Three-section force optional stop delay buffer hinge

Abstract

This utility model discloses a three-stage force-controlled, time-delayed, buffer hinge, including a door leaf hinge and a door frame hinge. A spring sleeve is fixedly installed inside the door leaf hinge bushing, and a hydraulic cylinder sleeve is fixedly installed inside the door frame hinge bushing. A damping mechanism is installed inside the hydraulic cylinder sleeve. A closing spring is installed at one end of the spring sleeve, and a guide sleeve is fixedly installed at the other end. A pair of guide holes are longitudinally arranged on the side wall of the guide sleeve, and a pair of spiral grooves corresponding to the guide holes are arranged opposite each other on the side wall of the spring sleeve. A push rod is movably installed inside the guide sleeve, and a guide shaft on the push rod passes through the guide hole and is placed in the spiral groove. One end of the push rod abuts against the closing spring, and the other end extends into the hydraulic cylinder sleeve to cooperate with the damping mechanism. When the door leaf is rotated, the push rod moves away from the sliding member and compresses the closing spring. The one-way damper and the two-way damper of the damping mechanism cooperate to achieve delayed unlocking, allowing the door leaf to remain locked in the open state for a period of time, providing sufficient time for people to enter and exit.

Description

Technical Field

[0001] This utility model relates to the field of door and window installation accessories technology, and more specifically, it relates to a three-stage force-free stop delay buffer hinge. Background Technology

[0002] In some places, doors need to be kept closed. To ensure that the doors close automatically after being opened, door closers are usually installed on the door frame. A door closer is a hydraulic device similar to a spring. When the door is opened, it is compressed and then released to close the door automatically, acting like a spring door. This ensures that the door closes accurately and promptly to its initial position after being opened. However, when people open and release the door, the existing door closer will quickly push the door back to close it, affecting people's normal entry and exit, especially in frequently used places such as conference rooms and offices, and particularly affecting the normal entry and exit of special groups such as the elderly and children.

[0003] In addition, using door closers to achieve automatic door closing requires the addition of additional door and window installation accessories, increasing costs and affecting the appearance. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a three-stage force-free stop delay buffer hinge.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A three-stage force-free stop-delay buffer hinge includes a door leaf and a door frame leaf that are rotatably arranged; a spring sleeve is fixedly installed inside the bushing of the door leaf leaf, and a hydraulic cylinder sleeve is fixedly installed inside the bushing of the door frame leaf, with a damping mechanism installed inside the hydraulic cylinder sleeve;

[0007] A door closing spring is provided at one end of the spring sleeve, and a guide sleeve is fixedly provided at the other end. One end of the guide sleeve is fixed to the cylinder sleeve, and a pair of guide holes are longitudinally provided on the side wall of the other end. A pair of spiral grooves corresponding to the guide holes are provided on the side wall of the spring sleeve.

[0008] A push rod is movably disposed inside the guide sleeve. The guide shaft on the push rod passes through the guide hole and is placed in the spiral groove. One end of the push rod abuts against the door closing spring, and the other end extends into the cylinder sleeve to cooperate with the damping mechanism.

[0009] The damping mechanism includes a unidirectional damper and a bidirectional damper arranged opposite to each other, as well as a sliding element;

[0010] The first piston rod of the one-way damper is fitted with a first compression spring and connected to a linkage block, and the linkage block is inclinedly provided with a linkage groove.

[0011] One end of the second piston rod of the bidirectional damper is engaged with the linkage groove via a linkage shaft, and the other end is fitted with a second compression spring that drives the piston of the bidirectional damper to compress inward.

[0012] One end of the slider abuts against the push rod, and the other end abuts against the linkage block;

[0013] The rotating door leaf, the spiral groove drives the guide shaft to move the push rod away from the sliding member and compress the closing spring; the first compression spring drives the first piston rod to move the linkage block quickly toward the bidirectional damper, the linkage shaft slides along the linkage groove, driving the first piston rod to rotate and close the oil passage of the unidirectional damper; the second compression spring overcomes the resistance of the bidirectional damper and pushes the second piston rod to move slowly inward, so that the linkage shaft slides in the opposite direction along the linkage groove and drives the first piston rod to rotate in the opposite direction, reopening the oil passage of the unidirectional damper.

