A door hinge

Abstract

The present invention belongs to the technical field of hinges and proposes a door hinge, wherein a first adjustment mechanism is provided inside a hinge seat and moves back and forth along its installation direction, the hinge core is located on one side of the first adjustment mechanism, a second adjustment mechanism and a third adjustment mechanism are fixedly arranged on the first adjustment mechanism, and the hinge core, the second adjustment mechanism and the third adjustment mechanism all move synchronously with the first adjustment mechanism; the hinge core comprises a core part, a first adjustment part and a second adjustment part, the first adjustment part is located at one end of the core part away from the first adjustment mechanism, and the second adjustment part is located outside the core part; the second adjustment mechanism drives the second adjustment part to rotate, and the rotation of the second adjustment part drives the core part to move in a direction perpendicular to the plane where the first adjustment mechanism is located, and the third adjustment mechanism drives the first adjustment part to rotate, thereby the present invention has the advantages of compact structure, small size, and the height and horizontal directions can be adjusted again after installation, and the pre-tightening angle can also be adjusted.

Description

Technical Field

[0001] The present invention belongs to the technical field of hinges, and particularly relates to a door hinge. Background Art

[0002] At present, freezers (such as freezers for storing food at low temperatures in supermarkets) are the main equipment commonly used for storing food. A freezer generally includes a cabinet door and a cabinet body. The cabinet door can be rotated and opened or closed on the cabinet body to open or close the internal space of the cabinet body. The above process is achieved by fixedly arranging a door hinge on the cabinet body of the freezer. The door hinge includes a hinge seat and a hinge core. The end of the cylindrical door shaft on the freezer cabinet door is inserted into the hinge core of the door hinge. Since there is a spring inside the door shaft body, a certain torsional force is generated on the door shaft itself during the process of fixing the door shaft to the door hinge (that is, the door shaft body is fixedly connected to the cabinet door, and then the hexagonal bolt at the end of the door shaft is rotated by a certain angle and then fixed into the hinge core, so that the spring inside the door shaft body generates a certain torsional force. The process of rotating the hexagonal bolt at the end of the door shaft and then matching it with the hinge core is called pre-tightening). During the rotation of the cabinet door, the rotation of the cabinet door is achieved by the self-torsional force of the door shaft, so as to achieve the rotation of the cabinet door on the cabinet body to open or close the cabinet body. When installing the cabinet door on the cabinet body, door shafts are provided at both the top and bottom of the cabinet door, door hinges are provided at the mating positions of the cabinet body and the door shafts of the cabinet door, and then the ends of the door shafts fixed on the cabinet door are inserted into the hinge cores to achieve the mating installation of the cabinet door and the cabinet body.

[0003] When installing the cabinet door, in order to make the cooperation between the cabinet door and the cabinet body more precise, it is necessary to finely adjust the mating position of the door shaft and the hinge core to ensure that they are coaxially arranged. However, the door hinge in the prior art is pre-fixed on the cabinet body and has no adjustment mechanism inside. After inserting the door shaft into the hinge core, the weight of the cabinet door falls between the cabinet body and the cabinet door and the gap between them is relatively narrow, so the position of the hinge core cannot be adjusted anymore, and thus the mating position of the hinge core and the door shaft cannot be adjusted, and the rotation angle of the mating position of the door shaft and the hinge core, that is, the pre-tightening angle, cannot be adjusted either. Summary of the Invention

[0004] The present invention provides a door hinge, which solves the problems in the prior art that the mating position between the door shaft and the door hinge cannot be adjusted and the pre-tightening angle of the mating position between the door shaft and the door hinge cannot be adjusted.

[0005] The technical solution of the present invention is implemented as follows: a door hinge is fixedly set on a cabinet body, the door hinge includes a hinge seat and a hinge core, the hinge seat has a cavity, the hinge core is located in the cavity of the hinge seat for connecting the door axis, the hinge seat has a first adjustment mechanism that moves back and forth along its installation direction, the hinge core is located on one side of the first adjustment mechanism, the first adjustment mechanism is fixedly provided with a second adjustment mechanism and a third adjustment mechanism, the hinge core, the second adjustment mechanism and the third adjustment mechanism all move synchronously with the first adjustment mechanism; the hinge core includes a core part, a first adjustment part and a second adjustment part, the first adjustment part is located at one end of the core part away from the first adjustment mechanism, and the second adjustment part is located outside the core part; the second adjustment mechanism drives the second adjustment part to rotate, the second adjustment part rotates to drive the core part to move in a direction perpendicular to the plane where the first adjustment mechanism is located, and the third adjustment mechanism drives the first adjustment part to rotate.

