Sealing structure, transmission, and vehicle

Abstract

The present application relates to a sealing structure, a transmission, and a vehicle. The sealing structure comprises a first housing (1), a controller (2), a second housing (3), an electric motor (4), and an electrical connector (5), wherein the electric motor (4) is located within a first cavity (101); the controller (2) is located within a second cavity (301); the first housing (1) is connected to the second housing (3); one end of a first through-hole (102) is arranged opposite one end of a second through-hole (302); the electrical connector (5) is electrically connected to the electric motor (4) and the controller (2), and the electrical connector (5) extends from the first cavity (101) through the first through-hole (102) and the second through-hole (302) and into the second cavity (301); the electrical connector (5) seals the first through-hole (102); and an annular first sealing surface is formed between the electrical connector (5) and the second housing (3), and the first sealing surface extends in the circumferential direction of the end of the second through-hole (302) that faces the first through-hole (102). The present application can improve the sealing performance of the electric motor and the controller.

Description

Sealing structure, transmission and automobile

[0001] This application claims priority to Chinese Patent Application No. 202410774692.9, filed on June 17, 2024, entitled "A Sealing Structure, Gearbox and Automobile", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of automotive sealing technology, and in particular to a sealing structure, a transmission, and an automobile. Background Technology

[0003] An automobile is a means of transportation that uses a power source to carry goods. With the development of technology, automobiles have begun to use electric motors as their power source.

[0004] A car consists of a motor and a controller. The controller can control the operating parameters of the motor so that the car's driving state can adapt to road conditions.

[0005] In related technologies, motors and controllers are typically located inside automobiles, requiring a certain level of sealing. The controller needs to have components leading out to connect to the motor for transmitting electrical signals, in order to control the motor's operating parameters. This makes the motor and controller susceptible to contamination by impurities. Summary of the Invention

[0006] In view of this, this application provides a sealing structure, a transmission, and an automobile to improve their sealing performance.

[0007] Specifically, the following technical solutions are included:

[0008] A first aspect of this application provides a sealing structure comprising a first housing, a controller, a second housing, a motor, and an electrical connector. The first housing has a first cavity and a first through hole, and the second housing has a second cavity and a second through hole.

[0009] The first housing is connected to the second housing.

[0010] One end of the first through hole is positioned opposite to one end of the second through hole.

[0011] The electrical connector electrically connects the motor and the controller, and the electrical connector extends from the first cavity through the first through hole and the second through hole into the second cavity.

[0012] The electrical connector seals the first through hole.

[0013] An annular first sealing surface is formed between the electrical connector and the second housing, and the first sealing surface extends circumferentially along one end of the second through hole toward the first through hole.

[0014] Optionally, the electrical connector abuts against the sidewall of the first through hole.

[0015] Optionally, the sealing structure includes an elastic element, which is sleeved on the outside of the electrical connector and abuts against the sidewalls of the electrical connector and the first through hole, respectively.

[0016] Optionally, the electrical connector includes a sealing portion, the orthographic projection of the second through hole onto the second projection plane is located within the orthographic projection of the sealing portion onto the second projection plane, the second projection plane is a plane perpendicular to the height direction of the second housing, the sealing portion abuts against the second housing and forms the first sealing surface.

[0017] Optionally, the sealing structure further includes a plurality of abutment members, which are circumferentially spaced along the second through hole. Each abutment member connects the sealing part and the second housing to generate pressure perpendicular to the first sealing surface in the sealing part.

[0018] Optionally, the sealing structure further includes a plurality of connectors, which are spaced apart circumferentially along the electrical connector. The connectors connect the first housing and the second housing to form a second sealing surface between the first housing and the second housing, and the second sealing surface extends circumferentially along the first sealing surface.

[0019] Optionally, the electrical connector includes a first connecting portion, a sealing portion, and a second connecting portion. The sealing portion connects the first connecting portion and the second connecting portion. The first connecting portion extends into the first cavity through the first through hole, and the second connecting portion extends into the second cavity through the second through hole. The sealing portion is located between the first housing and the second housing.

[0020] Optionally, the second housing has a third cavity that communicates with the second cavity, and the second through hole and the third cavity are located on adjacent sides of the second cavity, respectively.

[0021] A second aspect of this application provides a gearbox, the gearbox including the sealing structure described in the above technical solutions.

[0022] A third aspect of this application provides an automobile that includes a transmission as described in the above technical solutions.

