A leak-proof hydraulic damping device

Abstract

The utility model provides a kind of hydraulic damping device of anti-leakage, including main cylinder body and the main piston of sliding installation in the main cylinder body, the main piston separates the inner cavity of the main cylinder body into first cavity and second cavity, pressure reducing valve is installed in the first cavity, the pressure reducing valve includes the pressure reducing cylinder body being placed in the first cavity and the pressure reducing piston of sliding installation in the pressure reducing cylinder body, one end of the pressure reducing cylinder body is provided with pressure reducing hole, the inner cavity of the pressure reducing cylinder body is communicated with the first cavity by the pressure reducing hole, the pressure reducing piston is used to open and close the pressure reducing hole;When the pressure in the first cavity is too large, hydraulic oil will push away the pressure reducing piston and enter the pressure reducing cylinder body by the pressure reducing hole, so that the pressure of the first cavity is reduced;A kind of hydraulic damping device of anti-leakage provided by the utility model overcomes the defect that existing hydraulic damping device is prone to oil leakage.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic damping devices, and in particular to a leak-proof hydraulic damping device. Background Technology

[0002] With the increasing demands for vibration reduction and the development of hydraulic technology, hydraulic damping devices have gradually gained widespread application and development. Hydraulic damping devices are primarily based on the viscosity and incompressibility of liquids. They generate damping force by controlling the flow of liquid in pipelines or hydraulic cylinders, thereby effectively absorbing and dissipating vibration energy. Compared with traditional vibration reduction methods, hydraulic damping devices can provide stronger damping force and have a more significant vibration attenuation effect, especially exhibiting better performance in high-frequency, large-amplitude vibration environments.

[0003] Components such as floor springs, hydraulic hinges, and door closers are all hydraulic damping devices. Existing hydraulic damping devices are prone to increased expansion coefficients due to thermal expansion and contraction, leading to oil leaks and ultimately loss of hydraulic function. Furthermore, improper operation can increase internal pressure, causing oil leaks at the seals and resulting in loss of hydraulic function. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by this utility model is to provide a leak-proof hydraulic damping device to overcome the defect of easy oil leakage in existing hydraulic damping devices.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a leak-proof hydraulic damping device, including a main cylinder and a main piston slidably mounted in the main cylinder. The main piston divides the inner cavity of the main cylinder into a first cavity and a second cavity. A pressure reducing valve is installed in the first cavity. The pressure reducing valve includes a pressure reducing cylinder placed in the first cavity and a pressure reducing piston slidably mounted in the pressure reducing cylinder. One end of the pressure reducing cylinder is provided with a pressure reducing hole. The inner cavity of the pressure reducing cylinder communicates with the first cavity through the pressure reducing hole. The pressure reducing piston is used to open and close the pressure reducing hole. When the pressure in the first cavity is too high, hydraulic oil will push the pressure reducing piston aside and enter the pressure reducing cylinder through the pressure reducing hole, thereby reducing the pressure in the first cavity.

[0008] In some embodiments, the pressure reducing valve further includes a sealing tail cap threaded to one end of the main cylinder body, the pressure reducing cylinder body being threaded onto the sealing tail cap; a first spring is installed between the sealing tail cap and the pressure reducing piston, the first spring always causing the pressure reducing piston to tend to move toward the pressure reducing hole.

[0009] In some embodiments, a first sealing ring is installed between the sealing tail cap and the main cylinder body, and a second sealing ring is installed between the decompression piston and the decompression cylinder body; the sealing tail cap has an air hole communicating with the outside at a position corresponding to the decompression cylinder body.

[0010] In some embodiments, a pressure relief valve is installed inside the main piston, and the hydraulic oil in the second chamber enters the first chamber through the pressure relief valve.

[0011] In some embodiments, the pressure relief valve includes a pressure relief valve seat installed in the main piston and a first valve ball movably installed in the pressure relief valve seat. The pressure relief valve seat has a pressure relief hole at one end facing the second cavity. The second cavity can be connected to the first cavity through the pressure relief hole. The first valve ball is used to open and close the pressure relief hole.