[0006] By setting the first adjustment mechanism and the second adjustment mechanism in the door hinge, the position of the hinge core can be adjusted in two planes perpendicular to each other, so that the fitting point of the hinge core and the door shaft is also adjusted accordingly. By setting the third adjustment mechanism, the rotation position of the hinge core can be adjusted, so that the rotation angle of the fitting point of the door shaft and the door hinge is rotated to a suitable angle, thereby realizing the pre-tightening process of the door shaft.

[0007] As a preferred embodiment, a first adjustment groove and a second adjustment groove are respectively provided on both sides of the hinge seat, and two ends of the first adjustment mechanism move at the first adjustment groove and the second adjustment groove respectively, and a plurality of equally distributed upper grooves are connected to the first adjustment groove, and a lower groove corresponding to the upper groove is provided at the end of the first adjustment mechanism, and the plurality of upper grooves and lower grooves cooperate to form adjustment holes of different heights, and operation holes are respectively provided at the ends of the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism, and each of the operation holes corresponds to a different adjustment hole.

[0008] As a preferred embodiment, the first adjustment mechanism includes a support plate, a movable hole is opened on the side of the support plate away from the hinge core, the hinge seat includes an upper shell and a lower shell, the hinge core is located between the upper shell and the support plate, the first adjustment part and the second adjustment part are rotatably matched with the upper shell and the support plate respectively, a support block is fixedly provided on the lower shell, the support block is threaded with a first adjustment worm, a baffle is provided in the upper shell, the baffle extends from the inner wall of the upper shell to between the first adjustment worm and the hinge core, the baffle is located in the movable hole, and the first adjustment worm rotates to drive the upper shell, the support plate and the hinge core to move synchronously along the installation direction of the lower shell.

[0009] As a preferred embodiment, an insert block is fixedly installed on the support plate, an arc groove is provided on the side of the baffle plate opposite to the first adjusting worm, the side of the insert block opposite to the upper shell is inserted into the arc groove and cooperates with the arc groove to form a third circular hole, and the side of the first adjusting worm opposite to the hinge core is rotatably arranged in the third circular hole.

[0010] As a preferred embodiment, a rotating groove is provided on one side of the support plate, the second adjusting mechanism is rotatably arranged in the rotating groove, a bracket is provided on the other side of the support plate, the third adjusting mechanism is rotatably arranged on the bracket, a first round hole is opened on one side of the upper housing, a second round hole corresponding to the first round hole is opened on the support plate, the first adjusting part is rotatably arranged in the first round hole, and the second adjusting part is arranged in the second round hole.

[0011] As a preferred embodiment, a first toothed ring is fixedly arranged along the circumferential direction on the outer side of the first adjusting part, the first adjusting mechanism meshes with the first toothed ring to drive the first toothed ring to rotate, a polygonal hole is opened at one end of the first adjusting part away from the core part, a first cylindrical hole is opened at one end of the first adjusting part corresponding to the core part, the core part is movably arranged in the first cylindrical hole, the polygonal hole communicates with the first cylindrical hole, and the diameter of the first cylindrical hole is larger than the width of the widest part of the polygonal hole.

[0012] As a preferred embodiment, a second toothed ring is fixedly arranged along the circumferential direction on the outer side of the second adjusting part, the second adjusting mechanism meshes with the second toothed ring to drive the second toothed ring to rotate, a second cylindrical hole is opened along the axial direction of the second adjusting part, internal threads are arranged on the surface of the second cylindrical hole, external threads are arranged on the outer side of the core part, and the internal threads are in threaded connection with the external threads.

[0013] As a preferred embodiment, a third cylindrical hole penetrates along the axial direction in the center of the core part, the first cylindrical hole, the second cylindrical hole and the third cylindrical hole are coaxially arranged, the core part moves along the axial directions of the first cylindrical hole and the second cylindrical hole, and the diameter of the core part is larger than the width of the widest part of the polygonal hole and smaller than the diameter of the first cylindrical hole.

[0014] As a preferred embodiment, a plurality of equally spaced chutes are opened on the surface of the core part along the axial direction, a spacer plate is arranged between the first adjusting part and the second adjusting part, a fourth cylindrical hole is opened on the spacer plate, a guiding block corresponding to the chute is fixedly arranged on the surface of the fourth cylindrical hole, and the guiding block is inserted into the chute and is movably matched with the chute.

[0015] As a preferred embodiment, an installation part is vertically and integrally arranged at the bottom of the lower housing, a threaded hole is opened in the installation part, and the threaded hole is coaxially arranged with the hinge core.

