New energy high-voltage large-current connector

Abstract

The utility model relates to the technical field of connectors, in particular to a new energy high-voltage large-current connector, which comprises a plastic main body, a binding post and a metal plate, the binding post penetrates through the plastic main body; the metal plate comprises a through hole formed in the middle, the metal plate further comprises a step part formed by extending towards the interior of the through hole, and the step part is provided with a sunken part or an inverted buckle penetrating through the step part; the plastic main body and the metal plate are integrally connected through injection molding, the step part is embedded in the plastic main body, and the inverted buckle is filled with the plastic main body; a plurality of fixing holes are formed in the periphery of the metal plate. According to the utility model, the shrinkage degree of the plastic main body can be reduced, the connection firmness and tightness between the plastic main body and the metal sheet can be improved, and the sealing effect of the manufactured connector can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a new energy high-voltage and high-current connector. Background Art

[0002] Connectors are used to connect two devices and transmit current or signals. In particular, high-voltage and high-current connectors used in new energy vehicles must not only meet basic functional requirements but also meet the requirements of good contact, reliable operation, and easy maintenance. Their reliability directly affects the normal operation of the circuit and involves the safety of the entire system. With the rapid development of new energy vehicles, higher requirements are also placed on the high-voltage and high-current connectors used in vehicles, such as waterproof and sealing performance.

[0003] See Figure 1 , is an old-style new energy high-voltage and high-current connector. The connector includes an injection-molded plastic body 100. A laterally protruding connecting platform 200 is formed in the middle of the plastic body 100. A fixing hole 300 is provided on the connecting platform 200. The connector is fixed to the corresponding carrier of the car through the fixing hole 300 and the bolt. This type of connector has certain shortcomings: First, after the connector is installed on the carrier, one end face of the connecting platform 200 serves as the sealing surface. However, since the position of the connecting platform 200 corresponding to the fixing hole 300 requires a thicker glue position, the injection-molded connecting platform 200 shrinks and deforms greatly, and the flatness of the sealing surface will differ greatly from the preset value, making it difficult to meet the waterproof and dustproof sealing requirements; second, the glue position around the fixing hole 300 is prone to locking and cracking, and there is a risk of failure under high vibration and high and low temperature aging scenarios of the car.

[0004] In order to solve the problems of the old new energy high-voltage and high-current connectors, the connecting platform of the new new energy high-voltage and high-current connector is made of metal material to avoid the above-mentioned problems such as deformation of the sealing surface and failure of locking. For details, please refer to the invention patent with publication number CN114883840A. However, the new new energy high-voltage and high-current connector still has certain shortcomings: the plastic body will shrink to a certain extent during cooling and molding, which will lead to a loose connection between the plastic body and the connecting platform, forming a gap between the two, affecting the sealing effect.

[0005] Therefore, it is necessary to provide a technical solution to solve the above problems. Utility Model Content

[0006] In existing new energy high-voltage and high-current connectors, the area where the outer periphery of the plastic body meets the connection platform is prone to shrinkage due to different material temperatures, resulting in a gap between the plastic body and the connection platform, affecting the sealing effect.

[0007] The utility model provides a new energy high-voltage and high-current connector, comprising a plastic body, a terminal and a metal plate; the terminal passes through the plastic body; the metal plate comprises a through hole provided in the middle, the metal plate further comprises a step portion extending into the through hole, the step portion is provided with a recess or an undercut passing through the step portion; the plastic body and the metal plate are integrally injection-molded, the step portion is embedded in the plastic body, and the plastic body fills the undercut; a plurality of fixing holes are provided on the periphery of the metal plate.

[0008] More specifically, the undercut is connected to the through hole, and an interface is formed at the connection point between the two. The maximum diameter or maximum width of the undercut is greater than the width of the interface.

[0009] More specifically, the cross section of the undercut is circular, and a chamfer is provided at a connection between the side wall of the undercut and the side wall of the through hole.

[0010] More specifically, the undercut is opened on a portion of the metal plate outside the step portion.