[0014] The present invention further includes: the unidirectional damper includes a housing, and the first piston rod is rotatably disposed in a sealed cavity of the housing, the sealed cavity being filled with damping oil;

[0015] The piston assembly at the end of the first piston rod divides the sealing cavity into an upper sealing cavity and a lower sealing cavity;

[0016] The piston assembly includes an upper piston and a lower piston that cooperate with each other. The upper piston is rotatably mounted on a first piston rod, and the lower piston is fixedly mounted on the first piston rod.

[0017] The oil passage includes an oil inlet on the lower piston and an oil outlet on the upper piston. When the first piston rod drives the lower piston to rotate, the oil outlet and the oil inlet are offset, thus closing the oil passage.

[0018] The present invention further comprises: an annular groove for installing a sealing ring is provided on the outer side wall of the upper piston, and the sealing ring is movably disposed in the annular groove; a plurality of upper oil passage grooves are provided on the end of the upper piston near the upper sealing ring, and a plurality of lower oil passage grooves are provided on the bottom wall of the annular groove.

[0019] The upper oil passage is connected to the upper sealing cavity, and the lower oil passage is connected to the lower sealing cavity;

[0020] The damping oil flows from the upper sealing cavity into the lower sealing cavity, causing the sealing ring to separate from the upper oil groove; thus connecting the upper oil groove with the annular groove.

[0021] The present invention is further provided in that a plurality of upper oil passages are provided in a one-to-one correspondence with a plurality of lower oil passages.

[0022] The present invention further includes an oil-excess notch on the bottom side wall of the outer casing.

[0023] The present invention further includes: a positioning component is provided between the spring sleeve and the cylinder sleeve. The positioning component includes a positioning disc spring and a positioning element. The lower end face of the positioning element abuts against the positioning disc spring, and four positioning protrusions are provided at intervals on its upper end face. The four positioning protrusions are evenly distributed on the upper end face of the positioning element.

[0024] The lower end face of the spring sleeve is provided with four positioning grooves that correspond one-to-one with the four positioning protrusions.

[0025] The positioning disc spring drives the four positioning protrusions of the positioning component to cooperate with the corresponding positioning grooves, positioning the door leaf in the closed or open position.

[0026] The present invention further includes: an adjusting nut is threadedly connected to the top of the spring sleeve, wherein the upper end of the closing spring abuts against the adjusting nut.

[0027] The present invention further includes a bearing provided between the door leaf sleeve and the door frame sleeve.

[0028] The beneficial effects of this utility model are as follows: When the door is opened, the door leaf drives the spring sleeve to rotate, which drives the push rod to move away from the sliding member and separates it from the sliding member, and compresses the closing spring;

[0029] After the push rod separates from the sliding member, the first piston rod, driven by the first compression spring, will cause the linkage block to move rapidly toward the bidirectional damper (because the first piston rod of the unidirectional damper has no damping when it extends outward), causing the linkage shaft on the end of the second piston rod to slide relative to the linkage groove, thereby forcing the first piston rod to rotate to close the oil passage of the unidirectional damper, preventing the damping oil in the upper and lower sealing chambers of the unidirectional damper from flowing, thereby locking the first piston rod and preventing the door leaf from rotating in the opposite direction to close the door;

[0030] During this process, the second compression spring overcomes the resistance of the bidirectional damper, pushing the second piston rod to move slowly inward. This causes the linkage shaft to slide in the opposite direction along the linkage groove, driving the first piston rod to rotate in the opposite direction, reopening the oil passage of the one-way damper, and releasing the lock on the first piston rod. The push rod, driven by the closing spring, moves towards the sliding member, pushing the first piston rod inward into the one-way damper and compressing the first compression spring. This causes the door leaf to rotate in the opposite direction, automatically closing the door. During this process, the first piston rod moves outward quickly and is quickly locked. After the second piston rod moves inward, the lock on the first piston rod is released. The time difference is the time it takes for the door to stop in the open position and delay closing. This hinge allows the door to remain open for a period of time after opening, giving people enough time to enter and exit. The door does not require a separate door closer, reducing the use of door installation accessories, saving installation costs, and making the door simpler and more aesthetically pleasing. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a three-stage force-free stop-delay buffer hinge according to the present invention;

