Low-pressure cylinder penetrating part of oil-cooled motor

Abstract

The invention discloses a low-pressure cylinder penetrating part of an oil-cooled motor, and relates to the technical field of oil-cooled motor sealing, and the low-pressure cylinder penetrating part comprises a shell which is provided with a first cavity; the low-pressure cylinder penetrating piece body is fixedly installed in the first cavity, a second cavity is formed in the low-pressure cylinder penetrating piece body, a first sealing part, a sealing plug and a second sealing part are sequentially arranged in the second cavity, and the first sealing part, the sealing plug and the second sealing part are all in close fit with the inner wall of the low-pressure cylinder penetrating piece body; a plurality of wire passing holes in the horizontal direction are formed in the sealing plug; the low-voltage wire harness sequentially penetrates through the first sealing part, the sealing plug and the second sealing part in the second cavity and extends outwards; according to the scheme, a plurality of existing small sealing plugs are designed into an integral sealing plug, on one hand, the manufacturing difficulty of the sealing plug is reduced, and on the other hand, during installation, the sealing plug and the low-voltage wire harness can be integrally assembled, so that the installation difficulty is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] The invention relates to a low-pressure cylinder penetration component of an oil-cooled motor, belonging to the technical field of oil-cooled motor sealing. Background Art

[0002] The existing oil-cooled motor sealing technology requires that the low-voltage wire harnesses be passed through the low-voltage cylinder sealing plugs one by one, and then the sealing plugs are inserted into the low-voltage cylinder parts respectively. Since the sealing plugs are very small and there are dimensional errors in injection molding, this makes the installation difficult, time-consuming and labor-intensive during the actual assembly process, and the air tightness is also poor. In addition, the low-voltage wire harness signal line is a copper stranded wire, and the gap between the wire core and the wire sheath varies randomly, resulting in poor air tightness. After the air tightness test, when the pressure is 0.025MPa, the pressure is maintained for 60s, and the test is performed for 10s, the leakage volume is greater than 20mL / min (cavity volume 8.5L); at the same time, the low-pressure cylinder part is sealed as a whole through the gluing radial seal and the low-pressure cylinder part sealing ring cooperates with the shell to achieve sealing. The gluing radial seal has low production efficiency and affects the assembly cleanliness. Therefore, a new solution is needed to solve this problem. Summary of the invention

[0003] In view of the above-mentioned technical problems, the purpose of the present invention is to provide a low-pressure cylinder penetration component for an oil-cooled motor.

[0004] The technical solution of the present invention is achieved as follows: a low-pressure cylinder wear part of an oil-cooled motor, comprising

[0005] A shell, wherein a first cavity is formed on the shell;

[0006] A low-pressure cylinder body, wherein the low-pressure cylinder body is fixedly mounted in the first cavity, a second cavity is formed on the low-pressure cylinder body, a first sealing portion, a sealing plug and a second sealing portion are sequentially disposed in the second cavity, the first sealing portion, the sealing plug and the second sealing portion are tightly matched with the inner wall of the low-pressure cylinder body, and a plurality of horizontal wire holes are formed on the sealing plug;

[0007] A low-voltage wiring harness, which passes through the first sealing part, the sealing plug and the second sealing part in the second cavity in sequence and extends outward; the low-voltage wiring harness is composed of a plurality of wire cores, the number of which is the same as the number of wire holes on the sealing plug and corresponds one to one; a transition section is provided on each wire core located in the second cavity, the transition section is fixedly connected to the wire cores at both ends thereof, and connecting surfaces are formed at both ends of the transition section, and the connecting surfaces at both ends of the transition section are respectively buried in the first sealing part and the second sealing part.

[0008] Preferably, the transition section is a PIN needle or a single-strand copper wire, and the outer diameter of the transition section is greater than or equal to the aperture of the wire hole.

[0009] Preferably, the transition section and the wire cores at both ends are fixed by crimping or welding.

[0010] Preferably, the first sealing part and the second sealing part are both sealants.

[0011] Preferably, a double-lip sealing ring is provided on the outer wall of the low-pressure cylinder body, and the low-pressure cylinder body is tightly matched with the housing through the double-lip sealing ring.

[0012] Preferably, the outer end of the low-pressure cylinder body has a first annular protrusion, and a conical sealing ring is provided on the first annular protrusion. The first annular protrusion is tightly matched with the housing through the conical sealing ring.

[0013] Preferably, the first annular protrusion has a mounting portion, the mounting portion is fixed to the housing by means of screws, and a steel sleeve matching the screws is arranged on the outer side of the screws.

[0014] Preferably, the sealing plug has a second annular protrusion at one end close to the first sealing part, the diameter of the second annular protrusion is the same as the diameter of the first sealing part, and the sealing plug has a third annular protrusion at one end close to the second sealing part, the diameter of the third annular protrusion is the same as the diameter of the second sealing part.

