Hydraulic hinge shaft core structure

Abstract

The utility model discloses a hydraulic hinge axle core structure relates to hydraulic hinge technical field. The structure includes sleeve and its inside axle core subassembly, and axle core subassembly is constituted by main shaft, S cylinder and sleeve shell coaxial sleeve joint, and the main shaft passes through the adjusting screw rod on it and drives the adjusting block sliding, to adjust the pre -tightening force of compression spring that is sleeved on the main shaft, thereby realizes the stepless regulation of door closing force, and the second rolling wheel of main shaft end portion is embedded in the first sliding groove of S cylinder, realizes the linkage of rotation and axial sliding, and the first rolling wheel of sleeve shell inner wall is embedded in the S shape wave groove of S cylinder, and the rotary motion of S cylinder is converted into its own axial reciprocating motion, and the independent buffer cylinder is connected to the end of S cylinder, and provides the damping of door closing end. The utility model replaces the traditional hydraulic oil circuit with pure mechanical structure, fundamentally puts an end to the oil leakage risk, replaces the sliding friction with the rolling friction, makes the hinge operation more smooth, the silence, the life is longer, and has the excellent performance of door closing force adjustable and soft buffer.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic hinge technology, specifically to a hydraulic hinge shaft structure. Background Technology

[0002] Hinges are key hardware components that connect door panels to the door frame and allow the door panels to rotate. As users' demands for a better user experience increase, hydraulic hinges (or soft-close hinges) with functions such as automatic closing and soft-close have emerged and are widely used in residential, commercial, and public spaces.

[0003] Currently, most hydraulic hinges on the market use a structure with built-in hydraulic oil and a piston, achieving cushioning through the throttling effect of the oil in a narrow flow channel. These hinges have the following inherent drawbacks: First, their cushioning force is not easily adjustable, preventing users from flexibly setting it according to door weight or personal preference; second, hydraulic structures have extremely high requirements for sealing, and long-term use carries the risk of oil leakage due to aging of the seals. Once a leak occurs, the cushioning function fails and is difficult to repair; third, traditional sliding friction structures are prone to wear after prolonged use, leading to hinge loosening, abnormal noise, and affecting service life and user experience.

[0004] Therefore, there is an urgent need for a new type of hinge shaft structure that is more reliable, has adjustable closing force, and does not rely on hydraulic oil, in order to overcome the shortcomings of existing technologies. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a hydraulic hinge shaft structure that solves the technical problems of existing hydraulic hinges, such as non-adjustable buffer, easy oil leakage and failure, and rapid wear and abnormal noise in traditional structures.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic hinge shaft structure, comprising a sleeve, the inner cavity of which is provided with a shaft assembly; the shaft assembly includes a main shaft, an S-cylinder coaxially sleeved outside the main shaft, and a housing coaxially sleeved outside the S-cylinder; a second sliding groove is symmetrically formed along the axial direction on the surface of the main shaft, an adjusting block is slidably sleeved in the inner cavity of the second sliding groove, and an adjusting screw is threadedly connected to the main shaft, one end of which extends into the main shaft and is rotatably connected to the adjusting block, such that rotating the adjusting screw can drive the adjusting block to slide along the second sliding groove. A second rolling wheel is fixedly installed at the end of the main shaft; the cylinder wall of the S cylinder is symmetrically provided with a first sliding groove extending along its axial direction and a wave-shaped S groove; a top cover is fixedly connected to one end of the S cylinder, and a buffer cylinder is connected to the other end; the end of the main shaft extends into the inner cavity of the S cylinder, and the second rolling wheel is placed in the first sliding groove and can roll and slide along it; a first rolling wheel is fixedly installed on the inner wall of the housing, the first rolling wheel is housed in the S groove and can roll and slide along it; a compression spring is sleeved on the surface of the main shaft, and the compression spring presses against the top cover and the adjusting block.

[0007] Preferably, the buffer cylinder includes an installation cylinder fixedly installed in the inner cavity of the housing. One end of the installation cylinder is closed by a bottom cover, and the other end is slidably provided with a connecting rod through a sealing sleeve. A spring is provided between the end of the connecting rod located inside the installation cylinder and the bottom cover, and the other end of the connecting rod is fixedly connected to the end center of the S cylinder.

[0008] Preferably, the mounting cylinder is fixed to the inner cavity of the housing by interference fit, welding or snap-fit.

