Self-limiting automobile side opening door hinge

Abstract

The utility model discloses a self-limiting automobile side-opening door hinge which comprises an internal connecting shaft which is fixedly installed in a main body support and is provided with an oil guide groove and an oil storage box so that oil can be evenly smeared at the upper end of a high-strength anti-abrasion ball under the action of gravity. High-strength anti-abrasion balls are installed, so that the abrasion resistance of the device can be enhanced, the contact area between the rotating support and the internal connecting shaft is reduced, then abrasion of the rotating support and the internal connecting shaft is reduced, and the situation that after the device is used for a long time, parts in the device are abraded, the device generates abnormal sound in the using process, and then the use experience of the device is affected is avoided; and meanwhile, when the high-strength anti-abrasion balls roll, oil liquid can be evenly smeared between the rotary support and the internal connecting shaft, so that the interior of the device can be automatically oiled when the device is rotationally opened and closed, the oiling difficulty of the device is reduced, and the interior of the device can be effectively lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile side door hinges, and particularly relates to a self-limiting automobile side door hinge. Background Technique

[0002] With the continuous development of society and the continuous improvement of people's living standards, more and more people buy cars, which in turn leads to a large demand for automobile side door hinges in automobile parts. The automobile side door hinge is an important component connecting the car door and the vehicle body, and it allows the car door to open and close smoothly. The automobile side door hinge enables the car door to rotate around a fixed point (hinge axis) through its mechanical structure, thereby realizing the opening and closing of the car door. This design makes the operation of the car door smooth, and at the same time ensures the sealing and safety of the car door;

[0003] The existing self-limiting car door hinge has a complex structure and a large volume. Due to the large number of product parts, complex structure, and heavy weight of this structure.

[0004] For example, the Chinese authorized patent with the publication number of CN208473519U (a self-limiting hinge for a rotating side door of an automobile): For this self-limiting hinge for a rotating side door of an automobile, when the car door is opened and closed, the limit pin slides on the body side hinge under the action of spring pressure, and the limit pin cooperates with the pit at the front shaft end of the body side hinge seat during sliding for limiting. This self-limiting hinge for a rotating side door of an automobile has high assembly efficiency, and the reduction of parts is beneficial to reducing costs and weights. This technical solution solves the above problems;

[0005] However, there are still some technical problems in the technical solution of this utility model. When the automobile side door hinge is used for a long time, the parts in the automobile side door hinge rub frequently, resulting in wear of the parts of the automobile side door hinge, and then causing abnormal noises when the automobile side door hinge is used, which in turn affects the use experience of the automobile side door hinge. At the same time, in order to prevent sundries from entering the interior of the automobile side door hinge, the gaps between the parts of the automobile side door hinge are small, resulting in inconvenience when applying lubricating oil during later maintenance of the automobile side door hinge, and the interior of the automobile side door hinge cannot be effectively lubricated.

[0006] Therefore, a self-limiting automobile side door hinge is proposed. Content of the Utility Model

[0007] The purpose of the present utility model is to provide a self-limiting hinge for the side door of an automobile, so as to solve the problems raised in the above-mentioned background technology. During long-term use of the hinge for the side door of an automobile, the components in the hinge for the side door of the automobile frequently rub against each other, resulting in wear of the parts of the hinge for the side door of the automobile. Furthermore, abnormal noises will occur when the hinge for the side door of the automobile is in use, which will affect the user experience of the hinge for the side door of the automobile. At the same time, in order to prevent sundries from entering the interior of the hinge for the side door of the automobile, the gaps between the parts of the hinge for the side door of the automobile are relatively small, resulting in inconvenience when applying lubricating oil during later maintenance of the hinge for the side door of the automobile, and the interior of the hinge for the side door of the automobile cannot be effectively lubricated.

