CN213477967U

CN213477967U - Reliable hinge

Info

Publication number: CN213477967U
Application number: CN202022243420.6U
Authority: CN
Inventors: 乐嘉欣
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-11
Filing date: 2020-10-11
Publication date: 2021-06-18
Anticipated expiration: 2030-10-11

Abstract

The utility model relates to a reliable hinge. The utility model discloses a reliable hinge, which comprises a first hinge body provided with a fixed part and a second hinge body provided with a rotating part; the hinge shaft assembly is further included; the hinge shaft assembly comprises an inner sleeve fixedly connected with the rotating part, and a transmission part, a direction changing part, a buffer part, a plugging part and a reset elastic part are arranged in the inner sleeve; the transmission part is provided with a transmission pin, and the buffer part is connected with a buffer pin; the transmission part is hinged with the direction-changing part; the transmission pin is embedded into the turning groove, and the buffer pin is embedded into the buffer groove; the buffer part is a hydraulic cylinder which is fixedly connected with the direction-changing part; the two ends of the reset elastic piece are respectively connected with the plug piece and the direction-changing piece. The utility model can achieve the advantages of convenient assembly of the hinge shaft assembly, simple structure and high reliability; the stress between the transmission part and the direction changing part can be balanced, and the service life is ensured; the stress balance between the transmission part and the turning part can be realized, the service life is ensured, and the processing cost is lower.

Description

Reliable hinge

Technical Field

The utility model relates to a hardware fitting technical field, in particular to reliable hinge.

Background

The existing hinge with the buffering function is usually that after an inner sleeve is installed on a first hinge body and a second hinge body through a wire, hydraulic oil is injected into the inner sleeve, and meanwhile, the inner sleeve needs to be sealed, so that the existing hinge with the buffering function is very troublesome to assemble, low in reliability, very high in skill dependence on operators, and high in labor cost.

The existing hinge with the buffering function cannot adjust the buffering position.

In summary, the prior art has at least the following technical problems,

first, assembly is cumbersome.

Second, the buffer position cannot be adjusted.

Thirdly, the reliability is low.

Disclosure of Invention

An object of the utility model is to solve or alleviate the above-mentioned first technical problem.

The utility model adopts the measure that the reliable hinge comprises a first hinge body provided with a fixed part and a second hinge body provided with a rotating part; the hinge shaft assembly is further included; the hinge shaft assembly comprises an inner sleeve fixedly connected with the rotating part, and a transmission part, a direction changing part, a buffer part, a plugging part and a reset elastic part are arranged in the inner sleeve; the transmission piece is provided with a transmission pin, and one end of the transmission pin is fixedly connected with the fixing part; the direction changing piece is provided with an inclined direction changing groove and a buffer groove which is axially arranged; the buffer piece is provided with a buffer pin; the transmission part is hinged with the direction-changing part; the transmission pin is embedded into the turning groove, and the buffer pin is embedded into the buffer groove; the buffer part is a hydraulic cylinder which is fixedly connected with the direction-changing part; the two ends of the reset elastic piece are respectively connected with the plug piece and the direction-changing piece.

The utility model discloses the function of realization does, can make driving medium, diversion piece, pneumatic cylinder connect for interconnect's subassembly, again with the subassembly of interconnect insert the equipment that can accomplish hinge axle subassembly in the inner skleeve.

The utility model discloses the effect that reaches does, and the hinge axle subassembly's of being convenient for equipment is improved one by one, and the structure is fairly simple, and the reliability is higher.

According to a further technical scheme, the reset elastic piece is a spring for providing repulsive force, and two ends of the reset elastic piece are respectively abutted against the plug piece and the direction changing piece; or the reset elastic piece is a spring for providing tension, and two ends of the reset elastic piece are respectively and fixedly connected with the plug piece and the direction-changing piece.

The hinge can be opened respectively to the hinge, the hinge is closed and provides elasticity and realize reseing, realizes laborsaving.

