Sealing connection structure and vehicle driving system

Abstract

The invention provides a sealing connection structure and a vehicle driving system. The sealing connection structure comprises a first shell, a second shell, a cable, a sleeve, a sealing piece and a nut. The first housing includes a first wall portion defining a first window. The second housing includes a second wall portion defining a second window. The first window and the second window overlap each other in the thickness direction. The sleeve sleeves the cable in a sealing manner. The seal is inserted into the first window. The sealing piece is in a circular truncated cone shape and is sleeved on the sleeve in a sealing mode. And the nut is screwed with the sleeve. The nut abuts against the large-diameter end face of the sealing piece, so that the interface of the outer circumferential face of the sealing piece and the inner circumferential face of the first window forms a first sealing interface, and the interface of the small-diameter end face of the sealing piece and the outer wall face of the second wall part forms a second sealing interface. In this way, the sealing connection structure is easy to use and has high reliability, and the use environment of the sealing connection structure is not prone to being limited.

Description

Technical Field

[0001] The present application relates to the field of electrical connection, and more specifically to a sealed connection structure and a vehicle drive system. Background Art

[0002] It is known that the power electronic integrated module (PEU) is electrically connected to the resolver via a plug and a low-voltage cable. For an eAxle using an oil cooling solution, the power electronic integrated module and the resolver are respectively housed in different housings. The wall of the housing can be provided with a through window, and the windows of the two housings are aligned with each other. The low-voltage cables in different housings can be connected via a joint at the window. A plurality of sealing rings need to be provided at the window to prevent the cooling oil from contaminating the power electronic integrated module and the contaminants outside the housing from entering the housing.

[0003] However, the existing connection method has the following shortcomings.

[0004] The reliability of the connection method is low. Specifically, in one possible method, the joint passes through the windows (mounting holes) of the two shells, and the sealing ring can be arranged between the joint and the shell, and the two sealing rings are arranged coaxially. Under this configuration, the two windows need to have a high coaxiality to ensure that both sealing rings have a uniform compression amount. However, due to the processing error and assembly error of the shell, the coaxiality of the two windows is difficult to ensure.

[0005] The use scenarios of the connection method are limited. Specifically, in another possible method, at least one sealing ring can be arranged between the two shells. Under this configuration, the two shells need to be pressed against each other in the through-direction of the window (the axial direction of the window) to ensure that the sealing ring has sufficient compression. However, in some cases, the shells are tightened in a direction perpendicular to the through-direction, making it difficult to press against each other in the through-direction of the window. Summary of the invention

[0006] This application is made in view of the above-mentioned state of the prior art. The purpose of this application is to provide a sealed connection structure and a vehicle drive system, which can overcome or alleviate at least one of the disadvantages described in the above-mentioned background technology.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions.

[0008] The present application provides a sealing connection structure as follows, comprising: a first shell, which includes a first wall portion, the first wall portion defines a first window, the first window penetrates the first wall portion in the thickness direction of the first wall portion, the first window is truncated cone-shaped, the central axis of the first window is parallel to the thickness direction, the small diameter end of the first window is located on the outer wall surface of the first wall portion, and the large diameter end of the first window is located on the inner wall surface of the first wall portion; a second shell, which includes a second wall portion, the first wall portion and the second wall portion have the same thickness direction, the second wall portion defines a second window, and the second window penetrates the second wall portion in the thickness direction. , the first window and the second window overlap each other in the thickness direction; a cable; a sleeve, whose sealing sleeve is arranged on the cable; a seal, which is inserted into the first window, the seal is truncated cone-shaped, and the seal sealing sleeve is arranged on the sleeve; and a nut, which is threaded with the sleeve, wherein the nut is configured to press against the large-diameter end face of the seal, so that the interface between the outer peripheral surface of the seal and the inner peripheral surface of the first window forms a first sealing interface, and the interface between the small-diameter end face of the seal and the outer wall surface of the second wall portion forms a second sealing interface, and the first sealing interface and the second sealing interface extend all around the circumference of the seal.

[0009] In an optional solution, the second window is cylindrical, the central axis of the second window is parallel to the thickness direction, and the first window and the second window are coaxially arranged.

[0010] In another optional scheme, the diameter of the second window is smaller than the diameter of the small diameter end of the first window, and the outer wall surface of the first wall portion abuts against the outer wall surface of the second wall portion, so that a portion of the outer wall surface of the second wall portion and the inner circumferential surface of the first window together form an annular step portion, and the small diameter end surface of the seal presses against the outer wall surface of the second wall portion at the step portion.

