Automatic door closing damping hinge

Abstract

The utility model relates to an automatic door closing damping hinge. A shaft core of the automatic door closing damping hinge comprises a left sleeve, a right sleeve, a spring, a rotating shaft, a pin rod and a damper. The front side and the rear side of the sleeve wall of the left sleeve are respectively provided with an arc-shaped opening chute which inclines along the axial direction; the left sleeve is sleeved with a hinge ring which is inserted into the left hinge plate in a close fit manner; spiral grooves which spirally ascend in the axial direction are formed in the left side and the right side of the sleeve wall of the right sleeve respectively, the rotating shaft is sleeved with the right sleeve, and the pin rod transversely penetrates through the rotating shaft; the right sleeve is inserted into the left sleeve and the hinge ring of the right hinge plate, and the right sleeve and the hinge ring of the right hinge plate are tightly matched and sleeved; the spring and the damper are movably sleeved with the right sleeve, adjusting bolts are installed at the two sleeve ends of the right sleeve, the spring and the damper abut against the upper end and the lower end of the rotating shaft, and the door closing elastic force is adjusted through the adjusting bolts; when the hinge rotates, the two ends of the pin rod slide in the spiral groove and the inclined groove at the same time so that the hinge can open and close the door. The device has the advantages of simple structure, convenience in installation and uniform stress.

Description

Technical Field

[0001] This utility model relates to an automatic door closing damping hinge. Background Technology

[0002] Chinese Patent Publication No. CN215859621U discloses a durable hydraulic buffer hinge. This patent achieves an opening of over 180 degrees by creating a spiral groove on the piston chamber wall and a 20-degree spiral rotation groove on the sleeve, making the hydraulic buffer hinge more practical. However, all the load-bearing force for the hinge rotation is distributed among the internal components of the shaft core. Furthermore, the numerous components and complex structure make it not only difficult to install but also prone to damage. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in existing damping hinges by providing an automatic door closing damping hinge that is simple in structure, easy to install, and provides uniform force distribution.

[0004] The purpose of this utility model is achieved as follows: An automatic door closing damping hinge includes a left leaf plate, a right leaf plate, and a shaft core; the shaft core includes a left sleeve, a right sleeve, a spring, a rotating shaft, a pin, and a damper; each of the front and rear sides of the left sleeve wall has an axially inclined arc-shaped opening groove, and the left sleeve is tightly fitted into the hinge ring of the left leaf plate; each of the left and right sides of the right sleeve wall has an axially spiraling groove, the rotating shaft is fitted into the right sleeve, and the pin passes laterally through the rotating shaft, with both ends of the pin slidingly engaged with the spiral groove. The right sleeve is inserted into the hinge ring of the left sleeve and the right leaf plate. The right sleeve and the hinge ring of the right leaf plate are tightly fitted together. The two ends of the pin are slidably fitted into the inclined groove. The spring and damper are movably fitted into the right sleeve. Adjusting bolts are installed at the two ends of the right sleeve so that the spring and damper abut against the upper and lower ends of the rotating shaft. The closing spring force is adjusted by adjusting the bolts. When the hinge rotates, the left leaf plate rotates with the left sleeve, and the right leaf plate rotates with the right sleeve. The two ends of the pin slide simultaneously in the spiral groove and the inclined groove, so that the hinge opens and closes the door.

[0005] In this utility model, the right page plate has two hinge rings, one upper and one lower, and the right sleeve is formed by the upper right sleeve and the lower right sleeve being tightly fitted together or / and welded together.

[0006] In this invention, the inclined groove allows the left page plate to rotate 25-35 degrees with the left sleeve, and the spiral groove allows the right page plate to rotate 145-155 degrees with the right sleeve.

[0007] In this invention, a bearing is provided between the hinge ring of the left page plate and the hinge ring of the right page plate. The bearing is preferably a ball bearing, but a circular washer can also be used as a bearing.

[0008] The damper of this utility model is an integrated hydraulic damper, which is a commercially available product and is easy to install.

[0009] In this invention, dust covers are fastened to both ends of the right sleeve to prevent dust.

[0010] In this invention, circular washers are provided at both ends of the spring to abut against the ends of the adjusting bolt and the rotating shaft. By using the circular washers to hold the spring in place, the force on the spring can be more evenly distributed.

