CN111852234A - Heavy buffer hinge - Google Patents

Abstract

The invention relates to a heavy buffer hinge which comprises a hinged cup, a rocker, a hinged arm, a base and a crankshaft, wherein the hinged arm is arranged on the base, two ends of the rocker and the crankshaft are respectively hinged with the hinged cup and the hinged arm, the hinged arm is also provided with an elastic energy storage assembly and a damper, the elastic energy storage assembly comprises a fixed seat, an elastic piece and a sliding piece, the fixed seat is connected with the hinged arm, the elastic piece is positioned between the fixed seat and the sliding piece, the rear ends of the crankshaft and the rocker are respectively provided with a swinging part, when the hinged cup rotates and opens relative to the hinged arm, the swinging part of the crankshaft can push the sliding piece to move towards the rear end of the hinged arm, meanwhile, the sliding piece compresses the elastic piece, and when the hinged cup rotates and closes relative to the hinged arm, the swinging part of. According to the invention, the elastic energy storage assembly provides closing force for the hinge cup, so that the assembly difficulty of the hinge is reduced, the assembly efficiency is improved, the silencing effect is good during door opening and closing, the door closing buffer function is also realized, and the cabinet door is prevented from being collided with the cabinet body vigorously.

Description

Heavy buffer hinge

Technical Field

The invention belongs to the technical field of hinges, and particularly relates to a heavy buffer hinge.

Background

The existing furniture door hinge generally presses the connecting rod and the crankshaft through two elastic arms (extending ends) of a torsion spring, so that a hinged cup has a closing force, such as the hinge disclosed in chinese patent publication No. CN 107905661A. This kind of adopt the torsional spring to provide the hinge of closing force, its torsional spring assembly degree of difficulty is high, and no matter the hinge cup is opening or closed process, and two elastic arms of torsional spring all can find relative slip with connecting rod and bent axle to because the friction produces the noise.

Disclosure of Invention

In view of the deficiencies of the prior art, it is an object of the present invention to provide a heavy duty cushioned hinge that is simple to assemble.

In order to achieve the purpose, the invention adopts the technical scheme that: a heavy buffer hinge comprises a hinged cup, a rocker, a hinged arm, a base and a crankshaft, wherein the hinged arm is arranged on the base, a first shaft hole is formed in the front end of the rocker, a second shaft hole is formed in the rear end of the rocker, a third shaft hole is formed in the front end of the crankshaft, a fourth shaft hole is formed in the rear end of the crankshaft, the front end of the rocker is hinged with the hinged cup through the first shaft hole by a first hinge shaft, the rear end of the rocker is hinged with the hinged arm through the second shaft hole by a second hinge shaft, the front end of the crankshaft is hinged with the hinged cup through the third shaft hole by a third hinge shaft, the rear end of the crankshaft is hinged with the hinged arm through the fourth shaft hole by a fourth hinge shaft, the hinged arm is further provided with an elastic energy storage assembly, the elastic energy storage assembly comprises a fixed seat, an elastic piece and a sliding piece, the fixed seat is connected with the hinged arm, the elastic piece is positioned between the fixed seat, when the hinged cup rotates and opens relative to the hinged arm, the crankshaft swinging part of the crankshaft can push the sliding part to move towards the rear end direction of the hinged arm, and meanwhile, the sliding part compresses the elastic part.

In the above-mentioned scheme, when the relative hinge arm of hinge cup rotates and opens, the bent axle rotates and drives the bent axle swing portion of its rear end around the swing of fourth articulated shaft, bent axle swing portion swing in-process and promote the slider to remove to hinge arm rear end direction, the realization is to the elastic component compression, the elastic component is compressed the back and realize the energy storage, at this moment, when needs are closed the door, automatic re-setting after the elastic component is compressed, thereby promote the slider to remove to hinge arm front end direction, promote bent axle swing portion simultaneously around the reverse swing of fourth articulated shaft, thereby drive bent axle and rocker rotate around the circle and make the relative hinge arm of hinge cup rotate the closure, realize the automatic effect of closing the door. According to the hinge cup, the elastic energy storage assembly provides closing force for the hinge cup, and a torsion spring is not needed to provide the closing force, so that the assembly difficulty of the hinge is reduced, and the assembly efficiency is improved.