[0012] In some embodiments, the pressure relief valve further includes a spring seat threaded to one end of the pressure relief valve seat, and a second spring is installed between the spring seat and the first valve ball, the second spring always causing the first valve ball to tend to move toward the pressure relief hole.

[0013] In some embodiments, a plurality of third sealing rings are installed at intervals along the axial direction on the outer circumferential wall of the pressure relief valve seat, and a connecting through hole is provided in the spring seat.

[0014] In some embodiments, a camshaft is rotatably mounted in the main cylinder body, and the camshaft is provided with a cam portion corresponding to the main piston. The cam portion is used to push the main piston to slide. Rollers are symmetrically mounted on the main piston, and the cam portion is provided with a plurality of limiting grooves that can be adapted to the rollers.

[0015] In some embodiments, a one-way valve assembly is installed inside the main piston, through which hydraulic oil in the first cavity enters the second cavity; the one-way valve assembly includes a one-way valve seat fixed inside the main piston and a second valve ball movably installed inside the one-way valve seat, the one-way valve seat having a valve port at one end facing the first cavity, and a gasket and a filter screen installed at the other end; a third spring is installed between the gasket and the second valve ball, and the second valve ball is used to open and close the valve port.

[0016] In some embodiments, a main spring is installed between the sealing tail cap and the main piston, the main spring being used for resetting the main piston, and the decompression cylinder being located inside the main spring.

[0017] (III) Beneficial Effects

[0018] This utility model provides a leak-proof hydraulic damping device, which adds a pressure reducing valve. When the pressure in the first chamber is too high, the hydraulic oil will push the pressure reducing piston to move towards the sealing tail cap. At this time, the hydraulic oil can enter the pressure reducing cylinder through the pressure reducing hole, thereby reducing the pressure in the first chamber and preventing leakage due to excessive oil pressure. The use of a pressure relief valve allows the second chamber to release pressure into the first chamber, thereby producing a damping effect. In addition, when the door is closed violently, the opening of the pressure relief valve can be increased, and the second chamber can release pressure in time, avoiding loss of hydraulic capacity due to untimely pressure release. This overcomes the defect of easy oil leakage in existing 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 a leak-proof hydraulic damping device according to the present invention;

[0021] Figure 2 This is a cross-sectional view of a leak-proof hydraulic damping device according to the present invention;

[0022] Figure 3 This is an exploded view of a leak-proof hydraulic damping device according to the present invention.

[0023] Figure 4 This is a schematic diagram of the pressure reducing valve of a leak-proof hydraulic damping device according to the present invention.

[0024] Figure 5 This is a schematic diagram of the pressure relief valve of a leak-proof hydraulic damping device according to the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of a one-way valve assembly of a leak-proof hydraulic damping device according to this utility model.

[0026] Figure 7 This is a perspective view of the connection between the main piston and the camshaft of a leak-proof hydraulic damping device according to this utility model.

[0027] The component names corresponding to the various reference numerals in the figure are as follows: 1. Main cylinder body; 101. First chamber; 102. Second chamber; 2. Main piston; 3. Pressure reducing valve; 31. Pressure reducing cylinder body; 32. Pressure reducing piston; 33. Sealing tail cap; 34. First spring; 35. First sealing ring; 36. Second sealing ring; 311. Pressure reducing hole; 331. Air hole; 4. Pressure relief valve; 41. Pressure relief valve seat; 42. First valve ball; 43. Spring seat; 44. Second spring; 45. Third sealing ring; 411. Pressure relief hole; 431. Connecting through hole; 5. Camshaft; 501. Cam part; 502. Limiting groove; 6. Roller; 7. One-way valve assembly; 71. One-way valve seat; 72. Second valve ball; 73. Gasket; 74. Filter screen; 75. Third spring; 711. Valve port; 8. Main spring. Detailed Implementation

[0028] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0034] See Figures 1 to 7 This invention provides a leak-proof hydraulic damping device, comprising a main cylinder 1 and a main piston 2 slidably mounted within the main cylinder 1. The main piston 2 divides the inner cavity of the main cylinder 1 into a first cavity 101 and a second cavity 102, both of which are filled with hydraulic oil. A pressure reducing valve 3 is installed in the first cavity 101, which reduces the pressure when the pressure inside the first cavity 101 is too high, thereby preventing leakage due to excessive pressure.

