Buffer hinge

Abstract

The utility model discloses a buffering hinge which comprises a transmission mechanism, the transmission mechanism comprises a rotating block and a sliding block, the rotating block is coaxially arranged on a first barrel, the sliding block can slide in the axial direction of a second barrel, an abutting part and a chute for transmission are arranged between the rotating block and the sliding block, the tail end of the chute is connected with at least one positioning groove, and the positioning groove is arranged in the first barrel. The at least one positioning groove is used for accommodating the abutting part so as to prevent the rotating block from rotating; the spring is arranged in the second barrel, is located on the side, away from the rotating block, of the sliding block and is used for driving the sliding block to slide in the direction close to the rotating block; the hydraulic damper can stretch out and draw back in the sliding direction of the sliding block and is used for preventing the sliding block from sliding in the direction close to the rotating block. The hinge can effectively position the door leaf, the service life of the hinge is prolonged, and noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a buffer hinge. Background Art

[0002] Hinges are often used as the hinge structure of building doors and windows. To meet the usage requirements, some hinges are provided with functions of automatically closing and buffering and door stopping.

[0003] In particular, some buffer hinges can achieve the function of door stopping in the following ways. First, the buffer hinge and the door stopper are used in combination. The door stopper is installed on the ground or the wall. When the door leaf is opened, the door stopper fixes the door leaf at a certain position. Second, a door stopping structure is arranged inside the buffer hinge. When the door leaf is opened, the door can be stopped arbitrarily within a certain angle range.

[0004] However, the above two door stopping methods have some disadvantages as follows:

[0005] 1. The door stopper fittings increase the manufacturing cost of the hinge, and moreover, they also increase the installation process of the door stopper.

[0006] 2. When the door leaf and the door stopper are positioned in cooperation, they come into contact with each other, generating relatively large noise.

[0007] 3. The existing door stopping structure cannot truly achieve the door stopping function. When the door is stopped, a strong wind is likely to move the door leaf, causing the door stopping function to fail. Content of the Utility Model

[0008] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a buffer hinge, which can effectively position the door leaf, improve the service life of the hinge and reduce noise.

[0009] A buffer hinge according to an embodiment of the first aspect of the utility model includes a shaft core, a first leaf and a second leaf that rotate coaxially. The first leaf and the second leaf rotate around the shaft core. The shaft core includes a first cylinder and a second cylinder that rotate coaxially. It is characterized in that it includes: a transmission mechanism, the transmission mechanism includes a rotating block and a sliding block. The rotating block is coaxially arranged on the first cylinder. The sliding block is slidably arranged along the axial direction of the second cylinder. A contact part and an inclined channel for transmission are arranged between the rotating block and the sliding block. At least one positioning groove is connected to the end of the inclined channel. At least one of the positioning grooves is used to accommodate the contact part to prevent the rotating block from rotating; a spring, the spring is arranged inside the second cylinder and is located on the side of the sliding block away from the rotating block, and is used to drive the sliding block to slide along the direction close to the rotating block; a hydraulic damper, the hydraulic damper can expand and contract along the sliding direction of the sliding block, and is used to prevent the sliding block from sliding along the direction close to the rotating block.

[0010] A buffer hinge according to an embodiment of the present invention has at least the following beneficial effects:

[0011] 1. By providing a rotating block and a sliding block in the present invention, during the rotation of the rotating block, the abutting portion and the inclined path cooperate to drive, so that the sliding block slides along the axial direction of the second cylinder. The rotating block and the sliding block are not easily broken or damaged, which is beneficial to improving the service life of the transmission mechanism.

[0012] 2. In the present invention, at least one positioning groove is connected to the end of the inclined path. When the door leaf is opened to a certain angle, the abutting portion cooperates with the positioning groove, that is, the abutting portion enters the positioning groove, so that the abutting portion is positioned in the positioning groove, and the rotating block is difficult to rotate. Thus, the positioning of the door leaf is realized without using the traditional method of installing a door stopper on the ground to position the door leaf, avoiding the noise generated by the collision between the door stopper and the door leaf. Moreover, the true meaning of door stopping and positioning can be achieved, and the door leaf is not easily rotated even under the blowing of strong wind, meeting the requirements of door leaf positioning.

[0013] 3. By providing a spring in the present invention, during the closing process of the door leaf, the compressed spring can drive the sliding block to slide, and under the cooperation of the abutting portion and the inclined path, the rotating block rotates, so that the door leaf is automatically closed, meeting the use requirements.

