Dynamic oil chamber hydraulic buffer oil core

Abstract

This utility model discloses a dynamic oil chamber hydraulic buffer core, an outer sleeve, and a central shaft. The outer sleeve contains an oil reservoir for holding hydraulic oil. The central shaft passes through one end of the outer sleeve, with an axial inner hole at its exposed end. The axial inner hole includes a threaded section and a smooth section. An adjusting screw is installed on the threaded section, and a movable plunger is installed on the smooth section. An oil passage hole communicating with the oil reservoir is located at the end of the smooth section away from the threaded section. Therefore, the dynamic oil chamber hydraulic buffer core of this utility model can solve the problems of easy oil leakage due to changes in ambient temperature and the inconvenience of installation requiring vertical orientation in current hydraulic hinges on the market. It maintains stable oil chamber pressure, achieves reliable operation under varying temperature environments, and improves the product's environmental adaptability and ease of use.

Description

Technical Field

[0001] This utility model relates to the field of hardware hydraulics, and in particular to a dynamic oil chamber hydraulic buffer core. Background Technology

[0002] Currently, hydraulic buffer functions are becoming increasingly common in door hinges, including both surface-mounted and concealed types. The core of these hinges is a hydraulically buffered spindle installed within the hinge itself. Traditional spindles have a fixed internal oil reservoir capacity. When the temperature changes, the expansion coefficients of the internal hydraulic oil and the spindle components differ. As the ambient temperature rises, the hydraulic oil volume increases, leading to increased internal pressure in the spindle, causing oil leakage or even bursting, resulting in damage. Furthermore, hydraulic buffer spindles also have speed adjustment functions. When adjusting the speed, the adjustment screw must extend into the oil cavity, occupying space and further increasing internal pressure, making the product more susceptible to damage. To reduce the risk of damage, the product needs to be installed vertically; otherwise, the hydraulic buffer speed will be unstable. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a dynamic oil chamber hydraulic buffer core, which can solve the problems of easy oil leakage due to changes in ambient temperature and the inconvenience of requiring vertical installation in current hydraulic hinges on the market.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A dynamic oil chamber hydraulic buffer core, comprising

[0006] The outer sleeve has an inner oil reservoir for holding hydraulic oil.

[0007] A central shaft is provided through one end of the outer sleeve, and its exposed end is provided with an axial inner hole. The axial inner hole includes a threaded section and a smooth section. An adjusting screw is installed on the threaded section, and a movable plunger is provided on the smooth section. An oil passage hole is provided on the end of the smooth section away from the threaded section, which communicates with the oil storage chamber.

[0008] According to an embodiment of this utility model, a dynamic hydraulic buffer core with a hydraulic chamber has at least the following beneficial effects: The dynamic hydraulic buffer core of this utility model, through an innovative automatic compensation mechanism, fundamentally solves the problems of oil leakage caused by temperature changes and installation direction limitations in traditional hydraulic hinges. Its core lies in the collaborative design of a movable plunger and a pressure spring. When the ambient temperature rises, causing the hydraulic oil to expand, the oil pressure automatically pushes the movable plunger to move, increasing the volume of the oil reservoir. When the temperature drops and the oil contracts, the vacuum drives the movable plunger back to compensate for the volume change, achieving dynamic balance of oil pressure. This intelligent adjustment method ensures that the oil reservoir is always full, effectively avoiding the risk of oil leakage or product damage due to abnormal oil pressure. Simultaneously, the unique dynamic compensation characteristic completely eliminates the dependence of traditional products on installation direction, allowing the hinge to be installed in any direction without cavitation or buffer stalling, solving both the limitations of vertical installation and overcoming the requirements for distinguishing between left and right opening. In addition, when the user adjusts the closing speed, the movement of the speed adjustment screw can also be compensated by the automatic displacement of the movable plunger, maintaining the stability of the oil chamber pressure. This achieves reliable operation under both temperature changes and manual adjustment conditions, improving the product's environmental adaptability and ease of use.

[0009] According to some embodiments of the present invention, a pressure spring is provided between the movable plunger and the adjusting screw.

[0010] The advantage is that the pressure spring setting further enhances the intelligent two-way compensation function. When the temperature rises, the oil pressure pushes the plunger to compress the spring and expand the oil storage capacity. When the temperature drops, the spring rebounds and drives the plunger to reset and replenish the oil. At the same time, when the user adjusts the screw, the spring automatically balances the displacement, ensuring that the oil pressure is always stable in the optimal working range.