[0023] The beneficial effects of the technical solution provided in this application include at least the following: A first housing can accommodate a motor, and a second housing can accommodate a motor. A first through-hole and a second through-hole are opposite each other, allowing a power connector to pass through and electrically connect the motor in the first cavity and the controller in the second cavity. The power connector seals the first through-hole, improving the sealing performance of the first cavity and reducing the possibility of contamination of the controller. The power connector, by forming a first annular sealing surface with the second housing, can seal the second through-hole, thereby improving the sealing performance of the second cavity. By forming a seal at the first and second through-holes, the power connector serves both the function of transmitting electrical signals and sealing, while also improving the ease of assembly of the sealing structure of this application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a full cross-sectional schematic diagram of a sealing structure provided in an embodiment of this application;

[0026] Figure 2 is a detailed schematic diagram of point A in Figure 1;

[0027] Figure 3 is a detailed schematic diagram of the removal of electrical connectors and some related structures at point A in Figure 1;

[0028] Figure 4 is a side view of a sealing structure provided in an embodiment of this application;

[0029] Figure 5 is a side view of a sealing structure provided in an embodiment of this application after the cover plate has been removed.

[0030] The reference numerals in the figure represent the following: 1. First housing; 101. First cavity; 102. First through hole; 103. Opening; 2. Controller; 3. Second housing; 301. Second cavity; 302. Second through hole; 303. Third cavity; 4. Motor; 5. Electrical connector; 51. Sealing part; 52. First connecting part; 53. Second connecting part; 6. Elastic element; 7. Abutting part; 8. Connecting part; 9. Cover plate.

[0031] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0033] The directional terms used in the embodiments of this application, such as "up," "down," and "side," are generally based on the relative positions shown in Figure 1. These directional terms are used merely to more clearly describe the relationships between structures, not to describe absolute positions. When the product is placed in different orientations, the positions may change; for example, "up" and "down" may be interchanged.

[0034] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0035] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0036] The first aspect of this application provides a sealing structure, as shown in Figures 1, 2, and 3. The sealing structure includes a first housing 1, a controller 2, a second housing 3, a motor 4, and an electrical connector 5. The first housing 1 has a first cavity 101 and a first through hole 102, and the second housing 3 has a second cavity 301 and a second through hole 302.

[0037] The first housing 1 is connected to the second housing 3.

[0038] One end of the first through hole 102 is positioned opposite to one end of the second through hole 302.

[0039] Electrical connector 5 electrically connects motor 4 and controller 2. Electrical connector 5 extends from first cavity 101 through first through hole 102 and second through hole 302 into second cavity 301.

[0040] Electrical connector 5 seals the first through hole 102.

[0041] An annular first sealing surface is formed between the electrical connector 5 and the second housing 3. The first sealing surface extends circumferentially along the second through hole 302 toward one end of the first through hole 102.

[0042] It is understood that the first housing 1 can accommodate the motor 4, and the second housing 3 can also accommodate the motor 4. The first through hole 102 and the second through hole 302 are opposite each other, allowing the power connector 5 to pass through and electrically connect the motor 4 in the first cavity 101 and the controller 2 in the second cavity 301. The power connector 5 seals the first through hole 102, improving the sealing performance of the first cavity 101 and reducing the possibility of contamination of the controller 2. The power connector 5, by forming an annular first sealing surface with the second housing 3, can seal the second through hole 302, thereby improving the sealing performance of the second cavity 301. By forming a seal at the first through hole 102 and the second through hole 302, the power connector 5 serves both the function of transmitting electrical signals and sealing, while also improving the assembly convenience of the sealing structure of this application.

[0043] In related technologies, due to the sealing requirements of motor 4 and controller 2, the location of electrical connector 5 needs to be sealed when it passes through the cavity where motor 4 is located and the cavity where controller 2 is located. This increases the assembly cost and time of the sealing structure.

[0044] In this embodiment, by forming a seal at the first through hole 102 and the second through hole 302, the electrical connector 5 serves both as a transmitter of electrical signals and a seal, while also improving the assembly convenience of the sealing structure. Specifically, during assembly, the electrical connector 5 can first connect to the second housing 3 to form a first sealing surface. Since the first through hole 102 and the second through hole 302 are opposite each other, the electrical connector 5 will simultaneously penetrate into the first through hole 102 when assembling the first housing 1 and the second housing 3, thus facilitating the sealing of the first through hole 102 by the electrical connector 5. Therefore, the way the electrical connector 5 seals the first through hole 102 and the second through hole 302 can be adapted to the assembly process of the sealing structure of this application. That is, the first through hole 102 and the second through hole 302 can be sealed simultaneously with the assembly of the electrical connector 5 and the second housing 3, as well as the assembly of the first housing 1 and the second housing 3, thereby improving assembly efficiency.

