Integrated limit function door hinge

Abstract

The utility model discloses a kind of integrated limit function door hinges, it includes: with the body part of fixed body, with the door part of connecting door, it further includes limiting shaft, the limiting shaft is riveted together after being passed through the via hole provided on door part and the pin shaft hole provided on body part, so that body part and door part realize relative rotation, by integrating the function of limit stop into hinge, both the function of hinge can be realized, and the function of limit stop can be realized, the arrangement and installation space of door limit stop are saved, make door design degree of freedom more flexible, it occupies small space, easy to install, production and maintenance cost are low, because limit angle can be according to hinge opening angle Multi-gear setting, according to the structure of door hinge, maximum 270 ° limit can be realized, while each gear position can provide 50-120Nm torque, not only suitable for ordinary car, but also can be adapted to commercial vehicle, heavy truck and other vehicle models.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a door hinge with integrated limit function. Background Technology

[0002] The core function of a car door hinge is to physically connect the door to the car body and provide the rotation axis required for door opening and closing. It must bear the entire weight of the door, ensuring that the door maintains a precise, smooth, and reliable movement trajectory during countless opening and closing cycles; it is the foundation of door safety and function. The main function of a door limiter is to provide a preset stopping position during door opening, typically 1-3 positions, and to prevent the door from opening too wide. This enhances ease of use, such as fixing the door opening angle in confined spaces, protecting the door and surrounding objects from impact damage, preventing excessive opening and collisions with walls, adjacent vehicles, etc., and to some extent assisting in controlling the speed and force of door closing.

[0003] The market prospects for car door hinges are closely linked to global automobile production (especially the robust growth of new energy vehicles) and the application trends of lightweight, high-strength materials (such as high-strength steel and aluminum alloys). With the development of electric vehicle platforms and increasingly stringent collision safety regulations, the demand for high-performance, lightweight, and highly durable hinges continues to grow. Supply chain stability, cost pressures, and the increasing car ownership rates in emerging markets are also driving the market, with suppliers in China and other regions gaining a larger market share due to their cost and manufacturing capabilities. Door limiters also benefit from the recovery in global automobile production and sales and the expansion of new energy vehicles. Consumers' increasing demands for driving experience and convenience are driving the demand for smoother, more precise, and more responsive high-quality door limiters. Material innovation (such as engineering plastics and composite material components) to reduce weight, lower costs, and improve durability is an important direction.

[0004] The "two-in-one" product, which integrates the functions of door hinges and door limiters into a single component, represents an innovative direction in automotive lightweighting and modular design. Currently, door hinges and door limiters on the market are essentially separate components, two parts with no connection between them. Merging components reduces the number of parts and installation space, which is particularly beneficial for new energy vehicles that prioritize battery space and range. Furthermore, a single module simplifies supply chain management, reduces logistics and assembly line labor hours, and aligns with OEMs' cost reduction goals.

[0005] For example, Chinese Patent CN 118434953 A discloses an automotive door hinge, including a first bracket and a second bracket selectively mounted to either a door or a vehicle body. A cam element, non-rotatably mounted to the second bracket, includes a cam surface adapted to engage with a cam follower non-rotatably housed within a first housing of the first bracket. An energy storage device stores and releases energy as the cam follower translates longitudinally within the first housing in a first direction and then longitudinally in a second direction opposite to the first direction. Relative rotation of the first bracket relative to the second bracket within a predetermined angular range causes longitudinal translation of the cam follower, wherein when the door is closed, the cam follower engages with the cam surface and translates longitudinally in the second direction, thereby releasing the energy stored by the energy storage device to assist in door closure. This technical solution uses a cam and spring system to trigger the spring to release stored energy when the door is closed to a predetermined angle. However, the above effect is achieved by the sliding friction between the cam follower and the inclined surface of the cam element. With long-term use, the energy transfer efficiency will decrease due to wear and the decay of the spring release force, and abnormal noise will occur. In actual data testing, the wear rate of the hinge structure is 60% higher than that of the split limiter in sand and dust tests. In this technical solution, the energy release is only triggered at an opening angle of 20°~35°. If the initial opening of the door is less than 20°, the auxiliary function will fail. The manual mentions that the maximum assistance of this technical solution is only 3.5J, which is difficult to push heavy doors.

