Damper with hollow rotating shaft

Abstract

The damper comprises a shell, an end cover and the rotating shaft, the end cover is connected with one side of the shell in a sealed mode, damping oil is filled in the shell, the rotating shaft is arranged in the shell, a through hole is formed in the middle of the rotating shaft in a penetrating mode, the two ends of the rotating shaft extend out of the shell and the end cover respectively, and the two ends of the rotating shaft are connected with the end cover and the shell in a rotating and sealing mode respectively. Two limiting bosses are oppositely arranged on the inner wall of the shell and make sliding contact with the surface of the rotating shaft, the limiting bosses are matched with the rotating shaft to divide the interior of the shell into two cavities, an edge is arranged on the surface of the rotating shaft in the axis direction, a valve block is correspondingly arranged on the edge, a U-shaped groove is formed in the position, corresponding to the edge, of the valve block, and a notch is formed in one side of the U-shaped groove. A gap exists between the edge and the inner wall of the U-shaped groove, and the inner wall of the shell is arranged on the side, away from the edge, of the valve block in a sliding fit mode. According to the damper with the hollow rotating shaft, the rotating shaft of the damper is of a hollow structure, corresponding connecting shafts can be conveniently and additionally installed according to different use scenes, and the damping function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of damper technology, and in particular to a damper with a hollow rotating shaft. Background Technology

[0002] Currently, most damping hinges used in flip covers on the market have a damper structure: a slender housing with a solid damping shaft for rotational connection, which connects to an external mounting shaft or hinge with holes. However, for some special flip structures, the existing damping shaft structure cannot be adapted, such as for larger covers or flip seats. In these cases, a higher-strength damping shaft is needed to directly connect to the base for positioning and support, thus preventing the damping shaft from breaking during use. Utility Model Content

[0003] The purpose of this utility model is to provide a damper with a hollow shaft. The hollow shaft facilitates the addition of corresponding connecting shafts for different usage scenarios to complete the damping function.

[0004] The technical solution adopted by the hollow shaft damper disclosed in this utility model is as follows:

[0005] A hollow damper includes a housing, an end cap, and a shaft. The end cap is sealed to one side of the housing. The housing is filled with damping oil. The shaft is disposed inside the housing. A through hole for mounting an external connecting shaft is provided through the middle of the shaft. Both ends of the shaft extend out of the housing and the end cap, respectively. The two ends of the shaft are rotatably sealed to the end cap and the housing. Two limiting bosses are provided opposite to each other on the inner wall of the housing. The limiting bosses slide in contact with the surface of the shaft. The limiting bosses cooperate with the shaft to divide the interior of the housing into two cavities to restrict the flow of the damping oil. The surface of the shaft has an edge along the axial direction. A valve plate is provided corresponding to the edge. A U-shaped groove is opened on the valve plate corresponding to the edge. The edge is disposed in the U-shaped groove. A notch is provided on one side of the U-shaped groove. There is a gap between the edge and the inner wall of the U-shaped groove. The side of the valve plate away from the edge is slidably fitted to the inner wall of the housing.

[0006] As a preferred embodiment, there are two edges, which are disposed opposite each other in the housing on both sides of the limiting boss, and the number of valve plates corresponds to the number of edges.

[0007] As a preferred embodiment, the surface of the rotating shaft is provided with an overflow groove on one side of the notch along the edge, and the overflow groove gradually becomes shallower along the edge toward the other side of the rotating shaft.

[0008] As a preferred embodiment, the two ends of the rotating shaft are respectively provided with sealing rings for the housing and the end cover, and a sealing ring is provided between the end cover and the housing.

[0009] As a preferred embodiment, the through hole has a rectangular cross-sectional shape, and the inner wall of the through hole is provided with a raised strip.

[0010] As a preferred embodiment, the surface of the housing is provided with mounting bosses.

[0011] The beneficial effects of the hollow shaft damper disclosed in this utility model are: the housing is fixed to the fixed component, and the shaft and the connecting shaft can be fixedly connected by selecting a suitable connecting shaft to pass through the shaft.

