Sealing structure, trailer towing device and vehicle

Abstract

The application relates to the technical field of vehicle chassis, and provides a sealing structure, a trailer traction device and a vehicle. The sealing structure is used for the trailer traction device, and comprises a connecting plate and a sealing shell located at one side of the connecting plate, and a driving mechanism for accommodating a trailer hook is arranged in the sealing shell. The sealing shell comprises a first shell and a second shell which are detachably connected, the first shell is connected to the connecting plate through a plurality of first connecting pieces, and a first sealing ring is arranged between the first shell and the connecting plate. The plurality of first connecting pieces also comprise internal connecting pieces arranged in the sealing shell and external connecting pieces arranged outside the sealing shell, the internal connecting pieces are located on the inner side of the first sealing ring, and the external connecting pieces are located on the outer side of the first sealing ring. The application can avoid the large size of the shell of the trailer traction device, can reduce the space occupation, is helpful for the arrangement of the trailer traction device, and is also favorable for realizing the lightweight design of the trailer traction device.

Description

Technical Field

[0001] This application relates to the field of vehicle chassis technology, and in particular to a sealing structure, a trailer towing device, and a vehicle. Background Technology

[0002] In fully automatic trailer towing devices, to prevent the motor and corresponding transmission control structure from being damaged by collisions or from being dirty with mud and water, which would affect the normal use of the device, the drive mechanism of the trailer hook is generally housed and sealed in a housing, and the housing is fixed to a connecting plate connected to the frame or body by bolts.

[0003] Currently, bolts used to connect the housing and the connecting plate are usually arranged along the outer edge of the housing. Although this can achieve reliable fixing between the housing and the connecting plate, it also has disadvantages such as the large size of the housing, which is not conducive to the arrangement, and it is not conducive to achieving lightweight design, which is not conducive to improving the overall quality of the trailer towing device. Utility Model Content

[0004] In view of this, this application aims to propose a sealing structure to improve the overall quality of trailer towing devices.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A sealing structure for a trailer towing device, comprising a connecting plate and a sealing shell located on one side of the connecting plate, the sealing shell being used to accommodate a drive mechanism for a trailer hook. The sealing shell includes a first shell and a second shell that are detachably connected. The first shell is connected to the connecting plate by a plurality of first connectors, and a first sealing ring is provided between the first shell and the connecting plate. The plurality of first connectors include an internal connector installed within the sealing housing and an external connector installed outside the sealing housing, wherein the internal connector is located inside the first sealing ring and the external connector is located outside the first sealing ring.

[0006] Furthermore, the first housing is provided with a mounting groove, and the first sealing ring is disposed in the mounting groove; The mounting groove has a rectangular cross-section, and the cross-section of the first sealing ring is matched with the mounting groove.

[0007] Furthermore, the inner and / or outer walls of the first sealing ring are provided with abutment protrusions; The abutting protrusions are a plurality of those arranged at intervals along the circumference of the first sealing ring, and the abutting protrusions are interference fit with the wall of the mounting groove.

[0008] Furthermore, the end of the first sealing ring that abuts against the connecting plate is provided with a sealing protrusion; The sealing protrusion is a ring arranged around the circumference of the first sealing ring, and the sealing protrusion includes an inner protrusion arranged near the inner side of the first sealing ring and an outer protrusion arranged near the outer side of the first sealing ring.

[0009] Furthermore, each of the first connecting members is made of bolts; Each of the first connectors passes through a first connection hole on the first housing and is connected to a first threaded hole on the connecting plate, and the first connection hole is formed by a steel sleeve embedded in the first housing.

[0010] Furthermore, the outer peripheral wall of the steel sleeve is provided with a groove, and a portion of the first housing is embedded in the groove.

[0011] Furthermore, the first housing and the second housing are connected together by a plurality of second connectors, and a second sealing ring is provided between the first housing and the second housing; Each of the second connectors is located on the same side of the second sealing ring.

[0012] Furthermore, the internal connector is disposed near the top of the first housing; and / or, At least one of the first housing and the second housing has an anti-collision structure on its outer wall, the anti-collision structure including multiple protruding ribs arranged side by side.

