding body. When the motor is working normally, the internal gas is heated by the winding, causing the internal air pressure to increase, forming high-temperature and high-pressure gas, while the gas pressure in the cavity of the terminal box is low. Due to the pressure difference, the high-temperature and high-pressure gas penetrates into the cavity of the terminal box through the gap. When the high-temperature and high-pressure gas is cooled, condensation occurs, which increases the risk of insulation failure of the terminal block, thereby affecting the service life and safety performance of the motor. Utility Model Content

[0004] The main purpose of the present application is to provide a terminal block, a terminal box and a motor, so as to at least solve the problem that condensation is prone to occur in the terminal box in the prior art.

[0005] According to one aspect of the present application, a wiring socket is provided, comprising:

[0006] A plastic-sealed main body, wherein a first avoidance portion and a second avoidance portion are formed on the plastic-sealed main body;

[0007] A conductive part, wherein the conductive part is embedded in the plastic package body, and two ends of the conductive part extend to the first avoidance part and the second avoidance part respectively;

[0008] A sealing component is sleeved on the outer periphery of the conductive part and embedded in the plastic package body. The sealing component is provided with a plurality of recessed parts and a plurality of raised parts, and the plurality of recessed parts and the plurality of raised parts are alternately arranged along the extension direction of the conductive part.

[0009] Furthermore, the sealing assembly comprises:

[0010] The first sealing sleeve comprises n pieces, n∈N + ;

[0011] The second sealing sleeve includes m pieces, m∈N +, n first sealing sleeves and m second sealing sleeves are alternately connected in sequence to form a plurality of the protrusions and a plurality of the recesses, wherein n and m satisfy the relationship: n=m+1.

[0012] Further, the first sealing sleeve has an annular outer flange protruding from the second sealing sleeve, the annular outer flange forms the protruding portion, and the recessed portion is formed between two adjacent annular outer flanges and the second sealing sleeve.

[0013] Furthermore, a width L1 of the annular outer flange protruding from the second sealing sleeve satisfies the relationship: 1mm≤L1≤2mm.

[0014] Furthermore, the adjacent first sealing sleeves and the second sealing sleeves are connected via a sealant layer.

[0015] Furthermore, along the extension direction of the conductive portion, the distance Ω1 between two adjacent first sealing sleeves satisfies the relationship: 0.5 mm ≤ Ω1 ≤ 3 mm; and / or,

[0016] Along the extending direction of the conductive portion, the interval Ω2 between two adjacent second sealing sleeves satisfies the relationship: 0.5mm≤Ω2≤3mm.

[0017] Furthermore, the plastic-encapsulated body includes a first section and a second section, the first section and the second section are connected to form a first L-shaped structure, the first avoidance portion is arranged on the first section, and the second avoidance portion is arranged on the second section;

[0018] The conductive portion includes a first straight section and a second straight section connected to each other, the first straight section and the second straight section are connected to form a second L-shaped structure, the first straight section is embedded in the first section, and one end of the first straight section away from the second straight section extends to the first avoidance portion, and the second straight section is embedded in the second section, and one end of the second straight section away from the first straight section extends to the second avoidance portion.

[0019] Furthermore, the sealing assembly includes at least two groups, at least one group of the sealing assembly is sleeved on the outer circumference of the first straight section, and at least one group of the sealing assembly is sleeved on the outer circumference of the second straight section.

[0020] Further, the first avoidance portion includes a first avoidance groove, the first avoidance groove is opened at the end of the first straight section away from the second straight section, and a first conductive member is embedded in the first avoidance groove, and the first conductive member is connected to the first straight section;

[0021] The second avoidance portion includes a second avoidance groove, which is opened at the end of the second straight section away from the first straight section, and a second conductive member is embedded in the second avoidance groove, and the second conductive member is connected to the second straight section.

[0022] Further, the conductive part and the sealing assembly are integrally formed; or,

[0023] The conductive part and the sealing component are arranged separately.