[0012] When an external load forces the shaft to rotate, the shaft drives the edge to rotate towards the side of the valve plate without a notch. This forces the internal volume of the valve plate's housing to decrease, increasing the pressure of the damping oil. This pushes the valve plate in the opposite direction of the shaft until the inner wall of the U-shaped groove fits against the side of the edge. This eliminates the end face gap between the U-shaped groove and the edge, preventing the damping oil from passing through the end face. At this point, the oil can only be squeezed through the gap between the housing, shaft, and valve plate to the other side of the valve plate. This results in very low efficiency for the damping oil to pass through, generating a large reaction force that prevents the shaft from rotating. Ultimately, this forces the movement of the external load to be obstructed, slowing down its speed, thus producing a damping effect.

[0013] When the external load reverses, it forces the shaft to reverse as well. The shaft, with its edge, rotates towards the side of the valve plate with the notch, causing the internal volume of the housing on the other side of the edge to decrease. The damping grease is compressed and generates a counterforce, forcing the other side of the valve plate's U-shaped groove to fit against the end face of the other side of the edge. The other side of the U-shaped groove has a notch, and during the rotation of the shaft, the end face that was originally fitted with the U-shaped groove on one side of the edge separates, thus creating a channel between the edge and the U-shaped groove, connecting the internal contents of the housings on both sides of the valve plate. Under pressure, the damping grease flows from the housing on the side of the valve plate that was originally compressed to the other side along the channel. Because the oil passage area of ​​the channel is much larger than that in the sealed state, the damping grease can flow quickly through the channel, generating very little reaction force. Externally, this means that it can be quickly restored with very little force.

[0014] The above structure allows for the connection of the required connecting shaft to the damper in different usage scenarios, while the damper also provides good damping performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a hollow damper with a rotating shaft according to the present invention.

[0016] Figure 2 This is a cross-sectional view of a hollow damper with a rotating shaft according to this utility model.

[0017] Figure 3 This is an exploded view of a hollow damper with a rotating shaft according to this utility model.

[0018] Figure 4 This is a schematic diagram of the shaft structure of a hollow damper according to the present invention.

[0019] Figure 5 This is a schematic diagram of the damping state structure of a hollow shaft damper according to the present invention.

[0020] Figure 6 This is a schematic diagram of the flow state structure of a hollow damper with a rotating shaft according to this utility model. Detailed Implementation

[0021] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0022] Please refer to Figures 1 to 4 A damper with a hollow rotating shaft 30 includes a housing 10, an end cap 20, and a rotating shaft 30. The end cap 20 is sealed to one side of the housing 10. The housing 10 is filled with damping oil. The rotating shaft 30 is disposed inside the housing 10. A through hole 31 for installing an external connecting shaft is provided through the middle of the rotating shaft 30. Both ends of the rotating shaft 30 extend out of the housing 10 and the end cap 20, respectively. Both ends of the rotating shaft 30 are rotatably sealed to the end cap 20 and the housing 10, respectively. This allows the rotating shaft 30 to be disposed through the housing 10, making the overall shape flat and reducing the installation space.

[0023] Two limiting protrusions 11 are provided on the inner wall of the housing 10. The limiting protrusions 11 slide in contact with the surface of the rotating shaft 30. The limiting protrusions 11 and the rotating shaft 30 cooperate to divide the interior of the housing 10 into two cavities to restrict the flow of damping oil. The surface of the rotating shaft 30 is provided with an edge 32 along the axial direction. A valve plate 40 is provided corresponding to the edge 32. The valve plate 40 has a U-shaped groove corresponding to the edge 32. The edge 32 is set in the U-shaped groove. A notch 41 is provided on one side of the U-shaped groove. There is a gap between the edge 32 and the inner wall of the U-shaped groove. The side of the valve plate 40 away from the edge 32 is slidably attached to the inner wall of the housing 10. In this embodiment, the edge 32 of the rotating shaft 30 and the valve plate 40 are used to divide the corresponding cavities into chamber A 13 and chamber B 14.

