Automobile dragging device

Abstract

The utility model provides an automobile dragging device, and relates to the technical field of automobiles. The automobile dragging device comprises a rear cross beam, a first connecting piece, a second connecting piece and a gasket, and a ball head hook used for traction is installed on the rear cross beam. The first connecting piece and the second connecting piece are arranged at the two axial ends of the rear cross beam respectively and used for connecting an automobile rear longitudinal beam and the rear cross beam, and an assembly gap is reserved between the first connecting piece and / or the second connecting piece and the rear cross beam. And the gasket is connected between the first connecting piece and the rear cross beam and / or between the second connecting piece and the rear cross beam and is used for compensating the assembly clearance. According to the automobile dragging device, the assembling gap is formed between the first connecting piece and / or the second connecting piece and the rear cross beam, interference between the rear cross beam and the first connecting piece and between the rear cross beam and the second connecting piece during assembling can be avoided, and the rear cross beam is convenient to install. The gasket is installed in the assembling gap for gap compensation, Y-direction tolerance is absorbed, and therefore the connecting strength of the structure is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an automobile towing device. Background Art

[0002] Currently, more and more vehicles in China have obtained towing qualifications. There are two main methods for installing the trailer hook used for towing: the first is to fix it directly to the rear panel with a nut. This installation method is easy to operate, but it has certain requirements for the strength of the rear panel. For some models, the strength of the rear panel may not be enough to support the weight of a larger trailer. The second method is to embed the trailer hook and related structural components into the rear longitudinal beam for installation. This method can significantly improve the structural strength of the trailer hook, but it may also cause dimensional deviation and fit clearance problems. If the gap is too large, there may be insufficient installation preload, which may lead to the risk of loosening, abnormal noise, and even breakage; conversely, if the gap is too small, the installation process will become difficult, causing inconvenience to the installer. Utility Model Content

[0003] An embodiment of the present application provides a vehicle towing device, which is used to solve the problems of difficult installation and insufficient structural strength of the towing device.

[0004] In some embodiments, a car towing device is provided, comprising a rear cross beam, a first connecting member, a second connecting member and a gasket, wherein a ball hook for towing is mounted on the rear cross beam; the first connecting member and the second connecting member are respectively arranged at both ends of the axial direction of the rear cross beam and are used to connect the rear longitudinal beam of the car to the rear cross beam, and an assembly gap is reserved between the first connecting member and / or the second connecting member and the rear cross beam; the gasket is detachably connected between the first connecting member and the rear cross beam and / or between the second connecting member and the rear cross beam to compensate for the assembly gap.

[0005] In some embodiments, a first mounting seat is fixedly provided on the rear cross beam, and the first mounting seat and the first connecting member are connected by a first main bolt and a first bolt arranged at intervals. An assembly gap is formed between the first mounting seat and the first connecting member, and the gasket is clamped with the first main bolt and the first bolt.

[0006] In some embodiments, the gasket is provided with a first notch and a second notch, the first notch is clamped with the first main bolt, the second notch is clamped with the first bolt, and the opening directions of the first notch and the second notch intersect.

[0007] In some embodiments, the first notch includes two opposite first straight side walls and a first curved side wall connected between the two first straight side walls, the first curved side wall matches the outer profile of the first main bolt, and the distance between the two first straight side walls gradually increases in a direction away from the first curved side wall.

[0008] In some embodiments, the gasket includes a limiting surface smoothly connected to the side wall of the second notch. When the first notch is engaged with the first bolt, the gasket can rotate around the first main bolt so that the first bolt slides into the second notch along the limiting surface.

[0009] In some embodiments, the gasket thickness is 1-2 mm, and the assembly gap is 2-3 mm.

[0010] In some embodiments, the first mounting seat is a plate-shaped structure, and the thickness of the first mounting seat is 5 to 10 mm.

[0011] In some embodiments, a first boss is fixedly provided on the first connecting member, and the first boss is fixedly connected to the rear longitudinal beam of the automobile through a first connecting bolt. The contact surface between the first boss and the rear longitudinal beam of the automobile is etched with a concave-convex structure for increasing the friction between the first boss and the rear longitudinal beam of the automobile.

[0012] In some embodiments, the first connecting member extends along the direction of the rear longitudinal beam of the automobile and overlaps with the rear longitudinal beam of the automobile. Two first connecting bolts are provided, and the first main bolt, the first bolt and the two first connecting bolts are arranged in sequence along the extension direction of the first connecting member.

