Helical hydraulic damper

Abstract

The present invention relates to a helical hydraulic damper, solving the problem of the inconvenience in the use of existing washing machines caused by the need for manual support when closing a flip lid. The helical hydraulic damper comprises a shell and a rotary shaft, wherein one side of the shell is provided with a shell inner cavity, and the rotary shaft is rotatably connected to the shell inner cavity by means of a damping mechanism, the damping mechanism comprising an overflow pin, a blocking column, a one-way valve, a helical sliding block, and a spring. During use, a flip lid is in a closed state. When opening the flip lid upwards, the shell rotates and causes the helical sliding block to move towards the rotary shaft; under the action of the pressure of a damping fluid in a second cavity, the damping fluid in the second cavity impacts the one-way valve through an overflow hole, such that a gap is formed between the one-way valve and the helical sliding block, allowing the damping fluid to flow from the second cavity into a first cavity. When closing the flip lid, the damping fluid flows from the first cavity into the second cavity through the overflow gap, such that, under the damping effect of the damping fluid, the flip lid falls down slowly until completely closed, thus eliminating the need for manual support when closing the flip lid, while also avoiding producing impact sound.

Description

A spiral hydraulic damper Technical Field

[0001] The present invention relates to the field of mechanical equipment, and in particular to a spiral hydraulic damper. Background Art

[0002] When closing the flap of the existing flip-top washing machine, the user needs to hold the flap with his hands during the entire closing process. If the flap is not held by hand, the flap will fall down and make a loud noise, which is inconvenient to use. Technical issues

[0003] The purpose of the present invention is to solve the problem that the conventional washing machine has the inconvenience of having to hold the cover with hands during the closing process. Technical Solutions

[0004] The technical solution adopted to solve the technical problem proposed by the present invention is as follows: the spiral hydraulic damper of the present invention includes a shell and a rotating shaft rotatably connected to the shell, a shell inner cavity is provided on one side of the shell, the rotating shaft is rotatably connected to the shell inner cavity through a damping mechanism, the damping mechanism includes a blocking column, a one-way valve, a spiral slider and a spring, the rotating shaft extends into the shell inner cavity, the outer edge of the rotating shaft is sealed with the shell inner cavity, a sealed cavity is formed between the rotating shaft and the shell inner cavity, the spiral slider is axially slidably connected to the rotating shaft, and the spiral slider sleeve Connected to the rotating shaft, the inner cavity of the shell is spirally connected to the spiral slider, the spiral slider divides the sealed cavity into a first cavity and a second cavity, the second cavity is close to the rotating shaft, the first cavity and the second cavity are provided with damping fluid, the spiral slider is provided with an overflow hole connecting the first cavity and the second cavity, the spring drives the one-way valve to push the one-way valve to block the overflow hole; the middle part of the rotating shaft is provided with a rotating shaft through hole connecting the first cavity and the second cavity, the blocking column is provided in the rotating shaft through hole, and an overflow gap connecting the first cavity and the second cavity is formed between the blocking column and the rotating shaft through hole.

[0005] The technical solutions that further limit the present invention include:

[0006] A threaded column is connected to the blocking column, and an internal threaded hole that cooperates with the threaded column is provided on the shaft through hole. The outer surface of the blocking column is a cone that gradually becomes larger toward the threaded column. The blocking column and the threaded column form a regulating valve.

[0007] One end of the threaded column is provided with an adjustment hole for inserting a screwdriver.

[0008] A sealing column is provided at one end of the threaded column, a first sealing ring is provided on the sealing column, and the regulating valve is sealed and connected to the rotating shaft through hole via the first sealing ring.

[0009] A positioning shaft is provided in the inner cavity of the shell corresponding to the rotating shaft, and the positioning shaft is located in the through hole of the rotating shaft.

[0010] An overflow needle is provided in the rotating shaft through hole, and an overflow gap is formed between the overflow needle and the rotating shaft through hole.

[0011] A cross positioning shaft is provided on the rotating shaft, and a cross positioning hole matched with the cross positioning shaft is provided in the spiral sliding block.

