Hinge for tailgate

Abstract

The utility model discloses a tailgate hinge, tailgate hinge contains car body page board, tailgate page board, fixed bolster and integrated limiting hinge structure, integrated limiting hinge structure includes slotted pivot, elastic unit, roller pin and roller pin support, tailgate page board, car body page board and fixed bolster can rotatablely be equipped on slotted pivot, roller pin support is limited with fixed bolster and is equipped with roller pin hole, the roller pin is installed in the roller pin hole and is dynamically cooperated with the multiple recesses of slotted pivot, the elastic unit acts on the roller pin, when tailgate page board rotates, the roller pin realizes the conversion of interference fit and zero clearance fit under the drive of elastic unit between the multiple recesses of slotted pivot. Reach the effect that accurately and stably limit the tailgate rotation angle, reduce tailgate swing and improve tailgate use stability and durability.

Description

Technical Field

[0001] This utility model relates to a hinge, and more particularly to a hinge for a tailgate. Background Technology

[0002] With the advancement of technology, cars have become increasingly common, serving as a primary means of transportation. The tailgate hinge is a crucial automotive component. Current tailgate hinge technology features a simple structure and function, making it difficult to adapt to different car models and lacking the ability to control the angle at which the tailgate opens. Figure 1 As shown. Therefore, this invention provides a tailgate hinge to solve the problems mentioned above. Utility Model Content

[0003] In view of the problems of insufficient stability, low angle adjustment accuracy and complex structure of current tailgate hinges, this utility model provides an integrated limiting hinge for tailgates, which can realize multi-segment angle positioning, long-term stable opening and closing and compact integrated design of tailgates.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] A tailgate hinge includes a body panel, a tailgate panel, and an integrated limiting hinge structure. The integrated limiting hinge structure includes a fixed support, a slotted pivot, an elastic unit, needle rollers, and a needle roller bracket. The fixed support is fixedly connected to the tailgate panel. The needle roller bracket is limited to the fixed support and has needle roller holes. The needle rollers are installed in the needle roller holes and dynamically engage with multiple recesses of the slotted pivot. The body panel is connected to the slotted pivot through the limiting structure. The elastic unit acts between the needle rollers and the needle roller bracket. When the tailgate panel rotates, the needle rollers, driven by the elastic unit, switch between an interference fit and a zero-clearance fit between the multiple recesses of the slotted pivot.

[0006] According to one aspect of the present invention, the tailgate hinge further includes a limiting block, which is connected to the body panel for limiting and is connected to the slotted rotating shaft for limiting.

[0007] According to one aspect of this utility model, the elastic unit should be in close contact with the needle roller, and when the tailgate is opened, the elastic unit cooperates with the needle roller to make relative movements.

[0008] According to one aspect of this utility model, the limiting block is fixed parallel to the vehicle body panel, and its surface is provided with a stepped groove for forming a three-level limiting engagement with the protrusion of the slotted rotating shaft.

[0009] According to one aspect of this utility model, the elastic unit is a spring, whose preload drives the needle rollers to switch between interference fit and zero clearance fit in the recess of the slotted shaft.

[0010] According to one aspect of this utility model, the depth and radius of the recess of the slotted rotating shaft are equal to the diameter of the needle roller, so that the needle roller can switch between interference fit and zero clearance fit during movement.

[0011] According to one aspect of this utility model, the needle roller is radially positioned by the recess of the slotted rotating shaft, and axially limited by the snap-fit ​​structure of the needle roller bracket in conjunction with the elastic clamping force of the spring, and keeps the components coaxial.

[0012] According to one aspect of the present invention, the slotted shaft has twelve recesses evenly spaced around its circumference, the positions of which correspond to the needle holes of the needle roller holder, allowing the needle rollers to slide into them.

[0013] According to one aspect of this utility model, the tailgate hinge further includes a body fixing part, a first connecting part, a door fixing part, and a second connecting part. The body fixing part is fixed to the body; the door fixing part is fixed to the door; the first connecting part adopts a large-size U-shaped structure, and the second connecting part adopts a small-size U-shaped structure, with their opening directions opposite; the second connecting part is fixed by the snap-fit ​​action of the large-size U-shaped opening of the first connecting part, and at the same time, it cooperates with the limiter and the slotted rotating shaft to complete the rotation limit.