[0008] To achieve the above object, the present utility model provides the following technical solution: A self-limiting hinge for the side door of an automobile, including a main body bracket:

[0009] An internal connecting shaft, which is fixedly installed inside the main body bracket. The upper end of the outer part of the internal connecting shaft is rotatably installed with a rotating bracket through a card slot. An oil guiding groove is arranged inside the upper end of the internal connecting shaft. A number of high-strength anti-wear balls are annularly arranged on one side of the inner part of the oil guiding groove close to the outer wall of the internal connecting shaft. A number of the high-strength anti-wear balls and the internal connecting shaft are rotatably connected through card slots. The upper end of the internal connecting shaft is installed with an oil storage box through threads. A number of oil scraping cloth plates are annularly arranged on the outer part of the internal connecting shaft through card slots;

[0010] A body fixed installation bracket, which is arranged on one side of the main body bracket. The upper end of the side of the body fixed installation bracket close to the main body bracket is fixedly installed with a limit strengthening bracket, and the limit strengthening bracket is rotatably connected with the rotating bracket;

[0011] A fixed boss, which is fixedly installed at the upper end of the outside of the main body bracket. A number of upper top screws are annularly arranged at the lower end of the fixed boss through threads. The lower end of the outside of the rotating bracket is installed with a bottom dust-proof boss through threads;

[0012] A matching spherical boss, which is annularly arranged on the upper end surface of the main body bracket. There are six matching spherical bosses. Wear-resistant replacement parts are installed at both the front and rear ends of the upper end surface of the main body bracket. There are two wear-resistant replacement parts. Three matching ball grooves are arranged at the lower ends of the two wear-resistant replacement parts. The matching ball grooves and the matching spherical bosses are matched through card slots. Two annular matching grooves are arranged at the upper ends of the wear-resistant replacement parts. The annular matching grooves and the lower end of the rotating bracket are rotatably connected through card slots.

[0013] Preferably, a flexible anti-backflow thin sheet is installed inside the lower end of the oil storage box. The flexible anti-backflow thin sheet is fixedly connected with the oil storage box, and there are two flexible anti-backflow thin sheets.

[0014] Preferably, a filter screen is installed inside the oil storage box, and the filter screen is connected to the oil storage box through a card slot.

[0015] Preferably, an oil filling cap is installed at the upper end of the oil storage box, and the oil storage box is threadedly connected to the oil filling cap.

[0016] Preferably, a downward pressure spring is installed inside one side of the lower end of the rotating bracket. The downward pressure spring is fixedly connected to the rotating bracket. The lower end of the downward pressure spring is fixedly installed with a lower position clamping shaft. The lower position clamping shaft is fixedly connected to the downward pressure spring. The lower end of the lower position clamping shaft is provided with a ball head structure. Three limit ball grooves are provided at the upper ends of the two wear-resistant replacement parts. The lower end of the lower position clamping shaft is connected to the limit ball groove through a card slot in a matching manner.

[0017] Preferably, an automobile door mounting bracket is installed outside the rotating bracket, and the automobile door mounting bracket is welded to the rotating bracket.

[0018] Preferably, a top dust-proof boss is installed at the lower end outside the oil storage box, and the oil storage box is welded to the top dust-proof boss.

[0019] Preferably, the mating spherical boss and the main body bracket are integrally formed, and the vehicle body fixed mounting bracket is welded to the main body bracket.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. By providing an oil guide groove and an oil storage box, the present utility model can evenly apply the oil liquid on the upper end of the high-strength anti-wear rolling balls under the action of gravity, lubricate the high-strength anti-wear rolling balls, and thus extend the service life of the device. Installing the high-strength anti-wear rolling balls can enhance the wear resistance of the device, convert the sliding friction between the rotating bracket and the internal connecting shafts into rolling friction, reduce the contact area between the rotating bracket and the internal connecting shafts, and thus reduce the wear between the rotating bracket and the internal connecting shafts, enabling the rotating bracket and the internal connecting shafts to have a longer service life. It can prevent the parts in the device from wearing during long-term use, resulting in abnormal noises during the use of the device and affecting the use experience of the device. At the same time, when the high-strength anti-wear rolling balls roll, they will evenly apply the oil liquid between the rotating bracket and the internal connecting shafts, enabling the device to automatically perform an oiling operation inside the device when rotating and opening and closing, making the device more convenient to use, reducing the difficulty of oiling the device, enhancing the use effect of the device, and effectively lubricating the inside of the device;