[0016] After adopting the above technical solutions, the beneficial effects of the present invention are:

[0017] 1. In the present invention, the adjustment of the hinge core in the horizontal direction is achieved by driving a first adjusting worm, and the adjustment of the hinge core in the vertical direction is achieved by adjusting a third adjusting component. The change in the pre-tightening angle of the hinge core is driven by a second adjusting component. The above three adjustment methods of the hinge core are all realized by a worm and gear structure, and the three adjustment structures are integrated into the same part, making the integration degree of each component of the door hinge relatively high;

[0018] 2. When adjusting the position of the cabinet door in the horizontal direction, drive the first adjusting worm to rotate, driving the upper housing, hinge core and support plate to move to a suitable position in the horizontal direction. At this time, the hinge core engaged with the end of the door shaft moves in the horizontal direction to a direction perpendicular to the lower housing, and the adjustment of the cabinet door in the vertical direction can be realized. This adjustment process can be achieved only by driving the first adjusting worm to rotate, and the operation is simple;

[0019] 3. When adjusting the position of the cabinet door in the vertical ground direction, drive the second adjusting mechanism to rotate, driving the second adjusting part to rotate. The rotation of the second adjusting part drives the core part inside it to move up and down. At this time, the core part engaged with the end of the door shaft is in the vertical direction, and the height adjustment of the cabinet door in the vertical direction can be realized. The height adjustment of the core part is achieved by the rotation of the second adjusting part, and the horizontal adjustment of the core part is achieved by the first adjusting mechanism. The horizontal and height directions can be adjusted separately or simultaneously, and the adjustment process can be realized within a limited range;

[0020] 4. Drive the third adjusting mechanism to drive the first adjusting part to rotate. The rotation of the first adjusting part drives the polygonal hole to rotate to a suitable pre-tightening angle. Integrating the height adjustment, horizontal adjustment and pre-tightening angle adjustment into one door hinge makes the door hinge structure compact and small in volume. After installation, the matching position between the cabinet door and the cabinet body can be adjusted again, and the adjustment process is less restricted by space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is Figure 1 a schematic right-side structural diagram;

[0024] Figure 3 is Figure 1 a schematic bottom-up structural diagram;

[0025] Figure 4 isFigure 1 Schematic structural diagram of removing the upper housing;

[0026] Figure 5 is Figure 4 Schematic bottom view;

[0027] Figure 6 Schematic structural diagram of the first adjusting mechanism, the second adjusting mechanism and the third adjusting mechanism of the present invention cooperating with the hinge core;

[0028] Figure 7 Schematic structural diagram of the hinge core of the present invention;

[0029] Figure 8 of the present invention Figure 7 Schematic structural diagram of removing the first adjusting part;

[0030] Figure 9 of the present invention Figure 8 Schematic structural diagram of removing the core part;

[0031] Figure 10 Schematic structural diagram of the first adjusting part of the present invention

[0032] Figure 11 Front view of the lower housing of the present invention;

[0033] Figure 12 of the present invention Figure 11 Schematic cross-sectional view at A-A of the present invention;

[0034] Figure 13 Schematic structural diagram between the adjusting hole corresponding to the first adjusting worm and the third round hole;

[0035] Figure 14 Schematic structural diagram of the third round hole;

[0036] Figure 15 Schematic structural diagram of the adjusting hole corresponding to the first adjusting worm.

[0037] In the figure, 1 - hinge base; 11 - first adjustment groove; 111 - upper groove; 12 - second adjustment groove; 13 - upper housing; 131 - baffle; 1311 - arc groove; 1312 - third round hole; 132 - first round hole; 14 - lower housing; 141 - support block; 1412 - first adjustment worm; 142 - mounting portion; 1421 - threaded hole; 2 - hinge core; 21 - core portion; 211 - third cylindrical hole; 212 - chute; 22 - first adjustment portion; 221 - first gear ring; 222 - polygonal hole; 223 - first cylindrical hole; 23 - second adjustment portion; 231 - second gear ring; 232 - second cylindrical hole; 24 - spacer; 241 - fourth cylindrical hole; 2411 - guide block; 3 - first adjustment mechanism; 31 - lower groove; 32 - support plate; 321 - movable hole; 322 - insertion block; 323 - rotation groove; 324 - bracket; 325 - second round hole; 33 - adjustment hole; 331 - operation hole; 4 - second adjustment mechanism; 5 - third adjustment mechanism. Detailed implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0039] As Figures 1 - 12 shown, a door hinge is fixedly arranged on a cabinet body. The door hinge includes a hinge base 1 and a hinge core 2. The hinge base 1 has a cavity, and the hinge core 2 is located in the cavity of the hinge base 1 for connecting a door shaft. A first adjustment mechanism 3 that moves back and forth along its installation direction is arranged inside the hinge base 1. The hinge core 2 is located on one side of the first adjustment mechanism 3. A second adjustment mechanism 4 and a third adjustment mechanism 5 are fixedly arranged on the first adjustment mechanism 3. The hinge core 2, the second adjustment mechanism 4, and the third adjustment mechanism 5 all move synchronously with the first adjustment mechanism 3. The hinge core 2 includes a core portion 21, a first adjustment portion 22, and a second adjustment portion 23. The first adjustment portion 22 is located at one end of the core portion 21 away from the first adjustment mechanism 3, and the second adjustment portion 23 is located outside the core portion 21. The second adjustment mechanism 4 drives the second adjustment portion 23 to rotate, and the rotation of the second adjustment portion 23 drives the core portion 21 to move along a direction perpendicular to the plane where the first adjustment mechanism 3 is located. The third adjustment mechanism 5 drives the first adjustment portion 22 to rotate.