[0014] According to one aspect of the present invention, the fixed bracket further includes a fixed connecting part and a third connecting part, the fixed connecting part being fixedly connected to the second connecting part, and the third connecting part being mutually connected with the slotted rotating shaft, the spring, and the needle roller bracket.

[0015] Advantages of this utility model:

[0016] The above technical solution achieves the following results:

[0017] Precise limit and stable operation:

[0018] The multi-level limit structure ensures smooth and wobbly opening and closing of the tailgate, avoids abnormal noises, and improves the user experience.

[0019] The dynamic interference fit design ensures that the tailgate remains stable at different opening degrees, preventing accidental triggering or loosening.

[0020] Compact structure and high integration:

[0021] By integrating core components such as elastic units and needle rollers, the number of parts is reduced, the assembly process is simplified, and installation space is saved.

[0022] The needle rollers and the shaft are precisely matched, ensuring stable movement, reducing wear, and extending service life.

[0023] High efficiency, durability, and low maintenance requirements:

[0024] Elastic drive adaptive adjustment ensures smooth movement, reduces energy consumption, and improves durability.

[0025] The anti-loosening design reduces component loosening caused by long-term vibration, thus lowering the maintenance frequency.

[0026] Highly versatile and scalable:

[0027] Modular design adapts to different car models, reducing development costs.

[0028] Wear parts are easy to replace, maintenance is convenient, and after-sales efficiency is improved.

[0029] Security and user experience optimization:

[0030] Eliminate abnormal noises during operation, improve the quietness of tailgate operation, and enhance user satisfaction.

[0031] The lightweight design reduces weight while maintaining strength, meeting the requirements for lightweight design. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of a hinge product based on existing technology.

[0034] Figure 2 This is a schematic diagram of the structure of a car with a rotating tailgate according to the present invention;

[0035] Figure 3 This is an exploded view of the integrated limiting hinge of this utility model;

[0036] Figure 4 This is a schematic diagram of the limiter of this utility model;

[0037] Figure 5 This is a schematic diagram of the door closing mechanism of the integrated limiting hinge of this utility model;

[0038] Figure 6 This is a schematic diagram of the integrated limiting hinge of this utility model for rotating and opening. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this application and for 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 utility model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] like Figures 2 to 6 As shown, the tailgate integrated limiting hinge of this utility model consists of a body panel 11, a body panel 12, a fixed bracket 13, a limiting block 14, a slotted rotating shaft 15, a spring 16, a screw shaft 17, a needle roller 18, a needle roller bracket 19, a rivet 20, and a bushing 21.

[0043] Example 1

[0044] like Figure 3As shown, this utility model is a tailgate hinge, and more particularly a tailgate hinge. The tailgate hinge includes a body panel 11, a tailgate panel 12, a fixed bracket 13, and an integrated limiting hinge structure. The body panel 11 is fixedly connected to the body, the tailgate panel 12 is fixedly connected to the tailgate, and the tailgate panel 12 is fixedly connected to the fixed bracket 13. The body panel 11, tailgate panel 12, and fixed bracket 13 are all fitted onto the integrated limiting hinge structure and fixedly limited. The integrated limiting hinge structure includes a slotted rotating shaft 15, an elastic unit, a needle roller 18, and a needle roller bracket 19. The needle roller bracket 19 is limitedly fitted with the fixed bracket 13 and has a needle roller hole. The needle roller 18 is installed in the needle roller hole and dynamically fits with the recess of the slotted rotating shaft 15. The elastic unit acts on the needle roller 18. When the tailgate panel 12 rotates, the needle roller 18, driven by the elastic unit, achieves a conversion between an interference fit and a zero clearance fit with the recess.

