Floor spring

Abstract

The utility model provides a floor spring which comprises a rotating shaft, a shell, a first elastic mechanism and a first piston. And a first cam structure is arranged on the rotating shaft. The shell is rotationally connected with the rotating shaft, an oil way is arranged on the shell, and the oil way is provided with a first oil port. The first piston abuts against the first cam structure through the first elastic mechanism, a transverse flow guide structure is arranged on the circumferential side face of the first piston, and when the first piston moves, the position of the flow guide structure can directly face the first oil port. The first piston is arranged in the shell, so that the shell is provided with a first cavity located on one side of the first piston and a second cavity located on the other side of the first piston, and the flow guide structure communicates with the first cavity and / or the second cavity. According to the utility model, the oil port of the oil way can be well prevented from being blocked by the movable piston, and hydraulic oil can flow between the oil way and the inner cavity of the shell.

Description

Technical Field

[0001] This utility model relates to a floor spring that facilitates airflow. Background Technology

[0002] Floor springs are commonly used in the installation of sliding doors, providing a certain degree of cushioning when the door opens and closes. CN105672797A discloses a floor spring whose structure reliably converts the longitudinal movement of the piston into the rotational movement of the shaft, thus achieving cushioning during the opening and closing of the sliding door.

[0003] The inside of a floor spring is filled with hydraulic oil. When the piston compresses the hydraulic oil, it flows, further contributing to the cushioning effect of the floor spring. The hydraulic oil flows through oil passages on the outer casing and enters and exits through oil ports. Because the piston has a certain length, it can easily block the oil ports during its movement, preventing the hydraulic oil from entering and exiting the oil passages, thus affecting the hydraulic cushioning effect. Utility Model Content

[0004] Therefore, it is necessary to provide a floor spring that can better prevent the oil port of the oil circuit from being blocked by the moving piston, and facilitate the flow of hydraulic oil between the oil circuit and the inner cavity of the housing.

[0005] This utility model provides a floor spring, the floor spring comprising:

[0006] A rotating shaft, on which a first cam structure is provided;

[0007] The housing is rotatably connected to the rotating shaft, and the housing is provided with an oil passage, the oil passage having a first oil port;

[0008] A first elastic mechanism is disposed within the outer casing;

[0009] The first piston is held against the first cam structure by the first elastic mechanism. The first piston has a transverse flow guide structure on its peripheral side. When the first piston moves, the position of the flow guide structure can be directly opposite the first oil port. The first piston is disposed in the housing such that the housing has a first chamber located on one side of the first piston and a second chamber located on the other side of the first piston. The flow guide structure connects the first chamber and / or the second chamber.

[0010] Preferably, the flow guiding structure is a cross-section of the first piston.

[0011] Preferably, the first piston is provided with a sealing ring. When the first piston moves, the first oil port can be located on one side of the sealing ring or on the other side of the sealing ring. The flow guiding structure includes a first part located on one side of the sealing ring and a second part located on the other side of the sealing ring. The first part communicates with the first chamber, and the second part communicates with the second chamber.

[0012] Preferably, the oil circuit further includes a second oil port and a third oil port, the first oil port being located between the second oil port and the third oil port, the second oil port being provided with a first flow rate regulating valve, the third oil port being provided with a second flow rate regulating valve, the second oil port always being connected to the first chamber, and the third oil port always being connected to the second chamber.

[0013] Preferably, the position of the second oil port corresponds to the first part, and the position of the third oil port corresponds to the second part. When the first piston moves, the position of the second oil port may be directly opposite the first part and / or the position of the third oil port may be directly opposite the second part.

[0014] Preferably, the rotating shaft is provided with a second cam structure, and the floor spring further includes:

[0015] A second elastic mechanism is disposed within the outer casing;

[0016] The second piston is held against the second cam structure by the second elastic mechanism.

[0017] Preferably, the first piston and the first elastic mechanism are located on one side of the rotating shaft, and the second piston and the second elastic mechanism are located on the other side of the rotating shaft.

[0018] Preferably, the second elastic mechanism includes a first spring and a second spring, wherein the second spring is disposed within the first spring.

[0019] Preferably, the floor spring further includes a horizontally arranged guide rod, the first piston has a first guide hole, the second piston has a second guide hole, and the guide rod is laterally movably placed in the first guide hole and the second guide hole.

[0020] Preferably, the first piston is provided with a receiving groove, and a roller that abuts against the first cam structure is provided in the receiving groove. The first piston is provided with a through hole that connects the receiving groove and the second chamber, and the receiving groove connects to the first chamber.

[0021] The present invention has the following beneficial effects: The first piston of the present invention has a transverse flow guiding structure on its peripheral side. The flow guiding structure connects the first chamber and / or the second chamber inside the outer shell. When the first piston moves inside the outer shell, the position of the flow guiding structure can be directly opposite the first oil port. Therefore, the first oil port will not be blocked by the moving first piston, and the hydraulic oil can flow at the flow guiding structure, which is conducive to the flow of hydraulic oil between the oil circuit and the inner cavity of the outer shell. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of a specific embodiment of the present utility model.

