WO2015149495A1 - Adjustable door hinge having improved adjustment structure - Google Patents

Abstract

An adjustable door hinge, comprising a pair of base parts, a set of hinge members (2) allowing the pair of base parts to open and close, the base parts being provided with a pair of positioning members (4, 112), one of the bases (11, 12) being provided with a displacement adjustment means capable of adjusting the left/right and inner/outer displacement of the positioning members (4, 112); the displacement adjustment means comprises a gear rack (84), gear (83), and U-shaped member (6) on the positioning members (4, 112); the tail end of the U-shaped member (6) is provided with an adjustment screw hole (65), in which is provided a threaded post (5); the top end of the threaded post (5) is provided with a center hole (55) allowing an operating tool to drive it in rotation, and the threaded post (5) is rotatably positioned on the base; the top arm body of the U-shaped opening (63) of the U-shaped member (6) is provided with a through-hole (64); the displacement adjustment means further comprises a support arm (41) arranged on the positioning members; the support arm (41) is provided with a tight-set screw hole (42) corresponding to the through-hole (64); the support arm (41) is inserted into the U-shaped opening (63); a set screw passes through the through-hole (64) and is rotatably connected to the interior of the set screw hole (42); the present hinge may be applied to adjustable, concealable door hinge products.

Description

Adjustable door hinge with improved adjustment structure Technical field

The present invention relates to a heavy duty door hinge that can be used in a door or door frame, and more particularly to an adjustable door hinge with an improved adjustment structure that is capable of forming multiple angles of opening and closing.

Background technique

The applicant filed a Chinese patent with the application number ZL201320629066.8 on October 12, 2013, which discloses a three-dimensional adjustable door hinge comprising a pair of left receptacles that can be embedded in a door leaf or door frame, a right receiving seat, and a set of arcuate arm assemblies capable of forming a varying angle, wherein the left receiving seat and the right receiving seat are respectively provided with a pair of adjustable displacement fixing members, and two ends of the arcuate arm assembly are respectively connected to the a pair of the fixing members in the left receiving seat and the right receiving seat; one of the pair of the fixing members in the left receiving seat or the right receiving seat includes a sinking into the receiving seat a straight arm, the straight arm is provided with a straight tooth; a gear corresponding to the straight tooth is disposed on the receiving seat, the gear is located at a side of the straight tooth and meshes with the straight tooth When the gear is rotated, the fixing member can be driven to move. The pair of the fixing members in the right receiving seat further comprise an arm (42c, 42d) connected to the straight arm, and the arms (42c, 42d) are provided with internal and external adjusting devices; The inner and outer adjusting device comprises a set screw, a positioning screw disposed on a side of the set screw, and a threaded sleeve screwed to the set screw, the threaded sleeve being screwed to the right receiving seat, The set screw is threadedly connected to the threaded sleeve through the arm, and the set screw is screwed onto the arm and the set screw is pressed against the right receptacle. The door hinge disclosed in the patent document ZL201320629066.8 has an arm (42c, 42d) capable of adjusting the X direction, that is, the inside and outside direction, and also adjusting the Y direction, that is, the left and right direction. However, the adjustment of the two directions is concentrated on the same arm 42c or the arm 42d. The consequence of this is that the adjustment of the Y direction may require the entire arm 42c or the arm 42d to move left and right, which may affect the X. The determined position in the direction.

Summary of the invention

As an adjustable door hinge, as shown in FIG. 5, it is generally required to be adjustable in three directions of the X axis, the Y axis, and the Z axis. In view of the deficiencies of the prior art, one of the problems solved by the present invention is to improve the structure of the arm disclosed in the prior art and the structure of the associated positioning mechanism, so that we do not affect when adjusting the Y-axis direction. The positioning position that has been determined in the X-axis direction does not affect the positioning position in which the Y-axis has been determined when the X-axis direction is adjusted.

