A rotary damper and toilet seat assembly

Abstract

The utility model relates to a kind of rotary damper and closestool cover plate assembly, it includes: shaft sleeve, is equipped with inner cavity, two oil separation ribs are symmetrically equipped on the inner cavity wall, two the oil separation rib divide the inner cavity into two damping cavities, the bottom surface of the two damping cavities is equipped with oil discharge groove respectively, at least one strip protrusion is equipped in each the oil discharge groove;Rotary shaft, rotary insertion the inner cavity of the shaft sleeve, two groups of flaps are symmetrically equipped on the outer circumferential wall of the rotary shaft;Two valve sheets, respectively movably between each group the flap with the inner cavity wall, and transverse oil passage hole is opened in the valve sheet;Sealing element, it is set in the bottom of the shaft sleeve, and between the bottom of the shaft sleeve form oil storage cavity, and between the bottom of each the damping cavity and the oil storage cavity form oil passage channel.The utility model makes closestool cover plate rotation process without abnormal sound, slow descent process is stable without shaking.

Description

Technical Field

[0001] This utility model relates to a rotary damper and a toilet seat assembly. More specifically, it relates to a rotary damper for connecting a toilet seat and a toilet seat assembly including the rotary damper. Background Technology

[0002] Existing rotary dampers for connecting toilet seats are mainly formed by a sealed assembly of a bushing, a rotating shaft, and a valve plate. After assembly, the rotary damper forms at least two damping cavities between the bushing, rotating shaft, and valve plate, each filled with damping oil. When the toilet seat rotates and falls, it synchronously drives the rotating shaft to rotate, which in turn causes the valve plate to swing and agitate the damping oil. When the valve plate swings, it squeezes the damping oil in one damping cavity, forcing it to flow into the other damping cavity through a narrow oil passage. Due to the flow-limiting effect of the narrow oil passage and the high viscosity of the damping oil, the damping oil generates continuous and stable viscous resistance during flow. This viscous resistance acts in reverse on the valve plate and rotating shaft, thus hindering the rotation of the rotating shaft and achieving the slow closure of the toilet seat.

[0003] However, in existing rotary dampers, air bubbles are introduced into the damping oil during assembly, forming air bubbles. Even after assembly, these bubbles remain in the damping oil and cannot be eliminated, resulting in an uneven and unsmooth toilet seat closure. When the rotary damper acts on the toilet seat, the rotating shaft drives the valve plate to swing, disturbing the damping oil and causing it to flow. During this flow, air bubbles rub against the damping oil, the valve plate, or the damping cavity wall, producing abnormal noise. Furthermore, as the toilet seat rotates and falls, the damping oil flows through a narrow oil passage. Air bubbles undergo drastic compression or expansion due to pressure changes within the passage, causing sudden changes in the flow pressure of the damping oil. This disrupts the continuous and stable viscous resistance during the oil's flow, and this unstable resistance is transmitted to the rotating shaft, resulting in the toilet seat shaking. Utility Model Content

[0004] The purpose of this invention is to provide a rotary damper to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0006] On the one hand, this utility model provides a rotary damper, which includes: The bushing has an inner cavity, and two oil-separating ribs are symmetrically arranged on the inner cavity wall. The two oil-separating ribs divide the inner cavity into two damping cavities. The bottom surface of the two damping cavities is provided with an oil unloading groove, and each oil unloading groove is provided with at least one strip-shaped protrusion. A rotating shaft is inserted into the inner cavity of the bushing. Two sets of winglets are symmetrically arranged on the outer peripheral sidewall of the rotating shaft. Two valve plates are respectively movably disposed between each set of the wing plates and the inner cavity wall, and the valve plates are provided with transverse oil passage holes; A sealing element is disposed at the bottom of the bushing and forms an oil reservoir between the sealing element and the bottom of the bushing, and an oil passage is formed between the bottom of each damping cavity and the oil reservoir.

[0007] In some embodiments of this application, one end of the strip-shaped protrusion has a cutting edge, and the cutting edge has a wedge-shaped bevel.

[0008] In some embodiments of this application, each of the oil unloading grooves originates from an oil-separating rib and extends circumferentially along the axis of rotation; one end of the strip-shaped protrusion having a blade portion is close to an oil-separating rib, and the other end of the strip-shaped protrusion is located at the end of the oil unloading groove away from the oil-separating rib.

[0009] In some embodiments of this application, the width of the strip-shaped protrusion is smaller than the width of the unloading groove, and the top of the strip-shaped protrusion is lower than the bottom of the wing.