[0014] 4. By providing a hydraulic damper in the present invention, during the closing process of the door leaf, the hydraulic damper is always in contact with the sliding block. The hydraulic damper can slow down the moving speed of the sliding block, that is, slow down the rotating speed of the rotating block. Thus, the function of slowly closing the door leaf is realized, and there is no collision between the hydraulic damper and the sliding block, which also greatly reduces the noise of the hinge when closing the door. Moreover, the hydraulic damper is an integral structure, without the need to separately set a damping structure inside the hinge, nor the need to inject damping oil, which greatly facilitates the assembly and manufacturing of the hinge and reduces the manufacturing cost.

[0015] According to some embodiments of the present invention, two positioning grooves are provided, and a transition surface is connected between the two positioning grooves. The transition surface extends in an arc with the rotation center of the rotating block as the center of the circle.

[0016] According to some embodiments of the present invention, the sliding block has a ring portion, and the inclined path spirally extends along the circumference of the ring portion.

[0017] According to some embodiments of the present invention, the rotating block has a cylindrical portion and a convex strip spirally extending along the circumference of the cylindrical portion. The cylindrical portion is matched with the inside of the ring portion. The abutting portion is provided at the end of the convex strip, and the convex strip is matched with the inclined path.

[0018] According to some embodiments of the present utility model, a through hole coaxial with the cylindrical portion is provided, and the hydraulic damper passes through the through hole and abuts against the slider.

[0019] According to some embodiments of the present utility model, the slider is provided with a guiding groove, and a guiding portion is provided inside the second cylinder body. The guiding groove extends along the axial direction of the second cylinder body, and the guiding portion is received in the guiding groove.

[0020] According to some embodiments of the present utility model, the rotating block has a cylindrical portion located inside the first cylinder body. A first flat portion is provided on the outer periphery of the cylindrical portion, and a second flat portion is provided inside the first cylinder body. The first flat portion and the second flat portion are arranged opposite to each other.

[0021] According to some embodiments of the present utility model, the slider is provided with a positioning post, and the positioning post is received inside the spring.

[0022] According to some embodiments of the present utility model, a first adjusting bolt is threadedly connected inside the first cylinder body, and the first adjusting bolt abuts against the end of the hydraulic damper away from the slider.

[0023] According to some embodiments of the present utility model, a second adjusting bolt is threadedly connected inside the second cylinder body, and the second adjusting bolt abuts against the end of the spring away from the slider.

[0024] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0026] Figure 1 is a schematic structural view of a buffer hinge according to an embodiment of the present utility model;

[0027] Figure 2 is Figure 1 an exploded view of a buffer hinge shown;

[0028] Figure 3 is Figure 1 a cross-sectional view of a buffer hinge shown;

[0029] Figure 4 is Figure 1 a schematic structural view of a rotating block of a buffer hinge shown;

[0030] Figure 5 is Figure 1Schematic structural diagram of a slider of a buffer hinge shown;

[0031] Figure 6 is Figure 1 Schematic structural diagram of a first cylinder body of a buffer hinge shown.

[0032] Reference numerals: 100 - shaft core, 110 - first leaf, 120 - second leaf, 130 - first cylinder body, 140 - second cylinder body, 150 - first sleeve, 160 - second sleeve, 170 - first plain bearing, 180 - rotating block, 190 - slider, 200 - abutting portion, 210 - ramp, 220 - positioning groove, 230 - transition surface, 240 - ring portion, 250 - cylindrical portion, 260 - rib, 270 - through hole, 280 - guiding groove, 290 - guiding portion, 300 - first flat portion, 310 - second flat portion, 320 - gasket, 330 - second plain bearing, 340 - spring, 350 - positioning post, 360 - first adjusting bolt, 370 - hydraulic damper, 380 - second adjusting bolt, 390 - decorative cover. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, it should be understood that for the orientation description, such as up, down, front, back, left, right, etc., the orientation or position relationship indicated is based on the orientation or position 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.

[0035] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] A buffer hinge according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0038] Referring to Figure 1 , a buffer hinge according to an embodiment of the present utility model includes a shaft core 100, a first blade 110 and a second blade 120 that rotate coaxially. The first blade 110 and the second blade 120 rotate around the shaft core 100 as the rotation center. The shaft core 100 includes a first cylinder 130 and a second cylinder 140 that rotate coaxially.