To this end, the present invention proposes an adjustable door hinge having an improved adjustment structure, having

A pair of base portions can be respectively disposed on the door frame and the door leaf, each of the base portions including a base and a receiving cavity disposed in the base, wherein each of the receiving chambers is provided with a front positioning a pair of positioning members composed of a piece and a rear positioning member, the front positioning member and the rear positioning member are arranged in front and rear with a spacing and fixedly connected by the connecting arm, and a pair of the positioning members are slidable in the receiving cavity;

a set of hinges between a pair of the base portions for forming a plurality of angles between the pair of base portions, and a pair of end shafts of the hinge members are respectively connected to the respective ones Between the front positioning member and the rear positioning member in the base portion;

The first displacement adjusting device capable of adjusting the left and right displacement and the inner and outer displacement of the front positioning member is disposed in one of the bases, and is further provided with a first portion capable of adjusting left and right displacement and internal and external displacement of the rear positioning member. Two displacement adjusting device; wherein

The first displacement adjusting device includes a first rack disposed on the front positioning member, a first gear that is disposed on a side of the first rack and engages with the first rack, and rotates The first gear can drive the front positioning member to move left and right;

The first displacement adjusting device further includes a first U-shaped member, the tail end of the first U-shaped member is provided with a first adjusting threaded hole, and the first adjusting threaded hole is provided with a first stud, the first a top end of the stud is provided with a central hole capable of driving the operating tool to rotate, the first stud being rotatably positioned on the base; the first U-shaped member having a U-shaped opening, the U-shaped a first through hole is formed in the front arm body of the opening portion, and the first through hole has a long groove shape extending in the left-right direction;

The first displacement adjusting device further includes a first arm disposed on the front positioning member, the first arm is biased on one side of the front positioning member, and the first arm is disposed on the first arm a first tightening threaded hole corresponding to the first through hole, the first arm is inserted into the U-shaped opening of the first U-shaped member, and the first set screw passes through the first through hole a hole is screwed into the first tightening threaded hole;

The second displacement adjusting device includes a second rack disposed on the rear positioning member, a second gear that is disposed on a side of the second rack and engages with the second rack, and rotates The second gear can drive the rear positioning member to move left and right;

The second displacement adjusting device further includes a second U-shaped member, the tail end of the second U-shaped member is provided with a second adjusting threaded hole, and the second adjusting threaded hole is provided with a second stud, a top end of the second stud is provided with a central hole capable of driving the operating tool to rotate, the second stud is rotatably positioned on the base; the second U-shaped member has a U-shaped opening, a second through hole is formed in the front arm body of the U-shaped opening portion, and the second through hole has a long groove shape extending in the left-right direction;

The second displacement adjusting device further includes a second arm disposed on the rear positioning member, the second arm is biased on one side of the rear positioning member, and the second arm is disposed on the second arm a second tightening screw hole corresponding to the second through hole, the second arm is inserted into the U-shaped opening of the second U-shaped member, and the second set screw passes through the second pass The hole is screwed into the second set screw hole.

In the above-described structure, the structure of the first displacement adjusting device and the second displacement adjusting device are substantially identical. Moreover, when the front positioning member is adjusted in the X-axis or the Y-axis, the adjustment of the correspondence of the rear positioning member is generally required. Next, the directions of the left and right displacement and the inner and outer displacements defined by the present invention can be referred to the Y direction and the X direction shown in FIG. 5 in the embodiment; the Z-axis direction shown in FIG. 4 is the up and down direction.

Since the end shafts of the two ends of the set of hinges are respectively connected between the front positioning member and the rear positioning member, the adjustable position of the front positioning member and the rear positioning member can be adjusted. The relative position between the bases of the door hinges, that is, the relative position between the door leaf and the door frame, for example, their spacing, relative parallelism or degree of fit, and the like.

In the following, taking the structure of the first displacement adjusting device as an example, the technical solution of the present invention has a beneficial technical effect compared with the prior art, in that the first displacement adjusting device includes a first U-shaped member, and the Inserting a first arm into the U-shaped opening of the first U-shaped member, and tightening or releasing between the two through the first through hole through the first set screw, for which adjustment is needed Before the left and right displacement of the front positioning member in the Y direction, the first set screw can be released, and the first U-shaped member and the first arm are in a relaxed state; When the first gear drives the front positioning member to move left and right, the front positioning member moves left and right along with the first arm, and the first arm is only a U shape defined by the first U-shaped member Moving left and right in the space, but at this time, the first U-shaped member is still defined by the first stud, that is, it does not move left and right and does not move inside and outside, for which the front gear is driven by the first gear When the positioning member moves left and right, it does not affect the inside and outside of the front positioning member that has been determined. The impact (ie, X direction) position. Conversely, when the first stud is rotated, the front positioning member can be moved in the inner and outer directions (ie, the X direction), thereby realizing the adjustment of the X direction, and the front positioning member is not affected during the adjustment process. The position in the Y direction. To this end, the solution of the invention makes it possible to avoid the influence of the adjustment of one direction on the position already determined for the other direction.