According to the technical scheme, the hydraulic cylinder is fixedly provided with a hydraulic cylinder pin, the direction changing piece is provided with a hydraulic cylinder hole, and the hydraulic cylinder pin is inserted into the hydraulic cylinder hole.

The hinge shaft assembly is convenient to assemble.

According to the further technical scheme, the hydraulic cylinder pin is connected with the hydraulic cylinder in an inserting mode.

The hydraulic cylinder pin can be inserted into the hydraulic cylinder after being pulled out of the hydraulic cylinder, so that the hinge shaft assembly is convenient to assemble.

According to the further technical scheme, the turning grooves are more than two and are parallel to each other, and the transmission pins are embedded into the turning grooves respectively.

The stress balance between the transmission part and the turning part can be realized, and the service life is ensured.

According to a further technical scheme, the number of the turning grooves is two, and a connecting line between one ends of the turning grooves, which are close to the transmission piece, approximately penetrates through the axis line of the turning piece.

The stress balance between the transmission part and the turning part can be realized, the service life is ensured, and the processing cost is lower.

According to a further technical scheme, the number of the turning grooves is two, and a connecting line between one ends of the turning grooves, which are far away from the transmission piece, approximately penetrates through an axis line of the turning piece.

When the device is in the limit position, the transmission pin is simultaneously positioned at one end of the turning groove, which is far away from the transmission part, so that the turning part is balanced in stress, and the reliability is improved.

According to the further technical scheme, two ends of the transmission pin are respectively embedded into the turning grooves.

The driving pin is one, so that the cost can be reduced.

According to the further technical scheme, the buffer pin is abutted or inserted with the buffer piece.

The driving pin can be inserted into the hydraulic cylinder after being pulled out of the hydraulic cylinder, so that the hinge shaft assembly is convenient to assemble.

According to the further technical scheme, the buffer piece is abutted or inserted with the buffer pin.

One-way buffering of opening/closing the leaflet or two-way buffering of opening and closing the leaflet can be achieved.

In conclusion, the utility model can achieve the following technical effects,

1, the hinge shaft assembly is convenient to assemble, the structure is simple, and the reliability is high.

2, the stress between the transmission part and the direction changing part can be balanced, and the service life is ensured.

3, the stress between the transmission part and the direction changing part can be balanced, and the machining cost is lower while the service life is ensured.

Drawings

Figure 1 is a schematic perspective view of a hinge according to a first embodiment.

Fig. 2 is a perspective exploded view of the hinge according to the first embodiment.

Fig. 3 is a schematic view of the hinge shaft assembly 3 and the adjustment member 4 according to the first embodiment.

Fig. 4 is an exploded perspective view of the hinge shaft assembly 3 and the adjuster 4 according to the first embodiment.

Figure 5 is a schematic semi-sectional view of the hinge shaft assembly 3 and the adjustment member 4 according to the first embodiment.

Figure 6 is a schematic half-section of the hinge shaft assembly 3 and the adjustment member 4 according to the first embodiment; the section plane is rotated ninety degrees relative to the section plane of fig. 5.

Figure 7 is a schematic perspective half-section of a hinge according to a first embodiment.

Fig. 8 is a perspective view of the transmission member 31, the direction changing member 32, and the buffer member 33 according to the second embodiment.

Fig. 9 is an exploded perspective view of the transmission member 31, the direction changing member 32, and the buffer member 33 according to the second embodiment.

FIG. 10 is a schematic view of the direction change member 32 according to the second embodiment after it has been flattened; LINE one LINE1 represents the center LINE of the diversion slot 321.

Figure 11 is a perspective view of another embodiment of a plug member 34.

