Automatic-return adjustable buffering door body hinge

Abstract

The invention relates to the technical field of door body hinges, in particular to an automatic-return adjustable buffer door body hinge, which is characterized in that a rectangular hole is formed in the bottom surface of an adjusting cavity at one end of an inner cavity of a box body structure; a fixing block in sliding clamping connection with the rectangular hole is fixed to the top face of the adjusting plate, an adjusting column with the two ends supported on the two side walls of the adjusting cavity is sleeved with an adjusting screw hole in the top of the fixing block, and a hole structure is arranged at the position, corresponding to the adjusting column, of the side wall of the box structure. A swing arm is arranged in the middle of a rotating shaft piece rotationally installed on the box body structure. A column cavity is formed in the middle of a swing base rotationally installed in the center of the bottom face of an inner cavity of the box structure, and column grooves are formed in the front side and the rear side of the outer end of the column cavity. The inner end of a connecting rod piece sleeved in the column cavity in a sliding manner is hinged with the swing arm; two ends of a return spring sleeved outside the connecting rod piece are respectively fixed in the column cavity and the inner end of the connecting rod piece; the outer end of the buffering mechanism piece sleeved with the column groove is connected to a supporting plate arranged at the outer end of the connecting rod piece in a sleeving mode. The overall structure of the door body hinge is simplified, the manufacturing cost is reduced, and installation and adjustment are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of door hinges, in particular to an automatic return adjustable buffer door hinge. Background Art

[0002] A hinge is a mechanical device used to connect two solid objects and allow them to rotate relative to each other. A hinge can be made of movable components or foldable materials. Hinges are mainly installed on cabinet doors and are mainly divided into stainless steel hinges and iron hinges according to the material.

[0003] For ease of application, the door hinges currently widely installed are generally provided with an automatic return structure. Such hinges are generally complex in structure and large in size and need to be placed inside the main body, which makes installation and adjustment difficult and the manufacturing cost of the hinge is high. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic return adjustable buffer door hinge, which is used to solve the problems of complex door hinge structure, high manufacturing cost and inconvenient installation and adjustment in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatically regressive adjustable buffer door hinge, wherein an adjustment cavity is provided at one end of the inner cavity of the box body structure, and a rectangular hole is provided at the rear portion of the bottom surface of the adjustment cavity; the adjustment plate is provided at the lower side of the box body structure, and a fixing block is fixed on the top surface of the adjustment plate and is slidably engaged with the rectangular hole along the horizontal direction, and an adjusting screw hole is provided between the two side walls extending to the top of the inner cavity of the box body structure; the adjusting column is threadedly sleeved in the adjusting screw hole, and the two ends of the adjusting column are respectively supported on the two side walls of the adjusting cavity, and the side walls of the box body structure are provided with a hole structure at a position corresponding to the slot structure in the middle of the outer end surface of the adjusting column; the bottom end of the rotating shaft is rotatably installed on the bottom surface of the inner cavity of the box body structure and away from one end of the adjusting cavity, and the rotating shaft The top end vertically penetrates the top surface of the box body structure, and a swing arm extending radially is provided in the middle of the rotating shaft; the swing base is rotatably installed at the center of the bottom surface of the inner cavity of the box body structure, and a column cavity is provided in the middle of the swing base, and column grooves are respectively provided at positions of the swing base close to one end of the adjusting cavity and located at the front and rear sides of the column cavity; the connecting rod is slidably mounted in the column cavity, and the inner end of the connecting rod is hinged to the outer end of the swing arm; the return spring is mounted on the outside of the connecting rod, and the two ends of the return spring are respectively fixed in the column cavity and one end of the connecting rod close to the swing arm; the middle part of the support plate is mounted on the outer end part of the connecting rod; the buffer mechanism component is mounted in the column groove, and the outer end of the buffer mechanism component is connected to the inner side wall of the support plate.