In a further technical solution, the tail end of the first stud has a non-threaded cylinder, and the non-threaded cylinder is provided with a ring-shaped protruding edge, and the tail end of the first stud is further disposed. a first central screw hole; a first cavity is disposed on the base, a first cavity hole is disposed on a bottom wall of the first cavity, and an aperture of the first cavity is smaller than the first cavity An inner diameter of the bottom wall of the cavity; further comprising a first connecting screw, the screw portion of the first connecting screw being screwed in the first central screw hole, the head of the first connecting screw and the first recess There is a gap between the bottom walls of the cavity. The gap enables the first stud to be rotationally positioned on the base.

A further technical solution may further include: a first spacer disposed between the head of the first connecting screw and the bottom wall of the first cavity, the first spacer and the first connecting screw There is a gap between the head or the bottom wall of the first cavity. The first spacer enables not only rotational positioning of the first stud and the base but also a minimum amount of clearance.

In a further technical solution, the tail end of the second stud has a non-threaded cylinder, and the non-threaded cylinder is provided with a raised edge, and the tail end of the second stud is further disposed. a second central screw hole; a second cavity is disposed on the base, a second cavity hole is disposed on a bottom wall of the second cavity, and an aperture of the second cavity is smaller than the second hole An inner diameter of the bottom wall of the cavity; further comprising a second connecting screw, the screw portion of the second connecting screw being screwed in the second central screw hole, the head of the second connecting screw and the second recess There is a gap between the bottom walls of the cavity.

A further technical solution may further be that a second spacer is further disposed between the head of the second connecting screw and the bottom wall of the second cavity, and the second spacer and the second connecting screw There is a gap between the head or the bottom wall of the second cavity.

A further technical solution may further include a cover plate capable of covering the receiving cavity, the cover plate being provided with a through hole adapted to an upper axial end of the first gear.

In a further technical solution, the upper shaft end of the first gear extends into the through hole; and the base is provided with an axis adapted to the lower shaft end of the first gear. a hole, the lower shaft end of the first gear is rotatably disposed in the shaft hole.

In a further technical solution, the cover plate may further be provided with a scale line corresponding to a pair of marking lines disposed on the positioning member.

Since the present invention has the above features and advantages, it can be applied to an adjustable concealed door hinge product.

DRAWINGS

1 is a schematic perspective view of an adjustable door hinge of an improved adjustment structure to which the technical solution of the present invention is applied;

Figure 2 is a schematic structural view of the front view of the adjustable door hinge of the improved adjustment structure shown in Figure 1;

Figure 3 is a cross-sectional view taken along line B-B of Figure 2;

Figure 4 is a cross-sectional view taken along line A-A of Figure 2; wherein the mechanism for adjusting the adjustment structure and the adjusting member shown in Figure 3 in combination with a pair of positioning members (4, 4a) are the same. And in order to clearly show the structure of these adjustment members themselves, FIG. 3 specifically removes the adjustment members associated with the front positioning members 4 from the base 12. The combined structure of these removal members can be referred to the associated combination structure of the rear positioning member 4a. Correspondingly, the specific structure of the relevant adjustment mechanism of the rear positioning member 4a can also refer to the adjustment portion related to the front positioning member 4. Pieces.

Figure 5 is a perspective view showing the adjustment mechanism shown in Figure 1 separately after being removed from the base (11, 12);

Figure 6 is a perspective view showing the other direction of Figure 5;

Fig. 7 is a perspective view showing the structure of a part of Fig. 5 removed.

detailed description

The adjustable door hinge with the improved adjustment structure to which the technical solution of the present invention is applied will be further described below with reference to the accompanying drawings.