[0024] On the other hand, the present application also provides a junction box, which includes the above-mentioned junction socket.

[0025] On the other hand, the present application also provides a motor having the above-mentioned junction box.

[0026] Compared with the prior art, in the present application, a sealing assembly is sleeved on the outer periphery of the conductive part, and a plurality of recessed parts and raised parts alternately arranged along the extension direction of the conductive part are arranged on the sealing assembly. This means that the flow gap between the conductive part and the plastic-encapsulated main body forms a concave-convex gap under the setting of the sealing assembly. When the hot air in the motor flows into the concave-convex gap, the hot air hits the corners of the recessed part and the raised part to generate a vortex. Due to the vortex effect, the kinetic energy of the hot air is converted into thermal energy. At the same time, the thermal energy of the hot air is continuously dissipated under the action of the plastic-encapsulated main body, the sealing assembly and the conductive part. Finally, when the air in the flow gap between the conductive part and the plastic-encapsulated main body enters the junction box, the pressure and temperature of the air are almost the same as those of the air in the junction box, thereby avoiding the condensation phenomenon in the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of the wiring socket disclosed in this application;

[0029] Figure 2 A cross-sectional view of the wiring socket disclosed in the present application;

[0030] Figure 3 This is a schematic diagram of the explosion structure of the sealing assembly disclosed in this application;

[0031] Figure 4 This is a schematic diagram of the principle of air dissipation in the wiring socket disclosed in this application.

[0032] The above drawings include the following reference numerals:

[0033] 10. Plastic-sealed body; 11. First section; 12. Second section; 13. First avoidance portion; 14. Second avoidance portion; 20. Conductive portion; 21. First straight section; 22. Second straight section; 30. Sealing assembly; 31. First sealing sleeve; 32. Second sealing sleeve; 40. Current gap; 41. Protruding gap; 42. Concave gap; 131. First avoidance groove; 132. First conductive member; 141. Second avoidance groove; 142. Second conductive member; 301. Protruding portion; 302. Concave portion; 311. External flange. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] See also Figure 1 to Figure 2 As shown, according to an embodiment of the present application, a terminal block, a terminal box and a motor are provided. The terminal block is arranged between the motor and the terminal box, wherein the terminal block includes a plastic package body 10, a conductive part 20 and a sealing assembly 30.

[0038] In this embodiment, the plastic package body 10 is provided with a first avoidance portion 13 and a second avoidance portion 14. The conductive portion 20 is embedded in the plastic package body 10, and both ends of the conductive portion 20 extend to the first avoidance portion 13 and the second avoidance portion 14 respectively. The sealing component 30 is sleeved on the outer periphery of the conductive portion 20 and embedded in the plastic package body 10. The sealing component 30 is provided with a plurality of recessed portions 302 and a plurality of raised portions 301, and the plurality of recessed portions 302 and the plurality of raised portions 301 are alternately arranged along the extension direction of the conductive portion 20.

[0039] Specifically, when the plastic encapsulation body 10 and the conductive part 20 are injection molded, there may be certain errors in the injection molding process, resulting in a small current gap 40 between the plastic encapsulation body 10 and the conductive part 20. In addition, when the current passes through the conductive part 20, the conductive part 20 is heated, resulting in a current gap 40 between the conductive part 20 and the plastic encapsulation body 10. The first avoidance portion 13 and the second avoidance portion 14 on the terminal block are respectively used to connect the motor to the external power supply. When the motor is started, the air temperature in the motor is heated, while the air temperature in the junction box is relatively low. The air in the motor enters the junction box along the current gap 40 between the conductive part 20 and the plastic encapsulation body 10, and then the air cools, resulting in condensation in the junction box, which makes the insulation of the terminal block fail, increasing the risk of motor damage.

