A leak-proof check valve, hydraulic cylinder, prosthesis, and robot

Abstract

This invention discloses a leak-proof one-way valve, a hydraulic cylinder, a prosthesis, and a robot. The leak-proof one-way valve includes: a valve core with an inner expansion groove, the central angle of the groove opening being less than 180°; a sealing element located within the inner expansion groove; and a valve body with a sealing surface formed at its inlet. The surface of the sealing element protrudes from the groove opening and contacts the sealing surface. A portion of the sealing element's surface protrudes from the groove opening and is tightly fitted to the sealing surface, achieving a seal. The inner expansion groove extends from the groove opening to both sides, making the sealing element less prone to detachment and improving the leak-proof effect of the leak-proof one-way valve.

Description

Technical Field

[0001] This invention relates to the field of one-way valve technology, and more particularly to a leak-proof one-way valve, a hydraulic cylinder, a prosthesis, and a robot. Background Technology

[0002] Fluid check valves are widely used in industrial applications, including automotive, home appliances, medical devices, and wearable devices. Especially in wearable devices and home appliances, such as prosthetics and robots, the reverse sealing capability of check valves is crucial; excessive reverse leakage can lead to reduced system efficiency and poor pressure maintenance. Currently, optimization of check valves in existing hydraulic systems focuses on opening pressure and pressure loss, but leakage remains a problem.

[0003] Therefore, existing technologies still need improvement and development. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a leak-proof check valve, hydraulic cylinder, prosthesis and robot in view of the above-mentioned defects of the prior art, so as to solve the problem of leakage in the check valve in the prior art.

[0005] The technical solution adopted by this invention to solve the technical problem is as follows: A leak-proof check valve, comprising: The valve core has an inner expansion groove, and the central angle corresponding to the opening of the inner expansion groove is less than 180°. The seal is located within the inner expansion groove; Valve body, wherein the inlet of the valve body has a sealing surface; The surface of the seal protrudes from the groove and contacts the sealing surface.

[0006] In the aforementioned leak-proof one-way valve, the central angle corresponding to the opening of the inner expansion groove is greater than 30°.

[0007] The aforementioned leak-proof check valve, wherein the valve core comprises: Valve head, facing the inlet; Valve sleeve, connected to the valve head; The valve sleeve has a protrusion that surrounds the valve head; A notch is formed on the valve head; The valve sleeve, the protrusion, and the notch form the inner expansion groove.

[0008] The leak-proof one-way valve, wherein the cross-section of the inner expansion groove is pentagonal.

[0009] The leak-proof check valve, wherein the valve head forms a spherical crown structure; The sealing surface extends to the corresponding position of the spherical crown structure and is configured to support the spherical crown structure.

[0010] The leak-proof one-way valve has a petal-shaped channel formed inside the valve body, and the valve core is located inside the petal-shaped channel. The petals of the petal-shaped channel are centrally symmetrically distributed.

[0011] The leak-proof check valve further includes: An elastic element provides the valve core with an elastic force to move toward the inlet; A support member is configured to support the elastic member.

[0012] A hydraulic cylinder, comprising: a leak-proof check valve as described in any of the above claims.

[0013] A prosthesis comprising: a leak-proof check valve as described in any of the preceding claims, or a hydraulic cylinder as described above.

[0014] A robot, wherein a leak-proof check valve as described in any of the above, or a hydraulic cylinder as described above, or a prosthesis as described above.

[0015] Beneficial effects: Part of the seal's surface protrudes from the groove and fits tightly against the sealing surface, achieving a seal. The inner expansion groove extends to both sides from the groove opening to the bottom, making the seal less prone to detachment and improving the leak-proof effect of the leak-proof check valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first structure of the anti-leakage check valve in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the second structure of the leak-proof check valve in an embodiment of the present invention.

[0018] Figure 3 This is the first exploded view of the leak-proof check valve in an embodiment of the present invention.

[0019] Figure 4 This is a second exploded view of the leak-proof check valve in an embodiment of the present invention.

[0020] Figure 5 This is an exploded cross-sectional view of the anti-leakage check valve in an embodiment of the present invention.

[0021] Figure 6 This is a side view of the leak-proof check valve in an embodiment of the present invention.