[0011] This invention abandons the spiral groove on the piston of existing damping hinges and adopts a structure with inclined grooves and spiral grooves on the left and right sleeves respectively. This makes the rotational load of the shaft core distributed to the left and right sleeves, resulting in more balanced force. Moreover, the structure is simpler than the previous structure, thus making the assembly and installation of the hinge of this invention more convenient.

[0012] This invention replaces the original straight groove on the left sleeve with a 30±5° arc-shaped inclined groove, which reduces the machining angle of the original spindle spiral groove from 180° to 150±5°. This reduces the rotational lifting distance of the shaft from 11-14mm to about 8mm, which helps to improve the strength of the shaft and shorten the spring stroke, thereby reducing the spring pressure and extending the spring life. The reduced rotational lifting distance of the shaft also allows for a shorter length of the damper and spring, which is beneficial for the subsequent miniaturization of the hinge.

[0013] This invention significantly reduces the torque required to open and close the door by rotating the inclined groove and spiral groove synchronously. This makes it easier for the screws on the door leaf and doorpost to be fixed and prevents them from loosening, thus extending the service life and making the automatic closing process smoother.

[0014] This invention can achieve positioning at 90°-170°, automatically close the door at 85°, and achieve silent closing or locking by buffer damping at 15°-5°. The closing speed, buffering and locking speed are adjustable.

[0015] The following embodiments, in conjunction with the accompanying drawings, further illustrate the present invention. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A perspective view of the three-dimensional structure of the shaft core after separating the left and right pages in the embodiment;

[0018] Figure 3 yes Figure 1 A schematic diagram of the component three-dimensional structure of the embodiment.

[0019] In the diagram, 1. Left page plate; 2. Right page plate; 3. Left sleeve; 4. Upper right sleeve; 5. Spring; 6. Shaft; 7. Pin; 8. Damper; 9. Inclined groove; 10. Spiral groove; 11. Lower right sleeve; 12. Adjusting bolt; 13. Bearing; 14. Dust cover; 15. Circular gasket. Detailed Implementation

[0020] Reference Figures 1 to 3 This embodiment is an automatic closing damping hinge, including a left leaf plate 1, a right leaf plate 2, and a shaft core. The shaft core includes a left sleeve 3, a right sleeve, a spring 5, a rotating shaft 6, a pin 7, and an integrated hydraulic damper 8. An axially inclined arc-shaped groove 9 is provided on the front and rear sides of the left sleeve wall. The left sleeve is tightly fitted into the hinge ring of the left leaf plate, and the groove allows the left leaf plate to rotate with the left sleeve. The right sleeve is formed by a tight fit between an upper right sleeve 4 and a lower right sleeve 11. An axially spiral groove 10 is provided on the left and right sides of the upper right sleeve wall. The rotating shaft is fitted into the upper right sleeve, and the pin passes laterally through the rotating shaft. The two ends of the pin slide in the spiral groove, allowing the right leaf plate to rotate with the right sleeve. The hinge rotates; the upper right sleeve is inserted into the hinge ring of the left sleeve and the right leaf plate, and the upper right sleeve and the hinge ring of the right leaf plate are tightly fitted together. The two ends of the pin are slidably fitted with the inclined groove; the lower right sleeve is fitted into the hinge ring of the right leaf plate, and the lower right sleeve and the upper right sleeve are tightly fitted together and welded together; the spring and damper are respectively movably fitted into the upper right sleeve and the lower right sleeve, and the adjusting bolt 12 is installed on the outer end of the upper right sleeve and the lower right sleeve so that the spring and damper abut against the upper and lower ends of the rotating shaft. The closing spring force is adjusted by adjusting the adjusting bolt; when the hinge rotates, the left leaf plate rotates synchronously with the left sleeve, and the right leaf plate rotates synchronously with the upper right sleeve and the lower right sleeve. The two ends of the pin slide simultaneously in the spiral groove and the inclined groove to open and close the hinge.

[0021] In this invention, a bearing 13 is provided between the hinge rings of the left and right pages. The bearing is a ball bearing. Dust covers 14 can be fastened to both ends of the right sleeve to prevent dust. Circular washers 15 are provided at both ends of the spring to abut against the ends of the adjusting bolts and the rotating shaft. By using the circular washers to hold the spring in place, the force on the spring can be more evenly distributed.

