Large-stroke hydraulic damping device for hydraulic hinge

Abstract

The large-stroke hydraulic damping device for the hydraulic hinge comprises a slidable hydraulic cylinder body and a piston rod inserted in the hydraulic cylinder body, a guide assembly and a piston are installed at the end, arranged in the hydraulic cylinder body, of the piston rod, and the guide assembly is used for guiding the hydraulic cylinder body; the piston divides an inner cavity of the hydraulic cylinder body into a piston left cavity and a piston right cavity, a pressure relief gap is formed between the piston and the hydraulic cylinder body, and hydraulic oil in the piston left cavity enters the piston right cavity through the pressure relief gap; the guide assembly is located in the left cavity of the piston and comprises a guide seat abutting against one side of the piston, and an oil inlet channel used for communicating the left cavity of the piston with the pressure relief gap is formed in the guide seat; according to the large-stroke hydraulic damping device for the hydraulic hinge, the guide assembly is additionally arranged so that the hydraulic cylinder body can be guided, it is guaranteed that the hydraulic cylinder body does not swing or deviate under the long-stroke condition, and stable operation of the hydraulic cylinder body is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic hinges, and in particular to a large-stroke hydraulic damping device for hydraulic hinges. Background Technology

[0002] Hinges, as components that connect two solid objects and allow them to rotate relative to each other, are widely used in doors, windows, furniture, and many other fields. As people's demands for quality of life and user experience increase, traditional hinges have gradually become insufficient in terms of functionality, leading to the development of hydraulic hinges. Hydraulic hinges, based on ordinary hinges, add a hydraulic damping system; the rotation speed of the pivot is controlled by the flow of hydraulic oil in a sealed cavity, achieving buffering and speed regulation functions for the opening and closing of doors, windows, or furniture doors.

[0003] With technological advancements, hydraulic hinges are becoming increasingly smaller in size to accommodate narrower door installations. However, to ensure sufficient hydraulic damping, the stroke of the hydraulic cylinder needs to be increased after the overall size reduction. This increased stroke makes the hydraulic cylinder more prone to swaying and misalignment during operation, leading to increased friction and wear, and potentially even hydraulic damping failure, resulting in poor operational stability and a shorter service life. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by this utility model is to provide a large-stroke hydraulic damping device for hydraulic hinges, so as to overcome the defect of poor operational stability of existing large-stroke hydraulic damping devices.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a long-stroke hydraulic damping device for hydraulic hinges, including a slidable hydraulic cylinder and a piston rod inserted into the hydraulic cylinder. A guide assembly and a piston are installed at one end of the piston rod within the hydraulic cylinder. The guide assembly guides the hydraulic cylinder. The piston divides the inner cavity of the hydraulic cylinder into a left piston chamber and a right piston chamber. A pressure relief gap is formed between the piston and the hydraulic cylinder, through which hydraulic oil from the left piston chamber enters the right piston chamber. The guide assembly is located within the left piston chamber and includes a guide seat abutting against one side of the piston. The guide seat has an oil inlet channel connecting the left piston chamber and the pressure relief gap. This structure, by adding a guide assembly, guides the hydraulic cylinder, ensuring that the hydraulic cylinder does not sway or deviate during long strokes, thus ensuring stable operation.

[0008] In some embodiments, the oil inlet channel includes symmetrically arranged first through holes extending axially along the guide seat. One end of the guide seat near the piston is recessed to form an oil inlet chamber. Second through holes are radially arranged on both sides of the oil inlet chamber. The left chamber of the piston connects to the pressure relief gap sequentially through the first through holes, the oil inlet chamber, and the second through holes. This structure, by providing the first through holes, the oil inlet chamber, and the second through holes, ensures that the guide seat does not affect the flow of hydraulic oil, guaranteeing the realization of the hydraulic damping function.

[0009] In some embodiments, the guide assembly further includes a guide ring sleeved on the guide seat, the guide ring being in sliding contact with the inner wall of the hydraulic cylinder, and an annular groove for mounting the guide ring being recessed on the outer circumferential wall of the guide seat.