[0022] 2. The utility model can scrape the oil by installing an oil scraping cloth plate, so that the oil is evenly smeared between the rotating bracket and the internal connecting shaft, enhancing the automatic oiling effect of the device. Installing a limit strengthening bracket can increase the strength of the device, prevent the device from tilting, improve the service life of the device. Installing an upper jack screw can jack up the bottom dust-proof boss, and then make the rotating bracket move upward, facilitating the staff to remove the wear-resistant replacement part. Thus, when the staff replaces the wear-resistant replacement part, it is not necessary to disassemble the car door, making the device maintenance more convenient, reducing the later maintenance difficulty of the device, enhancing the use effect of the device, and making the device more user-friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional stereogram of a self-limiting automotive side-opening hinge of the present utility model;

[0024] Figure 2 is an exploded view of the structure of a self-limiting automotive side-opening hinge of the present utility model;

[0025] Figure 3 is a schematic diagram of the internal structure of a self-limiting automotive side-opening hinge of the present utility model;

[0026] Figure 4 is a position distribution diagram of the present utility model in cooperation with the spherical boss at the upper end of the fixed boss;

[0027] Figure 5 is Figure 3 the enlarged view of part A in

[0028] Figure 6 is a position distribution diagram of the annular mating groove and the limit ball groove at the upper end of the wear-resistant replacement part of the present utility model;

[0029] Figure 7 is a schematic diagram of the structure of the flexible anti-backflow sheet of the present utility model;

[0030] Figure 8 is a position distribution diagram of the mating ball groove at the lower end of the wear-resistant replacement part of the present utility model.

[0031] In the figure: 1. Main body bracket; 2. Internal connecting shaft; 3. Body fixed mounting bracket; 4. Rotating bracket; 5. Oil storage box; 6. Oil filling cap; 7. Automobile door mounting bracket; 8. Limit strengthening bracket; 9. Top dust-proof boss; 10. Bottom dust-proof boss; 11. Fixed boss; 12. Upper jack screw; 13. High-strength anti-wear ball; 14. Oil scraping cloth plate; 15. Wear-resistant replacement part; 16. Oil guiding groove; 17. Filter screen; 18. Flexible anti-backflow sheet; 19. Mating spherical boss; 20. Pressing spring; 21. Lower position clamping shaft; 22. Mating ball groove; 23. Annular mating groove; 24. Limit ball groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0033] Please refer to Figure 1-8 , an embodiment provided by the present utility model: a self-limiting automobile side-opening hinge, including a main body bracket 1:

[0034] An internal connecting shaft 2, which is fixedly installed inside the main body bracket 1. The upper end outside the internal connecting shaft 2 is rotatably installed with a rotating bracket 4 through a card slot. An oil guide groove 16 is arranged inside the upper end of the internal connecting shaft 2. The arrangement of the oil guide groove 16 and the oil storage box 5 enables the oil liquid to be evenly smeared on the upper end of the high-strength anti-wear ball 13 under the action of gravity, lubricating the high-strength anti-wear ball 13, thereby extending the service life of the device. Thirty high-strength anti-wear balls 13 are annularly arranged on one side of the inner wall of the oil guide groove 16 close to the outer wall of the internal connecting shaft 2. Installing the high-strength anti-wear balls 13 can enhance the wear resistance of the device, convert the sliding friction between the rotating bracket 4 and the internal connecting shaft 2 into rolling friction, reduce the contact area between the rotating bracket 4 and the internal connecting shaft 2, thereby reducing the wear of the rotating bracket 4 and the internal connecting shaft 2, enabling the rotating bracket 4 and the internal connecting shaft 2 to have a longer service life, avoiding the parts in the device from wearing due to long-term use, resulting in abnormal noises during the use of the device, and thus affecting the use experience of the device. At the same time, when the high-strength anti-wear balls 13 roll, they will evenly smear the oil liquid between the rotating bracket 4 and the internal connecting shaft 2, enabling the device to automatically perform an oiling operation inside the device when rotating and opening and closing, making the device more convenient to use, reducing the difficulty of oiling the device, enhancing the use effect of the device, and enabling the inside of the device to be effectively lubricated. The thirty high-strength anti-wear balls 13 and the internal connecting shaft 2 are all rotatably connected through card slots. The upper end of the internal connecting shaft 2 is installed with an oil storage box 5 through threads. Six oil scraping cloth plates 14 are annularly arranged outside the internal connecting shaft 2 through card slots. Installing the oil scraping cloth plates 14 can scrape and smear the oil liquid, making the oil liquid evenly smeared between the rotating bracket 4 and the internal connecting shaft 2, enhancing the effect of automatic oiling of the device;