[0006] For example, the integrated limiting hinge disclosed in Chinese Patent CN 114961469 A includes a limiting device, a rotating spindle, a hinge door leaf, and a hinge body leaf. The limiting device is located inside the hinge body leaf, and the hinge door leaf is sleeved through the rotating spindle and fixed by a nut. The hinge body leaf has cover plate grooves at the top and bottom. The limiting device includes an upper cover plate, a first butterfly spring, a ball retainer, a conical ball, a limiting block, a second butterfly spring, and a lower cover plate. This utility model of integrated limiting door hinge not only serves as the main connecting component between the car door and the car body, but also integrates the function of a door limiter, which can simultaneously provide a limiting force for the door opening at a certain angle. This eliminates the need for a traditional door limiter, saves space for the arrangement and installation of the door limiter, and makes the door design more flexible. It occupies little space, is easy to install, and has low production and maintenance costs. Although the integrated limiting hinge in this technical solution achieves multi-angle limiting function through the ball-limiting groove structure, the stress concentration at the point contact between the tapered ball and the limiting groove can easily lead to plastic deformation of the limiting groove or breakage of the ball after long-term use, resulting in failure of the overall structure. Furthermore, since the force balance of the double butterfly springs depends on precise pre-tightening, the dynamic interference of the door's own weight (such as parking on a slope) may disrupt the critical force for the ball to slide in / out, leading to limiting failure. After wear, the entire hinge needs to be disassembled and the limiting block replaced, resulting in higher maintenance costs.

[0007] For example, Chinese patent CN 111119628 A discloses an automotive side door hinge assembly, including a fixed side panel for connecting to the vehicle frame and a movable side panel that rotatably engages with the fixed side panel and connects to the vehicle door. A fixed limiting block is connected to the inner side of the fixed side panel, and a movable limiting block, which cooperates with the fixed limiting block to limit the rotation angle of the movable side panel, is connected to the inner side of the movable side panel. This hinge assembly uses two limiting blocks to limit the opening degree of the vehicle door, simplifying the hinge structure, eliminating the need for a separate limiter, reducing the number of hinge components, reducing the number of parts developed, saving assembly time on the limiter line, and saving production cycle time. In actual operation, because the fixed limiting block adopts a thin plate-shaped vertical protrusion design and the movable limiting block is a horizontally protruding block structure, the two directly and rigidly contact each other for limiting. When the car door is frequently opened and closed or subjected to external impact, stress concentration can easily lead to deformation or breakage of the stop block, resulting in low reliability over long-term use. The tooth surface is prone to wear due to long-term friction, leading to loss of gear shift feel or abnormal noise. When the internal elastic components and gear shift dial are damaged, the entire assembly needs to be disassembled, resulting in high repair costs. Summary of the Invention

[0008] Purpose of the utility model: To address the shortcomings of existing technologies, this utility model provides an integrated door hinge with a limiting function. By integrating the limiting function into the hinge, it achieves both the functions of a hinge and a limiting function, saving space for the arrangement and installation of door limiting devices, making door design more flexible. It occupies little space, is easy to install, and has low production and maintenance costs. Because the limiting angle can be set in multiple positions according to the hinge opening angle, the maximum limiting angle can reach 270° depending on the structure of the door hinge. At the same time, each position can provide a torque of 50-120Nm. It is not only suitable for ordinary passenger cars, but also for commercial vehicles, heavy trucks, and other models.

[0009] Technical solution: In order to achieve the above objectives, the present invention provides an integrated limiting function door hinge, which includes: a body part fixed to the body, a door part connected to the door, and a limiting shaft. The limiting shaft passes through a through hole provided on the door part and a pin hole provided on the body part, and then rivets the door part and the limiting shaft together, so that the body part and the door part can rotate relative to each other.

