Automobile rear coupler installation structure

Abstract

The present invention provides a rear tow hook mounting structure for an automobile, comprising a rear outer panel and a rear inner panel welded together, a notch being provided at the bottom of the rear outer panel and the rear inner panel, a threaded tube passing through the notch and being fixedly connected to the rear inner panel via a mounting plate, the core of the threaded tube being aligned with the vehicle length, a reinforcing plate being provided in a cavity enclosed by the rear outer panel and the rear inner panel directly above the notch, the plate surface of the reinforcing plate being arranged in a vertical plane and parallel to the vehicle length, and the reinforcing plate being welded to the rear outer panel and the rear inner panel. When the threaded tube is subjected to a drag force, the rear outer panel and the rear inner panel directly above the notch are the locations subject to the greatest torsional force and are also the locations most susceptible to deformation. Therefore, the reinforcing plate is provided in the cavity enclosed by the rear outer panel and the rear inner panel directly above the notch, thereby improving the overall torsional rigidity of the rear cavity and also improving the tensile strength of the rear tow hook mounting structure in the Z direction.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to an automobile rear coupler mounting structure. Background Art

[0002] A tow hook is a vehicle-mounted tool used for towing when a vehicle is stuck in muddy roads or is unable to move due to a traffic accident. In practice, the tow hook and its mounting structure bear significant tensile forces. Furthermore, the strength standards for tow hooks and their mounting structures under specified operating conditions are mandatory national regulations. Therefore, high structural strength must be ensured during design.

[0003] The invention patent, entitled "An Automobile Rear Tow Hook Mounting Structure and Automobile" (Granted Publication No. CN203888555U) (hereinafter referred to as Document 1), discloses the following technical solution: a rear unhooking sleeve is welded to a sleeve fixing plate. The sleeve fixing plate comprises a first side plate welded to the lower portion of the rear sill connecting plate. The rear tow hook sleeve is welded to the rear sill connecting plate, and the rear sill connecting plate is welded to the right longitudinal beam of the rear floor. Because the first side plate of the sleeve fixing plate is welded to the lower portion of the rear sill connecting plate, the rear tow hook sleeve and the sleeve fixing plate are positioned closer to the outside of the vehicle body after welding. This allows the rear tow hook to be directly connected to the rear tow hook sleeve during installation without passing through other components. This reduces the overhang length of the rear tow hook, making it less likely to cause weld failure between the rear tow hook sleeve and the sleeve fixing plate, thereby effectively ensuring the secure connection between the rear tow hook sleeve and the sleeve fixing plate. In the above solution, the sleeve fixing plate is welded to the right longitudinal beam of the rear floor through the rear door sill connecting plate. The two separate parts, the sleeve fixing plate and the rear door sill connecting plate, are also welded, which reduces the overall strength. Figure 6 It can be concluded that a first support plate and a second support plate are provided between the rear sill inner panel and the rear sill outer panel near the right side of the tail cross beam, and the first support plate and the second support plate are respectively located on both sides of the portion of the rear sill inner panel connected to the rear floor. Since the sleeve fixing plate is a U-shaped plate, the two flanges are welded to the bottom of the rear sill inner panel. When the rear tow hook sleeve is subjected to the dragging force of the rear tow hook, the portion of the rear sill inner panel used to fix the sleeve fixing plate is subjected to a great force and is prone to deformation, resulting in insufficient ability of the rear sill inner panel to withstand the force transmitted by the rear tow hook, thereby affecting the stress strength of the vehicle body. Summary of the Invention

[0004] The purpose of the present invention is to provide a rear coupler mounting structure for an automobile which can improve the stress-bearing strength of a vehicle body and withstand greater dragging force.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a rear hook mounting structure of an automobile, comprising a rear outer panel and a rear inner panel welded to each other, a notch is provided at the lower part of the rear outer panel and the rear inner panel, a threaded tube passes through the notch and is fixedly connected to the rear inner panel through the mounting plate, the tube core of the threaded tube is consistent with the vehicle length direction, a reinforcing plate is provided in the cavity enclosed by the rear outer panel and the rear inner panel directly above the notch, the plate surface of the reinforcing plate is arranged in a vertical plane and the plate surface is parallel to the vehicle length direction, and the reinforcing plate is welded to the rear outer panel and the rear inner panel.

