阅读说明：本技术 一种线缆连接器及包含该连接器的dc-dc转换器 (cable connector and DC-DC converter containing the same ) 是由 彭玉洋 张金路 张红彬 鲍英超 于 2019-10-14 设计创作，主要内容包括：本发明涉及一种电流连接器装置,特别涉及一种线缆连接器及包含该连接器的DC-DC转换器。它包括固定端子,固定端子具有贯穿固定端子的中心通孔,线缆的一端从中心通孔的一端进入中心通孔内,线缆的另一端位于固定端子的中心通孔外,固定端子的中心通孔内壁与线缆外壁之间设置有注塑体,所述注塑体与固定端子中心通孔内壁抵接且密封,注塑体与线缆外壁抵接且密封,线缆进入固定端子中心通孔的该一端从注塑体对应于中心通孔另一端的位置直接或间接电引出并形成电引出端。(The invention relates to a current connector device, in particular to a cable connector and a DC-DC converter comprising the same, wherein the fixed terminal is provided with a central through hole penetrating through the fixed terminal, the end of a cable enters the central through hole from the end of the central through hole, the other end of the cable is positioned outside the central through hole of the fixed terminal, an injection molding body is arranged between the inner wall of the central through hole of the fixed terminal and the outer wall of the cable, the injection molding body is abutted and sealed with the inner wall of the central through hole of the fixed terminal, the injection molding body is abutted and sealed with the outer wall of the cable, and the end of the cable entering the central through hole of the fixed terminal is directly or indirectly electrically led out from the position of the injection molding body corresponding to the other end of the central.)

The utility model provides a cable connector, including the fixed terminal, its characterized in that fixed terminal has the center through-hole that runs through the fixed terminal, and the end of cable gets into in the center through-hole from the end of center through-hole, and the other end of cable is located the center through-hole of fixed terminal outward, is provided with the injection molding between the center through-hole inner wall of fixed terminal and the cable outer wall, the injection molding is with fixed terminal center through-hole inner wall butt and sealed, the injection molding with cable outer wall butt and sealed, this end that the cable got into fixed terminal center through-hole is directly or indirectly drawn forth and is formed the electricity and draw forth the end from the position that the injection molding corresponds to center through-hole other .

2. The cable connector of claim 1, wherein the end of the cable entering the central through hole of the fixed terminal extends directly out of the injection mold for electrical exit.

3. The cable connector of claim 1, wherein the end of the cable entering the central through hole of the fixed terminal is electrically connected with the end of the conductive member in the central through hole of the fixed terminal, the other end of the conductive member extends to the outside of the injection molding body for electrical leading out, and the connection part of the conductive member and the cable is hermetically encapsulated by the injection molding body.

4. The cable connector according to claim 3, wherein the connecting end of the conductive member and the cable is formed with a bent portion, and the bent portion is hermetically encapsulated by the injection molded body.

5. The cable connector according to claim 1 or 2 or 3 or 4, wherein the inner wall of the fixed terminal is provided with an inner protrusion embedded in the injection molded body.

6. The cable connector of claim 5, wherein the internal protrusion includes two annular arrays of internal protrusions spaced axially apart degrees from the inner wall of the central through hole of the fixed terminal, each annular array of internal protrusions including a plurality of internal protrusion units spaced annularly apart.

7. The cable connector of claim 6, wherein the cross-sectional area of at least of the inner cam monomers is greater than the cross-sectional area of the root of the inner cam monomers.

8. The cable connector of claim 1, 2, 3 or 4, wherein the fixed terminal is formed with a stepped hole corresponding to end of the cable for electrical lead-out, the inner diameter of the stepped hole is larger than the diameter of the central through hole adjacent to the stepped hole and is coaxial with the central through hole, the injection molded body is formed with an outer convex ring matching with the inner diameter of the stepped hole, the outer convex ring forms a seal with the stepped surface of the stepped hole, the thickness of the outer convex ring on the injection molded body is smaller than the axial depth of the stepped hole so as to form an annular groove for arranging a seal ring between the injection molded body and the end surface of the fixed terminal, and the end end of the injection molded body corresponding to the electrical lead-out of the cable axially protrudes out of the end surface of the fixed terminal to form an.

9. The cable connector according to claim 1, 2, 3 or 4, wherein the central through hole of the fixed terminal is formed by a plurality of inner hole sections with different inner diameters, and adjacent inner hole sections are in step transition.

