Dustproof bearing hinge

Abstract

The invention relates to the technical field of bearings, in particular to a dustproof bearing hinge, an auxiliary bearing body for the hinge comprises an outer ring assembly, bearing balls, an inner ring assembly and a connecting assembly, and the outer ring assembly mainly comprises a first outer ring assembly body and a second outer ring assembly body; the inner ring assembly is mainly composed of a first inner ring assembly body and a second inner ring assembly body, and a first protective attaching plate at the end of the first inner ring assembly body is attached to a first attaching groove in the first outer ring assembly body in a matched mode. A second protective attaching plate at the end part of the second inner ring assembly body is matched and attached with a second attaching groove in the second outer ring assembly body, so that external impurities can be prevented from entering the auxiliary bearing body to influence the work of the auxiliary bearing body, and on the basis, the auxiliary bearing body is further provided with a connecting assembly, so that the service life of the auxiliary bearing body is prolonged. And during later use, the auxiliary bearing body is lubricated without being disassembled, so that the operation is convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to a dust-proof bearing hinge. Background Art

[0002] A hinge is a mechanical device used to connect two solids and allow relative rotation between them. A hinge can be composed of movable components or foldable materials; in order to meet the usage requirements of the hinge, for example, reducing noise and improving usage flexibility, corresponding bearings are generally used in cooperation with the hinge. However, during long-term use, it is necessary to perform dust-proof treatment on the bearings to avoid interference from external impurities on the use of the bearings.

[0003] After retrieval, the Chinese authorized patent document with the publication number CN220929965U discloses a composite sliding bearing for a high-damping automotive hinge. Its solution includes a bearing body, an installation ring is fixedly connected to the rear end of the bearing body, a bearing inner ring is arranged inside the bearing body, a reserved groove is arranged outside the bearing inner ring, fixing blocks are fixedly connected to both ends inside the reserved groove, a connecting shaft is fixedly connected to one end of the fixing block, bearing balls are installed outside the connecting shaft, a connecting ring is arranged inside the installation ring, and installation pieces are fixedly connected to the outside of the connecting ring; its solution uses the cooperation of a dust-proof plate and a sealing ring to protect the inside of the bearing and avoid the influence of external impurities on the inside of the bearing; however, the dust-proof plate provided in its solution for dust prevention is fixed by bolts. On the one hand, relying solely on simple bolt fixation, its stability is insufficient, and connection loosening is likely to occur during long-term use, thereby affecting the tightness of the fit between the dust-proof plate and the bearing, which has an impact on its dust-proof effect. Moreover, when it is necessary to add lubricating oil to the inside of the bearing in the later stage, the dust-proof plate also needs to be disassembled, and then reinstalled after disassembly, which is troublesome to operate.

[0004] Therefore, the present invention proposes a dust-proof bearing hinge to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a dust-proof bearing hinge to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A dust-proof bearing hinge includes a first hinge plate, a second hinge plate, and a connecting pin shaft. A first installation hole is arranged in the first hinge plate and a second installation hole is arranged in the second hinge plate. On one side of the first hinge plate, first connecting sleeves are symmetrically and fixedly arranged, and on one side of the second hinge plate, a second connecting sleeve is fixedly arranged. The second connecting sleeve and the first connecting sleeve are adaptively inserted and connected with the connecting pin shaft; An accommodation cavity is arranged inside the outer barrel opening of the first connecting sleeve, mounting thread grooves are symmetrically arranged in the accommodation cavity, and an auxiliary bearing body is arranged in the accommodation cavity.

[0007] Preferably, the auxiliary bearing body includes an outer ring assembly, bearing balls, an inner ring assembly and a connecting assembly. The outer ring assembly includes a first outer ring assembling body, a first loading cavity, a first communicating groove, a first assembling thread groove, a first oil guiding groove, a through groove, an accommodation groove, a mounting screw, a first fitting groove, a first auxiliary ring groove, a second outer ring assembling body, a second loading cavity, a second communicating groove, a first cylindrical through groove, a second fitting groove, a second auxiliary ring groove, and a positioning card slot. First loading cavities are equidistantly arranged in the first outer ring assembling body, and adjacent first loading cavities are communicated through the arranged first communicating groove. The first assembling thread groove is arranged on the first outer ring assembling body, and a first oil guiding groove is arranged on the side of the first assembling thread groove. The first oil guiding groove is communicated with one of the first loading cavities.