[0011] According to some embodiments of the present invention, the outer sleeve is connected to an upper cover and a lower cover at both ends to form the oil storage cavity, and the central shaft passes through the upper cover and is axially positioned and rotatably connected to it.

[0012] The advantages are: the sealed connection between the upper and lower caps forms a stable and reliable oil storage cavity, which not only ensures the overall structural strength, but also provides precise rotational support for the central shaft, greatly improving product assembly efficiency and maintenance convenience.

[0013] According to some embodiments of the present invention, a first sealing ring is provided between the outer sleeve and the upper cover, a second sealing ring is provided between the outer sleeve and the lower cover, and a third sealing ring is provided between the central shaft and the upper cover.

[0014] The benefits are: the multi-seal ring combination design constructs a three-dimensional leak-proof system, effectively blocking the leakage path of hydraulic oil, significantly reducing the risk of performance degradation due to seal failure, and extending the product's service life.

[0015] According to some embodiments of the present invention, a piston is provided in the oil storage chamber, and the central shaft is located at one end of the oil storage chamber and is linked with the piston.

[0016] The advantage is that the mechanical linkage between the piston and the central shaft converts the rotational motion into precise axial displacement, which not only enables precise control of the door opening and closing angle, but also provides a stable driving force source for the dynamic oil chamber.

[0017] According to some embodiments of the present invention, a cylindrical portion is provided at one end of the central shaft near the piston, one end of the piston is sleeved inside the cylindrical portion, spiral grooves are provided on both sides of the inner wall of the cylindrical portion, and a guide post is provided on the side of the piston that is slidably connected to the spiral grooves.

[0018] The benefits are that the cooperation between the spiral groove and the guide post converts the rotational motion of the central shaft into the linear motion of the piston, forming a highly efficient motion conversion mechanism, eliminating the frictional loss of the traditional connecting rod structure, ensuring the smoothness of the piston motion, and improving the consistency of the buffering process.

[0019] According to some embodiments of this utility model, the piston is provided with an oil needle hole at one end near the lower cover, the lower cover is provided with a speed adjustment screw, and the front end of the speed adjustment screw is provided with a speed adjustment oil needle that extends into the oil needle hole to adjust the closing speed.

[0020] The advantage is that by changing the orifice area of ​​the needle needle by adjusting the speed of the needle, the flow speed of the hydraulic oil on both sides of the piston can be changed, thereby adjusting the closing speed.

[0021] According to some embodiments of this utility model, a fourth sealing ring is provided between the speed regulating screw and the lower cover, and a fifth sealing ring is provided between the movable plunger and the optical hole section.

[0022] The advantages are: Dedicated sealing rings are installed at key moving parts of the speed control screw to prevent seal failure caused by high-frequency adjustment operations, thus maintaining the long-term stability of the speed control system. The fifth sealing ring ensures dynamic sealing during the movement of the moving plunger, maintaining oil pressure transmission sensitivity and preventing hydraulic oil in the reservoir from seeping into the pressure spring side.

[0023] According to some embodiments of the present invention, the oil passage hole is disposed on the side of the central shaft.

[0024] The advantage is that the lateral oil passage can simplify the structure on the front side of the central shaft, allowing the hydraulic oil in the oil reservoir to flow into the axial inner hole from the lateral oil passage.

[0025] According to some embodiments of the present invention, the front end of the movable plunger is provided with a diameter reduction section.

[0026] The benefits are that the reduced diameter structure at the front end of the plunger forms a hydraulic oil guide channel, which enhances the effect of oil pressure, makes the plunger movement more sensitive and precise, and improves the timeliness of temperature compensation.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0030] Figure 2 for Figure 1 Enlarged view of the top;

[0031] Figure 3 for Figure 1 Exploded view of the central axis;

[0032] Figure 4 This is a schematic diagram of another embodiment of the present invention;

[0033] Figure 5 for Figure 4 Exploded view of the central axis.