10. A DCDC converter including the cable connector of any of claims 1-9, the DCDC converter including a housing having an aperture therethrough for passage of an electrical terminal of the cable, the fixed terminal being fixed to the housing, the electrical terminal of the cable passing through the aperture into the housing for electrical connection with the internal terminal of the converter.

Technical Field

The invention relates to current connector devices, in particular to a cable connector and a DC-DC converter comprising the same.

Background

With the high-speed development of electric vehicle technology, the position of a DCDC converter in the field of new energy electric vehicles is particularly important, and with the increase of electric power consumption on pure electric vehicles, the DCDC converter is used as a power supply device of electric appliances of the whole vehicle, and the output current of the DCDC converter must be increased (the DCDC converter is a standard low-voltage output device), so that current connection devices which can bear large current and can be matched with an aluminum shell of a converter to make waterproof sealing are required.

The high-current connectors on the current market are roughly divided into two types, types are that a copper bar is used as a conductive carrier, threaded holes are formed in two sides of the copper bar, a plastic body made of injection-molded nylon is mostly arranged in the middle of the copper bar, the structure is collectively called as a positive electrode output terminal, the terminal is fixed with an aluminum shell through holes in the plastic body by screws, a silicon rubber gasket is usually used for waterproof sealing between the terminal and the aluminum shell, the copper bar on the side (in the aluminum shell) of the terminal is connected with the conductive copper bar in a screw compression mode, and the copper bar on the side is connected with a copper nose capable of bearing high current in a screw compression mode.

Another types of the wire harness is characterized in that structures made of the same material (mostly made of PVC) as the sheath of the wire harness are injected on the wire harness, the structures and the wire harness are called as 'throwing wires', the throwing wires and the aluminum shell are fixed by screws, between the structures is sealed in a waterproof mode by rubber gaskets or CR gaskets, and then the structures are fixed by screws, because the PVC materials are soft at normal temperature, when the wires are screwed and fixed, the structures deform greatly, presses stainless steel plates on the throwing wires, the uniform stress of the structures is guaranteed, the deformation and the damage are reduced, no matter the steel plates are added, when the structures are aged (cold and hot circulation), the screws loosen, and the waterproof sealing fails.

Disclosure of Invention

The invention aims to provide cable connectors which can bear higher large current, have good sealing performance and are convenient to mount and a DC-DC converter comprising the same, and solve the problems in the prior art.

The technical scheme includes that the cable connector comprises a fixed terminal, the fixed terminal is provided with a central through hole penetrating through the fixed terminal, the end of a cable enters the central through hole from the end of the central through hole, the other end of the cable is located outside the central through hole of the fixed terminal, an injection molding body is arranged between the inner wall of the central through hole of the fixed terminal and the outer wall of the cable, the injection molding body is abutted and sealed with the inner wall of the central through hole of the fixed terminal, the injection molding body is abutted and sealed with the outer wall of the cable, the end of the cable entering the central through hole of the fixed terminal is directly or indirectly electrically led out from the position of the injection molding body corresponding to the other end of the central through hole to form an electric leading-out end, and the electric leading-out end is arranged between the fixed terminal and the cable, so that a compact and reliable sealing effect can be formed between the cable and the fixed terminal, during installation, the cable connector and the installation part are fixed, the fixed between the fixed terminal and the installation part are hermetically connected, installation hole or installation thread and the fixed terminal is used for fixedly connected with the installation part, the fixed terminal is preferably made of a high-temperature-resistant glass fiber reinforced PA 3533, and PA 7, PA and PA are preferably a low-PA.

Preferably, the end of the cable entering the central through hole of the fixed terminal directly extends to the outside of the injection molding body to realize electric leading out so as to be suitable for occasions with smaller passing current, when the passing current is larger, the end of the cable entering the central through hole of the fixed terminal is preferably electrically connected with the end of the conductive piece in the central through hole of the fixed terminal, the other end of the conductive piece extends to the outside of the injection molding body to realize electric leading out, and the connecting part of the conductive piece and the cable is hermetically wrapped by the injection molding body.

Preferably, a bent portion is formed at a connection end of the conductive piece and the cable, and the bent portion is wrapped by the injection molding body in a sealing manner. Wherein, the axial fixity intensity of cable at the injection molding body can be strengthened in the setting of the portion of bending on the electrically conductive piece, prevents that the cable axial is not hard up and prevents to pull off.

