A large-opening-angle self-limiting back door hinge

Abstract

The application discloses a large-opening-angle self-limiting back door hinge and belongs to the field of automobile manufacturing. The hinge comprises a base installed on a vehicle body, a main rotating arm hingedly connected to the base, a secondary rotating arm hingedly connected to one end of the main rotating arm and fixed on a back door of the vehicle, a cavity formed in the middle of the main rotating arm, a connecting rod arranged in the cavity and hingedly connected to the base and the secondary rotating arm at two ends, a limiting roller assembly arranged at the end of the main rotating arm away from the secondary rotating arm, and a C-shaped torsion bar spring arranged on the base and movably abutting against the top of the limiting roller assembly. The limiting roller assembly and the C-shaped torsion bar spring enable the back door to be limited at one or more positions when being opened and closed. The application sets one or more limiting rollers on the main rotating arm, and the relative positions of the limiting rollers are set through calculation, so that the limiting rollers can be limited at one or more positions required by the door.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing, and specifically to a large-opening-angle self-limiting tailgate hinge. Background Technology

[0002] The tailgate hinge of a commercial vehicle is a key component that connects the tailgate to the vehicle body. It allows the tailgate to rotate around the same axis and fixes the tailgate's position for easy opening and closing.

[0003] In existing technologies, the limiting method for the hinges of large-angle double-opening tailgates in light passenger vehicles mainly combines the hinge with a door limiter. As long as the shape and movement trajectory of the connecting rod are designed reasonably, the limiting function can be well achieved. However, because the hinge structure is relatively complex, it is not easy to clean and maintain. After long-term use, it is prone to rust, jamming, abnormal noise, and other problems, resulting in poor reliability. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a large opening angle self-limiting rear door hinge, which can satisfy three-level limiting during the opening stroke of the rear door and has the characteristics of simple structure, low manufacturing cost and high reliability.

[0005] To achieve the above objectives, the present invention designs a large-opening-angle self-limiting tailgate hinge, comprising a base mounted on the vehicle body, a main rotating arm hinged to the base, and a secondary rotating arm hinged to the other end of the main rotating arm, the secondary rotating arm being fixed to the tailgate of the vehicle; a cavity is formed in the middle of the main rotating arm, and a connecting rod is provided in the cavity, the two ends of the connecting rod being respectively hinged to the base and the secondary rotating arm; a limiting roller assembly is provided at the end of the main rotating arm away from the secondary rotating arm; a C-type torsion bar spring is provided on the base, the tail end of the C-type torsion bar spring movably abutting against the top of the limiting roller assembly; the limiting roller assembly and the C-type torsion bar spring enable the tailgate of the vehicle to be limited to one or more positions when opening and closing.

[0006] Preferably, the limiting roller assembly includes two spaced roller mounting plates, and multiple sets of roller assemblies are fixed on the inner side of the two roller mounting plates. Each roller assembly includes two capped shafts symmetrically arranged on the roller mounting plates, and rotating rollers are mounted on the capped shafts, with adjacent rollers meshing with each other.

[0007] Preferably, the roller assembly consists of three sets.

[0008] Preferably, the base has a groove and a plurality of mounting through holes located inside the groove; a limiting rubber strip is installed at the end of the base, the limiting rubber strip includes a strip body, and the strip body has a plurality of mounting posts that cooperate with the mounting through holes.

[0009] Preferably, spring mounting holes are provided on both sides of the base, and the open end of the C-type torsion bar spring is movably installed in the spring mounting holes.

[0010] Preferably, the main rotating arm includes a base plate, and the bottom of the base plate is provided with side walls on both sides. The two ends of the side walls are provided with first mounting holes. A first main pin is provided between two symmetrically arranged first mounting holes, and a second main pin is provided in the other two symmetrically arranged first mounting holes. The end of the base is provided with a base side hole. The base is hinged to the main rotating arm through the base side hole via the first main pin. The second main pin hinges the auxiliary rotating arm to the main rotating arm.

[0011] Preferably, the bottom of the base is provided with an adjustment screw hole, and an adjustment bolt is provided in the adjustment screw hole. The adjustment bolt abuts against the bottom of the main rotating arm for limiting the position.

[0012] Preferably, each end of the connecting rod is provided with a second mounting hole, and each second mounting hole is provided with a secondary pin; the base and the secondary rotating arm are respectively hinged to the main rotating arm through secondary pins located at both ends of the main rotating arm.

[0013] Preferably, the base is provided with base mounting holes.

[0014] Preferably, the auxiliary rotating arm is provided with an auxiliary rotating arm mounting hole.

