One-way torque hinge with adjustable torque force

Abstract

The invention belongs to the technical field of hinges, and particularly discloses a torque-adjustable one-way torque hinge which comprises a left shell, a right shell, a middle shell, a long shaft, a friction plate, a one-way bearing, a sealing ring, a metal side sealing block, a pin and a connecting relation of the left shell, the right shell, the middle shell, the long shaft and the pin. Friction force is generated through interference meshing between the metal friction plates and the long shaft, so that torque force is formed, and then the torque force of the hinge is set by changing the number of the friction plates.

Description

Technical Field

[0001] The invention relates to the technical field of hinges, and in particular to a one-way torque hinge with adjustable torque force. Background Art

[0002] A hinge, also known as a hinge, is a mechanical device used to connect two solid objects and allow them to rotate relative to each other. A hinge is made of movable components or foldable materials, and is mainly installed on doors, windows, cabinets, etc. Currently, all hinges on the market have torque when opening and closing. There is a lack of hinges that have torque when opening but no torque when closing, or have no torque when opening but have torque when closing. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems existing in the background technology, and for this purpose, a one-way torque hinge with adjustable torque force is provided.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A one-way torque hinge with adjustable torque force comprises a long axis, at least one first shell and at least one second shell;

[0006] The long shaft is interference-connected with N friction plates, where N≥1;

[0007] The friction plate is installed in the friction plate installation cavity of the first housing and the friction plate rotates with the rotation of the first housing;

[0008] A one-way bearing is installed between the long shaft and the second shell.

[0009] The following is a technical solution further defined in the present invention: one end of the friction plate is rectangular and the other end is arc-shaped, and the cross-sectional shape of the friction plate mounting cavity is adapted to the shape of the friction plate.

[0010] The following is a technical solution further defined in the present invention, wherein the number of the first housing is one and it is a middle housing, and the middle housing is installed at the middle position of the long shaft through N friction plates;

[0011] The number of the second housings is 2 and the two second housings are respectively a left housing and a right housing, a left one-way bearing is installed between the left housing and the left end of the long shaft, and a right one-way bearing is installed between the right housing and the right end of the long shaft;

[0012] The left one-way bearing and the right one-way bearing have the same rotation direction.

[0013] The following is a technical solution further defined by the present invention, wherein the left housing comprises a left bearing mounting portion and a left connecting portion which are integrally arranged, and a connecting hole is provided on the left connecting portion;

[0014] The left bearing mounting portion is provided with a stepped mounting cavity, the stepped mounting cavity comprises a small inner diameter mounting cavity and a large inner diameter mounting cavity arranged in sequence, and a plurality of clamping ribs are evenly distributed on the inner wall of the large inner diameter mounting cavity;

[0015] The left one-way bearing is installed in the large inner diameter installation cavity, the outer diameter of the left one-way bearing is larger than the inner diameter of the small inner diameter installation cavity and smaller than or equal to the inner diameter of the large inner diameter installation cavity, and a plurality of grooves are provided on the outer wall of the left one-way bearing along its axial direction, and the grooves cooperate with the clamping ribs;

[0016] The long shaft is tightly connected to the inner wall of the left one-way bearing, and the long shaft passes through the left one-way bearing and extends into the small inner diameter installation cavity.

[0017] The following is a technical solution further defined by the present invention, wherein the right housing comprises a right bearing mounting portion and a right connecting portion which are integrally arranged, and a connecting hole is provided on the right connecting portion;

[0018] The right bearing mounting portion is provided with a stepped mounting cavity, the stepped mounting cavity comprises a small inner diameter mounting cavity and a large inner diameter mounting cavity arranged in sequence, a plurality of clamping ribs are arranged on the inner wall of the large inner diameter mounting cavity, and the length of the clamping ribs is less than the axial length of the large inner diameter mounting cavity;

[0019] The right one-way bearing is installed in the large inner diameter installation cavity, the outer diameter of the right one-way bearing is larger than the inner diameter of the small inner diameter installation cavity and smaller than or equal to the inner diameter of the large inner diameter installation cavity, and a plurality of slots are provided on the outer wall of the right one-way bearing along its axial direction, and the slots cooperate with the clamping ribs;

[0020] The long shaft is tightly connected to the inner wall of the right one-way bearing, and the long shaft passes through the right one-way bearing and extends into the small inner diameter installation cavity.