[0045] In this embodiment, the components can be implemented using the following specific structures and materials: The body panel 11 can be made of Q235 steel plate with a thickness of 2-3mm, and is fixed to the tailgate mounting position of the body by welding. The tailgate panel 12 is made of steel plate with a thickness of 1.5-2mm, and is connected to the tailgate by multiple bolts. The fixing bracket 13 is made of aluminum alloy and is anodized to improve its corrosion resistance. The slotted shaft 15 is made of 40Cr alloy steel and is quenched and tempered to improve its hardness and wear resistance. The elastic unit is made of 65Mn spring steel, the needle roller 18 is made of GCr15 bearing steel, and the needle roller bracket 19 is made of PA66 engineering plastic and manufactured by injection molding.

[0046] In this embodiment, the following structure and materials may be used: the limiting block 14 is made of 45# steel, which is hardened by quenching to improve its hardness, and its surface is ground to ensure the smoothness of the mating surface with the slotted rotating shaft 15. The limiting block may be rectangular in shape, with a protrusion at one end that mates with the slotted rotating shaft 15. The size of the protrusion is slightly smaller than the size of the slot to facilitate installation and adjustment.

[0047] In this embodiment, the elastic unit can achieve close contact and relative movement in the following way: the spring part of the elastic unit adopts a high-precision winding process to ensure that the spring pitch is uniform and the coils are in close contact. One end of the spring abuts against the needle roller bracket 19, and the other end is connected to the fixed structure. When the needle roller 18 moves, the spring can be compressed or stretched with the movement of the needle roller to achieve relative movement.

[0048] In this embodiment, the specific structure is as follows: the limiting block 14 and the vehicle body panel 11 are fixed by two sets of parallel bolts to ensure parallelism. The depth and width of the stepped groove are precisely designed according to the dimensions of the protrusion of the slotted shaft 15, and the transition surface between adjacent grooves adopts a rounded corner transition to reduce stress concentration. When the protrusion of the slotted shaft 15 mates with the groove, it can smoothly transition from one groove to another, achieving different levels of limiting.

[0049] In this embodiment, the specific parameters of the spring 16 are as follows: the spring 16 is made of piano wire, and the mean diameter, outer diameter, and free height of the spring are calculated according to the overall design requirements of the hinge. The preload of the spring is achieved by adjusting the initial compression of the spring. Generally, the range of the preload is determined based on actual testing and design experience to ensure that the needle rollers can work normally under different working conditions.

[0050] In this embodiment, the groove of the slotted shaft 15 is machined using the following process: the groove of the slotted shaft 15 is precision machined using a CNC milling machine, and the depth and radius tolerances of the groove are controlled within a very small range to ensure the fitting accuracy with the needle roller 18. At the same time, the surface of the groove is polished to reduce the coefficient of friction and improve the smoothness of the needle roller movement.

[0051] In this embodiment, the specific implementation is as follows: the guide groove width of the slotted rotating shaft 15 is slightly larger than the diameter of the needle roller 18, ensuring smooth sliding of the needle roller while achieving radial positioning. The snap-fit ​​structure of the needle roller bracket 19 is designed as an elastic structure, which can firmly hold the needle roller 18 under the elastic force of the spring 16, preventing its axial movement. To ensure coaxiality, during the component assembly process, a special assembly fixture is used for positioning and installation to ensure that the central axes of each component coincide.

[0052] In this embodiment, the grooves are distributed as follows: the twelve grooves are evenly distributed circumferentially on the slotted shaft 15, with an included angle of 30 degrees between adjacent grooves. The starting and ending positions of the grooves are designed according to the opening and closing angle range of the tailgate to ensure that the needle rollers can accurately embed into the grooves throughout the entire opening and closing process, thus achieving the corresponding function.

[0053] In this embodiment, the vehicle body fixing part 111 is connected to the tailgate mounting bracket of the vehicle body by welding or bolting. The U-shaped first connecting part 112 of the vehicle body is made of high-strength steel plate by stamping, and its opening size is slightly larger than the corresponding size of the limiter 14 and the slotted rotating shaft 15, so as to facilitate assembly and at the same time provide sufficient limiting force during operation.