[0012] A circular positioning shaft is provided on the rotating shaft, the one-way valve is slidably provided on the circular positioning shaft, the spring is sleeved on the one-way valve, and a stopper is provided on the one-way valve, one side of the stopper is connected to the overflow hole, and the other side of the stopper is connected to one end of the spring, and the other end of the spring abuts against the bottom of the inner cavity of the shell.

[0013] The spiral slider is movably connected to the inner cavity of the shell through a second sealing ring.

[0014] The damper further comprises a cover plate for blocking the rotating shaft in the inner cavity of the shell. The cover plate is fixedly connected to the shell. The rotating shaft and the inner cavity of the shell are sealed via a third sealing ring. Beneficial effects

[0015] Through the above technical scheme, the beneficial effects of the present invention are as follows: when the spiral hydraulic damper of the present invention is in use, the flip cover is in a closed state. When the flip cover is opened upward, the outer shell rotates to move the spiral slider in the direction of the rotating shaft, the first cavity becomes larger, and the second cavity becomes smaller. Under the action of the damping liquid pressure in the second cavity, the damping liquid in the second cavity impacts the one-way valve through the overflow hole to create a gap between the one-way valve and the spiral slider, and the damping liquid in the second cavity flows into the first cavity; when closed, under the action of the gravity of the flip cover, the flip cover drives the outer shell to rotate and close. At this time, the damping liquid pressure in the first cavity is greater than the damping liquid pressure in the second cavity. Therefore, under the action of the spring, the one-way valve blocks the overflow hole. At this time, the damping liquid in the first cavity flows into the second cavity through the overflow gap. Therefore, under the damping action of the damping liquid, the flip cover slowly falls until it is completely closed, so that there is no need to hold it with hands during the closing process and no impact sound will be emitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the three-dimensional structure of a spiral hydraulic damper of the present invention.

[0017] FIG2 is a schematic diagram of the explosion structure of a spiral hydraulic damper of the present invention.

[0018] FIG3 is a schematic cross-sectional view of the closed spiral hydraulic damper of the present invention.

[0019] FIG4 is a schematic structural diagram of a spiral hydraulic damper of the present invention when it is opened to a certain angle (not the maximum).

[0020] FIG5 is a schematic structural diagram of a spiral hydraulic damper of the present invention when it is opened to the maximum angle. Best Mode for Carrying Out the Invention

[0021] The structure of the present invention is further described below with reference to the accompanying drawings.

[0022] 1 to 5, a spiral hydraulic damper includes a shell 1 and a rotating shaft 2 rotatably connected to the shell. A shell inner cavity 11 is provided on one side of the shell. The rotating shaft is rotatably connected to the shell inner cavity through a damping mechanism 3. The damping mechanism 3 includes a blocking column 32, a one-way valve 33, a spiral slider 34 and a spring 35. The rotating shaft extends into the shell inner cavity. The outer edge of the rotating shaft is sealed with the shell inner cavity. A sealed cavity is formed between the rotating shaft and the shell inner cavity. The spiral slider is axially slidably connected to the rotating shaft. The spiral slider is sleeved on the rotating shaft. The shell inner cavity and the spiral slider are connected. The sliding block is spirally connected, and the spiral slider divides the sealing cavity into a first cavity 4 and a second cavity 5. The second cavity is close to the direction of the rotating shaft. Damping fluid is provided in the first cavity and the second cavity. The first cavity and the second cavity are connected through an overflow hole 35 provided on the spiral slider 34. The spring drives the one-way valve to push the one-way valve to block the overflow hole; a rotating shaft through hole 21 connecting the first cavity and the second cavity is provided in the middle of the rotating shaft 2, and a blocking column is provided in the rotating shaft through hole. An overflow gap 36 connecting the first cavity and the second cavity is formed between the blocking column and the rotating shaft through hole. When in use, when the flip cover is closed and the cover is opened upward, the outer shell rotates, causing the spiral slider to move toward the axis of rotation, expanding the first chamber and shrinking the second chamber. Under the pressure of the damping fluid in the second chamber, the damping fluid in the second chamber impacts the one-way valve through the overflow hole, creating a gap between the one-way valve and the spiral slider, allowing the damping fluid in the second chamber to flow into the first chamber. When the cover is opened to its maximum angle, most of the damping fluid in the second chamber flows into the first chamber. At this point, the pressure of the damping fluid in the first chamber is greater than that in the second chamber, and the spring acts to block the overflow hole in the one-way valve. When closed, under the weight of the cover, the outer shell rotates closed. At this point, the pressure of the damping fluid in the first chamber is greater than that in the second chamber, causing the damping fluid in the first chamber to flow into the second chamber through the overflow gap. As a result, the cover slowly descends under the damping effect of the damping fluid until it is fully closed, eliminating the need for manual support during closing and preventing any audible impact. The direction of the arrow in the figure is the flow direction of the damping fluid.