[0006] Preferably, the box body structure includes a lower shell and an upper shell that are interlocked with each other, a partition is provided at one end of the inner cavity of the lower shell, the outer side of the partition is the adjustment cavity, the upper shell and the lower shell side walls are respectively provided with arc groove four and arc groove one corresponding to the position in the middle of the outer end surface of the adjustment column, a rotating shaft that is rotatably sleeved and matched with the center of the bottom surface of the swing base is provided in the middle of the bottom surface of the inner cavity of the lower shell, a circular groove that is rotatably sleeved and matched with the bottom end of the rotating shaft member is provided at one end of the bottom surface of the inner cavity of the lower shell away from the partition, and the upper shell is provided with a through hole corresponding to the position of the circular groove.

[0007] Preferably, the rotating shaft comprises a shaft extending vertically and a bottom ring sleeved on the bottom end of the shaft and rotatably connected to the circular groove, the swing arm is sleeved on the middle part of the shaft, and the shaft is respectively sleeved with limit rings at the upper and lower sides of the swing arm.

[0008] Preferably, the connecting rod comprises an internal threaded tube, an ear seat fixed to the inner end of the internal threaded tube and hinged to the outer end of the swing arm, and an adjusting bolt slidably sleeved in the column cavity and the inner end of which is threadedly sleeved with the internal threaded tube. The middle part of the support plate is sleeved on the adjusting bolt near the outer end, the partition plate is provided with an arc groove three at a position corresponding to the outer end of the adjusting bolt, the side walls of the lower shell and the upper shell are respectively provided with arc groove two and arc groove five at positions corresponding to the arc groove three, and the inner end of the return spring is fixed to one end of the internal threaded tube close to the ear seat.

[0009] Preferably, an oblong hole extending laterally is provided on the front bottom surface of the adjusting cavity, a bottom hole is provided on the adjusting plate corresponding to the middle of the oblong hole, a top hole is provided on the upper shell body directly opposite to the oblong hole, a guide fixing column is provided on the inner thread of the bottom hole, and the guide fixing column is slidably engaged with the oblong hole laterally.

[0010] Preferably, limit blocks are fixed respectively at the front and rear parts of the inner side of the through hole on the top surface of the upper shell.

[0011] Preferably, the adjustment plate is provided with a bottom hole at a position corresponding to the circular groove, which is slidably engaged with the bottom end of the circular groove in a transverse direction.

[0012] Preferably, the adjusting bolt, the guide fixing column and the adjusting column are respectively hexagon socket bolts.

[0013] Preferably, a plurality of countersunk holes are provided on the top surface of the adjustment plate near the outer edge.

[0014] Preferably, the inner circumferential wall of the column cavity and the outer circumferential wall of one end of the internally threaded tube close to the ear seat are respectively provided with protrusions that are clipped and matched with the end of the return spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The automatic return adjustable buffer door hinge of the present invention has a compact and simple overall structure, and integrates the door automatic return structure and the buffer door closing structure, which not only enriches the functions but also reduces the manufacturing cost.

[0016] 2. The automatic return adjustable buffer door hinge of the present invention is installed outside the door body, so it is easy to install and maintain.

[0017] 3. The automatic return adjustable buffer door hinge involved in the present invention can facilitate the left and right offset of the hinge main structure relative to the adjustment plate through the adjustment column, so as to facilitate the adjustment process during installation and use.

[0018] 4. The automatic return adjustable buffer door hinge involved in the present invention has strong versatility and can be conveniently applied to the installation of the door body opening to the left or right. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall decomposition structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the lower shell of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the upper shell of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the rotating shaft member of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the swing base of the present invention; Figure 7 It is a schematic diagram of the exploded structure of the connecting rod of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the adjustment plate of the present invention.