[0006] In the above scheme, when the threaded tube is subjected to dragging force, the rear enclosure outer panel and the rear enclosure inner panel directly above the notch are the positions that bear the greatest torsional force and are also the positions most prone to deformation. Therefore, the reinforcement plate is arranged in the cavity enclosed by the rear enclosure outer panel and the rear enclosure inner panel directly above the notch, which improves the overall torsional stiffness of the rear enclosure cavity and also improves the tensile strength of the rear tow hook mounting structure in the Z direction, thereby avoiding the tow hook breakage, deformation and cracking of the tow hook mounting structure, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a three-dimensional diagram of the rear coupler installation structure;

[0008] Figure 2 for Figure 1 Exploded view of;

[0009] Figure 3 for Figure 1 Bottom view of

[0010] Figure 4 for Figure 3 The main view;

[0011] Figure 5 A perspective view of the connection between the mounting plate and the rear longitudinal member;

[0012] Figure 6 Schematic diagram of the installation of the reinforcement plate. DETAILED DESCRIPTION

[0013] For the sake of convenience, we first define the following directions: Since the rear car is located at the rear of the car, the side close to the rear of the car is defined as "outside" and the side close to the car body is defined as "inside". Figure 1-Figure 5 The present invention is described in further detail.

[0014] A rear vehicle hook mounting structure includes a rear panel 10 and a rear panel 20 welded together. A notch a is provided at the bottom of each panel. A threaded tube 30 passes through the notch a and is fixedly connected to the rear panel 20 via a mounting plate 40. The core of the threaded tube 30 is aligned with the vehicle's length. A reinforcing plate 70 is disposed within the cavity enclosed by the rear panel 10 and the rear panel 20 directly above the notch a. The reinforcing plate 70 is arranged in a vertical plane and parallel to the vehicle's length. The reinforcing plate 70 is welded to the rear panel 10 and the rear panel 20. When the vehicle needs to be towed, the tow hook is tightened with the threaded tube 30 to achieve the towing function. A force analysis of the rear coupler installation position shows that when the threaded tube 30 is subjected to a dragging force, the rear enclosure outer panel 10 and the rear enclosure inner panel 20 directly above the notch a are the positions that bear the greatest torsional force, that is, the positions that are most prone to deformation. Therefore, the reinforcing plate 70 is arranged in the cavity enclosed by the rear enclosure outer panel 10 and the rear enclosure inner panel 20 directly above the notch a, which improves the overall torsional stiffness of the rear enclosure cavity and also improves the tensile strength of the rear tow hook installation structure in the Z direction, thereby avoiding the tow hook breakage, deformation and cracking of the tow hook installation structure, etc.

[0015] As a preferred embodiment of the present invention, the reinforcing plate 70 is in the shape of a square plate with a hollow portion in the middle of the square plate. While ensuring the overall strength of the reinforcing plate 70, the weight can be reduced. The upper and lower plate edges and the front plate edge of the reinforcing plate 70 are provided with a first welding plate 71. The first welding plate 71 is abutted against and welded to the plate surface of the rear outer panel 10 and the rear inner panel 20. The contact area with the rear outer panel 10 and the rear inner panel 20 is ensured to be as large as possible through each welding plate, thereby ensuring the reliability of the connection between the two. At the same time, positioning holes are opened on the plate surface of the reinforcing plate 70 for use in positioning the clamp when welding the reinforcing plate 70.