Furthermore, the hinge arm is further provided with a damper, the rear end of the rocker is further provided with a rocker swinging part, when the hinge cup rotates and closes relative to the hinge arm, the rocker swinging part of the rocker can compress the damper, and due to the damping effect of the damper, the hinge cup slowly rotates along the closing direction, so that the door closing process is slowly performed, and the cabinet door is prevented from being collided with the cabinet body vigorously.

Furthermore, the rear end of the damper is fixed on the fixed seat, so that the damper is convenient to mount, the front end of the damper is provided with the push block, when the hinged cup rotates and closes relative to the hinged arm, the swinging part of the rocker and the push block slide relatively and push the push block to move towards the rear end direction of the hinged arm to compress the damper, and when the hinged cup rotates and opens relative to the hinged arm, the damper automatically resets to push the push block to move towards the front end direction of the hinged arm. The process of closing the door is slowly gone on in this scheme realization, and does not receive the attenuator influence when opening the door, conveniently opens going on of door.

Furthermore, one side of the sliding part corresponding to the crankshaft swinging part is provided with a critical contact part, and when the crankshaft swinging part is abutted against the critical contact part, the compression amount of the elastic part is the maximum; when the contact part of the crankshaft swinging part and the sliding part is positioned at one side of the critical contact part, the elastic part is kept in a compressed state, the crankshaft swinging part and the sliding part are kept relatively static, and the hinge cup is in an open state; when the contact part of the crankshaft swinging part and the sliding part is positioned on the other side of the critical contact part and the contact part of the crankshaft swinging part and the sliding part is far away from the critical contact part, the elastic part automatically resets, the crankshaft swinging part and the sliding part relatively slide, and the hinge cup rotates and closes relative to the hinge arm. The scheme can realize that the hinge cup is in an open state and cannot be automatically closed.

Furthermore, the crankshaft swinging part is provided with a roller which is abutted against the sliding part, and when the hinged cup rotates relative to the hinged arm, the roller can roll on the sliding part, so that the noise generated by friction is effectively reduced.

Furthermore, in order to facilitate the installation of the roller, the crankshaft swinging portion comprises support plates arranged on the left side and the right side of the rear end of the crankshaft, fifth shaft holes are formed in the two support plates respectively, the fifth shaft holes of the two support plates are penetrated by two ends of a roller rotating shaft, and the roller is positioned between the two support plates and sleeved outside the roller rotating shaft.

Further, the first shaft hole, the second shaft hole, the third shaft hole and the fourth shaft hole are respectively provided with a shaft sleeve, each shaft sleeve comprises an inner ring and an outer ring arranged at the end part of the inner ring, the diameter of each outer ring is larger than that of the corresponding inner ring, the inner rings are sleeved in the shaft holes, and the outer rings are located outside the shaft holes. This scheme avoids rocker and bent axle and hinge cup, hinge arm and articulated shaft direct contact through the axle sleeve, can reduce frictional resistance, increases wear resistance, promotes the whole life-span of hinge, the production of noise abatement simultaneously also.

Furthermore, a limiting structure is arranged between the inner ring of the shaft sleeve positioned in the first shaft hole, the second shaft hole and the third shaft hole and the inner wall of the corresponding shaft hole, a positioning block extends from the outer side of the outer ring of the shaft sleeve positioned in the fourth shaft hole along the direction of the swinging part of the crankshaft, a shaft groove is formed in the position, corresponding to the fifth shaft hole, of the inner side of the positioning block, and the end part of the roller rotating shaft is sleeved in the shaft groove of the corresponding side positioning block. Therefore, the shaft sleeve can only slide relative to the hinge shaft but not relative to the shaft hole, and the service life of the shaft sleeve can be prolonged.