[0023] Figure 2 This is a cross-sectional schematic diagram of a specific embodiment of the present utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. It is understood that the accompanying drawings are provided for reference and illustration only and are not intended to limit the present utility model. The connection relationships shown in the drawings are only for clear description and do not limit the connection method.

[0025] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0026] It should also be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Please see Figure 1 and Figure 2 As shown in the figure, a specific embodiment of this utility model provides a floor spring, which includes a rotating shaft 10 and a housing 20. The rotating shaft 10 is rotatably connected to the housing 20. The rotating shaft 10 can be connected to a movable door, and the housing 20 can be installed on the ground. The housing 20 has a complete chamber inside.

[0028] The rotating shaft 10 is provided with a first cam structure 11 and a second cam structure 12.

[0029] The outer casing 20 is provided with a first piston 31 that cooperates with the first cam structure 11 and a second piston 32 that cooperates with the second cam structure 12.

[0030] Separated by the first piston 31 and the second piston 32, the outer casing 20 has a first chamber 21, a second chamber 22, and a third chamber 23, wherein the first chamber 21 is located between the first piston 31 and the second piston 32, the second chamber 22 is located on the other side of the first piston 31, and the third chamber 23 is located on the other side of the second piston 32. The rotating shaft 10 is disposed in the first chamber 21.

[0031] The first piston 31 is held against the first cam structure 11 by a first elastic mechanism 41, and the second piston 32 is held against the second cam structure 12 by a second elastic mechanism 42. The first elastic mechanism 41 and the second elastic mechanism 42 are disposed within the housing 20.

[0032] The second elastic mechanism 42 may include a first spring 421 and a second spring 422, wherein the second spring 422 is disposed within the first spring 421. The first elastic mechanism 41 may include a third spring.

[0033] The first piston 31 and the second piston 32 may be respectively disposed on both sides of the rotating shaft 10, and correspondingly, the first elastic mechanism 41 and the second elastic mechanism 42 are respectively disposed on both sides of the rotating shaft 10.

[0034] The first piston 31 has a transverse flow guide structure 311 on its peripheral side, which connects the first chamber 21 and / or the second chamber 22. The outer casing 20 is provided with an oil passage 24, which has a first oil port 241. When the first cam structure 11 and the first elastic mechanism 41 drive the first piston 31 to move along the inner cavity of the outer casing 20, the position of the flow guide structure 311 can be directly opposite the first oil port 241.

[0035] In this embodiment, the flow guiding structure 311 is a cross-section of the first piston 31.

[0036] In this way, hydraulic oil can smoothly flow into or out of the first oil port 241 from the guide structure 311, and smoothly flow into or out of the first chamber 21 and / or the second chamber 22 from the guide structure 311, without blocking the first oil port 241 due to the movement of the first piston 31, which facilitates the flow of hydraulic oil between the oil passage 24 and the inner cavity of the outer casing 20.

[0037] The first piston 31 is provided with a sealing ring 312. When the first piston 31 moves, the first oil port 241 can be located on one side of the sealing ring 312 or on the other side of the sealing ring 312.

[0038] The flow guiding structure 311 includes a first part 3111 located on one side of the sealing ring 312 and a second part 3112 located on the other side of the sealing ring 312. The first part 3111 communicates with the first chamber 21, and the second part 3112 communicates with the second chamber 22.

[0039] When the first oil port 241 is on one side of the sealing ring 312, the first oil port 241 connects to the first part 3111, and then the first oil port 241 connects to the first chamber 21. When the second oil port 242 is on the other side of the sealing ring 312, the first oil port 241 connects to the second part 3112, and then the first oil port 241 connects to the second chamber 22.

[0040] In this embodiment, the oil passage 24 further includes a second oil port 242 and a third oil port 243. The first oil port 241 is located between the second oil port 242 and the third oil port 243. A first flow rate regulating valve 51 is provided at the second oil port 242, and a second flow rate regulating valve 52 is provided at the third oil port 243. The second oil port 242 is always connected to the first chamber 21, and the third oil port 243 is always connected to the second chamber 22.

[0041] When the first piston 31 presses the first elastic mechanism 41, the sealing ring 312 moves with the first piston 31, so that the first oil port 241 connects to the first chamber 21. The first piston 31 will compress the space of the second chamber 22. At this time, hydraulic oil will flow into the oil passage 24 from the third oil port 243, and then flow out from the first oil port 241 into the first part 3111 of the guide structure 311, and then flow into the first chamber 21. The flow rate of the hydraulic oil flowing into the oil passage 24 from the third oil port 243 can be controlled independently by the first flow rate regulating valve 51.

[0042] When the first piston 31 drives the first elastic mechanism 41 to move toward the rotating shaft 10, the sealing ring 312 moves with the first piston 31, so that the first oil port 241 connects to the second chamber 22. The first piston 31 will compress the space of the first chamber 21. At this time, hydraulic oil will flow from the second oil port 242 into the oil passage 24, and then flow out from the first oil port 241 into the second part 3112 of the guide structure 311, and then flow into the second chamber 22. The flow rate of the hydraulic oil flowing from the second oil port 242 into the oil passage 24 can be controlled independently by the second flow rate regulating valve 52.