LINE one LINE 1; a first hinge body 1; a fixed part 11; a fixing member 111; a fixing hole 112; a balance section 19; a balance bearing 191; a second hinge body 2; a rotating section 21; a hinge shaft assembly 3; a transmission member 31; a drive pin 311; a positioning stage 318; a drive bearing 319; a direction changing member 32; a turning groove 321; a buffer tank 323; hydraulic cylinder bores 328; end distance 329. A buffer member 33; a hydraulic cylinder 331; a cushion pin 332; a cylinder pin 338; a bumper plunger 339; a plug member 34; a plug groove 341; a balance bearing post 349; a return elastic member 35; an inner sleeve 39; a stopper protrusion 391; a process tank 399; an adjustment structure 4; the rotation adjusting member 41; a screw 411; an operation end 412; the adjustment ramp 42; the adjusting movable teeth 43; a tooth end face 431; a tooth clamp position 432; and a hinge bearing 9.

Detailed Description

The following description will be made in conjunction with the accompanying drawings.

The term "axial" hereinafter refers to a direction parallel to the axis of the lumen of the inner sleeve 39.

A first embodiment.

The hinge of the first embodiment includes a first hinge body 1 provided with a fixing portion 11, and a second hinge body 2 provided with a rotating portion 21. The fixed portion 11 and the rotating portion 21 are generally cylindrical as a whole. Generally, the first hinge body 1 and the second hinge body 2 are both provided with mounting holes (not shown in the drawings) for fixedly connecting with glass doors, wooden doors and the like.

Also comprises a hinge shaft component 3; the hinge shaft assembly 3 includes an inner sleeve 39 fixedly connected to the rotating portion 21, and the driving member 31, the direction changing member 32, the buffer member 33, and the stopper member 34 are provided in the inner sleeve 39.

The transmission member 31 is provided with a transmission pin 311, and one end of the transmission member 31 is fixedly connected with the fixing portion 11.

Preferably, a fixing member 111 is fixedly disposed in the fixing portion 11, the fixing member 111 is provided with a fixing hole 112, and one end of the transmission member 31 is inserted into the fixing hole 112, so that one end of the transmission member 31 is fixedly connected to the fixing portion 11. Generally, the driving pin 311 and the fixing hole 112 are the same in a plane taken perpendicular to the axial direction, and are both long hole-shaped (i.e., a circle is formed by removing two circular segments, and two parallel straight lines are formed on the circle). The installation can be completed only by embedding the driving pin 311 into the fixing hole 112, which is convenient for assembly.

Further, a fixing protrusion (not shown) is fixedly disposed on a sidewall of the fixing member 111. The plane of the fixing projection taken by a plane perpendicular to the axial direction is triangular, and the inner diameter of the fixing portion 11 is smaller than the distance from the fixing projection to the axis of the fixing member 111. Normally, a bolt may be screwed into the fixing portion 11 and the fixing member 111 perpendicularly to the axial direction to achieve further reinforcement. Can realize the fixed connection of mounting 111 and fixed part 11 through interference fit's mode, be convenient for assemble.

The direction changing member 32 is provided with an inclined direction changing groove 321 (that is, when the direction changing member 32 is flat, a distance difference exists between two ends of the direction changing groove 321 in an axial direction, and the two ends of the direction changing groove 321 are respectively located at axial extreme positions; for example, a center line of the direction changing groove 321 may be a straight line, or may also be a continuous curve such as an arc line, so that no point on the center line of the direction changing groove 321 exceeds the two ends of the direction changing groove 321 in the axial direction) and an axially arranged buffer groove 323.

The buffer member 33 is connected with a buffer pin 332. The cushion member 33 is a damper member that can generate a damping force, typically, such as the hydraulic cylinder 331. In one embodiment, the buffer member 33 abuts against the buffer pin 332, so that the buffer pin 332 is connected to the buffer member 33. When the hinge is opened or closed, the buffer member 33 can provide buffer force, so that unidirectional buffering for opening or closing the hinge is realized, and convenience is provided.