[0010] The inner wall of the pin hole is provided with a pair of limiting grooves and assembly grooves. The limiting shaft passing through the pin hole is provided with multiple spring mounting grooves radially. The limiting spring is passed through the spring mounting groove. The two ends of the limiting spring are respectively provided with limiting balls. The limiting shaft rotates in the pin hole, driving the limiting balls to compress the limiting spring. After that, the balls roll in the spring mounting groove and the limiting groove or assembly groove to achieve gear adjustment.

[0011] As a further preferred embodiment of this utility model, a limiting shaft with pin riveting holes at both ends is inserted into the pin holes, and the pins located above and below the limiting shaft respectively rivet the countersunk holes and through holes at both ends of the limiting shaft together.

[0012] As the main rotation axis of the hinge, a countersunk hole is provided at the end as a pin riveting hole for later riveting with the pin. Two sealing ring mounting grooves are provided on the upper and lower sides, with the upper groove being larger than the lower one. The upper groove is used to install the upper sealing ring, and the lower groove is used to install the lower sealing ring. Three through holes are provided in the middle for later installation of a limit spring.

[0013] As a further preferred embodiment of this utility model, the limiting groove and the assembly groove are curved surface structures on the inner wall of the pin hole, forming a variable spring extension space to create multiple torque levels, thereby achieving the effect of limiting the door at various angles during the opening and closing process.

[0014] As a further preferred embodiment of this utility model, six limiting grooves and two assembly grooves are evenly arranged in the pin riveting hole. The two assembly grooves are on the same axis. Since each limiting groove has a steep slope and a deep depth, the compression of the ball compression spring is large during the rotation of the limiting shaft assembly. At this time, the limiting torque of each position increases. The torque of each limiting position can be controlled by adjusting the structure, slope and depth of each limiting groove.

[0015] As a further preferred embodiment of this utility model, the assembly groove is at the 0° position, and the other limiting grooves are respectively set at the 45°, 90° and 135° positions. The specific limiting angle can be set according to actual needs and hinge type, with a maximum limiting angle of 270°.

[0016] As a further preferred embodiment of this utility model, the limiting shaft is provided with two sealing ring mounting grooves, an upper sealing ring and a lower sealing ring respectively fitted into the upper and lower sealing ring mounting grooves. The size of the upper sealing ring mounting groove is larger than that of the lower sealing ring mounting groove, which plays a sealing role and prevents the grease inside the two sealing rings from overflowing, so as to ensure the reliability of the structural seal.

[0017] As a further preferred embodiment of this utility model, a bushing is provided at the abutting position of the outer end face of the pin hole and the outer end face of the through hole. By placing the bushing in the middle of the body part and the door part, it plays a role in wear resistance and lubrication.

[0018] As a further preferred embodiment of this utility model, the pin has a stepped structure, with both the upper and lower steps having a knurled structure.

[0019] Beneficial effects: Compared with the prior art, the integrated limiting function door hinge of this utility model has the following advantages:

[0020] (1) By combining the hinge and the limiter into one, the overall structure is simple and the vehicle is easy to install, which can effectively reduce production costs and management costs.

[0021] (2) By combining the hinge and the limiter into one, the ordinary limiter can be eliminated, which can effectively save layout and assembly space. At the same time, the overall strength of the hinge is strengthened, providing greater freedom for the configuration of the whole vehicle.

[0022] (3) Multiple positions can be set according to different hinge forms, and a maximum limit of 270° can be achieved, making it more flexible in application and more compatible with vehicles.

[0023] (4) By combining the hinge and limiter into one, it can provide a super-large limit torque of 50-120Nm, which is not only suitable for ordinary cars, but also for commercial vehicles, heavy trucks and other models.

[0024] (5) By combining the hinge and the limiter into one, the mechanical limit structure and limit block of the ordinary hinge can be eliminated because it can provide a strong limiting effect.

[0025] (6) By combining the hinge and the limiter into one, the built-in limiter component can avoid the corrosion of the core parts. Compared with the plastic structure of conventional limiters, it can greatly reduce the risk of weathering, cracking and abnormal noise, improve the efficiency of use and reduce maintenance costs.

[0026] (7) By combining the hinge and the limiter into one, the built-in limit structure is a high-strength rigid body with extremely high hardness and wear resistance, resulting in a better service life.