[0010] In some embodiments, the guide ring has a notch, and the left chamber of the piston communicates with the pressure relief gap through the notch. This structure, by providing the notch, ensures that the guide ring does not affect the flow of hydraulic oil, thus guaranteeing the realization of the hydraulic damping function.

[0011] In some embodiments, a baffle ring is slidably fitted onto the piston, and the baffle ring slides in contact with the inner wall of the hydraulic cylinder. The baffle ring is used to open and close the pressure relief gap.

[0012] In some embodiments, the piston has a limiting flange at one end facing the guide seat, and a limiting ring is fitted at the other end; the limiting flange and the inner wall of the hydraulic cylinder form the pressure relief gap, and the flow-blocking ring is placed between the limiting flange and the limiting ring; when the flow-blocking ring abuts against the limiting flange, the pressure relief gap is closed.

[0013] In some embodiments, the piston is provided with a plurality of pressure relief grooves at equal intervals in an annular shape, the flow-blocking ring and the limiting ring are both sleeved on the outside of the pressure relief grooves, and the pressure relief gap is connected to the right chamber of the piston through the pressure relief grooves.

[0014] In some embodiments, a return flow hole is provided on the piston extending axially, through which the hydraulic oil in the right chamber of the piston flows back to the left chamber of the piston.

[0015] In some embodiments, a pen-shaped housing is mounted on the outside of the hydraulic cylinder body, and the end of the piston rod away from the hydraulic cylinder body is fixed to the pen-shaped housing; a spring is fitted on the piston rod, an end cap is threaded to the end of the hydraulic cylinder body, a spring seat is installed inside the pen-shaped housing, and the spring abuts against the end cap and the spring seat.

[0016] In some embodiments, a camshaft is rotatably mounted on the pen-shaped housing, and a top head is provided at one end of the hydraulic cylinder, the top head abutting against the camshaft; a plurality of lubrication grooves are provided axially spaced on the outer circumferential wall of the hydraulic cylinder.

[0017] (III) Beneficial Effects

[0018] This utility model provides a long-stroke hydraulic damping device for hydraulic hinges, which adds a guide component. Through the cooperation of the guide seat and the guide ring, the hydraulic cylinder can be guided to ensure that the hydraulic cylinder will not swing or deviate during long strokes, thus ensuring its stable operation. At the same time, it also reduces the friction between the hydraulic cylinder and other components, reduces wear, and extends service life. In addition, the guide seat is provided with a first through hole, an oil inlet chamber and a second through hole, and the guide ring is provided with a notch to ensure smooth communication between the left chamber of the piston and the pressure relief gap, without affecting the hydraulic damping function and ensuring the effect of use. It overcomes the defect of poor operational stability of existing long-stroke hydraulic damping devices. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the application scenario of the large-stroke hydraulic damping device for hydraulic hinges according to this utility model;

[0021] Figure 2 An exploded view showing the application scenario of the large-stroke hydraulic damping device for hydraulic hinges according to this utility model;

[0022] Figure 3 This is a cross-sectional view showing the application scenario of the large-stroke hydraulic damping device for hydraulic hinges according to this utility model;

[0023] Figure 4 This is a perspective view of the connection between the hydraulic cylinder and the camshaft of a large-stroke hydraulic damping device for hydraulic hinges according to this utility model.

[0024] Figure 5 This is a cross-sectional view of a large-stroke hydraulic damping device for hydraulic hinges according to this utility model;

[0025] Figure 6 This is a perspective view of the guide assembly, piston, and piston rod connection of a large-stroke hydraulic damping device for hydraulic hinges according to this utility model.

[0026] Figure 7This is an exploded view of the guide assembly, piston, and piston rod of a large-stroke hydraulic damping device for hydraulic hinges according to this utility model.