[0015] Preferably, a groove structure is formed between the second annular protrusion and the third annular protrusion, and the inner wall of the low-pressure cylinder body has a protrusion structure that matches the shape of the groove structure, and the outer diameter of the groove structure is equal to the inner diameter of the protrusion structure, and the low-pressure cylinder body cooperates with the groove structure on the sealing plug through the protrusion structure.

[0016] Preferably, one end of the low-voltage wiring harness extending out of the second sealing portion is provided with a heat shrink sleeve and a low-voltage connector, the low-voltage wiring harness passes through the heat shrink sleeve, and the end of the low-voltage wiring harness is connected and fixed to the low-voltage connector.

[0017] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0018] 1. The present invention designs the existing multiple small sealing plugs into an integral sealing plug, which reduces the difficulty of making the sealing plug on the one hand, and on the other hand, during installation, the sealing plug and the low-voltage wiring harness can be assembled as a whole, thereby reducing the difficulty of installation and improving the installation efficiency.

[0019] 2. By using a PIN needle or a single-strand copper wire to transfer a section of the low-voltage wire harness inside the low-voltage cylinder body, and burying the connecting surfaces at both ends of the transfer section in the first sealing part and the second sealing part respectively, the problem of air leakage caused by the gap between the wire core and the wire sheath of the low-voltage wire harness due to the copper stranded wire can be avoided, thereby improving the sealing effect.

[0020] 3. By arranging a double-lip sealing ring and a conical sealing ring on the outer wall of the low-pressure cylinder body, on the basis of ensuring the sealing between the low-pressure cylinder body and the shell, not only the assembly difficulty is reduced, the assembly efficiency is improved, but also the assembly cleanliness is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0022] Attached Figure 1 It is a structural schematic diagram of a low-pressure cylinder penetration member of an oil-cooled motor according to the present invention;

[0023] Attached Figure 2 For attachment Figure 1 A schematic diagram of the structure from another perspective;

[0024] Attached Figure 3 It is a cross-sectional view of a low-pressure cylinder penetration member of an oil-cooled motor according to the present invention;

[0025] Attached Figure 4 For attachment Figure 3 The enlarged view of point A in the middle;

[0026] Attached Figure 5 It is a structural schematic diagram of the low-pressure cylinder-piercing member body of the present invention;

[0027] Attached Figure 6 It is a schematic structural diagram of the sealing plug of the present invention.

[0028] In the figure: 1. Shell; 11. First cavity; 2. Low-pressure cylinder body; 21. Second cavity; 22. First sealing portion; 23. Sealing plug; 231. Wire hole; 232. Second annular protrusion; 233. Third annular protrusion; 234. Groove structure; 24. Second sealing portion; 25. Double-lip sealing ring; 26. First annular protrusion; 261. Mounting portion; 262. Screw; 263. Steel sleeve; 264. Conical sealing ring; 27. Protrusion structure; 3. Low-voltage wiring harness; 31. Wire core; 311. Adapter section; 312. Connecting surface; 4. Heat shrink tubing; 5. Low-voltage connector. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "straight", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] As attached Figure 1-2 As shown, a low-pressure cylinder penetration component of an oil-cooled motor described in the present invention comprises a shell 1, a low-pressure cylinder penetration component body 2 and a low-voltage wiring harness 3, and a first cavity 11 is opened on the shell 1.

[0033] The low-pressure cylinder body 2 is fixedly installed in the first cavity 11. Figure 2 In this embodiment, the outer end of the low-pressure cylinder body 2 has a first annular protrusion 26, and the first annular protrusion 26 has a mounting portion 261. The mounting portion 261 is fixed to the housing 1 by a screw 262, and a steel sleeve 263 matching the screw 262 is provided on the outer side of the screw 262 to make the connection between the mounting portion 261 and the housing 1 more stable.

[0034] As attached Figure 3-6 As shown, a second cavity 21 is opened on the low-pressure cylinder body 2, and a first sealing portion 22, a sealing plug 23 and a second sealing portion 24 are sequentially arranged in the second cavity 21. In this embodiment, the first sealing portion 22 and the second sealing portion 24 are both sealants.

[0035] The first sealing part 22, the sealing plug 23 and the second sealing part 24 are all tightly matched with the inner wall of the low-pressure cylinder body 2. Specifically, the sealing plug 23 has a second annular protrusion 232 at one end close to the first sealing part 22, and the diameter of the second annular protrusion 232 is the same as the diameter of the first sealing part 22. The sealing plug 23 has a third annular protrusion 233 at one end close to the second sealing part 24, and the diameter of the third annular protrusion 233 is the same as the diameter of the second sealing part 24. The two ends of the sealing plug 23 are tightly against the inner wall of the low-pressure cylinder body 2 through the second annular protrusion 232 and the third annular protrusion 233, thereby improving the connection stability.