[0015] The beneficial effects of this invention are:

[0016] 1. The present invention provides one or more sets of limiting rollers on the main rotating arm. By calculating and setting the relative positions of the limiting rollers, the roller assembly and the C-type torsion bar spring can cooperate to perform one or more limiting positions at the required limiting position of the back door.

[0017] 2. This invention achieves a compound rotational motion of the base and the auxiliary rotating arm by forming two rotational relationships between the main rotating arm and the base and the auxiliary rotating arm, and between the connecting rod and the base and the auxiliary rotating arm. This enables the door opening angle to reach more than 245°, meeting the large opening angle requirement of the double-opening tailgate.

[0018] 3. The present invention provides a C-type torsion bar spring on the base. By setting the pre-torsion angle of the C-type torsion bar spring, the spring elasticity and diameter can control the limiting force when the door is limited. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a perspective view of the invention from another angle;

[0021] Figure 3 This is a perspective view of the base of the present invention;

[0022] Figure 4 for Figure 3 An explosion effect diagram;

[0023] Figure 5 This is a perspective view of the base of the present invention without the installation of the limiting adhesive strip;

[0024] Figure 6 This is a perspective view of the main rotating arm of the present invention;

[0025] Figure 7 This is a three-dimensional view of the main rotating arm from another perspective.

[0026] Figure 8 This is a perspective view of the connecting rod of the present invention.

[0027] Figure label:

[0028] 1. Base, 11. Groove, 111. Mounting through hole, 12. Spring mounting hole, 13. Base side hole, 14. Base mounting hole, 15. Adjusting bolt, 16. Limiting rubber strip, 161. Rubber strip body, 162. Mounting post.

[0029] 2. Main rotating arm, 21. Base plate, 22. Side wall, 221. First mounting hole, 23. First main pin, 24. Second main pin.

[0030] 3 sets of rotating arms, 31 sets of rotating arm mounting holes,

[0031] 4 connecting rods, 41 second mounting hole, 42 auxiliary pin,

[0032] 5. Roller assembly, 51. Roller mounting plate, 52. Capped shaft, 53. Roller,

[0033] 6C type torsion bar spring. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects to be solved by 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 are not intended to limit the scope of this application.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] Example

[0041] like Figures 1-8The large-opening-angle self-limiting tailgate hinge shown includes a base 1 mounted on the vehicle body, with a base mounting hole 14 on the base 1. A main rotating arm 2 is hinged to the base 1, and a secondary rotating arm 3 is hinged to the other end of the main rotating arm 2, with a secondary rotating arm mounting hole 31 on the secondary rotating arm 3. The secondary rotating arm 3 is fixed to the tailgate. A cavity is formed in the middle of the main rotating arm 2, and a connecting rod 4 is provided in the cavity. The two ends of the connecting rod 4 are respectively hinged to the base 1 and the secondary rotating arm 3. A limiting roller assembly 5 is provided at the end of the main rotating arm 2 away from the secondary rotating arm 3. A C-type torsion bar spring 6 is provided on the base 1, and spring mounting holes 12 are formed on both sides of the base 1. The open end of the C-type torsion bar spring 6 is movably installed in the spring mounting hole 12. The tail end of the C-type torsion bar spring 6 movably abuts against the top of the limiting roller assembly 5. The limiting roller assembly 5 and the C-type torsion bar spring 6 limit the tailgate to one or more positions when opening and closing. The base 1 is provided with an adjustment screw hole, and an adjustment bolt 15 is provided in the adjustment screw hole. The adjustment bolt 15 abuts against the bottom of the main rotating arm 2 for limiting.

[0042] The limiting roller assembly 5 includes two spaced roller mounting plates 51. Three sets of roller assemblies are fixed on the inner sides of the two roller mounting plates 51. Each roller assembly includes two capped shafts 52 symmetrically arranged on the roller mounting plates 51. Rotating rollers 53 are mounted on the capped shafts 52, and adjacent rollers 53 mesh with each other. The base 1 has a groove 11 and multiple mounting through holes 111 located inside the groove 11. A limiting rubber strip 16 is installed at the end of the base 1. The limiting rubber strip 16 includes a strip body 161, and the strip body 161 has multiple mounting posts 162 that mate with the mounting through holes 111.

[0043] The main rotating arm 2 includes a base plate 21. The bottom of the base plate 21 has side walls 22 on both sides. The two ends of the side walls 22 have first mounting holes 221. A first main pin 23 is provided between two symmetrically arranged first mounting holes. A second main pin 24 is provided in the other two symmetrically arranged first mounting holes. The end of the base 1 has a base side hole 13. The base 1 is hinged to the main rotating arm 2 through the first main pin 23 passing through the base side hole 13. The second main pin 24 hinges the auxiliary rotating arm 3 to the main rotating arm 2.