[0008] Preferably, through grooves are symmetrically arranged in the first outer ring assembling body. An accommodation groove is arranged at one end opening of the through groove. The mounting screw passes through the through groove, and the end of the mounting screw is threadedly connected with the mounting thread groove in the accommodation cavity in a matching manner. A first fitting groove is arranged on the back side of the first outer ring assembling body, and a first auxiliary ring groove is arranged in the first fitting groove.

[0009] Preferably, second loading cavities are equidistantly arranged in the second outer ring assembling body, and adjacent second loading cavities are communicated through the second communicating groove. A first cylindrical through groove is arranged through the second outer ring assembling body. A second fitting groove is arranged on the second outer ring assembling body, and a second auxiliary ring groove is arranged in the second fitting groove. A positioning card slot is arranged on the outer end face of the second outer ring assembling body, and the positioning card slot is symmetrically arranged with respect to the first cylindrical through groove.

[0010] Preferably, the second loading cavity and the first loading cavity are arranged in corresponding positions and have the same number of sets, and the two are spliced to form a ball loading cavity. A bearing ball is placed in the ball loading cavity. The second communicating groove and the first communicating groove are arranged in corresponding positions, and the two are spliced to form an oil fluid communicating groove. The second outer ring assembling body and the first outer ring assembling body are spliced to form an outer ring main body, and the two are firmly connected through the arranged connecting assembly.

[0011] Preferably, the inner ring assembly includes a first inner ring assembly body, a first annular fitting groove, a first protective fitting plate, a second assembling screw groove, a second inner ring assembly body, a second annular fitting groove, a second protective fitting plate, a second cylindrical through groove, and a positioning screw; a first annular fitting groove is provided on the outer side of the end of one end of the first inner ring assembly body, and a first protective fitting plate is fixedly provided at the other end of the first inner ring assembly body, and second assembling screw grooves are symmetrically arranged at the same end as the first annular fitting groove.

[0012] Preferably, a second annular fitting groove is provided on the side of one end of the second inner ring assembly body, a second protective fitting plate is fixedly provided at the other end of the second inner ring assembly body, second cylindrical through grooves are symmetrically arranged in the second inner ring assembly body, and the positioning screw passes through the second cylindrical through groove and the end thereof is threadedly connected with the second assembling screw groove in a matching manner.

[0013] Preferably, the first inner ring assembly body and the second inner ring assembly body are spliced to form an inner ring main body, and the two are connected and fixed by the provided positioning screws, and the inner ring main body is sleeved on the connecting pin shaft; the first annular fitting groove and the second annular fitting groove are arranged corresponding to each other in position, and the two are spliced to form an annular guiding groove, and the annular guiding groove is used in cooperation with the bearing balls, and the first protective fitting plate at the end of the first inner ring assembly body is fitted with the first fitting groove on the first outer ring assembly body in a matching manner, and the second protective fitting plate at the end of the second inner ring assembly body is fitted with the second fitting groove on the second outer ring assembly body in a matching manner.

[0014] Preferably, the connecting assembly includes a connecting stud body, a cylindrical screw head, an oil guiding cavity, a limiting card slot, an auxiliary side through groove, a concave positioning card strip, and a sealing plug head; a cylindrical screw head is fixedly provided at one end of the connecting stud body, and an oil guiding cavity is provided through the connecting stud body along its axial direction, and the oil guiding cavity extends to the end of the cylindrical screw head, and a limiting card slot is provided at the end of the cylindrical screw head, and the limiting card slot is communicated with the orifice of the oil guiding cavity.