[0040] In order to solve the above problems, in this embodiment, a sealing assembly 30 is sleeved on the outer periphery of the conductive part 20, and a plurality of recessed parts 302 and raised parts 301 are arranged alternately along the extension direction of the conductive part 20 on the sealing assembly 30. This means that the flow gap 40 between the conductive part 20 and the plastic-encapsulated main body 10 forms a concave-convex gap under the setting of the sealing assembly 30. When the hot air in the motor flows into the concave-convex gap, the hot air hits the corners of the recessed part 302 and the raised part 301 to generate a vortex. Due to the vortex effect, the kinetic energy of the hot air is converted into thermal energy. At the same time, the thermal energy of the hot air is continuously dissipated under the action of the plastic-encapsulated main body 10, the sealing assembly 30 and the conductive part 20. Finally, when the air in the flow gap 40 between the conductive part 20 and the plastic-encapsulated main body 10 enters the junction box, the pressure and temperature of the air are almost the same as those of the air in the junction box, thereby avoiding the condensation phenomenon in the junction box.

[0041] It is worth mentioning that the width S of the flow gap 40 between the conductive part 20 and the plastic package body 10 theoretically satisfies the relationship: S = S1 + S2, where S1 represents the width of the flow gap 40 caused by the temperature change of the conductive part 20, and S2 represents the width of the flow gap 40 caused by the error in the injection molding process. Specifically, S1 = 0.5*Ld*(a1-a2)*δT, where Ld represents the length of the long side of the conductive part 20, that is, if the conductive part 20 has a corner, Ld is the length of the longer section of the conductive part 20, a1 and a2 are the thermal expansion coefficients of the plastic package body 10 and the conductive part 20, respectively, and δT is the temperature difference between when the motor is working and when the motor is not working. Generally speaking, the width S2 of the flow gap 40 caused by the injection molding process is relatively small, while the width S1 of the flow gap 40 caused by thermal expansion is relatively large.

[0042] Furthermore, the conductive part 20 is integrally formed with the sealing component 30. Specifically, in this embodiment, the conductive part 20 is a copper busbar, and the sealing component 30 is a concave-convex section integrally formed on the copper busbar. The above structure ensures that there is no gap between the conductive part 20 and the sealing component 30, and hot air will not pass through between the conductive part 20 and the sealing component 30 and enter the junction box to cause condensation.

[0043] Of course, in some embodiments, the conductive part 20 and the sealing component 30 can also be separately provided. It is only necessary to sleeve the sealing component 30 on the outer periphery of the conductive part 20 before plastic sealing the conductive part 20, and apply sealant between the sealing component 30 and the conductive part 20 so that there is no gap between the sealing component 30 and the conductive part 20.

[0044] As attached Figure 3 As shown, the sealing assembly 30 includes a first sealing sleeve 31 and a second sealing sleeve 32. The first sealing sleeve 31 includes n pieces, n∈N + The second sealing sleeve 32 includes m pieces, m∈N + , n first sealing sleeves 31 and m second sealing sleeves 32 are alternately connected in sequence to form a plurality of protrusions 301 and a plurality of recesses 302 , wherein n and m satisfy the relationship: n=m+1.

[0045] In some embodiments, n first sealing sleeves 31 and m second sealing sleeves 32 are arranged in sequence and connected by sealant, so that a plurality of protrusions 301 and a plurality of recesses 302 are formed between the n first sealing sleeves 31 and the m second sealing sleeves 32. When the hot air passes through the protrusions 301 and the recesses 302, the heat energy and kinetic energy of the hot air are dissipated. In other embodiments, the first sealing sleeve 31 is a plurality of spaced convex sections on the copper bar, and the second sealing sleeve 32 is a plurality of spaced recesses on the copper bar. In addition, in this embodiment, the number of the second sealing sleeves 32 is one more than the number of the first sealing sleeves 31, so as to facilitate the setting of the protrusions 301 and the recesses 302. For example, when the protrusions 301 are arranged on the first sealing sleeve 31, and the recesses 302 are arranged on the second sealing sleeve 32, at this time, the two ends of the sealing assembly 30 are provided with protrusions 301, which can dissipate the hot air once at both the air inlet and the air outlet.