As an adjustable door hinge, as shown in FIG. 4, it is generally required to be adjustable in three directions of the X axis, the Y axis, and the Z axis. The invention and the embodiment mainly disclose how to realize the improved structure of adjusting the door hinge 1 in the X-axis and Y-axis directions, so that when the Y-axis direction is adjusted, the positioning position of the X-axis has not been affected, The adjustment of the X-axis direction also does not affect the positioning position in which the Y-axis has been determined.

As shown in FIG. 1, FIG. 2 and FIG. 3, an adjustable door hinge 1 having an improved adjustment structure has a pair of base portions including a left base portion and a right base portion, which are respectively disposed through screws. Connection holes (111, 111a, 121, 121a) thereon can be provided to the door frame and the door leaf.

The left base portion includes a left base 11 and a receiving cavity 110 disposed in the left base 11. The receiving cavity 110 is provided with a pair of a front positioning member 112 and a rear positioning member 112a. a positioning member, the front positioning member 112 and the rear positioning member 112a are arranged in front and rear with a spacing and fixedly connected by a connecting arm 81, and a pair of the positioning members (112, 112a) are slidable up and down in the receiving cavity 110; The front positioning member 112 of the left base 11 is provided with a front adjusting device 113, and the rear positioning member 112a is provided with a rear adjusting device 114, which is mainly used for adjusting the vertical direction (ie, the Z direction). The door hinge 1 is not the focus of the present invention, and no further explanation is provided for this purpose.

As shown in FIG. 1 to FIG. 7, the right base portion includes a right base 12 and a receiving cavity 120 disposed in the right base 12, and the receiving cavity 120 is also provided with a front positioning member 4 and a pair of positioning members composed of a rear positioning member 4a, the front positioning member 4 and the rear positioning member 4a are arranged in a front-rear arrangement with a spacing and fixedly connected by a connecting arm 82, and a pair of the positioning members (4, 4a) are in the The accommodating chamber 120 can be slid left and right, inside and outside, thereby realizing the adjustment of the left and right, inner and outer sides of the door hinge 1.

A set of hinges 2 is disposed between the left base 11 and the right base 12, and the set of hinges 2 is used to form a plurality of angles between the pair of base portions. Wherein, a set of the hinge members 2 includes a first arcuate arm 21 and a second arcuate arm 22, and an intermediate portion of the first arcuate arm 21 and the second arcuate arm 22 is hinged through the intermediate shaft 23. The left end shaft 25 of the first bow arm 21 is slidably disposed between the front positioning member 112 and the rear positioning member 112a in the left base 11, and the right end shaft 26 is rotatably positioned on the right base. Between the front positioning member 4 and the rear positioning member 4a of 12; the left end shaft 24 of the second bow arm 22 is rotatably positioned in the front positioning member 112 and the rear positioning member 112a in the left base 11. Between, the right end shaft 27 is slidably disposed between the front positioning member 4 and the rear positioning member 4a in the right base 12. According to the information disclosed in the prior art, the structure of the set of hinges 2 can also adopt more other technical solutions.

In order to realize the adjustment of the X and Y directions, the right base 12 is provided with a first displacement adjusting device capable of adjusting the left and right displacement and the internal and external displacement of the front positioning member 4, and is further provided with the ability to adjust the rear positioning. A second displacement adjusting device for displacement of the piece 4a and internal and external displacement. The structure of the first displacement adjusting device and the second displacement adjusting device will be specifically described below.

As shown in FIG. 1 to FIG. 7, the first displacement adjusting device includes a first rack 84 disposed on an outer side surface of the front positioning member 4, and is rotatably disposed on a side of the first rack 84. The first gear 83 meshing with the first rack 84 can drive the front positioning member 4 to move left and right when the first gear 83 is rotated. The first displacement adjusting device further includes a first U-shaped member 6, the tail end of the first U-shaped member 6 is provided with a first adjusting screw hole 65, and the first adjusting screw hole 65 is provided with a first screw a column 5, the top end of the first stud 5 is provided with a central hole 55 capable of driving the operation tool to rotate, the center hole 55 may be in the shape of, for example, a hexagon socket; the first stud 5 is rotatably positioned at The first U-shaped member 6 has a U-shaped opening portion 63 formed by combining a bottom end arm body 61 and a top end arm body 62, wherein the U-shaped opening The first arm hole 64 is provided in the distal end arm body 62 on the portion 63, and the first through hole 64 has a long groove shape extending in the left-right direction.