[0039] Specifically, referring to Figure 3 , the first blade 110 has a first sleeve 150, and the outer surface of the first cylinder 130 is in an interference fit with the inner surface of the first sleeve 150.

[0040] The second blade 120 has a second sleeve 160, and the outer surface of the second cylinder 140 is in an interference fit with the inner surface of the second sleeve 160.

[0041] It should be noted that a first plain bearing 170 is clamped between the first sleeve 150 and the second sleeve 160 up and down, which is beneficial to reducing the friction between the first sleeve 150 and the second sleeve 160.

[0042] In terms of structure, the buffer hinge further includes a transmission mechanism, a spring 340 and a hydraulic damper 370.

[0043] Among them, the transmission mechanism includes a rotating block 180 and a slider 190. Referring to Figure 2 , Figure 4 and Figure 5 , the rotating block 180 is coaxially arranged on the first cylinder 130, the slider 190 is slidably arranged along the axial direction of the second cylinder 140, a contact portion 200 and an inclined path 210 for transmission are arranged between the rotating block 180 and the slider 190, at least one positioning groove 220 is connected to the end of the inclined path 210, and at least one positioning groove 220 is used to accommodate the contact portion 200 to prevent the rotating block 180 from rotating.

[0044] Therefore, during the rotation of the rotating block 180, the abutting portion 200 and the ramp 210 cooperate to drive the slider 190 to slide axially along the second cylinder 140. The rotating block 180 and the slider 190 are not easily damaged, which is beneficial to improving the service life of the transmission mechanism.

[0045] When the door leaf is opened to a certain angle, the abutting portion 200 cooperates with the positioning groove 220, that is, the abutting portion 200 enters the positioning groove 220, so that the abutting portion 200 is positioned in the positioning groove 220, and the rotating block 180 is difficult to rotate. Thus, the positioning of the door leaf is realized.

[0046] In some technical solutions, referring to Figure 4 and Figure 5 , the abutting portion 200 can be arranged on the rotating block 180, and the ramp 210 can be arranged on the slider 190.

[0047] In other technical solutions, the abutting portion 200 can also be arranged on the slider 190, and the ramp 210 can also be arranged on the rotating block 180.

[0048] In some embodiments of the present invention, two positioning grooves 220 are provided, and a transition surface 230 is connected between the two positioning grooves 220. The transition surface 230 extends in an arc with the rotation center of the rotating block 180 as the center of the circle.

[0049] It can be understood that the two positioning grooves 220 are distributed at 90° along the rotation direction of the rotating block 180. Of course, the distribution angle of the two positioning grooves 220 is not limited to 90°, and can be designed into different angles according to actual needs.

[0050] In some embodiments, during the opening process of the door leaf, after the abutting portion 200 passes through the ramp 210, it enters the first positioning groove 220, and the door leaf forms a 90° angle with the door frame, that is, the opening angle of the door leaf is 90°.

[0051] Then, after the abutting portion 200 passes through the transition surface 230, it enters the second positioning groove 220, and the door leaf forms a 180° angle with the door frame, that is, the opening angle of the door leaf is 180°.

[0052] In some embodiments of the present invention, referring to Figure 5 , the slider 190 has a ring portion 240, and the ramp 210 extends spirally along the circumference of the ring portion 240.

[0053] Therefore, machining the spirally extending ramp 210 on the ring portion 240 is greatly convenient for machining and is beneficial to reducing the machining cost.

[0054] In a further embodiment of the present invention, referring to Figure 4, the rotating block 180 has a cylindrical portion 250 and a rib 260 that spirally extends circumferentially along the cylindrical portion 250. The cylindrical portion 250 matches the interior of the ring portion 240. An abutting portion 200 is provided at the end of the rib 260, and the rib 260 matches the ramp 210.

[0055] Thus, the cylindrical portion 250 helps to improve the strength of the rib 260 and prevent the rib 260 from breaking during the contact between the abutting portion 200 and the ramp 210.

[0056] Moreover, when the slider 190 approaches the rotating block 180, the interior of the ring portion 240 can accommodate the cylindrical portion 250, which helps to improve the sliding smoothness of the slider 190.

[0057] In a further embodiment of the present utility model, the cylindrical portion 250 is provided with a coaxial through hole 270, and the hydraulic damper 370 passes through the through hole 270 and abuts against the slider 190.

[0058] It should be noted that during the door closing process, the hydraulic damper 370 always remains in contact with the slider 190. Therefore, there will be no noise generated by the collision between the hydraulic damper 370 and the slider 190 during the automatic door closing process.

