Liquid damper

Abstract

The utility model discloses a liquid damper which comprises a shell, a shaft and an elastic piece, the shell is provided with a containing cavity, liquid can be loaded in the containing cavity, the shaft is arranged on the containing cavity, the shaft and the shell can rotate relatively, one end of the shaft is provided with a shaft head, the shaft head is exposed out of the shell, the inner wall of the containing cavity is provided with an inner rib, the inner rib can abut against the side portion of the shaft, and the elastic piece is arranged in the containing cavity. The shaft is provided with an outer rib, the containing cavity is provided with a first cavity and a second cavity on the two sides of the outer rib respectively, the outer rib is provided with a plurality of through holes, the first cavity and the second cavity can be communicated through the through holes, the through holes are divided into normally-open through holes and normally-closed through holes, and the elastic piece is connected to one side of the outer rib and can cover one side of the normally-closed through holes. Parts such as a one-way valve do not need to be used, the number of the parts is small, cost is low, assembly difficulty is low, precision is high, working stability is good, and different damping effects can be generated along with relative rotation of the shell and the shaft in different directions so as to meet different use requirements.

Description

Technical Field

[0001] The utility model relates to the field of damper design, in particular to a liquid damper. Background Art

[0002] A damper is a device that provides resistance to motion and dissipates kinetic energy. Dampers are often divided into liquid dampers, gas dampers, electromagnetic dampers, etc. Among them, liquid dampers mainly use the viscous resistance generated by the fluid during flow to play a damping role.

[0003] Nowadays, many lids, such as washing machine lids, toilet lids, etc., are provided with liquid dampers. CN220955191U discloses a spiral hydraulic damper, which relies on the flow of damping fluid in the first cavity and the second cavity to play a damping role. However, for the above spiral hydraulic damper, structures such as spiral sliders and check valves need to be provided inside, which has many components, high costs, and is prone to misassembly. In severe cases, it may even get stuck. In addition, there is a large damping force in both rotational directions of this damper, which is not conducive to the opening of the lid. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a liquid damper that can solve one or more of the above problems.

[0005] According to one aspect of the utility model, a liquid damper is provided, which includes a housing, a shaft, and a leaf spring.

[0006] The housing is provided with a receiving cavity, the receiving cavity can be filled with liquid, the shaft is arranged on the receiving cavity, the shaft and the housing can rotate relative to each other, one end of the shaft is provided with a shaft head, and the shaft head protrudes from the housing.

[0007] Inner ribs are provided on the inner wall of the receiving cavity, and the inner ribs can abut against the side of the shaft.

[0008] The shaft is provided with outer ribs, and the receiving cavity is provided with a first cavity and a second cavity on both sides of the outer ribs respectively.

[0009] The outer ribs are provided with a plurality of through holes, the first cavity and the second cavity can be connected through the through holes, the through holes are divided into always-open through holes and always-closed through holes, and the leaf spring is connected to one side of the outer ribs and can cover one side of the always-closed through holes.

[0010] The beneficial effect of the utility model is that in the utility model, components such as check valves are not required, the number of components is small, the cost is low, and the assembly difficulty is low, the precision is high, and the working stability is good.

[0011] Moreover, during use, when the relative rotation direction of the housing and the shaft causes the liquid to flow from the side of the normally closed through-hole covered by the elastic piece towards the uncovered side, the elastic piece is pressed, and the normally closed through-hole cannot be opened. The liquid in the first chamber and the second chamber can only flow through the normally open through-hole. Since there is little flowable space, obvious damping can be generated, effectively suitable for use when structures such as the external lid are closed. When the relative rotation of the housing and the shaft causes the liquid to flow from the uncovered side of the normally closed through-hole towards the side covered by the elastic piece, the elastic piece can be pushed open by the impact of the liquid. Then, the liquid in the first chamber and the second chamber can flow through the normally open through-hole and the normally closed through-hole simultaneously. Since there is more flowable space, the damping generated is quite small, effectively suitable for use when structures such as the external lid are opened. Thus, the utility model can generate damping effects of different magnitudes with the relative rotation of the housing and the shaft in different directions to match different usage requirements. Additionally, by adjusting the number of the normally open through-hole and the normally closed through-hole, the damping magnitude generated by the utility model can be effectively changed to adapt to different damping magnitude requirements.

[0012] In some embodiments, a gap is provided between the outer rib and the inner wall of the accommodating cavity, and the first chamber and the second chamber can communicate with each other through the gap. The setting of the gap can facilitate changing the damping magnitude generated by the utility model by adjusting the size of the gap.