[0010] In some embodiments of this application, the bottom surface of the inner cavity of the bushing is provided with a through hole, and the bottom of the rotating shaft is rotatably inserted into the through hole; there are four oil passages, which are distributed around the outer periphery of the through hole and connected to the through hole, and the four oil passages are respectively located on both sides of the two oil-separating ribs.

[0011] In some embodiments of this application, the rotating shaft includes a connecting part and a spindle. The connecting part is used to connect an external driving device to drive the rotating shaft to rotate. The spindle is provided with a journal and two sets of blades symmetrically arranged around the journal. The journal is inserted into the through hole.

[0012] In some embodiments of this application, the rotating shaft further includes a collar, which is disposed at the connection between the mandrel and the connecting portion; the surface of the collar facing the mandrel has two circumferentially extending flow grooves.

[0013] In some embodiments of this application, each set of fins includes two fins, and each set of fins consists of one thick fin and one thin fin, with the valve plate movement limited between each set of fins and the inner cavity wall.

[0014] In some embodiments of this application, the outer peripheral edges of the first and second outer peripheral walls at the same height are respectively arc-shaped edges, and the radii of the two arc-shaped edges gradually decrease along opposite circumferential directions.

[0015] On the other hand, this solution provides a toilet seat assembly, including the rotary damper described in the above embodiments.

[0016] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects: This invention relates to a rotary damper, in which at least one strip-shaped protrusion is provided on the bottom surface of each of the two damping cavities of the bushing, and an oil passage is provided connecting the damping cavities and the oil storage cavity. When the damping oil flows through the oil discharge groove, the strip-shaped protrusions cut the flowing damping oil, thereby cutting the air bubbles present in the damping oil and decomposing the air bubbles into tiny air bubble clusters. The impact of these tiny air bubble clusters on the stability of the oil flow is greatly reduced, and they can be gradually discharged from the sealing joint of the rotary damper over time. Therefore, when the toilet seat rotates and falls, the abnormal noise caused by the presence of air bubbles in the damping oil during flow is reduced or eliminated; and the pressure of the damping oil does not change significantly when passing through the narrow oil passage, thus ensuring a smooth and vibration-free descent of the toilet seat during slow descent. Attached Figure Description

[0017] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein: Figure 1 This is an exploded structural diagram of the rotary damper of this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the bushing of this utility model.

[0019] Figure 3 This is a cross-sectional structural diagram of the bushing of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the rotating shaft of this utility model.

[0021] Figure 5 This is a cross-sectional view of the bushing, adjusting nut, and second sealing ring of this utility model.

[0022] Figure 6 This is a cross-sectional structural diagram of the rotary damper vane of this utility model sliding over the oil unloading groove.

[0023] Figure 7 This is a cross-sectional view of the undamped state of the rotary damper of this utility model.

[0024] Figure 8 This is a cross-sectional view of the rotating damper of this utility model under damping conditions.

[0025] Figure 9 This is a cross-sectional view of the structure of the rotary damper of this utility model in the undamped adjustment state.

[0026] Figure 10 This is a cross-sectional view of the rotary damper of this utility model under damping adjustment state.

[0027] The annotations in the attached figures are explained as follows: 10. Bushing; 11. Inner cavity; 111. Damping cavity; 12. Oil separator rib; 13. Strip-shaped protrusion; 131. Cutting edge; 14. Oil reservoir; 15. Oil passage; 16. Oil discharge groove; 17. Through hole; 20. Shaft; 21. Connecting part; 22. Mandrel; 23. Journal; 231. First outer peripheral wall; 232. Second outer peripheral wall; 24. Blade; 241. Thick blade; 242. Thin blade; 25. Collar; 251. Flow groove; 30. Valve plate; 301. Transverse oil passage hole; 40. Sealing element; 401. Annular sealing groove; 50. Capping; 60. Metal gasket; 70. First sealing ring; 80. Second sealing ring. Detailed Implementation

[0028] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0029] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0030] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0031] Example 1 Please see Figures 1 to 5The rotary damper provided in one embodiment of this utility model mainly includes: bushing 10, rotating shaft 20, valve plate 30 and sealing element 40.

[0032] The bushing 10 is provided with an inner cavity 11 for filling damping oil. Two oil-separating ribs 12 are symmetrically provided on the inner cavity wall, and the oil-separating ribs 12 divide the inner cavity 11 into two damping cavities 111. The bottom surface of the two damping cavities 111 is provided with an oil discharge groove 16, and each oil discharge groove 16 is provided with at least one strip-shaped protrusion 13.

[0033] The rotating shaft 20 is rotatably inserted into the inner cavity 11 of the bushing 10 and sealed with the bushing 10. Two sets of winglets 24 are symmetrically arranged on the outer peripheral sidewall of the rotating shaft 20.