[0011] In another optional scheme, it includes: a first cable serving as the cable; a first connector electrically connected to one end of the first cable; a second cable; and a second connector electrically connected to one end of the second cable, the first connector and the second connector being detachably plugged into each other, and the first cable being electrically connected to the second cable via the first connector and the second connector.

[0012] In another optional solution, at least one of the first cable, the first connector, the second cable and the second connector is fixedly connected to the first shell and / or the second shell.

[0013] In another optional scheme, it also includes a first fastener and a second fastener, the first fastener fixes the first shell in a first installation direction, the first installation direction is perpendicular to the thickness direction, and the second fastener fixes the second shell in a second installation direction, the second installation direction is perpendicular to the thickness direction.

[0014] In another optional solution, the inner circumferential surface of the first window and the outer circumferential surface of the sealing member have the same taper, and the first window and the sealing member are interference fit.

[0015] In another optional solution, the sealing member is made of rubber, the sleeve is made of metal, and the sealing member is bonded to or interference-fitted with the sleeve.

[0016] In another optional solution, the cable is bonded or slidably connected to the sleeve.

[0017] The present application also provides a vehicle drive system as follows, comprising: the above-mentioned sealed connection structure; a power component, which includes a rotating transformer, and the rotating transformer is accommodated in the first shell; and a control component, which includes a power electronic integrated module, and the power electronic integrated module is accommodated in the second shell, wherein the rotating transformer is electrically connected to the power electronic integrated module via the cable.

[0018] By adopting the above technical solution, the seal is insensitive to the relative position relationship between the first window and the second window, so that the sealing connection structure has a higher reliability. The sealing connection structure requires fewer seals, and the installation process of the sealing connection structure is also relatively simple, making the sealing connection structure easy to use. The pressure at the sealing interface is provided by the nut, which is independent of the connection method of the first shell and the second shell, so that the use environment of the sealing connection structure is not easily restricted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a vehicle driving system according to an embodiment of the present application is shown.

[0020] Figure 2 Shows Figure 1 Schematic diagram of the sealed connection structure of the vehicle drive system, in which the second cable and the second connector are omitted.

[0021] Figure 3 Shows Figure 2 Exploded view of the sealed connection structure.

[0022] Figure 4 Shows Figure 1 A cross-sectional view of a vehicle drive system in which some components are omitted.

[0023] Description of Reference Numerals

[0024] 1 sealing connection structure; 11 first cable; 12 first joint; 13 second cable; 14 second joint; 15 sleeve; 16 sealing member; 17 nut;

[0025] 2 power assembly; 21 first housing; 211 first wall; 21a first window; 22 rotary transformer; 23 motor;

[0026] 3 control assembly; 31 second housing; 311 second wall portion; 312 step portion; 31a second window;

[0027] T thickness direction. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all feasible methods of the present application, nor to limit the scope of the present application.

[0029] Figures 1 to 4 A vehicle driving system according to an embodiment of the present application is shown, in particular, a vehicle driving system suitable for an electric vehicle or a hybrid vehicle.

[0030] The vehicle driving system may include a sealed connection structure 1 , a power component 2 , and a control component 3 .

[0031] The sealing connection structure 1 may include a first cable 11, a first connector 12, a second cable 13, a second connector 14, a sleeve 15, a seal 16 and a nut 17. Specifically, the first connector 12 may be a female connector, which may be electrically connected to one end of the first cable 11 ( Figures 2 to 4 The upper end of the second connector 14 can be a male connector, which can be electrically connected to one end of the second cable 13. The first connector 12 and the second connector 14 can be detachably plugged into each other, so that the first cable 11 can be electrically connected to the second cable 13 via the first connector 12 and the second connector 14. The sleeve 15 can be made of a metal such as aluminum (including aluminum alloy), which can be sealed and fixedly sleeved on the first cable 11, for example, it can be bonded to the first cable 11. The seal 16 can be truncated cone-shaped, which can be sealed and fixedly sleeved on the sleeve 15, for example, it can be bonded to or interference fit with the sleeve 15. The nut 17 can be made of a metal such as aluminum, which can be screwed with the sleeve 15. The end of the nut 17 ( Figures 2 to 4 The upper end portion in the middle) can be against the large diameter end surface of the seal 16 ( Figures 2 to 4 the lower end surface in the figure).