Furthermore, foretell elastic component is coil spring, and the position that the front end of fixing base corresponds the coil spring rear end is equipped with the spring hole, and the position that the rear side of slider corresponds the coil spring front end is equipped with the spring post, and coil spring's front end overlaps in the spring post outside of slider, and coil spring's rear end inserts in the spring hole of fixing base, makes things convenient for the assembly of coil spring and fixing base and slider like this, and the stability of coil spring installation is better.

The hinge provides closing force for the hinged cup through the elastic energy storage assembly, and the damper and the elastic energy storage assembly are assembled together, so that the assembly difficulty of the hinge is reduced, and the assembly efficiency is improved; the rocker and the crankshaft are isolated from the hinge cup, the hinge arm and the hinge shaft through the shaft sleeves, the crankshaft swinging part is in contact with the sliding part through the roller, the friction resistance can be reduced, the wear resistance is improved, the whole service life of the hinge is prolonged, the noise is reduced, and the silencing effect is improved.

Drawings

Fig. 1 is a schematic structural view of a heavy duty buffering hinge according to an embodiment of the present invention.

Fig. 2 is an exploded view of a heavy duty buffering hinge according to an embodiment of the present invention.

Fig. 3 is a partial sectional view of an opened state of a heavy duty buffering hinge according to an embodiment of the present invention.

Fig. 4 is a partial sectional view of a heavy duty check hinge according to an embodiment of the present invention in a closed state.

FIG. 5 is a schematic view illustrating an assembled state of the crankshaft, the sleeve and the roller according to the embodiment of the present invention.

Fig. 6 is an exploded view of fig. 5.

Fig. 7 is a schematic structural diagram of the bushing located at the first, second, and third axial holes according to the embodiment of the present invention.

FIG. 8 is a schematic view of the state of the rocker and the shaft sleeve assembled according to the embodiment of the present invention.

Fig. 9 is an exploded view of fig. 8.

Fig. 10 is a schematic structural diagram of the bushing at the position of the fourth shaft hole according to the embodiment of the present invention.

Fig. 11 is a schematic view illustrating an assembled state of the elastic energy storage element and the damper according to the embodiment of the invention.

Fig. 12 is an exploded view of fig. 11.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not to be construed as limiting the patent.

In order to explain the embodiment more simply, some parts which are known to those skilled in the art in the drawings or description but are not relevant to the main content of the present invention will be omitted. In addition, for convenience of description, some components in the drawings may be omitted, enlarged or reduced, but do not represent the size or the entire structure of an actual product, and in the embodiments, for example, the description related to the front, rear, left, right, upper, lower, clockwise, counterclockwise and the like, are relative orientations based on the laying state of the drawings and do not represent the relative orientations of the actual products.

Examples

As shown in fig. 1 to 12, the present embodiment provides a heavy buffer hinge, which includes a hinge cup 1, a rocker 2, a hinge arm 3, a base 4, a damper 5, a crankshaft 6 and an elastic energy storage assembly 7, wherein the cross section of the hinge arm 3 is similar to a door shape, the hinge arm 3 is mounted on the base 4, the front end of the rocker 2 is provided with a first shaft hole 81, the rear end of the rocker 2 is provided with a second shaft hole 82, the front end of the crankshaft 6 is provided with a third shaft hole 83, the rear end of the crankshaft 6 is provided with a fourth shaft hole 84, the front end of the rocker 2 is hinged to the hinge cup 1 by passing through the first shaft hole 81 and the shaft hole 10 of the hinge cup 1 via a first hinge shaft 91, the rear end of the rocker 2 is hinged to the upper portion of the front end of the hinge arm 3 by passing through the second shaft hole 92, the front end of the crankshaft 6 is hinged to the hinge cup 1 by passing through the third shaft hole 83 and the shaft hole 11 of the hinge cup 1 via a fourth hinge shaft 94, and the rocking lever 2 is located on the upper side of the crankshaft 6.