[0032] Figure 2 This is an exploded view of a three-stage force-free stop delay buffer hinge according to the present invention;

[0033] Figure 3 This is a sectional view of the internal structure;

[0034] Figure 4 An exploded view of the internal structure;

[0035] Figure 5 This is a cross-sectional view of a unidirectional damper;

[0036] Figure 6 An exploded view of a unidirectional damper;

[0037] Figure 7 This is a schematic diagram of a bidirectional damper.

[0038] Figure 8 This is a cross-sectional view of a bidirectional damper;

[0039] Figure 9 This is a schematic diagram of the upper piston structure;

[0040] Figure 10 This is a schematic diagram of the linkage block;

[0041] Explanation of reference numerals in the attached drawings: 1. Door leaf; 11. Spring sleeve; 111. Spiral groove; 112. Positioning groove; 113. Adjusting nut; 12. Door closing spring; 13. Guide sleeve; 131. Guide hole; 132. Push rod; 1321. Guide shaft; 2. Door frame leaf; 21. Cylinder sleeve; 3. Damping mechanism; 31. One-way damper; 311. First piston rod; 312. First compression spring; 313. Linkage block; 3131. Linkage groove; 314. Outer shell; 3141. Oil passage notch; 31 5. Piston assembly; 3151, Upper piston; 31511, Oil outlet; 31512, Annular groove; 31513, Sealing ring; 31514, Upper oil groove; 31515, Lower oil groove; 3152, Lower piston; 31521, Oil inlet; 32, Bidirectional damper; 321, Second piston rod; 3211, Linkage shaft; 3212, Second compression spring; 33, Sliding component; 4. Positioning assembly; 41, Positioning disc spring; 42, Positioning component; 421, Positioning protrusion; 5. Bearing. Detailed Implementation

[0042] See attached document Figures 1 to 10This invention provides a more detailed description of a three-stage force-controlled, time-delayed, buffer hinge and a floor spring.

[0043] A three-stage force-free stop-delay buffer hinge includes a door leaf 1 and a door frame 2 that are rotatably arranged relative to each other, wherein a bearing 5 is provided between the bushing of the door leaf 1 and the bushing of the door frame 2;

[0044] A spring sleeve 11 is fixedly installed inside the bushing of the door leaf 1, and a hydraulic cylinder sleeve 21 is fixedly installed inside the bushing of the door frame 2, with a damping mechanism 3 installed inside the hydraulic cylinder sleeve 21.

[0045] A door closing spring 12 is provided at one end of the spring sleeve 11, and a guide sleeve 13 is fixedly provided at the other end. One end of the guide sleeve 13 is fixed to the cylinder sleeve 21, and a pair of guide holes 131 are longitudinally provided on the side wall of the other end. A pair of spiral grooves 111 corresponding to the guide holes 131 are provided on the side wall of the spring sleeve 11.

[0046] A push rod 132 is movably disposed inside the guide sleeve 13. The guide shaft 1321 on the push rod 132 passes through the guide hole 131 and is placed in the spiral groove 111. One end of the push rod 132 abuts against the door closing spring 12, and the other end extends into the cylinder sleeve 21 to cooperate with the damping mechanism 3.

[0047] The damping mechanism 3 includes a unidirectional damper 31 and a bidirectional damper 32 arranged opposite to each other, and a sliding member 33. The sliding member 33 is provided with a cavity for accommodating the bidirectional damper 32. The connecting shaft on the outer shell of the bidirectional damper 32 passes through the clearance hole on the side wall of the sliding member 33 and is fixed to the cylinder liner 21. The sliding member 33 can move back and forth relative to the bidirectional damper 32.

[0048] The first piston rod 311 of the one-way damper 31 is fitted with a first compression spring 312 and connected to a linkage block 313. The linkage block 313 is inclinedly provided with a linkage groove 3131.