Secondly, in order to enable the first stud 5 to be rotatably positioned on the base 12, the structure is as shown in FIG. 4. The first stud 5 includes a section of studs 51 and a section of non-threaded cylinders. 52, the non-threaded cylinder 52 is provided with a circle of raised edges 54, the first end of the first stud 5 is further provided with a first central screw hole 53; the base 12 is provided with a first cavity 122, a first cavity hole 123 is defined in a bottom wall of the first cavity 122, and a diameter of the first cavity hole 123 is smaller than an inner diameter of a bottom wall of the first cavity 122 to form a step. The first cavity hole 123 has a smaller aperture than the outer diameter of the protruding edge 54; further includes a first connecting screw 31 and a first spacer 32, and the lead portion of the first connecting screw 31 passes through the first a spacer 32 is then screwed into the first central screw hole 53; thus, the protruding edge 54 of the non-threaded cylinder 52 of the first stud 5 is sunk into the first adjustment threaded hole In a recessed hole 66 provided in the end face of the 65, the non-threaded cylinder 52 is inserted into the first recessed hole 123, so that the first recessed hole 123 can form the non-threaded Radial positioning body 52, a bottom wall of said first bore recess 123 can be formed on the raised edge 54 to the unthreaded axially positioned by means of the cylinder 52. The entire first The stud 5 is screwed to the first U-shaped member 6 and abuts against the inside of the base body 12. After the first connecting screw 31 is installed, the outer side of the head of the first connecting screw 31 is not higher than the outer side of the base 12, and the inner side of the head of the first connecting screw 31 is opposite to the first There is also a gap between the spacer 32 or the bottom wall of the first cavity 122. In this way, the first stud 5 can be rotationally positioned on the base 12.

The first displacement adjusting device further includes a first arm 41 disposed on the front positioning member 4, the first arm 41 is integrally formed with the front positioning member 4, and the first branch The arm 41 is biased to the right of the front positioning member 4. The first arm 41 is provided with a first tightening screw hole 42 corresponding to the first through hole 64, and the first arm 41 is inserted into the U-shaped opening of the first U-shaped member 6. In the 63, the first set screw 7 passes through the first through hole 64 and is screwed into the first set screw hole 42.

According to the above structure, the method of adjusting the left and right and the inside and outside is as follows.

Before the left and right displacement of the front positioning member 4 needs to be adjusted, the first set screw 7 is first loosened to relax between the first U-shaped member 6 and the first arm 41, and then rotated. The first gear drive 83 moves the front positioning member 4 to the left and right, and the first set screw 7 can slide in the left and right direction in the long groove-shaped first through hole 64, and the adjustment is completed to tighten the The first set screw 7. At this time, the first U-shaped member 6 is still defined by the first stud 5 and does not move, so that the positioning in the inner and outer directions is not affected.

When the internal and external displacements of the front positioning member 4 need to be adjusted, the first stud 5 is directly rotated to move the first U-shaped member 6 inside and outside, and the first U-shaped member 6 drives the first The arm 41 moves in the inner and outer directions to displace the front positioning member 4 in the inner and outer directions. Since the front positioning member 4 is provided with a rack structure, the first gear drive 83 does not hinder the movement of the front positioning member 4 in the inner and outer directions.

For this reason, when the front positioning member 4 is moved left and right by driving the first gear 83, it does not affect the position of the inner and outer directions (i.e., the X direction) of the front positioning member 4 that has been determined. Conversely, when the first stud 5 is rotated, the front positioning member 4 can be moved in the inner and outer directions (ie, the X direction), thereby realizing the adjustment of the X direction, and the front portion is not affected during the adjustment process. The position of the positioning member 4 in the Y direction. To this end, the solution of the invention makes it possible to avoid the influence of the adjustment of one direction on the position already determined for the other direction.

Preferably, the second displacement adjustment device is also adapted to be adapted when the first displacement adjustment device is adjusted. The structure of the second displacement adjusting device is substantially the same as the structure of the first displacement adjusting device. To this end, the structure of the second displacement adjustment device will be briefly described below only with respect to the structure already indicated in the drawings.

