Automatic closing door hinge

Abstract

The invention relates to the field of door hinges, in particular to a concealed installation automatic door closing hinge which comprises a fixed seat installed on a door frame, a movable seat installed on a door leaf and a hinge assembly. The fixed seat comprises a fixed seat outer seat and a fixed seat inner seat; the movable seat comprises a movable seat outer seat, and a movable seat fixing block, a movable sliding block and a buffer mechanism which are fixed in the movable seat outer seat, the buffer mechanism comprises a damping sleeve, a spring, and a damper, a hinge buckle, a damping shifting block and a damping bearing which are hinged in sequence, and a spring clamping block is arranged at one end of the damping sleeve; the damper is embedded in the damping sleeve, the middle of the damping shifting block, the middle of the damping bearing and the spring clamping block are hinged, and the damping sleeve is embedded in the middle of the spring. The hinge assembly comprises a center swing arm and a center swing arm rotating shaft.

Description

[0001] This invention is a divisional application of a Chinese patent application filed with the China Patent Office on November 5, 2020, with application number 202011219885.6 and titled “A concealed automatic door closing hinge”. Technical Field

[0002] The invention relates to the field of door hinges, in particular to a concealed automatic door closing hinge. Background Art

[0003] With the progress of society and scientific development, the technical level of our products is also constantly improving. There are new requirements for door hinges, and hinges with self-closing function have generated a large market demand. Door hinges with self-closing buffer function are mostly exposed hinges, which have the following disadvantages: they are not beautiful, and the exposed part of such hinges is easy to damage the overall effect of the door. Although the traditional concealed door hinge is installed in a hidden way, it cannot achieve the effect of automatic door closing. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects and provide a concealed automatic door closing hinge. When installed on the door, it can not only play the effect of concealed door hinge without being exposed, but also realize the function of automatic slow closing after opening the door. When the door opening angle is within the self-closing angle, the door can be automatically and slowly closed. The self-closing angle range can be any value between 5° and 180°. At the same time, the present invention also has the advantages of compact structure and quietness.

[0005] The technical solution adopted by the present invention is: a concealed automatic door closing hinge, comprising a fixed seat installed on the door frame, a movable seat installed on the door leaf, and a hinge assembly connecting the fixed seat and the movable seat, wherein the fixed seat comprises a fixed seat outer seat and a fixed seat inner seat, and a fixed seat inner seat groove is arranged inside the fixed seat outer seat; the movable seat comprises a movable seat outer seat, a movable seat fixing block, a movable slider and a buffer mechanism, and a movable slider groove is arranged inside the movable seat outer seat; slider moving pins and slider rolling surfaces are arranged on both sides of the movable slider; the buffer mechanism comprises a damping sleeve, a spring, a damper, a hinge buckle, a damping block and a damping bearing, a spring block is arranged at one end of the damping sleeve, and a damping sleeve is arranged in the middle The damper is embedded in a groove; the movable slider is embedded in the movable slider groove in the outer seat of the movable seat, and the movable slider can slide within the range of the movable slider groove; the buffer mechanism is fixed in the outer seat of the movable seat, and the damper is embedded in the damper embedding groove in the middle of the damping sleeve, and one end of the damper is hinged to one end of the hinge buckle; the other end of the hinge buckle is hinged to one end of the damping shift block; the middle part of the damping shift block is hinged to the spring block; the middle part of the damping bearing is hinged to the spring block, the damping bearing and the sliding block rolling surface abut, the damping sleeve is embedded in the middle part of the spring, and one end of the spring abuts against the spring block; the hinge assembly includes a central swing arm and a central swing arm rotating shaft, and the central swing arm rotating shaft passes through the other end of the central swing arm and is connected to the movable slider at both ends.

[0006] An adjusting screw hole is arranged inside the outer seat of the fixing seat, and adjusting screw holes are arranged at both ends of the inner seat of the fixing seat. An adjusting screw is arranged to be embedded in the adjusting screw hole and the adjusting screw hole to fix the inner seat of the fixing seat in the outer seat of the fixing seat.