[0044] Both ends of the connecting rod 4 are provided with second mounting holes 41, and each second mounting hole 41 is provided with a secondary pin 42; the base 1 and the secondary rotating arm 3 are respectively hinged to the main rotating arm 2 through the secondary pins 42 located at both ends of the main rotating arm 2.

[0045] The following describes the installation and operation process of this invention:

[0046] Assemble the large-opening-angle self-limiting tailgate hinge described in the above embodiment. Fix the base 1 to the vehicle body using bolts that align with the base mounting holes 14. Fix the secondary rotating arm 3 to the tailgate using bolts that align with the secondary rotating arm mounting holes 31. The three sets of roller assemblies are, from top to bottom, the first roller set, the second roller set, and the third roller set. When the door is closed, the tail end of the C-type torsion bar spring 6 abuts against the top of the first roller set, and the end of the adjusting bolt 15 abuts against the base plate 21.

[0047] Pull the tailgate. When the tailgate is pulled to 93°, the main rotating arm 2 rotates by 40°, and the tail end of the C-type torsion bar spring 6 slides between the first and second roller groups, achieving the first limit position of the door. Continue pulling the tailgate to 178°. At this time, the main rotating arm 2 rotates by 80°, and the tail end of the C-type torsion bar spring 6 slides between the second and third roller groups, achieving the second limit position of the door. Continue pulling the tailgate to 250°. At this time, the main rotating arm rotates by 120°, and the tail end of the C-type torsion bar spring 6 slides to the third roller group. At the same time, the tail end of the main rotating arm 2 abuts against the limiting rubber strip 16, achieving the third limit position.

[0048] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A self-limiting rear door hinge with a large opening angle, characterized in that: The system includes a base (1) mounted on the vehicle body, a main rotating arm (2) hinged to the base (1), and a secondary rotating arm (3) hinged to the other end of the main rotating arm (2). The secondary rotating arm (3) is fixed to the tailgate of the vehicle. A cavity is provided in the middle of the main rotating arm (2), and a connecting rod (4) is provided in the cavity. The two ends of the connecting rod (4) are respectively hinged to the base (1) and the secondary rotating arm (3). A limiting roller assembly (5) is provided at the end of the main rotating arm (2) away from the secondary rotating arm (3). A C-shaped torsion bar spring (6) is provided on the base (1). The end of the spring (6) is movably abutted against the top of the limiting roller assembly (5). The limiting roller assembly (5) and the C-type torsion bar spring (6) limit the opening and closing of the car tailgate by one or more positions. The limiting roller assembly (5) includes two roller mounting plates (51) spaced apart. Multiple sets of roller assemblies are fixed on the inner side of the two roller mounting plates (51). The roller assembly includes two capped shafts (52) symmetrically arranged on the roller mounting plates (51). Rotating rollers (53) are mounted on the capped shafts (52), and adjacent rollers (53) mesh with each other.

2. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The roller assembly consists of three sets.

3. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The base (1) has a groove (11) and a plurality of mounting through holes (111) located inside the groove (11); a limiting rubber strip (16) is installed at the end of the base (1), the limiting rubber strip (16) includes a rubber strip body (161), and the rubber strip body (161) has a plurality of mounting posts (162) that cooperate with the mounting through holes (111).

4. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The base (1) has spring mounting holes (12) on both sides, and the open end of the C-type torsion bar spring (6) is movably installed in the spring mounting holes (12).

5. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The main rotating arm (2) includes a base plate (21), and the bottom sides of the base plate (21) are provided with side walls (22). The two ends of the side walls (22) are provided with first mounting holes (221). A first main pin (23) is provided between the two symmetrically arranged first mounting holes, and a second main pin (24) is provided in the other two symmetrically arranged first mounting holes. The end of the base (1) is provided with a base side hole (13). The base (1) is hinged to the main rotating arm (2) through the first main pin (23) passing through the base side hole (13). The second main pin (24) hinges the auxiliary rotating arm (3) to the main rotating arm (2).

6. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The base (1) has an adjustment screw hole at its bottom, and an adjustment bolt (15) is provided in the adjustment screw hole. The adjustment bolt (15) abuts against the bottom of the main rotating arm (2) for limiting its position.

7. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The connecting rod (4) has a second mounting hole (41) at both ends, and a secondary pin (42) is provided in each of the second mounting holes (41); the base (1) and the secondary rotating arm (3) are respectively hinged to the main rotating arm (2) through the secondary pins (42) located at both ends of the main rotating arm (2).

8. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The base (1) is provided with a base mounting hole (14).

9. The large opening angle self-limiting rear door hinge according to claim 1, characterized in that: The auxiliary rotating arm (3) is provided with an auxiliary rotating arm mounting hole (31).

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