[0013] Compared with related technologies, this application has the following advantages: (1) The sealing structure described in this application makes the first connecting member for connecting the sealing shell and the connecting plate include an internal connecting member and an external connecting member. The internal connecting member is installed inside the sealing shell and is located inside the first sealing ring. By designing part of the first connecting member inside the sealing shell, it is possible to avoid the first connecting member being arranged entirely along the outer edge of the sealing shell, which would result in a large size and space occupation of the sealing shell, affecting its arrangement and making it difficult to achieve lightweight design, thus improving the overall quality of the trailer towing device.

[0014] (2) An installation groove is provided on the first housing so that the first sealing ring is located in the installation groove. The cross-section of the installation groove is rectangular, and the cross-section of the first sealing ring matches the installation groove. This not only facilitates the installation of the first sealing ring between the first housing and the connecting plate, but also helps to improve the ease of installation of the first sealing ring. It also ensures the stability of the first sealing ring after installation between the first housing and the connecting plate, thus ensuring its sealing effect.

[0015] (3) By providing abutting protrusions on the inner and outer walls of the first sealing ring, and making the abutting protrusions interference fit with the groove wall of the mounting groove, the first sealing ring can be prevented from falling out of the mounting groove during transportation or assembly after it is placed in the mounting groove, which can further improve the convenience of installing the first sealing ring.

[0016] (4) An inner protrusion and an outer protrusion are provided at the end where the first sealing ring abuts against the connecting plate. A double sealing structure can be formed between the first sealing ring and the connecting plate. When the outer protrusion fails, the inner protrusion can also be used to block it, thus achieving a double seal and a higher sealing level.

[0017] (5) The first connecting part is made of bolts, which is simple in structure, low in cost, easy to connect and operate, and can ensure the stability of the connection. At the same time, by setting a steel sleeve in the first housing, the first connecting hole is formed by the steel sleeve. The steel sleeve can also bear the tightening torque of the bolt, preventing the first sealing ring from losing its clamping force due to the deformation of the first housing and causing sealing failure.

[0018] (6) A groove is provided on the outer peripheral wall of the steel sleeve, and a portion of the first housing is embedded in the groove, which can ensure the stability of the steel sleeve embedded in the first housing and help ensure the stability of the connection and sealing between the first housing and the connecting plate.

[0019] (7) The first housing and the second housing are connected by the second connector, and a second sealing ring is provided between the first housing and the second housing, and each of the second connectors is located on the same side of the second sealing ring, which facilitates the connection design between the first housing and the second housing, and also helps to reduce the design and manufacturing cost of the connection structure between the first housing and the second housing.

[0020] (8) The internal connecting parts are arranged close to the top of the first housing. This can take advantage of the fact that the top of the sealing housing is generally close to the surrounding parts, thus avoiding the inconvenience of arrangement caused by the large size and space occupied by the top of the sealing housing, which may easily interfere with the surrounding parts.

[0021] By setting anti-collision structures on the outer walls of the first and second shells, and making the anti-collision structures use multiple raised ribs arranged side by side, not only can the raised ribs contact the barrier first when the sealing shell collides with the external barrier, thus preventing the barrier from directly impacting the sealing shell wall and causing damage to the sealing shell, but also the simple structure and easy molding of the raised ribs can facilitate the design and fabrication of the anti-collision structure, thus avoiding high manufacturing costs for the sealing shell.

[0022] Another object of this application is to provide a trailer towing device having the sealing structure described above.

[0023] In addition, this application also proposes a vehicle equipped with the trailer towing device described above.