[0021] The following is a technical solution further defined in the present invention, wherein the middle shell includes a middle mounting portion and a middle connecting portion that are integrally arranged, the middle connecting portion is provided with a connecting hole, the middle mounting portion is provided with a side seal block mounting cavity and a friction plate mounting cavity, the side seal block mounting cavities are symmetrically arranged on both sides of the friction plate mounting cavity, and N friction plates are axially installed in the friction plate mounting cavity along the long axis.

[0022] The following is a technical solution further defined by the present invention, wherein a sealing ring and a metal side sealing block are installed between the middle mounting portion and the left bearing mounting portion of the left housing and between the middle mounting portion and the right bearing mounting portion of the right housing;

[0023] The metal side seal block is installed in the side seal block installation cavity, one side of the metal side seal block abuts against the side opening of the friction plate installation cavity, and the other side abuts against the sealing ring;

[0024] The left bearing mounting portion or the right bearing mounting portion is respectively in contact with the corresponding sealing ring.

[0025] The following is a technical solution further defined by the present invention, wherein the inner diameter of the large inner diameter installation cavity of the left bearing installation portion or the inner diameter of the large inner diameter installation cavity of the right bearing installation portion is respectively adapted to the outer diameter of the corresponding sealing ring;

[0026] The length of the clamping rib on the inner wall of the large inner diameter installation cavity is smaller than the axial length of the large inner diameter installation cavity, and the opening of one end of the large inner diameter installation cavity away from the sealing ring is aligned with one end of the clamping rib;

[0027] The sealing ring extends into the large inner diameter installation cavity and one side of the sealing ring abuts against the end of the clamping rib, and the other side abuts against the metal side sealing block.

[0028] The following is a technical solution further defined in the present invention, wherein the metal side sealing block comprises a first abutting portion, a second abutting portion and a third abutting portion connected in sequence, and the cross section of the metal side sealing block is set to be T-shaped;

[0029] The cross section of the first abutting portion is rectangular at one end and arc-shaped at the other end;

[0030] The cross section of the second abutting portion is rectangular at one end and arc-shaped at the other end;

[0031] The cross-sectional shape of the third abutting portion is circular;

[0032] The first abutting portion and the second abutting portion of the metal side seal block are installed in the side seal block installation cavity, and the outer wall shapes of the first abutting portion and the second abutting portion of the metal side seal block are adapted to the inner wall shape of the side seal block installation cavity;

[0033] A sealing abutment surface is provided at the connection between the side seal block installation cavity and the friction plate installation cavity, and the first abutment portion abuts against the sealing abutment surface;

[0034] The sealing ring is sleeved on the outer side of the third abutting portion;

[0035] The left one-way bearing or the right one-way bearing abuts against the third abutting portion.

[0036] The following is a technical solution further defined in the present invention, wherein a pin is connected between the left connecting part of the left shell and the right connecting part of the right shell, a pin groove is provided on the back of the right connecting part, a stepped pin through groove is provided on the left connecting part, the cross-section of the pin is set to be T-shaped, and one end of the pin passes through the stepped pin through groove and extends into the pin groove.

[0037] Compared with the prior art, the present invention has the following technical effects:

[0038] The present invention utilizes the interference fit between the metal friction plate and the long shaft to generate friction force, thereby forming torque force, and then sets the torque force of the hinge by changing the number of friction plates.

[0039] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 It is a schematic diagram of the structure of the present invention;

[0042] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0043] Figure 3 It is a partial structural schematic diagram of the present invention;

[0044] Figure 4 It is a schematic diagram of a part of the structure after the number of friction plates is reduced in the present invention;

[0045] Figure 5 It is a schematic diagram of the structure of the left housing in the present invention, wherein: Figure 5 (a) is a schematic diagram of the structure of the left shell from a perspective. Figure 5 (b) is a schematic diagram of the structure of the left shell from another perspective;

[0046] Figure 6 It is a schematic diagram of the structure of the right housing in the present invention, wherein: Figure 6 (a) is a schematic diagram of the structure of the right shell from one perspective. Figure 6 (b) is a schematic diagram of the structure of the right shell from another perspective;

[0047] Figure 7 : is a schematic diagram of the structure of the middle shell in the present invention, wherein: Figure 7 (a) is a schematic diagram of the structure of the middle shell from one perspective. Figure 7 (b) is a schematic diagram of the structure of the middle shell from another perspective;

[0048] Figure 8 It is a structural schematic diagram of the left one-way bearing in the present invention;

[0049] Fig. 9 is a schematic diagram of the structure of the metal side seal block in the present invention, wherein: Fig. 9 (a) is a schematic diagram of the structure of the metal side seal from one perspective. Fig. 9 (b) is a schematic diagram of the structure of the metal side seal block from another perspective;

[0050] Fig.10 It is a schematic diagram of the structure of the friction plate in the present invention;

[0051] Fig.11 It is a schematic diagram of the back structure of the present invention.