[0016] Furthermore, the mounting plate 40 is in the shape of an arc plate as a whole, and a U-shaped groove 41 with an opening upward is provided at the front of the mounting plate 40. The rear end of the threaded tube 30 is placed in the U-shaped groove 41 and welded. A first external flange 42 is turned outward at the notch of the U-shaped groove 41. The first external flange 42 is welded to the bottom surface of the rear inner panel 20. The rear part of the mounting plate 40 is connected to the fourth welding edge 44 with an upward rounded transition. The fourth welding edge 44 extends to the bottom of the rear longitudinal beam 50 and is welded. The mounting plate 40 serves as an intermediate transition piece connecting the threaded tube 30 and the vehicle body. On the one hand, it is necessary to ensure the welding strength between the mounting plate 40 and the rear longitudinal beam 50 and the rear inner panel 20, that is, the mounting plate 40 itself must be reliably connected to the vehicle body, so as to provide reliable mounting strength for the threaded tube 30. On the other hand, the contour of the inner groove wall of the upward-opening U-shaped groove 41 of the front of the mounting plate 40 is consistent with the contour of the outer wall of the threaded tube 30, so that the outer wall of the threaded tube 30 can be in contact with the inner groove wall of the U-shaped groove 41 and firmly connected together by oxygen shielded welding.

[0017] In order to improve the welding strength between the mounting plate 40 and the rear longitudinal beam 50, a first welding edge 43 is provided at the left and right side notches at the rounded transition position of the mounting plate 40. The rear longitudinal beam 50 is also in the shape of a U-shaped groove with an opening upward. A second welding edge 51 is also provided on the groove walls on both sides of the front end of the rear longitudinal beam 50. The plate surfaces of the first welding edge 43 and the second welding edge 51 are inclined surfaces that match the plate surface of the rear vertical plate 21 of the rear inner panel 20. The first welding edge 43 and the second welding edge 51 are attached to and welded to the rear vertical plate 21.

[0018] Similarly, a third welding edge 52 is turned upward at the bottom of the groove at the front end of the rear longitudinal beam 50. The third welding edge 52 is attached to and welded to the rear vertical plate 21 on the rear inner panel 20 to ensure welding strength and prevent the risk of deformation.

[0019] In order to ensure the welding strength of the rear longitudinal beam 50, a second external flange 53 is provided on both sides of the notch of the rear longitudinal beam 50. The front part of the second external flange 53 is abutted and welded to the flange 22 of the upper edge of the rear vertical plate 21 turned toward the rear side, and the rear part of the second external flange 53 is abutted and welded to the bottom of the rear floor 60.

[0020] Reinforcing ribs 54 are provided at the junction of the groove wall, the groove bottom and the second external flange 53 of the rear longitudinal beam 50 to increase the strength of the rear longitudinal beam 50 . A hoisting hole 55 is provided on the groove bottom of the rear longitudinal beam 50 for hoisting and moving.

[0021] Furthermore, the flange 22 of the rear inner panel 20 is abutted and welded to the bottom of the rear floor 60, and a rear welding edge 61 extends rearward from the rear portion of the rear floor 60. The rear welding edge 61 is abutted and welded to the upper flange of the rear outer panel 10, and a D-pillar lower inner panel 80 is welded to the outer side of the rear end of the rear floor 60.

[0022] The lower parts of the rear outer panel 10 and the rear inner panel 20 are both provided with a second welding plate b extending downward. The two second welding plates b are bonded and welded to ensure the reliability of the welding of the rear outer panel 10 and the rear inner panel 20. The notch a is provided on the second welding plate b, and the threaded tube 30 passing through the notch a passes from the bottom of the rear inner panel 20.