[0013] In some embodiments, a second mounting seat is fixedly provided on the rear cross beam, and the second mounting seat and the second connecting member are connected by a second main bolt and a secondary bolt arranged at intervals. An assembly gap is formed between the second mounting seat and the second connecting member, and the gasket is clamped with the second main bolt and the secondary bolt.

[0014] The automobile towing device provided in the embodiment of the present application can first be fixedly connected to the first and second connectors with the rear longitudinal beam, and then the rear cross beam can be fixedly connected to the first and second connectors. To facilitate the assembly of the rear cross beam between the first and second connectors, the length of the rear cross beam can be designed to be slightly shorter than the distance between the first and second connectors. This can form an assembly gap between the first and / or second connectors and the rear cross beam, preventing interference between the rear cross beam and the first and second connectors during assembly, thereby facilitating the installation of the rear cross beam. A gasket is installed in the assembly gap to compensate for the gap and absorb Y-direction tolerance, thereby ensuring the connection strength of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 is a schematic structural diagram of a car towing device in some embodiments of the present application;

[0017] Figure 2 yes Figure 1 An exploded schematic diagram of a car towing device in an embodiment;

[0018] Figure 3 yes Figure 1 A schematic structural diagram of a gasket in an embodiment;

[0019] Figure 4 yes Figure 1 Schematic diagram of the structure of the first connecting member in the embodiment.

[0020] In the above drawings:

[0021] 10. Rear crossbeam; 20. Ball hook; 30. Gasket; 31. First notch; 311. First straight side wall; 312. First curved side wall; 32. Second notch; 33. Limiting surface;

[0022] 41. First connecting member; 411. First boss; 412. Concave-convex structure; 42. First mounting seat; 421. First main positioning hole; 422. Secondary positioning hole; 43. First main bolt; 44. Secondary bolt; 45. First connecting bolt;

[0023] 51. Second connecting member; 511. Second boss; 52. Second mounting seat; 53. Second main bolt; 54. Second secondary bolt; 55. Second connecting bolt. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only intended to illustrate the present application and are not intended to limit the scope of the present application. Similarly, the following examples are only some examples of the present application and not all examples. All other examples obtained by those of ordinary skill in the art without creative work are intended to fall within the scope of protection of this application.

[0025] The terms "first", "second" and "third" in the embodiments of the present application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second" and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, "multiple" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products or devices.

[0026] In this specification, the directional terms "X," "Y," and "Z" refer to the commonly used "body X," "body Y," and "body Z" directions in the automotive field, respectively. "Body X" refers to the length of the vehicle, also encompassing the front-to-back direction; "Body Y" refers to the width of the vehicle; and "Body Z" refers to the height of the vehicle, also encompassing the direction of gravity and the up-down direction.

[0027] See also Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of the structure of the car towing device in some embodiments of the present application. Figure 2 yes Figure 1 Exploded diagram of a vehicle towing device in an embodiment. The vehicle towing device of the present application is installed in the rear longitudinal beam area of ​​the vehicle and includes a rear cross beam 10, a first connector 41, a second connector 51, and a gasket 30. A ball hook 20 for towing is installed on the rear cross beam 10. The ball hook 20 is detachably fixedly connected to the rear cross beam 10 by bolts to facilitate replacement of the ball hook 20. The first connector 41 and the second connector 51 are respectively arranged at the axial ends (i.e., the Y direction) of the rear cross beam 10 and are used to connect the rear longitudinal beam of the vehicle to the rear cross beam 10. An assembly gap is reserved between the first connector 41 and the rear cross beam 10. The gasket 30 is detachably connected between the first connector 41 and the rear cross beam 10 to compensate for the assembly gap.

[0028] In this embodiment, the first connector 41 and the second connector 51 can be first fixedly connected to the rear longitudinal beam, and then the rear cross beam 10 can be fixedly connected to the first connector 41 and the second connector 51. To facilitate the assembly of the rear cross beam 10 between the first connector 41 and the second connector 51, the length of the rear cross beam 10 can be designed to be slightly shorter than the distance between the first connector 41 and the second connector 51. This can form an assembly gap between the first connector 41 and the rear cross beam 10, avoiding interference between the rear cross beam 10 and the first connector 41 and the second connector 51 during assembly, thereby facilitating the installation of the rear cross beam 10. Since an excessively large assembly gap can lead to insufficient connection strength, a gasket 30 can be installed in the assembly gap to compensate for the gap and absorb the Y-direction tolerance, thereby ensuring the connection strength of the structure.