[0045] In this embodiment, the electrical connector 5 seals the first through hole 102, which improves the sealing performance of the first cavity 101 and reduces the possibility of contamination of the controller 2. The electrical connector 5 can seal the first through hole 102 through its own structural characteristics, or it can be sealed using other sealing elements. The electrical connector 5 can completely fill the first through hole 102 to achieve a seal, or it can block a certain cross-section of the first through hole 102, preventing the first cavity 101 from communicating with the outside through the first through hole 102, thereby achieving a seal.

[0046] In this embodiment, the electrical connector 5, by forming an annular first sealing surface with the second housing 3, can seal the second through hole 302 and maintain the sealing effect on the first through hole 102. It is understood that the first through hole 102 and the second through hole 302 are arranged opposite each other. When the electrical connector 5 and the second housing 3 form an annular first sealing surface, the electrical connector 5 can be supported by the second housing 3. This support can improve the stability of the electrical connector 5 when it extends into the first through hole 102, and also keep the electrical connector 5 within the first through hole 102, maintaining the sealing effect of the electrical connector 5 on the first through hole 102. The annular first sealing surface extends circumferentially along the second through hole 302, preventing impurities from entering the second through hole 302 through the location of the first sealing surface, thus achieving a sealing effect on the second through hole 302. The electrical connector 5 can form the annular first sealing surface by applying pressure to the second housing 3, or by forming the annular first sealing surface integrally with the second housing 3.

[0047] In this embodiment, the first housing 1 and the second housing 3 are connected. The first housing 1 and the second housing 3 can be connected in a detachable manner, such as by bolts, or in a non-detachable manner.

[0048] In this embodiment, one end of the first through hole 102 is positioned opposite to one end of the second through hole 302. This opposing arrangement of the first through hole 102 and the second through hole 302 facilitates the direct passage of the electrical connector 5, shortening the length of its electrical connection between the motor 4 and the controller 2. Furthermore, this arrangement also allows for the electrical connector 5 to be inserted into the first through hole 102 during the assembly of the first housing 1 and the second housing 3, achieving a seal on the first through hole 102.

[0049] Wherein, when both the first through hole 102 and the second through hole 302 extend along a straight line, the fact that one end of the first through hole 102 and one end of the second through hole 302 are opposite each other can mean that the extension direction of the first through hole 102 is parallel to or coincides with the extension direction of the second through hole 302; when both the first through hole 102 and the second through hole 302 extend along a curve, the fact that one end of the first through hole 102 and one end of the second through hole 302 are opposite each other can mean that the tangent of one end of the first through hole 102 is parallel to or coincides with the tangent of one end of the second through hole 302; when ... extension direction of the first through hole 102 is parallel to or coincides with the tangent of one end of the second through hole 302; when the first through hole 102 and the second through hole 302 extend along a curve, the fact that one end of the first through hole 102 and one end of the second through hole 302 extend along a curve can mean that the extension direction of the first through hole 102 is parallel to or coincides with the tangent of one end of the second through hole 302; when the first through hole 102 and the second through hole 302 extend along a curve, the extension direction of the first through hole 102 is parallel to or coincides When the first through hole 102 extends along a straight line and the second through hole 302 extends along a curve, the fact that one end of the first through hole 102 and one end of the second through hole 302 are positioned opposite each other can mean that the extension direction of the first through hole 102 is parallel to or coincides with the tangent of one end of the second through hole 302; when the second through hole 302 extends along a straight line and the first through hole 102 extends along a curve, the fact that one end of the second through hole 302 and one end of the first through hole 102 are positioned opposite each other can mean that the extension direction of the second through hole 302 is parallel to or coincides with the tangent of one end of the first through hole 102.