[0009] Preferably, the width of the adjusting block is greater than the diameter of the main shaft, and its two sides protrude from the surface of the main shaft, with a gap maintained between the protruding parts and the inner wall of the sleeve.

[0010] Preferably, the sleeve is fixedly fitted onto the outside of the housing, and a bearing is also fitted onto the main shaft, the outer ring of which is interference-fitted or tightly fitted with the inner wall of the sleeve.

[0011] Preferably, the wavy trajectory of the S-groove is a continuous and smooth S-shaped curve.

[0012] Preferably, the connecting end of the adjusting screw and the adjusting block is rotatably connected by a bearing or a bushing. This invention provides a hydraulic hinge shaft structure. Compared with the prior art, it has the following advantages: 1. Achieves purely mechanical, oil-free hydraulic buffering and door closing: This utility model completely abandons the traditional hydraulic oil structure, provides door closing power through a compression spring, and achieves end-point buffering through the cooperation of the spring in the buffer cylinder and the S-groove curve, fundamentally eliminating the functional failure problem caused by oil leakage, which is environmentally friendly and reliable.

[0013] 2. Infinitely adjustable closing force: By rotating the adjusting screw, the adjusting block can be precisely driven to move, thereby changing the preload of the compression spring. Users can easily and continuously adjust the closing force according to the weight of the door and usage needs, significantly improving versatility and user experience.

[0014] 3. Smooth operation, quiet operation and durability: This utility model creatively utilizes the method of the first rolling wheel rolling in the S-groove and the second rolling wheel rolling in the first sliding groove to transmit motion and force, transforming the sliding friction in the traditional structure into rolling friction. This greatly reduces frictional resistance and wear during operation, effectively prevents hinge loosening caused by wear, and ensures that the entire opening and closing process is exceptionally smooth and quiet, with a longer service life.

[0015] 4. Equipped with a dual buffer and reset mechanism: The system is equipped with a main compression spring and a buffer cylinder spring. The compression spring is the main power source for closing the door, while the buffer cylinder spring not only stores energy when the door is opened, but also effectively absorbs and dissipates the remaining kinetic energy at the end of closing by cooperating with the movement of the S-groove, so as to achieve gentle closing of the door, avoid violent impact between the door leaf and the door frame, and protect the door body and the hinges themselves.

[0016] 5. Compact structure and high integration: The entire shaft assembly integrates all functional components within the sleeve. The structure is ingeniously designed, with high space utilization, making it easy to assemble, replace, and maintain as a whole module. It is suitable for standard hinge installation dimensions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram showing the structural breakdown of this utility model; Figure 4 This is a schematic diagram of the structural shaft assembly of this utility model; Figure 5 This is a partial schematic diagram of the structural shaft assembly of this utility model.

[0018] In the diagram: 1. Sleeve; 2. Shaft assembly; 21. Main shaft; 22. Bearing; 23. Adjusting block; 24. S-cylinder; 25. Top cover; 26. First sliding groove; 27. S-groove; 28. First rolling wheel; 29. ​​Buffer cylinder; 291. Mounting cylinder; 292. Bottom cover; 293. Spring; 294. Connecting rod; 295. Sealing sleeve; 210. Sleeve housing; 211. Compression spring; 212. Second rolling wheel; 213. Adjusting screw; 214. Second sliding groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 3 This utility model provides a technical solution: a hydraulic hinge shaft structure, the core function of which is to realize the smooth opening and closing of the door and provide adjustable closing force and buffering effect.

[0021] The hydraulic hinge shaft structure mainly includes an outer sleeve 1 and a shaft assembly 2 disposed in its inner cavity. The sleeve 1 is usually installed on one of the hinge blades by welding or screw fixing.

[0022] The shaft assembly 2 is the core of this utility model, and its specific structure and connection relationship are as follows: spindle and adjustment mechanism The spindle assembly 2 includes a main spindle 21, which is typically fixedly connected to another leaf of the hinge through its exposed end, thereby transmitting the rotational motion of the hinge to the surface of the spindle assembly main spindle 21. A second sliding groove 214 is symmetrically provided along its axial direction. An adjustment block 23 with an I-shaped or T-shaped cross section is slidably accommodated in the second sliding groove 214, so that it can slide along the axial direction of the main spindle 21 without falling out of the groove.