[0032] The sealing connection structure 1 may include an insulating material. Specifically, the first cable 11 and the second cable 13 may include an insulating layer, and the insulating layer may be made of polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE) or glass fiber. The first connector 12 and the second connector 14 may include a main body for providing a plug-in structure, and the main body may be made of resin, for example, polybutylene terephthalate (PBT). The seal 16 may be made of rubber, for example, fluororubber (FKM) or acrylic rubber (ACM). In this configuration, the seal 16 may be bonded to the sleeve 15 by injection molding or vulcanization.

[0033] The power assembly 2 may include a first housing 21, a rotary transformer 22, and a motor 23. Specifically, the first housing 21 may include a first wall portion 211. The first wall portion 211 may define a first window 21a, and the first window 21a may penetrate the first wall portion 211 in the thickness direction T of the first wall portion 211. The first window 21a may be truncated cone-shaped, and its central axis may be parallel to the thickness direction T. The small diameter end of the first window 21a may be located on the outer wall surface ( Figure 4 The large diameter end of the first window 21a may be located on the inner wall surface of the first wall portion 211 ( Figure 4 The first window 21a and the seal 16 may have the same taper, and the seal 16 may be provided from the large diameter end of the first window 21a ( Figure 4 The first housing 21 can be fixedly mounted to other components by a fastener (an example of the first fastener, not shown in the figure), and the fastener can fix the first housing 21 in an installation direction perpendicular to the thickness direction T (an example of the first installation direction, i.e., the direction in which the fastener applies force to the first housing 21). The rotary transformer 22 and the motor 23 can be accommodated in the first housing 21, and the other end of the first cable 11 ( Figures 2 to 4 The lower end of the ) can be electrically connected to the rotary transformer 22.

[0034] The control component 3 may include a second shell 31 and a power electronic integrated module. Specifically, the second shell 31 may include a second wall portion 311. The second wall portion 311 may define a second window 31a, and the second window 31a may penetrate the second wall portion 311 in the thickness direction T of the second wall portion 311. The second window 31a may be cylindrical, and its central axis may be parallel to the thickness direction T. The outer wall surface of the first wall portion 211 may abut against the outer wall surface of the second wall portion 311, so that the thickness directions T of the first wall portion 211 and the second wall portion 311 are the same. The first window 21a and the second window 31a may overlap each other in the thickness direction T, for example, may be coaxially arranged. The diameter of the second window 31a may be smaller than the small diameter end ( Figures 2 to 4 The diameter of the upper end of the second wall portion 311 is such that the outer wall surface of the second wall portion 311 ( Figure 4 The lower surface of the first window 31a and the inner peripheral surface of the first window 31a form an annular step portion 312. One end of the first cable 11 ( Figures 2 to 4 The upper end of the second connector 13 can be inserted into the second window 31a, and the first connector 12 can be partially located in the second window 31a. The second connector 14 can be fixedly installed on the second shell 31, for example, it can be installed on the second wall portion 311 by a fastener. The second shell 31 can be fixedly installed on other components by a fastener (an example of the second fastener, not shown in the figure), and the fastener can fix the second shell 31 in an installation direction perpendicular to the thickness direction T (an example of the second installation direction, that is, the direction in which the fastener applies force to the second shell 31). The power electronic integrated module can be accommodated in the second shell 31, and the other end of the second cable 13 can be electrically connected to the power electronic integrated module.

[0035] It is understood that the coaxial arrangement of the first window 21a and the second window 31a in the present application means that the first window 21a and the second window 31a are expected to be coaxially arranged in design. Due to production errors and / or assembly errors, the first window 21a and the second window 31a may not be strictly or 100% coaxial. The coaxial arrangement of the first window 21a and the second window 31a in the present application means a coaxial arrangement that accommodates such errors or coaxiality deviations.

[0036] Reference Figure 4 The seal 16 is used to form a first sealing interface S1 and a second sealing interface S2. Specifically, the outer peripheral surface of the seal 16 can abut against the inner peripheral surface of the first window 21a, and the interface between the outer peripheral surface of the seal 16 and the inner peripheral surface of the first window 21a can form the first sealing interface S1. Figures 2 to 4 The upper end surface of the sealing member 16 can press against the outer wall surface of the second wall portion 311 at the step portion 312, and the small diameter end surface of the sealing member 16 ( Figures 2 to 4 The interface between the upper end surface of the second wall 311 and the step portion 312 (the outer wall surface of the second wall portion 311) can form a second sealing interface S2. By screwing the nut 17, the nut 17 can press the seal 16 along the thickness direction T, so that the outer peripheral surface of the seal 16 and the inner peripheral surface of the first window 21a are pressed against each other, and at the same time, the small diameter end surface ( Figures 2 to 4The upper end surface in the middle) and the step portion 311 are pressed against each other. Under the sealing of the first sealing interface S1, water or dust outside the first shell 21 and the second shell 31 will not enter the first shell 21 through the gap between the walls, and the cooling oil in the first shell 21 will not enter the second shell 31 through the first window 21a and the second window 31a. Under the sealing of the second sealing interface S2, water or dust outside the first shell 21 and the second shell 31 will not enter the second shell 31 through the gap between the walls.