[0029] Among them, a first mounting seat 42 is fixedly provided on the rear cross beam 10, and the first mounting seat 42 is welded to the rear cross beam 10. The first mounting seat 42 and the first connecting member 41 are connected by a first main bolt 43 and a first bolt 44 arranged at intervals. An assembly gap is formed between the first mounting seat 42 and the first connecting member 41, and the gasket 30 is engaged with the first main bolt 43 and the first bolt 44. The first mounting seat 42 is provided with a first main positioning hole 421 corresponding to the first main bolt 43 and a first positioning hole 422 corresponding to the first bolt 44. During assembly, the first main bolt 43 and the first bolt 44 can be respectively inserted into the first main positioning hole 421 and the first positioning hole 422, and the first main bolt 43 and the first bolt 44 can be pre-tightened with nuts to prevent the rear cross beam 10 from separating from the first connecting member 41. It should be noted that the first main bolt 43 and the first bolt 44 are not fully tightened at this time. There is an assembly gap between the first mounting seat 42 and the first connecting member 41. The first main bolt 43 and the first bolt 44 can be tightened after the gasket 30 is installed. This can improve the convenience of assembly and stably clamp the gasket 30 between the first mounting seat 42 and the first connecting member 41 to ensure the stability of the structure.

[0030] Please continue reading Figure 1 as well as Figure 2 In some embodiments, this embodiment differs from the above embodiments in that there is no assembly gap between the first connector 41 and the rear crossbeam 10, while an assembly gap is reserved between the second connector 51 and the rear crossbeam 10. A gasket 30 is detachably connected between the second connector 51 and the rear crossbeam 10 to compensate for the assembly gap. By reserving an assembly gap between the second connector 51 and the rear crossbeam 10, this embodiment improves assembly convenience.

[0031] Specifically, a second mounting seat 52 is fixedly provided on the rear cross beam 10. The second mounting seat 52 and the second connecting member 51 are connected by a second main bolt 53 and a secondary bolt 54 arranged at intervals. An assembly gap is formed between the second mounting seat 52 and the second connecting member 51, and the gasket 30 is engaged with the second main bolt 53 and the secondary bolt 54. The second mounting seat 52 is provided with a second main positioning hole (not shown in the figure) corresponding to the second main bolt 53 and a secondary positioning hole (not shown in the figure) corresponding to the secondary bolt 54. During assembly, the second main bolt 53 and the secondary bolt 54 can be first inserted into the second main positioning hole and the secondary positioning hole respectively, and the second main bolt 53 and the secondary bolt 54 can be pre-tightened with nuts to prevent the rear cross beam 10 from being separated from the second connecting member 51.

[0032] Please continue reading Figure 1 as well as Figure 2 In some embodiments, this embodiment differs from the above embodiments in that an assembly gap is reserved between the first connector 41 and the rear crossbeam 10, and an assembly gap is reserved between the second connector 51 and the rear crossbeam 10. A gasket 30 is detachably connected between the first connector 41 and the rear crossbeam 10, and between the second connector 51 and the rear crossbeam 10, to compensate for the assembly gap.

[0033] It is understood that this embodiment combines the aforementioned arrangement of reserving an assembly gap only between the first connector 41 and the rear crossbeam 10 with reserving an assembly gap only between the second connector 51 and the rear crossbeam 10. In this embodiment, the first connector 41 and the second connector 51 are symmetrically arranged, and the ball hook 20 is located in the middle of the rear crossbeam 10. Because assembly gaps are provided at both ends of the rear crossbeam 10, and the distance between the first connector 41 and the second connector 51 is the same as the length of the rear crossbeam 10, the assembly gap in this embodiment is smaller than that in the embodiment in which an assembly gap is reserved only at one end of the rear crossbeam 10, thereby further ensuring connection strength. Furthermore, the symmetrical arrangement of the first connector 41 and the second connector 51 ensures that the connection nodes of the first connector 41, the rear crossbeam 10, and the rear longitudinal beams, and the connection nodes of the second connector 51, the rear crossbeam 10, and the rear longitudinal beams are evenly stressed, further enhancing the stability of the structure.