The transmission member 31 is hinged to the direction-changing member 32. Normally, the transmission element 31 is inserted into the direction-changing element 32 to effect articulation.

The driving pin 311 is fitted into the direction changing groove 321, and the buffer pin 332 is fitted into the buffer groove 323.

The plug 34 is fixedly connected to the inner sleeve 39 and abuts against the damper 33.

Preferably, the buffer pin 332 is inserted into the buffer 33; the driving pin 311 is inserted into the driving member 31.

The working principle is that before the door is used, the first hinge body 1 and the second hinge body 2 are respectively fixedly connected with a fixed object (such as a wall and the like) and a door leaf.

When the door leaf is opened or closed, the first hinge body 1 and the transmission member 31 are opposite to the second hinge body 2, the transmission pin 311 abuts against the inner wall of the direction changing groove 321 to enable the direction changing member 32 to move axially until one end of the buffer groove 323 abuts against the buffer pin 332, and the buffer member 33 provides damping force to achieve buffering.

During assembly, the transmission piece 31 is inserted into the direction changing piece 32, the transmission pin 311 is inserted into the transmission piece 31, the buffer piece 33 is inserted into the direction changing piece 32, and the buffer pin 332 is inserted into the buffer piece 33; can make driving medium 31, diversion 32, bolster 33 connect for interconnect's subassembly, insert the subassembly of interconnect again in inner skleeve 39 and can accomplish hinge axle subassembly 3's equipment, need not to annotate liquid in the inner skleeve 39 again in addition, the hinge axle subassembly 3's of being convenient for equipment.

Further, the inner sleeve 39 is provided with a plug protrusion 391 and a process groove 399 corresponding to the plug protrusion 391, the plug member 34 is provided with a plug groove 341, and the plug protrusion 391 is embedded in the plug groove 341, so that the plug member 34 is fixedly connected with the inner sleeve 39. Generally, the stopper protrusion 391 is held against the inner sleeve 39 by a pressing device of the inner sleeve 39, such that the inner sleeve 39 deforms to form the stopper protrusion 391 and the process groove 399. Facilitating assembly between the inner sleeve 39 and the plug member 34.

Furthermore, the device also comprises a reset elastic part 35, and two ends of the reset elastic part 35 are respectively connected with the plug part 34 and the direction changing part 32. Preferably, the return elastic element 35 is a spring providing a repulsive force, and two ends of the return elastic element respectively abut against the plug element 34 and the direction-changing element 32; certainly, the elastic return element 35 is a spring providing tension, and both ends of the elastic return element are fixedly connected with the plug element 34 and the direction-changing element 32 respectively, which is also possible; the return elastic element 35 can also be connected to the stopper element 34 by abutting against the rotary adjustment element 41; the hinge can be opened respectively to the hinge, the hinge is closed and provides elasticity and realize reseing, realizes laborsaving.

Further, the first hinge body 1 is further provided with a balance portion 19, and the balance portion 19 and the fixing portion 11 are respectively located on both sides of the rotating portion 21. The inner sleeve 39 may be inserted into the balance portion 19 to be hinged to the balance portion 19, and may be hinged to the balance portion 19 via a bearing without being inserted into the balance portion 19. The hinge shaft assembly 3 can be stressed in a balanced manner, and the service life is prolonged.

Preferably, the plug member 34 is provided with a balance bearing column 349 extending from the inner sleeve 39, and a balance bearing 191 is fixedly arranged (for example, fixed by interference fit) in the balance portion 19; the inner race of balance bearing 191 is coupled to balance bearing post 349. The service life is prolonged, and meanwhile, the first hinge body 1 and the second hinge body 2 can be ensured to rotate smoothly.

The hinge adjusting structure of the first embodiment comprises a plug piece 34 and an adjusting structure 4, wherein the adjusting structure 4 comprises a rotary adjusting piece 41 hinged to the plug piece 34, the rotary adjusting piece 41 is provided with at least one adjusting inclined surface 42, the plug piece 34 is provided with an adjusting moving tooth 43, and the adjusting moving tooth 43 abuts against the adjusting inclined surface 42.