[0034] The valve plate 30 is movably disposed between the rotating shaft 20 and the inner cavity wall, and the valve plate 30 is provided with a transverse oil passage hole 301.

[0035] A sealing element 40 is disposed at the bottom of the bushing 10 and forms an oil storage cavity 14 between the sealing element 40 and the bottom of the bushing 10; wherein, an oil passage 15 is connected between the bottom of each damping cavity 111 and the oil storage cavity 14.

[0036] The rotary damper of this invention has at least one strip-shaped protrusion 13 on the bottom surface of each of the two damping cavities 111 of the bushing 10. An oil passage 15 connects the damping cavities 111 and the oil storage cavity 14. When the damping oil flows through the oil discharge groove 16, the strip-shaped protrusion 13 cuts the flowing damping oil, thereby cutting the air bubbles present in the damping oil and decomposing them into tiny bubble clusters. The impact of these tiny bubble clusters on the stability of the oil flow is significantly reduced, and they can be gradually discharged from the sealing joint of the rotary damper over time. Therefore, when the toilet seat rotates and falls, the abnormal noise generated by the damping oil during flow can be reduced or eliminated. The pressure of the damping oil does not change significantly when passing through the narrow oil passage 15, thus ensuring a smooth and vibration-free descent of the toilet seat during slow descent.

[0037] Please see Figure 3 In a preferred embodiment, the unloading groove 16 is provided with an integrally formed arc-shaped strip protrusion 13. One end of the protrusion is machined with a cutting edge 131, which is formed by a wedge-shaped inclined surface. Thus, when the damping oil flows through the unloading groove 16, the cutting edge 131 can effectively cut and destroy air bubbles in the oil, thereby achieving the purpose of defoaming. Specifically, the wedge-shaped inclined surface is located on the top surface of one end of the strip protrusion 13; viewed from its side, the contour of the top of the cutting edge 131 gradually tapers towards the bottom to form the wedge-shaped inclined surface.

[0038] In a preferred embodiment, the oil unloading groove 16 is an arc-shaped groove, each of the oil unloading grooves 16 originating from one oil-separating rib 12 and extending circumferentially towards another oil-separating rib 12 along the rotating shaft 20; one end of the strip-shaped protrusion 13 with a cutting edge is close to one oil-separating rib 12, and the other end of the strip-shaped protrusion 13 is located at the end of the oil unloading groove 16 away from the oil-separating rib 12. During the rotation of the rotating shaft 20, the oil unloading groove 16 provides a low-damping oil passage path for the damping oil.

[0039] Please see Figure 3 , Figure 6 In a preferred embodiment, the width of the strip-shaped protrusion 13 is smaller than the width of the oil unloading groove 16, and the top of the strip-shaped protrusion 13 is lower than the bottom of the wing 24. Because the top of the strip-shaped protrusion 13 is lower than the bottom of the wing 24, the strip-shaped protrusion 13 does not contact the wing 24 during the rotation of the wing 24 driven by the rotating shaft 20. This avoids wear or damage caused by collision between the strip-shaped protrusion 13 and the wing 24, ensuring the structural integrity of the strip-shaped protrusion 13 and the wing 24.

[0040] Please see Figures 1 to 3 In a preferred embodiment, the bottom surface of the inner cavity 11 of the bushing 10 is provided with a through hole 17, and the bottom of the rotating shaft 20 is rotatably inserted into the through hole 17; there are four oil passages 15, which are distributed around the outer periphery of the through hole 17 and connected to the through hole 17, and the oil passages 15 are respectively located on both sides of the two oil-separating ribs 12.

[0041] Please see Figures 1 to 4 In a preferred embodiment, the rotating shaft 20 includes a connecting part 21 and a spindle 22. The connecting part 21 is used to connect an external driving device to drive the rotating shaft 20 to rotate. The spindle 22 is provided with a journal 23 and two sets of blades 24 symmetrically arranged around the journal 23. The journal 23 is inserted into the through hole 17.

[0042] Please see Figure 1 , Figure 3 and Figure 4 In a preferred embodiment, the rotating shaft 20 further includes a collar 25, which is disposed at the connection between the connecting part 21 and the spindle 22; the surface of the collar 25 facing the spindle 22 is provided with a flow groove 251, and the surface of the collar 25 facing the spindle 22 is in sliding engagement with the oil separator 12.

[0043] Please see Figure 4In a preferred embodiment, each set of winglets 24 includes two winglets 24, and each set of winglets 24 consists of a thick winglet 241 and a thin winglet 242. The valve plate 30 is movable and limited between the gap between each set of winglets 24 and between the thin winglet 242 and the inner cavity wall.

