Rotary pushing buffer

Abstract

The rotary pushing buffer comprises a shell and a rotating shaft, damping oil is filled in the shell, a sliding sleeve is arranged in the shell in a sliding mode, a first sealing ring is arranged on the surface of the sliding sleeve, the sealing ring is used for blocking a gap between the sliding sleeve and the inner wall of the shell, and the rotating shaft is rotationally connected with one side of the shell. One end of the rotating shaft extends into the sliding sleeve, one end of the rotating shaft is in threaded connection with one end of the sliding sleeve, a through hole is formed in the other end of the sliding sleeve, a one-way valve is arranged at the through hole in a sliding mode, a blocking piece is arranged on the side, close to the interior of the sliding sleeve, of the one-way valve, and the blocking piece can be used for blocking the through hole; one end of the adjusting rod is fixedly connected with the rotating shaft, the other end of the adjusting rod penetrates through the center of the blocking piece and the center of the one-way valve, and the adjusting rod is slidably connected with the one-way valve. The utility model provides a rotary pushing buffer which has larger torsion to convert hydraulic linear output into angle buffering force, so that the rotary pushing buffer has larger torsion.

Description

Technical Field

[0001] This utility model relates to the field of buffer technology, and in particular to a rotary push buffer. Background Technology

[0002] In the design of flip-top home appliances (such as toilets and washing machines), the self-closing deceleration and buffering performance of the lid directly affects the user experience and product reliability. With the increasing size and thinner design of lids, the torque generated by the lid's own weight during closure is significantly increased, requiring a buffer with greater damping force to achieve smooth and gentle closure.

[0003] In the existing technology, the buffer mainly adopts the structure of a spring, which uses the elastic force of the spring to play a buffering role. However, during use, the spring is prone to problems such as unstable closing speed, abnormal noise, or premature wear of components. Utility Model Content

[0004] The purpose of this utility model is to provide a rotary damper that has a large torque to convert the linear hydraulic output force into an angular buffering force, thus giving it a large torque.

[0005] The technical solution adopted by the rotary pusher buffer disclosed in this utility model is:

[0006] A rotary damper includes a housing and a rotating shaft. The housing is filled with damping oil, and a sliding sleeve is slidably disposed inside the housing. A first sealing ring is provided on the surface of the sliding sleeve to seal the gap between the sliding sleeve and the inner wall of the housing. The rotating shaft is rotatably connected to one side of the housing, and one end of the rotating shaft extends into the interior of the sliding sleeve. One end of the rotating shaft is threadedly connected to one end of the sliding sleeve. A through hole is provided at the other end of the sliding sleeve, and a one-way valve is slidably disposed at the through hole. A baffle is provided on the side of the one-way valve near the interior of the sliding sleeve, and the baffle can be used to seal the through hole. An adjusting rod is provided inside the housing. One end of the adjusting rod is fixedly connected to the rotating shaft, and the other end of the adjusting rod passes through the center of the baffle and the one-way valve. The adjusting rod is slidably connected to the one-way valve.

[0007] As a preferred embodiment, the middle part of the rotating shaft has a through structure, one end of the adjusting rod is threaded to the middle part of the rotating shaft, and the other end of the adjusting rod is provided with a tapered shaft, the diameter of which gradually increases towards the end of the adjusting rod closer to the rotating shaft.

[0008] As a preferred embodiment, a second sealing ring is provided between the adjusting rod and the rotating shaft.

[0009] As a preferred embodiment, the housing includes an outer shell and an end cap, which are detachably connected. The rotating shaft is rotatably connected to the end cap, and the rotating shaft is provided with a protruding ring near the inner side of the end cap. A gasket is provided between the protruding ring and the end cap.

[0010] As a preferred embodiment, a third sealing ring is provided between the rotating shaft and the end cover.

[0011] As a preferred embodiment, the inner wall of the housing is provided with a sliding groove, and the surface of the sliding sleeve is provided with a protrusion, the protrusion being slidably disposed in the sliding groove.

