Universal cylinder-penetrating plastic shell plug-in for oil-cooled motor

Abstract

The invention relates to the technical field of automobile parts. The invention discloses a universal cylinder-penetrating plastic shell plug-in for an oil-cooled motor, and the plug-in comprises a plug-in body and a wire. The wire comprises a first wire part, a crimping terminal and a second wire part which are sequentially connected along the axial direction, and exposed parts of wire cores of the first wire part and the second wire part are connected through the crimping terminal; the plug-in body comprises a glue pouring part, a threading part and a wire outlet part which are sequentially connected in the axial direction; an axial through hole is formed in the threading part, and the through hole comprises a terminal hole and a wire hole which are sequentially connected in the axial direction; a limiting end surface for axially limiting the crimping terminal is arranged in the terminal hole; a partition structure is fixed to one end, in the axial direction, of the threading part, a partition structure is arranged between every two adjacent penetrating holes in all the penetrating holes, the partition structures are located on the glue pouring part, and the axial end of each partition structure does not exceed the axial end face of the plug-in body. The problem of oil leakage is avoided. The invention is suitable for cylinder penetration in the environment of the oil-cooled motor. And short circuit is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, in particular to a cylinder-penetrating plastic shell plug-in unit. Background Art

[0002] Oil-cooled motors for new energy vehicles (NEVs) utilize oil as a cooling medium for efficient motor thermal management. This technology addresses the heat generated by high-power-density motors during operation, thereby improving motor performance, reliability, and lifespan. Oil-cooled motors are a key technological path for NEVs to achieve high power density, long range, and high reliability. With advances in materials science and thermal management technologies, oil-cooling solutions are expected to further optimize cost and performance, becoming a standard feature of next-generation electric drive systems. Higher performance comes with higher technical requirements. Plastic connectors embedded in the motors must not only offer reliable oil resistance but also excellent sealing properties. They must also maintain mechanical stability while operating continuously in high-temperature environments. This extends the lifespan of NEVs and reduces installation requirements.

[0003] The wire threading hole of the existing through-cylinder plastic shell plug-in passes through two electrically connected wires. One end of the wire in the oil-cooled motor will cause oil to climb along the wire core to the other end of the wire in the through-cylinder plastic shell plug-in, thereby causing oil climbing failure.

[0004] In addition, the electrical connections between adjacent wires are exposed, posing a risk of series short circuit.

[0005] Currently, there is a lack of a through-cylinder plastic shell plug-in that can prevent terminals from being connected in series. Summary of the Invention

[0006] In view of the problems existing in the prior art, the present invention provides a universal cylinder-penetrating plastic shell plug-in for oil-cooled motors to solve at least one of the above technical problems.

[0007] In order to achieve the above-mentioned object, the present invention provides a universal cylinder-penetrating molded case insert for oil-cooled motors, characterized in that it comprises an insert body and a wire for passing through the insert body;

[0008] The wire comprises a first wire portion, a crimping terminal, and a second wire portion sequentially connected along an axial direction, wherein the wire cores of the first wire portion and the second wire portion are exposed at adjacent sides, and the exposed wire cores of the first wire portion and the second wire portion are connected via the crimping terminal;

[0009] The plug-in body comprises a glue filling portion, a wire threading portion and a wire outlet portion which are sequentially connected in the axial direction;

[0010] The threading portion is provided with a through hole extending axially therethrough, wherein the through hole includes a terminal hole and a wire hole sequentially connected in the axial direction;

[0011] A limiting end surface for axially limiting the crimping terminal is provided in the terminal hole;

[0012] A baffle structure is fixed to one axial end of the threading portion, and the baffle structure is provided between adjacent perforations in all perforations. The baffle structure is located in the glue-filling portion, and the axial end of the baffle structure does not exceed the axial end face of the plug-in body.

[0013] The present invention optimizes the structure of the wires and connects the first and second wire parts through crimping terminals, thereby avoiding the oil creep problem caused by twisting two wires in the conventional method. The present invention is suitable for use in oil-cooled motors through cylinders.

[0014] In addition, the present invention adds a barrier structure to prevent the exposed terminal portion from being improperly installed during assembly and causing a short circuit.