Preferably, the inner wall of the fixed terminal is provided with an inner bulge, and the inner bulge is embedded into the injection molding body. When moulding plastics and taking place the shrink because of under the circumstances such as temperature reduction, the interior arch of embedding injection molding body can play to draw the radial shrink of dragging spacing effect in order to restrict the injection molding body to the injection molding body, guarantees the sealed contact between injection molding body and the fixed terminal center through-hole inner wall, guarantees sealed effect.

Preferably, the inner protrusions comprise two annular inner protrusion arrays, the two annular inner protrusion arrays are spaced sections of distance in the axial direction of the inner wall of the central through hole of the fixed terminal, each annular inner protrusion array comprises a plurality of inner protrusion single bodies distributed at intervals in an annular shape, the inner protrusion single bodies of the two annular inner protrusion annular arrays are staggered on an axial projection surface, so that an axial clearance channel generated by a gap possibly existing between the injection molding body and the inner wall of the central through hole is blocked between the injection molding body and the inner wall of the central through hole of the fixed terminal, the sealing effect is further improved by steps, the two annular inner protrusion arrays are arranged, the two axial positions of the fixed terminal can be guaranteed to be in uniform sealing contact with the injection molding body, and double sealing guarantee between the inner wall of the central through hole of the fixed terminal and the injection molding body is achieved.

Preferably, at least cross-sectional areas of the inner convex single bodies are larger than the cross-sectional area of the roots of the inner convex single bodies, the inner convex single bodies can be in a frustum structure, and uneven structures can be formed on the surfaces of the inner convex single bodies, so that the tensioning effect of the inner convex single bodies on the injection molding body is enhanced, and the inner convex single bodies are prevented from loosening from the injection molding body due to shrinkage deformation of the injection molding body.

Preferably, the fixed terminal is provided with a step hole corresponding to end for electrically leading out the cable, the inner diameter of the step hole is larger than the diameter of the central through hole close to the step hole of the central through hole and is coaxial with the central through hole, an outer convex ring matched with the inner diameter of the step hole is formed on the injection molding body, and the outer convex ring forms a seal with the step surface of the step hole, and the matching of the outer convex ring of the injection molding body and the step surface of the fixed terminal can further ensure the sealing effect between the injection molding body and the fixed terminal.

Preferably, the thickness of the outer convex ring on the injection molding body is smaller than the axial depth of the stepped hole, so that an annular groove for arranging a sealing ring is formed between the injection molding body and the end face of the fixed terminal, and the end of the injection molding body, which corresponds to the cable electric lead-out, axially protrudes out of the end face of the fixed terminal to form an assembling convex part, wherein the sealing ring is arranged in the annular groove to facilitate the sealing between the fixed terminal and the installation part, and the assembling convex part on the injection molding body facilitates the matching installation of the connector and the installation part and enhances the sealing effect.

Preferably, the central through hole of the fixed terminal is composed of a plurality of inner hole sections with different inner diameters, and the adjacent inner hole sections are in step transition. Wherein, the step between the adjacent inner hole section can play the axial spacing to the injection molding body to the axial position stability of restriction injection molding body, thereby guaranteed the leakproofness between fixed terminal, injection molding body, the cable three.

The DCDC converter comprising the cable connector comprises a shell, wherein the shell is provided with a through hole for the electric leading-out end of the cable to pass through, the fixed terminal and the shell are fixed, and the electric leading-out end of the cable penetrates through the through hole to enter the shell to be electrically connected with the internal terminal of the converter. The DCDC converter adopts the cable connector, so that the DCDC converter has the characteristics of good sealing performance, convenience in installation and the like.

Therefore, the invention has the characteristics of good sealing effect, convenient installation, simple structure and the like.

Drawings

FIG. 1 is a schematic view of types of structures of the cable connector of the present invention;

fig. 2 is a perspective view of kinds of fixed terminals;

fig. 3 is a perspective view of another angles of the fixed terminal;

fig. 4 is a sectional view of the fixed terminal;

FIG. 5 is a schematic representation of perspective structures of an injection molded body;

FIG. 6 is another schematic views of the cable connector of the present invention;

fig. 7 is a cross-sectional view of fig. 6.

Detailed Description

The technical solution of the present invention is further specifically described by way of example with reference to the accompanying drawings.