[0046] In addition, the first sealing sleeve 31 has an annular outer flange 311 protruding from the second sealing sleeve 32 . The annular outer flange 311 forms a protrusion 301 , and a recess 302 is formed between two adjacent annular outer flanges 311 and the second sealing sleeve 32 .

[0047] Specifically, as attached Figure 4 As shown, when there is a flow gap 40 between the conductive part 20 and the plastic package body 10, the flow gap 40 at the annular outer flange 311 is a convex gap 41. The flow gap 40 at the second sealing sleeve 32 is a concave gap 42. After the hot air enters the flow gap 40, the flowing hot air hits the side wall surface of the convex gap 41, so that the airflow changes its direction of movement at the collision point and generates a vortex together with other airflows, and the vortex dissipates the energy of the hot air. Subsequently, the hot air enters the concave gap 42, hits the side wall of the concave gap 42, and generates a vortex again. After the hot air is dissipated many times, the air that finally flows into the junction box has almost the same temperature and pressure as the air in the junction box, and will not cause condensation in the junction box.

[0048] Furthermore, the width L1 of the annular outer flange 311 protruding from the second sealing sleeve 32 satisfies the relationship: 1mm≤L1≤2mm. When L1 satisfies the above relationship, the raised gap 41 has a certain height. At this time, the vortex generated in the raised gap 41 will not enter the recessed gap before the vortex dissipates due to the small height of the raised gap 41. That is, when L1 is less than 1mm, the raised gap 41 is too short, and the vortex generated in the gap enters other areas of the gap before it dissipates, which may cause hot air to enter the junction box. When L1 is greater than 2mm, the width of the annular outer flange 311 is too large, resulting in a decrease in the overall strength of the plastic-sealed body 10. The value of L1 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm and 2mm. In addition, in order to ensure the overall structural strength of the terminal block, the value of L1 should not be greater than half of the minimum distance from the outer surface of the plastic package body 10 to the surface of the copper busbar. Preferably, the value of L1 is 1.5 mm.

[0049] Furthermore, the adjacent first sealing sleeves 31 and second sealing sleeves 32 are connected by a sealing glue layer (not shown in the figure). Specifically, when the sealing assembly 30 and the conductive part 20 are separately provided, and a plurality of first sealing sleeves 31 and a plurality of second sealing sleeves 32 are alternately connected in sequence, it is necessary to apply sealing glue between the adjacent first sealing sleeves 31 and second sealing sleeves 32 to prevent hot air from entering the junction box through the gap between the first sealing sleeves 31 and the second sealing sleeves 32.

[0050] Further, along the extension direction of the conductive part 20, the spacing Ω1 between two adjacent first sealing sleeves 31 satisfies the relationship: 0.5mm≤Ω1≤3mm. Specifically, when Ω1 satisfies the above relationship, the convex gap 41 and the concave gap 42 have a certain length, and the air can flow in the gap and dissipate energy. When Ω1 is less than 0.5mm, the length of the convex gap 41 and the concave gap 42 is too short, and the air in the gap may pass through the sealing component 30 and enter the junction box before too much energy dissipation, causing condensation in the junction box. When Ω1 is greater than 3mm, the overall length of the sealing component 30 is too long, which increases the manufacturing cost of the terminal block on the one hand, and may cause the volume of the terminal block to be too large on the other hand. Similarly, along the extension direction of the conductive part 20, the spacing Ω2 between two adjacent second sealing sleeves 32 satisfies the relationship: 0.5mm≤Ω2≤3mm. The values ​​of Ω1 and Ω2 can be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm and 3mm. Preferably, the values ​​of Ω1 and Ω2 are 2.5 mm.