[0049] One end of the second piston rod 321 of the bidirectional damper 32 is engaged with the linkage groove 3131 through the linkage shaft 3211, and the other end is fitted with a second compression spring 3212 that drives the piston of the bidirectional damper 32 to compress inward. The second compression spring 3212 is placed inside the bidirectional damper 32, with one end abutting against the piston and the other end abutting against the sealing ring 31513 at the rear end of the bidirectional damper 32, so that it has an inward pushing force on the piston.

[0050] One end of the sliding member 33 abuts against the push rod 132, and the other end abuts against the linkage block 313;

[0051] When the door is opened, the door leaf 1 drives the spring sleeve 11 to rotate, causing the push rod 132 to move away from the sliding member 33 and separate from the sliding member 33, and compress the closing spring 12.

[0052] After the push rod 132 separates from the sliding member 33, the first piston rod 311 will be driven by the first compression spring 312 to drive the linkage block 313 to move rapidly toward the bidirectional damper 32 (because the first piston rod 311 of the unidirectional damper 31 has no damping when it extends outward), so that the linkage shaft 3211 on the end of the second piston rod 321 slides relative to the linkage groove 3131, thereby forcing the first piston rod 311 to rotate to close the oil passage of the unidirectional damper 31, so that the damping oil in the upper and lower sealing chambers of the unidirectional damper 31 cannot flow, thereby locking the first piston rod 311 and preventing the door leaf 1 from rotating in the opposite direction to close the door;

[0053] During this process, the second compression spring 3212 overcomes the resistance of the bidirectional damper 32, pushing the second piston rod 321 to move slowly inward, causing the linkage shaft 3211 to slide in the opposite direction along the linkage groove 3131, driving the first piston rod 311 to rotate in the opposite direction, reopening the oil passage of the one-way damper 31, and releasing the lock on the first piston rod 311; the push rod 132 moves toward the sliding member 33 under the drive of the closing spring 12, pushing the first piston rod 311 inward into the one-way damper 31, and compressing the first compression spring 312; and causing the door leaf 1 to reverse. The hinge rotates to automatically close the door. During this process, the first piston rod 311 moves outward rapidly and is quickly locked. After the second piston rod 321 moves inward, the lock on the first piston rod 311 is released. The time difference is the time it takes for the door to stop in the open position and for the door to close after it has been open. This hinge allows the door to remain open for a period of time after it has been opened, giving people enough time to enter and exit. The door does not require a separate door closer, reducing the use of door installation accessories, saving installation costs, and making the door simpler and more aesthetically pleasing.

[0054] The unidirectional damper 31 includes a housing 314, and the first piston rod 311 is rotatably disposed in a sealed cavity of the housing 314, which is filled with damping oil; the piston assembly 315 at the end of the first piston rod 311 divides the sealed cavity into an upper sealed cavity and a lower sealed cavity.

[0055] The piston assembly 315 includes an upper piston 3151 and a lower piston 3152 that cooperate with each other. The upper piston 3151 is rotatably mounted on a first piston rod 311, and the lower piston 3152 is fixedly mounted on the first piston rod 311. The connecting end of the first piston rod 311 for mounting the piston assembly 315 is a flat shaft. The lower piston 3152 has a flat hole in the middle that matches the flat shaft, and the upper piston 3151 has a round hole in the middle. The lower piston 3152 and the upper piston 3151 are respectively fitted onto the flat shaft through the flat hole and the round hole. The sealing cavity of the cylinder liner 21 of the housing is non-circular. The outer contour of the lower piston 3152 is circular, and the outer contour of the upper piston 3151 is non-circular and matches the sealing cavity. This allows the lower piston 3152 to rotate with the first piston rod 311 when the piston rod is rotated, while the upper piston 3151 rotates relative to the lower piston 3152.

[0056] The oil passage includes an oil inlet 31521 on the lower piston 3152 and an oil outlet 31511 on the upper piston 3151. When the first piston rod 311 drives the lower piston 3152 to rotate, the oil outlet 31511 is offset from the oil inlet 31521, thus closing the oil passage. After the first piston rod 311 is rotated in the opposite direction, the oil outlet 31511 is positioned opposite to the oil inlet 31521, thus reopening the oil passage. This allows the damping oil in the lower sealing cavity to enter the upper sealing cavity through the oil passage after the first piston rod 311 is compressed inward.