[0022] Figure 7 yes Figure 6 Cross-sectional view along direction A.

[0023] Figure 8 This is a schematic diagram of the valve core and seal in an embodiment of the present invention.

[0024] Figure 9 This is an exploded view of the valve core and seal in an embodiment of the present invention.

[0025] Figure 10 This is a cross-sectional view of the valve core and the seal in an embodiment of the present invention.

[0026] Figure 11 This is a cross-sectional view of the valve core in an embodiment of the present invention.

[0027] Figure 12 This is a first cross-sectional view of the leak-proof check valve in an embodiment of the present invention.

[0028] Figure 13 This is a second cross-sectional view of the leak-proof check valve in an embodiment of the present invention.

[0029] Figure 14 This is a third cross-sectional view of the leak-proof check valve in an embodiment of the present invention.

[0030] Figure 15 yes Figure 6 Cross-sectional view along the B direction.

[0031] Figure 16 This is a top view of the valve body in an embodiment of the present invention.

[0032] Figure 17 This is a cross-sectional view of the valve body in an embodiment of the present invention.

[0033] Figure 18 This is a cross-sectional view of the hydraulic cylinder in an embodiment of the present invention.

[0034] Figure 19 This is a schematic diagram of the structure of the prosthesis in an embodiment of the present invention.

[0035] Figure 20 This is a schematic diagram of the robot in an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures: 10. Valve core; 101. Inner groove; 11. Valve head; 111. Notch; 112. Spherical crown structure; 113. Head; 114. Connecting part; 12. Valve sleeve; 121. Protrusion; 122. First chamfer; 123. Second chamfer; 124. Countersunk hole; 20. Sealing components; 30. Valve body; 31. Inlet; 32. Sealing surface; 33. Petal-shaped channel; 331. Center; 332. Petal; 34. Mounting groove; 35. Flange; 36. Separating ridge; 40. Elastic components; 50. Support component; 51. Base; 511. Through hole; 52. Column. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0038] Please also refer to Figures 1-17 This invention provides some embodiments of a leak-proof one-way valve. Hollow arrows indicate the direction of fluid flow.

[0039] like Figure 1 , Figure 2 , Figure 5 and Figure 11 As shown, the leak-proof check valve of the present invention includes: The valve core 10 has an inner expansion groove 101, and the central angle corresponding to the groove opening of the inner expansion groove 101 is less than 180°. The sealing element 20 is located within the inner expansion groove 101; Valve body 30, wherein the inlet 31 of the valve body 30 has a sealing surface 32; The surface of the seal 20 protrudes from the groove and contacts the sealing surface 32.

[0040] Specifically, existing check valves typically achieve sealing through a seal 20. During long-term use, the seal 20 can be compressed and deformed, and may even be squeezed out, potentially posing a leakage risk. The leak-proof check valve of this application provides both unidirectional flow and leak-proof performance. An inner expansion groove 101 is formed on the valve core 10, and the seal 20 is placed within the inner expansion groove 101. This prevents the seal 20 from being excessively compressed and from being easily squeezed out of the inner expansion groove 101. The inner expansion groove 101 refers to a groove structure where the width of the opening is smaller than the maximum width of the inner wall. The inner expansion groove 101 expands to both sides from the opening to the bottom, making it difficult for the seal 20 to fall off, thus improving the leak-proof effect of the leak-proof check valve. Figure 10 , Figure 11 , Figure 13 and Figure 14 As shown, a portion of the surface of the seal 20 protrudes from the groove and comes into close contact with the sealing surface 32 to achieve a seal. When the seal 20 is further compressed, the valve core 10 comes into contact with the sealing surface 32, preventing the seal 20 from deforming excessively and improving the long-term leak-proof effect of the leak-proof check valve.

[0041] The opening of the inner expansion groove 101 is relatively small. In terms of cross-section, the central angle corresponding to the opening is less than 180°. Most of the seal 20 is inside the inner expansion groove 101, and a small part of the seal 20 is exposed outside the opening. The seal 20 is partially enclosed in the inner expansion groove 101. When the seal 20 is squeezed, it cannot be removed from the opening of the inner expansion groove 101.