[0036] A groove structure 234 is formed between the second annular protrusion 232 and the third annular protrusion 233. The inner wall of the low-pressure cylinder body 2 has a protrusion structure 27 that matches the shape of the groove structure 234, and the outer diameter of the groove structure 234 is equal to the inner diameter of the protrusion structure 27. The low-pressure cylinder body 2 cooperates with the groove structure 234 on the sealing plug 23 through the protrusion structure 27, thereby further improving the connection stability between the low-pressure cylinder body 2 and the sealing plug 23.

[0037] The low-voltage wiring harness 3 passes through the first sealing portion 22, the sealing plug 23 and the second sealing portion 24 in the second cavity 21 in sequence and extends outward; in this embodiment, the sealing plug 23 is made of silicone, and the hardness of the sealing plug 23 is not higher than the Shore hardness 60HA, so that the sealing plug 23 can be easily assembled into the second cavity 21, and a plurality of horizontal wire holes 231 are opened on the sealing plug 23.

[0038] The low-voltage wiring harness 3 is composed of a plurality of wire cores 31 , the number of the wire cores 31 is the same as the number of the wire holes 231 on the sealing plug 23 , and they correspond one to one. The plurality of wire cores 31 pass through the plurality of wire holes 231 on the sealing plug 23 .

[0039] Compared with the prior art, the present application designs the existing multiple small sealing plugs into an integral sealing plug 23, which on the one hand reduces the difficulty of making the sealing plug 23, and on the other hand, during installation, the sealing plug 23 and the low-voltage wiring harness 3 can be assembled as a whole, thereby reducing the difficulty of installation and improving installation efficiency.

[0040] As attached Figure 4 As shown, a transition section 311 is provided on each wire core 31 in the second cavity 21, and the outer diameter of the transition section 311 is greater than or equal to the aperture of the wire hole 231. Since the sealing plug 23 is made of silicone material, the elastic deformation characteristic of silicone material is utilized to make the connection between the transition section 311 and the wire hole 231 of the sealing plug 23 tighter and more firmly.

[0041] In this embodiment, the transition section 311 is a PIN needle or a single-strand copper wire, and the transition section 311 is connected and fixed to the wire cores 31 at both ends. Specifically, the transition section 311 and the wire cores 31 at both ends are fixed by crimping or welding, and connecting surfaces 312 are formed at both ends of the transition section 311, and the connecting surfaces 312 at both ends of the transition section 311 are respectively buried in the first sealing portion 22 and the second sealing portion 24.

[0042] By using a PIN needle or a single-strand copper wire to transfer a section of the low-voltage wiring harness 3 inside the low-voltage cylinder body 2, and burying the connecting surfaces 312 at both ends of the transfer section 311 in the first sealing part 22 and the second sealing part 24 respectively, the problem of air leakage caused by the gap between the wire core 31 and the wire sheath of the low-voltage wiring harness 3 due to the copper stranded wire can be avoided, thereby improving the sealing effect.

[0043] A double-lip sealing ring 25 is provided on the outer wall of the low-pressure cylinder body 2, and the low-pressure cylinder body 2 is tightly matched with the housing 1 through the double-lip sealing ring 25; a conical sealing ring 264 is provided on the first annular protrusion 26, and the first annular protrusion 26 is tightly matched with the housing 1 through the conical sealing ring 264.

[0044] By providing a double-lip sealing ring 25 and a conical sealing ring 264 on the outer wall of the low-pressure cylinder body 2, the sealing between the low-pressure cylinder body 2 and the shell 1 is ensured, which not only reduces the assembly difficulty and improves the assembly efficiency, but also improves the assembly cleanliness.

[0045] One end of the low-voltage wire harness 3 extending out of the second sealing portion 24 is provided with a heat shrink sleeve 4 and a low-voltage connector 5 . The low-voltage wire harness 3 passes through the heat shrink sleeve 4 , and the end of the low-voltage wire harness 3 is connected and fixed to the low-voltage connector 5 .

[0046] The assembly process of the present invention is as follows:

[0047] First, the multiple cores 31 of the low-voltage wiring harness 3 are respectively passed through the multiple wire holes 231 of the sealing plug 23, and then the sealing plug 23 and the low-voltage wiring harness 3 are installed as a whole in the second cavity of the low-voltage cylinder body 2. In order to solve the problem that the low-voltage wiring harness 3 is a copper stranded wire and has poor air tightness, each core 31 of the low-voltage wiring harness 3 is transferred by a PIN needle or a single-strand copper wire, and the two ends of the transfer section 311 are fixed to the core 31 by crimping or welding. Then, sealant is applied on both sides of the sealing plug 23, namely the first sealing part 22 and the second sealing part 24, and the connecting surfaces 312 of the two ends of the transfer section 311 and the core 31 are buried in the sealant to achieve a sealing effect. The low-pressure cylinder body 2 is radially sealed with the shell 1 through a double-lip sealing ring 25 and a conical sealing ring 264. Finally, the low-pressure cylinder body 2 is fixed to the shell 1 by screws 262.