[0052] Figure numerals: 1. left outer shell; 101. left bearing mounting portion; 102. left connecting portion; 102a. stepped pin through groove; 2. right outer shell; 201. right bearing mounting portion; 202. right connecting portion; 202a. pin groove; 3. middle outer shell; 301. middle mounting portion; 301a. side seal block mounting cavity; 301b. friction plate mounting cavity; 302. middle connecting portion; 4. long shaft; 5. friction plate; 6. left one-way bearing; 7. right one-way bearing; 8. small inner diameter mounting cavity; 9. large inner diameter mounting cavity; 10. retaining rib; 11. retaining groove; 12. sealing ring; 13. metal side seal block; 1301. first abutting portion; 1302. second abutting portion; 1303. third abutting portion; 14. sealing abutting surface; 15. pin. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0054] like Figure 1-11 As shown, this embodiment provides a one-way torque hinge with adjustable torque force, which is mainly composed of a left shell 1, a right shell 2, a middle shell 3, a long shaft 4, a friction plate 5, a one-way bearing, a sealing ring 12, a metal side seal block 13 and a pin 15, etc.

[0055] like Figure 5 As shown, the left housing 1 includes an integrally arranged left bearing mounting portion 101 and a left connecting portion 102. The left connecting portion 102 is provided with a connecting hole for connecting the hinged left housing 1 with other structures. The left bearing mounting portion 101 is provided with a stepped mounting cavity, which includes a small inner diameter mounting cavity 8 and a large inner diameter mounting cavity 9 arranged in sequence. A plurality of clamping ribs 10 are evenly distributed on the inner wall of the large inner diameter mounting cavity 9. The left connecting portion 102 is provided with a stepped pin through groove 102a.

[0056] like Figure 6As shown, the right housing 2 includes an integrally arranged right bearing mounting portion 201 and a right connecting portion 202. The right connecting portion 202 is provided with a connecting hole for connecting the hinged right housing 2 with other structures. The right bearing mounting portion 201 is provided with a stepped mounting cavity, which includes a small inner diameter mounting cavity 8 and a large inner diameter mounting cavity 9 arranged in sequence. A plurality of clamping ribs 10 are provided on the inner wall of the large inner diameter mounting cavity 9. A pin groove 202a is provided on the back of the right connecting portion 202.

[0057] like Figure 7 As shown, the middle housing 3 includes an integral middle installation portion 301 and a middle connection portion 302. The middle connection portion 302 is provided with a connection hole for connecting the hinged middle housing 3 with other structures. The middle installation portion 301 is provided with a side seal block installation cavity 301a and a friction plate installation cavity 301b. The side seal block installation cavity 301a is symmetrically arranged on both sides of the friction plate installation cavity 301b. The friction plate installation cavity 301b has a smaller inner diameter as it moves toward the middle.

[0058] like Figure 8 As shown, the one-way bearing is cylindrical, and three slots 11 are opened on the outer wall of the one-way bearing along its axial direction, and the three slots 11 are evenly distributed. It should be noted that the structural characteristics of the one-way bearing itself are the existing technology, that is, the inner ring and the outer ring of the one-way bearing can only rotate in one direction, and cannot rotate in both the forward and reverse directions.

[0059] like Fig. 9 As shown, the metal side seal 13 includes a first abutment portion 1301, a second abutment portion 1302 and a third abutment portion 1303 connected in sequence, and the metal side seal 13 is cross-sectioned along the direction of the axis, and its cross-sectional shape is T-shaped. The first abutment portion 1301 is cross-sectioned along the direction perpendicular to the axis, and its cross-sectional shape is rectangular at one end and arc-shaped at the other end. The second abutment portion 1302 is cross-sectioned along the direction perpendicular to the axis, and its cross-sectional shape is rectangular at one end and arc-shaped at the other end. The third abutment portion 1303 is cross-sectioned along the direction perpendicular to the axis, and its cross-sectional shape is circular.

[0060] like Fig.10 As shown, one end of the friction plate 5 is rectangular and the other end is arc-shaped. The arc-shaped portion of the friction plate 5 is centrally opened so that the long shaft 4 can pass through.