[0024] The housing 10 is fixed to the fixed component, and the rotating shaft 30 can be fixedly connected to the connecting shaft by selecting a suitable connecting shaft that passes through the rotating shaft 30.

[0025] Please refer to Figure 5When an external load forces the shaft 30 to rotate, the shaft 30 drives the edge 32 to rotate together toward the side of the valve plate 40 without the notch 41. This forces the volume of chamber A 13 in the housing 10 on one side of the valve plate 40 to decrease, increasing the pressure of the damping oil. This pushes the valve plate 40 to move in the opposite direction of the shaft 30 until the inner wall of the U-shaped groove fits against the side of the edge 32. This eliminates the end face gap between the U-shaped groove and the edge 32, preventing the damping oil from passing through the end face. At this point, the grease can only squeeze through the gap between the housing 10, the shaft 30, and the valve plate 40 to the other side of the valve plate 40, resulting in very low efficiency of the damping oil passage. This generates a large reaction force, preventing the shaft 30 from rotating, and ultimately forcing the external load to move slowly, thus producing a damping effect.

[0026] Please refer to Figure 6 When the external load reverses, it forces the shaft 30 to reverse as well. The shaft 30, along with the edge 32, rotates toward the side of the valve plate 40 with the notch 41. This forces the volume of the B chamber 14 inside the housing 10 on the other side of the edge 32 to decrease. The damping grease is compressed and generates a counter-thrust force, forcing the other side of the U-shaped groove of the valve plate 40 to adhere to the end face of the other side of the edge 32. The other side of the U-shaped groove has the notch 41, and during the rotation of the shaft 30, the end face that was originally attached to the U-shaped groove on the edge 32 separates from the shaft. This, in conjunction with the notch 41 on the other side of the U-shaped groove, creates a channel between the edge 32 and the U-shaped groove, connecting the A chamber 13 and B chamber 14 on both sides of the valve plate 40. Under pressure, the damping oil flows from the A chamber 13 on the side of the valve plate 40 that was originally under pressure to the B chamber 14 on the other side along the channel. Since the oil passage area of ​​the channel is much larger than that of the sealed state, the damping oil can flow quickly through the channel, generating very little reaction force. Externally, this means that it can be quickly restored with very little force.

[0027] The above structure allows for the connection of the required connecting shaft to the damper in different usage scenarios, while the damper also provides good damping performance.

[0028] In the above scheme, there are two edges 32, which are arranged opposite to each other in the housing 10 on both sides of the limiting boss 11. The number of valve plates 40 corresponds to the number of edges 32, so that the housing 10 and the limiting boss 11 form four corresponding chambers. When the rotating shaft 30 rotates, both sides can generate a damping effect, so that the rotating shaft 30 is balanced by force.

[0029] An overflow groove 33 is provided on one side of the notch 41 along the edge 32 of the rotating shaft 30. The overflow groove 33 gradually becomes shallower along the edge 32 toward the other side of the rotating shaft 30. The oil flow rate is adjusted by the overflow groove 33. As the oil flow rate decreases from deep to shallow, the oil pressure increases and the damping force increases accordingly.

[0030] The two ends of the rotating shaft 30 are respectively provided with sealing rings 34 for the housing 10 and the end cover 20, and the end cover 20 is provided with sealing rings 34 for the housing 10, thereby improving the overall sealing performance and avoiding the leakage of damping oil.

[0031] The through hole 31 has a rectangular cross-sectional shape, and the inner wall of the through hole 31 is provided with a protrusion 35. When the external connecting shaft is inserted into the through hole 31, the rectangular structure and the protrusion 35 can be used to restrict it, so as to prevent the connecting shaft and the rotating shaft 30 from rotating during the rotation. The housing 10 is provided with a mounting boss 12. Similarly, when the housing 10 is connected to the outside by the mounting boss 12, the housing 10 is restricted to prevent the housing 10 from rotating, so that the rotating shaft 30 and the housing 10 cannot rotate relative to each other, thus failing to produce a damping effect.