[0042] A mounting groove 34 is formed on the outer side of the valve body 30. The mounting groove 34 is configured to install a sealing ring to achieve a seal between the valve body 30 and other structures. A flange 35 is formed at the edge of the mounting groove 34. The flange 35 limits the sealing ring and helps to prevent the sealing ring from falling out of the mounting groove 34.

[0043] In a preferred implementation of this invention, such as Figures 10-12 As shown, the central angle corresponding to the opening of the inner expansion groove 101 is greater than 30°.

[0044] Specifically, from a cross-sectional perspective, the central angle corresponding to the opening of the inner expansion groove 101 is greater than 30°, and a certain area of ​​the seal 20 is exposed in the groove opening. The exposed part of the seal 20 has a large deformation space to ensure sealing performance. The central angle corresponding to the opening of the inner expansion groove 101 is 40°~120°.

[0045] In a preferred implementation of this invention, such as Figures 3-9 As shown, the valve core 10 includes: Valve head 11, facing the inlet 31; Valve sleeve 12 is connected to the valve head 11; The valve sleeve 12 has a protrusion 121 forming around the valve head 11; the valve head 11 has a notch 111 forming; the valve sleeve 12, the protrusion 121 and the notch 111 form the inner expansion groove 101.

[0046] Specifically, the valve sleeve 12 is fitted over the valve head 11, and the valve sleeve 12 is connected to the valve head 11, which can be achieved through an interference fit or a threaded fit. The valve head 11 has high strength to resist the pressure of the fluid at the inlet 31. The valve head 11 can be made of a hard material, such as a metal. The valve head 11 includes a head 113 and a connecting portion 114. The valve sleeve 12 is fitted over the connecting portion 114, and the connecting portion 114 connects the head 113 and the valve sleeve 12, so that the head 113 and the valve sleeve 12 clamp the sealing element 20.

[0047] A protrusion 121 is formed on the side of the valve sleeve 12 facing the inlet 31, and a notch 111 is formed on the side of the valve head 11 away from the inlet 31. The protrusion 121, the notch 111, and the side of the valve sleeve 12 facing the inlet 31 form an inner groove 101. The seal 20 can be installed or removed by disassembling the valve sleeve 12 and the valve head 11.

[0048] In a preferred implementation of this invention, such as Figures 10-11 As shown, the cross-section of the inner expansion groove 101 is pentagonal.

[0049] Specifically, the seal 20 is a sealing ring. The cross-section of the seal 20 is a circle, and the cross-section of the inner groove 101 is a polygon with 4 to 12 sides. For example, the polygon is a pentagon, with the protrusion 121 as one side, the notch 111 as two sides, the side of the valve sleeve 12 as one side, and the groove as one side. The protrusion 121, the notch 111, and the four sides of the valve sleeve 12 provide good support for the seal 20, which helps maintain the circular shape of the seal 20 and limits its movement. The central angle corresponding to the groove is approximately 50° to 80°.

[0050] In a preferred implementation of this invention, such as Figures 15-17 As shown, a petal-shaped channel 33 is formed inside the valve body 30, and the valve core 10 is located inside the petal-shaped channel 33. The petals 332 of the petal-shaped channel 33 are centrally symmetrically distributed.

[0051] Specifically, the petal-shaped channel 33 includes a central portion 331 and multiple petals 332, with the petals 332 arranged around the central portion 331. The valve core 10 is specifically located in the central portion 331, and the petals 332 are arranged around the valve core 10. The petal-shaped channel 33 communicates with the inlet 31. Fluid enters from the inlet 31 and pushes the valve core 10 to move, allowing the fluid to enter the petals 332 and flow out. When fluid flows from the petals 332 towards the inlet 31, it cannot push the valve core 10 to move, and therefore cannot flow out from the inlet 31, thus achieving unidirectional flow of the leak-proof check valve. The diameter of the central portion 331 is larger than the diameter of the inlet 31, and the sealing surface 32 is frustoconical, connecting the central portion 331 and the inlet 31 respectively.

[0052] Multiple valve segments 332 are centrally symmetrically distributed. The fluid at the inlet 31 is divided into multiple parts and flows to the corresponding valve segments 332. This helps to cancel out the thrust of the valve core 10 by different valve segments 332, and avoids the valve core 10 being affected by fluid vortex in the valve body 30, which would cause rolling, hitting the wall and vibration, thus reducing noise. Therefore, the silent anti-leakage check valve can be achieved.