[0015] Preferably, an auxiliary side through groove is provided at the side position of the connecting stud body, and the auxiliary side through groove is communicated with the oil guiding cavity, a sealing plug head is fixedly provided at the middle position inside the concave positioning card strip, and the end of the sealing plug head is inserted into the orifice of the oil guiding cavity in a matching manner.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The dust-proof bearing hinge designed by the present invention includes a first hinge plate, a second hinge plate and a connecting pin shaft. A first mounting hole is provided in the first hinge plate and a second mounting hole is provided in the second hinge plate. On one side of the first hinge plate, first connecting sleeves are symmetrically and fixedly arranged, and on one side of the second hinge plate, a second connecting sleeve is fixedly arranged. The second connecting sleeve and the first connecting sleeves are adaptively inserted and connected with the connecting pin shaft. In this solution, a placement cavity is arranged inside the outer barrel opening of the first connecting sleeve, and mounting thread grooves are symmetrically arranged in the placement cavity. An auxiliary bearing body is arranged in the placement cavity. The auxiliary bearing body for the hinge in this solution includes an outer ring assembly, bearing balls, an inner ring assembly and a connecting component. The outer ring assembly mainly includes a first outer ring assembling body and a second outer ring assembling body. The inner ring assembly is mainly composed of a first inner ring assembling body and a second inner ring assembling body. The first protective fitting plate at the end of the first inner ring assembling body is adaptively fitted with the first fitting groove on the first outer ring assembling body, and the second protective fitting plate at the end of the second inner ring assembling body is adaptively fitted with the second fitting groove on the second outer ring assembling body, so as to prevent external impurities from entering the inside of the auxiliary bearing body and affecting its operation, and also to prevent dust and other impurities from accumulating inside the auxiliary bearing body. And on this basis, in this solution, through the arranged connecting component, when lubricating the auxiliary bearing body in later use, there is no need to disassemble the auxiliary bearing body, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural connection diagram of the bearing hinge of the present invention; Figure 2 is Figure 1 an enlarged schematic structural connection diagram of part A in Figure 3 is a schematic structural connection diagram of the inner part of the outer end of the first connecting sleeve of the present invention; Figure 4 is Figure 3 an enlarged schematic structural connection diagram of part B in Figure 5 is a schematic front view of the exploded structural connection of the auxiliary bearing body of the present invention; Figure 6 is a schematic rear view of the exploded structural connection of the auxiliary bearing body of the present invention; Figure 7 is a schematic front view of the structures of the first outer ring assembling body and the first inner ring assembling body of the present invention; Figure 8 is Figure 7 an enlarged schematic structural connection diagram of part C in Figure 9 is a schematic rear view of the structures of the first outer ring assembling body and the first inner ring assembling body of the present invention; Figure 10 is Figure 9Schematic enlarged view of the structural connection at D in the [Chinese context]; Figure 11 Schematic view of the back side of the structures of the second outer ring assembly and the second inner ring assembly of the present invention; Figure 12 For Figure 11 Schematic enlarged view of the structural connection at E in the [Chinese context]; Figure 13 Schematic view of the front side of the structures of the second outer ring assembly and the second inner ring assembly of the present invention; Figure 14 For Figure 13 Schematic enlarged view of the structural connection at F in the [Chinese context].

[0018] In the figure: first hinge plate 1, first mounting hole 101, first connecting sleeve 102, placement cavity 103, mounting thread groove 104, second hinge plate 2, second mounting hole 201, second connecting sleeve 202, connecting pin shaft 3, first outer ring assembly 401, first loading cavity 402, first communication groove 403, first assembly thread groove 404, first oil guiding groove 405, through groove 406, accommodation groove 407, mounting screw 408, first fitting groove 409, first auxiliary ring groove 410, bearing ball 5, second outer ring assembly 601, second loading cavity 602, second communication groove 603, first cylindrical through groove 604, second fitting groove 605, second auxiliary ring groove 606, positioning card slot 607, first inner ring assembly 701, first annular mating groove 702, first protective fitting plate 703, second assembly thread groove 704, second inner ring assembly 801, second annular mating groove 802, second protective fitting plate 803, second cylindrical through groove 804, positioning screw 805, connecting stud body 901, cylindrical screw head 902, oil guiding cavity 903, limiting card slot 904, auxiliary side through groove 905, concave positioning card strip 906, plugging head 907. Specific embodiments

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. For the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: Please refer to Figures 1 - 14, a dust-proof bearing hinge, comprising a first hinge plate 1, a second hinge plate 2 and a connecting pin shaft 3. A first mounting hole 101 is provided in the first hinge plate 1 and a second mounting hole 201 is provided in the second hinge plate 2. On one side of the first hinge plate 1, first connecting sleeves 102 are symmetrically and fixedly provided, and on one side of the second hinge plate 2, a second connecting sleeve 202 is fixedly provided. The second connecting sleeve 202 and the first connecting sleeves 102 are adapted to be inserted and connected with the connecting pin shaft 3. In this solution, a placement cavity 103 is provided inside the outer barrel opening of the first connecting sleeve 102, and mounting threaded grooves 104 are symmetrically provided in the placement cavity 103. An auxiliary bearing body is provided in the placement cavity 103.