[0032] This utility model provides a damper with a hollow rotating shaft, which fixes the housing to a fixed component, and can be fixedly connected to the rotating shaft by selecting a suitable connecting shaft to pass through the rotating shaft.

[0033] When an external load forces the shaft to rotate, the shaft drives the edge to rotate towards the side of the valve plate without a notch. This forces the internal volume of the valve plate's housing to decrease, increasing the pressure of the damping oil. This pushes the valve plate in the opposite direction of the shaft until the inner wall of the U-shaped groove fits against the side of the edge. This eliminates the end face gap between the U-shaped groove and the edge, preventing the damping oil from passing through the end face. At this point, the oil can only be squeezed through the gap between the housing, shaft, and valve plate to the other side of the valve plate. This results in very low efficiency for the damping oil to pass through, generating a large reaction force that prevents the shaft from rotating. Ultimately, this forces the movement of the external load to be obstructed, slowing down its speed, thus producing a damping effect.

[0034] When the external load reverses, it forces the shaft to reverse as well. The shaft, with its edge, rotates towards the side of the valve plate with the notch, causing the internal volume of the housing on the other side of the edge to decrease. The damping grease is compressed and generates a counterforce, forcing the other side of the valve plate's U-shaped groove to fit against the end face of the other side of the edge. The other side of the U-shaped groove has a notch, and during the rotation of the shaft, the end face that was originally fitted with the U-shaped groove on one side of the edge separates, thus creating a channel between the edge and the U-shaped groove, connecting the internal contents of the housings on both sides of the valve plate. Under pressure, the damping grease flows from the housing on the side of the valve plate that was originally compressed to the other side along the channel. Because the oil passage area of ​​the channel is much larger than that in the sealed state, the damping grease can flow quickly through the channel, generating very little reaction force. Externally, this means that it can be quickly restored with very little force.

[0035] The above structure allows for the connection of the required connecting shaft to the damper in different usage scenarios, while the damper also provides good damping performance.

[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 damper with a hollow rotating shaft, characterized in that, The device includes a housing, an end cap, and a rotating shaft. The end cap is sealed to one side of the housing. The housing is filled with damping oil. The rotating shaft is located inside the housing and has a through hole in its center for mounting an external connecting shaft. Both ends of the rotating shaft extend out of the housing and the end cap, respectively, and are rotatably sealed to the end cap and the housing. The inner wall of the housing has two limiting bosses that slide in contact with the surface of the rotating shaft. The limiting bosses and the rotating shaft cooperate to divide the interior of the housing into two cavities to restrict the flow of the damping oil. The surface of the rotating shaft has an edge along its axial direction, and a valve plate is provided corresponding to the edge. The valve plate has a U-shaped groove corresponding to the edge, and the edge is located in the U-shaped groove. One side of the U-shaped groove has a notch, and there is a gap between the edge and the inner wall of the U-shaped groove. The side of the valve plate away from the edge slides against the inner wall of the housing.

2. A damper with a hollow rotating shaft as described in claim 1, characterized in that, The number of edges is two, and the two edges are disposed opposite each other in the housing on both sides of the limiting boss, and the number of valve plates corresponds to the number of edges.

3. A damper with a hollow rotating shaft as described in claim 1, characterized in that, An overflow groove is provided on one side of the notch along the edge of the rotating shaft surface, and the overflow groove gradually becomes shallower along the edge toward the other side of the rotating shaft.

4. A damper with a hollow rotating shaft as described in claim 3, characterized in that, The two ends of the rotating shaft are respectively provided with sealing rings for the housing and the end cover, and a sealing ring is provided between the end cover and the housing.

5. A damper with a hollow rotating shaft as described in claim 1, characterized in that, The through hole has a rectangular cross-sectional shape, and the inner wall of the through hole is provided with a raised strip.

6. A damper with a hollow rotating shaft as described in claim 1, characterized in that, The surface of the housing is provided with mounting bosses.

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