The elastic energy storage assembly 7 comprises a fixed seat 71, an elastic piece 72 and a sliding piece 73, wherein the fixed seat 71 is located in the hinged arm 3, the left side wall and the right side wall of the fixed seat 71 are abutted against the side walls of the hinged arm 3, the rear end of the fixed seat 71 penetrates through two connecting holes 710 at the rear end of the fixed seat through two connecting pins 96 to be connected with the side walls of the hinged arm 3, so that the fixed seat 71 is stably fixed in the hinged arm 3, the rear end of the elastic piece 72 is connected with the fixed seat 71, the front end of the elastic piece 72 is connected with the sliding piece 73, the sliding piece 73 is located on the front side of the fixed seat 71, the rear end of the crankshaft 6 is further provided with a crankshaft swinging part 61, and when the hinged cup 1 rotates relative to the hinged arm 3. The rear end of the damper 5 is fixed on the fixing seat 71, the damper 5 is located above the sliding member 73, the rear end of the rocker 2 is further provided with a rocker swinging part 21, and when the hinge cup 1 rotates and closes relative to the hinge arm 3, the rocker swinging part 21 of the rocker 2 can compress the damper 5.

When the hinge is used, as shown in fig. 3 and 4, when the hinge cup 1 rotates and opens relative to the hinge arm 2, the crankshaft 6 and the rocker 2 rotate clockwise around a circle, wherein the crankshaft 1 rotates to drive the crankshaft swinging part 61 at the rear end to swing clockwise around the fourth hinge shaft 94, and during the clockwise swinging process of the crankshaft swinging part 61, the crankshaft swinging part slides downwards along the front side surface of the sliding part 73 and pushes the sliding part 73 to move towards the rear end of the hinge arm 1, so that the compression of the elastic part 72 is realized, and the energy storage is realized after the elastic part 72 is compressed. At this moment, when needing to close the door, elastic component 72 resets automatically after being compressed, thereby promote slider 73 to move to the hinge arm 1 front end direction, slider 73 promotes bent axle swing portion 61 around fourth articulated shaft 94 anticlockwise swing simultaneously, thereby drive bent axle 6 and rocker 2 and make the relative hinge arm 2 of hinge cup 1 rotate the closure around the circle anticlockwise, realize the automatic effect of closing the door, and rocker 2 also can drive its rear end when making the anticlockwise around the circle the rocker swing portion 21 compress damper 5, because the damping effect of damper 5, make hinge cup 1 slowly rotate along the closure direction, the realization process of closing the door is gone on slowly, avoid cabinet door and cabinet body to collide vigorously.

As a relatively preferable solution of this embodiment, as shown in fig. 11 and 12, the elastic member 72 is a coil spring, a spring hole 711 is formed in a front end surface of the fixed seat 71 corresponding to a rear end of the coil spring, a spring post 731 is formed in a rear side of the sliding member 73 corresponding to a front end of the coil spring, the front end of the coil spring is sleeved outside the spring post 731 of the sliding member 73, and the rear end of the coil spring is inserted into the spring hole 711 of the fixed seat 71, so that the assembly of the coil spring with the fixed seat 71 and the sliding member 73 is facilitated, and the stability of the installation of the coil spring is better. And the front end face of the fixed seat 71 is also provided with a damper fixing hole 712 at the rear end position of the damper 5, and the rear end of the damper 5 is inserted into the damper fixing hole 712, so that the damper 5 is conveniently and stably mounted. The front end of the damper 5 is provided with a push block 51, when the hinged cup 1 rotates and closes relative to the hinged arm 3, the rocker swing part 21 slides relative to the push block 51 and pushes the push block 51 to move towards the rear end direction of the hinged arm 3 to compress the damper 5, and when the hinged cup 1 rotates and opens relative to the hinged arm 3, the damper 5 automatically resets and pushes the push block 51 to move towards the front end direction of the hinged arm 3, so that the door closing process is slowly performed, the door opening process is not influenced by the damper, and the door opening is convenient.