[0027] (8) By combining the hinge and the limiter into one, the entire limit shaft is filled with grease, which has a good lubricating effect and can effectively reduce abnormal noise during rotation. In addition, the upper and lower ends of the limit shaft are equipped with sealing rings, and the entire cavity has a strong sealing effect, which can effectively prevent grease leakage. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model after installation;

[0029] Figure 2 This is an exploded view of the present invention;

[0030] Figure 3 This is a top view of the completed installation of this utility model;

[0031] Figure 4 This is a partial sectional view of the present invention after installation;

[0032] Figure 5 This is the front view of the limiting axis;

[0033] Figure 6 This is a full sectional view of the limiting shaft. Detailed Implementation

[0034] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the integrated limiting function door hinge of this utility model includes: a body part 1, a door part 2, a limiting shaft 3, a limiting spring 4, a limiting ball 5, a sealing ring 6, a sealing ring 7, a bushing 8, and a pin 9. The body part 1 is fixed to the body, the door part 2 is connected to the door, and the limiting shaft 3 passes through the through hole 20 provided on the door part 2 and the pin hole 10 provided on the body part 1 to rivet the door part 2 and the limiting shaft 3 together, so that the body part 1 and the door part 2 can rotate relative to each other.

[0036] like Figure 5 , Figure 6 As shown, the limiting groove 101 and the assembly groove 102 are arranged in pairs on the inner wall of the pin hole 10. The limiting groove 101 and the assembly groove 102 are curved surface structures on the inner wall of the pin hole 10. A plurality of spring mounting grooves 31 are radially provided on the limiting shaft 3 passing through the pin hole 10. A limiting spring 4 passes through the spring mounting groove 31. A limiting ball 5 is provided at both ends of the limiting spring 4. The limiting shaft 3 rotates in the pin hole 10, which drives the limiting ball 5 to compress the limiting spring 4. After compression, the ball 4 rolls in the spring mounting groove 31 and the limiting groove 101 or the assembly groove 102 to achieve gear adjustment.

[0037] The limiting shaft 3, which has pin riveting holes 33 at both ends, passes through the pin hole 10. The pins 9 located above and below the limiting shaft 3 respectively rivet the countersunk holes and through holes 20 at both ends of the limiting shaft 3 together. Example

[0038] Step 1: Apply a layer of special grease evenly to the surfaces of the limiting groove 101 and the assembly groove 102 inside the pin hole 10 on the body part 1.

[0039] Step 2: Install the upper sealing ring 6 and the lower sealing ring 7 into the sealing ring mounting groove 32 on the limiting shaft 3, respectively;

[0040] Step 3: Inject grease into the spring mounting groove 31 of the limiting shaft 3, install the limiting spring 4 into the spring mounting groove 31, and install the limiting tube ball 5 on both sides of the limiting spring 4. At this time, the limiting spring 4 is in a free state, causing the ball 5 to protrude out of the outer diameter of the limiting shaft 3. Then, use the ball spring compression sleeve to compress the ball 5 into the limiting shaft 3 so that the limiting spring 4 is in a compressed state.

[0041] Step 4: Install the above assembly into the pin hole 10 of the body part 1 to form the body part assembly;

[0042] Step 5: Assemble door component 2 onto the body assembly;

[0043] Step 6: Assemble bushing 8 into the reserved space between body part 1 and door part 2, and install one bushing on each of the upper and lower end faces of pin hole 10.

[0044] Step 7: Rivet the pin 9 to the limiting shaft 3 in the door component 2 and body component 1 assembly. At this time, the door component 2 and the limiting shaft 3 are a whole and can rotate at the same time.

[0045] When the door rotates, it causes the door component 2 to rotate, which in turn causes the limiting shaft 3 to rotate the assembly groove 102 to the hinge closed state, i.e., the 0° position. This position is between the door closing angle tolerance and the need for easy installation, so the assembly groove has a gentle slope and shallow depth.