[0035] A vehicle body fixed installation bracket 3, which is arranged on one side of the main body bracket 1. A limit strengthening bracket 8 is fixedly installed at the upper end of the vehicle body fixed installation bracket 3 close to the main body bracket 1. The limit strengthening bracket 8 is rotatably connected to the rotating bracket 4. Installing the limit strengthening bracket 8 can increase the strength of the device, prevent the device from skewing, and improve the service life of the device;

[0036] The fixed boss 11 is fixedly installed at the upper end outside the main body bracket 1. Three upper jacking screws 12 are arranged in a threaded annular array at the lower end of the fixed boss 11. Installing the upper jacking screws 12 can jack up the bottom dust-proof boss 10 upward, so that the rotating bracket 4 moves upward, facilitating the staff to remove the wear-resistant replacement part 15. Thus, when the staff replaces the wear-resistant replacement part 15, it is not necessary to disassemble the car door, making the device maintenance more convenient, reducing the later maintenance difficulty of the device, enhancing the use effect of the device, making the device more user-friendly. The bottom dust-proof boss 10 is installed at the lower end outside the rotating bracket 4 through threads;

[0037] The mating spherical boss 19 is arranged in an annular array on the upper end surface of the main body bracket 1. There are six mating spherical bosses 19. Wear-resistant replacement parts 15 are installed at both the front and rear ends of the upper end surface of the main body bracket 1. There are two wear-resistant replacement parts 15. Three mating ball grooves 22 are arranged at the lower ends of the two wear-resistant replacement parts 15. Setting the mating ball grooves 22 and the mating spherical bosses 19 can make it more convenient for the staff to install the wear-resistant replacement parts 15. The cooperation between the mating ball grooves 22 and the mating spherical bosses 19 can make the wear-resistant replacement parts 15 automatically perform positioning cooperation with the main body bracket 1, enhancing the convenience of device maintenance. The mating ball grooves 22 and the mating spherical bosses 19 are in cooperation through card slots. Two annular mating grooves 23 are arranged at the upper ends of the wear-resistant replacement parts 15. The annular mating grooves 23 and the lower end of the rotating bracket 4 are rotationally connected through card slots.

[0038] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8, a flexible anti-backflow thin sheet 18 is installed inside the lower end of the oil storage box 5. The flexible anti-backflow thin sheet 18 is fixedly connected to the oil storage box 5. There are two flexible anti-backflow thin sheets 18. Installing the flexible anti-backflow thin sheet 18 can prevent the lubricating fluid from flowing back when the device is shaken, enhancing the practicality of the device. A filter net 17 is installed inside the oil storage box 5. The filter net 17 is connected to the oil storage box 5 through a card slot. An oil injection cap 6 is installed at the upper end of the oil storage box 5. The oil storage box 5 and the oil injection cap 6 are connected by threads. A downward pressure spring 20 is installed inside one side of the lower end of the rotating bracket 4. Installing the downward pressure spring 20 can push the lower position clamping shaft 21 downward, so that when the device rotates a certain angle, the lower position clamping shaft 21 cooperates with the limit ball groove 24, and then the car door is self-limited, ensuring the integrity of the device's functionality. When the user continues to push the car door, the lower position clamping shaft 21 and the limit ball groove 24 are mutually extruded, causing the lower position clamping shaft 21 to retract into the interior of the rotating bracket 4 against the elastic force of the downward pressure spring 20. Thus, a limit resistance is generated every time the device rotates a certain angle, enhancing the use effect of the device. The downward pressure spring 20 is fixedly connected to the rotating bracket 4. The lower end of the downward pressure spring 20 is fixedly installed with the lower position clamping shaft 21. The lower position clamping shaft 21 is fixedly connected to the downward pressure spring 20. The lower end of the lower position clamping shaft 21 is set as a ball head structure. Three limit ball grooves 24 are provided at the upper ends of both wear-resistant replacement parts 15. The lower end of the lower position clamping shaft 21 is connected to the limit ball groove 24 through a card slot. An automobile door mounting bracket 7 is installed outside the rotating bracket 4. The automobile door mounting bracket 7 is welded to the rotating bracket 4. A top dust-proof convex platform 9 is installed at the lower end outside the oil storage box 5. The oil storage box 5 and the top dust-proof convex platform 9 are welded together. The mating spherical convex platform 19 and the main body bracket 1 are integrally formed. The vehicle body fixed mounting bracket 3 is welded to the main body bracket 1.