[0023] The adjusting screw 213 is screwed into the threaded hole inside the main shaft 21 from the top end of the main shaft 21 (i.e., the end away from the S cylinder 24). The end of the adjusting screw 213 that extends into the main shaft 21 is rotatably connected to the adjusting block 23 through a miniature bearing or a smooth bushing. When the adjusting screw 213 is rotated using a tool (such as an Allen wrench), since the adjusting screw 213 is threadedly engaged with the main shaft 21 and its end is rotatably connected to the adjusting block 23 rather than fixed, the rotational movement of the adjusting screw 213 is converted into the linear movement of the adjusting block 23 along the second sliding groove 214. The end of the main shaft 21 (i.e., the end that extends into the S cylinder 24) is fixedly mounted with a second rolling wheel 212 through a pin or interference fit.

[0024] S-cylinder and motion conversion mechanism S cylinder 24 is coaxially mounted outside the main shaft 21. Two key channels are machined on the cylinder wall of S cylinder 24: one is a straight groove first sliding groove 26 extending along its axial direction; the other is an S groove 27 that presents a continuous, smooth S-shaped wave curve. One end of S cylinder 24 is fixed to a top cover 25 by threaded connection or welding. The top cover 25 has a through hole in the center for the main shaft 21 to pass through. The other end of S cylinder 24 is connected to the components of buffer cylinder 29.

[0025] One end of the main shaft 21 with the second rolling wheel 212 extends into the inner cavity of the S cylinder 24, and the second rolling wheel 212 is just accommodated in the first sliding groove 26. This fit allows the second rolling wheel 212 to both roll and slide in the first sliding groove 26 when the main shaft 21 rotates, transmitting the rotational motion of the main shaft to the S cylinder 24 on the one hand, and allowing the S cylinder 24 to move axially relative to the main shaft 21 on the other hand.

[0026] Housing and fixing mechanism The housing 210 is coaxially fitted outside the S cylinder 24 and the buffer cylinder 29. The inner wall of the housing 210 is fixedly installed with a first rolling wheel 28 by a pin. The rim of the first rolling wheel 28 is precisely embedded in the S groove 27 of the S cylinder 24. The outer wall of the housing 210 is fixed together with the sleeve 1 by interference fit or keyway connection.

[0027] Resilience and buffer system The compression spring 211 is sleeved outside the main shaft 21 and pre-pressed between the top cover 25 of the S cylinder 24 and the adjusting block 23 on the main shaft 21. The initial preload of the compression spring 211 can be adjusted by the aforementioned adjusting mechanism. By screwing in the adjusting screw 213 and pushing the adjusting block 23 toward the top cover 25, the compression spring 211 is further compressed, the elastic force increases, and thus the closing force increases; conversely, the closing force decreases.

[0028] The buffer cylinder 29 specifically includes a mounting cylinder 291, which is fixedly installed at the end of the inner cavity of the housing 210 by an interference fit. One end of the mounting cylinder 291 is closed by the bottom cover 292, and the other end is fitted with a sealing sleeve 295. The connecting rod 294 passes through the sealing sleeve 295 and can slide axially. The sealing sleeve 295 ensures the sealing of the inside of the mounting cylinder 291, prevents dust from entering and retains grease. A spring 293 is provided between the end of the connecting rod 294 located inside the mounting cylinder 291 and the bottom cover 292. The other end of the connecting rod 294 is fixed to the center point of the end of the S cylinder 24 by thread or welding.

[0029] Working principle: When the door is opened, the hinge blades drive the main shaft 21 to rotate inside the sleeve 1 (the main shaft 21 contacts the inner wall of the sleeve 1 through the bearing 22 on its surface to ensure smooth rotation). The rotation of the main shaft 21 drives the S cylinder 24 to rotate together through the cooperation of the second rolling wheel 212 and the first sliding groove 26. Since the sleeve 210 (through the sleeve 1) is fixed on the blade connected to the door frame, when the S cylinder 24 rotates, the S groove 27 on it will move relative to the fixed first rolling wheel 28. The wavy surface of the S groove 27 will force the first rolling wheel 28 to move along its trajectory. This movement actually generates an axial thrust on the S cylinder 24, forcing the S cylinder 24 to move along the axial direction of the main shaft 21 towards the compression spring 211.

[0030] The axial movement of cylinder S24 has two effects: Its top cover 25 will further compress the compression spring 211, converting kinetic energy into the potential energy of the spring.