[0012] As a preferred embodiment, both the surface of the housing and the end of the rotating shaft extending out of the housing are provided with a flat structure.

[0013] As a preferred embodiment, the one-way valve is provided with an elastic buckle at the end away from the baffle, and the elastic buckle is engaged in the through hole of the sliding sleeve.

[0014] The beneficial effects of the rotary damper disclosed in this utility model are as follows: A sealing ring is installed on the sliding sleeve, ensuring that no oil can pass through the sealing ring area, thus dividing the interior of the housing into two cavities. When the outer cover plate closes, it drives the rotating shaft to rotate. The sliding sleeve is separately connected to the rotating shaft and slidably connected to the housing. Therefore, when the rotating shaft rotates, the sliding sleeve is restricted by the housing and simultaneously subjected to the action of the threaded rotation, causing the sliding sleeve to slide along the interior of the housing towards the rotating shaft. At this time, the internal volume of the housing on the side of the sliding sleeve closer to the rotating shaft decreases, and the damping oil is pressurized, pushing the one-way valve away from the rotating shaft. When the sliding movement occurs on one side, the one-way valve moves, and the baffle plate presses tightly against the end face of the inner wall of the sliding sleeve, blocking the oil passage gap in the through hole. This prevents the damping oil from passing through, causing the damping oil to pass only through the gap between the one-way valve and the adjusting rod. The gap between the one-way valve and the adjusting rod is small, thus generating a large pressure that prevents the sliding sleeve from moving further. This, in turn, affects the rotation of the shaft, generating resistance and preventing the cover plate from falling. When this resistance torque is calculated and is somewhat offset by the torque generated by the weight of the cover plate, a controllable falling speed can be obtained.

[0015] Similarly, when the shaft reverses, the sliding sleeve is pushed away from the shaft by the thread and slides. The hydraulic oil in the other cavity of the sliding sleeve is squeezed, which pushes the one-way valve towards the shaft. The end face of the baffle plate separates from the end face of the sliding sleeve, allowing the through hole to connect the two cavities. The damping oil can be connected through the through hole, and the resulting reverse damping force is very small, so the cover can be opened easily.

[0016] With the above structure, the rotating shaft and the sliding sleeve are connected by a thread, so that when the rotating shaft rotates forward or backward, it pushes the sliding sleeve to slide along the housing, thereby generating two working modes: high resistance and low resistance. The threaded connection can ensure a large torque for pushing, avoiding the problems of traditional springs. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a rotary pusher buffer according to this utility model.

[0018] Figure 2 This is an exploded view of a rotary pusher buffer according to this utility model.

[0019] Figure 3 This is a schematic diagram of the sliding sleeve and rotating shaft structure of a rotary pusher buffer according to this utility model.

[0020] Figure 4 This is a schematic diagram of a one-way valve structure for a rotary push buffer according to this utility model.

[0021] Figure 5 This is a schematic diagram of the one-way valve closed state structure of a rotary push buffer according to this utility model.

[0022] Figure 6 This is a schematic diagram of the one-way valve flow structure of a rotary push buffer according to this utility model.

[0023] Figure 7 This is an enlarged cross-sectional view of a one-way valve for a rotary pusher buffer according to this utility model. Detailed Implementation

[0024] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0025] Please refer to Figures 1 to 4 A rotary damper includes a housing 10 and a rotating shaft 20. The housing 10 is filled with damping oil. A sliding sleeve 30 is slidably disposed inside the housing 10. A first sealing ring 31 is provided on the surface of the sliding sleeve 30 to seal the gap between the sliding sleeve 30 and the inner wall of the housing 10. The rotating shaft 20 is rotatably connected to one side of the housing 10, and one end of the rotating shaft 20 extends into the sliding sleeve 30. One end of the rotating shaft 20 is threadedly connected to one end of the sliding sleeve 30. A through hole 301 is provided at the other end of the sliding sleeve 30. A one-way valve 32 is slidably disposed at the through hole 301. A baffle 321 is provided on the side of the one-way valve 32 near the inside of the sliding sleeve 30. The baffle 321 can be used to seal the through hole 301. An adjusting rod 40 is provided inside the housing 10. One end of the adjusting rod 40 is fixedly connected to the rotating shaft 20. The other end of the adjusting rod 40 passes through the center of the baffle 321 and the one-way valve 32. The adjusting rod 40 is slidably connected to the one-way valve 32.