[0027] Figure 8 This is a perspective view of the guide seat of a large-stroke hydraulic damping device for a hydraulic hinge according to this utility model;

[0028] The component names corresponding to the various reference numerals in the figure are as follows: 1. Hydraulic cylinder body; 101. Left piston chamber; 102. Right piston chamber; 103. Pressure relief clearance; 104. Top head; 105. Lubrication groove; 2. Piston rod; 3. Guide assembly; 31. Guide seat; 32. Guide ring; 311. First perforation; 312. Oil inlet chamber; 313. Second perforation; 314. Annular groove; 321. Notch; 4. Piston; 401. Limiting flange; 402. Pressure relief groove; 403. Return flow hole; 5. Baffle ring; 6. Limiting ring; 7. Pen-shaped housing; 8. Spring; 9. End cap; 10. Spring seat; 11. Camshaft. Detailed Implementation

[0029] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0032] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0033] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0034] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0035] See Figures 1 to 8 This utility model provides a long-stroke hydraulic damping device for hydraulic hinges, including a slidable hydraulic cylinder 1 and a piston rod 2 inserted into the hydraulic cylinder 1. Part of the piston rod 2 is located inside the hydraulic cylinder 1, and the other part is located outside the hydraulic cylinder 1. A guide assembly 3 and a piston 4 are installed at the end of the piston rod 2 inside the hydraulic cylinder 1. Both the guide assembly 3 and the piston 4 are fitted onto the piston rod 2, and the guide assembly 3 is located on one side of the piston 4. The guide assembly 3 guides the hydraulic cylinder 1, thereby ensuring stable operation of the hydraulic cylinder 1 during long strokes.

[0036] See Figure 5 The piston 4 is placed inside the hydraulic cylinder 1, dividing the inner cavity of the hydraulic cylinder 1 into a left piston chamber 101 and a right piston chamber 102, both of which are filled with hydraulic oil. A pressure relief gap 103 is formed between the piston 4 and the hydraulic cylinder 1, through which the hydraulic oil in the left piston chamber 101 enters the right piston chamber 102. The guide assembly 3 is located inside the left piston chamber 101 and includes a guide seat 31 abutting against one side of the piston 4. The guide seat 31 has an oil inlet channel for connecting the left piston chamber 101 and the pressure relief gap 103. This structure, by adding the guide assembly, guides the hydraulic cylinder through the cooperation of the guide seat and the guide ring, ensuring that the hydraulic cylinder will not swing or deviate during long strokes, thus ensuring its stable operation; it also reduces friction between the hydraulic cylinder and other components, reducing wear and extending service life.

[0037] In some embodiments, such as Figures 5 to 8 As shown, the oil inlet channel includes a first through hole 311 symmetrically arranged and extending axially along the guide seat 31. The guide seat 31 is recessed at one end near the piston 4 to form an oil inlet chamber 312. The two sides of the oil inlet chamber 312 are provided with second through holes 313 radially. The piston left chamber 101 is connected to the pressure relief gap 103 through the first through hole 311, the oil inlet chamber 312 and the second through hole 313 in sequence.

[0038] In some embodiments, such as Figures 5 to 8 As shown, the guide assembly 3 also includes a guide ring 32 sleeved on the guide seat 31. The guide ring 32 slides in contact with the inner wall of the hydraulic cylinder body 1. An annular groove 314 for installing the guide ring 32 is recessed on the outer circumferential wall of the guide seat 31, and the guide ring 32 is fitted into the annular groove 314. The guide ring 32 has a notch 321, through which the left chamber of the piston 101 communicates with the pressure relief gap 103. With this structure, when the door is opened, the hydraulic oil in the left chamber of the piston can reach the pressure relief gap 103 through the oil inlet channel and the notch 321, ensuring smooth oil flow without affecting the hydraulic damping function and guaranteeing the operating effect.

[0039] In some embodiments, such as Figures 5 to 7 As shown, a baffle ring 5 is slidably fitted on the piston 4. The baffle ring 5 slides in contact with the inner wall of the hydraulic cylinder 1 and is used to open and close the pressure relief gap 103. A limiting flange 401 is provided at one end of the piston 4 facing the guide seat 31, and a limiting ring 6 is fitted at the other end of the piston 4. The limiting ring 6 is used to limit the baffle ring 5 to the right. A pressure relief gap 103 is formed between the limiting flange 401 and the inner wall of the hydraulic cylinder 1. The baffle ring 5 is placed between the limiting flange 401 and the limiting ring 6. When the baffle ring 5 abuts against the limiting flange 401, the pressure relief gap 103 is closed. When the baffle ring 5 disengages from the limiting flange 401, the pressure relief gap 103 is opened, and the hydraulic oil in the left chamber 101 of the piston can enter the right chamber 102 of the piston through the pressure relief gap 103.