Claims

1. A rear coupler mounting structure for an automobile, comprising a rear outer panel (10) and a rear inner panel (20) welded to each other, characterized in that: A notch (a) is provided at the lower portion of the rear enclosure outer panel (10) and the rear enclosure inner panel (20), a threaded tube (30) passes through the notch (a) and is fixedly connected to the rear enclosure inner panel (20) through the mounting plate (40), the tube core of the threaded tube (30) is consistent with the vehicle length direction, a reinforcing plate (70) is provided in the cavity enclosed by the rear enclosure outer panel (10) and the rear enclosure inner panel (20) just above the notch (a), the plate surface of the reinforcing plate (70) is arranged in a vertical plane and the plate surface is parallel to the vehicle length direction, and the reinforcing plate (70) is welded to the rear enclosure outer panel (10) and the rear enclosure inner panel (20); The mounting plate (40) is in the shape of an arc plate as a whole. A U-shaped groove (41) with an upward opening is provided at the front of the mounting plate (40). The rear end of the threaded tube (30) is placed in the U-shaped groove (41) and welded. A first external flange (42) is turned outward at the notch of the U-shaped groove (41). The first external flange (42) is welded to the bottom surface of the rear inner plate (20). The rear of the mounting plate (40) is connected to a fourth welding edge (44) with an upward rounded transition. The fourth welding edge (44) extends to the bottom of the rear longitudinal beam (50) and is welded.

2. The automobile rear coupler mounting structure according to claim 1, characterized in that: The reinforcing plate (70) is in the shape of a square plate with an outer periphery, and a hollow portion is provided in the middle of the square plate. The upper and lower plate edges and the front plate edge of the reinforcing plate (70) are provided with a first welding plate (71), and the first welding plate (71) is abutted against and welded to the plate surfaces of the rear enclosure outer plate (10) and the rear enclosure inner plate (20).

3. The automobile rear coupler mounting structure according to claim 1, characterized in that: A first welding edge (43) is provided at the left and right notches at the rounded corner transition position of the mounting plate (40), and the rear longitudinal beam (50) is also in the shape of a U-shaped groove with an opening facing upward. A second welding edge (51) is also provided on the groove walls on both sides of the front end of the rear longitudinal beam (50). The plate surfaces of the first welding edge (43) and the second welding edge (51) are inclined surfaces that match the plate surface of the rear vertical plate (21) of the rear inner plate (20), and the first welding edge (43) and the second welding edge (51) are attached and welded to the rear vertical plate (21).

4. The automobile rear coupler mounting structure according to claim 3, characterized in that: A third welding edge (52) is turned upwards at the bottom of the groove at the front end of the rear longitudinal beam (50), and the third welding edge (52) is bonded and welded to the rear vertical plate (21) on the rear inner plate (20).

5. The automobile rear coupler mounting structure according to claim 3, characterized in that: A second external flange (53) is provided on both sides of the notch of the rear longitudinal beam (50), the front portion of the second external flange (53) is abutted against and welded to the flange (22) of the upper plate edge of the rear vertical plate (21) that is turned toward the rear side, and the rear portion of the second external flange (53) is abutted against and welded to the bottom of the rear floor (60).

6. The automobile rear coupler mounting structure according to claim 5, characterized in that: A reinforcing rib (54) is provided at the junction of the groove wall, the groove bottom, and the second external flange (53) of the rear longitudinal beam (50), and a hoisting hole (55) is provided on the groove bottom of the rear longitudinal beam (50).

7. The automobile rear coupler mounting structure according to claim 5, characterized in that: The flange (22) of the rear inner panel (20) is abutted against and welded to the bottom of the rear floor (60); a rear welding edge (61) extends rearward from the rear portion of the rear floor (60); the rear welding edge (61) is abutted against and welded to the upper flange of the rear outer panel (10); and a D-pillar lower inner panel (80) is welded to the outer side of the rear end of the rear floor (60).

8. The automobile rear coupler mounting structure according to claim 1, characterized in that: A second welding plate (b) extending downward is provided at the lower portion of each of the rear enclosure outer plate (10) and the rear enclosure inner plate (20). The two second welding plates (b) are bonded and welded together, and the notch (a) is provided on the second welding plate (b).

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