[0037] It can be understood that the pressure of the nut 17 on the seal 16 is variable. By adjusting the pressure of the nut 17 on the seal 16, the pressure at the first sealing interface S1 and the second sealing interface S2 can be changed accordingly. In addition, under the pressure of the nut 17, the seal 16 can produce elastic deformation, so that the seal 16 can fully contact the inner circumference of the first window 21a and the step portion 311, thereby obtaining a better sealing effect.

[0038] The sealed connection structure 1 of this embodiment has at least the following advantages.

[0039] The sealing connection structure 1 has high reliability. Specifically, the sealing member 16 is insensitive to the relative positional relationship between the first window 21a and the second window 31a. Even if there is a large error in the coaxiality of the first window 21a and the second window 31a, as long as the step portion 311 still exists throughout the entire circumference, the second sealing interface S2 can be effectively formed.

[0040] The sealing connection structure 1 is easy to use. Specifically, the sealing member 16 can simultaneously form the first sealing interface S1 and the second sealing interface S2, so that the sealing requirements of the first shell 21 and the second shell 31 are met. Compared with the prior art, the sealing connection structure 1 requires fewer sealing members, and the installation process of the sealing connection structure 1 is also relatively simple.

[0041] The use environment of the sealing connection structure 1 is not easily restricted. Specifically, the pressure required by the first sealing interface S1 and the second sealing interface S2 is provided by the nut 17. Compared with the prior art, the pressure at the sealing interface is provided by the components of the sealing connection structure 1 itself, which is independent of the connection method of the first shell 21 and the second shell 31, and is therefore not easily restricted by the first shell 21 and the second shell 31.

[0042] It can be understood that the first shell 21 and the second shell 31 can be considered as part of the sealing connection structure 1 of the present application.

[0043] It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art may make various modifications and changes to the above embodiments under the guidance of the present application without departing from the scope of the present application.

[0044] It should be understood that at least one of the first housing 21 and the second housing 31 may be made of metal or plastic. In the case where the housing is made of metal, the housing may be manufactured by casting or sheet metal processing.

[0045] It should be understood that the first connector 12 is not limited to being a female connector, and may be a male connector, for example. The second connector 14 is not limited to being a male connector, and may be a female connector, for example.

[0046] It should be understood that the outer wall surface of the first wall portion 211 is not limited to abutting against the outer wall surface of the second wall portion 311. For example, there may be a gap between the outer wall surface of the first wall portion 211 and the outer wall surface of the second wall portion 311 in the thickness direction T (in some cases, such a gap is caused by processing errors and assembly errors).

[0047] It should be understood that the second window 31 a is not limited to being cylindrical, for example, the second window 31 a may be in the shape of a cuboid or a cube.

[0048] It should be understood that the first cable 11 is not limited to being fixed to the sleeve 15, for example, the sleeve 15 can be slidably connected to the first cable 11. When the first cable 11 is fixed to the sleeve 15, the seal 16 can be inserted into the first window 21a while the first connector 12 is plugged into the second connector 14. When the first cable 11 is slidably connected to the sleeve 15, the above action can be completed in steps, and the seal 16 can slide relative to the first cable 11 to be inserted into the first window 21a.

[0049] Here, in an optional solution, the first cable 11 can be fixedly connected to the sleeve 15, and the sleeve 15 can be slidably connected to the seal 16. At this time, by tightening the nut 17 to move the nut 17 upward, the seal 16 can be pushed upward relative to the first cable 11 and the sleeve 15, so that the seal 16 can achieve reliable sealing.

[0050] It should be understood that the first connector 12 , the second cable 13 and the second connector 14 are not necessary. For example, the power control unit can be electrically connected to one end of the first cable 11 , and the rotary transformer 22 can be electrically connected to the power control unit only via the first cable 11 .

[0051] It should be understood that the first cable 11, the first connector 12 and the second cable 13 can also be fixedly connected to the first shell 21 and / or the second shell 31. For example, the first cable 11 can be fixedly connected to the first shell 21 by a clip or a cable tie, and the second cable 12 can be fixedly connected to the second shell 31 by a clip or a cable tie.