[0051] As attached Figure 2As shown, the plastic package body 10 includes a first section 11 and a second section 12, the first section 11 and the second section 12 are connected to form a first L-shaped structure, the first avoidance portion 13 is arranged on the first section 11, and the second avoidance portion 14 is arranged on the second section 12. The conductive portion 20 includes a first straight section 21 and a second straight section 22 connected to each other, the first straight section 21 and the second straight section 22 are connected to form a second L-shaped structure, the first straight section 21 is embedded in the first section 11, and one end of the first straight section 21 away from the second straight section 22 extends to the first avoidance portion 13, the second straight section 22 is embedded in the second section 12, and one end of the second straight section 22 away from the first straight section 21 extends to the second avoidance portion 14.

[0052] In this embodiment, the L-shaped arrangement of the plastic package body 10 and the conductive part 20 can have a certain dissipation effect on the gas, that is, when the gas passes through the first straight section 21 along the flow gap 40, the gas will collide with the second section 12 of the plastic package body 10, thereby reducing the kinetic energy and thermal energy of the gas.

[0053] In order to further enhance the dissipation effect of the sealing assembly 30 on the hot air. In this embodiment, the sealing assembly 30 includes at least two groups, at least one group of sealing assemblies 30 is sleeved on the outer periphery of the first straight section 21, and at least one group of sealing assemblies 30 is sleeved on the outer periphery of the second straight section 22. Figure 1 As shown, in a specific embodiment, a set of sealing components 30 is sleeved on the outer periphery of the first straight section 21, and another set of sealing components 30 is sleeved on the outer periphery of the second straight section 22. By dissipating the hot air twice, the air temperature entering the junction box is prevented from being too high.

[0054] Furthermore, the first avoidance portion 13 includes a first avoidance groove 131, which is opened at the end of the first straight section 21 away from the second straight section 22, and a first conductive member 132 is embedded in the first avoidance groove 131, and the first conductive member 132 is connected to the first straight section 21. The second avoidance portion 14 includes a second avoidance groove 141, which is opened at the end of the second straight section 22 away from the first straight section 21, and a second conductive member 142 is embedded in the second avoidance groove 141, and the second conductive member 142 is connected to the second straight section 22.

[0055] Specifically, the first conductive member 132 is connected to the wiring of the junction box, and the second conductive member 142 is connected to the wiring of the motor. In the present embodiment, the first conductive member 132 and the second conductive member 142 are both metal inserts, the metal inserts are in contact with the conductive part 20, the wiring of the junction box is passed through the first avoidance groove 131 and is inserted into the metal insert, and the wiring of the junction box is locked in the metal insert by bolts. Similarly, the wiring of the motor passes through the second avoidance groove 141 and is locked in the metal insert by bolts. After the wiring of the junction box is connected to the circuit, the current is transferred from the first conductive member 132 to the conductive part 20, and then the conductive part 20 transfers the current to the second conductive member 142, and then the second conductive member 142 transfers the current to the wiring of the motor to power the motor.

[0056] In addition, in some embodiments, as shown in the attached Figure 1 As shown, the first avoidance grooves 131 include three, and the three first avoidance grooves 131 are arranged along the first direction (as shown in the attached Figure 1 The first and second avoidance grooves 141 are arranged at intervals along the first direction (in the Y direction), and the second avoidance grooves 141 include three, and the three second avoidance grooves 141 are arranged at intervals along the first direction. Conductive members are embedded in each avoidance groove, wherein the three first conductive members 132 in the three first avoidance grooves 131 are respectively used to connect to the three wirings of the three-phase power supply, and the three second conductive members 142 in the three second avoidance grooves 141 are respectively used to connect to the wirings of the three-phase motor.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A terminal block, characterized in that: include: A plastic-encapsulated main body (10), wherein a first avoidance portion (13) and a second avoidance portion (14) are provided on the plastic-encapsulated main body (10); A conductive part (20), the conductive part (20) being embedded in the plastic package body (10), and two ends of the conductive part (20) respectively extending to the first avoidance part (13) and the second avoidance part (14); A sealing component (30), the sealing component (30) being sleeved on the outer circumference of the conductive part (20) and embedded in the plastic package body (10), the sealing component (30) being provided with a plurality of recessed parts (302) and a plurality of raised parts (301), the plurality of recessed parts (302) and the plurality of raised parts (301) being alternately arranged along the extension direction of the conductive part (20).