[0007] The movable seat pin holes are arranged on both sides of the movable seat outer seat, the middle of the movable seat fixed block is embedded with a fixed block pin shaft, and the two ends of the fixed block pin shaft are embedded in the movable seat pin holes to fix the movable seat fixed block in the movable seat outer seat.

[0008] The buffer mechanism includes an adjustable block, and adjustable block holes are provided at both ends of the outer seat of the movable seat. The adjustable block is fixed in the adjustable block hole on the outer seat of the movable seat. The adjustable block is connected to the other end of the damping sleeve, and one end of the adjustable block is in contact with the spring. The prestress of the spring can be adjusted by adjusting the position of the adjustable block to adjust the tightness of the door opening and closing.

[0009] A damper retaining groove is arranged at one end of the damping sleeve, a damper pin hole is arranged at one end of the damper, and a damper pin shaft is arranged to be embedded in the damper retaining groove and the damper pin hole to fix the damper in the damping sleeve.

[0010] One end of the sliding surface of the slider is an inclined surface, and the other end is a straight surface.

[0011] Slider bearing grooves are provided on both sides of the movable slider groove, a slider center shaft is embedded in the middle of one end of the movable slider, slider bearings are provided at both ends of the slider center shaft, the slider bearings are embedded in the slider bearing grooves, and the slider bearings can slide within the range of the movable seat slider groove.

[0012] The hinge assembly includes a Y-shaped swing arm, a side swing arm, a fixed seat inner seat rotating shaft, a side swing arm rotating shaft, a Y-shaped swing arm rotating shaft, a center rotating shaft and a movable seat inner seat rotating shaft; the fixed seat inner seat rotating shaft passes through one end of the center rotating shaft, and both ends of the fixed seat inner seat rotating shaft are connected to the fixed seat inner seat; the side swing arm rotating shaft is fixed in the fixed seat inner seat, and both ends are connected to one end of the side swing arm; the Y-shaped swing arm rotating shaft passes through one end of the Y-shaped swing arm, and both ends are connected to the other end of the side swing arm; the center rotating shaft passes through the middle of the center swing arm, and both ends are connected to the Y-shaped swing arm; the movable seat inner seat rotating shaft passes through the other end of the Y-shaped swing arm, and both ends are connected to the movable seat fixed block.

[0013] A moving seat spring embedding groove is arranged inside the moving seat outer seat, and a fixed block spring embedding groove is arranged on one side of the moving seat fixed block. One side of the spring is embedded in the moving seat spring embedding groove, and the other side is embedded in the fixed block spring embedding groove.

[0014] One end of the damping paddle block is provided with a paddle groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the fixing seat of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the mobile seat of the present invention;

[0018] Figure 4 This is a front structural schematic diagram of the hinge assembly of the present invention;

[0019] Figure 5 It is a schematic diagram of the side structure of the hinge assembly of the present invention;

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the present invention in an open door state;

[0021] Figure 7 It is a schematic diagram of the cross-sectional structure of the closed door state of the present invention.

[0022] The numbers in the figure show:

[0023] 1. Fixed seat, 11. Fixed seat outer seat, 111. Fixed seat inner seat groove, 112. Adjusting screw hole, 12. Fixed seat inner seat, 121. Adjusting screw screw hole, 13. Adjusting screw;

[0024] 2. Mobile seat;

[0025] 21. outer seat of the moving seat, 211. slot of the moving slider, 2111. sliding slot of the slider bearing, 212. spring slot of the moving seat, 213. pin hole of the moving seat, 214. hole of the adjustable stopper;

[0026] 22. Moving seat fixing block, 221. Fixing block spring embedding groove, 222. Fixing block pin shaft;

[0027] 23. Moving slider, 231. Center rotating shaft of slider, 232. Moving pin of slider, 233. Bearing of slider, 234. Rolling surface of slider;

[0028] 24. Buffer mechanism, 241. Damping sleeve, 2411. Damping retaining groove, 2412. Spring clamp, 2413. Damping groove, 242. Spring, 243. Damping, 2431. Damping pin hole, 2432. Damping pin shaft, 244. Articulated buckle, 245. Damping block, 2451. Dial groove, 246. Damping bearing, 247. Adjustable block;

[0029] 3. Hinge assembly, 31. Y-type swing arm, 32. Center swing arm, 33. Side swing arm, 34. Fixed seat inner seat rotation shaft, 35. Side swing arm rotation shaft, 36. Y-type swing arm rotation shaft, 37. Center rotation shaft, 38. Center swing arm rotation shaft, 39. Mobile seat inner seat rotation shaft. DETAILED DESCRIPTION

[0030] A concealed automatic door closing hinge comprises a fixed seat 1 installed on a door frame, a movable seat 2 installed on a door leaf, and a hinge assembly 3 connecting the fixed seat 1 and the movable seat 2.