As shown in fig. 12, the damper 5 of the present embodiment includes a cylinder 52 and a piston rod 53, the piston rod 53 being capable of extending and contracting relative to the cylinder 52, the rear end of the cylinder 52 being inserted into a damper fixing hole 712; the push block 51 comprises a connecting block 512 and a sliding block 511, the sliding block 511 is made of wear-resistant plastic, the connecting block 512 is detachably connected with the sliding block 511, the connecting block 512 is connected with the front end of the piston rod 53, the sliding block 511 is located at the front end of the connecting block 512, an arc surface 513 is arranged on the front end surface of the sliding block 511, when the hinge cup 1 rotates relative to the hinge arm 3, the rocker swinging part 21 slides on the arc surface 513, so that the friction noise generated when the rocker swinging part 21 slides relative to the sliding block 511 can be reduced, and the hinge cup 1 rotates and is closed relative to the hinge arm 3 more uniformly and stably.

In this embodiment, the front side surface of the slider 73 has a critical contact portion, and when the crankshaft swinging portion 61 abuts against the critical contact portion, the compression amount of the coil spring is the largest (i.e., the length of the coil spring becomes the shortest after being compressed); when the contact part of the crankshaft swinging part 61 and the sliding part 73 is positioned at the lower side of the critical contact part, the elastic part 72 keeps a compressed state, the crankshaft swinging part 61 and the sliding part 73 keep relatively static, the hinge cup 1 is in an open state, and under the action of no external force, the hinge cup 1 cannot automatically rotate and close relative to the hinge arm 3, so that the door body is kept in the open state; when the contact part of the crankshaft swinging part 61 and the sliding part 73 is located at the upper side of the critical contact part, and the contact part of the crankshaft swinging part 61 and the sliding part 73 is upwards away from the critical contact part, the spiral spring automatically and gradually resets (namely the spiral spring gradually extends), the crankshaft swinging part 61 slides upwards relative to the sliding part 73, the hinge cup 1 automatically rotates and closes relative to the hinge arm 3, and automatic door closing is realized.

In order to reduce the friction between the crankshaft swing part 61 and the sliding part 73 and reduce the noise, the crankshaft swing part 61 is provided with the roller 62, the roller 62 is contacted with the sliding part 73 to form the contact part, when the hinge cup 1 rotates relative to the hinge arm 3, the roller 62 rolls on the front side surface of the sliding part 73, so that the abrasion speed of the crankshaft swing part 61 and the sliding part 73 can be reduced, the service life of the hinge is prolonged, and the silencing effect is better. As shown in fig. 5 and 6, the crankshaft swing portion 61 of the present embodiment includes the supporting plates 60 disposed at the left and right sides of the rear end of the crankshaft 6, the two supporting plates 60 are respectively provided with fifth shaft holes 85, two ends of a roller rotating shaft 95 penetrate through the fifth shaft holes 85 of the two supporting plates 60, and the roller 62 is located between the two supporting plates 60 and sleeved outside the roller rotating shaft 95, so as to facilitate the installation of the roller 62.