[0050] In this embodiment, the electrical connector 5 electrically connects the motor 4 and the controller 2. The electrical connector 5 extends from the first cavity 101 through the first through hole 102 and the second through hole 302 into the second cavity 301. The portion of the electrical connector 5 located in the first cavity 101 has its orthographic projection on the first projection plane located within the orthographic projection of the first through hole 102 on the first projection plane. This facilitates the electrical connector 5 passing through the first through hole 102 into the first cavity 101 during the assembly of the first housing 1 and the second housing 3. The first projection plane is a plane perpendicular to the height direction of the first housing 1.

[0051] In this embodiment of the application, the controller 2 can be an MCU (Motor Control Unit), which can control parameters such as the speed of the motor 4 through the electrical connector 5.

[0052] In the embodiments of this application, the material for the electrical connection can be a conductive metal such as copper, or an alloy containing a conductive metal such as copper.

[0053] In this embodiment, the cross-sectional shape of the first through hole 102 can be rectangular, so that it can match the shape of the electrical connector 5, through which the power supply connector 5 passes.

[0054] In this embodiment, the cross-sectional shape of the second through hole 302 can be rectangular, so that it can match the shape of the electrical connector 5, through which the power supply connector 5 passes.

[0055] In some embodiments of this application, the electrical connector 5 abuts against the sidewall of the first through hole 102.

[0056] It is understandable that by abutting against the sidewall of the first through hole 102, the electrical connector 5 can generate pressure. The direction of the pressure is perpendicular to the sidewall of the first through hole 102. When the electrical connector 5 has a tendency to move relative to the first through hole 102, this pressure can generate friction, thereby restricting the movement of the electrical connector 5 relative to the first through hole 102, thus improving the sealing stability of the electrical connector 5.

[0057] In this embodiment, the electrical connector 5 can deform within the first through hole 102 by its own structural characteristics, thereby generating pressure that abuts against the side wall of the first through hole 102; the electrical connector 5 can also generate pressure that abuts against the side wall of the first through hole 102 by cooperating with other sealing elements.

[0058] In some embodiments of this application, the sealing structure includes an elastic element 6, which is sleeved on the outside of the electrical connector 5 and abuts against the sidewalls of the electrical connector 5 and the first through hole 102, respectively.

[0059] Understandably, the elastic element 6 can deform to abut against the sidewalls of the electrical connector 5 and the first through hole 102, thus achieving contact between the electrical connector 5 and the sidewalls of the first through hole 102. Simultaneously, the elastic element 6 also helps to increase the coefficient of friction between the electrical connector 5 and the sidewalls of the first through hole 102, thereby improving the stability of the electrical connector 5 within the first through hole 102.

[0060] Secondly, during the assembly of the first housing 1 and the second housing 3, since the first through hole 102 and the second through hole 302 are arranged opposite to each other, when the electrical connector 5 extends into the first through hole 102, the elastic member 6 can be simultaneously compressed and enter into the first through hole 102, abutting against the side wall of the electrical connector 5 and the first through hole 102 respectively. Through the relative movement of the first housing 1 and the second housing 3 during assembly, the elastic member 6 and the electrical connector 5 can simultaneously seal the first through hole 102, thus improving assembly efficiency.

[0061] In this embodiment, the elastic element 6 can be a sealing ring.

[0062] In this embodiment, the material of the elastic element 6 can be rubber.

[0063] In some embodiments of this application, the electrical connector 5 includes a sealing portion 51, the second through hole 302 is projected onto the second projection plane and the second projection plane is a plane perpendicular to the height direction of the second housing 3, the sealing portion 51 abuts against the second housing 3 and forms a first sealing surface.

[0064] It is understandable that the orthographic projection of the second through hole 302 onto the second projection plane lies within the orthographic projection of the sealing part 51 onto the second projection plane, thus forming an annular first sealing surface at one end of the second through hole 302. Furthermore, not only can the sealing effect of the first sealing surface be improved by applying pressure to the sealing part 51, but the sealing part 51 also provides support for the portion of the electrical connector 5 located in the first through hole 102 and the portion located in the first cavity 101, thereby improving the stability of the electrical connector 5 when the first housing 1 and the second housing 3 are assembled.

[0065] In this embodiment, the annular first sealing surface can refer to the side of the sealing part 51 that contacts the second housing 3 and the side of the second housing 3 that contacts the sealing part 51. The side of the sealing part 51 that contacts the second housing 3 and the side of the second housing 3 that contacts the sealing part 51 form an abutment to seal one end of the second through hole 302. A sealing element can also be filled between the side of the sealing part 51 that contacts the second housing 3 and the side of the second housing 3 that contacts the sealing part 51 to improve its sealing performance.