2. The terminal block according to claim 1, characterized in that: The sealing assembly (30) comprises: A first sealing sleeve (31), wherein the first sealing sleeve (31) comprises n pieces, n∈N + ; A second sealing sleeve (32), wherein the second sealing sleeve (32) comprises m pieces, m∈N + , n first sealing sleeves (31) and m second sealing sleeves (32) are alternately connected in sequence to form a plurality of the protruding portions (301) and a plurality of the recessed portions (302), wherein n and m satisfy the relationship: n=m+1.

3. The terminal block according to claim 2, characterized in that: The first sealing sleeve (31) has an annular outer flange (311) protruding from the second sealing sleeve (32), the annular outer flange (311) forms the protruding portion (301), and the recessed portion (302) is formed between two adjacent annular outer flanges (311) and the second sealing sleeve (32).

4. The terminal block according to claim 3, characterized in that: The width L1 of the annular outer flange (311) protruding from the second sealing sleeve (32) satisfies the relationship: 1mm≤L1≤2mm.

5. The terminal block according to claim 2, characterized in that: The adjacent first sealing sleeves (31) and second sealing sleeves (32) are connected via a sealing rubber layer.

6. The terminal block according to claim 2, characterized in that: Along the extension direction of the conductive portion (20), the distance Ω1 between two adjacent first sealing sleeves (31) satisfies the relationship: 0.5 mm ≤ Ω1 ≤ 3 mm; and / or, Along the extension direction of the conductive portion (20), the distance Ω2 between two adjacent second sealing sleeves (32) satisfies the relationship: 0.5 mm ≤ Ω2 ≤ 3 mm.

7. The terminal block according to any one of claims 1 to 6, characterized in that: The plastic-sealed body (10) comprises a first section (11) and a second section (12), the first section (11) and the second section (12) are connected to form a first L-shaped structure, the first avoidance portion (13) is arranged on the first section (11), and the second avoidance portion (14) is arranged on the second section (12); The conductive portion (20) comprises a first straight section (21) and a second straight section (22) connected to each other, the first straight section (21) and the second straight section (22) being connected to form a second L-shaped structure, the first straight section (21) being embedded in the first section (11), and one end of the first straight section (21) away from the second straight section (22) extending to the first avoidance portion (13), and the second straight section (22) being embedded in the second section (12), and one end of the second straight section (22) away from the first straight section (21) extending to the second avoidance portion (14).

8. The terminal block according to claim 7, characterized in that: The sealing components (30) include at least two groups, at least one group of the sealing components (30) is sleeved on the outer periphery of the first straight section (21), and at least one group of the sealing components (30) is sleeved on the outer periphery of the second straight section (22).

9. The terminal block according to claim 7, characterized in that: The first avoidance portion (13) comprises a first avoidance groove (131), the first avoidance groove (131) being arranged at an end of the first straight section (21) away from the second straight section (22), and a first conductive member (132) being embedded in the first avoidance groove (131), and the first conductive member (132) being connected to the first straight section (21); The second avoidance portion (14) comprises a second avoidance groove (141), the second avoidance groove (141) being arranged at an end of the second straight section (22) away from the first straight section (21), and a second conductive member (142) being embedded in the second avoidance groove (141), the second conductive member (142) being connected to the second straight section (22).

10. The terminal block according to any one of claims 1 to 4, characterized in that: The conductive portion (20) and the sealing component (30) are integrally formed; or, The conductive part (20) and the sealing component (30) are arranged separately.

11. A junction box, characterized in that: The junction box comprises the junction holder according to any one of claims 1 to 10.

12. A motor, characterized in that: The electric motor includes the terminal box of claim 11.

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