[0040] When the cabinet door is installed on the cabinet body, the hinge is pre-installed on the cabinet body. When the door shaft on the door body is inserted into the hinge, the end of the door shaft sequentially passes through the first adjustment part 22, the core part 21 and the second adjustment part 23 of the hinge core 2. The hexagon bolt of the door shaft is inserted into the first adjustment part 22, and the part of the end of the door shaft in the axial direction passing through the core part 21 is fixedly connected to the core part 21 (the fixed connection can adopt the interference fit method, which is the prior art and will not be elaborated in this patent), completing the preliminary installation of the cabinet door; after the preliminary installation is completed, further precise adjustment is required. At this time, first drive the first adjustment mechanism 3 to move back and forth along the installation direction of the hinge (that is, the horizontal direction perpendicular to the door shaft). The back-and-forth movement of the first adjustment mechanism 3 drives the hinge core 2 to move synchronously. During the movement of the hinge core 2, the position of the fixed cooperation between the door shaft and the hinge core 2 moves with the movement of the hinge core 2. Through continuous debugging, the cooperation position of the door shaft and the hinge core 2 is coaxial and their axes coincide. This process is to adjust the position of the hinge core 2 in the setting direction of the hinge. During the adjustment process of the hinge core 2 along the setting direction of the hinge, the depth of the cooperation between the door shaft and the hinge will change accordingly. At this time, it is necessary to drive the second adjustment mechanism 4 to drive the second adjustment part 23 to rotate. The rotation of the second adjustment part 23 drives the core part 21 to move along the direction perpendicular to the plane where the hinge is set. During the movement of the core part 21, the door shaft is driven to move, realizing the movement of the door shaft in the vertical direction. Since the door shaft body is fixedly connected to the cabinet door, during the above adjustment process, the distance between the cabinet door and the door shaft and the hinge is in a suitable position. After the hinge core 2 is adjusted in the above two mutually perpendicular directions, drive the third adjustment mechanism 5 to adjust the rotation angle of the first adjustment part 22. Since the hexagon bolt of the door shaft is located in the first adjustment part 22, the rotation of the first adjustment part 22 drives the rotation of the part of the hexagon bolt of the door shaft, while the part of the hexagon bolt fixed to the door shaft body inside the cabinet door rotates, causing a certain torsion force in the spring inside the door shaft body. Through the setting of the first adjustment mechanism 3 and the second adjustment mechanism 4 in the hinge, the position of the hinge core 2 is adjusted in two mutually perpendicular planes, so the cooperation position between the hinge core 2 and the door shaft is also adjusted accordingly. Through the setting of the third adjustment mechanism 5, the rotation position of the hinge core 2 is adjusted, so that the rotation angle of the cooperation between the door shaft and the hinge is adjusted to a suitable angle, realizing the pre-tightening process of the door shaft.

[0041] Combined with Figure 2 , first adjustment grooves 11 and second adjustment grooves 12 are respectively formed on both sides of the hinge seat 1. The two ends of the first adjustment mechanism 3 move at the positions of the first adjustment groove 11 and the second adjustment groove 12 respectively. A plurality of equally spaced upper grooves 111 are communicated and arranged at the position of the first adjustment groove 11. A lower groove 31 corresponding to the upper groove 111 is arranged at the end of the first adjustment mechanism 3. A plurality of upper grooves 111 and lower grooves 31 cooperate to form adjustment holes 33 with different heights. Operation holes 331 are respectively arranged at the ends of the first adjustment mechanism 3, the second adjustment mechanism 4 and the third adjustment mechanism 5. Each operation hole 331 corresponds to a different adjustment hole 33.