[0011] More specifically, the plastic body is provided with a side hole corresponding to the terminal and passing through the plastic body, and the side hole is filled with a sealing colloid.

[0012] More specifically, a radial sealing ring is installed on the plastic body, and the radial sealing ring is arranged around the outside of the plastic body.

[0013] More specifically, an end face sealing ring is installed on the plastic body, and the end face sealing ring is in contact with the metal plate; the radial sealing ring and the end face sealing ring are distributed on both sides of the metal plate.

[0014] More specifically, at least two positioning posts are provided on the metal plate.

[0015] The technical effects of the new energy high-voltage and high-current connector involved in this utility model are:

[0016] The present application provides an undercut on the metal plate; during the injection molding process of the plastic body, the rubber can flow into the undercut, and when the plastic body is cooled and formed, the rubber in the undercut is formed first, and the part of the plastic body located in the undercut is firmly connected to the metal sheet. In this way, when the plastic body tends to shrink, the metal sheet will exert a strong pulling force on the plastic body, so that the shrinkage degree of the plastic body is greatly reduced, thereby improving the connection firmness and tightness between the plastic body and the metal sheet, and improving the sealing effect of the prepared connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an existing new energy high-voltage and high-current connector;

[0018] Figure 2 This is a structural diagram of a new energy high-voltage and high-current connector involved in the present utility model;

[0019] Figure 3 This is a structural schematic diagram of a new energy high-voltage and high-current connector from another perspective involved in the utility model;

[0020] Figure 4 This is a structural diagram of a metal plate in a new energy high-voltage and high-current connector involved in the present utility model;

[0021] Figure 5 for Figure 4 Enlarged schematic diagram of point A in the middle.

[0022] Markings in the figure:

[0023] 1. Plastic body; 2. Terminals; 3. Metal plate; 4. Radial sealing ring; 5. End sealing ring;

[0024] 11. Side hole;

[0025] 31. Through hole; 32. Step; 33. Undercut; 34. Fixing hole; 35. Positioning column. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0029] In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] In order to more clearly illustrate the technical solution of the present invention, a preferred embodiment is provided below. Figures 1 to 3 A new energy high-voltage and high-current connector includes a plastic body 1, a terminal 2 and a metal plate 3; the terminal 2 passes through the plastic body 1; the metal plate 3 includes a through hole 31 provided in the middle, and the metal plate 3 also includes a step portion 32 extending into the through hole 31, and the step portion 32 is provided with a recess or an undercut 33 passing through the step portion 32; the plastic body 1 and the metal plate 3 are integrally injection-molded, the step portion 32 is embedded in the plastic body 1, and the plastic body 1 is filled with the undercut 33; a plurality of fixing holes 34 are provided on the outer periphery of the metal plate 3.

[0031] The metal plate 3 of the present application is formed by die-casting, and the die-cast metal plate 3 has higher strength. When the bolts cooperate with the fixing holes 34 to fix the metal plate 3 on the car platform, the peripheral part of the fixing holes 34 is not easy to crack, so that the connector can be stably connected to the car platform; secondly, the die-cast metal plate 3 has higher flatness, and the degree of fit with the sealing component is higher, thereby improving the sealing effect.

[0032] In addition, the present application provides an undercut 33 on the metal plate 3; during the injection molding process of the plastic body 1, the rubber can flow into the undercut 33, and when the plastic body 1 is cooled and formed, the rubber in the undercut 33 is formed first, and the part of the plastic body 1 located in the undercut 33 is firmly connected to the metal sheet. In this way, when the plastic body 1 tends to shrink, the metal sheet will form a strong pulling force on the plastic body 1, so that the degree of shrinkage of the plastic body 1 is greatly reduced, thereby improving the connection firmness and tightness between the plastic body 1 and the metal sheet, and improving the sealing effect of the prepared connector.