[0054] In this embodiment, the tailgate fixing part 121 is connected to the tailgate frame with multiple bolts to ensure a firm connection. The U-shaped second connecting part 122 is also made of high-strength steel plate and is connected to the fixing bracket 13 with bolts. Anti-loosening washers are provided at the bolt connection points to prevent loosening during long-term use.

[0055] In this embodiment, the rivet 20 has the following specifications: it is made of stainless steel, has a diameter of 5-6 mm, and its length is determined according to the thickness of the tailgate panel 12 and the fixing bracket 13. The head and tail of the rivet 20 are specially treated to increase friction and shear resistance, ensuring a firm connection.

[0056] In this embodiment, the upper connecting part 131 is connected to the second connecting part 122 by bolts, and the bolt tightening torque is subject to strict requirements. The lower connecting part 132 uses a combination of slots and bolts to fix the slotted rotating shaft 15, spring 16 and needle roller bracket 19 to the fixed bracket 13. The size of the slots is precisely matched with the corresponding components to ensure accurate installation.

[0057] In this embodiment, the upper connecting part 131 is connected to the second connecting part 122 by bolts, and the bolt tightening torque is subject to strict requirements. The lower connecting part 132 uses a combination of slots and bolts to fix the slotted rotating shaft 15, spring 16 and needle roller bracket 19 to the fixed bracket 13. The size of the slots is precisely matched with the corresponding components to ensure accurate installation.

[0058] In this embodiment, the bushing 21 is made of copper alloy and has an inner diameter slightly smaller than the diameter of the screw shaft 17. It is installed on the screw shaft 17 by interference fit. The length of the bushing 21 is determined according to the exposed length of the screw shaft 17, and is generally 1.1-1.2 times the exposed length of the screw shaft 17, to ensure that it can completely cover the easily worn parts of the screw shaft 17.

[0059] The beneficial effects of this embodiment are as follows:

[0060] Precise limit function:

[0061] Through a special limiting structure design, the rotation of the tailgate flap can be precisely limited. Whether the tailgate is opening or closing, it ensures that the tailgate stops accurately in the predetermined position, effectively avoiding damage or interference with other components that may be caused by excessive shaking or rotation.

[0062] The multi-level limit structure provides corresponding limit protection at different opening angles, improving the safety and stability of the tailgate movement.

[0063] Stable motion performance:

[0064] The components in the integrated limiting hinge structure fit together tightly, especially the fit between the needle roller and the slotted pivot, and between the elastic unit and the needle roller. This ensures stable movement during frequent opening and closing of the tailgate, reducing the possibility of component loosening or displacement due to vibration or impact.

[0065] This stable motion performance helps to extend the lifespan of the tailgate and reduce maintenance costs.

[0066] Good cushioning effect:

[0067] The elastic element allows the needle rollers to switch between an interference fit and a zero-clearance fit during their interaction with the slotted shaft, a characteristic that acts as a buffer. At the moment the tailgate opens or closes, it absorbs some energy, reducing the impact on the tailgate and vehicle body structure.

[0068] The cushioning effect helps improve the user's feel when operating the tailgate, making the tailgate opening and closing smoother and quieter.

[0069] Compact structural design:

[0070] This integrated limiting hinge has a compact structure and a rational layout of its components. By integrating multiple functional components, it reduces the overall space occupied. This is especially important for models that have high requirements for interior space and exterior styling.

[0071] The compact structural design also helps to simplify the assembly process and improve production efficiency.

[0072] High strength and durability:

[0073] Key components, such as the slotted pivot, needle rollers, and mounting brackets, are made of high-strength materials. These components can withstand the weight of the tailgate and the stress generated by frequent opening and closing, ensuring the reliability of the hinges during long-term use.

[0074] The connection methods and surface treatment processes between the components also enhance the overall durability and reduce the risk of failure caused by wear, corrosion and other factors.

[0075] Easy to install and maintain:

[0076] The overall structural design takes into account the ease of installation, and the connection between the various components is simple and clear, making it easy to assemble on the automobile production line.