[0015] Further preferably, one end of the crimping terminal is limitedly disposed in the terminal hole, and the other end of the crimping terminal extends out of the terminal hole.

[0016] When dispensing glue, the fluidity of the glue fills the gaps in the terminal holes to achieve the design purpose of waterproof and oil-proof.

[0017] Further preferably, the axial end of the crimping terminal does not extend beyond the axial end of the barrier structure.

[0018] Further preferably, the crimping terminal comprises a first crimping portion, a central connecting portion and a second crimping portion sequentially connected along the axial direction;

[0019] The first crimping portion is crimped to the core and the insulating outer layer of the first conductive wire, and the second crimping portion is crimped to the core of the second conductive wire;

[0020] The central connecting portion is provided with an outwardly extending extending portion, and the extending portion is used to abut against the inner wall of the terminal hole.

[0021] It is convenient to fix the crimp terminal through the extension.

[0022] Further preferably, the axial length of the baffle structure is 4 mm.

[0023] Avoid short circuits between adjacent crimp terminals.

[0024] Further preferably, the center distance between adjacent perforations is 4.4 mm-5 mm.

[0025] It can effectively avoid the short circuit problem in the part of the crimped terminal exposed at the perforation.

[0026] Further preferably, the axial length of the perforation is 12-13 cm.

[0027] Further preferably, there are ten perforations, eight of which are located radially outward, and two perforations are arranged one above the other and located radially inward.

[0028] Further preferably, the barrier structure includes a first transverse barrier, a second transverse barrier, and a third transverse barrier sequentially arranged from left to right, the distal sides of the first transverse barrier and the second transverse barrier are respectively fixedly connected to the inner wall of the glue-filling portion, and the left and right sides of the second transverse barrier are connected to vertically arranged longitudinal extensions;

[0029] The first transverse partition, the second transverse partition and the third transverse partition are each provided with three perforations arranged from left to right on the upper and lower sides;

[0030] The baffle structure further includes two upper and lower mirror-symmetrically arranged partition baffles, the partition baffles including three circumferentially arranged radially extending partition portions, and adjacent radially extending partition plate portions are adjacent via connecting partition portions;

[0031] The radially extending partition separates adjacent through-holes located radially outward;

[0032] The connecting partition separates the through-hole located radially outward from the through-hole located radially inward.

[0033] Further preferably, a positioning protrusion is fixed on the radial outer side of the glue-filling portion;

[0034] The axial end surface of the glue-filling portion is provided with a wire digital identification body.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] When using the present invention, the crimped terminals are inserted into the terminal holes of the plastic insert. The terminals and the terminal holes engage and lock together to prevent them from being pulled out. The partition wall at the terminal hole prevents cross-talk between the terminals and the exposed terminal parts. Simultaneously, glue is poured into the insert, allowing the glue to fill the hollowed-out areas and penetrate into the terminal holes, thereby achieving a sealing effect. The sealing rubber ring and sealing gasket ensure that the insert and the motor card are airtight and oil-tight. The insert cooperates with the board end, and the retaining spring engages the retaining spring groove of the plastic shell, forming a closed loop, which keeps the insert body fixed and seals it. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A cross-sectional view of the specific embodiment 1 of the present invention in an assembled state with an opening of an oil-cooled motor;

[0038] Figure 2 This is a structural diagram of a specific embodiment 1 of the present invention;

[0039] Figure 3This is a schematic diagram of a half-section state of a specific embodiment 1 of the present invention;

[0040] Figure 4 This is a structural diagram of another perspective of the specific embodiment 1 of the present invention;

[0041] Figure 5 Schematic diagram of the structure of the wire of the specific embodiment 1 of the present invention;

[0042] Figure 6 It is a partial cross-sectional view of a specific embodiment 1 of the present invention;

[0043] Figure 7 This is a partial schematic diagram of the specific embodiment 1 of the present invention in an assembled state with an opening of an oil-cooled motor;

[0044] Figure 8 It is a partial schematic diagram of the specific embodiment 1 of the present invention in the assembled state with the opening of the oil-cooled motor.