[0053] The valve portion 332 and the center portion 331 are connected, and the valve core 10 is exposed within the valve portion 332. A separating ridge 36 is formed between two adjacent valve portions 332, which guides the movement of the valve core 10. The surface of the separating ridge 36 facing the valve core 10 is arc-shaped to fit the side of the valve core 10, and there is a smooth transition between the separating ridge 36 and the sealing surface 32. The fluid in two adjacent valve portions 332 is restricted by the separating ridge 36 and the valve core 10, and cannot flow between them. The length of the center portion 331 is greater than the length of the valve core 10, so the fluid in the valve portion 332 can converge after passing through the valve core 10. A first chamfer 122 is formed at the end of the valve sleeve 12 facing the inlet 31, and the first chamfer 122 is specifically located outside the protrusion 121. Due to the presence of the first chamfer 122, a large gap is formed between the separating ridge 36 and the valve sleeve 12, which is beneficial for the fluid to flow into each valve portion 332. The valve sleeve 12 forms a second chamfer 123 at the end opposite to the inlet 31 to guide the fluid and reduce the resistance when the fluid converges.

[0054] In a preferred implementation of this invention, such as Figures 10-14 As shown, the valve head 11 forms a spherical crown structure 112; the sealing surface 32 extends to the corresponding position of the spherical crown structure 112 and is configured to support the spherical crown structure 112.

[0055] Specifically, the spherical crown structure 112 protrudes towards the inlet 31, which helps the valve head 11 resist the pressure of the fluid at the inlet 31 and reduces the squeezing force of the fluid on the valve head 11. The spherical crown structure 112 is specifically located at the head 113. The spherical crown structure 112 can also guide the fluid at the inlet 31 to its periphery so that the fluid enters the corresponding petal 332, reducing the generation of fluid eddies and lowering noise and flow resistance. The sealing surface 32 is not only located at the corresponding position of the seal 20, forming a sealing contact with the seal 20, but also extends towards the inlet 31 to the corresponding position of the spherical crown structure 112. If the fluid pressure in the petal-shaped channel 33 is high, it squeezes the valve core 10 towards the inlet 31, causing the seal 20 to deform further until the spherical crown structure 112 contacts the sealing surface 32. The sealing surface 32 supports the spherical crown structure 112, preventing the seal 20 from deforming excessively and preventing the seal 20 from detaching from the inner expansion groove 101.

[0056] Several guide grooves are formed on the spherical crown structure 112. The number of guide grooves is the same as the number of petal sections 332, and the positions of the guide grooves correspond to the positions of the petal sections 332. The guide grooves guide the fluid to the corresponding discharge channel. The guide grooves are smoothly transitioned recesses distributed on the head 113, which helps to reduce fluid resistance. The connecting part 114 can be a hollow rod to reduce the weight of the valve head 11. The hollow rod is connected to the central part 331. The hollow rod can hold the fluid in the central part 331 and apply extrusion pressure from the center of the valve core 10. Therefore, when the valve head 11 compresses the conical wall, it will not leak due to uneven extrusion pressure causing the valve head 11 to tilt.

[0057] In a preferred implementation of this invention, such as Figures 2-5 As shown, the leak-proof check valve also includes: The elastic element 40 provides the valve core 10 with an elastic force to move toward the inlet 31; Support member 50 is configured to support the elastic member 40.

[0058] Specifically, the elastic element 40 presses the valve core 10 towards the inlet 31, thereby causing the sealing element 20 to adhere tightly to the sealing surface 32, achieving a seal. Fluid enters the valve body 30 from the inlet 31 and pushes the valve core 10 to move, causing the elastic element 40 to deform. The fluid enters the valve portion 332 and is discharged. The fluid in the valve portion 332 cannot push the valve core 10 to move, cannot cause the elastic element 40 to deform, and therefore cannot flow from the valve portion 332 to the inlet 31. The support seat supports the elastic element 40, so that the elastic element 40 is located between the support seat and the valve core 10. The support seat can be connected to the valve body 30, or it can be independent of the valve body 30. After installation, the support seat is limited or fixed by other structures. The support seat includes a seat body 51 and a column 52. The column 52 is located at the center of the seat body 51. Multiple through holes 511 are formed on the seat body 51, and the multiple through holes 511 are arranged around the column 52. The outer edge of the through hole 511 is close to the outer edge of the valve 332, making it easier for fluid in the valve 332 to drain out of the through hole 511 with less resistance. One end of the elastic member 40 is fitted over the column 52, and the other end is fitted over the connecting part 114.