[0042] Since the adjusting hole 33 is located on one side of the door hinge and the door hinge is thin, when adjusting the position of the hinge core 2 after installing the door hinge between the cabinet door and the cabinet body, the operator can insert a single driving rod through the adjusting hole 33 into the operation hole 331 and fix it with the operation hole 331 (where the driving rod can be a screw tool and the operation hole 331 can be a hole matching the screw tool). The rotation of the driving rod drives the first adjusting mechanism 3 to move back and forth at the first adjusting groove 11 and the second adjusting groove 12. The driving rod can be inserted for operation within the narrow gap between the cabinet door and the cabinet body. The adjusting mechanism of this door hinge can be adjusted only by the driving rod, and the driving rod only requires a small space to work, making the adjustment operation of the hinge core 2 convenient. The diameter of the adjusting hole 33 is smaller than the diameters of the ends of the first adjusting worm 1412, the second adjusting mechanism 4, and the third adjusting mechanism 5. This setting method prevents the first adjusting worm 1412, the second adjusting mechanism 4, and the third adjusting mechanism 5 from detaching from the door hinge through the adjusting hole 33 when adjusted to the limit position. The width of the widest part of the operation hole 331 is smaller than the diameter of the adjusting hole 33. Therefore, during the adjustment process, the operating tool can smoothly pass through the adjusting hole 33 and insert into the operation hole 331.

[0043] Combined with Figure 6 and Figure 12 , a mounting portion 142 is vertically and integrally provided at the bottom of the lower housing 14. A threaded hole 1421 is provided in the mounting portion 142, and the threaded hole 1421 is coaxially arranged with the hinge core 2. The first adjusting mechanism 3 includes a support plate 32. A moving hole 321 is provided on the side of the support plate 32 facing away from the hinge core 2. The hinge seat 1 includes an upper housing 13 and a lower housing 14. The hinge core 2 is located between the upper housing 13 and the support plate 32. The first adjusting portion 22 and the second adjusting portion 23 are respectively rotationally matched with the upper housing 13 and the support plate 32. A support block 141 is fixedly provided on the lower housing 14. A first adjusting worm 1412 is threadedly engaged with the support block 141. A baffle 131 is provided in the upper housing 13. The baffle 131 extends from the inner wall of the upper housing 13 between the first adjusting worm 1412 and the hinge core 2. The support block 141 is located in the moving hole 321. The rotation of the first adjusting worm 1412 drives the upper housing 13, the support plate 32, and the hinge core 2 to move synchronously along the installation direction of the lower housing 14. A plug 322 is fixedly provided on the support plate 32. An arc-shaped groove 1311 is provided on the side of the baffle 131 opposite to the first adjusting worm 1412. The side of the plug 322 opposite to the upper housing 13 is inserted into the arc-shaped groove 1311 and cooperates with the arc-shaped groove 1311 to form a third circular hole 1312. Combined with Figures 13 - 15, the third round hole 1312 is a non-penetrating blind hole. The diameter of the adjusting hole 33 corresponding to the first adjusting worm 1412 is smaller than the diameter of the first adjusting worm 1412, and the diameter of the third round hole 1312 is larger than the diameter of the first adjusting worm 1412. A region is formed between the adjusting hole 33 corresponding to the first adjusting worm 1412 and the third round hole 1312 to accommodate the rotation of the first adjusting worm 1412 and prevent the first adjusting worm 1412 from displacing. The side of the first adjusting worm 1412 opposite to the hinge core 2 is rotatably arranged in the third round hole 1312.

[0044] During the process of fixing the door hinge on the cabinet door, the installation part 142 is inserted into the reserved hole of the cabinet body, and then a bolt passes through the cabinet body and is fixedly connected to the threaded hole 1421 of the installation part 142 to fix the lower housing 14 on the cabinet body. The first adjusting worm 1412 is located in the third round hole 1312 formed by the cooperation of the baffle 131 and the arc-shaped groove 1311. Considering the setting method of the size of the adjusting hole 33, the first adjusting worm 1412 is located between the baffle 131 of the upper housing 13 and the side wall of the upper housing 13. Therefore, the first adjusting worm 1412 is restricted between the adjusting hole 33 and the baffle 131. At the same time, the top and bottom of the hinge core 2 are respectively rotatably matched with the upper housing 13 and the support plate 32. Therefore, the upper housing 13, the support plate 32 and the hinge core 2 form an integral body. During the process of driving the first adjusting worm 1412 to rotate, the first adjusting worm 1412 only rotates between the third round hole 1312 and the adjusting hole 33. Also, since the lower housing 14 is fixed on the cabinet body and the support block 141 is fixedly connected to the lower housing 14, when the position of the threaded connection between the rotating first adjusting worm 1412 and the support block 141 changes, it drives the upper housing 13, the support plate 32 and the hinge core 2 to move linearly simultaneously with the change of the position of the first adjusting worm 1412. Through this process, the adjustment of the position of the hinge core 2 along the setting direction of the door hinge is realized.

[0045] A rotating groove 323 is provided on one side of the support plate 32. The second adjusting mechanism 4 is rotatably arranged in the rotating groove 323. A bracket 324 is provided on the other side of the support plate 32. The third adjusting mechanism 5 is rotatably arranged on the bracket 324. A first round hole 132 is opened on one side of the upper housing 13. A second round hole 325 corresponding to the first round hole 132 is opened on the support plate 32. The first adjusting part 22 is rotatably arranged in the first round hole 132. The second adjusting part 23 is arranged in the second round hole 325.