[0048] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-pressure cylinder-piercing member for an oil-cooled motor, characterized in that: Include A shell (1), wherein a first cavity (11) is formed on the shell (1); A low-pressure cylinder-piercing member body (2), wherein the low-pressure cylinder-piercing member body (2) is fixedly installed in the first cavity (11), a second cavity (21) is opened on the low-pressure cylinder-piercing member body (2), a first sealing portion (22), a sealing plug (23) and a second sealing portion (24) are sequentially arranged in the second cavity (21), the first sealing portion (22), the sealing plug (23) and the second sealing portion (24) are all tightly matched with the inner wall of the low-pressure cylinder-piercing member body (2), and a plurality of horizontal wire holes (231) are opened on the sealing plug (23); A low-voltage wire harness (3), wherein the low-voltage wire harness (3) sequentially passes through a first sealing portion (22), a sealing plug (23) and a second sealing portion (24) in a second cavity (21) and extends outward; the low-voltage wire harness (3) is composed of a plurality of wire cores (31), the number of the wire cores (31) being the same as the number of wire holes (231) on the sealing plug (23) and corresponding to each other; a transition section (311) is provided on each wire core (31) in the second cavity (21), the transition section (311) is connected and fixed to the wire cores (31) at both ends thereof, and connection surfaces (312) are formed at both ends of the transition section (311), and the connection surfaces (312) at both ends of the transition section (311) are respectively buried in the first sealing portion (22) and the second sealing portion (24).

2. The low-pressure cylinder-piercing member of an oil-cooled motor according to claim 1, characterized in that: The transition section (311) is a PIN needle or a single-strand copper wire, and the outer diameter of the transition section (311) is greater than or equal to the hole diameter of the wire hole (231).

3. A low-pressure cylinder piercing member for an oil-cooled motor according to claim 1 or 2, characterized in that: The transition section (311) and the wire cores (31) at both ends thereof are fixed by crimping or welding.

4. The low-pressure cylinder penetration member of an oil-cooled motor according to claim 1, characterized in that: The first sealing portion (22) and the second sealing portion (24) are both sealants.

5. The low-pressure cylinder penetration member of an oil-cooled motor according to claim 1, characterized in that: A double-lip sealing ring (25) is provided on the outer wall of the low-pressure cylinder body (2), and the low-pressure cylinder body (2) is tightly matched with the housing (1) through the double-lip sealing ring (25).

6. The low-pressure cylinder penetration member of an oil-cooled motor according to claim 1, characterized in that: The outer end of the low-pressure cylinder body (2) has a first annular protrusion (26), and a conical sealing ring (264) is provided on the first annular protrusion (26). The first annular protrusion (26) is tightly matched with the housing (1) through the conical sealing ring (264).

7. The low-pressure cylinder penetration member of an oil-cooled motor according to claim 6, characterized in that: The first annular protrusion (26) has a mounting portion (261), and the mounting portion (261) is fixed to the housing (1) via a screw (262), and a steel sleeve (263) matching the screw (262) is arranged on the outer side of the screw (262).

8. The low-pressure cylinder penetration member of an oil-cooled motor according to claim 1, characterized in that: The sealing plug (23) has a second annular protrusion (232) at one end close to the first sealing portion (22), and the diameter of the second annular protrusion (232) is the same as the diameter of the first sealing portion (22). The sealing plug (23) has a third annular protrusion (233) at one end close to the second sealing portion (24), and the diameter of the third annular protrusion (233) is the same as the diameter of the second sealing portion (24).

9. The low-pressure cylinder penetration member of an oil-cooled motor according to claim 8, characterized in that: A groove structure (234) is formed between the second annular protrusion (232) and the third annular protrusion (233); the inner wall of the low-pressure cylinder body (2) has a protrusion structure (27) that matches the shape of the groove structure (234); the outer diameter of the groove structure (234) is equal to the inner diameter of the protrusion structure (27); the low-pressure cylinder body (2) cooperates with the groove structure (234) on the sealing plug (23) through the protrusion structure (27).

10. The low-pressure cylinder penetration member of an oil-cooled motor according to claim 1, characterized in that: One end of the low-voltage wire harness (3) extending out of the second sealing portion (24) is provided with a heat shrink sleeve (4) and a low-voltage connector (5); the low-voltage wire harness (3) passes through the heat shrink sleeve (4), and the end of the low-voltage wire harness (3) is connected and fixed to the low-voltage connector (5).

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