[0040] In some embodiments, such as Figures 5 to 7 As shown, the piston 4 has multiple pressure relief grooves 402 arranged in annular intervals. The flow-blocking ring 5 and the limiting ring 6 are both sleeved on the outside of the pressure relief grooves 402. The pressure relief gap 103 connects to the right chamber 102 of the piston through the pressure relief grooves 402. A return flow hole 403 is provided on the piston 4 extending axially. In order to ensure the damping effect, the diameter of the return flow hole 403 should be small. The hydraulic oil in the right chamber 102 of the piston flows back to the left chamber 101 of the piston through the return flow hole 403. When the valve is closed, the pressure relief gap 103 is closed, and the hydraulic oil in the right chamber 102 of the piston can only flow back to the left chamber 101 of the piston through the return flow hole 403. Since the diameter of the return flow hole 403 is small, the hydraulic cylinder 1 can slowly slide and reset, thereby producing a better damping effect.

[0041] In some embodiments, such as Figures 1 to 3As shown, a pen-shaped housing 7 is mounted on the outer side of the hydraulic cylinder body 1. A cylindrical inner cavity is provided axially inside the pen-shaped housing 7. The hydraulic cylinder body 1 is slidably mounted inside the cylindrical inner cavity. The end of the piston rod 2 away from the hydraulic cylinder body 1 is fixed to the pen-shaped housing 7. A spring 8 is fitted on the piston rod 2. An end cap 9 is threadedly connected to the end of the hydraulic cylinder body 1. A spring seat 10 is installed inside the pen-shaped housing 7. The spring 8 rests between the end cap 9 and the spring seat 10.

[0042] In some embodiments, such as Figures 1 to 3 As shown, a camshaft 11 is rotatably mounted on the pen-shaped housing 7. The camshaft 11 is fixed to the external base, and the spring 8 always causes the hydraulic cylinder 1 to tend to move towards the camshaft 11. In use, the pen-shaped housing 7 is fixed to the outer door sash, and the base is fixed to the ground. One end of the hydraulic cylinder 1 is provided with a top head 104, which abuts against the camshaft 11. Multiple lubrication grooves 105 are axially spaced on the outer circumferential wall of the hydraulic cylinder 1. The lubrication grooves 105 can be filled with grease to reduce the friction between the hydraulic cylinder 1 and the pen-shaped housing 7. In this embodiment, the large-stroke hydraulic damping device is mainly used in hydraulic hinges. In actual use, it can also be applied to other hydraulic damping scenarios as needed.

[0043] The operation of this long-stroke hydraulic damping device is as follows:

[0044] When the door opens, the door leaf causes the pen-shaped housing 7 to rotate relative to the camshaft 11. The camshaft 11 pushes the hydraulic cylinder 1 towards the spring seat 10, compressing the spring 8. The baffle ring 5 is pushed onto the limit ring 6 by the hydraulic oil, opening the pressure relief gap 103. At this time, the hydraulic oil in the left chamber 101 of the piston reaches the pressure relief gap 103 through the oil inlet channel and notch 321, and enters the right chamber 102 of the piston through the pressure relief groove 402. When the door closes, under the force of the spring 8, the hydraulic cylinder 1 returns to its original position, the baffle ring 5 is pushed onto the limit flange 401 by the hydraulic oil, and the pressure relief gap 103 is closed. At this time, the hydraulic oil in the right chamber 102 of the piston can only flow back to the left chamber 101 of the piston through the return flow hole 403. Since the diameter of the return flow hole 403 is small, the hydraulic cylinder 1 can slowly slide back to its original position, thus slowly closing the door leaf.