[0024] The trailer towing device described in this application, and the vehicle equipped with the trailer towing device, have the same beneficial effects over the prior art as the sealing structure described above, and will not be repeated here. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the sealing structure in the trailer traction device described in the embodiments of this application; Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective; Figure 3 for Figure 1 Exploded view of the structure shown; Figure 4 This is a schematic diagram illustrating the arrangement of the first sealing ring and the first connecting member as described in an embodiment of this application; Figure 5 This is a schematic diagram of the connecting plate described in an embodiment of this application; Figure 6 This is a schematic diagram showing the arrangement of the internal connectors inside the sealed housing according to an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the first housing described in an embodiment of this application; Figure 8 for Figure 7 A magnified view of a portion of the image; Figure 9 This is a schematic diagram of the structure of the first sealing ring described in an embodiment of this application; Figure 10 for Figure 9 A magnified view of a portion of the image; Figure 11 This is a cross-sectional schematic diagram of the first sealing ring described in an embodiment of this application; Figure 12 This is a schematic diagram of the steel sleeve structure described in an embodiment of this application; Figure 13 This is a schematic diagram of the anti-collision structure described in the embodiments of this application; Figure 14 This is a schematic diagram of the structure of the second housing described in an embodiment of this application; Explanation of reference numerals in the attached figures: 1. Connecting plate; 2. Sealing shell; 3. Trailer hook; 4. First connecting piece; 5. First sealing ring; 6. Steel sleeve; 7. Second connecting piece; 8. Second sealing ring; 101. First threaded hole; 21. First housing; 22. Second housing; 2a. Raised rib; 201. First connecting through hole; 202. Second threaded hole; 203. Mounting groove; 204. Second connecting through hole; 31. Shaft; 41. Internal connector; 42. External connector; 501. Abutting protrusion; 502. Sealing protrusion; 5021. Inner protrusion; 5022. Outer protrusion; 601. Groove; Q. Capacity space. Detailed Implementation

[0026] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0030] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0032] An embodiment of the first aspect of this application provides a sealing structure for a trailer towing device, and the sealing structure, through its innovative design in connection and sealing, helps to improve the overall quality of the trailer towing device.

[0033] In related technologies, trailer towing devices are generally located at the rear of vehicles and are important components for expanding the vehicle's carrying capacity. Among them, fully automatic trailer towing devices that drive the trailer hook 2 with a motor and require no manual operation are becoming increasingly popular.

[0034] In fully automatic trailer towing devices, to prevent the drive mechanism of the trailer hook 2, i.e., the motor and corresponding transmission control structure, from being damaged by collisions or contaminated by mud or water, thus affecting the normal operation of the trailer towing device, the drive mechanism of the trailer hook 2 is generally housed and sealed in a housing for a sealed design. The housing is then bolted to the connecting plate 1, which is connected to the vehicle frame or body.

[0035] Currently, in fully automatic trailer towing devices, the bolts used to connect the housing and connecting plate 1 are typically arranged along the outer edge of the housing. While this method ensures reliable fixing between the housing and connecting plate 1, it often requires the formation of protruding platforms or connecting lugs at the edge of the housing to meet the bolt placement requirements. This tends to result in a larger housing size, which is not conducive to its arrangement, nor to achieving a lightweight design for the trailer towing device, and ultimately hinders the improvement of the overall quality of the trailer towing device.

[0036] In view of this, in order to overcome the shortcomings of related technologies, in the sealing structure of this embodiment, by Figures 1 to 4 and combined Figure 6 As shown, the overall design includes a connecting plate 1 and a sealing shell 2 located on one side of the connecting plate 1.

[0037] The sealing shell 2 houses the drive mechanism of the trailer hook 3, and the sealing shell 2 includes a first shell 21 and a second shell 22 that are detachably connected. The first shell 21 is connected to the connecting plate 1 by a plurality of first connectors 4, and a first sealing ring 5 is provided between the first shell 21 and the connecting plate 1.

[0038] Meanwhile, the aforementioned plurality of first connectors 4 also include an internal connector 41 installed inside the sealing shell 2 and an external connector 42 installed outside the sealing shell 2, wherein the internal connector 41 is located inside the first sealing ring 5 and the external connector 42 is located outside the first sealing ring 5.

[0039] Therefore, by using the first connector 4 connecting the sealing shell 2 and the connecting plate 1, which includes an internal connector 41 and an external connector 42, the internal connector 41 is installed inside the sealing shell 2 and is located inside the first sealing ring 5. In this embodiment, by designing part of the first connector 4 inside the sealing shell 2, the first connector 4 is avoided from being arranged entirely along the outer edge of the sealing shell 2, which would result in a large size and space occupation of the sealing shell 2, affecting its arrangement and hindering the realization of the overall lightweight design of the device, thereby improving the overall quality of the trailer towing device.