[0039] Working principle: When in use, the staff installs this device inside the car door frame, installs the car door on the car door mounting bracket 7, installs the user's oil storage box 5 on the upper end of the internal connecting shaft 2, adds lubricating oil into the internal of the oil storage box 5, and then installs the oil filling cap 6 on the upper end of the oil storage box 5. Whenever the user pushes the car door, the car door mounting bracket 7 will drive the rotating bracket 4 to rotate, and then make the high-strength anti-wear rolling balls 13 outside the internal connecting shaft 2 rotate. When the high-strength anti-wear rolling balls 13 rotate, the lubricating oil flowing into the oil guide groove 16 from the oil storage box 5 is carried out by the high-strength anti-wear rolling balls 13, and then the lubricating oil is smeared on the inner wall of the rotating bracket 4. Then the oil scraping cloth plate 14 levels the lubricating oil, so that the rotating bracket 4 and the internal connecting shaft 2 are evenly smeared with lubricating oil. The user only needs to regularly inject a certain amount of lubricating oil into the oil filling cap 6. Since the rotating bracket 4 bears the weight of the car door, the wear-resistant replacement part 15 at the bottom of the rotating bracket 4 will have a certain amount of wear after long-term use. When the wear-resistant replacement part 15 wears, the staff removes the oil storage box 5 and turns the upper top screw 12, so that the upper top screw 12 pushes up the bottom dust-proof boss 10, so that the bottom dust-proof boss 10 drives the rotating bracket 4 to move upward, so that the lower end of the rotating bracket 4 is separated from the wear-resistant replacement part 15. Then the staff removes the damaged wear-resistant replacement part 15 and installs the new wear-resistant replacement part 15 on the upper end of the main body bracket 1. The oil guide groove 16 and the oil storage box 5 set in this device can make the oil evenly smeared on the upper end of the high-strength anti-wear rolling balls 13 under the action of gravity, lubricate the high-strength anti-wear rolling balls 13, and then extend the service life of the device. Installing the high-strength anti-wear rolling balls 13 can enhance the wear-resistant ability of the device, change the sliding friction between the rotating bracket 4 and the internal connecting shaft 2 into rolling friction, reduce the contact area between the rotating bracket 4 and the internal connecting shaft 2, and then reduce the wear of the rotating bracket 4 and the internal connecting shaft 2, so that the rotating bracket 4 and the internal connecting shaft 2 can have a longer service life, and avoid that the parts in the device generate abnormal noises during use due to wear after long-term use of the device, which will affect the use experience of the device. At the same time, when the high-strength anti-wear rolling balls 13 roll, they will evenly smear the oil between the rotating bracket 4 and the internal connecting shaft 2, so that the device can automatically apply oil to the inside of the device when rotating and opening and closing, making the device more convenient to use, reducing the difficulty of oiling the device, enhancing the use effect of the device, and enabling the inside of the device to be effectively lubricated. Installing the oil scraping cloth plate 14 can scrape and smear the oil, so that the oil is evenly smeared between the rotating bracket 4 and the internal connecting shaft 2, enhancing the effect of automatic oiling of the device. Installing the limit and strengthening bracket 8 can increase the strength of the device, prevent the device from skewing, and improve the service life of the device. Installing the upper top screw 12 can push up the bottom dust-proof boss 10, and then make the rotating bracket 4 move upward, which is convenient for the staff to remove the wear-resistant replacement part 15, so that when the staff replaces the wear-resistant replacement part 15, there is no need to disassemble the car door, making the device maintenance more convenient.Reduce the difficulty of later maintenance of the device, enhance the use effect of the device, make the device more user-friendly. Installing the downward pressure spring 20 can push the lower clamping shaft 21 downward. Then, when the device rotates a certain angle, the lower clamping shaft 21 cooperates with the limit ball groove 24, so that the car door is self-limiting, ensuring the integrity of the device's functionality. When the user continues to push the car door, the lower clamping shaft 21 and the limit ball groove 24 are squeezed against each other, causing the lower clamping shaft 21 to retract into the rotating bracket 4 against the elastic force of the downward pressure spring 20. Thus, a limit resistance is generated every time the device rotates a certain angle, enhancing the use effect of the device.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