The operation principle is that before use, the plug 34 and the rotation adjuster 41 are mounted in the inner sleeve 39, the plug 34 and the inner sleeve 39 are fixed, and the rotation adjuster 41 abuts against the cushion member 33.

When the buffering position needs to be adjusted, the rotating adjusting member 41 is rotated, and the adjusting moving tooth 43 abuts against the adjusting inclined surface 42 and slides along the adjusting inclined surface 42, so that the abutting position of the adjusting moving tooth 43 and the adjusting inclined surface 42 and the rotating adjusting member 41 are displaced and maintained in the axial direction (for example, the rotating adjusting member can be maintained by the friction force between the adjusting moving tooth 43 and the adjusting inclined surface 42), and the buffering position can be conveniently adjusted.

Preferably, the adjustment ramp 42 is a flat surface. The adjustment inclined surface 42 can be formed by one milling process, which facilitates the processing and manufacturing of the rotary adjustment member 41.

Preferably, the adjusting movable teeth 43 are provided with a flat surface to be engaged with the adjusting inclined surface 42.

Preferably, the number of the adjusting inclined surfaces 42 is two or more, and the adjusting inclined surfaces are uniformly distributed around the hinge axis of the plug member 34 and the adjusting structure 4, and the adjusting moving teeth 43 respectively abut against the adjusting inclined surfaces 42. The rotary adjusting piece 41 can be uniformly stressed around the hinge axis of the plug piece 34 and the adjusting structure 4, and the rotary adjusting piece 41 is prevented from being axially skewed and being clamped in the inner sleeve 39.

Further, the rotation adjusting member 41 is fixedly provided with a screw 411, and the screw 411 is screwed into the plug member 34, so that the plug member 34 is hinged with the rotation adjusting member 41. The position of the rotation adjusting member 41 can be maintained by means of the friction force on the thread of the screw 411, and the rotation adjusting member 41 is prevented from being reset under the action of the buffer member 33 and/or the reset elastic member 35.

Further, the pitch of the thread of the screw 411 is smaller than the axial distance of the adjusting movable tooth 43 moving along the adjusting inclined surface 42 when the rotary adjusting member 41 rotates relative to the plug member 34 for one circle. The adjusting movable tooth 43 can be ensured to be axially displaced by means of the abutment with the adjusting inclined surface 42, so that the buffering position can be quickly adjusted.

Further, one end (i.e., the operating end 412) of the threaded rod 411 extends from the plug member 34. It is convenient to rotate the rotation adjusting member 41 by one end of the screw 411.

Further, one end (i.e., the operation end 412) of the screw 411 has a special-shaped cross section (e.g., a shape other than a circle such as a square, a regular hexagon, a triangle, etc.).

Further, one end (i.e., the operation end 412) of the screw 411 has a regular hexagonal cross section. It is convenient to rotate the rotation adjusting member 41 by a tool such as a socket or a wrench.

A second embodiment.

A hinge of a second embodiment, which includes a first hinge body 1 provided with a fixing portion 11, and a second hinge body 2 provided with a rotating portion 21; also comprises a hinge shaft component 3; the hinge shaft assembly 3 comprises an inner sleeve 39 fixedly connected with the rotating part 21, and a transmission part 31, a direction changing part 32, a buffer part 33, a plugging part 34 and a reset elastic part 35 are arranged in the inner sleeve 39; the transmission member 31 is provided with a transmission pin 311, and one end of the transmission member 31 is fixedly connected with the fixing part 11; the direction changing piece 32 is provided with an inclined direction changing groove 321 and a buffer groove 323 arranged axially; the cushion member 33 is connected with a cushion pin 332; the transmission piece 31 is hinged with the direction changing piece 32; the driving pin 311 is fitted into the direction changing groove 321, and the buffer pin 332 is fitted into the buffer groove 323.