[0031] The fixing seat 1 includes a fixing seat outer seat 11, a fixing seat inner seat 12 and an adjusting screw 13. The fixing seat outer seat 11 is provided with a fixing seat inner seat groove 111 and an adjusting screw hole 112, and the fixing seat inner seat 12 is provided with adjusting screw holes 121 at both ends; the fixing seat inner seat 12 is fixed in the fixing seat inner seat groove 111, and the adjusting screw 13 is embedded in the adjusting screw hole 121 and the adjusting screw hole 112 to fix the fixing seat inner seat 12 in the fixing seat outer seat 11.

[0032] The movable seat comprises a movable seat outer seat 21, a movable seat fixed block 22, a movable slider 23 and a buffer mechanism 24. A movable slider groove 211 is provided in the middle of the inner part of the movable seat outer seat 21, and a movable seat spring groove 212 is provided on both sides of the inner part. Slider bearing grooves 2111 are provided on both sides of the movable slider groove 211. A movable seat pin hole 213 is provided on both sides of the movable seat outer seat 21, and adjustable stopper holes 214 are provided at both ends of the movable seat outer seat 21. A fixed block spring groove 221 is provided on one side of the movable seat fixed block 22, and a fixed block pin shaft 222 is embedded in the middle of the movable seat fixed block 22. A slider center shaft 231 is embedded in the middle of one end of the movable slider 23, and slider bearings 233 are provided at both ends of the slider center shaft 231. A slider toggle pin shaft 232 and a slider rolling surface 234 are embedded on both sides of the movable slider 23, and one end of the slider rolling surface 324 is an inclined surface and the other end is a straight surface. The buffer mechanism 24 includes a damping sleeve 241, a spring 242, a damper 243, a hinge buckle 244, a damping shift block 245, a damping bearing 246 and an adjustable stopper 247. A damping sleeve 241 is provided with a damper stop groove 2411 at one end and a spring block 2412 at the other end. A damper embedding groove 2413 is provided in the middle of the damping sleeve 241. A damper pin hole 2431 is provided at one end of the damper 243; and a shift groove 2451 is provided at one end of the damping shift block 245.

[0033] Both ends of the fixed block pin shaft 222 are embedded in the movable seat pin hole 213 to fix the movable seat fixed block 22 in the movable seat outer seat 21; the movable slider 23 is embedded in the movable slider groove 211 in the movable seat outer seat 21, and the slider bearing 233 is embedded in the slider bearing groove 2111. The slider bearing 233 can slide within the range of the slider bearing groove 2111, driving the movable slider 23 to slide in the movable slider groove 211.

[0034] The buffer mechanism 224 is fixed in the outer seat 21 of the moving seat, one side of the spring 242 is embedded in the spring groove 212 of the moving seat, and the other side is embedded in the spring groove 221 of the fixed block; the damper 243 is embedded in the damper groove 2413 in the middle of the damping sleeve 241, and a damper pin shaft 2432 is embedded in the damper retaining groove 2411 and the damper pin hole 2431 to fix the damper 243 in the damping sleeve 241, and the other end of the damper 243 is hinged to one end of the hinge buckle 244; the other end of the hinge buckle 244 is hinged to the damper One end of the shift block 245 is hinged; the middle part of the damping shift block 245 is hinged to the spring block 2412; the middle part of the damping bearing 246 is hinged to the spring block 2412, and the damping bearing 246 abuts against the rolling surface 234 of the slider; the adjustable stopper 247 is rotatably arranged in the adjustable stopper hole 214 on the outer seat 21 of the movable seat, and the adjustable stopper 247 is connected to the other end of the damping sleeve 241; the damping sleeve 241 is embedded in the middle part of the spring 242, and one end of the spring 242 abuts against the spring block 2412, and the other end abuts against the adjustable stopper 247.