[0023] In this embodiment, a threaded column 37 is connected to the blocking column 32, and an internal threaded hole that cooperates with the threaded column is provided on the rotating shaft through hole. The outer surface of the blocking column is a cone 321 that gradually becomes larger toward the threaded column, and the blocking column and the threaded column form a regulating valve. An adjusting hole 38 for inserting a screwdriver is provided at one end of the threaded column. The size of the gap between the blocking column and the rotating shaft through hole is adjusted through the adjusting hole, and the flow rate of the damping fluid is adjusted, thereby adjusting the speed at which the flip cover falls, and can also be adjusted according to the weight of the flip cover. In this embodiment, a sealing column 39 is provided at one end of the threaded column, and a first sealing ring 391 is provided on the sealing column. The regulating valve is sealed and connected to the rotating shaft through hole through the first sealing ring. Therefore, when adjusting the threaded column, the sealing of the second cavity is maintained.

[0024] In this embodiment, a positioning shaft 12 is provided in the housing cavity 11 corresponding to the rotating shaft. The positioning shaft is located in the rotating shaft through hole. One end of the rotating shaft is positioned by the positioning shaft, and the other end is positioned by the housing cavity, thereby maintaining stable rotation of the rotating shaft.

[0025] In this embodiment, an overflow needle 31 is provided within the shaft through-hole, forming an overflow gap between the overflow needle and the shaft through-hole. The overflow needle further regulates the flow rate of the damping fluid between the first and second cavities. As the damping fluid flows between the first and second cavities, the overflow needle moves back and forth within the shaft through-hole, regulating the overflow rate while also clearing the overflow gap and preventing blockage.

[0026] In this embodiment, a cross positioning shaft 22 is provided on the rotating shaft 2, and a cross positioning hole 341 is provided in the spiral slider 34 to cooperate with the cross positioning shaft. The cross positioning shaft ensures that the spiral slider can slide stably along the axial direction.

[0027] In this embodiment, a circular positioning shaft 23 is provided on the rotating shaft 2, and a one-way valve 33 is slidably mounted on the circular positioning shaft. A spring is sleeved on the one-way valve. A stopper 331 is provided on the one-way valve 33. One side of the stopper is connected to the overflow hole, and the other side of the stopper is connected to one end of the spring, which abuts the bottom of the inner cavity of the housing. The spring drives the one-way valve to abut against the spiral slider, thereby blocking the overflow hole on the spiral slider. When the pressure of the damping fluid in the second chamber exceeds the elastic force of the spring, the damping fluid in the second chamber pushes the one-way valve open, and the damping fluid flows from the overflow hole to the first chamber.

[0028] In this embodiment, the spiral slider is sealed and movably connected to the inner cavity of the housing via a second sealing ring 6. The spiral slider is provided with a second sealing ring groove, in which the second sealing ring is located. The spiral slider maintains a sealed state with the inner wall of the inner cavity of the housing during the spiral rotation process.

[0029] In this embodiment, the damper further includes a cover plate 7 for retaining the rotating shaft within the inner cavity of the housing. The cover plate is fixedly connected to the housing, and the rotating shaft and the inner cavity of the housing are sealed by a third sealing ring 8. The cover plate is fixedly connected to the housing by screws, and the cover plate retains the rotating shaft within the inner cavity of the housing.