[0013] In some embodiments, the size of the gap can change with the change of the relative position of the shaft and the housing. By controlling the size and change of the gap, the utility model can achieve any change in the damping magnitude, such as gradually decreasing, gradually increasing, first decreasing and then increasing, first increasing and then decreasing, etc., further improving the applicable scenarios of the utility model.

[0014] In some embodiments, both the outer ribs and the inner ribs are multiple. An outer rib is provided between adjacent inner ribs. The first chamber and the second chamber are respectively provided on both sides of each outer rib in the accommodating cavity. An elastic piece is connected to one side of each outer rib, and multiple elastic pieces are rotationally symmetrically arranged.

[0015] In some embodiments, the housing includes a housing main body and a cover block. The accommodating cavity is arranged in the housing main body. A shaft seat is provided at one end of the housing main body. One end of the shaft is rotatably arranged on the shaft seat. The cover block is installed at the other end of the housing main body, and the other end of the shaft passes through the cover block.

[0016] In some embodiments, the housing includes a sealing ring, the shaft is provided with a ring block connected to the outer rib, the ring block can abut against the inner wall of the accommodating cavity, the cover block is attached to the ring block, and the sealing ring is embedded between the cover block and the ring block. The ring block can seal the accommodating cavity, and setting the sealing ring between the ring block and the cover block can effectively improve the connection sealing performance between the ring block and the cover block, and reduce the probability of liquid leakage from the accommodating cavity.

[0017] In some embodiments, the housing body is provided with a plurality of first protrusions, the cover block is provided with a plurality of second protrusions, and the plurality of first protrusions and the plurality of second protrusions are connected in one-to-one correspondence. The arrangement of the first protrusions and the second protrusions can increase the connection contact area between the housing body and the cover block and improve the connection reliability therebetween.

[0018] In some embodiments, the elastic piece is provided with a hole, and the hole communicates with the normally open through hole. Thus, a hole can be directly provided on the elastic piece when needed, so that the normally closed through hole directly becomes a normally open through hole to adjust the damping magnitude during the use of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a liquid damper according to an embodiment of the present invention.

[0020] Figure 2 is an exploded view of the schematic structural diagram of a liquid damper according to an embodiment of the present invention.

[0021] Figure 3 is a cross-sectional view of the schematic structural diagram of a liquid damper according to an embodiment of the present invention.

[0022] Figure 4 is a cross-sectional view of the schematic structural diagram of a liquid damper according to an embodiment of the present invention.

[0023] Figure 5 is a cross-sectional view of the schematic structural diagram of a liquid damper according to an embodiment of the present invention.

[0024] Figure 6 is a cross-sectional view of the schematic structural diagram of a liquid damper according to an embodiment of the present invention.

[0025] Figure 7 is a cross-sectional view of the schematic structural diagram of a liquid damper according to an embodiment of the present invention.

[0026] In the figure: 1. housing, 2. shaft, 3. elastic piece, 11. housing main body, 12. cover block, 13. sealing ring, 14. inner rib, 111. shaft seat, 112. first protrusion, 121. second protrusion, 21. ring block, 22. shaft head, 23. outer rib, 231. through hole, 2311. normally open through hole, 2312. normally closed through hole, 101. first chamber, 102. second chamber, 31. hole, 103. gap. Detailed implementation mode

[0027] The structural principle and working principle of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

[0028] Embodiment 1

[0029] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A liquid damper according to this embodiment includes a housing 1, a shaft 2 and an elastic piece 3.

[0030] The housing 1 includes a housing main body 11 and a cover block 12. A receiving cavity is provided inside the housing main body 11. A shaft seat 111 is provided at one end of the housing main body 11. One end of the shaft 2 is embedded in the shaft seat, and the shaft 2 and the housing main body 11 can rotate relative to each other after being arranged.

[0031] A ring block 21 is provided on the side of the shaft 2, and the ring block 21 abuts against the inner wall of the receiving cavity, so that the ring block 21 can close the receiving cavity.

[0032] A plurality of first protrusions 112 are provided on the side of the housing main body 11, and a plurality of second protrusions 121 are provided on the cover block 12. In this embodiment, both the first protrusions 112 and the second protrusions 121 are preferably four. The four first protrusions 112 and the four second protrusions 121 are connected in one-to-one correspondence by screws, so that the cover block 12 is fixedly connected to the other end of the housing main body 11.

[0033] After being arranged, the cover block 12 is attached to the ring block 21 of the shaft 2. The housing 1 includes a sealing ring 13, and the sealing ring 13 is embedded between the cover block 12 and the ring block 21.