[0046] Combined with Figure 4 and Figure 6, when driving the second adjusting mechanism 4 and the third adjusting mechanism 5 through the operating tool, the second adjusting mechanism 4 rotates in the rotating groove 323, and the third adjusting mechanism 5 rotates on the support 324. When the second adjusting mechanism 4 rotates to drive the first adjusting part 22 to rotate, one end of the first adjusting part 22 is rotatably arranged in the first round hole 132. When the third adjusting mechanism 5 rotates to drive the second adjusting part 23 to rotate, one end of the second adjusting part 23 is rotatably arranged in the second round hole 325. By converting the rotation of the second adjusting mechanism 4 and the third adjusting mechanism 5 themselves into the rotation of the first adjusting part 22 and the second adjusting part 23, they perform circular motion in a plane. The rotation of the first adjusting part 22 drives the polygonal hole 222 opened at its top to rotate by a certain angle, realizing the change of the pre-tightening angle. The rotation of the second adjusting part 23 rotates the second cylindrical hole 232 inside it, and the internal threaded core part 21 of the second cylindrical hole 232 is in threaded fit with the external thread, driving the core part 21 to move in the direction perpendicular to the installation direction of the door hinge, realizing the adjustment of the depth position of the core part 21 in the hinge core 2.

[0047] Combined with Figures 7 - 10 , a first toothed ring 221 is fixedly arranged in a circumferential direction along the outer side of the first adjusting part 22. The third adjusting mechanism 5 meshes with the first toothed ring 221 to drive the first toothed ring 221 to rotate. One end of the first adjusting part 22 away from the core part 21 is provided with a polygonal hole 222, and one end of the first adjusting part 22 corresponding to the core part 21 is provided with a first cylindrical hole 223. The core part 21 is movably arranged in the first cylindrical hole 223. The polygonal hole 222 communicates with the first cylindrical hole 223, and the diameter of the first cylindrical hole 223 is larger than the width of the widest part of the polygonal hole 222.

[0048] During the rotation of the third adjusting mechanism 5, the third adjusting mechanism 5 meshes with the first toothed ring 221 on the outer side of the first adjusting part 22. By the rotation of the third adjusting mechanism 5, the first adjusting part 22 is driven to rotate. During the rotation of the first adjusting part 22, the polygonal hole 222 arranged on its body is driven to rotate by a certain angle, realizing the adjustment of the pre-tightening angle.

[0049] A second toothed ring 231 is fixedly arranged in a circumferential direction along the outer side of the second adjusting part 23. The second adjusting mechanism 4 meshes with the second toothed ring 231 to drive the second toothed ring 231 to rotate. The second adjusting part 23 is provided with a second cylindrical hole 232 along its axial direction. The surface of the second cylindrical hole 232 is provided with internal threads, and the outer side of the core part 21 is provided with external threads. The internal threads and the external threads are in threaded connection.

[0050] During the rotation of the second adjustment mechanism 4, the second adjustment mechanism 4 meshes with the second gear ring 231 on the outer side of the second adjustment part 23. The rotation of the second adjustment mechanism 4 drives the rotation of the second adjustment part 23. During the rotation of the second adjustment part 23, the mating position of the internal thread on the inner wall and the external thread on the outer side of the core part 21 changes, driving the core part 21 to change along the axial direction of the second cylindrical hole 232. Since the axial directions of the first cylindrical hole 223 and the second cylindrical hole 232 are perpendicular to the setting direction of the door hinge, the position of the core part 21 changes in the vertical direction where the door hinge is set, realizing the adjustment of the matching depth between the door shaft and the hinge core 2.

[0051] A third cylindrical hole 211 runs through the center of the core part 21 along its axial direction. The first cylindrical hole 223, the second cylindrical hole 232, and the third cylindrical hole 211 are coaxially arranged. The core part 21 moves along the axial directions of the first cylindrical hole 223 and the second cylindrical hole 232 within them. The diameter of the core part 21 is larger than the width of the widest part of the polygonal hole 222 and smaller than the diameter of the first cylindrical hole 223, ensuring that the core part 21 only moves within the first cylindrical hole 223 and the second cylindrical hole 232, preventing the core part 21 from slipping out of the hinge core 2. The third cylindrical hole 211 provided in the core part 21 facilitates the insertion of the door shaft into its interior.