[0043] In this embodiment, the position of the second oil port 242 corresponds to the first part 3111, and the position of the third oil port 243 corresponds to the second part 3112. When the first piston 31 moves, the position of the second oil port 242 can be directly opposite the first part 3111 and / or the position of the third oil port 243 can be directly opposite the second part 3112. During the movement of the first piston 31, the first piston 31 can also avoid blocking the second oil port 242 and the third oil port 243.

[0044] Continue reading Figure 1As shown, the floor spring may further include a horizontally arranged guide rod 60. The first piston 31 is provided with a first guide hole 301, and the second piston 32 is provided with a second guide hole (position opposite to the first guide hole 301, not shown). The guide rod 60 is laterally movably placed in the first guide hole 301 and the second guide hole. When the first piston 31 and the second piston 32 move, they will move laterally under the guidance of the guide rod 60 to prevent the first piston 31 and the second piston 32 from rotating circumferentially.

[0045] The first piston 31 is provided with a receiving groove 313, and a roller 61 that abuts against the first cam structure 11 is provided in the receiving groove 313. The first piston 31 is provided with a through hole 314 that connects the receiving groove 313 and the second chamber 22. The receiving groove 313 connects to the first chamber 21. When hydraulic oil passes through the receiving groove 313, it will lubricate the roller 61, thereby reducing the contact friction between the roller 61 and the first cam structure 11, which is beneficial to the rotation of the rotating shaft 10.

[0046] A valve ball 62 may be provided at the through hole 314 so that hydraulic oil can only flow from the first chamber 21 to the second chamber 22. When the first chamber 21 is squeezed, hydraulic oil enters the second chamber 22 through the through hole 314, and when the second chamber 22 is squeezed, the valve ball 62 closes the through hole 314.

[0047] In the specification and claims of this application, the terms "comprising / including" and "having / including" and variations thereof are used to specify the presence of the stated features, values, steps or components, but do not exclude the presence or addition of one or more other features, values, steps, components or combinations thereof.

[0048] Some features of this invention are described in different embodiments for clarity; however, these features may also be described in combination in a single embodiment. Conversely, some features of this invention are described only in a single embodiment for brevity; however, these features may also be described individually or in any suitable combination in different embodiments.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A floor spring, characterized in that, The floor spring includes: A rotating shaft, on which a first cam structure is provided; The housing is rotatably connected to the rotating shaft, and the housing is provided with an oil passage, the oil passage having a first oil port; A first elastic mechanism is disposed within the outer casing; The first piston is held against the first cam structure by the first elastic mechanism. The first piston has a transverse flow guide structure on its peripheral side. When the first piston moves, the position of the flow guide structure can be directly opposite the first oil port. The first piston is disposed in the housing such that the housing has a first chamber located on one side of the first piston and a second chamber located on the other side of the first piston. The flow guide structure connects the first chamber and / or the second chamber.

2. The floor spring according to claim 1, characterized in that, The flow guiding structure is the cross-section of the first piston.

3. The floor spring according to claim 1, characterized in that, The first piston is provided with a sealing ring. When the first piston moves, the first oil port can be located on one side of the sealing ring or on the other side of the sealing ring. The flow guiding structure includes a first part located on one side of the sealing ring and a second part located on the other side of the sealing ring. The first part is connected to the first chamber, and the second part is connected to the second chamber.

4. The floor spring according to claim 3, characterized in that, The oil circuit also has a second oil port and a third oil port. The first oil port is located between the second oil port and the third oil port. A first flow rate regulating valve is provided at the second oil port, and a second flow rate regulating valve is provided at the third oil port. The second oil port is always connected to the first chamber, and the third oil port is always connected to the second chamber.

5. The floor spring according to claim 4, characterized in that, The position of the second oil port corresponds to the first part, and the position of the third oil port corresponds to the second part. When the first piston moves, the position of the second oil port may be directly opposite the first part and / or the position of the third oil port may be directly opposite the second part.

6. The floor spring according to claim 1, characterized in that, The rotating shaft is provided with a second cam structure, and the floor spring further includes: A second elastic mechanism is disposed within the outer casing; The second piston is held against the second cam structure by the second elastic mechanism.

7. The floor spring according to claim 6, characterized in that, The first piston and the first elastic mechanism are located on one side of the rotating shaft, and the second piston and the second elastic mechanism are located on the other side of the rotating shaft.

8. The floor spring according to claim 7, characterized in that, The second elastic mechanism includes a first spring and a second spring, wherein the second spring is disposed within the first spring.

9. The floor spring according to claim 6, characterized in that, The floor spring also includes a horizontally arranged guide rod. The first piston has a first guide hole, and the second piston has a second guide hole. The guide rod is movably positioned in the first guide hole and the second guide hole.

10. The floor spring according to claim 6, characterized in that, The first piston is provided with a receiving groove, and a roller that abuts against the first cam structure is provided in the receiving groove. The first piston is provided with a through hole that connects the receiving groove and the second chamber, and the receiving groove connects to the first chamber.

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