Also, as shown in fig. 5-10, as a modified solution of this embodiment, the first shaft hole 81, the second shaft hole 82, the third shaft hole 83, and the fourth shaft hole 84 are respectively provided with a shaft sleeve 90, the shaft sleeve 90 is made of a wear-resistant plastic material, the shaft sleeve 90 includes an inner ring 901 and an outer ring 902 disposed at an end of the inner ring 901, wherein the diameter of the outer ring 902 is larger than that of the inner ring 901, the inner ring 901 is sleeved in the shaft hole, the outer ring 902 is positioned outside the shaft hole, the shaft hole and the hinge shaft are isolated by the inner ring 901, the rocker 2 and the crankshaft 6 are isolated by the outer ring 902, the hinge cup 1 and the hinge arm 3, because the rocker 2, the crankshaft 6, the hinge cup 1 and the hinge arm 3 are generally made of metal materials, the metal parts of the hinge can be prevented from being in direct contact with each other to easily cause accelerated abrasion, the service life of the hinge is prolonged, meanwhile, the metal parts are prevented from being directly contacted and rubbed to generate larger noise, and the silencing effect is favorably improved. In addition, a limiting structure is arranged between the inner ring 901 of the shaft sleeve 90 positioned in the first shaft hole 81, the second shaft hole 82 and the third shaft hole 83 and the inner wall of the corresponding shaft hole, the limiting structure of the embodiment is a convex rib 904 arranged on the outer side surface of the inner ring 901 and a groove 80 arranged on the inner wall of the first shaft hole 81, the second shaft hole 82 and the third shaft hole 83, and the inner ring 901 is matched with the groove 80 of the corresponding shaft hole through the convex rib 904, so that the shaft sleeve 90 cannot slide relative to the shaft hole, the abrasion speed of the shaft sleeve 90 is reduced, and the service life of the shaft sleeve 90 can be prolonged; and the outer side of the outer ring 902 of the shaft sleeve 90 positioned in the fourth shaft hole 84 extends along the direction of the crankshaft swinging part 61 to form a positioning block 903, a shaft groove 9031 is formed in the position, corresponding to the fifth shaft hole 85, of the inner side of the positioning block 903, and the end part of the roller rotating shaft 95 is sleeved into the shaft groove 9031 of the corresponding side positioning block 903, so that the shaft sleeve 90 can not slide relative to the shaft hole, the roller rotating shaft 95 can be limited, and the stability of the structure is improved.

The hinge has the advantages that the silencing effect is good when the hinge is used, the moving space of each part along the axial direction of the hinge shaft is limited, the bearing is stable, and the service life is long.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

1. A heavy buffer hinge comprises a hinge cup (1), a rocker (2), a hinge arm (3), a base (4) and a crankshaft (6), wherein the hinge arm (3) is installed on the base (4), a first shaft hole (81) is arranged at the front end of the rocker (2), a second shaft hole (82) is arranged at the rear end of the rocker (2), a third shaft hole (83) is arranged at the front end of the crankshaft (6), a fourth shaft hole (84) is arranged at the rear end of the crankshaft (6), the front end of the rocker (2) penetrates through the first shaft hole (81) through a first hinge shaft (91) to be hinged with the hinge cup (1), the rear end of the rocker (2) penetrates through the second shaft hole (82) through a second hinge shaft (92) to be hinged with the hinge arm (3), the front end of the crankshaft (6) penetrates through the third shaft hole (83) through a third hinge shaft (93) to be hinged with the hinge cup (1), and the rear end of the crankshaft (6) penetrates through the fourth shaft hole (94) to be hinged with the, the method is characterized in that: the hinge arm (3) still be equipped with elasticity energy storage component (7), elasticity energy storage component (7) are including fixing base (71), elastic component (72) and slider (73), fixing base (71) are connected with hinge arm (3), elastic component (72) are located between fixing base (71) and slider (73), and slider (73) are located one side that fixing base (71) correspond bent axle (6), the rear end of bent axle (6) still is equipped with bent axle swing portion (61), and when hinge cup (1) rotated open relatively hinge arm (3), bent axle swing portion (61) of bent axle (6) can push slider (73) and move to hinge arm (3) rear end direction, slider (73) compress elastic component (72) simultaneously.

2. The heavy duty buffering hinge according to claim 1, wherein the hinge arm (3) is further provided with a damper (5), and the rear end of the rocker (2) is further provided with a rocker swinging part (21), and when the hinge cup (1) is rotatably closed relative to the hinge arm (3), the rocker swinging part (21) of the rocker (2) can compress the damper (5).

3. The heavy buffer hinge according to claim 2, wherein the rear end of the damper (5) is fixed on the fixed seat (71), the front end of the damper (5) is provided with a push block (51), when the hinge cup (1) rotates and closes relative to the hinge arm (3), the rocker swing part (21) slides relative to the push block (51) and pushes the push block (51) to move towards the rear end of the hinge arm (3) to compress the damper (5), and when the hinge cup (1) rotates and opens relative to the hinge arm (3), the damper (5) automatically resets to push the push block (51) to move towards the front end of the hinge arm (3).