[0034] A shaft head 22 is provided at the other end of the shaft 2, and the shaft head 22 passes through the cover block 12, that is, the shaft head 22 exposes from the housing 1.

[0035] Inner ribs 14 are also provided on the inner wall of the receiving cavity of the housing 1. The inner ribs 14 can be multiple. In this embodiment, the inner ribs 14 are preferably two, and both of the two inner ribs 14 can abut against the side of the shaft 2.

[0036] On the side of the shaft 2, there are external rib ribs 23. There can be multiple external rib ribs 23. In this embodiment, the external rib ribs 23 are preferably two. One end of each of the two external rib ribs 23 is integrally formed and connected to the ring block 21. After being arranged, the external rib ribs 23 are all located in the accommodating cavity, and the external rib ribs 23 can abut against the inner wall of the accommodating cavity.

[0037] And external rib ribs 23 can be provided between adjacent internal rib ribs 14. In this embodiment, preferably, the internal rib ribs 14 and the external rib ribs 23 are arranged alternately in sequence, that is, one external rib rib 23 is provided between the opposite sides of two adjacent internal rib ribs 14, and one external rib rib 23 is also provided between the opposite sides of the other side.

[0038] On both sides of each external rib rib 23 in the accommodating cavity, there are respectively a first cavity 101 and a second cavity 102. The accommodating cavity can be filled with liquids such as oil. That is, each first cavity 101 and second cavity 102 is filled with liquid.

[0039] There are through holes 231 on the external rib rib 23. There can be multiple through holes 231. The first cavity 101 and the second cavity 102 near both sides of one external rib rib 23 can be connected through the through holes 231 on this external rib rib 23.

[0040] And the through holes 231 can be divided into normally open through holes 2311 and normally closed through holes 2312. In this embodiment, there is one normally open through hole 2311 for each external rib rib 23, and the remaining through holes 231 are all normally closed through holes 2312.

[0041] On one side of each external rib rib 23, there is a spring piece 3 fixedly connected by bolts respectively. The installation positions of the spring pieces 3 on each external rib rib 23 are matched, so that each spring piece 3 can be rotationally symmetrically arranged around the center of the shaft 2.

[0042] And the spring piece 3 on each external rib rib 23 can cover one side of the normally closed through hole 3 of this external rib rib 23, so that this side of the normally closed through hole 3 is closed. At the same time, there are holes 31 on the spring piece 3. The number of holes 31 can be matched with the number of external rib ribs 23 connected to the spring piece 3. The holes 31 on the spring piece 3 will be in one-to-one correspondence and connected to the normally open through holes 3 of the external rib ribs 23 connected to it.

[0043] When the liquid damper of this embodiment is in use, when the relative rotation of the shell 1 and the shaft 2 causes the liquid to flow from the side of the normally sealed through hole 2312 covered by the spring 3 to the uncovered side, that is, in this embodiment, it is preferred that the shell 1 rotates counterclockwise relative to the shaft 2. At this time, the volume of the second chamber 102 decreases and the pressure increases, while the volume of the first chamber 101 increases and the pressure decreases. The liquid in the second chamber 102 will need to flow to the first chamber 101. At this time, the liquid will press the spring 3 against the outer rib 23, and the spring 3 effectively closes the normally sealed through hole 2312. The liquid in the second chamber 102 can only flow into the first chamber 101 from the normally open through hole 2311. Due to the small flow space, the liquid damper can generate obvious damping force on the rotation of the shell 1.

[0044] When the shell 1 and the shaft 2 rotate relative to each other, the liquid needs to flow from the side of the normally sealed through hole 2312 that is not covered by the spring piece 3 to the covered side, that is, in this embodiment, the shell 1 preferably rotates clockwise relative to the shaft 2. At this time, the volume of the first chamber 101 decreases and the pressure increases, while the volume of the second chamber 102 increases and the pressure decreases. The liquid in the first chamber 101 needs to flow to the second chamber 102. At this time, the liquid can impact the spring piece 3 to make the spring piece 3 break away from the normally sealed through hole 2312. Then, the liquid in the first chamber 101 can flow from the normally open through hole 2311 and the normally sealed through hole 2312 into the second chamber 102. Since there is more space for flow, the liquid damper can produce very little or no damping force on the rotation of the shell 1 without affecting the rotation of the shell 1.

[0045] The liquid damper of this embodiment can generate damping forces of different magnitudes when the shell 1 rotates in different directions, and can be effectively used on the covers of equipment such as refrigerators and washing machines, so that the cover can be damped when falling and will not fall quickly to avoid accidents. At the same time, the cover will basically not be damped when opening to affect its opening.