[0035] See Figures 2 to 4 The pressure reducing valve 3 includes a pressure reducing cylinder 31 housed within the first chamber 101 and a pressure reducing piston 32 slidably mounted within the pressure reducing cylinder 31. One end of the pressure reducing cylinder 31 has a pressure reducing hole 311, and the inner cavity of the pressure reducing cylinder 31 communicates with the first chamber 101 through the pressure reducing hole 311. The pressure reducing piston 32 is used to open and close the pressure reducing hole 311. When the pressure inside the first chamber 101 is too high, hydraulic oil pushes the pressure reducing piston 32 aside and enters the pressure reducing cylinder 31 through the pressure reducing hole 311, thereby reducing the pressure in the first chamber 101. This structure, with the addition of the pressure reducing valve 3, allows the pressure reducing piston 32 to move outward when the pressure inside the main cylinder 1 is too high, ensuring oil pressure balance during use, preventing leakage, and extending service life.

[0036] In some embodiments, such as Figures 2 to 4As shown, the pressure reducing valve 3 also includes a sealing cap 33 threadedly connected to one end of the main cylinder 1, and the pressure reducing cylinder 31 threadedly connected to the sealing cap 33. A first spring 34 is installed between the sealing cap 33 and the pressure reducing piston 32. The first spring 34 always tends to make the pressure reducing piston 32 move toward the pressure reducing hole 311. Under normal conditions, the first spring 34 causes the pressure reducing piston 32 to close the pressure reducing hole 311. When the pressure in the first chamber 101 is too high, the hydraulic oil will push the pressure reducing piston 32 toward the sealing cap 33, and the first spring 34 will be compressed. At this time, the hydraulic oil can enter the pressure reducing cylinder 31 through the pressure reducing hole 311, thereby reducing the pressure in the first chamber 101 and preventing leakage due to excessive oil pressure.

[0037] In some embodiments, such as Figures 2 to 4 As shown, a first sealing ring 35 is installed between the sealing tail cap 33 and the main cylinder 1. The first sealing ring 35 is used to ensure the sealing of the connection between the sealing tail cap 33 and the main cylinder 1. A second sealing ring 36 is installed between the pressure reducing piston 32 and the pressure reducing cylinder 31. The second sealing ring 36 is fitted onto the pressure reducing piston 32 and is used to ensure the sealing of the connection between the pressure reducing piston 32 and the pressure reducing cylinder 31 to prevent leakage. The sealing tail cap 33 has an air hole 331 at the position corresponding to the pressure reducing cylinder 31, which communicates with the outside. When the pressure reducing piston 32 slides, it can exhaust or draw in air through the air hole 331 to ensure smooth sliding of the pressure reducing piston 32.

[0038] In some embodiments, such as Figure 2 , Figure 3 and Figure 5 As shown, the hydraulic damping device in this embodiment is mainly used in the field of floor springs and can be installed on the door to buffer when the door is closed. A pressure relief valve 4 is installed in the main piston 2. The hydraulic oil in the second chamber 102 enters the first chamber 101 through the pressure relief valve 4. The pressure relief valve 4 is a one-way valve structure and its opening degree can be automatically adjusted according to the pressure. When the door is closed violently (by wind or external force), the pressure in the second chamber 102 can cause the opening degree of the pressure relief valve 4 to increase, thereby achieving rapid pressure relief and avoiding loss of hydraulic function.