[0020] In the figure: 1-lower housing; 1.1-circular groove; 1.2-rotating shaft; 1.3-partition plate; 1.4-adjusting cavity; 1.5-rectangular hole; 1.6-long circular hole; 1.7-arc groove 1; 1.8-arc groove 2; 1.9-arc groove 3; 2-upper shell; 2.1-perforation; 2.2-arc groove four; 2.3-arc groove five; 2.4-limiting block; 2.5-top hole; 3-rotating shaft; 3.1-shaft rod; 3.2-swing arm; 3.3-bottom ring; 3.4-limiting ring; 4-swing base; 4.1-column cavity; 4.2-column groove; 5-connecting rod; 5.1-internal threaded pipe; 5.2-ear seat; 5.3-adjusting bolt; 6-Return spring; 7-adjustment plate; 7.1-bottom hole; 7.2-fixing block; 7.3-adjustment screw hole; 7.4-bottom hole; 8- support plate; 9-buffer mechanism components; 10-Guide fixing column; 11-adjusting column; 12-Box structure. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1-6 The present invention provides a technical solution, an automatic return adjustable buffer door hinge, an adjustment cavity 1.4 is provided at one end of the inner cavity of the box structure 12, and a rectangular hole 1.5 is provided at the rear of the bottom surface of the adjustment cavity 1.4. Among them, the box structure 12 includes a lower shell 1 and an upper shell 2 that are interlocked with each other, a partition 1.3 is provided at one end of the inner cavity of the lower shell 1, the outer side of the partition 1.3 is the adjustment cavity 1.4, and an oblong hole 1.6 extending laterally is provided at the front of the bottom of the adjustment cavity 1.4. A rotating shaft 1.2 is provided in the middle of the bottom surface of the inner cavity of the lower shell 1. A circular groove 1.1 is provided at one end of the bottom surface of the inner cavity of the lower shell 1 away from the partition 1.3. An arc groove 1.7 is provided at the position of the side wall of the lower shell 1 corresponding to the rectangular hole 1.5. An arc groove 2 1.8 is provided in the middle of the side wall of the lower shell 1 close to one end of the adjustment cavity 1.4, and an arc groove 3 1.9 is provided at the position of the partition 1.3 facing the arc groove 2 1.8. The side wall of the upper shell 1 2 is provided with an arc groove 4 2.2 and an arc groove 5 2.3 at positions corresponding to the arc groove 1 1.7 and the arc groove 2 1.8, respectively. That is, the arc groove 1 1.7 and the arc groove 4 2.2 are combined into a complete hole structure; and the arc groove 2 1.8 and the arc groove 5 2.3 are combined into a complete hole structure. The upper shell 2 is provided with a top hole 2.5 at a position corresponding to the oblong hole 1.6; and the upper shell 2 is provided with a through hole 2.1 at a position corresponding to the circular groove 1.1.

[0023] The rotating shaft 3 includes a shaft rod 3.1 extending vertically and having its top end passing through the through hole 2.1, and a bottom ring 3.3 sleeved on the bottom end of the shaft rod 3.1 and rotatably sleeved with the circular groove 1.1. The swing arm 3.2 is sleeved on the middle part of the shaft rod 3.1, and the shaft rod 3.1 is respectively sleeved with limit rings 3.4 at the upper and lower sides of the swing arm 3.2.

[0024] The bottom center of the swing base 4 is rotatably mounted on the rotating shaft 1.2. A column cavity 4.1 is provided in the middle of the swing base 4. Column grooves 4.2 are provided near one end of the adjustment cavity 1.4 and at the front and rear sides of the column cavity 4.1.

[0025] The connecting rod 5 is slidably mounted in the column cavity 4.1, and the inner end of the connecting rod 5 is hinged to the outer end of the swing arm 3.2; the two ends of the return spring 6 are respectively fixed in the column cavity 4.1 and the end of the connecting rod 5 close to the swing arm 3.2; the middle part of the support plate 8 is mounted on the outer end of the connecting rod 5; the buffer mechanism component 9 is mounted in the column groove 4.2, and the outer end of the buffer mechanism component 9 is connected to the inner side wall of the support plate 8. In the specific embodiment 1 of the present invention, the buffer mechanism component 9 can be composed of a buffer spring, a cylinder or an oil cylinder.