[0077] In terms of maintenance, if a component is damaged, it can be replaced relatively easily, reducing the complexity and cost of repairs.

[0078] Example 2

[0079] The working principle or operation process in this embodiment is as follows:

[0080] When the tailgate rotates, the tailgate panel 12 drives the needle roller bracket 19 and the needle roller 18 to move.

[0081] The spring 16 (made of shape memory alloy) adjusts the preload according to the load, pushing the needle roller 18 to slide along the gradually curved groove of the slotted shaft 15.

[0082] When the needle roller enters the deep groove area (high load condition), an interference fit locking is achieved; in the shallow groove area (low load condition), it switches to a zero clearance fit to reduce resistance.

[0083] When the tailgate reaches the preset angle, the limiting block 14 (made of nylon) engages with the protrusion of the slotted pivot 15 in the corresponding groove, limiting the rotation range in stages (three-level limiting).

[0084] The torque sensor monitors the torque change of the screw shaft 17. If a loosening trend is detected, a warning signal is triggered to remind maintenance.

[0085] The grease in the guide groove is replenished periodically through the grease nipple of the fixed bracket 13, and the rolling friction is transformed into a combination of rolling and sliding friction, reducing energy consumption.

[0086] After the material improvement, the bimetallic structure of bushing 21 can quickly dissipate the heat generated by friction, preventing local temperature rise from affecting performance.

[0087] The difference between this embodiment and Embodiment 1 is that:

[0088] In this embodiment, the needle roller bracket 19 adopts a split design, consisting of two symmetrical semi-circular brackets, which are fixed by bolts, making it easy to assemble and replace the needle roller 18.

[0089] In this embodiment, the limiting block 14 is made of nylon and its surface is covered with a wear-resistant coating to reduce friction noise and reduce weight.

[0090] In this embodiment, the elastic unit is a memory alloy spring, which has adaptive stiffness characteristics and can dynamically adjust the preload according to the tailgate load.

[0091] In this embodiment, the groove shape of the slotted shaft 15 is optimized to a gradient arc surface, which makes the needle roller 18 smoother when transitioning between interference fit and zero clearance fit, and reduces impact.

[0092] In this embodiment, a lubrication channel is added inside the guide groove, and grease is replenished periodically through the grease nipple built into the fixed bracket 13 to further reduce friction loss.

[0093] In this embodiment, the vehicle body fixing part 111 is connected to the vehicle body with an elastic rubber pad to absorb vibration and reduce noise transmitted to the tailgate.

[0094] In this embodiment, the rivet 20 is replaced with a self-locking anti-loosening structure to prevent loosening caused by long-term vibration.

[0095] In this embodiment, a torque sensor is added to the end of the screw shaft 17 to monitor the locking status of the limit block 14 in real time and prevent it from loosening and failing.

[0096] In this embodiment, the bushing 21 adopts a bimetallic structure (outer layer stainless steel + inner layer copper alloy), which takes into account both wear resistance and thermal conductivity, and improves heat dissipation efficiency.

[0097] The beneficial effects of this embodiment are as follows:

[0098] The adaptive properties of shape memory alloy springs allow the hinges to dynamically adjust resistance based on the tailgate load (such as fully loaded or empty), improving the user experience.

[0099] The gradient groove design makes the needle roller movement smoother, reduces impact noise, and enhances comfort.

[0100] The combination of nylon limit blocks and wear-resistant coatings reduces friction loss and decreases replacement frequency.

[0101] The continuous lubrication of grease and the heat dissipation function of bimetallic bushings significantly improve the wear resistance of key components.

[0102] The torque sensor monitors the status of the limit block in real time, providing early warning of the risk of loosening and preventing accidental dislodgement.

[0103] The split-type needle roller support facilitates maintenance and reduces repair costs and time.

[0104] Nylon limit blocks and bimetallic bushings reduce weight while maintaining strength, contributing to the overall vehicle weight reduction goal.

[0105] Self-locking rivets and split needle roller brackets simplify the assembly process and improve production efficiency.