[0034] See also Figure 3 , Figure 3 yes Figure 1Schematic diagram of the structure of the gasket 30 in the embodiment. In this embodiment, the first connecting member 41 and the second connecting member 51 are symmetrically arranged. The following is a specific description of the connection structure of the first connecting member 41 and the gasket 30. For example, a first notch 31 and a second notch 32 are provided on the gasket 30. The first notch 31 is engaged with the first main bolt 43, and the second notch 32 is engaged with the first bolt 44. The opening directions of the first notch 31 and the second notch 32 intersect. Since the opening directions of the first notch 31 and the second notch 32 intersect, it is possible to prevent the first main bolt 43 from detaching from the first notch 31 or the first bolt 44 from detaching from the second notch 32, thereby ensuring the stability of the connection between the gasket 30 and the first main bolt 43 and the first bolt 44.

[0035] The first notch 31 includes two opposing first straight sidewalls 311 and a first curved sidewall 312 connected between the two first straight sidewalls 311. The first curved sidewall 312 matches the outer profile of the first main bolt 43. The gasket 30 is rotatably connected to the first main bolt 43 via the first curved sidewall 312. The distance between the two first straight sidewalls 311 gradually increases in a direction away from the first curved sidewall 312, so that the first main bolt 43 can be easily inserted into the first notch 31.

[0036] Furthermore, the gasket 30 includes a limiting surface 33 that is smoothly connected to the sidewall of the second notch 32. When the first notch 31 is engaged with the first main bolt 44, the gasket 30 can rotate about the first main bolt 43, causing the first main bolt 44 to slide along the limiting surface 33 into the second notch 32. The size of the second notch 32 matches the size of the first main bolt 44, allowing the first main bolt 44 to be squeezed and inserted into the second notch 32. The groove depth of the second notch 32 is smaller than that of the first notch 31, thereby facilitating the insertion of the first main bolt 44 into the second notch 32 while preventing the first main bolt 43 from being disengaged from the first notch 31.

[0037] Similarly, when the gasket 30 is inserted into the second connecting member 51 and the second mounting seat 52, the first notch 31 engages with the second main bolt 53, the second notch 32 engages with the secondary bolt 54, and the first curved sidewall 312 matches the outer profile of the second main bolt 53. The gasket 30 is rotatably connected to the second main bolt 53 via the first curved sidewall 312. The gasket 30 can rotate around the second main bolt 53, causing the secondary bolt 54 to slide along the limiting surface 33 into the second notch 32. The size of the second notch 32 matches the size of the secondary bolt 54, allowing the secondary bolt 54 to be squeezed and inserted into the second notch 32.

[0038] In some embodiments, the assembly clearance is 2-3 mm. In this embodiment, a 2.2 mm assembly clearance is left between the first connector 41 and the second connector 51 and the rear cross member 10. The thickness of the gasket 30 is 1-2 mm. One or more gaskets 30 may be provided to eliminate the gap difference between the parts, and this is not specifically limited here.

[0039] In some embodiments, the first mounting base 42 is a plate-shaped structure with a thickness of 5 to 10 mm. In this embodiment, the first mounting base 42 is made of 8 mm thick steel plate, which can reduce weight by more than 60% compared to the traditional "U"-shaped mounting plate on the rear cross member 10 assembly.

[0040] Similarly, the second mounting seat 52 is a plate-shaped structure, and the thickness of the first mounting seat 42 is 5-10 mm.

[0041] See also Figure 4 , Figure 4 yes Figure 1 Schematic diagram of the structure of the first connecting member 41 in an embodiment. In some embodiments, the first connecting member 41 is fixedly provided with a first boss 411, which is fixedly connected to the rear longitudinal beam of the vehicle via a first connecting bolt 45. The contact surface between the first boss 411 and the rear longitudinal beam of the vehicle is etched with a concave-convex structure 412 to increase the friction between the first boss 411 and the rear longitudinal beam of the vehicle. The first connecting bolt 45 can be directly threaded into the first boss 411, or it can be tightened with a nut after passing through the first boss 411.

[0042] Please combine Figure 1 as well as Figure 2 Furthermore, the first connecting member 41 extends along the direction of the rear longitudinal beam of the automobile (i.e., the X direction) and overlaps with the rear longitudinal beam of the automobile. There are two first connecting bolts 45, and the first main bolt 43, the first bolt 44 and the two first connecting bolts 45 are arranged in sequence along the extension direction of the first connecting member 41.