The buffer member 33 is a hydraulic cylinder 331, and the hydraulic cylinder 331 is fixedly connected with the direction changing member 32; two ends of the elastic resetting piece 35 are respectively connected with the plug piece 34 and the direction changing piece 32.

When the door leaf is opened or closed, the first hinge body 1 and the transmission member 31 are opposite to the second hinge body 2, the transmission pin 311 abuts against the inner wall of the direction changing groove 321 to enable the direction changing member 32 to move axially until one end of the buffer groove 323 abuts against the buffer pin 332, and the hydraulic cylinder 331 provides damping force to achieve bidirectional buffering of opening and closing of the door. The elastic piece 35 that resets can open and the hinge is closed to the hinge and provide elasticity and realize resetting, realizes laborsaving.

During assembly, the hydraulic cylinder 331 is inserted into the direction changer 32 and the cushion pin 332 is inserted into the hydraulic cylinder 331; the transmission member 31 is inserted into the direction-changing member 32, the transmission pin 311 is inserted into the transmission member 31, the direction-changing member 32 and the hydraulic cylinder 331 can be connected into mutually connected components, the mutually connected components are inserted into the inner sleeve 39, the hinge shaft assembly 3 can be assembled, liquid does not need to be injected into the inner sleeve 39, and accordingly the hinge shaft assembly 3 can be assembled conveniently.

Preferably, the return elastic element 35 is a spring providing a repulsive force, and two ends of the return elastic element respectively abut against the plug element 34 and the direction-changing element 32; certainly, the elastic return element 35 is a spring providing tension, and both ends of the elastic return element are fixedly connected with the plug element 34 and the direction-changing element 32 respectively, which is also possible; the hinge can be opened respectively to the hinge, the hinge is closed and provides elasticity and realize reseing, realizes laborsaving.

Further, a hydraulic cylinder pin 338 is fixedly arranged on the hydraulic cylinder 331, a hydraulic cylinder hole 328 is arranged on the direction changing piece 32, and the hydraulic cylinder pin 338 is inserted into the hydraulic cylinder hole 328; so that the hydraulic cylinder 331 is fixedly connected to the direction-changing member 32. The assembly of hinge shaft assembly 3 is facilitated.

Further, a cylinder pin 338 is inserted into the cylinder 331. The cylinder pin 338 can be inserted into the cylinder 331 after being extracted from the cylinder 331, thereby facilitating the assembly of the hinge shaft assembly 3.

Further, the number of the turning grooves 321 is two or more and parallel to each other, and the driving pins 311 are respectively inserted into the turning grooves 321. The stress between the transmission part 31 and the direction changing part 32 can be balanced, and the service life is ensured.

Preferably, there are two turning grooves 321, and a connecting line between ends of the turning grooves 321 close to the transmission member 31 passes through the axis of the turning member 32 approximately (i.e., when the turning member 32 is flat, the end distance 329 is half of the outer diameter of the turning member 32 multiplied by the circumferential ratio). The stress balance between the transmission part 31 and the direction changing part 32 can be realized, the service life is ensured, and the processing cost is lower.

Preferably, there are two turning grooves 321, and a connecting line between ends of the turning grooves 321 far away from the transmission member 31 substantially passes through the axis of the turning member 32. In the extreme position (i.e. when the driving pin 311 is located at both ends of the turning groove 321), the driving pin 311 is located at the end of the turning groove 321 far away from the driving member 31, so that the turning member 32 is stressed in a balanced manner, which is beneficial to improving the reliability.

Further, both ends of the driving pin 311 are respectively inserted into the direction-changing grooves 321. The cost can be reduced by having one driving pin 311.

Further, the driving pin 311 is inserted into the hydraulic cylinder 331. The drive pin 311 can be inserted into the hydraulic cylinder 331 after being extracted from the hydraulic cylinder 331, thereby facilitating the assembly of the hinge shaft assembly 3.