[0106] The integrated sensor design makes condition monitoring more intuitive and facilitates preventative maintenance.

[0107] The advantages of this utility model are as follows: The above-described solution achieves precise positioning and stable operation, improving the user experience; the modular integrated design optimizes the assembly process, reducing production costs and maintenance difficulty; high-strength wear-resistant materials and lightweight improvements extend the hinge's service life while meeting the vehicle's lightweight requirements and improving fuel economy. Furthermore, its compact structure, anti-loosening design, and intelligent lubrication system further ensure the hinge's reliability and durability under complex working conditions, meeting the vehicle's dual standards of safety and comfort.

[0108] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A tailgate hinge, the tailgate hinge comprising a body panel (11), a tailgate panel (12), a fixing bracket (13), and an integrated limiting hinge structure, characterized in that, The integrated limiting hinge structure includes a slotted pivot (15), an elastic unit, a needle roller (18), and a needle roller bracket (19). The tailgate panel (12), the body panel (11), and the fixed bracket (13) are rotatably mounted on the slotted pivot (15). The needle roller bracket (19) is limited to the fixed bracket (13) and has a needle roller hole. The needle roller (18) is installed in the needle roller hole and dynamically engages with multiple recesses of the slotted pivot (15). The elastic unit acts on the needle roller (18). When the tailgate panel (12) rotates, the needle roller (18) is driven by the elastic unit to switch between interference fit and zero clearance fit between multiple recesses of the slotted pivot (15).

2. The tailgate hinge according to claim 1, characterized in that, It also includes a limiting block (14), which is connected to the body panel (11) for limiting and is connected to the slotted rotating shaft (15) for limiting.

3. The tailgate hinge according to claim 2, characterized in that, The limiting block (14) is fixed parallel to the body panel (11), and its surface is provided with a stepped groove for forming a three-level limiting fit with the protrusion of the slotted rotating shaft (15).

4. The tailgate hinge according to claim 1, characterized in that, The elastic unit is in close contact with the needle roller (18). When the tailgate is opened, the elastic unit moves relative to the needle roller.

5. The tailgate hinge according to claim 4, characterized in that, The elastic unit is a spring (16), whose preload drives the needle roller (18) to switch between interference fit and zero clearance fit in the recess of the slotted shaft (15).

6. The tailgate hinge according to claim 1, characterized in that, The groove depth and radius of the slotted shaft (15) are equal to the diameter of the needle roller (18), so that the needle roller (18) achieves an interference fit during movement.

7. The tailgate hinge according to claim 5, characterized in that, The needle roller (18) is radially positioned by the recess of the slotted shaft (15), and the axial positioning is completed by the snap-fit ​​structure of the needle roller bracket (19) in conjunction with the elastic clamping force of the spring (16), and the components are kept coaxial.

8. The tailgate hinge according to claim 1, characterized in that, The slotted shaft (15) has twelve recesses evenly spaced around its circumference. The positions of the recesses correspond to the needle holes of the needle roller bracket (19), allowing the needle rollers (18) to slide into them.

9. The tailgate hinge according to claim 1, characterized in that, The tailgate hinge also includes a body fixing part (111), a first connecting part (112), a door fixing part (121), and a second connecting part (122). The body fixing part (111) is fixed to the body; the door fixing part (121) is fixed to the door; the first connecting part (112) adopts a large-size U-shaped structure, and the second connecting part (122) adopts a small-size U-shaped structure, with opposite opening directions; the second connecting part (122) is fixed by the snap-fit ​​action of the large-size U-shaped opening of the first connecting part (112), and at the same time, it cooperates with the limiting block (14) and the slotted rotating shaft (15) to complete the rotation limiting.

10. The tailgate hinge according to claim 1, characterized in that, The fixed bracket (13) further includes a fixed connecting part (131) and a third connecting part (132). The fixed connecting part (131) is fixedly connected to the second connecting part (122), and the third connecting part (132) is connected to the slotted rotating shaft (15), the spring (16) and the needle roller bracket (19).

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