[0034] Reference numerals: Outer sleeve 100, oil reservoir 110, central shaft 120, axial inner hole 130, threaded section 140, smooth section 150, adjusting screw 160, movable plunger 170, pressure spring 180, oil passage hole 190, upper cover 200, lower cover 210, first sealing ring 220, second sealing ring 230, third sealing ring 240, piston 250, cylinder 260, spiral groove 270, guide post 280, oil needle hole 290, speed adjusting screw 300, speed adjusting oil needle 310, fourth sealing ring 320, fifth sealing ring 330, reducing diameter section 340. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The following is for reference. Figures 1-5 A dynamic oil chamber hydraulic buffer core is described in detail with two specific embodiments. It is important to understand that the following description is merely illustrative and not intended to limit the scope of the invention.

[0040] like Figures 1-3 As shown, in the first embodiment of this utility model, the dynamic oil chamber hydraulic buffer core mainly consists of an outer sleeve 100, a central shaft 120, and an internal buffer structure. The outer sleeve 100 is connected to an upper cap 200 and a lower cap 210 at both ends, forming a closed oil storage chamber 110 to hold hydraulic oil. The central shaft 120 passes through one end of the outer sleeve 100 and is axially positioned and rotatably connected to it, ensuring stable rotation during hinge opening and closing. The exposed end of the central shaft 120 has an axial inner hole 130, which includes a threaded section 140 and a smooth section 150. An adjusting screw 160 is installed in the threaded section 140, and a movable plunger 170 is provided in the smooth section 150. A pressure spring 180 is provided between the movable plunger 170 and the adjusting screw 160, forming a dynamic compensation mechanism. An oil passage hole 190 is provided at the end of the smooth section 150 away from the threaded section 140, allowing the oil storage chamber 110 to communicate with the axial inner hole 130, ensuring the flow of hydraulic oil.

[0041] Specifically, such as Figure 1 As shown, a piston 250 is installed in the oil storage chamber 110. The piston 250 is linked to the central shaft 120. A cylindrical portion 260 is provided at one end of the central shaft 120 near the piston 250, and one end of the piston 250 is fitted inside the cylindrical portion 260. Spiral grooves 270 are provided on both sides of the inner wall of the cylindrical portion 260, and a guide post 280 is provided on the side of the piston 250. The guide post 280 slides with the spiral groove 270, so that the rotational motion of the central shaft 120 is converted into the axial motion of the piston 250, thereby achieving a buffering function. An oil needle hole 290 is provided at one end of the piston 250 near the lower cover 210. The lower cover 210 is provided with a speed adjusting screw 300. A speed adjusting oil needle 310 is provided at the front end of the speed adjusting screw 300, which extends into the oil needle hole 290 to adjust the flow rate of the hydraulic oil, thereby controlling the closing speed.

[0042] This invention employs a multi-layer sealing structure. A first sealing ring 220 and a second sealing ring 230 are respectively provided between the outer sleeve 100 and the upper cover 200 and the lower cover 210, and a third sealing ring 240 is provided between the central shaft 120 and the upper cover 200, forming a multi-layer sealing structure that effectively prevents hydraulic oil leakage. A fourth sealing ring 320 is provided between the speed adjusting screw 300 and the lower cover 210 to prevent hydraulic oil leakage during adjustment. A fifth sealing ring 330 is provided between the movable plunger 170 and the through-hole section 150 to ensure sealing during plunger movement and prevent hydraulic oil from seeping into the pressure spring 180 side. This comprehensive sealing structure ensures the long-term sealing performance of the system under various operating conditions.

[0043] like Figure 2 and Figure 3 As shown, the oil passage 190 is located on the side of the central shaft 120, allowing the hydraulic oil in the oil reservoir 110 to flow smoothly into the axial inner hole 130. The movable plunger 170 has a reducing section 340 at its front end to optimize the flow path of the hydraulic oil, improve oil pressure transmission efficiency, make the displacement of the movable plunger 170 more sensitive, and enhance the dynamic compensation effect. In another embodiment of this utility model, as... Figure 4 and Figure 5 As shown, the oil passage 190 is located at the bottom of the smooth section 150 and is connected to the oil storage chamber 110 through the cylindrical part 260 of the central shaft 120. At this time, the front end of the movable plunger 170 does not need to be provided with the reducing part 340, so the overall structure is more compact.