[0021] In this solution, the auxiliary bearing body for the hinge includes an outer ring assembly, bearing balls 5, an inner ring assembly and a connecting assembly. The outer ring assembly mainly consists of a first outer ring assembling body 401 and a second outer ring assembling body 601. The inner ring assembly is mainly composed of a first inner ring assembling body 701 and a second inner ring assembling body 801. The first protective fitting plate 703 at the end of the first inner ring assembling body 701 is adapted to fit with the first fitting groove 409 on the first outer ring assembling body 401, and the second protective fitting plate 803 at the end of the second inner ring assembling body 801 is adapted to fit with the second fitting groove 605 on the second outer ring assembling body 601, so as to avoid external impurities from entering the interior of the auxiliary bearing body and affecting its operation, and also to avoid the accumulation of dust and other impurities inside the auxiliary bearing body. And on this basis, in this solution, through the provided connecting assembly, when lubricating the auxiliary bearing body during later use, it is not necessary to disassemble the auxiliary bearing body, and the operation is convenient. And through the cooperation of the connecting stud body 901 with the concave positioning strip 906 and the positioning groove 607, the connection stability between the first outer ring assembling body 401 and the second outer ring assembling body 601 can be further improved.

[0022] Among them, the first outer ring assembly 401 in the outer ring assembly is equidistantly provided with first loading cavities 402, and the adjacent first loading cavities 402 are communicated through the provided first communication grooves 403. The first assembly screw groove 404 is provided on the first outer ring assembly 401, and a first oil guiding groove 405 is provided on the side of the first assembly screw groove 404. The first oil guiding groove 405 is communicated with one of the first loading cavities 402; through grooves 406 are symmetrically provided in the first outer ring assembly 401. A receiving groove 407 is provided at one end of the through groove 406. The mounting screw 408 passes through the through groove 406, and the end of the mounting screw 408 is threadedly connected with the mounting thread groove 104 in the placing cavity 103 in a matching manner. A first fitting groove 409 is provided on the back side of the first outer ring assembly 401, and a first auxiliary ring groove 410 is provided in the first fitting groove 409; the second outer ring assembly 601 is equidistantly provided with second loading cavities 602, and the adjacent second loading cavities 602 are communicated through the second communication grooves 603. A first cylindrical through groove 604 is provided through the second outer ring assembly 601. A second fitting groove 605 is provided on the second outer ring assembly 601, and a second auxiliary ring groove 606 is provided in the second fitting groove 605. A positioning card slot 607 is provided on the outer end face of the second outer ring assembly 601, and the positioning card slot 607 is symmetrically arranged with respect to the first cylindrical through groove 604; the second loading cavity 602 and the first loading cavity 402 are arranged in corresponding positions and have the same number of sets, and the two are spliced to form a ball loading cavity, and a bearing ball 5 is placed in the ball loading cavity. The second communication groove 603 and the first communication groove 403 are arranged in corresponding positions, and the two are spliced to form an oil fluid communication groove; the second outer ring assembly 601 and the first outer ring assembly 401 are spliced to form an outer ring main body, and the two are firmly connected through the provided connection assembly.