[0044] Please see Figure 4 , Figure 7 and Figure 8 In a preferred embodiment, two sets of blades 24 divide the outer peripheral wall of the journal 23 into a first outer peripheral wall 231 and a second outer peripheral wall 232 along the axial direction of the journal 23. The outer peripheral edges of the first outer peripheral wall 231 and the second outer peripheral wall 232 at the same height are two arc-shaped edges, and the radii of the two arc-shaped edges gradually decrease along opposite circumferential directions. Therefore, the overlap between the journal 23 and the through hole 17 in the longitudinal direction gradually changes as the shaft 20 rotates, thereby controlling the gradual change in the size of the remaining flow area of ​​the oil passage 15 after it is blocked by the first outer peripheral wall 231 and the second outer peripheral wall 232, thus changing the magnitude of the damping force.

[0045] Please see Figures 1 to 3 In a preferred embodiment, a pressure cap 50 is fixed at the opening of the inner cavity 11 at the top of the bushing 10. A metal gasket 60 is provided between the pressure cap 50 and the collar 25, and a first sealing ring 70 is provided between the pressure cap 50 and the metal gasket 60. By providing the pressure cap 50 and the metal gasket 60, a sealing fit is formed between them and the collar 25. Furthermore, by providing the first sealing ring 70 between the pressure cap 50 and the metal gasket 60, the sealing effect between the pressure cap 50, the metal gasket 60, and the collar 25 is significantly enhanced, further preventing the damping oil from leaking along the axial direction of the rotating shaft 20 to the connecting part 21.

[0046] Please see Figure 1 , Figure 5 In a preferred embodiment, the seal 40 is provided with an annular sealing groove 401, and a second sealing ring 80 is fitted inside the annular sealing groove 401 to seal the mating interface between the seal 40 and the bushing 10. When the second sealing ring 80 is compressed by the seal 40 and the bushing 10, it can tightly fit the mating interface, preventing damping oil from leaking outwards from the mating interface and ensuring good sealing performance of the rotary damper of this invention even when the oil reservoir 14 is adjusted by the seal 40.

[0047] Please see Figure 9 , Figure 10In this embodiment, the sealing element 40 is an adjusting screw. By rotating the adjusting screw in one direction, the size of the oil storage chamber 14 can be changed, thereby adjusting the flow rate of the damping oil from the narrow oil passage 15 through the oil storage chamber 14 from one damping chamber 111 to another, thus changing the damping force of the damping oil on the thick wing 241, thereby changing the rotation speed of the rotating shaft 20, that is, changing the rotation speed of the toilet seat.

[0048] Example 2 Another embodiment of this utility model provides a toilet seat assembly (not shown in the figure), which includes the rotary damper described in the above embodiment.

[0049] The working principle of the rotary damper of this utility model is explained below.

[0050] Please see Figures 1 to 4 , Figure 7 During the process of lifting the toilet seat, the lifting of the toilet seat drives the rotating shaft 20 to rotate, causing the valve plate 30 to swing and open the transverse oil passage 301. The vane 24 on the rotating shaft 20 gradually slides over the oil discharge groove 16. At the same time, the remaining flow area of ​​the oil passage 15 after being blocked by the first outer peripheral wall 231 and the second outer peripheral wall 232 gradually increases, making the oil passage 15 a spacious flow space. At this time, the damping oil flows into the oil discharge groove 16 through the transverse oil passage 301 in a damping cavity 111, and then flows into the oil storage cavity 14 through the spacious oil passage 15, and then into another damping cavity 111. Because the oil passage 15 is spacious during the toilet lifting process, the damping oil flows quickly without stagnation. Air bubbles in the damping oil travel rapidly from one damping chamber 111 to another through the oil discharge groove 16, the oil passage 15, and the oil storage chamber 14. Some air bubbles in the damping oil contact and are cut by the strip-shaped protrusions 13 in the oil discharge groove 16. During this process, the hydraulic resistance of the damping oil is extremely low, and the rotary damper generates virtually no resistance to rotation, remaining in an undamped state, thus enabling the toilet seat to lift quickly.

[0051] During the first half of the toilet seat closing process, the closing of the toilet seat causes the rotating shaft 20 to rotate in the opposite direction. The oil passage 15 still maintains a large flow space, and the transverse oil passage 301 of the valve plate 30 is in the open state, so the damping oil flows smoothly. At this time, the hydraulic resistance of the damping oil is very small, and the rotary damper as a whole is still in an undamped state.