[0045] In the figure: 1 is the plug-in body, 2 is the wire, 3 is the oil-cooled motor mounting end, 11 is the glue filling part, 12 is the perforation, 13 is the wire outlet part, 21 is the first wire part, 22 is the second wire part, 23 is the crimping terminal, 111 is the first transverse partition, 112 is the second transverse partition, 113 is the third transverse partition, 114 is the radially extending partition, and 115 is the connecting partition. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] See also Figures 1 to 8, Specific embodiment 1: A universal through-cylinder plastic shell plug-in for oil-cooled motors, comprising a plug-in body and a wire 2 for passing through the plug-in body 1; the wire 2 comprises a first wire portion 21, a crimping terminal 23 and a second wire portion 22 connected in sequence along the axial direction, the wire cores of the first wire portion 21 and the second wire portion 22 are exposed on the adjacent sides, and the exposed wire cores of the first wire portion 21 and the second wire portion 22 are connected through the crimping terminal 23; the plug-in body 1 comprises a glue-filling portion 11, a threading portion and a wire outlet portion 13 connected in sequence in the axial direction; an axially penetrating through-hole 12 is provided on the threading portion, the threading portion 12 comprises a terminal hole and a wire hole connected in sequence in the axial direction; a limiting end face for axially limiting the crimping terminal 23 is provided in the terminal hole; a barrier structure is fixed to one axial end of the threading portion, and a barrier structure is provided between adjacent through-holes 12 in all the through-holes 12, the barrier structure is located in the glue-filling portion 11, and the axial end of the barrier structure does not exceed the axial end face of the plug-in body 1. The present invention optimizes the structure of the wires and connects the first wire portion 21 and the second wire portion 22 through a crimping terminal 23, thereby avoiding the oil creep problem caused by the twisting of two traditional wires. The present invention is suitable for use through the cylinder in an oil-cooled motor environment. In addition, the present invention adds a barrier structure to prevent the exposed terminal portion from being improperly installed during assembly, causing a short circuit. This device is used to pass through the opening provided at the mounting end 3 of the oil-cooled motor. The first wire portion 21 is located inside the oil-cooled motor. The second wire portion 22 is located outside the oil-cooled motor.

[0048] The outer wall of the plug-in body is covered with at least two waterproof rubber rings, which are sandwiched between the plug-in body and the opening of the oil-cooled motor mounting end 3. The plug-in body is provided with a limit hole for a limit spring. The limit spring abuts against the end surface of the motor mounting end 3.

[0049] The terminal hole includes a first flared portion, a circular hole portion, and a second flared portion, which are sequentially connected along the axial direction. The second flared portion is connected to the wire hole. The inner diameter of the first flared portion increases axially from the portion adjacent to the circular hole portion to the portion distal to the circular hole portion. The inner diameter of the second flared portion decreases axially from the portion adjacent to the circular hole portion to the portion distal to the circular hole portion.

[0050] One end of the crimp terminal 23 is positioned within the terminal hole, while the other end extends beyond the hole. This facilitates dispensing, allowing the fluidity of the glue to fill the gap in the terminal hole, achieving a waterproof and oil-resistant design. The glue flows from the glue filling area through the perforation to the wire outlet.

[0051] The axial end of the crimping terminal 23 does not extend beyond the axial end of the barrier structure.

[0052] The crimping terminal 23 comprises a first crimping portion, a central connecting portion, and a second crimping portion, connected in axial sequence. The first crimping portion crimps the core and insulation sheath of the first conductor, while the second crimping portion crimps the core of the second conductor. The central connecting portion is provided with an outwardly extending extension, which is designed to abut against the inner wall of the terminal hole. This extension facilitates securing the crimping terminal 23.

[0053] The axial length of the barrier structure is 4 mm, which prevents adjacent crimping terminals 23 from contacting and short-circuiting.

[0054] The center distance between adjacent through-holes 12 is 4.4 mm to 5 mm, which can effectively avoid the short circuit problem of the part of the crimping terminal 23 exposed at the through-hole 12.

[0055] The axial length of the through-hole 12 is 12-13 cm.

[0056] Ten through-holes 12 are provided, eight of which are located radially outward, and two of which are arranged one above the other and located radially inward.