[0059] A countersunk hole 124 is formed on the valve sleeve 12. The countersunk hole 124 includes a large hole and a small hole, which are interconnected. The connecting part 114 passes through the large hole and the small hole in sequence. There is a gap between the connecting part 114 and the wall of the large hole. The elastic element 40 is located in the large hole, which provides space for the deformation of the elastic element 40.

[0060] like Figure 18 As shown, based on the anti-leakage check valve described in any of the above embodiments, the present invention also provides an embodiment of a hydraulic cylinder.

[0061] The hydraulic cylinder of the present invention includes: a leak-proof check valve as described in any of the above embodiments.

[0062] Based on the leak-proof check valve or hydraulic cylinder described in any of the above embodiments, the present invention also provides an embodiment of a prosthesis.

[0063] The prosthesis of the present invention includes: a leak-proof check valve as described in any of the above embodiments, or a hydraulic cylinder as described in any of the above embodiments. Figure 19 For the ankle, a hydraulic cylinder as described in any of the above embodiments can be used. Similarly, a hydraulic cylinder as described in any of the above embodiments can also be used for the arm or leg.

[0064] Based on the leak-proof check valve, hydraulic cylinder, or prosthesis described in any of the above embodiments, the present invention also provides an embodiment of a robot.

[0065] The robot of the present invention includes: a leak-proof check valve as described in any of the above embodiments, or a hydraulic cylinder as described in any of the above embodiments, or a prosthesis as described in any of the above embodiments.

[0066] Robots can be special robots, wheeled robots, legged robots, crawler robots, squirming robots, flying robots, floating robots, diving robots, ground robots, underground robots, space robots, SCARA robots, parallel robots, master-slave robots, collaborative robots, etc. Robots can be single-armed or multi-armed. Figure 20 It is a wheeled robot with bionic arms, wherein either bionic arm can be a hydraulic cylinder or limb as described in any of the above embodiments.

[0067] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A leak-proof check valve characterized by, The valve core is formed with an inner expansion groove, an opening of the inner expansion groove corresponding to a central angle of less than 180°; The sealing element is located in the inner expansion groove; The valve body is formed with a sealing surface at an inlet thereof; The surface of the sealing element protrudes from the opening and is in contact with the sealing surface. The central angle corresponding to the opening of the inner expansion groove is greater than 30°.

2. The leak-proof check valve of claim 1, wherein, The valve core comprises:

3. The leak-proof check valve of claim 1, wherein, A valve head facing the inlet; A valve sleeve connected with the valve head; The valve sleeve is formed with a protrusion around the valve head; The valve head is formed with a notch; The valve sleeve, the protrusion and the notch form the inner expansion groove. The cross section of the inner expansion groove is pentagonal.

4. The leak-proof check valve of claim 3, wherein, The valve head is formed with a spherical cap structure; 5. The leak-proof check valve of claim 3, wherein, The sealing surface extends to a position corresponding to the spherical cap structure and is configured to support the spherical cap structure. The valve body is formed with a petal-shaped channel, the valve core is located in the petal-shaped channel, and each petal of the petal-shaped channel is centrally symmetrically distributed.

6. The leak-proof check valve of claim 5, wherein, The leak-proof one-way valve further comprises:

7. The leak-proof check valve of claim 3, wherein, An elastic element providing an elastic force for the valve core to move towards the inlet; A support element configured to support the elastic element. The leak-proof one-way valve comprises:

8. A hydraulic cylinder characterized by, The leak-proof one-way valve according to any one of claims 1-7. The leak-proof one-way valve comprises:

9. A prosthesis, characterized in that The leak-proof one-way valve according to any one of claims 1-7, or the hydraulic cylinder according to claim 8. The leak-proof one-way valve according to any one of claims 1-7, or the hydraulic cylinder according to claim 8, or the prosthesis according to claim 9.

10. A robot, characterized in that ​

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