[0057] The upper piston 3151 has an annular groove 31512 on its outer side wall for installing a sealing ring 31513, and the sealing ring 31513 is movably disposed in the annular groove 31512; the upper piston 3151 has a plurality of upper oil passage grooves 31514 at one end near the upper sealing ring 31513, and the bottom wall of the annular groove 31512 has a plurality of lower oil passage grooves 31515; wherein the plurality of upper oil passage grooves 31514 and the plurality of lower oil passage grooves 31515 are arranged in a one-to-one correspondence.

[0058] The upper oil passage 31514 is connected to the upper sealing cavity, and the lower oil passage 31515 is connected to the lower sealing cavity;

[0059] The damping oil flows from the upper sealing cavity into the lower sealing cavity, causing the sealing ring 31513 to separate from the upper oil groove 31514; this connects the upper oil groove 31514 with the annular groove 31512, allowing the damping oil in the upper sealing cavity to quickly pass through the upper oil groove 31514 and the lower oil groove 31515 into the lower sealing cavity; there is no damping effect.

[0060] When damping oil flows from the lower sealing cavity into the upper sealing cavity, it causes the sealing ring 31513 to adhere tightly to the lower opening of the upper oil passage groove 31514, blocking the upper oil passage groove 31514 from the annular groove 31512. This prevents the damping oil in the lower sealing cavity from entering the upper sealing cavity through the lower oil passage groove 31515 and the upper oil passage groove 31514, and it can only enter the upper sealing cavity through the oil passage hole, thus playing a damping role.

[0061] The bottom side wall of the outer casing 314 is provided with an oil passage 3141. When the door is closed, the first piston rod 311 drives the piston assembly 315 to move inward. When the door is closed to a certain angle, when the piston assembly 315 is opposite to the oil passage 3141, the damping oil in the upper sealing cavity can quickly enter the lower sealing cavity through the oil passage 3141, so that the one-way damper 31 loses its damping effect and the door can close quickly.

[0062] A positioning component 4 is provided between the spring sleeve 11 and the cylinder sleeve 21. The positioning component 4 includes a positioning disc spring 41 and a positioning member 42. The lower end face of the positioning member 42 abuts against the positioning disc spring 41, and four positioning protrusions 421 are provided at intervals on its upper end face. The four positioning protrusions 421 are evenly distributed on the upper end face of the positioning member 42.

[0063] The lower end face of the spring sleeve 11 is provided with four positioning grooves 112 that correspond one-to-one with the four positioning protrusions 421;

[0064] The positioning disc spring 41 drives the four positioning protrusions 421 of the positioning member 42 to cooperate with the corresponding positioning grooves 112, positioning the door leaf 1 in the closed or open position; preventing the door leaf from closing or opening by itself, thus playing a positioning role.

[0065] The top end of the spring sleeve 11 is threaded with an adjusting nut 113, and the upper end of the closing spring 12 abuts against the adjusting nut 113; by turning the adjusting nut 113, the preload of the closing spring 12 can be changed, thereby adjusting the closing speed of the door.