[0023] The first protective fitting plate 703 is fitted with the first fitting groove 409, and the second protective fitting plate 803 is fitted with the second fitting groove 605, so that after the outer ring assembly and the inner ring assembly are spliced and installed, the bearing ball 5 inside will not be exposed to the outside, and foreign dust and other impurities are not easy to enter the auxiliary bearing body and accumulate; a first auxiliary ring groove 410 is provided on the first fitting groove 409, and a second auxiliary ring groove 606 is provided on the second fitting groove 605. The purpose of providing the first auxiliary ring groove 410 and the second auxiliary ring groove 606 here is to play a buffering and protective role, that is, for external dust and impurities, if there is fine dust-free from the first protective When dust enters from the gap between the bonding plate 703 and the first bonding groove 409 or the gap between the second protective bonding plate 803 and the second bonding groove 605, or when fine dust accumulates at the gap position, it may slowly penetrate from the gap position during long-term operation. At this time, the auxiliary ring groove provided has a temporary storage and blocking effect, further improving its dust prevention effect. Similarly, on the other hand, when filling lubricating oil, if the lubricating oil overflows from the gap between the first protective bonding plate 703 and the first bonding groove 409 or the gap between the second protective bonding plate 803 and the second bonding groove 605, the auxiliary ring groove provided at this time can provide a blocking effect. The function of blocking and buffering is to prevent the lubricating oil from leaking outward and causing waste of resources. A first annular matching groove 702 is arranged on the outer side of the end of one end of the first inner ring assembly 701 in the inner ring component, and a first protective fitting plate 703 is fixedly arranged on the other end of the first inner ring assembly 701, and a second assembly screw groove 704 is symmetrically arranged at the same end as the first annular matching groove 702; a second annular matching groove 802 is arranged on the side of one end of the second inner ring assembly 801, and a second protective fitting plate 803 is fixedly arranged on the other end of the second inner ring assembly 801, and a second cylindrical through groove 804 is also symmetrically arranged in the second inner ring assembly 801, and a positioning screw 805 passes through the second cylindrical through groove 804. The through groove 804 and the end thereof are threadedly connected with the second assembly screw groove 704; and the two are connected and fixed by a set positioning screw 805, and the inner ring body is sleeved on the connecting pin shaft 3; the first annular matching groove 702 and the second annular matching groove 802 are set in corresponding positions, and the two are spliced to form an annular guide groove, which is used in conjunction with the bearing ball 5, and the first protective fitting plate 703 at the end of the first inner ring assembly 701 is adapted to fit with the first fitting groove 409 on the first outer ring assembly 401, and the second protective fitting plate 803 at the end of the second inner ring assembly 801 is adapted to fit with the second fitting groove 605 on the second outer ring assembly 601.

[0024] For the installation and use of the auxiliary bearing body, first, fit the first protective fitting plate 703 at the end of the first inner ring assembly 701 into the first fitting groove 409 on the back side of the first outer ring assembly 401, and the first inner ring assembly 701 is located inside the first outer ring assembly 401. Then, place the two together in the placement cavity 103 inside the outer barrel opening of the first connecting sleeve 102, and align the through groove 406 in the first outer ring assembly 401 with the installation thread groove 104 in the placement cavity 103. Then, install them with the installation screw 408. After that, place the bearing balls 5 one by one in the first loading cavity 402 on the first outer ring assembly 401; then install the second outer ring assembly 601, that is, make the second outer ring assembly 601 close to the first outer ring assembly 401, and align the second loading cavity 602 on the second outer ring assembly 601 with the bearing balls 5. At the same time, align the first cylindrical through groove 604 provided in the second outer ring assembly 601 with the first assembly thread groove 404 on the first outer ring assembly 401. Then, install and fix the second outer ring assembly 601 through the provided connecting component, that is, connect the second outer ring assembly 601 and the first outer ring assembly 401; finally, install the second inner ring assembly 801, that is, insert the second inner ring assembly 801 into the inner ring of the second outer ring assembly 601, and make the second protective fitting plate 803 at the end of the second inner ring assembly 801 fit with the second fitting groove 605 on the second outer ring assembly 601. Adjust the second inner ring assembly 801 to align the second cylindrical through groove 804 therein with the second assembly thread groove 704 on the first inner ring assembly 701. Then, pass the positioning screw 805 through the second cylindrical through groove 804 and thread it with the second assembly thread groove 704 to complete the connection between the first inner ring assembly 701 and the second inner ring assembly 801. The first inner ring assembly 701 and the second inner ring assembly 801 are spliced to form an inner ring body. The inner ring body can rotate, and the inner ring body is sleeved with the connecting pin shaft 3.