[0040] Furthermore, based on the internal connector 41 being installed inside the sealing shell 2, by positioning the internal connector 41 inside the first sealing ring 5, it is clear that it can also adapt to the design method of installing the internal connector 41 inside the sealing shell 2, thereby achieving sealing at the location of the internal connector 41, ensuring the sealing effect between the sealing shell 2 and the connecting plate 1, meeting the dustproof and waterproof requirements of the trailer's missing device, and thus also helping to improve the overall quality of the trailer towing device.

[0041] Based on the above overall introduction, specifically, the drive mechanism for accommodating the trailer hook 3 within the sealed housing 2 described above, that is, it still... Figure 4 As shown, a receiving space Q is formed in the sealed shell 2, which is jointly formed by the first shell 21 and the second shell 22, and the drive mechanism for driving the trailer hook 3 is disposed in the receiving space Q.

[0042] And then combine Figure 5 As shown, the trailer hook 3 is generally rotatably mounted on the connecting plate 1 via a rotating shaft 31. The drive mechanism for the trailer hook 3 can be found in the relevant structure of existing fully automatic trailer towing devices, and it typically includes a motor, a transmission mechanism that enables the motor to drive the rotating shaft 31, and a locking mechanism for locking the trailer hook 3 in a set position (such as an extended position and a retracted position).

[0043] Furthermore, it is worth noting that the connecting plate 1 serves as the foundation for the entire trailer towing device. In addition to providing an installation base for the sealing shell 2, the drive mechanism of the trailer hook 3, and even the components in the entire trailer towing device, the connecting plate 1 is also used to connect with the vehicle body or frame structure to enable the trailer towing device to be installed on the vehicle.

[0044] In practical implementation, the connection method between the aforementioned connecting plate 1 and the vehicle body or frame structure can refer to the existing conventional vehicle body connection methods. In order to ensure the reliability of the trailer towing device in the vehicle and to provide sufficient traction strength for the trailer hook 3, the connecting plate 1 should generally also be connected to the main frame structure (such as the frame or main longitudinal beam of the vehicle body).

[0045] As one exemplary implementation, when the trailer towing device is installed on the vehicle, for example, an installation crossbeam can be set at the rear end of the vehicle to connect with the main longitudinal beams of the left and right sides of the vehicle body or the longitudinal beams of the frame. The connecting plate 1 is then fixed to the installation crossbeam, thereby realizing the overall arrangement of the trailer towing device in the vehicle.

[0046] In addition, it should be noted that, based on the fact that the first sealing ring 5 and the end of the first housing 21 connected to the connecting plate 1 are both annular structures, the inner side of the first sealing ring 5 mentioned above refers to the side of the first sealing ring 5 facing the receiving space Q, and correspondingly, the outer side of the first sealing ring 5 refers to the side of the first sealing ring 5 facing away from the receiving space Q, that is, the side of the first sealing ring 5 facing the outside.

[0047] In this embodiment, the following continues... Figure 3 and combined Figure 7 and Figure 8 As shown, in some exemplary embodiments, a mounting groove 203 may be provided on the first housing 21, thereby allowing the first sealing ring 5 to be disposed within the mounting groove 203. Structurally, the mounting groove 203 has a rectangular cross-section, and the cross-section of the first sealing ring 5 also matches the mounting groove 203, and is also rectangular.

[0048] It should be noted that the cross-section of the first sealing ring 5 matches the mounting groove 203 and is also rectangular. This includes the fact that the cross-section of the first sealing ring 5 is a standard rectangle, and also includes the fact that the cross-section of the first sealing ring 5 resembles a rectangle overall. As an example, this resemblance to a rectangle can, for instance, mean that the cross-section of the first sealing ring 5 is... Figure 11 The shape shown.