As shown in FIG. 1 to FIG. 7, the second displacement adjusting device includes a second rack 84a disposed on an outer side surface of the rear positioning member 4a, and is rotatably disposed on a side of the second rack 84a. The second gear 83a meshing with the second rack 84a can drive the rear positioning member 4a to move left and right when the second gear 83a is rotated. The first The second displacement adjusting device further includes a second U-shaped member 6a, wherein the second U-shaped member 6a is provided with a second stud 5a; the second stud 5a is rotatably positioned on the base 12; The second U-shaped member 6a has a U-shaped opening portion. The U-shaped opening portion has a second through hole 64a provided in the front end arm body 62a, and the second through hole 64a has a long groove extending in the left-right direction. shape.

Next, in order to rotatably position the second stud 5a on the base 12, the structure is still as shown in FIG. 4, and the second cavity 122a is disposed on the base 12, and further includes The second connecting screw 31a and the second spacer 32a, the screw portion of the second connecting screw 31a passes through the second spacer 32a and is screwed into the non-threaded cylinder 52a of the second stud 5a. The entire second stud 5a is screwed to the second U-shaped piece 6a and abuts against the inner side of the base body 12. After the second connecting screw 31a is installed, the outer side of the head of the second connecting screw 31a is not higher than the outer side of the base 12, and the inner side of the head of the second connecting screw 31a is opposite to the second side. There is also a gap between the spacer 32a or the bottom wall of the second cavity 122a. Thus, the second stud 5a can be rotationally positioned on the base 12.

The second displacement adjusting device further includes a second arm 41a disposed on the rear positioning member 4a, the second arm 41a is integrally formed with the rear positioning member 4a, and the second branch The arm 41a is biased to the right of the rear positioning member 4a. The second arm 41a is provided with a second tightening screw hole 42a corresponding to the second through hole 64a, and the second arm 41 is inserted into the U-shaped opening of the second U-shaped member 6. The second set screw 7a passes through the second through hole 64a and is screwed into the second set screw hole.

A further technical solution may further include, as shown in FIG. 1 , FIG. 2 and FIG. 3 , a cover plate 124 that can cover the receiving cavity 120 , and the cover plate 124 is provided with the first gear 83 The through hole 125 is fitted to the upper shaft end. An upper shaft end of the first gear 83 extends into the through hole 125; and the base 12 is provided with a shaft hole adapted to a lower shaft end of the first gear 83, The lower shaft end of the first gear 83 is rotatably disposed in the shaft hole such that the first gear 83 is rotatably disposed in the base 12. Correspondingly, a through hole 125a adapted to the upper axial end of the second gear 83a is further disposed on the cover plate 124. An upper shaft end of the second gear 83a extends into the through hole 125a; and the base 12 is provided with a shaft hole adapted to a lower shaft end of the second gear 83a, The lower shaft end of the second gear 83a is rotatably disposed in the shaft hole such that the second gear 83a is rotatably disposed in the base 12.

In a further technical solution, the cover plate 124 is further provided with a scale line 126 corresponding to a pair of marking lines disposed on the pair of positioning members. Thus, when the first gear 83 or the second gear 83a is adjusted, the adjustment amount is correspondingly displayed.

Claims (8)