4. The heavy duty buffering hinge according to claim 1, wherein a side of the sliding member (73) corresponding to the crankshaft swinging portion (61) has a critical contact portion, and when the crankshaft swinging portion (61) collides with the critical contact portion, the compression amount of the elastic member (72) is maximized; when the interference part of the crankshaft swinging part (61) and the sliding part (73) is positioned at one side of the critical contact part, the elastic part (72) keeps a compressed state, the crankshaft swinging part (61) and the sliding part (73) keep relatively static, and the hinge cup (1) is in an open state; when the contact part of the crankshaft swinging part (61) and the sliding part (73) is positioned at the other side of the critical contact part, and the contact part of the crankshaft swinging part (61) and the sliding part (73) is far away from the critical contact part, the elastic part (72) automatically resets, the crankshaft swinging part (61) and the sliding part (73) relatively slide, and the hinge cup (1) rotates and closes relative to the hinge arm (3).

5. The heavy duty damping hinge according to claim 1, wherein the crank swing portion (61) has a roller (62), the roller (62) is abutted against the sliding member (73), and the roller (62) can roll on the sliding member (73) when the hinge cup (1) rotates relative to the hinge arm (3).

6. The heavy buffer hinge according to claim 5, wherein the crankshaft swing part (61) comprises support plates (60) disposed at the left and right sides of the rear end of the crankshaft (6), the two support plates (60) are respectively provided with a fifth shaft hole (85), the two ends of a roller rotating shaft (95) penetrate through the fifth shaft holes (85) of the two support plates (60), and the roller (62) is disposed between the two support plates (60) and sleeved outside the roller rotating shaft (95).

7. The heavy buffer hinge according to claim 6, wherein the first shaft hole (81), the second shaft hole (82), the third shaft hole (83) and the fourth shaft hole (84) are respectively provided with a shaft sleeve (90), the shaft sleeve (90) comprises an inner ring (901) and an outer ring (902) arranged at the end of the inner ring (901), wherein the diameter of the outer ring (902) is larger than that of the inner ring (901), the inner ring (901) is sleeved in the shaft hole, and the outer ring (902) is positioned outside the shaft hole.

8. The heavy buffer hinge according to claim 7, wherein a limit structure is provided between an inner ring (901) of the shaft sleeve (90) located in the first shaft hole (81), the second shaft hole (82) and the third shaft hole (83) and an inner wall of the corresponding shaft hole, a positioning block (903) extends from an outer side of an outer ring (902) of the shaft sleeve (90) located in the fourth shaft hole (84) along a direction of the crankshaft swing portion (61), a shaft groove (9031) is provided at a position corresponding to the fifth shaft hole (85) on an inner side of the positioning block (903), and an end of the roller rotating shaft (95) is sleeved into the shaft groove (9031) of the positioning block (903) on the corresponding side.

9. The heavy duty buffering hinge according to claim 1, wherein the elastic member (72) is a coil spring, a spring hole (711) is formed in a position corresponding to a rear end of the coil spring at a front end of the fixing seat (71), a spring post (731) is formed in a position corresponding to a front end of the coil spring at a rear side of the sliding member (73), the front end of the coil spring is sleeved outside the spring post (731) of the sliding member (73), and the rear end of the coil spring is inserted into the spring hole (711) of the fixing seat (71).

10. The heavy buffer hinge according to claim 1, wherein the first shaft hole (81), the second shaft hole (82), the third shaft hole (83) and the fourth shaft hole (84) are respectively provided with a shaft sleeve (90), the shaft sleeve (90) comprises an inner ring (901) and an outer ring (902) arranged at the end of the inner ring (901), wherein the diameter of the outer ring (902) is larger than that of the inner ring (901), the inner ring (901) is sleeved in the shaft hole, and the outer ring (902) is positioned outside the shaft hole.

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