[0066] In this embodiment, the sealing part 51 and the second housing 3 can be connected by welding, bolts or other means to achieve abutment.

[0067] In some embodiments of this application, the sealing structure further includes a plurality of abutment members 7, which are circumferentially spaced along the second through hole 302. Each abutment member 7 is connected to the sealing part 51 and the second housing 3, so that the sealing part 51 generates pressure perpendicular to the first sealing surface.

[0068] Understandably, the abutment 7 generates pressure perpendicular to the first sealing surface. This pressure improves the tightness of the contact between the sealing part 51 and the second housing 3. The tightly contacting sealing part 51 and the second housing 3 form the first sealing surface, which improves the sealing effect and reduces the possibility of impurities entering the second cavity 301 through the second through hole 302. The multiple abutment members 7 are spaced apart circumferentially along the second through hole 302, allowing the pressure generated by the abutment members 7 to be distributed circumferentially around the second through hole 302. This improves the sealing performance at multiple locations on the first sealing surface, thereby enhancing its sealing effect.

[0069] In this embodiment, the sealing part 51 has a through hole, the second housing 3 has a threaded hole, and the abutment 7 is threadedly connected to the threaded hole through the through hole. The pressure generated by the threaded connection presses the sealing part 51 against the second housing 3, thereby achieving a seal.

[0070] In this embodiment, the abutting member 7 can abut against the second housing 3 by means of welding or other methods.

[0071] In this embodiment of the application, the first housing 1 is located above the second housing 3, and the sealing part 51 is located between the first housing 1 and the second housing 3.

[0072] In some embodiments of this application, the sealing structure further includes a plurality of connectors 8, which are spaced apart circumferentially along the electrical connector 5. The connectors 8 connect the first housing 1 and the second housing 3 to form a second sealing surface between the first housing 1 and the second housing 3. The second sealing surface extends circumferentially along the first sealing surface.

[0073] Understandably, the connector 8 can connect the first housing 1 and the second housing 3, which facilitates the assembly of the first housing 1 and the second housing 3. The second sealing surface extends circumferentially along the first sealing surface, which helps to achieve the sealing effect of the sealing part 51 of the electrical connector 5 located between the first housing 1 and the second housing 3, and reduces the possibility of the sealing part 51 being contaminated and causing performance degradation.

[0074] In some embodiments of this application, the electrical connector 5 includes a first connecting portion 52 and a second connecting portion 53, and a sealing portion 51 connects the first connecting portion 52 and the second connecting portion 53. The first connecting portion 52 extends into the first cavity 101 through the first through hole 102, and the second connecting portion 53 extends into the second cavity 301 through the second through hole 302. The sealing portion 51 is located between the first housing 1 and the second housing 3.

[0075] Understandably, the first connecting part 52 can achieve an electrical connection with the controller 2, and the second connecting part 53 can achieve an electrical connection with the motor 4. The first connecting part 52 can transmit an electrical signal to the second connecting part 53 through the sealing part 51, thus enabling the controller 2 to control the motor 4.

[0076] In this embodiment of the application, the second connecting part 53 and the motor 4 can be connected by bolts to achieve electrical connection.

[0077] In this embodiment of the application, as shown in Figures 4 and 5, the first housing 1 has an opening 103, and the sealing structure includes a cover plate 9. The opening 103 is located on the adjacent side of the first through hole 102. The orthographic projection of the opening 103 onto the third projection plane partially coincides with the orthographic projection of the first connecting part 52 onto the third projection plane. The third projection plane is a projection plane perpendicular to the width direction of the first housing 1. The cover plate 9 seals the opening 103. This facilitates the assembly personnel in connecting the first connecting part 52 and the controller 2 through the opening 103.

[0078] Optionally, the first connecting part 52 and the controller 2 can be connected by bolts.

[0079] Optionally, the cover plate 9 and the first housing 1 can be connected by bolts, so that the cover plate 9 can seal the opening 103.

[0080] In this embodiment, a clearance fit can be formed between the second connecting part 53 and the second through hole 302, which is beneficial for the electrical connector 5 to be assembled on the second housing 3.

[0081] In the embodiments of this application, the number of first connecting parts 52 can be 2, 3 or 4, or other numbers, and each first connecting part 52 can function as a transmitter of electrical signals.