[0031] It will pull the spring 293 inside the buffer cylinder 29 through the connecting rod 294, causing it to stretch and store another part of potential energy.

[0032] During this process, all sliding contact is achieved through rolling friction between the first rolling wheel 28 and the S-groove 27, and between the second rolling wheel 212 and the first sliding groove 26, which greatly reduces wear and noise and makes the opening and closing process smooth and fluid.

[0033] When the door closes, the compressed spring 211 and the spring 293 in the buffer cylinder 29 simultaneously release their stored potential energy. The compressed spring 211 pushes the S cylinder 24 to reset, while the spring 293 in the buffer cylinder 29 pulls the S cylinder 24 to reset via the connecting rod 294. The reset motion of the S cylinder 24 is converted into rotational motion in the opposite direction through the cooperation of the S groove 27 and the first rolling wheel 28, driving the main shaft 21 to rotate, thereby realizing automatic door closing. The main function of the spring 293 in the buffer cylinder 29 is to provide damping at the end of the closing stroke, absorb the remaining kinetic energy, realize gentle door closing, and avoid impact.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic hinge shaft structure, comprising a sleeve (1), characterized in that: The inner cavity of the sleeve (1) is provided with a shaft assembly (2); The shaft assembly (2) includes a main shaft (21), an S cylinder (24) coaxially sleeved outside the main shaft (21), and a housing (210) coaxially sleeved outside the S cylinder (24). The main shaft (21) has a second sliding groove (214) symmetrically formed along the axial direction on its surface. An adjusting block (23) is slidably sleeved in the inner cavity of the second sliding groove (214). An adjusting screw (213) is also threadedly connected to the main shaft (21). One end of the adjusting screw (213) extends into the main shaft (21) and is rotatably connected to the adjusting block (23), so that rotating the adjusting screw (213) can drive the adjusting block (23) to slide along the second sliding groove (214). A second rolling wheel (212) is fixedly provided at the end of the main shaft (21). The S cylinder (24) has a first sliding groove (26) extending along its axial direction and a wave-shaped S groove (27) symmetrically opened on its cylinder wall. One end of the S cylinder (24) is fixedly connected to a top cover (25), and the other end is connected to a buffer cylinder (29). The end of the main shaft (21) extends into the inner cavity of the S cylinder (24), and the second rolling wheel (212) is housed in the first sliding groove (26) and can roll and slide along it. The inner wall of the casing (210) is fixedly provided with a first rolling wheel (28), which is housed in the S groove (27) and can roll and slide along it. A compression spring (211) is sleeved on the surface of the main shaft (21), and the main shaft (21) presses against the top cover (25) and the adjusting block (23).

2. The hydraulic hinge shaft structure according to claim 1, characterized in that: The buffer cylinder (29) includes an installation cylinder (291) fixedly installed in the inner cavity of the housing (210). One end of the installation cylinder (291) is closed by the bottom cover (292), and the other end is slidably provided with a connecting rod (294) through a sealing sleeve (295). A spring (293) is provided between the end of the connecting rod (294) located inside the installation cylinder (291) and the bottom cover (292). The other end of the connecting rod (294) is fixedly connected to the end center of the S cylinder (24).

3. The hydraulic hinge shaft structure according to claim 2, characterized in that: The mounting cylinder (291) is fixed to the inner cavity of the housing (210) by interference fit, welding or snap-fit.

4. The hydraulic hinge shaft structure according to claim 1, characterized in that: The width of the adjusting block (23) is greater than the diameter of the main shaft (21), and its two sides protrude from the surface of the main shaft (21), and there is a gap between the protruding part and the inner wall of the sleeve (1).

5. The hydraulic hinge shaft structure according to claim 1, characterized in that: The sleeve (1) is fixedly sleeved on the outside of the housing (210), and a bearing (22) is also sleeved on the main shaft (21). The outer ring of the bearing (22) is either interference-fitted or tightly fitted with the inner wall of the sleeve (1).

6. The hydraulic hinge shaft structure according to claim 1, characterized in that: The wave-shaped trajectory of the S-groove (27) is a continuous and smooth S-shaped curve.

7. The hydraulic hinge shaft structure according to claim 1, characterized in that: The connecting end of the adjusting screw (213) and the adjusting block (23) is rotatably connected by either a bearing or a bushing.

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