[0061] Based on the above structure, installation and coordination are performed:

[0062] The 24 friction plates 5 are axially installed in the friction plate installation cavity 301b along the long axis 4, wherein the cross-sectional shape of the friction plate installation cavity 301b is adapted to the shape of the friction plate 5. Therefore, the friction plate 5 rotates with the rotation of the middle housing 3.

[0063] The middle housing 3 is installed in the middle position of the long shaft 4 through the friction plate 5, that is, the long shaft 4 passes through the 24 friction plates 5 and the long shaft 4 is connected with the 24 friction plates 5 in an interference fit. The inner diameter of the metal friction plate 5 is 7.7 mm, the outer diameter of the long shaft 4 is 8 mm, and the two-way interference fit is 0.15 mm.

[0064] A sealing ring 12 and a metal side seal block 13 are installed between the middle mounting part 301 of the middle shell 3 and the left bearing mounting part 101 of the left shell 1, and between the middle mounting part 301 of the middle shell 3 and the right bearing mounting part 201 of the right shell 2. Specifically: the first abutting part 1301 and the second abutting part 1302 of the metal side seal block 13 are installed in the side seal block mounting cavity 301a, and the outer wall shapes of the first abutting part 1301 and the second abutting part 1302 of the metal side seal block 13 are adapted to the inner wall shape of the side seal block mounting cavity 301a; a sealing abutting surface 14 is provided at the connection between the side seal block mounting cavity 301a and the friction plate mounting cavity 301b, and the first abutting part 1301 abuts against the sealing abutting surface 14; the sealing ring 12 is sleeved on the outside of the third abutting part 1303.

[0065] The inner diameter of the large inner diameter installation cavity 9 of the left bearing installation part 101 or the inner diameter of the large inner diameter installation cavity 9 of the right bearing installation part 201 is respectively matched with the outer diameter of the corresponding sealing ring 12. The length of the clamping rib 10 is smaller than the axial length of the large inner diameter installation cavity 9, the length of the clamping rib 10 on the inner wall of the large inner diameter installation cavity 9 is smaller than the axial length of the large inner diameter installation cavity 9, and the opening of one end of the large inner diameter installation cavity 9 away from the sealing ring 12 is aligned with one end of the clamping rib 10. The sealing ring 12 extends into the large inner diameter installation cavity 9 and one side of it abuts against the end of the clamping rib 10, and the other side abuts against the metal side sealing block 13.

[0066] A left one-way bearing 6 is installed between the left housing 1 and the left end of the long shaft 4, and a right one-way bearing 7 is installed between the right housing 2 and the right end of the long shaft 4. The left one-way bearing 6 and the right one-way bearing 7 have the same rotation direction. The left one-way bearing 6 or the right one-way bearing 7 abuts against the third abutment portion 1303. The left one-way bearing 6 is installed in the large inner diameter installation cavity 9, and the outer diameter of the left one-way bearing 6 is larger than the inner diameter of the small inner diameter installation cavity 8 and is smaller than or equal to the inner diameter of the large inner diameter installation cavity 9. A plurality of grooves 11 are provided on the outer wall of the left one-way bearing 6 along its axial direction, and the grooves 11 cooperate with the clamping ribs 10. The long shaft 4 is tightly connected with the inner wall of the left one-way bearing 6, and the long shaft 4 passes through the left one-way bearing 6 and extends into the small inner diameter installation cavity 8. The right one-way bearing 7 is installed in the large inner diameter installation cavity 9, the outer diameter of the right one-way bearing 7 is larger than the inner diameter of the small inner diameter installation cavity 8 and smaller than or equal to the inner diameter of the large inner diameter installation cavity 9, and a plurality of clamping grooves 11 are provided on the outer wall of the right one-way bearing 7 along its axial direction, and the clamping grooves 11 are matched with the clamping ribs 10. The long shaft 4 is tightly connected with the inner wall of the right one-way bearing 7, and the long shaft 4 passes through the right one-way bearing 7 and extends into the small inner diameter installation cavity 8.

[0067] like Figure 3 and 4 As shown, the number of friction plates 5 can be adjusted, that is, from 24 friction plates 5 to 12 friction plates 5, so that the one-way torque can be adjusted. It should be noted that the one-way torque can also be adjusted by adjusting the interference size between the friction plates 5 and the long shaft 4.