[0035] The hinge assembly 3 includes a Y-shaped swing arm 31, a central swing arm 32, a side swing arm 33, a fixed seat inner seat rotation shaft 34, a side swing arm rotation shaft 35, a Y-shaped swing arm rotation shaft 36, a central rotation shaft 37, a central swing arm rotation shaft 38 and a movable seat inner seat rotation shaft 39. The fixed seat inner seat rotating shaft 34 passes through one end of the central swing arm 32, and the two ends of the fixed seat inner seat rotating shaft 34 are connected to the fixed seat inner seat 12; the side swing arm rotating shaft 35 is fixed in the fixed seat inner seat 12, and its two ends are connected to one end of the side swing arm 33; the Y-shaped swing arm 36 rotating shaft passes through one end of the Y-shaped swing arm 31, and its two ends are connected to the other end of the side swing arm 33; the central rotating shaft 37 passes through the middle of the central swing arm 32, and its two ends are connected to the Y-shaped swing arm 36; the central swing arm rotating shaft 38 passes through the other end of the central swing arm 32, and its two ends are connected to the movable slider 23; the movable seat inner seat rotating shaft 39 passes through the other end of the Y-shaped swing arm 31, and its two ends are connected to the movable seat fixed block 22.

[0036] When the door leaf is in an open state, the damping bearing and the rolling surface of the slider are in direct contact with each other, and the spring is in a compressed state.

[0037] When closing the door, as the door leaf moves, the hinge assembly drives the moving slider to slide toward the inside of the outer seat of the moving seat, and the damping bearing rolls along the slider rolling surface of the moving slider from the straight surface to the inclined surface. When the damping bearing rolls to the inclined surface, under the action of the spring force, the damping bearing exerts a component force on the moving slider toward the inside of the outer seat of the moving seat, and the moving slider is forced to continue to slide toward the inside of the outer seat of the moving seat, and the hinge begins to close automatically. The moving slider continues to slide until the slider push pin on the moving slider is embedded in the push groove on the damping push block, and the slider push pin drives the damping push block to rotate toward the inside of the outer seat of the moving seat, stretching and triggering the damper. Under the action of the damping force, the sliding speed of the moving slider toward the inside of the outer seat of the moving seat slows down, and the door slowly closes.

[0038] When opening the door, as the door leaf moves, the hinge assembly drives the moving slider to slide toward the outside of the outer seat of the moving seat, and the damping bearing rolls along the slider rolling surface of the moving slider from the inclined surface to the straight surface. The spring is forced to compress and store energy, and the slider toggle pin drives the damping block to rotate toward the outside of the outer seat of the moving seat. The damper is compressed until the slider toggle pin is disengaged from the toggle groove on the damping block. The door continues to open, and the spring continues to be compressed until the damping bearing rolls to the straight surface of the moving slider. The spring energy storage ends and the door can continue to open to 108°. During the process of spring energy storage, the door will automatically close if the external force of opening the door is removed at any angle. Adjusting the position of the adjustable block can adjust the tightness of the door opening and closing, thereby improving the feel of opening the door.

Claims

1. An automatic closing door hinge, comprising a fixed seat, a movable seat, and a hinge assembly connecting the fixed seat and the movable seat, characterized in that: The mobile seat comprises: The outer seat of the movable seat has a movable slider groove inside; A movable slider is slidably arranged in the movable slider groove, and a slider rolling surface is formed on the side surface, wherein one end of the slider rolling surface is an inclined surface and the other end is a straight surface; A spring block is slidably arranged in the outer seat of the moving seat, and one side of the spring block is rotatably provided with a damping bearing against the rolling surface of the slider; A spring, arranged in the outer seat of the moving seat, one end of which is connected to the other side of the spring clamping block, and applies a force toward one side of the moving slider to the spring clamping block; Among them, a swing arm at one end of the hinge assembly is rotatably connected to the movable slider, and the other end is connected to the fixed seat; when the door hinge is in an open state, the damping bearing abuts against the straight surface area of ​​the slider rolling surface, and when the door hinge gradually closes, the movable slider slides into the outer seat of the movable seat, and the damping bearing gradually abuts against the inclined surface area of ​​the slider rolling surface.

