Blade type rotary damper

Abstract

The utility model discloses a blade type rotary damper which comprises a shell assembly and a rotating shaft assembly, the shell assembly and the rotating shaft assembly are matched to form two centrosymmetric high-pressure oil cavities and two centrosymmetric low-pressure oil cavities in the shell assembly, the two high-pressure oil cavities are communicated with each other, and the two low-pressure oil cavities are communicated with each other. The two high-pressure oil cavities are communicated with each other, the two low-pressure oil cavities are also communicated with each other, in the damping working process, the pressure difference between the first group of high-pressure oil cavities and low-pressure oil cavities which are matched with each other and the pressure difference between the second group of high-pressure oil cavities and low-pressure oil cavities which are matched with each other do not exist, and the internal pressure of the whole damper is balanced; and fluctuation in the working process is avoided, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to a damper, and more particularly to a blade-type rotary damper. Background Technology

[0002] Dampers are widely used in the bathroom fixtures industry, for example, installed on toilet seats to slow down their closure. The dampers used in this industry are primarily rotary vane type, with two high-pressure oil chambers and two low-pressure oil chambers arranged radially symmetrically. However, the two high-pressure chambers and two low-pressure chambers are relatively independent; during damping operation, oil from one high-pressure chamber flows only to one low-pressure chamber, and vice versa. However, due to pressure differences within the chambers, the pressure difference between the first pair of paired high-pressure and low-pressure chambers differs from that of the second pair. This directly leads to pressure imbalance during operation, causing fluctuations and accelerating component damage. Utility Model Content

[0003] This invention provides a blade-type rotary damper with internal pressure balance, overcoming the shortcomings of the prior art. The technical solution adopted by this invention to solve its technical problem is as follows:

[0004] A blade-type rotary damper includes a housing assembly and a shaft assembly, which cooperate to form two centrally symmetrical high-pressure oil chambers and two centrally symmetrical low-pressure oil chambers within the housing assembly. The two high-pressure oil chambers are interconnected, and the two low-pressure oil chambers are interconnected.

[0005] In a preferred embodiment: the rotating shaft assembly is provided with a low-pressure channel, and the two low-pressure oil chambers are connected through the low-pressure channel.

[0006] In a preferred embodiment: the low-pressure channel passes through the center of the shaft assembly.

[0007] In a preferred embodiment: the low-pressure channel is arranged radially.

[0008] In a preferred embodiment: the housing assembly is provided with a high-pressure channel, and the two high-pressure oil chambers are connected through the high-pressure channel.

[0009] In a preferred embodiment, the high-pressure channel is a groove located on the bottom wall of the inner cavity of the housing assembly.

[0010] In a preferred embodiment: a guide post is provided on the bottom wall of the inner cavity of the housing assembly, and a guide groove is provided at the bottom of the rotating shaft assembly, with the guide post inserted into the guide groove.

[0011] In a preferred embodiment: an oil passage groove is formed between the guide post and the guide groove; the housing assembly is provided with a high-pressure channel connecting the two high-pressure oil chambers; the high-pressure channel is a groove located on the bottom wall of the inner cavity of the housing assembly, and the groove connects to the guide groove; the rotating shaft assembly is provided with a low-pressure channel connecting the two low-pressure oil chambers; the rotating shaft assembly does not yet have an adjustment channel connecting the low-pressure channel and the guide groove; the head of a pin is threaded to the housing assembly, and the tail extends into the interior of the housing assembly, passes through the guide post and the guide groove, and then blocks the adjustment channel.

[0012] Compared with the prior art, this technical solution has the following advantages:

[0013] 1. The two high-pressure oil chambers are interconnected, and the two low-pressure oil chambers are also interconnected. During the damping operation, the pressure difference between the first pair of high-pressure oil chambers and the low-pressure oil chambers is not different from the pressure difference between the second pair of high-pressure oil chambers and the low-pressure oil chambers. The internal pressure of the entire damper is balanced, which avoids fluctuations during operation and extends the service life.

[0014] 2. A low-pressure channel is set on the shaft assembly and a high-pressure channel is set on the housing assembly to better ensure the strength of the shaft assembly and housing assembly and minimize the weakening of the damper's compressive capacity caused by the addition of low-pressure and high-pressure channels.

[0015] 3. Under normal circumstances, the pin closes the adjustment channel, and the damper performs its damping function during operation. When the pin is opened, the high-pressure oil chamber can be directly connected to the low-pressure oil chamber through the adjustment channel, thereby shutting off the damping effect. This facilitates maintenance and also makes it easy to disable the damping function of the damper. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 An axial cross-sectional schematic diagram of the blade-type rotary damper of this utility model is shown.

[0018] Figure 2 It is illustrated Figure 1 A partial three-dimensional schematic diagram of the shaft assembly of the blade-type rotary damper shown.

[0019] Figure 3 It is illustrated Figure 1 A three-dimensional schematic diagram of the housing assembly of the blade-type rotary damper shown.

[0020] Figure 4 It is illustrated Figure 1 The diagram shows a radial cross-section of the blade-type rotary damper in the low-pressure channel.