[0022] In this invention, the optimal design for the spiral groove is to allow the right leaf plate to rotate up to 155 degrees with the right sleeve. Specifically, the spiral groove on the right sleeve is machined to rotate 145-155 degrees around the sleeve wall, ensuring sufficient strength for the right sleeve. The inclined groove on the left sleeve is machined to rotate up to 35 degrees around the sleeve wall. When the combined rotation of both is less than 180 degrees, the door can be prevented from hitting the wall.

[0023] Assembly process of this utility model embodiment: 1. Insert the left sleeve into the hinge ring of the left page plate for a tight fit; 2. Insert the rotating shaft into the upper right sleeve, with the pin passing laterally through the rotating shaft, so that both ends of the pin slide into the spiral groove of the upper right sleeve; 3. Place a bearing between the hinge rings of the left and right page plates, with the hinge rings and bearings of the left and right page plates coaxial; 4. Insert the upper right sleeve into the hinge rings of the left sleeve and the right page plate, with the upper right sleeve and the right page plate... 5. Insert the lower right sleeve into the hinge ring of the right page plate, and fit the lower right sleeve tightly with the upper right sleeve and weld them together; 6. Move the spring and damper into the upper right sleeve and lower right sleeve respectively, and install adjusting bolts on the outer ends of the upper right sleeve and lower right sleeve so that the spring and damper abut against the upper and lower ends of the rotating shaft. Adjust the closing force by adjusting the adjusting bolts; 7. Fasten dust covers on the outer ends of the upper right sleeve and lower right sleeve.

[0024] In this utility model, the names and definitions of the left page plate, right page plate, left sleeve, and right sleeve are defined. The left sleeve has an axially inclined arc-shaped opening groove on each of its front and rear sides, and the right sleeve has an axially spiral groove on each of its left and right sides. The definitions and positional limitations of the components are only for the purpose of making the technical solution of this utility model easier to understand. The component names, front and rear positions, and left and right positions can change when the observation angle changes, and do not limit this utility model.

Claims

1. An automatic door-closing damping hinge, comprising a left leaf plate (1), a right leaf plate (2), and a shaft core; characterized in that: The shaft core includes a left sleeve (3), a right sleeve, a spring (5), a rotating shaft (6), a pin (7), and a damper (8); the left sleeve has an axially inclined arc-shaped groove (9) on each of its front and rear sides, and the left sleeve is tightly fitted into the hinge ring of the left leaf plate; the right sleeve has an axially spiral groove (10) on each of its left and right sides, and the rotating shaft is fitted into the right sleeve, the pin passes laterally through the rotating shaft, and the two ends of the pin slide into the spiral groove; the right sleeve is inserted into Inside the hinge ring of the left sleeve and the right leaf plate, the right sleeve and the hinge ring of the right leaf plate are tightly fitted together, and the two ends of the pin are slidably fitted with the inclined groove; the spring and damper are movably fitted in the right sleeve, and adjusting bolts (12) are installed at the two ends of the right sleeve so that the spring and damper abut against the upper and lower ends of the rotating shaft, and the closing force is adjusted by adjusting the adjusting bolts; when the hinge rotates, the left leaf plate rotates with the left sleeve, and the right leaf plate rotates with the right sleeve, and the two ends of the pin slide in the spiral groove and the inclined groove at the same time to open and close the hinge.

2. The automatic closing damping hinge according to claim 1, characterized in that: The right page plate has two hinge rings, one upper and one lower. The right sleeve is formed by the upper right sleeve (4) and the lower right sleeve (11) being tightly fitted together or / and welded together.

3. The automatic closing damping hinge according to claim 1, characterized in that: The inclined groove allows the left leaf plate to rotate 25-35 degrees with the left sleeve, and the spiral groove allows the right leaf plate to rotate 145-155 degrees with the right sleeve.

4. The automatic closing damping hinge according to claim 1, characterized in that: A bearing (13) is provided between the hinge ring of the left page plate and the hinge ring of the right page plate, and the bearing is provided with balls.

5. The automatic closing damping hinge according to claim 1, characterized in that: The damper is an integrated hydraulic damper.

6. The automatic closing damping hinge according to claim 1, characterized in that: Dust covers (14) are fastened to both ends of the right sleeve.

7. The automatic closing damping hinge according to claim 1, characterized in that: Circular washers (15) are provided at both ends of the spring to abut against the ends of the adjusting bolt and the rotating shaft.

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