[0049] It is understandable that by providing an installation groove 203 on the first housing 21, the first sealing ring 5 is located within the installation groove 203. At the same time, the cross-section of the installation groove 203 is rectangular, and the cross-section of the first sealing ring 5 matches the installation groove 203. This not only facilitates the installation and arrangement of the first sealing ring 5 between the first housing 21 and the connecting plate 1, thus improving the ease of installation of the first sealing ring 5, but also obviously ensures the stability of the first sealing ring 5 after installation between the first housing 21 and the connecting plate 1. This effectively prevents problems such as displacement or even detachment of the first sealing ring 5, thereby ensuring its sealing effect.

[0050] In this embodiment, as follows... Figure 9 and Figure 10 As shown, in some exemplary embodiments, the inner and outer sidewalls of the first sealing ring 5 are provided with abutment protrusions 501. The abutment protrusions 501 on the inner and outer sidewalls are arranged in multiples at intervals along the circumference of the first sealing ring 5, and each abutment protrusion 501 is also interference-fitted with the groove wall of the mounting groove 203.

[0051] At this time, by providing abutment protrusions 501 on the inner and outer sidewalls of the first sealing ring 5, and making the abutment protrusions 501 interference fit with the groove wall of the mounting groove 203, it can be understood that after the first sealing ring 5 is placed in the mounting groove 203, it can prevent the first sealing ring 5 from falling out of the mounting groove 203 during transportation or assembly, and further improve the convenience of installing the first sealing ring 5.

[0052] In specific implementation, as an example, the aforementioned abutment protrusion 501 may be hemispherical, and each of the aforementioned abutment protrusions 501 may be integrally formed on the side wall of the first sealing ring 5 during the preparation of the first sealing ring 5.

[0053] In addition, it is worth noting that, in addition to the abutting protrusions 501 being provided on both the inner and outer walls of the first sealing ring 5, it is also acceptable to provide the abutting protrusions 501 only on the inner or outer wall of the first sealing ring 5, as long as the stability of the first sealing ring 5 in the mounting groove 203 can be guaranteed.

[0054] In this embodiment, we continue to combine Figure 10 and Figure 11 As shown, in some exemplary embodiments, a sealing protrusion 502 may be provided at the end of the first sealing ring 5 that abuts against the connecting plate 1. The sealing protrusion 502 is specifically a ring arranged circumferentially around the first sealing ring 5, and the sealing protrusion 502 also includes an inner protrusion 5021 arranged near the inner side of the first sealing ring 5, and an outer protrusion 5022 arranged near the outer side of the first sealing ring 5.

[0055] Therefore, by providing two sealing protrusions 502, consisting of an inner protrusion 5021 and an outer protrusion 5022 arranged side by side, at the end where the first sealing ring 5 abuts against the connecting plate 1, this embodiment can obviously form a double sealing structure between the first sealing ring 5 and the connecting plate 1. During use, when the outer protrusion 5022 fails, the inner protrusion 5021 can be used to block it, so as to achieve a double seal between the first housing 21 and the connecting plate 1, thereby achieving a higher sealing level.

[0056] In specific implementation, the inner protrusion 5021 and the outer protrusion 5022 located at one end of the first sealing ring 5 can both be integrally formed onto the first sealing ring 5 during its fabrication. Meanwhile, as an example, see also... Figure 11 As shown, the end face of each sealing protrusion 5021 that contacts the connecting plate 1 can be, for example, an arc surface, to help ensure the sealing performance between the first sealing ring 5 and the connecting plate 1.

[0057] In this embodiment, in some exemplary implementations, each of the first connecting members 4 can be a bolt, for example. To achieve the connection of the first connecting members 4, a first connecting through hole 201 can be provided on the first housing 21, and a first threaded hole 101 can be provided on the connecting plate 1. In this way, each first connecting member 4 passes through the corresponding first connecting through hole 201 and is connected in the corresponding first threaded hole 101.

[0058] It is understandable that bolts are used for the first connecting member 4 because they have the advantages of simple structure, low cost, and easy connection operation. At the same time, they can also ensure the stability of the connection between the first housing 21 and the connecting plate 1.

[0059] Since the first connecting member 4 uses bolts, in this embodiment, further, in combination with... Figure 8 As shown, for example, multiple steel sleeves 6 may be embedded in the first housing 21, thereby forming each first connection through hole 201 by a corresponding steel sleeve 6 embedded in the first housing 21.