An adjustable door hinge having an improved adjustment structure, comprising: a pair of base portions respectively detachable to the door frame and the door leaf, each of the base portions including a base and a receiving cavity disposed in the base, each The accommodating chamber is provided with a pair of positioning members composed of a front positioning member and a rear positioning member, the front positioning member and the rear positioning member are arranged in front and rear with a spacing and fixedly connected by the connecting arm, and a pair of the positioning members The member is slidable in the accommodating cavity; a set of hinges are located between the pair of the base portions for forming a plurality of angles between the pair of the base portions, and one set of the hinge members The end rotation shafts of the ends are respectively connected between the front positioning member and the rear positioning member in the corresponding base portion; wherein one of the bases is provided with a left and right displacement capable of adjusting the front positioning member and a first displacement adjusting device for internal and external displacement, further provided with a second displacement adjusting device capable of adjusting left and right displacement and internal and external displacement of the rear positioning member; wherein the first displacement adjusting device comprises a front positioning a first rack, a first gear disposed on a side of the first rack and engageable with the first rack, and capable of driving the front positioning member to move left and right when the first gear is rotated The first displacement adjusting device further includes a first U-shaped member, the tail end of the first U-shaped member is provided with a first adjusting threaded hole, and the first adjusting threaded hole is provided with a first stud, a top end of the first stud is provided with a central hole capable of driving the operating tool to rotate, the first stud is rotatably positioned on the base; the first U-shaped member has a U-shaped opening portion a first through hole is formed on the front arm body of the U-shaped opening portion, and the first through hole has a long groove shape extending in the left-right direction; the first displacement adjusting device further includes a first disposed on the front positioning member An arm, the first arm is biased on one side of the front positioning member, and the first arm is provided with a first tightening threaded hole corresponding to the first through hole, the first An arm is inserted into the U-shaped opening of the first U-shaped member, and the first set screw passes through the first through hole Rotating in the first tightening screw hole; the second displacement adjusting device includes a second rack disposed on the rear positioning member, and the rotation is disposed on a side of the second rack The second gear meshed by the second rack, the second positioning gear can drive the rear positioning member to move left and right; the second displacement adjusting device further includes a second U-shaped member, the second U-shaped a second adjusting threaded hole is disposed at a tail end of the piece, a second stud is disposed in the second adjusting threaded hole, and a top end of the second stud is provided with a center hole capable of driving the operating tool to rotate, a second stud is rotatably positioned on the base; the second U-shaped member has a U-shaped opening, and a second through hole is disposed on the top arm of the U-shaped opening, the second pass The hole has a long groove shape extending in the left-right direction; the second displacement adjusting device further includes a second arm disposed on the rear positioning member, the second arm being biased on one side of the rear positioning member, The second arm is provided with a second tightening threaded hole corresponding to the second through hole, The second arm is inserted into the U-shaped opening of the second U-shaped member, and the second set screw is passed through the second through hole and then screwed into the second fixed threaded hole. The adjustable door hinge according to claim 1, wherein a tail end of the first stud has a non-threaded cylinder, and the non-threaded cylinder is provided with a looped edge, the first The end of the stud is also provided with the first middle a central cavity; a first cavity is disposed on the base; a first cavity is disposed on a bottom wall of the first cavity, and a diameter of the first cavity is smaller than a bottom of the first cavity An inner diameter of the wall; further comprising a first connecting screw, the screw portion of the first connecting screw being screwed in the first central screw hole, a head of the first connecting screw and a bottom wall of the first cavity There is a gap between them. The adjustable door hinge according to claim 2, wherein a first spacer is disposed between the head of the first connecting screw and the bottom wall of the first cavity, the first spacer and There is a gap between the head of the first connecting screw or the bottom wall of the first cavity. The adjustable door hinge according to claim 1, wherein a tail end of the second stud has a non-threaded cylinder, and the non-threaded cylinder is provided with a looped edge, the second The tail end of the stud is further provided with a second central screw hole; the base is provided with a second cavity, and the bottom wall of the second cavity is provided with a second cavity hole, the second cavity hole a smaller aperture than the inner diameter of the bottom wall of the second cavity; further comprising a second connecting screw, the screw portion of the second connecting screw being screwed into the second central screw hole through the second cavity a gap is formed between the head of the second connecting screw and the bottom wall of the second cavity. The adjustable door hinge according to claim 4, wherein a second spacer is disposed between the head of the second connecting screw and the bottom wall of the second cavity, and the second spacer is There is a gap between the head of the second connecting screw or the bottom wall of the second cavity. The adjustable door hinge according to any one of claims 1 to 5, further comprising a cover plate capable of covering the receiving cavity, the cover plate being provided with an upper axial extension end of the first gear With a through hole. The adjustable door hinge according to claim 6, wherein an upper shaft extending end of the first gear extends into the through hole; and a lower portion of the first gear is disposed on the base The shaft end is adapted to the shaft hole, and the lower shaft end of the first gear is rotatably disposed in the shaft hole. The adjustable door hinge according to claim 6, wherein a scale line corresponding to a pair of marking lines provided on the pair of positioning members is further disposed on the cover plate.

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