[0046] Example 2

[0047] refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 A liquid damper of this embodiment includes a shell 1, a shaft 2 and a spring 3.

[0048] The housing 1 comprises a housing body 11 and a cover block 12. The housing body 11 has a receiving cavity, one end of the housing body 11 is provided with a shaft seat 111, one end of the shaft 2 is embedded in the shaft seat, and the shaft 2 and the housing body 11 rotate relative to each other after being arranged.

[0049] A ring block 21 is provided on the side of the shaft 2 , and the ring block 21 abuts against the inner wall of the accommodating cavity, so that the ring block 21 can seal the accommodating cavity.

[0050] A plurality of first protrusions 112 are provided on the side of the housing main body 11, and a plurality of second protrusions 121 are provided on the cover block 12. In this embodiment, both the first protrusions 112 and the second protrusions 121 are preferably four. The four first protrusions 112 and the four second protrusions 121 are connected to each other one by one by screws, so that the cover block 12 is fixedly connected to the other end of the housing main body 11.

[0051] The arranged cover block 12 is attached to the ring block 21 of the shaft 2. The housing 1 includes a sealing ring 13, and the sealing ring 13 is embedded between the cover block 12 and the ring block 21.

[0052] A shaft head 22 is provided at the other end of the shaft 2, and the shaft head 22 passes through the cover block 12.

[0053] Inner ribs 14 are further provided on the inner wall of the accommodating cavity of the housing 1. There can be a plurality of inner ribs 14. In this embodiment, the inner ribs 14 are preferably two, and both of the two inner ribs 14 can abut against the side of the shaft 2.

[0054] Outer ribs 23 are provided on the side of the shaft 2. There can be a plurality of outer ribs 23. In this embodiment, the outer ribs 23 are also preferably two. One ends of the two outer ribs 23 are integrally formed and connected to the ring block 21. After being arranged, the outer ribs 23 are all located in the accommodating cavity, and there is a gap 103 between the outer ribs 23 and the inner wall of the accommodating cavity.

[0055] An outer rib 23 can be provided between adjacent inner ribs 14. In this embodiment, preferably, the inner ribs 14 and the outer ribs 23 are arranged alternately, that is, an outer rib 23 is provided between the opposite sides of two adjacent inner ribs 14, and an outer rib 23 is also provided between the opposite sides on the other side.

[0056] A first cavity 101 and a second cavity 102 are respectively provided on both sides of each outer rib 23 in the accommodating cavity. The accommodating cavity can be filled with a liquid such as oil, that is, each first cavity 101 and second cavity 102 is filled with a liquid.

[0057] Through holes 231 are provided on the outer ribs 23. There can be a plurality of through holes 231. The first cavity 101 and the second cavity 102 near both sides of an outer rib 23 can be communicated through the through holes 231 on the outer rib 23. At the same time, the first cavity 101 and the second cavity 102 can also be communicated through the gap 103.

[0058] The through holes 231 can be divided into normally open through holes 2311 and normally closed through holes 2312. In this embodiment, there is one normally open through hole 2311 for each outer rib 23, and the remaining through holes 231 are all normally closed through holes 2312.

[0059] On one side of each outer rib 23, elastic pieces 3 are respectively fixedly connected by bolts, and the elastic pieces 3 on each outer rib 23 are arranged at matching positions, so that the elastic pieces 3 can be rotationally symmetrically arranged around the center of the shaft 2.

[0060] The elastic piece 3 on each outer rib 23 can cover one side of the normally closed through hole 3 of the outer rib 23, so that this side of the normally closed through hole 3 is closed. At the same time, holes 31 are provided on the elastic piece 3, and the number of holes 31 can match the number of outer ribs 23 to which the elastic piece 3 is connected. The holes 31 on the elastic piece 3 will be in one-to-one correspondence and communication with the normally open through holes 3 of the outer ribs 23 to which it is connected.

[0061] When the liquid damper of this embodiment is in use, when the relative rotation of the housing 1 and the shaft 2 causes the liquid to flow from the side of the normally closed through hole 2312 covered by the elastic piece 3 towards the uncovered side, that is, when the housing 1 rotates counterclockwise relative to the shaft 2 as preferably in this embodiment, at this time, the volume of the second chamber 102 decreases and the pressure increases, while the volume of the first chamber 101 increases and the pressure decreases. The liquid in the second chamber 102 needs to flow towards the first chamber 101. At this time, the liquid will press the elastic piece 3 against the outer rib 23, and the elastic piece 3 effectively closes the normally closed through hole 2312. The liquid in the second chamber 102 can only flow into the first chamber 101 through the normally open through hole 2311 and the gap 103. Due to the small flowable space, this liquid damper can generate an obvious damping force on the rotation of the housing 1.