[0068] like Figure 2 and 11 As shown, a pin 15 is connected between the left connecting portion 102 of the left shell 1 and the right connecting portion 202 of the right shell 2. The cross section of the pin 15 is set to be T-shaped, and one end of the pin 15 passes through the stepped pin slot 102a and extends into the pin groove 202a.

[0069] Therefore, the hinge product produced in this embodiment can have torque when opening and no torque when closing; or no torque when opening and torque when closing. The product uses the interference fit between the metal friction plate 5 and the long shaft 4 to generate friction, thereby forming torque, and then the torque of the hinge is set by changing the number of friction plates 5: for example, when torque is required for opening, the hinge can have the effect of slowly opening, or can achieve the effect of stopping at any torque value; when closing, it can be closed very smoothly.

[0070] The working process of this embodiment will be further described below:

[0071] The 24 friction plates 5 are installed in the friction plate installation cavity 301 b of the middle housing 3 .

[0072] The long shaft 4 penetrates through and is interference-connected with the 24 friction plates 5 . The metal side sealing blocks 13 pass through the long shaft 4 and are installed at both ends of the middle connecting portion 302 of the middle housing 3 to perform side sealing at both ends.

[0073] The sealing ring 12 is put on the third abutting portion 1303 of the metal side sealing block 13 , and one-way bearings (ie, the left one-way bearing 6 and the right one-way bearing 7 ) are installed at both ends of the long shaft 4 so that the one-way bearings abut against the third abutting portion 1303 .

[0074] Install the left housing 1 and the right housing 2 along the slot 11 on the outer wall of the one-way bearing.

[0075] A pin 15 is installed between the left housing 1 and the right housing 2 .

[0076] When rotating in the direction without torque force, relative movement occurs between the one-way bearing and the long shaft 4; when rotating in the direction with torque force, the one-way bearing and the long shaft 4 are locked.

[0077] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-way torque hinge with adjustable torque force, characterized in that: It comprises a long axis (4), at least one first shell and at least one second shell; The long shaft (4) is interference-connected with N friction plates (5), wherein N≥1; The friction plate (5) is installed in the friction plate installation cavity (301b) of the first housing, and the friction plate (5) rotates along with the rotation of the first housing; A one-way bearing is installed between the long shaft (4) and the second housing.

2. A one-way torque hinge with adjustable torque force as claimed in claim 1, characterized in that: One end of the friction plate (5) is rectangular and the other end is arc-shaped, and the cross-sectional shape of the friction plate mounting cavity (301b) is adapted to the shape of the friction plate (5).

3. A one-way torque hinge with adjustable torque force as claimed in claim 2, characterized in that: The number of the first housing is one and is a middle housing (3), and the middle housing (3) is installed at the middle position of the long shaft (4) via N friction plates (5); The number of the second housings is two and the two second housings are respectively a left housing (1) and a right housing (2); a left one-way bearing (6) is installed between the left housing (1) and the left end of the long shaft (4); and a right one-way bearing (7) is installed between the right housing (2) and the right end of the long shaft (4); The left one-way bearing (6) and the right one-way bearing (7) rotate in the same direction.

4. A one-way torque hinge with adjustable torque force as claimed in claim 3, characterized in that: The left housing (1) comprises a left bearing mounting portion (101) and a left connecting portion (102) which are integrally arranged; The left bearing mounting portion (101) is provided with a stepped mounting cavity, the stepped mounting cavity comprising a small inner diameter mounting cavity (8) and a large inner diameter mounting cavity (9) arranged in sequence, and a plurality of clamping ribs (10) are evenly distributed on the inner wall of the large inner diameter mounting cavity (9); The left one-way bearing (6) is installed in the large inner diameter installation cavity (9), the outer diameter of the left one-way bearing (6) is larger than the inner diameter of the small inner diameter installation cavity (8) and smaller than or equal to the inner diameter of the large inner diameter installation cavity (9), and a plurality of grooves (11) are provided on the outer wall of the left one-way bearing (6) along its axial direction, and the grooves (11) are matched with the retaining ribs (10); The long shaft (4) is tightly connected to the inner wall of the left one-way bearing (6); the long shaft (4) passes through the left one-way bearing (6) and extends into the small inner diameter installation cavity (8).