[0059] In some embodiments of the present utility model, the slider 190 is provided with a guiding groove 280, and a guiding portion 290 is provided inside the second cylinder 140. The guiding groove 280 extends along the axial direction of the second cylinder 140, and the guiding groove 280 accommodates the guiding portion 290.

[0060] Therefore, when the ramp 210 and the abutting portion 200 cooperate for transmission, the rotation of the slider 190 is prevented, ensuring that the slider 190 can slide along the axial direction of the second cylinder 140.

[0061] In some embodiments of the present utility model, referring to Figure 4 and Figure 6 , the rotating block 180 has a cylindrical portion 250 located inside the first cylinder 130. A first flat portion 300 is provided on the outer periphery of the cylindrical portion 250, and a second flat portion 310 is provided inside the first cylinder 130. The first flat portion 300 and the second flat portion 310 are arranged oppositely.

[0062] It can be understood that the relative arrangement of the first flat portion 300 and the second flat portion 310 between the rotating block 180 and the first cylinder 130 enables the rotating block 180 and the first cylinder 130 to rotate synchronously. At the same time, it also greatly facilitates the installation of the rotating block 180.

[0063] In some embodiments of the present utility model, a gasket 320 and a second plain bearing 330 are sleeved on the cylindrical portion 250. A step is provided inside the second cylinder 140, and the second cylinder 140 clamps the gasket 320 and the second plain bearing 330 with the end face of the first cylinder 130 through the step, which is beneficial to reducing the friction generated by the relative rotation between the second cylinder 140 and the first cylinder 130.

[0064] Wherein, a spring 340 is arranged inside the second cylinder 140 and is located on the side of the slider 190 away from the rotating block 180, and is used to drive the slider 190 to slide in the direction close to the rotating block 180.

[0065] Therefore, during the closing process of the door leaf, the compressed spring 340 can drive the slider 190 to slide, and under the cooperative transmission of the abutting portion 200 and the ramp 210, the rotating block 180 rotates, so that the door leaf is automatically closed.

[0066] Wherein, the hydraulic damper 370 can expand and contract along the sliding direction of the slider 190, and is used to prevent the slider 190 from sliding in the direction close to the rotating block 180.

[0067] Therefore, during the closing process of the door leaf, the hydraulic damper 370 is always in contact with the slider 190, and the hydraulic damper 370 can slow down the moving speed of the slider 190, so as to slow down the rotating speed of the rotating block 180. Thus, the function of slowly closing the door leaf is realized.

[0068] In some embodiments of the present utility model, the slider 190 is provided with a positioning post 350, and the positioning post 350 is accommodated inside the spring 340, so that it is beneficial for the slider 190 to compress the spring 340.

[0069] In some embodiments of the present utility model, referring to Figure 3 , a first adjusting bolt 360 is threadedly connected inside the first cylinder 130, and the first adjusting bolt 360 abuts against the end of the hydraulic damper 370 away from the slider 190.

[0070] Therefore, according to the needs of use, the position of the first adjusting bolt 360 inside the first cylinder 130 can be adjusted, so as to change the damping force of the hydraulic damper 370 and ensure that the door leaf can be slowly closed.

[0071] In some embodiments of the present utility model, a second adjusting bolt 380 is threadedly connected inside the second cylinder 140, and the second adjusting bolt 380 abuts against the end of the spring 340 away from the slider 190.

[0072] Therefore, according to the needs of use, the position of the second adjusting bolt 380 inside the second cylinder 140 can be adjusted, so as to change the spring force of the spring 340 and achieve the change of the automatic closing speed of the door leaf.

[0073] In some embodiments of the present utility model, a decorative cover 390 is threadedly connected to the end of the second cylinder 140, and the decorative cover 390 is used to prevent dust and moisture from entering the interior of the second cylinder 140.

[0074] Therefore, the working principle of this embodiment is as follows:

[0075] During the opening process of the door leaf, when the door leaf rotates between 0° and 90°, the first vane 110 and the first cylinder 130 rotate synchronously, causing the rotating block 180 to rotate. The abutting portion 200 moves along the inclined path 210, causing the slider 190 to compress the spring 340. At the same time, the hydraulic damper 370 extends to provide a thrust force to the slider 190 to assist the slider 190 in compressing the spring 340. When the door leaf rotates to 90°, the abutting portion 200 enters the first positioning groove 220, and the door leaf can achieve 90° positioning and stop. According to the usage requirements, the door leaf can be further pushed forcefully to rotate. The abutting portion 200 passes through the transition surface 230. At the same time, the slider 190 stops sliding, and the abutting portion 200 enters the second positioning groove 220, and the door leaf can achieve 180° positioning and stop.