[0039] In some embodiments, such as Figure 2 , Figure 3 and Figure 5As shown, the pressure relief valve 4 includes a pressure relief valve seat 41 installed inside the main piston 2 and a first valve ball 42 movably installed inside the pressure relief valve seat 41. A pressure relief hole 411 is provided at one end of the pressure relief valve seat 41 facing the second cavity 102. The second cavity 102 can be connected to the first cavity 101 through the pressure relief hole 411. The first valve ball 42 is used to open and close the pressure relief hole 411. The pressure relief valve 4 also includes a spring seat 43 threaded to one end of the pressure relief valve seat 41. A second spring 44 is installed between the spring seat 43 and the first valve ball 42. The second spring 44 always tends to make the first valve ball 42 move towards the pressure relief hole 411. To ensure sealing, multiple third sealing rings 45 are installed axially at intervals on the outer circumferential wall of the pressure relief valve seat 41. A connecting through hole 431 is provided inside the spring seat 43 to ensure smooth communication between the first cavity 101 and the second cavity 102 when the pressure relief hole 411 is open.

[0040] In some embodiments, such as Figure 2 , Figure 3 and Figure 7 As shown, a camshaft 5 is rotatably mounted inside the main cylinder 1. The camshaft 5 has a cam portion 501 corresponding to the main piston 2, which pushes the main piston 2 to slide. Rollers 6 are symmetrically mounted on the main piston 2, and the cam portion 501 has multiple limiting slots 502 that can be adapted to the rollers 6. Through the cooperation of the rollers 6 and the limiting slots 502, it can have a door-stopping function, allowing the door to stop at a specific angle for convenient use. The use of symmetrical rollers 6 on both sides allows the door to open to both sides, with both sides having a door-stopping function.

[0041] In some embodiments, such as Figure 2 , Figure 3 and Figure 6 As shown, a one-way valve assembly 7 is installed inside the main piston 2. Hydraulic oil in the first chamber 101 enters the second chamber 102 through the one-way valve assembly 7. The one-way valve assembly 7 includes a one-way valve seat 71 fixed inside the main piston 2 and a second valve ball 72 movably installed inside the one-way valve seat 71. A valve port 711 is provided at one end of the one-way valve seat 71 facing the first chamber 101, and a gasket 73 and a filter screen 74 are installed at the other end of the one-way valve seat 71. A third spring 75 is installed between the gasket 73 and the second valve ball 72. The second valve ball 72 is used to open and close the valve port 711.

[0042] When the door is opened, the cam 501 pushes the main piston 2 to slide toward the first cavity 101, and the main spring 8 is compressed. At this time, the hydraulic oil in the first cavity 101 pushes open the second valve ball 72 and enters the second cavity 102 through the valve port 711. Since the third spring 75 has a small elastic force, the valve port 711 has a large opening, and the hydraulic oil flows into the second cavity 102 smoothly, making the door opening smooth. When the door is closed, under the action of the main spring 8, the main piston 2 moves toward the second cavity 102. At this time, the hydraulic oil in the second cavity 102 pushes open the first valve ball 42 and enters the first cavity 101 through the pressure relief hole 411. Since the third spring 75 has a large elastic force, the pressure relief hole 411 has a small opening, and the hydraulic oil in the second cavity 102 can slowly flow into the first cavity 101, thereby producing a damping effect.

[0043] In some embodiments, such as Figure 2 and Figure 3 As shown, a main spring 8 is installed between the sealing tail cap 33 and the main piston 2. The main spring 8 is used to reset the main piston 2, and the decompression cylinder 31 is located inside the main spring 8.

[0044] This leak-proof hydraulic damping device can be used for floor springs installed in glass doors without the need for digging, as well as for traditional floor springs buried underground, and for traditional concealed door closers on the market, making it widely applicable.

[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 leak-proof hydraulic damping device, comprising a main cylinder (1) and a main piston (2) slidably mounted within the main cylinder (1), the main piston (2) dividing the inner cavity of the main cylinder (1) into a first cavity (101) and a second cavity (102), characterized in that: A pressure reducing valve (3) is installed in the first cavity (101). The pressure reducing valve (3) includes a pressure reducing cylinder (31) placed in the first cavity (101) and a pressure reducing piston (32) slidably installed in the pressure reducing cylinder (31). A pressure reducing hole (311) is provided at one end of the pressure reducing cylinder (31). The inner cavity of the pressure reducing cylinder (31) is connected to the first cavity (101) through the pressure reducing hole (311). The pressure reducing piston (32) is used to open and close the pressure reducing hole (311). When the pressure in the first cavity (101) is too high, hydraulic oil will push the pressure reducing piston (32) open and enter the pressure reducing cylinder (31) through the pressure reducing hole (311), thereby reducing the pressure in the first cavity (101).