[0046] The door component 2 drives the limiting shaft 3 to rotate to various limiting positions of the limiting groove 101. When the limiting shaft 3 rotates to the limiting groove 101A position, it is a 45° limiting position; when the limiting shaft 3 rotates to the limiting groove 101B position, it is a 90° limiting position; and when the limiting shaft 3 rotates to the limiting groove 101C position, it is a 135° limiting position. The specific limiting angle is set according to the relevant requirements and the hinge type, and the maximum rotation angle is a 270° limiting position.

[0047] The limiting groove 101 has a steep slope and a deep depth, so that the limiting ball 5 can be inserted into the limiting groove 101 under the pressure of the limiting spring 4, thus ensuring the limiting function.

[0048] Because the slope of each limiting groove 101 is steep and the depth is deep, the compression of the limiting ball 5 to the limiting spring 4 is large during the rotation of the limiting shaft assembly. At this time, the limiting torque of each position increases. Therefore, the torque of each limiting position is controlled by adjusting the slope and depth of each limiting groove 101.

[0049] The deeper the limiting groove 101, the greater the resistance overcome by the limiting spring 4 and the ball bearing 5, and the greater the limiting torque; conversely, the shallower the groove, the smaller the limiting torque. Similarly, the gentler the slope of the limiting groove 101, the less resistance overcome by the limiting spring 4 and the ball bearing 5, and the smaller the limiting torque; conversely, the steeper the slope, the greater the limiting torque. Considering the different designs, weights, required torques, and hinge types of the vehicle body and doors, the limiting groove 101 is adjusted to meet different requirements in terms of its depth and slope. All other components are standard parts.

[0050] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A door hinge with integrated limit function, comprising: A body part (1) fixed to the body and a door part (2) connected to the door are characterized in that they further include a limiting shaft (3), wherein the limiting shaft (3) passes through a through hole (20) provided on the door part (2) and a pin hole (10) provided on the body part (1) and then rivets the door part (2) and the limiting shaft (3) together, so that the body part (1) and the door part (2) can rotate relative to each other; The inner wall of the pin hole (10) is provided with a pair of limiting grooves (101) and assembly grooves (102). A plurality of spring mounting grooves (31) are provided radially on the limiting shaft (3) that passes through the pin hole (10). A limiting spring (4) is passed through the spring mounting groove (31). Limiting balls (5) are provided at both ends of the limiting spring (4). The limiting shaft (3) rotates in the pin hole (10) to drive the limiting balls (5) to compress the limiting spring (4). Then, the limiting ball (5) rolls in the spring mounting groove (31) and the limiting groove (101) or the assembly groove (102) to achieve gear adjustment.

2. The door hinge with integrated limiting function according to claim 1, characterized in that: The limiting shaft (3) with pin rivet holes (33) at both ends is inserted into the pin hole (10). The pins (9) located above and below the limiting shaft (3) respectively rivet the countersunk holes and through holes (20) at both ends of the limiting shaft (3).

3. A door hinge with integrated limiting function according to claim 1, characterized in that: The limiting groove (101) and assembly groove (102) are curved surface structures on the inner wall of the pin hole (10).

4. A door hinge with integrated limiting function according to claim 1, characterized in that: The pin riveting hole (33) is provided with 6 limiting grooves (101) and 2 assembly grooves (102) evenly arranged, and the 2 assembly grooves (102) are on the same axis.

5. A door hinge with integrated limiting function according to claim 4, characterized in that: The assembly slot (102) is at the 0° position, and the other limiting slots (101) are respectively set at the 45°, 90° and 135° positions.

6. A door hinge with integrated limiting function according to claim 1, characterized in that: The limiting shaft (3) is provided with two sealing ring mounting grooves (32), and the upper sealing ring (6) and the lower sealing ring (7) are respectively fitted into the upper and lower sealing ring mounting grooves (32).

7. A door hinge with integrated limiting function according to claim 6, characterized in that: The upper sealing ring mounting groove (32) is larger than the lower sealing ring mounting groove (32).

8. A door hinge with integrated limiting function according to claim 1, characterized in that: A bushing (8) is provided at the abutting position between the outer end face of the pin hole (10) and the outer end face of the through hole (20).

9. A door hinge with integrated limiting function according to claim 1, characterized in that: The pin (9) is a stepped structure, with knurled structure on both the upper and lower steps.

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