[0052] A number of equally spaced chutes 212 are provided on the surface of the core part 21 along its axial direction. A spacer plate 24 is arranged between the first adjustment part 22 and the second adjustment part 23. A fourth cylindrical hole 241 is provided on the spacer plate 24. A guide block 2411 corresponding to the chute 212 is fixedly arranged on the surface of the fourth cylindrical hole 241. The guide block 2411 is inserted into the chute 212 and is movably matched with the chute 212. During the process of the core part 21 moving axially along the second cylindrical hole 232 to the first cylindrical hole 223, the core part 21 passes through the fourth cylindrical hole 241 on the spacer plate 24. The position adjustment of the core part 21 during the linear movement process is realized through the movement of the guide block 2411 within the chute 212, preventing the core part 21 from rotating circumferentially.

[0053] Taking the lower right door hinge and door hinge of a normal right-opening refrigerator as an example to illustrate the door hinge of the present invention: The lower outer casing 14 is fixedly installed to the lower right of the cabinet body through its installation part 142. The door hinge on the cabinet door is inserted into the hinge core 2. At this time, the upper outer casing 13 and the inner hinge core 2 are located between the cabinet door and the cabinet body. When it is necessary to finely adjust the fitting position between the cabinet door and the cabinet body so that there is no deviation in both the horizontal and vertical directions of the cabinet door, the operator inserts the operating tool between the cabinet door and the cabinet body and inserts it into the operating hole 331 along the adjustment hole 33. When adjusting the position of the cabinet door in the horizontal direction, the first adjustment worm 1412 is driven to rotate, driving the upper outer casing 13, the hinge core 2 and the support plate 32 to move to a suitable position in the horizontal direction. At this time, the hinge core 2 engaged with the end of the door hinge moves in the horizontal direction, realizing the adjustment of the cabinet door in the horizontal direction; when adjusting the position of the cabinet door in the direction perpendicular to the ground, the second adjustment mechanism 4 is driven to rotate, driving the second adjustment part 23 to rotate. The rotation of the second adjustment part 23 drives the core part 21 inside it to move up and down. At this time, the core part 21 engaged with the end of the door hinge is in the vertical direction, realizing the height adjustment of the cabinet door in the vertical direction. Through the above two processes, the adjustment of the hinge core 2 in the left-right direction and the up-down direction is realized. After the above adjustment process, the third adjustment mechanism 5 is driven to drive the first adjustment part 22 to rotate. The rotation of the first adjustment part 22 drives the polygonal hole 222 to rotate to a suitable pre-tightening angle. This door hinge has a compact structure and a small volume, and the adjustment process can be realized within a limited range, and the operation is convenient.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0055] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A door hinge fixedly arranged on a cabinet body. The door hinge comprises a hinge seat (1) and a hinge core (2). The hinge seat (1) comprises an upper outer shell (13) and a lower outer shell (14). The hinge seat (1) has a cavity, and the hinge core (2) is located in the cavity of the hinge seat (1) for connecting a door shaft. It is characterized in that, The hinge base (1) internally has a first adjusting mechanism (3) that moves back and forth along the installation direction of the hinge base (1), and this installation direction is the horizontal direction perpendicular to the door shaft; the hinge core (2) is located on one side of the first adjusting mechanism (3), and the hinge core (2) includes a core part (21), a first adjusting part (22), and a second adjusting part (23). The end of the door shaft sequentially passes through the first adjusting part (22), the core part (21), and the second adjusting part (23) of the hinge core (2); both the second adjusting part (23) and the first adjusting part are located outside the core part (21), and the first adjusting part (22) is located at one end of the second adjusting part (23) away from the lower housing (14) of the hinge base (1). A second adjusting mechanism (4) and a third adjusting mechanism (5) are also arranged in the cavity. The hinge core (2), the second adjusting mechanism (4), and the third adjusting mechanism (5) all move synchronously with the first adjusting mechanism (3). The movement of the first adjusting mechanism (3) drives the hinge core (2) to move synchronously along the above-mentioned installation direction; during the movement of the hinge core (2) along the above-mentioned installation direction, the second adjusting part (23) is driven to rotate by driving the second adjusting mechanism (4) to drive the core part (21) to move along the direction perpendicular to the installation direction of the hinge base (1); the first adjusting part (22) is driven to rotate through the third adjusting mechanism (5), thereby adjusting the rotation position of the hinge core. A plurality of equally spaced chutes (212) are axially formed on the surface of the core part (21). A spacer plate (24) is arranged between the first adjusting part (22) and the second adjusting part (23). A fourth cylindrical hole (241) is formed on the spacer plate (24). A guide block (2411) corresponding to the chute (212) is fixedly arranged on the surface of the fourth cylindrical hole (241). The guide block (2411) is inserted into the chute (212) and is movably matched with the chute (212).