[0060] Thus, by providing a steel sleeve 6 inside the first housing 21, the first connecting through hole 201 is formed by the steel sleeve 6. It can be understood that the steel sleeve 6 can also bear the tightening torque of the bolt, i.e. the first connecting member 4, and prevent the first sealing ring 5 from losing its clamping force due to deformation of the first housing 21, thus causing the seal between the first housing 21 and the connecting plate 1 to fail.

[0061] In specific implementation, it is worth noting that the first shell 21 and the second shell 22 in the sealing shell 2 can generally be formed by casting, and preferably, both can be cast aluminum parts, so that while making it easy to form, the sealing shell 2 as a whole has better structural strength, and it is also more conducive to realizing the lightweight design of the sealing shell 2.

[0062] Based on the use of cast aluminum for the sealing shell 2, the aforementioned steel sleeve 6 can be placed in the mold during the casting of the first shell 21, and finally embedded in the first shell 21 as the aluminum liquid is poured and formed.

[0063] Based on the steel sleeve 6 provided in the first housing 21, continue as follows Figure 12 As shown, in some exemplary embodiments, a groove 601 may be provided on the outer peripheral wall of the steel sleeve 6, and a portion of the first housing 21 may be embedded in the groove 601. Thus, by providing a groove 601 on the outer peripheral wall of the steel sleeve 6 and embedding a portion of the first housing 21 in the groove 601, the stability of the steel sleeve 6 embedded in the first housing 21 is ensured, and the stability of the connection and seal between the first housing 21 and the connecting plate 1 is also guaranteed.

[0064] In this embodiment, it is still by Figure 1 , Figure 2 as well as Figure 4 As shown, in some exemplary embodiments, there may be two internal connectors 41 in the first connector 4, and the internal connectors 41 are also positioned close to the top of the first housing 21.

[0065] In this way, the internal connector 41 installed inside the sealing shell 2 is positioned close to the top of the first shell 21, which means that the internal connector 41 is located at the top of the sealing shell 2. It can take advantage of the fact that the top position of the sealing shell 2 is generally close to the trailer towing device or other peripheral parts in the vehicle (such as the mounting beam), and avoid the inconvenience caused by the large size and space occupied by the top position of the sealing shell 2, which may easily interfere with the peripheral parts.

[0066] In this embodiment, the following continues... Figure 1 , Figure 2 and combined Figure 13 and Figure 14 As shown, in some exemplary embodiments, the first housing 21 and the second housing 22 in the sealing shell 2 can be connected together, for example, by a plurality of second connectors 7, and a second sealing ring 8 is also provided between the first housing 21 and the second housing 22, such that each second connector 7 is located on the same side of the second sealing ring 8.

[0067] At this time, the first housing 21 and the second housing 22 are connected by the second connector 7, and a second sealing ring 8 is provided between the first housing 21 and the second housing 22. Also, each of the second connectors 7 is located on the same side of the second sealing ring 8. It can be understood that this facilitates the connection design between the first housing 21 and the second housing 22, and also helps to reduce the design and manufacturing cost of the connection structure between the first housing 21 and the second housing 22.

[0068] In a preferred embodiment, the second connector 7 can be a bolt, for example. To achieve the connecting function of the second connector 7, a second threaded hole 202 can be provided on the first housing 21 corresponding to each second connector 7, and correspondingly, a second connecting through hole 204 is also provided on the second housing 22. Each second connector 7 passes through its corresponding second connecting through hole 204 and is connected to its corresponding second threaded hole 202.

[0069] Furthermore, since a second sealing ring 8 is also provided between the first housing 21 and the second housing 22, in a specific implementation, similar to the structure and arrangement of the first sealing ring 5 described above, a groove structure for providing the second sealing ring 8 can also be provided on the first housing 21. This groove structure is located at the end where the first housing 21 and the second housing 22 are connected, relative to the mounting groove 203, and the cross-section of the groove structure can also be rectangular, similar to the mounting groove 203. Of course, the cross-section of the second sealing ring 8 is also rectangular, matching the groove structure described above.