[0026] In summary, when in use, the top end of the shaft rod 3.1 is fixedly docked with the bottom end of the shaft member on one side of the door body, and a stopper is provided on the bottom surface of the door body corner to limit the door opening angle. The bottom of the box structure 12 is fixed to the corner of the door frame. When the door body is opened, the door body rotates until the stopper contacts the limit block 2.4 to achieve the maximum door opening angle. At this time, the shaft rod 3.1 rotates, and pulls the connecting rod 5 through the swing arm 3.2, the swing base 4 swings accordingly, the return spring 6 is in a stretched state, and the support plate 8 moves relative to the swing base 4 to reduce the original stretching amount of the buffer mechanism member 9.

[0027] When the door is released, the contraction of the return spring 6 causes the connecting rod 5 to pull the swing arm 3.2, and the swing base 4 swings back to its original position while the shaft 3.1 drives the door to close automatically. During this period, the connecting rod 5 moves relative to the swing base 4, that is, the outer end of the connecting rod 5 stretches the buffer mechanism 9 through the support plate 8. In this way, when the automatic door closing action is about to end, the buffer mechanism 9 prevents the connecting rod 5 from moving quickly toward the outer side, that is, it prevents the door from closing quickly, thereby achieving the effect of buffering the door closing and avoiding pinching the hand.

[0028] In addition, the top surface of the upper shell 2 is respectively fixed with limit blocks 2.4 at the front and rear parts of the inner side of the perforation 2.1. That is, a stopper is provided at the corner of the door body, and when the stopper rotates 90° with the door body, it just hits one of the limit blocks 2.4 to achieve the limit effect on the door opening angle. Since two limit blocks 2.4 are provided, the door opening angle in both directions of the door body can be limited. This ensures that the door hinge can adapt to the installation conditions of the door body opening to the left and opening to the right, and enhances the versatility of the hinge.

[0029] For example 2, please refer to Figure 1-5,7 Based on the first embodiment, the connecting rod 5 includes an internal threaded tube 5.1, an ear seat 5.2 fixed to the inner end of the internal threaded tube 5.1 and hinged to the outer end of the swing arm 3.2, and an adjusting bolt 5.3 slidably sleeved in the column cavity 4.1 and the inner end of which is threadedly sleeved with the internal threaded tube 5.1, and the middle part of the support plate 8 is sleeved near the outer end of the adjusting bolt 5.3. The inner end of the return spring 6 is fixed to one end of the internal threaded tube 5.1 near the ear seat 5.2. Among them, the inner circumferential wall of the column cavity 4.1 and the outer circumferential wall of one end of the internal threaded tube 5.1 near the ear seat 5.2 are respectively provided with convex points that are clamped and matched with the end of the return spring 6. That is, the two ends of the return spring 6 are respectively fixed to the column cavity 4.1 and the end of the connecting rod 5 near the swing arm 3.2 through the convex points. The adjusting bolt 5.3 is a hexagon socket bolt, and the outer end of the adjusting bolt 5.3 is aligned with the hole structure formed by the arc groove 3 1.9 and the arc groove 2 1.8 and the arc groove 5 2.3. There is an overfit between the hinge shaft at the ear seat 5.2 and the connecting hole at the outer end of the swing arm 3.2.

[0030] In summary, after the door is opened and closed for a certain number of times, the output elastic force of the return spring 6 will be attenuated, and compensation adjustment is required. That is, by using an inner hexagonal wrench to pass through the hole structure formed by the arc groove 2 1.8 and the arc groove 5 2.3 and the arc groove 3 1.9, the adjusting bolt 5.3 can be easily rotated to make it expand and contract relative to the internal threaded tube 5.1, so as to achieve the effect of adjusting the elastic force of the return spring 6 when opening and closing the door.