[0044] The overall working process of the dynamic hydraulic buffer core is as follows: When the hinge rotates, the hydraulic oil between the front end of the piston 250 and the lower cover 210 passes through the gap between the speed regulating needle 310 and the needle hole 290, forming a buffering effect. When the ambient temperature rises, the hydraulic oil expands, and the oil pressure pushes the movable plunger 170 to compress the pressure spring 180, increasing the volume of the oil reservoir 110 and preventing excessive internal pressure from causing oil leakage or damage. When the temperature drops, the pressure spring 180 pushes the movable plunger 170 back to its original position, compensating for oil contraction and keeping the oil reservoir 110 full. The speed regulating screw 300 can change the flow area of ​​the needle hole 290 by adjusting the position of the speed regulating needle 310, thereby controlling the closing speed. The automatic compensation mechanism of the movable plunger 170 ensures stable oil pressure during speed regulation. Through the synergistic action of the movable plunger 170 and the pressure spring 180, the volume of the oil reservoir 110 is dynamically adjusted, effectively solving the problem of abnormal oil pressure caused by temperature changes and avoiding the risk of oil leakage or explosion. Meanwhile, this design eliminates the installation direction limitations of traditional hydraulic buffer hinges, allowing for installation in any direction, and the speed adjustment process does not affect oil pressure stability, significantly improving the product's reliability and applicability. The multi-seal structure further enhances leak-proof performance, extends service life, and enables stable operation under various environmental conditions.

[0045] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A dynamic oil chamber hydraulic buffer core, characterized in that, include: The outer sleeve (100) has an oil reservoir (110) inside, which is used to contain hydraulic oil; A central shaft (120) is provided through one end of the outer sleeve (100), and its exposed end is provided with an axial inner hole (130). The axial inner hole (130) includes a threaded section (140) and a smooth section (150). An adjusting screw (160) is installed on the threaded section (140), and a movable plunger (170) is provided on the smooth section (150). An oil passage hole (190) is provided on the end of the smooth section (150) away from the threaded section (140) and communicates with the oil storage chamber (110).

2. The dynamic oil chamber hydraulic buffer core according to claim 1, characterized in that, A pressure spring (180) is provided between the movable plunger (170) and the adjusting screw (160).

3. The dynamic oil chamber hydraulic buffer core according to claim 1, characterized in that, The outer sleeve (100) is connected to an upper cap (200) and a lower cap (210) at both ends to form the oil storage cavity (110). The central shaft (120) passes through the upper cap (200) and is axially positioned and rotatably connected to it.

4. The dynamic oil chamber hydraulic buffer core according to claim 3, characterized in that, A first sealing ring (220) is provided between the outer tube (100) and the upper cover (200), a second sealing ring (230) is provided between the outer tube (100) and the lower cover (210), and a third sealing ring (240) is provided between the central shaft (120) and the upper cover (200).

5. A dynamic oil chamber hydraulic buffer core according to claim 3, characterized in that, The oil storage chamber (110) is equipped with a piston (250), and the central shaft (120) is located at one end of the oil storage chamber (110) and is linked with the piston (250).

6. A dynamic oil chamber hydraulic buffer core according to claim 5, characterized in that, The central shaft (120) has a cylindrical part (260) near the piston (250) at one end. One end of the piston (250) is fitted inside the cylindrical part (260). The inner wall of the cylindrical part (260) has spiral grooves (270) on both sides. The piston (250) has a guide post (280) on the side that is slidably connected to the spiral grooves (270).

7. A dynamic oil chamber hydraulic buffer core according to claim 5, characterized in that, The piston (250) has an oil needle hole (290) near the lower cover (210). The lower cover (210) has a speed adjustment screw (300). The front end of the speed adjustment screw (300) has a speed adjustment oil needle (310) that extends into the oil needle hole (290) to adjust the closing speed.

8. A dynamic oil chamber hydraulic buffer core according to claim 7, characterized in that, A fourth sealing ring (320) is provided between the speed adjusting screw (300) and the lower cover (210), and a fifth sealing ring (330) is provided between the movable plunger (170) and the light hole section (150).

9. A dynamic oil chamber hydraulic buffer core according to claim 1, characterized in that, The oil passage (190) is located on the side of the central shaft (120).

10. A dynamic oil chamber hydraulic buffer core according to claim 9, characterized in that, The movable plunger (170) has a diameter reduction section (340) at its front end.

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