[0025] For the use of the connecting component, one end of the connecting stud body 901 is fixedly provided with a cylindrical screw head 902, and the connecting stud body 901 is provided with an oil guiding cavity 903 penetrating along its axial direction, and the oil guiding cavity 903 extends to the end of the cylindrical screw head 902. A limit card slot 904 is provided at the end of the cylindrical screw head 902, and the limit card slot 904 is communicated with the orifice of the oil guiding cavity 903; an auxiliary side through groove 905 is provided at the side position of the connecting stud body 901, and the auxiliary side through groove 905 is communicated with the oil guiding cavity 903. A sealing plug 907 is fixedly provided at the middle position inside the concave positioning card strip 906, and the end of the sealing plug 907 is adaptively inserted into the orifice of the oil guiding cavity 903; that is, the connecting stud body 901 is inserted into the first cylindrical through groove 604 in the second outer ring assembly 601 and is threadedly connected with the first assembly screw groove 404 on the first outer ring assembly 401. After the connecting stud body 901 is tightened, the auxiliary side through groove 905 provided on the side of the connecting stud body 901 reaches the side position of the first oil guiding groove 405; and the limit card slot 904 provided at the end of the cylindrical screw head 902 is aligned with the positioning card slot 607 on the second outer ring assembly 601. Then, the two ends of the concave positioning card strip 906 are respectively clamped with the positioning card slot 607, and the sealing plug 907 provided at the middle position inside the concave positioning card strip 906 seals the orifice of the oil guiding cavity 903 at the end of the cylindrical screw head 902.

[0026] The clamping of the concave positioning card strip 906 and the positioning card slot 607 can prevent the connecting stud body 901 from loosening due to axial movement, that is, improve the stability of the connection between the first outer ring assembly 401 and the second outer ring assembly 601; the provided sealing plug 907 can seal the orifice of the oil guiding cavity 903 to prevent external dust and impurities from entering the oil guiding cavity 903. When lubricating oil needs to be filled in the later stage, the concave positioning card strip 906 is pulled out, and then the lubricating oil is introduced into the oil guiding cavity 903 by means of syringe injection. The introduced lubricating oil enters the first oil guiding groove 405 from the auxiliary side through groove 905, and then enters the first loading cavity 402 communicated with the first oil guiding groove 405 to lubricate the bearing balls 5. And the adjacent first loading cavities 402 are communicated through the first communication groove 403, and the filled lubricating oil will also enter other first loading cavities 402. After an appropriate amount is filled, the orifice of the oil guiding cavity 903 on the cylindrical screw head 902 is sealed by the sealing plug 907, and then the sealing plugs 907 on the cylindrical screw heads 902 at other positions are pulled out to continue filling the lubricating oil, which is convenient for the uniformity of lubricating oil filling.

[0027] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust-proof bearing hinge, comprising a first hinge plate (1), a second hinge plate (2) and a connecting pin shaft (3). A first mounting hole (101) is provided in the first hinge plate (1), and a second mounting hole (201) is provided in the second hinge plate (2). On one side of the first hinge plate (1), first connecting sleeves (102) are symmetrically and fixedly provided, and on one side of the second hinge plate (2), a second connecting sleeve (202) is fixedly provided. The second connecting sleeve (202) and the first connecting sleeves (102) are adaptively inserted and connected with the connecting pin shaft (3). It is characterized in that: On the inner side of the outer barrel opening of the first connecting sleeve (102), a placement cavity (103) is provided, and mounting thread grooves (104) are symmetrically provided in the placement cavity (103). An auxiliary bearing body is provided in the placement cavity (103).

2. The dust-proof bearing hinge according to claim 1, characterized in that: The auxiliary bearing body includes an outer ring assembly, bearing balls (5), an inner ring assembly and a connecting assembly. The outer ring assembly includes a first outer ring assembly body (401), a first loading cavity (402), a first communication groove (403), a first assembly screw groove (404), a first oil guiding groove (405), a through groove (406), a receiving groove (407), a mounting screw (408), a first fitting groove (409), a first auxiliary ring groove (410), a second outer ring assembly body (601), a second loading cavity (602), a second communication groove (603), a first cylindrical through groove (604), a second fitting groove (605), a second auxiliary ring groove (606), and a positioning card slot (607). The first outer ring assembly body (401) is equidistantly provided with first loading cavities (402), and adjacent first loading cavities (402) are communicated through the provided first communication groove (403). The first assembly screw groove (404) is provided on the first outer ring assembly body (401), and a first oil guiding groove (405) is provided on the side of the first assembly screw groove (404). The first oil guiding groove (405) is communicated with one of the first loading cavities (402).

3. The dust-proof bearing hinge according to claim 2, wherein: The first outer ring assembly body (401) is also symmetrically provided with through grooves (406). At one end of the through groove (406), a receiving groove (407) is provided. The mounting screw (408) passes through the through groove (406), and the end of the mounting screw (408) is threadedly connected with the mounting thread groove (104) in the placement cavity (103). On the back side of the first outer ring assembly body (401), a first fitting groove (409) is provided, and a first auxiliary ring groove (410) is provided in the first fitting groove (409).