[0026] Please refer to Figure 5The sliding sleeve 30 is equipped with a first sealing ring 31, which prevents oil from passing through. This divides the interior of the housing 10 into two cavities. When the outer cover closes, it drives the rotating shaft 20 to rotate. The sliding sleeve 30 is separately connected to the rotating shaft 20 and is slidably connected to the housing 10. Thus, when the rotating shaft 20 rotates, the sliding sleeve 30 is restricted by the housing 10 and subjected to the action of the threaded rotation, causing the sliding sleeve 30 to slide along the interior of the housing 10 towards the rotating shaft 20. At this time, the internal volume of the housing 10 on the side of the sliding sleeve 30 closer to the rotating shaft 20 decreases, and the damping oil is pressurized, pushing the one-way valve 32 away from the rotating shaft 20. When one side slides, after the one-way valve 32 moves, the baffle 321 is pressed against the end face of the inner wall of the sliding sleeve 30, which blocks the oil passage gap of the through hole 301, preventing the damping oil from passing through. As a result, the damping oil can only pass through the gap between the one-way valve 32 and the adjusting rod 40. The gap between the one-way valve 32 and the adjusting rod 40 is small, thus generating a large pressure, preventing the sliding sleeve 30 from continuing to move, which in turn affects the rotation of the rotating shaft 20, thereby generating resistance and preventing the cover plate from falling. When this resistance torque is calculated and it is mutually offset to a certain extent with the torque generated by the gravity of the cover plate, a controllable falling speed can be obtained.

[0027] Please refer to Figure 6 Similarly, when the rotating shaft 20 reverses, the sliding sleeve 30 is pushed away from the rotating shaft 20 by the thread and slides. The hydraulic oil in the other cavity of the sliding sleeve 30 is squeezed, thereby pushing the one-way valve 32 towards the rotating shaft 20. The end face of the baffle 321 is separated from the end face of the sliding sleeve 30, so that the through hole 301 connects the two cavities. The damping oil can be connected through the through hole 301, so the generated reverse damping force is very small, and the cover can be opened easily.

[0028] With the above structure, the rotating shaft 20 and the sliding sleeve 30 are connected by a thread, so that when the rotating shaft 20 rotates forward or backward, it pushes the sliding sleeve 30 to slide along the housing 10, thereby generating two working modes: large resistance and small resistance. The threaded connection can ensure that there is a large torque for pushing, avoiding the problems of traditional springs.

[0029] Please refer to Figure 7 In the above scheme, the middle part of the rotating shaft 20 is a through structure, one end of the adjusting rod 40 is threaded to the middle part of the rotating shaft 20, and the other end of the adjusting rod 40 is provided with a tapered shaft 41. The diameter of the tapered shaft 41 gradually increases towards the end of the adjusting rod 40 that is closer to the rotating shaft 20.

[0030] By engaging the tapered shaft 41 with the inner hole of the one-way valve 32, when the one-way valve 32 is in different positions of the tapered shaft 41, the current diameter of the tapered shaft 41 will be different, resulting in different gaps between the one-way valve 32 and the tapered shaft 41, different oil passage areas, different oil chamber pressures, and different transmitted torques. Therefore, by turning the adjusting rod 40 to adjust the position of the tapered shaft 41 extending into the one-way valve 32, the gap between the two can be adjusted. When adjusted to the appropriate position, the appropriate torque can be obtained.

[0031] A second sealing ring 42 is provided between the adjusting rod 40 and the rotating shaft 20 to prevent the damping oil inside the housing 10 from leaking from the connection between the adjusting rod 40 and the rotating shaft 20.