[0045] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0046] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A long-stroke hydraulic damping device for a hydraulic hinge, comprising a slidable hydraulic cylinder (1) and a piston rod (2) inserted within the hydraulic cylinder (1), characterized in that: The piston rod (2) is installed with a guide assembly (3) and a piston (4) at one end inside the hydraulic cylinder (1). The guide assembly (3) is used to guide the hydraulic cylinder (1). The piston (4) divides the inner cavity of the hydraulic cylinder (1) into a left piston cavity (101) and a right piston cavity (102). A pressure relief gap (103) is formed between the piston (4) and the hydraulic cylinder (1). The hydraulic oil in the left piston cavity (101) enters the right piston cavity (102) through the pressure relief gap (103). The guide assembly (3) is located inside the left piston cavity (101). The guide assembly (3) includes a guide seat (31) abutting against one side of the piston (4). The guide seat (31) is provided with an oil inlet channel for connecting the left piston cavity (101) and the pressure relief gap (103).

2. The long-stroke hydraulic damper device for a hydraulic hinge according to claim 1, characterized in that: The oil inlet channel includes a first through hole (311) symmetrically arranged and extending axially along the guide seat (31). The guide seat (31) has an indented oil inlet chamber (312) at one end near the piston (4). The oil inlet chamber (312) has a second through hole (313) arranged radially on both sides. The piston left chamber (101) is connected to the pressure relief gap (103) in sequence through the first through hole (311), the oil inlet chamber (312) and the second through hole (313).

3. The long-stroke hydraulic damper device for hydraulic hinges according to claim 1, characterized in that: The guide assembly (3) further includes a guide ring (32) sleeved on the guide seat (31), the guide ring (32) slidingly contacting the inner wall of the hydraulic cylinder (1), and an annular groove (314) for installing the guide ring (32) is formed inward on the outer circumferential wall of the guide seat (31).

4. The long-stroke hydraulic damper device for hydraulic hinges according to claim 3, characterized in that: The guide ring (32) is provided with a notch (321), and the left chamber of the piston (101) is connected to the pressure relief gap (103) through the notch (321).

5. The long-stroke hydraulic damper device for hydraulic hinges according to claim 1, characterized in that: The piston (4) has a baffle ring (5) slidingly mounted on it. The baffle ring (5) slides in contact with the inner wall of the hydraulic cylinder (1). The baffle ring (5) is used to open and close the pressure relief gap (103).

6. A long-stroke hydraulic damper device for a hydraulic hinge according to claim 5, characterized in that: The piston (4) has a limiting flange (401) at one end facing the guide seat (31), and a limiting ring (6) is fitted at the other end; the limiting flange (401) and the inner wall of the hydraulic cylinder (1) form the pressure relief gap (103), and the flow-blocking ring (5) is placed between the limiting flange (401) and the limiting ring (6); when the flow-blocking ring (5) abuts against the limiting flange (401), the pressure relief gap (103) is closed.

7. A long-stroke hydraulic damper device for a hydraulic hinge according to claim 6, characterized in that: The piston (4) is provided with a plurality of pressure relief grooves (402) at equal intervals in an annular shape. The flow-blocking ring (5) and the limiting ring (6) are both sleeved on the outside of the pressure relief grooves (402). The pressure relief gap (103) is connected to the right chamber (102) of the piston through the pressure relief grooves (402).

8. The long-stroke hydraulic damper device for hydraulic hinges according to claim 1, characterized in that: A return flow hole (403) is provided on the piston (4) extending axially, through which the hydraulic oil in the right chamber (102) of the piston flows back to the left chamber (101) of the piston.

9. The long-stroke hydraulic damper device for hydraulic hinges according to claim 1, characterized in that: A pen-shaped housing (7) is installed on the outside of the hydraulic cylinder (1), and the end of the piston rod (2) away from the hydraulic cylinder (1) is fixed to the pen-shaped housing (7); a spring (8) is fitted on the piston rod (2), and an end cap (9) is threadedly connected to the end of the hydraulic cylinder (1). A spring seat (10) is installed inside the pen-shaped housing (7), and the spring (8) abuts against the end cap (9) and the spring seat (10).

10. The long-stroke hydraulic damper device for hydraulic hinges according to claim 9, characterized in that: A camshaft (11) is rotatably mounted on the pen-shaped housing (7). A top head (104) is provided at one end of the hydraulic cylinder (1), and the top head (104) abuts against the camshaft (11). A plurality of lubrication grooves (105) are provided axially at intervals on the outer circumferential wall of the hydraulic cylinder (1).

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