[0082] In the embodiments of this application, the number of second connecting parts 53 can be 2, 3 or 4, or other numbers, and each second connecting part 53 serves to transmit electrical signals.

[0083] In some embodiments of this application, the second housing 3 has a third cavity 303, which communicates with the second cavity 301, and the second through hole 302 and the third cavity 303 are located on adjacent sides of the second cavity 301, respectively.

[0084] Understandably, motor 4 is used to drive the transmission mechanism to transmit power. The third cavity 303 is connected to the second cavity 301, which facilitates the placement of the transmission mechanism within the third cavity 303 and its connection to motor 4. The second through hole 302 and the third cavity 303 are located on adjacent sides of the second cavity 301, which helps to reduce interference between the electrical connector 5 and the transmission mechanism during assembly.

[0085] A second aspect of this application provides a gearbox, which includes a sealing structure as described in the above embodiments.

[0086] It is understood that, due to the sealing structure of the above embodiments, the gearbox of this application has the same technical effects as the above embodiments, and will not be described again here.

[0087] A third aspect of this application provides an automobile that includes a transmission as described in the above embodiments.

[0088] It is understood that, due to the use of the gearbox in the above embodiments, the automobile of this application has the same technical effects as the above embodiments, and will not be described again here.

[0089] In the embodiments of this application, the vehicle can be a pure electric vehicle or a hybrid vehicle.

[0090] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0091] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sealing structure, wherein, The sealing structure includes a first housing (1), a controller (2), a second housing (3), a motor (4), and an electrical connector (5). The first housing (1) has a first cavity (101) and a first through hole (102), and the second housing (3) has a second cavity (301) and a second through hole (302). The motor (4) is located inside the first cavity (101); The controller (2) is located inside the second cavity (301); The first housing (1) is connected to the second housing (3); One end of the first through hole (102) is disposed opposite to one end of the second through hole (302); The electrical connector (5) is electrically connected to the motor (4) and the controller (2). The electrical connector (5) extends from the first cavity (101) through the first through hole (102) and the second through hole (302) into the second cavity (301). The electrical connector (5) seals the first through hole (102); An annular first sealing surface is formed between the electrical connector (5) and the second housing (3), and the first sealing surface extends circumferentially along the second through hole (302) toward one end of the first through hole (102).

2. The sealing structure according to claim 1, wherein, The electrical connector (5) abuts against the side wall of the first through hole (102).

3. The sealing structure according to claim 2, wherein, The sealing structure includes an elastic element (6), which is sleeved on the outside of the electrical connector (5) and abuts against the sidewalls of the electrical connector (5) and the first through hole (102).

4. The sealing structure according to any one of claims 1 to 3, wherein, The electrical connector (5) includes a sealing part (51), the second through hole (302) is projected onto the second projection plane and is located within the projection of the sealing part (51) onto the second projection plane. The second projection plane is a plane perpendicular to the height direction of the second housing (3). The sealing part (51) abuts against the second housing (3) and forms the first sealing surface.

5. The sealing structure according to claim 4, wherein, The sealing structure further includes a plurality of abutment members (7), which are spaced apart circumferentially along the second through hole (302). Each abutment member (7) connects the sealing part (51) and the second housing (3) to generate pressure perpendicular to the first sealing surface in the sealing part (51).

6. The sealing structure according to claim 5, wherein, The sealing structure further includes a plurality of connectors (8), which are spaced apart circumferentially along the electrical connector (5). The connectors (8) connect the first housing (1) and the second housing (3) to form a second sealing surface between the first housing (1) and the second housing (3), and the second sealing surface extends circumferentially along the first sealing surface.

7. The sealing structure according to claim 4, wherein, The electrical connector (5) includes a first connecting part (52) and a second connecting part (53). The sealing part (51) connects the first connecting part (52) and the second connecting part (53). The first connecting part (52) extends into the first cavity (101) through the first through hole (102). The second connecting part (53) extends into the second cavity (301) through the second through hole (302). The sealing part (51) is located between the first housing (1) and the second housing (3).

8. The sealing structure according to claim 1, wherein, The second housing (3) has a third cavity (303) that communicates with the second cavity (301), and the second through hole (302) and the third cavity (303) are located on adjacent sides of the second cavity (301).

9. A gearbox, wherein, The gearbox includes a sealing structure as described in any one of claims 1 to 8.

10. A type of automobile, wherein, The vehicle includes the gearbox as described in claim 9.

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