[0021] Figure 5 It is illustrated Figure 1 The diagram shows a cross section of a blade-type rotary damper with two high-pressure oil chambers connected together. Detailed Implementation

[0022] Please refer to Figures 1 to 5 The blade-type rotary damper includes a housing assembly 10 and a shaft assembly 20. These two components cooperate within the housing assembly to form two centrally symmetrical high-pressure oil chambers 30 and two centrally symmetrical low-pressure oil chambers 40. The formation and working principle of the high-pressure oil chambers are described in existing structures. One of the inventive aspects of this design is that the two high-pressure oil chambers 30 are interconnected, and the two low-pressure oil chambers 40 are also interconnected. Those skilled in the art will understand that "connected" indicates the presence of a transport channel, distinct from the gaps in the connection between parts. For example, in existing structures, during the rotation of the shaft assembly towards the low-pressure oil chamber, the connection channel between the high-pressure and low-pressure oil chambers is open. Therefore, oil from the low-pressure oil chamber can quickly enter the high-pressure oil chamber through the channel. However, during the rotation of the shaft assembly towards the high-pressure oil chamber, the connection channel between the high-pressure and low-pressure oil chambers is closed. Therefore, the high-pressure and low-pressure oil chambers are not connected, and oil from the high-pressure oil chamber can only slowly enter the low-pressure oil chamber through the gaps between the components. In this solution, the two high-pressure oil chambers 30 and the two low-pressure oil chambers 40 are interconnected. Therefore, during damping, the pressure in the two high-pressure oil chambers 30 is the same, resulting in balanced forces within the entire damper.

[0023] Preferably, the rotating shaft assembly 20 is provided with a low-pressure channel 22, and the two low-pressure oil chambers 40 are connected through the low-pressure channel 22. More preferably, the low-pressure channel 22 passes through the center of the rotating shaft assembly 20, that is, the low-pressure channel 22 directly penetrates the rotating shaft assembly. In this embodiment, the low-pressure channel 22 is arranged radially, so its length is the shortest.

[0024] Preferably, the housing assembly 10 is provided with a high-pressure channel 12, through which the two high-pressure oil chambers 30 are connected. More preferably, the high-pressure channel 12 is a groove located on the bottom wall of the inner cavity of the housing assembly 10.

[0025] Preferably, the bottom wall of the inner cavity of the housing assembly 10 is provided with a guide post 14, and the bottom of the rotating shaft assembly 20 is provided with a guide groove 24, and the guide post is inserted into the guide groove.

[0026] Preferably, an oil passage groove is formed between the guide post and the guide groove. The high-pressure channel 12 connects to the guide groove 24. The rotating shaft assembly 20 does not yet have an adjustment channel 26 connecting the low-pressure channel 22 and the guide groove 24. The head of a pin 50 is threaded onto the housing assembly 10, and the tail extends into the housing assembly, passing through the guide post and the guide groove, and then blocks the adjustment channel 26. Therefore, if the locking pin 50 is unscrewed to open the adjustment channel 26, then during the damping process, that is, during the compression of the high-pressure oil chamber, the oil in the high-pressure oil chamber will rapidly enter the low-pressure oil chamber 40 sequentially through the high-pressure channel 12, the oil passage groove, the adjustment channel 26, and the low-pressure channel 22.

[0027] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A blade-type rotary damper, comprising a housing assembly and a shaft assembly, wherein the two are fitted together within the housing assembly to form two centrally symmetrical high-pressure oil chambers and two centrally symmetrical low-pressure oil chambers, characterized in that: The two high-pressure oil chambers are interconnected, and the two low-pressure oil chambers are interconnected.

2. The blade-type rotary damper according to claim 1, characterized in that: The rotating shaft assembly is provided with a low-pressure channel, and the two low-pressure oil chambers are connected through the low-pressure channel.

3. The blade-type rotary damper according to claim 2, characterized in that: The low-pressure channel passes through the center of the shaft assembly.

4. The blade-type rotary damper according to claim 3, characterized in that: The low-pressure channel is arranged radially.

5. The blade-type rotary damper according to claim 1, characterized in that: The housing assembly is provided with a high-pressure channel, and the two high-pressure oil chambers are connected through the high-pressure channel.

6. The blade-type rotary damper according to claim 5, characterized in that: The high-pressure channel is a groove located on the bottom wall of the inner cavity of the housing assembly.

7. The blade-type rotary damper according to claim 1, characterized in that: The housing assembly has a guide post on the bottom wall of its inner cavity, and the rotating shaft assembly has a guide groove at its bottom, with the guide post inserted into the guide groove.

8. The blade-type rotary damper according to claim 7, characterized in that: An oil passage groove is formed between the guide post and the guide groove. The housing assembly is provided with a high-pressure channel connecting the two high-pressure oil chambers. The high-pressure channel is a groove located on the bottom wall of the inner cavity of the housing assembly. The groove connects to the guide groove. The rotating shaft assembly is provided with a low-pressure channel connecting the two low-pressure oil chambers. The rotating shaft assembly does not yet have an adjustment channel connecting the low-pressure channel and the guide groove. The head of a pin is threaded to the housing assembly, and the tail extends into the inside of the housing assembly, passes through the guide post and the guide groove, and then blocks the adjustment channel.

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