[0030] In this embodiment, the housing 1 is provided with a mounting portion 13, and the mounting portion is provided with a mounting hole 14. The mounting portion can be a connecting plate, and the flip cover is pressed on the connecting plate through the mounting hole for easy installation.

[0031] Although the specific embodiments of the present invention are described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of the present invention. Various modifications and variations that can be made by those skilled in the art without creative effort within the scope described in the claims still fall within the scope of protection of the present invention.

Claims

1. A spiral hydraulic damper, comprising a housing and a rotating shaft rotatably connected to the housing, characterized in that: A shell cavity is provided on one side of the shell, and the rotating shaft is rotatably connected with the shell cavity through a damping mechanism. The damping mechanism includes a blocking column, a one-way valve, a spiral slider and a spring. The rotating shaft extends into the shell cavity, and the outer edge of the rotating shaft is sealed with the shell cavity. A sealed cavity is formed between the rotating shaft and the shell cavity. The spiral slider is axially slidably connected with the rotating shaft, and the spiral slider is sleeved on the rotating shaft. The shell cavity and the spiral slider are spirally connected. The spiral slider divides the sealed cavity into a first cavity and a second cavity. The second cavity is close to the rotating shaft direction. Damping fluid is provided in the first cavity and the second cavity. An overflow hole connecting the first cavity and the second cavity is provided on the spiral slider. The spring drives the one-way valve to push the one-way valve to block the overflow hole. A rotating shaft through hole connecting the first cavity and the second cavity is provided in the middle part of the rotating shaft. The blocking column is provided in the rotating shaft through hole, and an overflow gap connecting the first cavity and the second cavity is formed between the blocking column and the rotating shaft through hole.

2. A spiral hydraulic damper according to claim 1, characterized in that: A threaded column is connected to the blocking column, an internal threaded hole matching the threaded column is provided on the shaft through hole, the outer surface of the blocking column is a cone that gradually increases toward the threaded column, and the blocking column and the threaded column form a regulating valve.

3. A spiral hydraulic damper as claimed in claim 2, characterized in that: One end of the threaded column is provided with an adjustment hole for inserting a screwdriver.

4. A spiral hydraulic damper as claimed in claim 2, characterized in that: A sealing column is arranged at one end of the threaded column, a first sealing ring is arranged on the sealing column, and the regulating valve is sealedly connected to the rotating shaft through hole via the first sealing ring.

5. A spiral hydraulic damper according to claim 1, characterized in that: A positioning shaft is provided in the inner cavity of the shell corresponding to the rotating shaft, and the positioning shaft is located in the through hole of the rotating shaft.

6. A spiral hydraulic damper as claimed in claim 5, characterized in that: An overflow needle is arranged in the rotating shaft through hole, and an overflow gap is formed between the overflow needle and the rotating shaft through hole.

7. A spiral hydraulic damper according to claim 1, characterized in that: A cross positioning shaft is arranged on the rotating shaft, and a cross positioning hole matching with the cross positioning shaft is arranged in the spiral sliding block.

8. A spiral hydraulic damper according to claim 1, characterized in that: The rotating shaft is provided with a circular positioning shaft, the one-way valve is slidably arranged on the circular positioning shaft, the spring is sleeved on the one-way valve, and the one-way valve is provided with a stopper, one side of the stopper is connected to the overflow hole, the other side of the stopper is connected to one end of the spring, and the other end of the spring abuts against the bottom of the inner cavity of the shell.

9. A spiral hydraulic damper according to claim 1, characterized in that: The spiral slider is movably connected to the inner cavity of the shell through a second sealing ring.

10. A spiral hydraulic damper according to claim 1, characterized in that: The damper also includes a cover plate for blocking the rotating shaft in the inner cavity of the shell, the cover plate is fixedly connected to the shell, and the rotating shaft and the inner cavity of the shell are sealed by a third sealing ring.

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