2. The door hinge according to claim 1, characterized in that, A first adjusting groove (11) and a second adjusting groove (12) are respectively formed on both sides of the hinge base (1). The two ends of the first adjusting mechanism (3) move at the first adjusting groove (11) and the second adjusting groove (12) respectively. A plurality of equally spaced upper grooves (111) are communicated at the first adjusting groove (11). A lower groove (31) corresponding to the upper groove (111) is arranged at the end of the first adjusting mechanism (3). A plurality of the upper grooves (111) and the lower groove (31) cooperate to form adjusting holes (33) with different heights. Operation holes (331) are respectively arranged at the ends of the first adjusting mechanism (3), the second adjusting mechanism (4), and the third adjusting mechanism (5). Each operation hole (331) corresponds to a different adjusting hole (33).

3. The door hinge according to claim 1, characterized in that, The first adjustment mechanism (3) comprises a support plate (32), a movable hole (321) being provided on a side of the support plate (32) facing away from the hinge core (2), the hinge core (2) being located between the upper shell (13) and the support plate (32), the first adjustment portion (22) and the second adjustment portion (23) being rotatably matched with the upper shell (13) and the support plate (32) respectively, the lower shell (14) being fixedly provided with a support block (141), a threaded portion on the support block (141) being engaged with the hinge core (2) A first adjusting worm (1412) is provided, a baffle (131) is arranged in the upper shell (13), the baffle (131) extends from the inner wall of the upper shell (13) to between the first adjusting worm (1412) and the hinge core (2), the support block (141) is movably arranged in the movable hole (321), and the first adjusting worm (1412) rotates to drive the upper shell (13), the support plate (32) and the hinge core (2) to move synchronously along the installation direction of the lower shell (14).

4. The door hinge according to claim 3, characterized in that, An insert block (322) is fixedly arranged on the support plate (32); an arc-shaped groove (1311) is arranged on a side of the baffle plate (131) opposite to the first adjusting worm (1412); a side of the insert block (322) opposite to the upper housing (13) is inserted into the arc-shaped groove (1311) and cooperates with the arc-shaped groove (1311) to form a third circular hole (1312); a side of the first adjusting worm (1412) opposite to the hinge core (2) is rotatably arranged in the third circular hole (1312).

5. The door hinge according to claim 3, characterized in that, A rotation groove (323) is provided on one side of the support plate (32), the second adjustment mechanism (4) is rotationally arranged in the rotation groove (323), a bracket (324) is provided on the other side of the support plate (32), the third adjustment mechanism (5) is rotationally arranged on the bracket (324), a first circular hole (132) is provided on one side of the upper shell (13), a second circular hole (325) corresponding to the first circular hole (132) is provided on the support plate (32), the first adjustment portion (22) is rotationally matched with the first circular hole (132), and the second adjustment portion (23) is rotationally matched with the second circular hole (325).

6. The door hinge according to claim 1, characterized in that, A first gear ring (221) is fixedly arranged on the outer side of the first adjustment portion (22) along its circumferential direction; the third adjustment mechanism (5) meshes with the first gear ring (221) to drive the first gear ring (221) to rotate; a polygonal hole (222) is provided at one end of the first adjustment portion (22) away from the core portion (21); a first cylindrical hole (223) is provided at one end of the first adjustment portion (22) corresponding to the core portion (21); the core portion (21) is movably arranged in the first cylindrical hole (223); the polygonal hole (222) is connected to the first cylindrical hole (223); and the diameter of the first cylindrical hole (223) is greater than the width of the widest part of the polygonal hole (222).

7. The door hinge according to claim 6, characterized in that, A second gear ring (231) is fixedly arranged in a circumferential direction along the outside of the second adjusting part (23). The second adjusting mechanism (4) is engaged with the second gear ring (231) to drive the second gear ring (231) to rotate. A second cylindrical hole (232) is axially formed in the second adjusting part (23). Internal threads are arranged on the surface of the second cylindrical hole (232). External threads are arranged on the outside of the core part (21). The internal threads are in threaded connection with the external threads of the second cylindrical hole (232).

8. The door hinge according to claim 7, characterized in that, A third cylindrical hole (211) axially penetrates through the center of the core part (21). The first cylindrical hole (223), the second cylindrical hole (232) and the third cylindrical hole (211) are coaxially arranged. The second cylindrical hole (232) is in threaded cooperation with the core part to drive the core part (21) to move along the axial directions of the second cylindrical hole (232), the third cylindrical hole (211) and the second cylindrical hole (232). The diameter of the core part (21) is greater than the width of the widest part of the polygonal hole (222) and less than the diameter of the first cylindrical hole (223).

9. The door hinge according to claim 1, characterized in that, An installation part (142) is vertically and integrally arranged at the bottom of the lower housing (14). A threaded hole (1421) is formed in the installation part (142). The threaded hole (1421) is coaxially arranged with the hinge core (2).

Images