[0062] When the relative rotation of the housing 1 and the shaft 2 causes the liquid to flow from the side of the normally closed through hole 2312 not covered by the elastic piece 3 towards the covered side, that is, when the housing 1 rotates clockwise relative to the shaft 2 as preferably in this embodiment, at this time, the volume of the first chamber 101 decreases and the pressure increases, while the volume of the second chamber 102 increases and the pressure decreases. The liquid in the first chamber 101 needs to flow towards the second chamber 102. At this time, the liquid can impact the elastic piece 3 to make the elastic piece 3 disengage from the normally closed through hole 2312. Then, the liquid in the first chamber 101 can flow into the second chamber 102 through the normally open through hole 2311, the normally closed through hole 2312, and the gap 103. Since the flowable space is large, this liquid damper can generate a very small or even no damping force on the rotation of the housing 1, and will not affect the rotation of the housing 1.

[0063] In addition, by changing the thickness of different positions on the inner wall of the accommodating chamber, the size of the gap 103 can be changed accordingly, so that different damping forces can be generated correspondingly when the outer rib 23 is in different positions in the accommodating chamber, that is, the size of the gap 103 can change with the change of the relative position of the shaft 2 and the housing 1.

[0064] For example, in this embodiment Figure 5 、 Figure 6 and Figure 7At the position where the external rib 23 is located as shown, the gap 103 gradually increases. Thus, when the housing 1 rotates counterclockwise relative to the shaft 2, as the rotation position of the housing 1 changes, due to the gradual increase of the gap 103, the flowable space of the liquid becomes larger and larger, and the damping force will gradually decrease accordingly.

[0065] Therefore, by adjusting the gap 103, such as adjusting the thickness of the inner wall of the accommodating cavity, etc., any damping force change mode can be realized, such as gradually decreasing, gradually increasing, first decreasing and then increasing, first increasing and then decreasing, etc., so that the liquid damper can effectively meet different usage requirements.

[0066] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A liquid damper, characterized in that, It includes a housing, a shaft and an elastic sheet, The housing is provided with a receiving cavity, a liquid can be loaded in the receiving cavity, the shaft is arranged on the receiving cavity, the shaft and the housing can rotate relatively, one end of the shaft is provided with a shaft head, and the shaft head protrudes from the housing. Inner ribs are provided on the inner wall of the receiving cavity, and the inner ribs can abut against the side of the shaft. The shaft is provided with outer ribs, and a first cavity and a second cavity are respectively arranged on both sides of the outer ribs in the receiving cavity. The outer ribs are provided with a plurality of through holes, the first cavity and the second cavity can be connected through the through holes, the through holes are divided into normally open through holes and normally closed through holes, and the elastic sheet is connected to one side of the outer ribs and can cover one side of the normally closed through holes.

2. The liquid damper according to claim 1, wherein A gap is provided between the outer ribs and the inner wall of the receiving cavity, and the first cavity and the second cavity can be connected through the gap.

3. The liquid damper according to claim 2, wherein The size of the gap can change with the change of the relative position between the shaft and the housing.

4. The liquid damper according to claim 1, characterized in that, Both the outer ribs and the inner ribs are multiple, an outer rib is provided between adjacent inner ribs, a first cavity and a second cavity are respectively arranged on both sides of each outer rib in the receiving cavity, an elastic sheet is respectively connected to one side of each outer rib, and the multiple elastic sheets are rotationally symmetrically arranged.

5. The liquid damper according to claim 1, wherein, The housing includes a housing body and a cover block, the receiving cavity is arranged in the housing body, a shaft seat is provided at one end of the housing body, one end of the shaft is rotatably arranged on the shaft seat, the cover block is installed at the other end of the housing body, and the other end of the shaft passes through the cover block.

6. The liquid damper according to claim 5, wherein The housing includes a sealing ring, the shaft is provided with a ring block connected to the outer ribs, the ring block can abut against the inner wall of the receiving cavity, the cover block is attached to the ring block, and the sealing ring is embedded between the cover block and the ring block.

7. The liquid damper according to claim 5, characterized in that, The housing body is provided with a plurality of first protrusions, the cover block is provided with a plurality of second protrusions, and the plurality of first protrusions and the plurality of second protrusions are connected in one-to-one correspondence.

8. The liquid damper according to claim 1, characterized in that, The elastic sheet is provided with a hole, and the hole is connected to the normally open through hole.

Images