[0076] During the closing process of the door leaf, when the door leaf rotates between 180° and 90°, it is necessary to push the door leaf forcefully to move the abutting portion 200 out of the two positioning grooves 220. When the door leaf rotates between 90° and 0°, the spring 340 drives the slider 190 to move close to the rotating block 180. The abutting portion 200 moves along the inclined path 210, and the rotating block 180 rotates, causing the first vane 110 and the first cylinder 130 to rotate synchronously to achieve automatic closing of the door leaf. At the same time, the hydraulic damper 370 abuts against the slider 190, which can slow down the moving speed of the slider 190, and thus can slow down the closing speed of the door leaf.

[0077] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0078] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A buffer hinge, comprising an axis core (100), a first leaf piece (110) and a second leaf piece (120) that rotate coaxially, wherein the first leaf piece (110) and the second leaf piece (120) rotate with the axis core (100) as the rotation center, and the axis core (100) comprises a first cylinder (130) and a second cylinder (140) that rotate coaxially, characterized in that: include: A transmission mechanism, the transmission mechanism comprising a rotating block (180) and a slider (190), the rotating block (180) being coaxially arranged on the first cylinder (130), the slider (190) being slidable along the axial direction of the second cylinder (140), an abutment portion (200) and a ramp (210) for transmission being arranged between the rotating block (180) and the slider (190), the end of the ramp (210) being connected with at least one positioning groove (220), and at least one positioning groove (220) being used to accommodate the abutment portion (200) to prevent the rotating block (180) from rotating; a spring (340), wherein the spring (340) is disposed in the second cylinder (140) and is located on a side of the slider (190) away from the rotating block (180), and is used to drive the slider (190) to slide in a direction close to the rotating block (180); A hydraulic damper (370) is retractable along the sliding direction of the slider (190) and is used to prevent the slider (190) from sliding in a direction close to the rotating block (180).

2. A buffer hinge according to claim 1, characterized in that: Two positioning grooves (220) are provided, and a transition surface (230) is connected between the two positioning grooves (220). The transition surface (230) extends in an arc shape with the rotation center of the rotating block (180) as the center of the circle.

3. A buffer hinge according to claim 1, characterized in that: The slider (190) has a ring portion (240), and the ramp (210) extends spirally along the circumference of the ring portion (240).

4. A buffer hinge according to claim 3, characterized in that: The rotating block (180) comprises a cylindrical portion (250) and a convex strip (260) extending in a spiral direction along the circumference of the cylindrical portion (250), wherein the cylindrical portion (250) matches the interior of the ring portion (240), the abutment portion (200) is provided at the end of the convex strip (260), and the convex strip (260) matches the ramp (210).

5. A buffer hinge according to claim 4, characterized in that: The cylindrical portion (250) is provided with a coaxial through hole (270), and the hydraulic damper (370) passes through the through hole (270) and abuts against the slider (190).

6. The buffer hinge according to claim 1, characterized in that: The slider (190) is provided with a guide groove (280), and a guide portion (290) is provided inside the second cylinder (140). The guide groove (280) extends along the axial direction of the second cylinder (140), and the guide groove (280) accommodates the guide portion (290).

7. The buffer hinge according to claim 1, characterized in that: The rotating block (180) has a cylindrical portion (250) located inside the first cylinder (130), a first flat portion (300) is arranged on the outer periphery of the cylindrical portion (250), a second flat portion (310) is arranged inside the first cylinder (130), and the first flat portion (300) and the second flat portion (310) are arranged opposite to each other.

8. The buffer hinge according to claim 1, characterized in that: The slider (190) is provided with a positioning column (350), and the interior of the spring (340) accommodates the positioning column (350).

9. The buffer hinge according to claim 1, characterized in that: A first adjusting bolt (360) is threadedly connected to the interior of the first cylinder (130), and the first adjusting bolt (360) abuts against an end of the hydraulic damper (370) away from the sliding block (190).

10. The buffer hinge according to claim 1, characterized in that: A second adjusting bolt (380) is threadedly connected to the interior of the second cylinder (140), and the second adjusting bolt (380) abuts against an end of the spring (340) away from the slider (190).

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