[0070] Since the cross-section of the second sealing ring 8 is rectangular, it is similar to the first sealing ring 5 mentioned above. For example, a structure similar to the aforementioned abutment protrusion 501 and sealing protrusion 502 can also be provided on the second sealing ring 8 to ensure the stability of the second sealing ring 8 in the groove structure of the first housing 21, facilitate the assembly of the second sealing ring 8, and also ensure the sealing effect between the first housing 21 and the second housing 22.

[0071] In this embodiment, in some exemplary implementations, for example, anti-collision structures can be provided on the outer walls of the first housing 21 and the second housing 22, and taking the provision of such anti-collision structures on the first housing 21 as an example, the following reference is still made. Figure 13 As shown, the aforementioned anti-collision structure may include, for example, multiple raised ribs 2a arranged side by side.

[0072] The first shell 21 and the second shell 22 are preferably made by casting. The above-mentioned protruding ribs 2a can be integrally formed when the two shells are cast. In terms of specific arrangement, the anti-collision structure on the first shell 21 and the second shell 22, that is, each protruding rib 2a, should generally be located at the lower part of the sealing shell 2 and can be arranged close to the bottom of the sealing shell 2, so as to achieve a better anti-collision effect.

[0073] It is understandable that by setting anti-collision structures on the outer walls of the first shell 21 and the second shell 22, and making the anti-collision structures adopt multiple protruding ribs 2a arranged in parallel, this embodiment can not only ensure that when the sealing shell 2 collides with an external barrier (such as a stone), the protruding ribs 2a contact the barrier first, thus preventing the barrier from directly impacting the wall of the sealing shell 2 and causing damage to the sealing shell 2, but also take advantage of the simple structure and easy molding of the protruding ribs 2a, which is obviously beneficial to the design and preparation of the anti-collision structure, and can avoid the large preparation cost of the sealing shell 2 due to the setting of the anti-collision structure.

[0074] Additionally, it should be noted that, besides providing anti-collision structures on the outer walls of both the first housing 21 and the second housing 22, given the shapes of the first housing 21 and the second housing 22, and the positions of the two housings at the rear of the vehicle when the trailer towing device is installed on the vehicle, anti-collision structures may also be provided only on the first housing 21 or the second housing 22. Furthermore, regardless of whether the anti-collision structure is provided on the first housing 21 or the second housing 22, the anti-collision structure should be arranged close to the bottom of the sealing shell 2.

[0075] It is worth noting that, regarding the sealing structure of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 14 As shown, it may include, for example, a connecting plate 1 and a sealing shell 2 located on one side of the connecting plate 1.

[0076] Specifically, the sealing shell 2 includes a first shell 21 and a second shell 22 that are detachably connected. The first shell 21 is connected to the connecting plate 1 by a plurality of first connectors 4, and a first sealing ring 5 is provided between the first shell 21 and the connecting plate 1. The plurality of first connectors 4 also includes an internal connector 41 installed inside the sealing shell 2 and an external connector 42 installed outside the sealing shell 2, with the internal connector 41 located inside the first sealing ring 5 and the external connector 42 located outside the first sealing ring 5.

[0077] The first sealing ring 5 is set in the mounting groove 203 on the first housing 21. The first sealing ring 5 is provided with an abutment protrusion 501 and a sealing protrusion 502 respectively. Meanwhile, each first connecting member 4 is bolted, and a steel sleeve 6 is provided in the first housing 21. The internal connecting member 41 in the first connecting member 4 is set near the top of the first housing 21.

[0078] The first housing 21 and the second housing 22 are detachably connected by a plurality of second connectors 7, and a second sealing ring 8 is also provided between the first housing 21 and the second housing 22. Furthermore, an anti-collision structure composed of protruding ribs 2a is provided on the outer walls of the first housing 21 and the second housing 22.

[0079] In the preferred embodiment of the sealing structure above, the specific configuration and arrangement of the first housing 21, the second housing 22, the first sealing ring 5, and the steel sleeve 6 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the first housing 21, the second housing 22, the first sealing ring 5, and the steel sleeve 6 can also be referred to the descriptions in the above exemplary embodiments.