[0033] In one embodiment, undercut 33 is connected to through-hole 31, forming an interface where the two meet. The maximum diameter or width of undercut 33 is greater than the width of the interface. This design minimizes the structure of undercut 33, thereby reducing the width of step 32. This reduces the difficulty of manufacturing step 32, reduces the consumables of metal plate 3, and ultimately reduces material costs.

[0034] Preferably, the cross-section of the undercut 33 is circular, and the connection between the sidewall of the undercut 33 and the sidewall of the through hole 31 is rounded. This design makes it easier to fill the undercut 33 with the plastic body 1 during injection molding, improving the connection strength between the plastic body 1 and the metal plate 3. This design also avoids stress concentration on the metal plate 3, thereby improving the yield rate and service life of the metal plate 3.

[0035] As another embodiment, the undercut 33 is provided on the portion of the metal plate 3 outside the stepped portion 32. This design maximizes the volume of the undercut 33, thereby increasing the portion of the plastic body 1 embedded in the undercut 33, thereby allowing the metal plate 3 to better tighten the plastic body 1 and reduce shrinkage of the plastic body 1.

[0036] In this embodiment, the plastic body 1 is provided with side holes 11 extending therethrough, corresponding to the terminal posts 2. These holes are filled with a sealant. It should be understood that when the plastic body 1 shrinks, a gap may easily form between the terminal posts 2. The secondary filling with the sealant improves the seal between the terminal posts 2 and the plastic body 1.

[0037] In this embodiment, a radial sealing ring 4 is mounted on the plastic body 1 and is disposed around the outside of the plastic body 1. The radial sealing ring 4 can improve the sealing effect when the connector is plugged into and mated with an external connector.

[0038] In this embodiment, an end face sealing ring 5 is mounted on the plastic body 1 and contacts the metal plate 3. The radial sealing ring 4 and the end face sealing ring 5 are located on both sides of the metal plate 3. The end face sealing ring 5 can improve the sealing effect between the connector and the vehicle carrier.

[0039] In this embodiment, at least two positioning posts 35 are provided on the metal plate 3. The positioning posts 35 are used to position the connector and the carrier, thereby reducing the difficulty of locking the metal plate 3 and the carrier.

[0040] The above description is only a preferred embodiment of the present invention, and its structure is not limited to the shapes listed above. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new energy high voltage and high current connector, characterized in that: include: Plastic body; The terminal extends through the plastic body; A metal plate, the metal plate including a through hole in the middle, the metal plate further including a stepped portion extending into the through hole, the stepped portion being provided with a recess or an undercut extending through the stepped portion; the plastic body being integrally injection-molded with the metal plate, the stepped portion being embedded in the plastic body, and the plastic body filling the undercut; A plurality of fixing holes are provided on the outer periphery of the metal plate.

2. A new energy high-voltage and high-current connector according to claim 1, characterized in that: The undercut is connected to the through hole, and an interface is formed at the connection point between the two. The maximum diameter or maximum width of the undercut is greater than the width of the interface.

3. The new energy high-voltage and high-current connector according to claim 2, characterized in that: The cross section of the undercut is circular, and a chamfer is provided at a connection between the side wall of the undercut and the side wall of the through hole.

4. The new energy high-voltage and high-current connector according to claim 1, characterized in that: The undercut is opened on a portion of the metal plate other than the step portion.

5. The new energy high-voltage and high-current connector according to claim 1, characterized in that: The plastic body is provided with a side hole corresponding to the terminal and passing through the plastic body, and the side hole is filled with a sealing colloid.

6. The new energy high-voltage and high-current connector according to claim 1, characterized in that: A radial sealing ring is installed on the plastic body and is arranged around the outside of the plastic body.

7. The new energy high-voltage and high-current connector according to claim 6, characterized in that: An end face sealing ring is installed on the plastic body, and the end face sealing ring is in contact with the metal plate; the radial sealing ring and the end face sealing ring are distributed on both sides of the metal plate.

8. The new energy high-voltage and high-current connector according to claim 1, characterized in that: At least two positioning columns are provided on the metal plate.

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