2. The anti-leakage hydraulic damping device as described in claim 1, characterized in that: The pressure reducing valve (3) also includes a sealing tail cap (33) threaded to one end of the main cylinder (1), and the pressure reducing cylinder (31) is threaded to the sealing tail cap (33); a first spring (34) is installed between the sealing tail cap (33) and the pressure reducing piston (32), and the first spring (34) always makes the pressure reducing piston (32) tend to move toward the pressure reducing hole (311).

3. The leak-proof hydraulic damping device as described in claim 2, characterized in that: A first sealing ring (35) is installed between the sealing tail cap (33) and the main cylinder (1), and a second sealing ring (36) is installed between the decompression piston (32) and the decompression cylinder (31); the sealing tail cap (33) has an air hole (331) communicating with the outside at the position corresponding to the decompression cylinder (31).

4. The leak-proof hydraulic damping device as described in claim 1, characterized in that: A pressure relief valve (4) is installed inside the main piston (2), and the hydraulic oil in the second chamber (102) enters the first chamber (101) through the pressure relief valve (4).

5. The leak-proof hydraulic damping device as described in claim 4, characterized in that: The pressure relief valve (4) includes a pressure relief valve seat (41) installed in the main piston (2) and a first valve ball (42) movably installed in the pressure relief valve seat (41). The pressure relief valve seat (41) has a pressure relief hole (411) at one end facing the second cavity (102). The second cavity (102) can be connected to the first cavity (101) through the pressure relief hole (411). The first valve ball (42) is used to open and close the pressure relief hole (411).

6. The leak-proof hydraulic damping device as described in claim 5, characterized in that: The pressure relief valve (4) also includes a spring seat (43) threaded to one end of the pressure relief valve seat (41). A second spring (44) is installed between the spring seat (43) and the first valve ball (42). The second spring (44) always makes the first valve ball (42) tend to move toward the pressure relief hole (411).

7. The leak-proof hydraulic damping device as described in claim 6, characterized in that: Multiple third sealing rings (45) are installed at intervals along the axial direction on the outer circumferential wall of the pressure relief valve seat (41), and a connecting through hole (431) is provided in the spring seat (43).

8. The leak-proof hydraulic damping device as described in claim 1, characterized in that: A camshaft (5) is rotatably mounted inside the main cylinder (1). The camshaft (5) is provided with a cam portion (501) corresponding to the main piston (2). The cam portion (501) is used to push the main piston (2) to slide. Rollers (6) are symmetrically mounted on the main piston (2). The cam portion (501) is provided with a plurality of limiting slots (502) that can be adapted to the rollers (6).

9. The leak-proof hydraulic damping device as described in claim 1, characterized in that: A one-way valve assembly (7) is installed inside the main piston (2). Hydraulic oil in the first chamber (101) enters the second chamber (102) through the one-way valve assembly (7). The one-way valve assembly (7) includes a one-way valve seat (71) fixed inside the main piston (2) and a second valve ball (72) movably installed inside the one-way valve seat (71). A valve port (711) is provided at one end of the one-way valve seat (71) facing the first chamber (101), and a gasket (73) and a filter screen (74) are installed at the other end. A third spring (75) is installed between the gasket (73) and the second valve ball (72). The second valve ball (72) is used to open and close the valve port (711).

10. The leak-proof hydraulic damping device as described in claim 2, characterized in that: A main spring (8) is installed between the sealing tail cap (33) and the main piston (2). The main spring (8) is used to reset the main piston (2). The pressure reducing cylinder (31) is located inside the main spring (8).

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