4. The dust-proof bearing hinge according to claim 2, characterized in that: The second outer ring assembly (601) is equidistantly provided with second loading cavities (602), and adjacent second loading cavities (602) are communicated through second communication grooves (603). A first cylindrical through groove (604) is penetrated through the second outer ring assembly (601). The second fitting groove (605) is arranged on the second outer ring assembly (601), and a second auxiliary ring groove (606) is arranged in the second fitting groove (605). A positioning card slot (607) is arranged on the outer end face of the second outer ring assembly (601), and the positioning card slot (607) is symmetrically arranged with respect to the first cylindrical through groove (604).

5. The dust-proof bearing hinge according to claim 2, characterized in that: The second loading cavity (602) and the first loading cavity (402) are arranged in corresponding positions and have the same number of sets, and the two are spliced to form a ball loading cavity, and a bearing ball (5) is placed in the ball loading cavity. The second communication groove (603) and the first communication groove (403) are arranged in corresponding positions, and the two are spliced to form an oil fluid communication groove; the second outer ring assembly (601) and the first outer ring assembly (401) are spliced to form an outer ring main body, and the two are firmly connected through the arranged connection components.

6. The dust-proof bearing hinge according to claim 2, characterized in that: The inner ring assembly includes a first inner ring assembly (701), a first annular fitting groove (702), a first protective fitting plate (703), a second assembly screw groove (704), and a second inner ring assembly (801), a second annular fitting groove (802), a second protective fitting plate (803), a second cylindrical through groove (804), and a positioning screw (805); a first annular fitting groove (702) is arranged on the outer side of one end of the first inner ring assembly (701), and a first protective fitting plate (703) is fixedly arranged at the other end of the first inner ring assembly (701), and second assembly screw grooves (704) are symmetrically arranged at the same end as the first annular fitting groove (702).

7. The dust-proof bearing hinge according to claim 6, wherein: A second annular fitting groove (802) is arranged on the side of one end of the second inner ring assembly (801), a second protective fitting plate (803) is fixedly arranged at the other end of the second inner ring assembly (801), a second cylindrical through groove (804) is symmetrically arranged in the second inner ring assembly (801), and the positioning screw (805) passes through the second cylindrical through groove (804) and the end is threadedly connected to the second assembly screw groove (704) in an adapted manner.

8. The dust-proof bearing hinge according to claim 6, wherein: The first inner ring assembly (701) and the second inner ring assembly (801) are spliced to form an inner ring body, and the two are fixedly connected by the set positioning screws (805). The inner ring body is sleeved on the connecting pin shaft (3); the positions of the first annular fitting groove (702) and the second annular fitting groove (802) correspond to each other, and the two are spliced to form an annular guide groove, and the annular guide groove is used in cooperation with the bearing balls (5). The first protective fitting plate (703) at the end of the first inner ring assembly (701) is adapted to fit with the first fitting groove (409) on the first outer ring assembly (401), and the second protective fitting plate (803) at the end of the second inner ring assembly (801) is adapted to fit with the second fitting groove (605) on the second outer ring assembly (601).

9. The dust-proof bearing hinge according to claim 2, wherein: The connection component includes a connection stud body (901), a cylindrical screw head (902), an oil guiding cavity (903), a limit card slot (904), an auxiliary side through groove (905), a concave positioning strip (906) and a plugging head (907); one end of the connection stud body (901) is fixedly provided with a cylindrical screw head (902), and the connection stud body (901) is provided with an oil guiding cavity (903) along its axial direction, and the oil guiding cavity (903) extends to the end of the cylindrical screw head (902). A limit card slot (904) is arranged at the end of the cylindrical screw head (902), and the limit card slot (904) is communicated with the orifice of the oil guiding cavity (903).

10. The dust-proof bearing hinge according to claim 9, characterized in that: An auxiliary side through groove (905) is arranged on the side of the connection stud body (901), and the auxiliary side through groove (905) is communicated with the oil guiding cavity (903). A plugging head (907) is fixedly arranged at the middle position inside the concave positioning strip (906), and the end of the plugging head (907) is adapted to be inserted into the orifice of the oil guiding cavity (903).

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