5. The one-way torque hinge with adjustable torque force as claimed in claim 3, characterized in that: The right housing (2) comprises a right bearing mounting portion (201) and a right connecting portion (202) which are integrally arranged; The right bearing mounting portion (201) is provided with a stepped mounting cavity, the stepped mounting cavity comprising a small inner diameter mounting cavity (8) and a large inner diameter mounting cavity (9) arranged in sequence, a plurality of retaining ribs (10) are arranged on the inner wall of the large inner diameter mounting cavity (9), and the length of the retaining ribs (10) is less than the axial length of the large inner diameter mounting cavity (9); The right one-way bearing (7) is installed in the large inner diameter installation cavity (9), the outer diameter of the right one-way bearing (7) is larger than the inner diameter of the small inner diameter installation cavity (8) and smaller than or equal to the inner diameter of the large inner diameter installation cavity (9), and a plurality of grooves (11) are provided on the outer wall of the right one-way bearing (7) along its axial direction, and the grooves (11) are matched with the retaining ribs (10); The long shaft (4) is tightly connected to the inner wall of the right one-way bearing (7), and the long shaft (4) passes through the right one-way bearing (7) and extends into the small inner diameter installation cavity (8).

6. A one-way torque hinge with adjustable torque force as claimed in claim 3, characterized in that: The middle housing (3) comprises an integrally arranged middle mounting portion (301) and a middle connecting portion (302); the middle mounting portion (301) is provided with a side seal block mounting cavity (301a) and a friction plate mounting cavity (301b); the side seal block mounting cavity (301a) is symmetrically arranged on both sides of the friction plate mounting cavity (301b); and the N friction plates (5) are axially mounted in the friction plate mounting cavity (301b) along the long axis (4).

7. A one-way torque hinge with adjustable torque force as claimed in claim 6, characterized in that: A sealing ring (12) and a metal side sealing block (13) are installed between the middle mounting portion (301) and the left bearing mounting portion (101) of the left housing (1), and between the middle mounting portion (301) and the right bearing mounting portion (201) of the right housing (2); The metal side seal block (13) is installed in the side seal block installation cavity (301a), one side of the metal side seal block (13) abuts against the side opening of the friction plate installation cavity (301b), and the other side abuts against the sealing ring (12); The left bearing mounting portion (101) or the right bearing mounting portion (201) is respectively in contact with the corresponding sealing ring (12).

8. A one-way torque hinge with adjustable torque force as claimed in claim 7, characterized in that: The inner diameter of the large inner diameter installation cavity (9) of the left bearing installation portion (101) or the inner diameter of the large inner diameter installation cavity (9) of the right bearing installation portion (201) is respectively matched to the outer diameter of the corresponding sealing ring (12); The length of the clamping rib (10) on the inner wall of the large inner diameter installation cavity (9) is smaller than the axial length of the large inner diameter installation cavity (9), and the opening of one end of the large inner diameter installation cavity (9) away from the sealing ring (12) is aligned with one end of the clamping rib (10); The sealing ring (12) extends into the large inner diameter installation cavity (9) and abuts against the end of the clamping rib (10) on one side and abuts against the metal side sealing block (13) on the other side.

9. The one-way torque hinge with adjustable torque force as claimed in claim 7, characterized in that: The metal side sealing block (13) comprises a first abutting portion (1301), a second abutting portion (1302) and a third abutting portion (1303) which are connected in sequence; The cross section of the first abutting portion (1301) is rectangular at one end and arc-shaped at the other end; The cross section of the second abutting portion (1302) is rectangular at one end and arc-shaped at the other end; The cross-sectional shape of the third abutting portion (1303) is circular; The first abutting portion (1301) and the second abutting portion (1302) of the metal side sealing block (13) are installed in the side sealing block installation cavity (301a), and the outer wall shapes of the first abutting portion (1301) and the second abutting portion (1302) of the metal side sealing block (13) are adapted to the inner wall shape of the side sealing block installation cavity (301a); A sealing abutment surface (14) is provided at the connection between the side seal block installation cavity (301a) and the friction plate installation cavity (301b), and the first abutment portion (1301) abuts against the sealing abutment surface (14); The sealing ring (12) is sleeved on the outside of the third abutting portion (1303); The left one-way bearing (6) or the right one-way bearing (7) abuts against the third abutment portion (1303).

10. The one-way torque hinge with adjustable torque force as claimed in claim 3, characterized in that: A pin (15) is connected between the left connecting portion (102) of the left housing (1) and the right connecting portion (202) of the right housing (2); a pin groove (202a) is provided on the back of the right connecting portion (202); a stepped pin through groove (102a) is provided on the left connecting portion (102); the cross section of the pin (15) is set to be T-shaped; one end of the pin (15) passes through the stepped pin through groove (102a) and extends into the pin groove (202a).

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