Claims

1. A self-limiting automobile side door hinge, comprising a main frame (1), characterized in that: An internal connecting shaft (2) is fixedly mounted inside the main support (1); a rotating support (4) is rotatably mounted on the upper end of the external part of the internal connecting shaft (2) through a slot; an oil guide groove (16) is arranged inside the upper end of the internal connecting shaft (2); a plurality of high-strength anti-wear balls (13) are arranged in a circular array on one side of the internal part of the oil guide groove (16) close to the outer wall of the internal connecting shaft (2); the plurality of high-strength anti-wear balls (13) are rotatably connected to the internal connecting shaft (2) through the slot; an oil storage box (5) is threadedly mounted on the upper end of the internal connecting shaft (2); and a plurality of oil scraping cloth plates (14) are arranged on the external part of the internal connecting shaft (2) through a slot circular array; A vehicle body fixed mounting bracket (3) is arranged on one side of the main body bracket (1), a limited reinforcing bracket (8) is fixedly mounted on the upper end of the vehicle body fixed mounting bracket (3) close to the main body bracket (1), and the limited reinforcing bracket (8) is rotatably connected to the rotating bracket (4); A fixed boss (11) is fixedly mounted on the upper end of the exterior of the main support (1), the lower end of the fixed boss (11) is provided with a plurality of top screws (12) through a threaded annular array, and the lower end of the exterior of the rotating support (4) is provided with a bottom dustproof boss (10) through a threaded installation; A matching spherical boss (19) is arranged in an annular array on the upper end surface of the main support (1). Six matching spherical bosses (19) are provided. Wear-resistant replacement parts (15) are installed at both the front and rear ends of the upper end surface of the main support (1). Two wear-resistant replacement parts (15) are provided. The lower ends of the two wear-resistant replacement parts (15) are provided with three matching ball grooves (22). The matching ball grooves (22) match the matching spherical bosses (19) through a slot. The upper end of the wear-resistant replacement part (15) is provided with two annular matching grooves (23). The annular matching grooves (23) are rotatably connected to the lower end of the rotating support (4) through a slot.

2. The self-limiting automobile side door hinge according to claim 1, characterized in that: A flexible anti-backflow sheet (18) is installed inside the lower end of the oil storage box (5). The flexible anti-backflow sheet (18) is fixedly connected to the oil storage box (5). Two flexible anti-backflow sheets (18) are provided.

3. The self-limiting automobile side door hinge according to claim 1, characterized in that: A filter screen (17) is installed inside the oil storage box (5), and the filter screen (17) is connected to the oil storage box (5) via a slot.

4. The self-limiting automobile side door hinge according to claim 1, characterized in that: An oil filling cap (6) is installed at the upper end of the oil storage box (5), and the oil storage box (5) and the oil filling cap (6) are connected via threads.

5. The self-limiting automobile side door hinge according to claim 1, characterized in that: A downward pressure spring (20) is installed inside one side of the lower end of the rotating bracket (4), and the downward pressure spring (20) is fixedly connected to the rotating bracket (4). A lower clamping shaft (21) is fixedly installed at the lower end of the downward pressure spring (20), and the lower clamping shaft (21) is fixedly connected to the downward pressure spring (20). The lower end of the lower clamping shaft (21) is arranged as a ball head structure, and the upper ends of the two wear-resistant replacement parts (15) are respectively provided with three limiting ball grooves (24), and the lower end of the lower clamping shaft (21) is connected to the limiting ball groove (24) through the matching of the clamping grooves.

6. The self-limiting automobile side door hinge according to claim 1, characterized in that: An automobile door mounting bracket (7) is mounted on the outside of the rotating bracket (4), and the automobile door mounting bracket (7) is welded to the rotating bracket (4).

7. The self-limiting automobile side door hinge according to claim 1, characterized in that: A top dustproof boss (9) is installed at the lower end of the exterior of the oil storage box (5), and the oil storage box (5) is welded to the top dustproof boss (9).

8. The self-limiting automobile side door hinge according to claim 1, characterized in that: The matching spherical boss (19) and the main body bracket (1) are arranged as an integrally formed structure, and the vehicle body fixing mounting bracket (3) is welded to the main body bracket (1).

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