[0031] Example 3: Please refer to Figure 1-4 8. On the basis of the first embodiment, the adjustment plate 7 is arranged on the lower side of the box structure 12. The adjustment plate 7 is provided with a bottom hole 7.4 at a position corresponding to the middle of the oblong hole 1.6. The bottom hole 7.4 is internally threaded with a guide fixing column 10. The guide fixing column 10 is laterally slidably engaged with the oblong hole 1.6. A fixing block 7.2 is fixed on the top surface of the adjustment plate 7, which is laterally slidably engaged with the rectangular hole 1.5. The fixing block 7.2 extends to the top of the inner cavity of the box structure 12, and an adjustment screw hole 7.3 is provided between the two side walls; the adjustment column 11 is threadedly mounted in the adjustment screw hole 7.3. The two ends of the adjustment column 11 are respectively supported on the two side walls of the adjustment cavity 1.4. The adjustment plate 7 is provided with a bottom hole 7.1 at a position corresponding to the circular groove 1.1, which is laterally slidably engaged with the bottom end of the circular groove 1.1. The guide fixing column 10 and the adjustment column 11 are hexagon socket bolts respectively. A plurality of countersunk holes are provided on the top surface of the adjustment plate 7 near the outer edge.

[0032] In summary, the adjustment plate 7 is fixed to the corner of the door frame by screws and countersunk holes. When the door is installed or adjusted later, the adjustment column 11 can be screwed through the arc groove 1.7 and the arc groove 4 2.2 to form a complete hole structure, so that the box structure 12 can slide left or right relative to the adjustment plate 7. During this period, the guide fixing column 10 and the oblong hole 1.6 slide relative to each other, playing an auxiliary guiding role to ensure the smooth sliding of the box structure 12. After the left and right positions of the box structure 12 relative to the adjustment plate 7 are adjusted, the guide fixing column 10 is screwed through the top hole 2.5 with a hexagonal wrench, so that the bottom end is inserted into the hole reserved on the door frame until its top cap is pressed against the bottom surface of the adjustment cavity 1.4, that is, the fixed connection strength between the box structure 12 and the adjustment plate 7 is enhanced.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic return adjustable buffer door hinge, characterized in that: include: A box structure (12), wherein an adjustment cavity (1.4) is provided at one end of the inner cavity of the box structure (12), and a rectangular hole (1.5) is provided at the rear portion of the bottom surface of the adjustment cavity (1.4); an adjustment plate (7), the adjustment plate (7) being arranged on the lower side of the box structure (12), a fixing block (7.2) being fixed on the top surface of the adjustment plate (7) and being slidably engaged with the rectangular hole (1.5) in a transverse direction, and an adjustment screw hole (7.3) being arranged between two side walls of the top of the inner cavity of the box structure (12); An adjusting column (11), the adjusting column (11) being threadedly sleeved into the adjusting screw hole (7.3), the two ends of the adjusting column (11) being respectively supported on the two side walls of the adjusting cavity (1.4), and the side wall of the box body structure (12) being provided with a hole structure at a position corresponding to the slot structure in the middle of the outer end surface of the adjusting column (11); A rotating shaft member (3), the bottom end of the rotating shaft member (3) being rotatably mounted on the bottom surface of the inner cavity of the box body structure (12) and away from one end of the regulating cavity (1.4), the top end of the rotating shaft member (3) vertically penetrating the top surface of the box body structure (12), and a swing arm (3.2) extending radially is provided in the middle of the rotating shaft member (3); A swing base (4), the swing base (4) being rotatably mounted at the center of the bottom surface of the inner cavity of the box structure (12), a column cavity (4.1) being provided in the middle of the swing base (4), and column grooves (4.2) being provided at positions of the swing base (4) close to one end of the adjustment cavity (1.4) and located at the front and rear sides of the column cavity (4.1); A connecting rod (5), the connecting rod (5) being slidably mounted in the column cavity (4.1), and the inner end of the connecting rod (5) being hinged to the outer end of the swing arm (3.2); A return spring (6), the return spring (6) being sleeved on the outside of the connecting rod (5), and the two ends of the return spring (6) being respectively fixed in the column cavity (4.1) and at one end of the connecting rod (5) close to the swing arm (3.2); A support plate (8), wherein a middle portion of the support plate (8) is sleeved onto an outer end portion of the connecting rod (5); A buffer mechanism component (9), wherein the buffer mechanism component (9) is sleeved in the column slot (4.2), and an outer end of the buffer mechanism component (9) is connected to the inner side wall of the support plate (8).