In the plug member 34 of the other embodiment, the fixed teeth 43 are provided with a tooth end face 431 in a plane; the tooth end face 431 is provided with a tooth position stop 432. As used in the present invention, the term: first, second, etc. do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

As used in the present invention, the term: one, etc. do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.

As in the present invention, the term indicating orientation or position is used: top, bottom, side, longitudinal, lateral, middle, center, outer, inner, horizontal, vertical, left, right, above, below, and the like are intended to reflect relative positions, not absolute positions.

The term as used in the present invention: approximate, whole, approximate, close, etc., are words of definition that specify the presence of stated features but allow for certain deviations. The amount of tolerance for a certain deviation may vary depending on the particular context; for example, the specific context in which deviations from size may be relied upon includes, but is not limited to, national standards for dimensional tolerances.

Claims

1. A reliable hinge comprising a first hinge body (1) provided with a fixed part (11), and a second hinge body (2) provided with a rotating part (21); also comprises a hinge shaft component (3); the hinge shaft assembly (3) comprises an inner sleeve (39) fixedly connected with the rotating part (21), and a transmission part (31), a direction changing part (32), a buffer part (33), a plug part (34) and a reset elastic part (35) are arranged in the inner sleeve (39); the transmission piece (31) is provided with a transmission pin (311), and one end of the transmission pin (311) is fixedly connected with the fixing part (11); the direction changing piece (32) is provided with an inclined direction changing groove (321) and a buffer groove (323) which is arranged axially; the buffer piece (33) is connected with a buffer pin (332); the transmission piece (31) is hinged with the direction changing piece (32); the driving pin (311) is embedded into the turning groove (321), and the buffer pin (332) is embedded into the buffer groove (323); it is characterized in that the utility model is characterized in that,

the buffer piece (33) is a hydraulic cylinder (331), and the hydraulic cylinder (331) is fixedly connected with the direction changing piece (32); two ends of the reset elastic piece (35) are respectively connected with the plug piece (34) and the direction changing piece (32).

2. A positive hinge according to claim 1, wherein the return elastic element (35) is a spring providing a repulsion force and has two ends respectively abutting against the blocking element (34) and the direction-changing element (32); or the reset elastic piece (35) is a spring providing tension, and two ends of the reset elastic piece are respectively and fixedly connected with the plug piece (34) and the direction changing piece (32).

3. Reliable hinge according to claim 1, characterized in that the hydraulic cylinder (331) is fixedly provided with a hydraulic cylinder pin (338), the direction-changing element (32) is provided with a hydraulic cylinder hole (328), and the hydraulic cylinder pin (338) is inserted into the hydraulic cylinder hole (328).

4. Reliable hinge according to claim 1, characterized in that the hydraulic cylinder pin (338) is inserted in the hydraulic cylinder (331).

5. The secure hinge as claimed in claim 1, wherein the direction-changing grooves (321) are two or more parallel to each other, and the driving pins (311) are respectively inserted into the direction-changing grooves (321).

6. The secure hinge as claimed in claim 1, wherein the direction-changing groove (321) is two and a line connecting one end of the direction-changing groove (321) close to the transmission member (31) passes substantially through the axis of the direction-changing member (32).

7. The secure hinge as claimed in claim 1, wherein the direction-changing groove (321) is two and a line connecting one end of the direction-changing groove (321) remote from the transmission element (31) passes substantially through the axis of the direction-changing element (32).

8. Secure hinge according to claim 1, characterized in that the two ends of the driving pin (311) are respectively inserted in the diversion groove (321).

9. Reliable hinge according to claim 1, characterized in that the driving pin (311) is inserted in a hydraulic cylinder (331).

10. Reliable hinge according to claim 1, characterised in that the damping pin (332) is in abutment with or inserted into the damping element (33).