[0080] The sealing structure of this embodiment adopts the above design. By designing part of the first connecting member 4 inside the sealing shell 2, it can avoid the first connecting member 4 being arranged entirely along the outer edge of the sealing shell 2, which would result in a large size and space occupation of the sealing shell 2, affecting its arrangement and hindering the realization of lightweight design, and thus improving the overall quality of the trailer towing device.

[0081] The second aspect of this application provides a trailer towing device, which is a fully automatic trailer towing device, and the trailer towing device has the sealing structure described in the first aspect embodiment above.

[0082] The trailer towing device of this embodiment, by adopting the sealing structure described above, can reduce the size of the sealing shell 2 in the trailer towing device, reduce its space occupation, and facilitate the lightweight design of the trailer towing device, thereby improving the overall quality of the trailer towing device.

[0083] A third aspect of this application provides a vehicle equipped with a trailer towing device as described in the second aspect embodiment above. The vehicle in this embodiment, by being equipped with the trailer towing device as described above, facilitates the arrangement of the trailer towing device on the vehicle and also helps to achieve overall vehicle weight reduction, thus having good practicality.

[0084] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A sealing structure for a trailer towing device, characterized in that: It includes a connecting plate (1) and a sealing shell (2) located on one side of the connecting plate (1), the sealing shell (2) being used to accommodate the drive mechanism of the trailer hook (3); The sealing shell (2) includes a first shell (21) and a second shell (22) that are detachably connected. The first shell (21) is connected to the connecting plate (1) by a plurality of first connectors (4), and a first sealing ring (5) is provided between the first shell (21) and the connecting plate (1). The plurality of first connectors (4) include an internal connector (41) installed inside the sealing shell (2) and an external connector (42) installed outside the sealing shell (2), wherein the internal connector (41) is located inside the first sealing ring (5) and the external connector (42) is located outside the first sealing ring (5).

2. The sealing structure according to claim 1, characterized in that: The first housing (21) is provided with a mounting groove (203), and the first sealing ring (5) is disposed in the mounting groove (203); The mounting groove (203) has a rectangular cross-section, and the cross-section of the first sealing ring (5) is matched with that of the mounting groove (203).

3. The sealing structure according to claim 2, characterized in that: The first sealing ring (5) has abutting protrusions (501) on its inner and / or outer side walls. The abutting protrusions (501) are a plurality of those arranged at intervals along the circumference of the first sealing ring (5), and the abutting protrusions (501) are interference fit with the groove wall of the mounting groove (203).

4. The sealing structure according to claim 2, characterized in that: The first sealing ring (5) has a sealing protrusion (502) at one end that abuts against the connecting plate (1). The sealing protrusion (502) is a ring arranged around the first sealing ring (5) in the circumference, and the sealing protrusion (502) includes an inner protrusion (5021) arranged near the inner side of the first sealing ring (5) and an outer protrusion (5022) arranged near the outer side of the first sealing ring (5).

5. The sealing structure according to claim 1, characterized in that: Each of the first connecting parts (4) is made of bolts; Each of the first connectors (4) passes through the first connection through hole (201) on the first housing (21) and is connected to the first threaded hole (101) on the connecting plate (1), and the first connection through hole (201) is formed by a steel sleeve (6) embedded in the first housing (21).

6. The sealing structure according to claim 5, characterized in that: The outer peripheral wall of the steel sleeve (6) is provided with a groove (601), and part of the first housing (21) is embedded in the groove (601).

7. The sealing structure according to claim 1, characterized in that: The first housing (21) and the second housing (22) are connected together by a plurality of second connectors (7), and a second sealing ring (8) is provided between the first housing (21) and the second housing (22). Each of the second connectors (7) is located on the same side of the second sealing ring (8).

8. The sealing structure according to any one of claims 1 to 7, characterized in that: The internal connector (41) is disposed near the top of the first housing (21); and / or, At least one of the first housing (21) and the second housing (22) has an anti-collision structure on its outer wall, the anti-collision structure including a plurality of protruding ribs (2a) arranged side by side.

9. A trailer towing device, characterized in that: The trailer towing device has a sealing structure as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is equipped with the trailer towing device as described in claim 9.

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