2. The automatic return adjustable buffer door hinge according to claim 1, characterized in that: The box structure (12) comprises a lower shell (1) and an upper shell (2) which are interlocked with each other, a partition (1.3) being provided at one end of the inner cavity of the lower shell (1), the outer side of the partition (1.3) being the adjusting cavity (1.4), arc groove 4 (2.2) and arc groove 1 (1.7) being provided at positions corresponding to the middle of the outer end surface of the adjusting column (11) on the side walls of the upper shell (2) and the lower shell (1), respectively, a rotating shaft (1.2) being provided at the middle of the bottom surface of the inner cavity of the lower shell (1) and being rotatably sleeved with the center of the bottom surface of the swing base (4), a circular groove (1.1) being rotatably sleeved with the bottom end of the rotating shaft member (3) being provided at one end of the bottom surface of the inner cavity of the lower shell (1) away from the partition (1.3), and a through hole (2.1) being provided at a position corresponding to the circular groove (1.1) on the upper shell (2).

3. The automatic return adjustable buffer door hinge according to claim 2, characterized in that: The rotating shaft member (3) comprises a shaft (3.1) extending vertically and a bottom ring (3.3) sleeved on the bottom end of the shaft (3.1) and rotatably sleeved with the circular groove (1.1); the swing arm (3.2) sleeved on the middle part of the shaft (3.1); and the shaft (3.1) is sleeved with limit rings (3.4) at the upper and lower sides of the swing arm (3.2), respectively.

4. The automatic return adjustable buffer door hinge according to claim 2, characterized in that: The connecting rod (5) comprises an internal threaded tube (5.1), an ear seat (5.2) fixed to the inner end of the internal threaded tube (5.1) and hinged to the outer end of the swing arm (3.2), and an adjusting bolt (5.3) slidably sleeved in the column cavity (4.1) and the inner end of which is threadedly sleeved with the internal threaded tube (5.1). The middle part of the support plate (8) is sleeved near the outer end of the adjusting bolt (5.3). The partition plate (1.3) is provided with an arc groove three (1.9) at a position corresponding to the outer end of the adjusting bolt (5.3). The side walls of the lower shell (1) and the upper shell (2) are respectively provided with an arc groove two (1.8) and an arc groove five (2.3) at positions corresponding to the arc groove three (1.9). The inner end of the return spring (6) is fixed to one end of the internal threaded tube (5.1) near the ear seat (5.2).

5. The automatic return adjustable buffer door hinge according to claim 4, characterized in that: The front bottom of the adjustment cavity (1.4) is provided with an oblong hole (1.6) extending in the transverse direction, the adjustment plate (7) is provided with a bottom hole (7.4) at a position corresponding to the middle of the oblong hole (1.6), the upper shell (2) is provided with a top hole (2.5) at a position corresponding to the oblong hole (1.6), the bottom hole (7.4) is internally threaded with a guide fixing column (10), and the guide fixing column (10) is slidably engaged with the oblong hole (1.6) in the transverse direction.

6. The automatic return adjustable buffer door hinge according to claim 2, characterized in that: Limiting blocks (2.4) are respectively fixed on the top surface of the upper shell (2) at the front and rear portions of the inner side of the through hole (2.1).

7. The automatic return adjustable buffer door hinge according to claim 2, characterized in that: The adjustment plate (7) is provided with a bottom hole (7.1) at a position corresponding to the circular groove (1.1) and is slidably engaged with the bottom end of the circular groove (1.1) in a transverse direction.

8. The automatic return adjustable buffer door hinge according to claim 5, characterized in that: The adjusting bolt (5.3), the guide fixing column (10) and the adjusting column (11) are respectively hexagon socket bolts.

9. The automatic return adjustable buffer door hinge according to claim 1, characterized in that: The top surface of the adjustment plate (7) is provided with a plurality of countersunk holes near the outer edge.

10. The automatic return adjustable buffer door hinge according to claim 4, characterized in that: The inner peripheral wall of the column cavity (4.1) and the outer peripheral wall of one end of the internally threaded tube (5.1) close to the ear seat (5.2) are respectively provided with protrusions that are matched with the end of the return spring (6) by clamping.

Images