[0057] The barrier structure includes a first transverse barrier 111, a second transverse barrier 112 and a third transverse barrier 113 which are arranged in sequence from left to right. The distal sides of the first transverse barrier 111 and the second transverse barrier 112 are respectively fixedly connected to the inner wall of the glue filling part 11, and the left and right sides of the second transverse barrier 112 are connected with vertically arranged longitudinal extension parts; the upper and lower sides of the first transverse barrier 111, the second transverse barrier 112 and the third transverse barrier 113 are each provided with three through-holes 12 arranged from left to right; the barrier structure also includes two upper and lower mirror-symmetrically arranged partition barriers, the partition barriers include three circumferentially arranged radially extending partition parts 114, and adjacent radially extending partition plate parts are adjacent to each other through connecting partition parts 115; the radially extending partition parts 114 separate adjacent through-holes 12 on the radial outside; the connecting partition parts 115 separate the through-holes 12 on the radial outside from the through-holes 12 on the radial inside.

[0058] A positioning protrusion is fixed on the radial outer side of the glue-filling part 11 ; and a wire digital identification body is provided on the axial end face of the glue-filling part 11 .

[0059] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A universal cylinder-penetrating plastic shell plug-in for oil-cooled motors, characterized in that: It includes a plug-in body and a wire for passing through the plug-in body; The wire comprises a first wire portion, a crimping terminal, and a second wire portion sequentially connected along an axial direction, wherein the wire cores of the first wire portion and the second wire portion are exposed at adjacent sides, and the exposed wire cores of the first wire portion and the second wire portion are connected via the crimping terminal; The plug-in body comprises a glue filling portion, a wire threading portion and a wire outlet portion which are sequentially connected in the axial direction; The threading portion is provided with a through hole extending axially therethrough, wherein the through hole includes a terminal hole and a wire hole sequentially connected in the axial direction; A limiting end surface for axially limiting the crimping terminal is provided in the terminal hole; A baffle structure is fixed to one axial end of the threading portion, and the baffle structure is provided between adjacent perforations in all perforations. The baffle structure is located in the glue-filling portion, and the axial end of the baffle structure does not exceed the axial end face of the plug-in body.

2. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: One end of the crimping terminal is limitedly disposed in the terminal hole, and the other end of the crimping terminal extends out of the terminal hole.

3. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: An axial end portion of the crimping terminal does not extend beyond an axial end portion of the barrier structure.

4. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: The crimping terminal comprises a first crimping portion, a central connecting portion and a second crimping portion sequentially connected along the axial direction; The first crimping portion is crimped to the core and the insulating outer layer of the first conductive wire, and the second crimping portion is crimped to the core of the second conductive wire; The central connecting portion is provided with an outwardly extending extending portion, and the extending portion is used to abut against the inner wall of the terminal hole.

5. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: The axial length of the baffle structure is 4 mm.

6. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: The center distance between adjacent perforations is 4.4 mm to 5 mm.

7. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: The axial length of the perforation is 12-13 cm.

8. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: There are ten perforations, eight of which are located radially outward, and two are arranged up and down and located radially inward.

9. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 8, characterized in that: The barrier structure includes a first transverse barrier, a second transverse barrier, and a third transverse barrier arranged in sequence from left to right, wherein the distal sides of the first transverse barrier and the second transverse barrier are respectively fixedly connected to the inner wall of the glue-filling portion, and the left and right sides of the second transverse barrier are connected to vertically arranged longitudinal extension portions; The first transverse partition, the second transverse partition and the third transverse partition are each provided with three perforations arranged from left to right on the upper and lower sides; The baffle structure further includes two upper and lower mirror-symmetrically arranged partition baffles, the partition baffles including three circumferentially arranged radially extending partition portions, and adjacent radially extending partition plate portions are adjacent via connecting partition portions; The radially extending partition separates adjacent through-holes located radially outward; The connecting partition separates the through-hole located radially outward from the through-hole located radially inward.

10. The universal cylinder-penetrating plastic shell insert for oil-cooled motors according to claim 1, characterized in that: A positioning protrusion is fixed on the radial outer side of the glue filling portion; The axial end surface of the glue-filling portion is provided with a wire digital identification body.

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