[0052] Please see Figures 1 to 4 , Figure 8During the second half of the toilet seat closure, the pivot 20 continues to rotate in the opposite direction. The vane 24 on the pivot 20 slides over the oil discharge groove 16. At this time, the remaining flow area of ​​the oil passage 15 is minimized after being blocked by the first outer peripheral wall 231 and the second outer peripheral wall 232, leaving only a tiny gap to form a narrow oil passage 15. The narrow oil passage 15 creates a throttling effect on the damping oil, generating a damping force, which causes a pressure difference on both sides of the valve plate 30. Under the action of the pressure difference, the valve plate 30 swings until it contacts the thick vane 241 and closes the transverse oil passage 301. At this time, the damping oil only slowly passes through the oil discharge groove 16 and flows into the oil storage chamber 14 through the narrow oil passage 15, thus slowly flowing from one damping chamber 111 to another damping chamber 111. When the damping oil flows into another damping chamber 111, it passes through the oil discharge groove 16 and comes into full contact with the cutting edge 131 of the strip-shaped protrusion 13 in the oil discharge groove 16. The air bubbles in the damping oil are cut and decomposed into tiny air bubble clusters, which are gradually discharged from the seal of the rotary damper of this utility model over time. Due to the size limitation of the oil passage 15 and the cutting of air bubbles in the damping oil, the hydraulic resistance of the damping oil is large and stable. The rotary damper is in a damped state, generating a large and stable resistance to the rotation of the toilet seat, thereby achieving a smooth, quiet, and vibration-free slow descent of the toilet seat during the second half of its closure.

[0053] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A rotating damper, characterized in that, include: The bushing has an inner cavity, and two oil-separating ribs are symmetrically arranged on the inner cavity wall. The two oil-separating ribs divide the inner cavity into two damping cavities. The bottom surface of the two damping cavities is provided with an oil unloading groove, and each oil unloading groove is provided with at least one strip-shaped protrusion. A rotating shaft is inserted into the inner cavity of the bushing. Two sets of winglets are symmetrically arranged on the outer peripheral sidewall of the rotating shaft. Two valve plates are respectively movably disposed between each set of the wing plates and the inner cavity wall, and the valve plates are provided with transverse oil passage holes; A sealing element is disposed at the bottom of the bushing and forms an oil reservoir between the sealing element and the bottom of the bushing, and an oil passage is formed between the bottom of each damping cavity and the oil reservoir.

2. The rotary damper according to claim 1, characterized in that, One end of the strip-shaped protrusion has a cutting edge, and the cutting edge has a wedge-shaped bevel.

3. The rotary damper according to claim 1, characterized in that, Each of the aforementioned oil unloading grooves originates from an oil-separating rib and extends circumferentially along the axis of rotation; one end of the strip-shaped protrusion with a blade is close to an oil-separating rib, and the other end of the strip-shaped protrusion is located at the end of the oil unloading groove away from the oil-separating rib.

4. The rotary damper according to claim 3, characterized in that, The width of the strip-shaped protrusion is less than the width of the oil unloading groove, and the top of the strip-shaped protrusion is lower than the bottom of the wing.

5. The rotary damper according to claim 1, characterized in that, The bottom surface of the inner cavity of the bushing is provided with a through hole, and the bottom of the rotating shaft is rotatably inserted into the through hole; there are four oil passages, which are distributed around the outer periphery of the through hole and connected to the through hole, and the four oil passages are respectively located on both sides of the two oil-separating ribs.

6. The rotary damper according to claim 5, characterized in that, The rotating shaft includes a connecting part and a spindle. The connecting part is used to connect an external drive device to drive the rotating shaft to rotate. The spindle is provided with a journal and two sets of blades symmetrically arranged in the axial direction of the journal. The journal is inserted into the through hole.

7. The rotary damper according to claim 6, characterized in that, The rotating shaft also includes a collar, which is located at the connection between the mandrel and the connecting part; the surface of the collar facing the mandrel has two circumferentially extending flow grooves.

8. The rotary damper according to claim 6, characterized in that, Each set of vanes includes two vanes, and each set of vanes consists of one thick vane and one thin vane. The valve movement limit is located between each set of vanes and the inner cavity wall.

9. The rotary damper according to claim 8, characterized in that, Two sets of blades divide the outer peripheral wall of the journal into a first outer peripheral wall and a second outer peripheral wall along the axial direction of the journal. The outer peripheral edges of the first and second outer peripheral walls at the same height are respectively arc-shaped, and the radii of the two arc-shaped edges gradually decrease along opposite circumferential directions.

10. A toilet seat assembly, characterized in that, Includes the rotary damper as described in any one of claims 1-9.

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