[0032] The housing 10 includes an outer shell 11 and an end cap 12, which are detachably connected. A rotating shaft 20 is rotatably connected to the end cap 12, and a protruding ring 21 is provided on the inner side of the rotating shaft 20 near the end cap 12. A gasket 22 is provided between the protruding ring 21 and the end cap 12. The gasket 22 reduces the friction between the rotating shaft 20 and the end cap 12. The housing 10 adopts a split structure for easy assembly and adjustment. A third sealing ring 23 is provided between the rotating shaft 20 and the end cap 12 to ensure a tight seal between them.

[0033] A groove is provided on the inner wall of the housing 10, and a protrusion 302 is provided on the surface of the sliding sleeve 30. The protrusion 302 is slidably disposed in the groove. The groove and the protrusion 302 can restrict the rotation of the sliding sleeve 30, preventing the sliding sleeve 30 from rotating with the rotating shaft 20 when the rotating shaft 20 rotates, and ensuring that the sliding sleeve 30 can slide along the inner wall of the housing 10.

[0034] The housing 10 surface and the shaft 20 extending out of the housing 10 are both provided with a flat structure. The flat structure can ensure that the housing 10 and the shaft 20 will not rotate with external components after they are installed and fixed.

[0035] The one-way valve 32 is provided with an elastic buckle 322 at the end away from the baffle 321. The elastic buckle 322 is locked in the through hole 301 of the sliding sleeve 30. The elastic buckle 322 and the baffle 321 cooperate to make a specific gap between the one-way valve 32 and the sliding sleeve 30. The one-way valve 32 can move back and forth, thereby switching the baffle 321 between the state of blocking the through hole 301 or the state of being away from the through hole 301.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A rotary push buffer, characterized in that, The device includes a housing and a rotating shaft. The housing is filled with damping oil, and a sliding sleeve is slidably disposed inside the housing. A first sealing ring is provided on the surface of the sliding sleeve to seal the gap between the sliding sleeve and the inner wall of the housing. The rotating shaft is rotatably connected to one side of the housing, and one end of the rotating shaft extends into the interior of the sliding sleeve. One end of the rotating shaft is threadedly connected to one end of the sliding sleeve. A through hole is provided at the other end of the sliding sleeve, and a one-way valve is slidably disposed at the through hole. A baffle is provided on the side of the one-way valve near the interior of the sliding sleeve, and the baffle can be used to seal the through hole. An adjusting rod is provided inside the housing. One end of the adjusting rod is fixedly connected to the rotating shaft, and the other end of the adjusting rod passes through the center of the baffle and the one-way valve. The adjusting rod is slidably connected to the one-way valve.

2. A rotary push buffer as described in claim 1, characterized in that, The rotating shaft has a through structure in the middle. One end of the adjusting rod is threaded to the middle of the rotating shaft. The other end of the adjusting rod is provided with a tapered shaft. The diameter of the tapered shaft gradually increases towards the end of the adjusting rod closer to the rotating shaft.

3. A rotary push buffer as described in claim 2, characterized in that, A second sealing ring is provided between the adjusting rod and the rotating shaft.

4. A rotary push buffer as described in claim 1, characterized in that, The housing includes an outer shell and an end cap, which are detachably connected. The rotating shaft is rotatably connected to the end cap, and a protruding ring is provided on the inner side of the rotating shaft near the end cap. A gasket is provided between the protruding ring and the end cap.

5. A rotary push buffer as described in claim 4, characterized in that, A third sealing ring is provided between the rotating shaft and the end cover.

6. A rotary push buffer as described in claim 4, characterized in that, The inner wall of the housing is provided with a sliding groove, and the surface of the sliding sleeve is provided with a protrusion, which is slidably disposed in the sliding groove.

7. A rotary push buffer as described in claim 1, characterized in that, The shell surface and the end of the rotating shaft extending out of the shell are both provided with a flat structure.

8. A rotary push buffer as described in claim 1, characterized in that, The one-way valve has an elastic buckle at the end away from the baffle, and the elastic buckle is engaged in the through hole of the sliding sleeve.

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