[0052] It should be understood that the first shell 21 and the second shell 31 are not limited to being installed in a direction perpendicular to the thickness direction T. For example, the first shell 21 and the second shell 31 can be installed in the thickness direction T to press against each other.

Claims

1. A sealed connection structure, characterized in that: include: A first shell (21), comprising a first wall portion (211), wherein the first wall portion (211) defines a first window (21a), wherein the first window (21a) penetrates the first wall portion (211) in a thickness direction (T) of the first wall portion (211), wherein the first window (21a) is truncated cone-shaped, wherein a central axis of the first window (21a) is parallel to the thickness direction (T), wherein a small-diameter end of the first window (21a) is located on an outer wall surface of the first wall portion (211), and a large-diameter end of the first window (21a) is located on an inner wall surface of the first wall portion (211); A second housing (31), comprising a second wall portion (311), wherein the first wall portion (211) and the second wall portion (311) have the same thickness direction (T), the second wall portion (311) defines a second window (31a), the second window (31a) penetrates the second wall portion (311) in the thickness direction (T), and the first window (21a) and the second window (31a) overlap each other in the thickness direction (T); cable; A sleeve (15), the sealing sleeve of which is arranged on the cable; a sealing member (16) inserted into the first window (21a), the sealing member (16) being in the shape of a truncated cone, and the sealing member (16) being sealingly sleeved on the sleeve (15); and A nut (17) is threadedly engaged with the sleeve (15), wherein The nut (17) is configured to press against the large diameter end face of the seal (16) so that the interface between the outer peripheral surface of the seal (16) and the inner peripheral surface of the first window (21a) forms a first sealing interface (S1), and the interface between the small diameter end face of the seal (16) and the outer wall surface of the second wall portion (311) forms a second sealing interface (S2), and the first sealing interface (S1) and the second sealing interface (S2) extend around the entire circumference of the seal (16).

2. The sealing connection structure according to claim 1, characterized in that: The second window (31a) is cylindrical, the central axis of the second window (31a) is parallel to the thickness direction (T), and the first window (21a) and the second window (31a) are coaxially arranged.

3. The sealing connection structure according to claim 2, characterized in that: The diameter of the second window (31a) is smaller than the diameter of the small diameter end of the first window (21a), and the outer wall surface of the first wall portion (211) abuts against the outer wall surface of the second wall portion (311), so that a part of the outer wall surface of the second wall portion (311) and the inner peripheral surface of the first window (21a) together form an annular step portion (312), and the small diameter end surface of the sealing member (16) presses against the outer wall surface of the second wall portion (311) at the step portion (312).

4. The sealed connection structure according to any one of claims 1 to 3, characterized in that: include: A first cable (11) as the cable; a first connector (12) electrically connected to one end of the first cable (11); a second cable (13); and A second connector (14) is electrically connected to one end of the second cable (13); the first connector (12) and the second connector (14) are detachably plugged into each other; the first cable (11) is electrically connected to the second cable (13) via the first connector (12) and the second connector (14).

5. The sealing connection structure according to claim 4, characterized in that: At least one of the first cable (11), the first connector (12), the second cable (13) and the second connector (14) is fixedly connected to the first shell (21) and / or the second shell (31).

6. The sealed connection structure according to any one of claims 1 to 3, characterized in that: Also includes a first fastener and a second fastener, The first fastener fixes the first shell (21) in a first installation direction, the first installation direction being perpendicular to the thickness direction (T), The second fastener fixes the second shell (31) in a second installation direction, and the second installation direction is perpendicular to the thickness direction (T).

7. The sealed connection structure according to any one of claims 1 to 3, characterized in that: The inner circumferential surface of the first window (21a) and the outer circumferential surface of the sealing member (16) have the same taper, and the first window (21a) and the sealing member (16) are interference fit.

8. The sealed connection structure according to any one of claims 1 to 3, characterized in that: The sealing member (16) is made of rubber, the sleeve (15) is made of metal, and the sealing member (16) and the sleeve (15) are bonded or interference-fitted.

9. The sealed connection structure according to any one of claims 1 to 3, characterized in that: The cable is connected to the sleeve (15) by bonding or sliding.

10. A vehicle driving system, characterized in that: include: The sealed connection structure (1) according to any one of claims 1 to 9; A power assembly (2), comprising a rotary transformer (22), wherein the rotary transformer (22) is accommodated in the first housing (21); as well as A control assembly (3) comprising a power electronic integrated module, wherein the power electronic integrated module is accommodated in the second housing (31), wherein The rotary transformer (22) is electrically connected to the power electronic integrated module via the cable.

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