[0043] It is understood that the rear longitudinal beam and the first connecting member 41 can be fixed only by the two first connecting bolts 45, or the first main bolts 43 and the first secondary bolts 44 can be passed through the rear longitudinal beam and fixedly connected to the first mounting seat 42. This can further increase the overlap area between the rear longitudinal beam and the first connecting member 41, and the rear longitudinal beam and the rear cross beam 10 are connected by multiple bolts, thereby improving the strength of the connection structure.

[0044] Similarly, a second boss 511 is fixedly provided on the second connecting member 51, and the second boss 511 is fixedly connected to the rear longitudinal beam of the automobile through a second connecting bolt 55. The contact surface between the second boss 511 and the rear longitudinal beam of the automobile is etched with a concave-convex structure 412, which is used to increase the friction between the second boss 511 and the rear longitudinal beam of the automobile.

[0045] Furthermore, the second connecting member 51 extends along the direction of the rear longitudinal beam of the automobile and overlaps with the rear longitudinal beam of the automobile. Two second connecting bolts 55 are provided, and the second main bolt 53, the secondary bolt 54 and the two second connecting bolts 55 are arranged in sequence along the extension direction of the second connecting member 51 (i.e., the X direction).

[0046] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] The above descriptions are only some embodiments of the present application and do not limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A car towing device, characterized in that: include: a rear crossbeam on which a ball hook for towing is mounted; A first connecting member and a second connecting member are respectively provided at both ends of the rear cross beam in the axial direction and are used to connect the rear longitudinal beam of the automobile to the rear cross beam, and an assembly gap is reserved between the first connecting member and / or the second connecting member and the rear cross beam; A gasket is detachably connected between the first connecting member and the rear cross beam and / or between the second connecting member and the rear cross beam, and is used to compensate for the assembly gap.

2. The vehicle towing device according to claim 1, characterized in that: A first mounting seat is fixedly provided on the rear cross beam, and the first mounting seat and the first connecting member are connected by a first main bolt and a first bolt arranged at intervals. An assembly gap is formed between the first mounting seat and the first connecting member, and the gasket is clamped with the first main bolt and the first bolt.

3. The vehicle towing device according to claim 2, characterized in that: The gasket is provided with a first notch and a second notch, the first notch is clamped with the first main bolt, the second notch is clamped with the first bolt, and the opening directions of the first notch and the second notch intersect.

4. The vehicle towing device according to claim 3, characterized in that: The first notch includes two opposite first straight side walls and a first arcuate side wall connected between the two first straight side walls, the first arcuate side wall matches the outer profile of the first main bolt, and the distance between the two first straight side walls gradually increases in the direction away from the first arcuate side wall.

5. The vehicle towing device according to claim 3 or 4, characterized in that: The gasket includes a limiting surface smoothly connected to the side wall of the second notch. When the first notch is engaged with the first bolt, the gasket can rotate around the first main bolt so that the first bolt slides into the second notch along the limiting surface.

6. The vehicle towing device according to any one of claims 1 to 4, characterized in that: The thickness of the gasket is 1 to 2 mm, and the assembly gap is 2 to 3 mm.

7. The vehicle towing device according to any one of claims 2 to 4, characterized in that: The first mounting seat is a plate-shaped structure, and the thickness of the first mounting seat is 5 to 10 mm.

8. The vehicle towing device according to any one of claims 2 to 4, characterized in that: A first boss is fixedly provided on the first connecting member, and the first boss is fixedly connected to the rear longitudinal beam of the automobile through a first connecting bolt. The contact surface between the first boss and the rear longitudinal beam of the automobile is etched with a concave-convex structure for increasing the friction between the first boss and the rear longitudinal beam of the automobile.

9. The vehicle towing device according to claim 8, characterized in that: The first connecting member extends along the direction of the rear longitudinal beam of the automobile and overlaps with the rear longitudinal beam of the automobile. Two first connecting bolts are provided, and the first main bolt, the first bolt and the two first connecting bolts are arranged in sequence along the extending direction of the first connecting member.

10. The vehicle towing device according to any one of claims 1 to 4, characterized in that: A second mounting seat is fixedly provided on the rear cross beam, and the second mounting seat and the second connecting member are connected by second main bolts and secondary bolts arranged at intervals. An assembly gap is formed between the second mounting seat and the second connecting member, and the gasket is clamped with the second main bolt and the secondary bolt.

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