[0066] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A three-stage force-free stop-delay buffer hinge, comprising a door leaf hinge and a door frame hinge arranged in a relatively rotatable manner; characterized in that: A spring sleeve is fixedly installed inside the door leaf shaft sleeve, and a hydraulic cylinder sleeve is fixedly installed inside the door frame shaft sleeve. A damping mechanism is installed inside the hydraulic cylinder sleeve. A door closing spring is provided at one end of the spring sleeve, and a guide sleeve is provided at the other end. One end of the guide sleeve is fixed to the cylinder sleeve, and a pair of guide holes are longitudinally provided on the side wall of the other end. A pair of spiral grooves corresponding to the guide holes are provided on the side wall of the spring sleeve. A push rod is movably disposed inside the guide sleeve. The guide shaft on the push rod passes through the guide hole and is placed in the spiral groove. One end of the push rod abuts against the door closing spring, and the other end extends into the cylinder sleeve to cooperate with the damping mechanism. The damping mechanism includes a unidirectional damper and a bidirectional damper arranged opposite to each other, as well as a sliding element; The first piston rod of the one-way damper is fitted with a first compression spring and connected to a linkage block, and the linkage block is inclinedly provided with a linkage groove. One end of the second piston rod of the bidirectional damper is engaged with the linkage groove via a linkage shaft, and the other end is fitted with a second compression spring that drives the piston of the bidirectional damper to compress inward. One end of the slider abuts against the push rod, and the other end abuts against the linkage block; The rotating door leaf, the spiral groove drives the guide shaft to move the push rod away from the sliding member and compress the closing spring; the first compression spring drives the first piston rod to move the linkage block quickly toward the bidirectional damper, the linkage shaft slides along the linkage groove, driving the first piston rod to rotate and close the oil passage of the unidirectional damper; the second compression spring overcomes the resistance of the bidirectional damper and pushes the second piston rod to move slowly inward, so that the linkage shaft slides in the opposite direction along the linkage groove and drives the first piston rod to rotate in the opposite direction, reopening the oil passage of the unidirectional damper.

2. The three-stage force-arbitrary stop-delay buffer hinge according to claim 1, characterized in that: The unidirectional damper includes a housing, and the first piston rod is rotatably disposed in a sealed cavity of the housing, which is filled with damping oil. The piston assembly at the end of the first piston rod divides the sealing cavity into an upper sealing cavity and a lower sealing cavity; The piston assembly includes an upper piston and a lower piston that cooperate with each other. The upper piston is rotatably mounted on a first piston rod, and the lower piston is fixedly mounted on the first piston rod. The oil passage includes an oil inlet on the lower piston and an oil outlet on the upper piston. When the first piston rod drives the lower piston to rotate, the oil outlet and the oil inlet are offset, thus closing the oil passage.

3. A three-stage force-arbitrary stop-delay buffer hinge according to claim 2, characterized in that: The outer side wall of the upper piston is provided with an annular groove for installing a sealing ring, and the sealing ring is movably disposed in the annular groove; the end of the upper piston near the upper sealing ring is provided with a plurality of upper oil passage grooves, and the bottom wall of the annular groove is provided with a plurality of lower oil passage grooves. The upper oil passage is connected to the upper sealing cavity, and the lower oil passage is connected to the lower sealing cavity; The damping oil flows from the upper sealing cavity into the lower sealing cavity, causing the sealing ring to separate from the upper oil groove; thus connecting the upper oil groove with the annular groove.

4. A three-stage force-arbitrary stop-delay buffer hinge according to claim 3, characterized in that: Several upper oil tanks and several lower oil tanks are set up in a one-to-one correspondence.

5. A three-stage force-arbitrary stop-delay buffer hinge according to claim 4, characterized in that: An oil-extraction notch is provided on the bottom side wall of the outer casing.

6. A three-stage force-arbitrary stop-delay buffer hinge according to claim 1, 2, 3, 4, or 5, characterized in that: A positioning assembly is provided between the spring sleeve and the cylinder sleeve. The positioning assembly includes a positioning disc spring and a positioning element. The lower end face of the positioning element abuts against the positioning disc spring, and four positioning protrusions are provided at intervals on its upper end face. The four positioning protrusions are evenly distributed on the upper end face of the positioning element. The lower end face of the spring sleeve is provided with four positioning grooves that correspond one-to-one with the four positioning protrusions. The positioning disc spring drives the four positioning protrusions of the positioning component to cooperate with the corresponding positioning grooves, positioning the door leaf in the closed or open position.

7. A three-stage force-arbitrary stop-delay buffer hinge according to claim 6, characterized in that: The top end of the spring sleeve is threaded with an adjusting nut, wherein the upper end of the closing spring abuts against the adjusting nut.

8. A three-stage force-arbitrary stop-delay buffer hinge according to claim 7, characterized in that: A bearing is provided between the door leaf sleeve and the door frame sleeve.

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