2. The automatic closing door hinge according to claim 1, characterized in that: Slider bearing sliding grooves are provided on both sides of the movable slider groove; A slider center rotating shaft is embedded in the middle of the movable slider, a slider bearing is rotatably arranged on the slider center rotating shaft, and the slider bearing is slidably arranged in the slider bearing sliding groove.

3. The automatic closing door hinge according to claim 1, characterized in that: The mobile seat also includes: The movable seat fixing block is fixed on the outer seat of the movable seat; wherein Another swing arm at one end of the hinge assembly is rotatably connected to the moving seat fixing block.

4. The automatic closing door hinge according to claim 3, characterized in that: The hinge assembly comprises: A Y-shaped swing arm, one end of which is rotatably connected to the fixed block of the moving seat; A side swing arm, one end of which is rotatably connected to the other end of the Y-shaped swing arm, and the other end of which is rotatably connected to the fixing seat; The central swing arm has one end rotatably connected to the movable slider, the other end rotatably connected to the fixed seat, and the middle is rotatably connected to the middle part of the Y-shaped swing arm.

5. The automatic closing door hinge according to claim 3, characterized in that: A fixing block spring groove is provided on one side of the moving seat fixing block; The outer seat of the movable seat is provided with a movable seat spring embedding groove opposite to the fixed block spring embedding groove; One side of the spring is embedded in the spring embedding groove of the movable seat, and the other side of the spring is embedded in the spring embedding groove of the fixed block.

6. The automatic closing door hinge according to claim 5, characterized in that: Two movable seat fixing blocks are fixedly arranged on the movable seat outer seat, two movable seat spring embedding grooves are arranged in the movable seat outer seat, two springs are arranged in the movable seat outer seat, and the slider rolling surfaces are formed on both sides of the movable slider.

7. The automatic closing door hinge according to any one of claims 1 to 6, characterized in that: The mobile seat also includes: A damper is arranged inside the outer seat of the movable seat; A hinged buckle, one end of which is hinged to one end of the damper; The damping pull block is rotatably arranged in the middle on the spring clamp block, one end of which is hinged to the other end of the hinge buckle, and the other end of which is provided with a V-shaped pull groove; The movable slider is provided with a slider toggle pin, and when the movable slider slides toward the inner side of the outer seat of the movable seat, the slider toggle pin is embedded in the toggle groove, and the slider toggle pin abuts against one side wall of the toggle groove and drives the damping toggle block to rotate, stretches and triggers the damper. Under the action of the damping force, the sliding speed of the movable slider toward the inner side of the outer seat of the movable seat is slowed down; when the movable slider slides toward the outer side of the outer seat of the movable seat, the slider toggle pin abuts against the other side wall of the toggle groove and drives the damping toggle block to rotate, compresses and triggers the damper. Under the action of the damping force, the sliding speed of the movable slider toward the outer side of the outer seat of the movable seat is slowed down.

8. The automatic closing door hinge according to claim 7, characterized in that: The mobile seat also includes: The damping sleeve is fixedly mounted on the damper and slidably disposed in the outer seat of the movable seat; wherein The spring block is fixedly arranged at one end of the damping sleeve close to the moving slider.

9. The automatic closing door hinge according to claim 8, characterized in that: The spring is sleeved on the damping sleeve.

10. The automatic closing door hinge according to claim 9, characterized in that: Adjustable stopper holes are arranged at two ends of the outer seat of the movable seat, an adjustable stopper is rotatably arranged in the adjustable stopper hole, and the other end of the spring is connected to the adjustable stopper.

11. The automatic closing door hinge according to claim 1, characterized in that: The fixing seat comprises: The fixed seat outer seat has a fixed seat inner seat groove and an adjusting screw hole inside; The inner seat of the fixed seat has adjusting screw holes at both ends; The adjusting screw is embedded in the adjusting screw screw hole and the adjusting screw hole to fix the inner seat of the fixing seat in the outer seat of the fixing seat.

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