Rigidity-variable hydraulic shock absorber

Abstract

The utility model discloses a variable stiffness hydraulic shock absorber which comprises a main spring framework, a main spring arranged below the main spring framework, a top cover arranged below the main spring, an auxiliary spring arranged below the top cover, an inertia channel framework arranged below the auxiliary spring, a decoupling film arranged below the inertia channel framework and a cover plate arranged below the decoupling film. The lower liquid chamber film is arranged below the cover plate; the lower pressing plate is arranged below the lower liquid chamber film; an upper liquid chamber is formed between the main spring and the inertia channel framework; a lower liquid chamber is formed between the cover plate and the lower liquid chamber film; the upper liquid chamber is arranged between the main spring and the inertia channel framework, the lower liquid chamber is further arranged between the cover plate and the lower liquid chamber film, hydraulic oil is injected into the upper liquid chamber and the lower liquid chamber, and the hydraulic oil, the main spring and the auxiliary spring jointly achieve the vibration and noise reduction effect. And a good inhibition effect is achieved on low-frequency vibration and high-frequency vibration.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration reduction and noise reduction, and particularly relates to a variable stiffness hydraulic shock absorber. Background Art

[0002] Rubber shock absorbers are devices that use the elastic properties of rubber to reduce mechanical vibration, impact, and noise. They absorb and reflect vibration energy, preventing the propagation of vibration waves, thereby achieving the effects of shock absorption, noise reduction, and reducing the damage caused by impact.

[0003] Existing rubber vibration dampers are mainly pure rubber vibration dampers. Not only does their vibration isolation performance gradually deteriorate with the increase of vibration frequency, but when the load changes, the natural modal frequency of the vibration isolation system will change, resulting in changes in vibration isolation performance. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, a variable stiffness hydraulic shock absorber is proposed.

[0005] The technical solution adopted by the utility model is: to provide a variable stiffness hydraulic shock absorber, including a main spring frame, a main spring arranged under the main spring frame, a top cover arranged under the main spring, an auxiliary spring arranged under the top cover, an inertia channel frame arranged under the auxiliary spring, a decoupling membrane arranged under the inertia channel frame, a cover plate arranged under the decoupling membrane, a lower liquid chamber membrane arranged under the cover plate, and a lower pressure plate arranged under the lower liquid chamber membrane; an upper liquid chamber is formed between the main spring and the inertia channel frame; and a lower liquid chamber is formed between the cover plate and the lower liquid chamber membrane.

[0006] Preferably, the main spring is made of rubber.

[0007] Preferably, the inertial channel frame includes an inertial frame, and a channel hole is opened on the inertial frame.

[0008] Preferably, the decoupling membrane includes a membrane body and a support member arranged on the membrane body.

[0009] Preferably, the cover plate includes a plate member, and convection holes are provided on the plate member.

[0010] The beneficial effects of the utility model are:

[0011] The utility model not only sets an upper liquid chamber between the main spring and the inertia channel frame, but also sets a lower liquid chamber between the cover plate and the lower liquid chamber membrane. By injecting hydraulic oil into the upper liquid chamber and the lower liquid chamber, the hydraulic oil, the main spring and the auxiliary spring work together to reduce vibration and noise, which has a good inhibitory effect on both low-frequency vibration and high-frequency vibration, and can ensure that the natural modal frequency of the vibration isolation system remains unchanged under different load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the explosion structure of a variable stiffness hydraulic shock absorber according to the present utility model;

[0013] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure;

[0014] Figure 3 for Figure 1 Schematic diagram of the structure of the inertial channel skeleton;

[0015] Figure 4 for Figure 1 Schematic diagram of the structure of the decoupling membrane;

[0016] Figure 5 for Figure 1 Schematic diagram of the structure of the middle cover. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention generally described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0019] Unless otherwise defined, technical or scientific terms used in this patent document shall have the ordinary meanings understood by persons of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar expressions used in the specification and claims of this utility model do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a," "an," or "the" do not indicate a limitation of quantity, but rather indicate the presence of at least one. Terms such as "include" or "comprising" mean that the elements or objects preceding "include" or "comprising" include the elements or objects listed after "include" or "comprising," and their equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used solely to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are used solely to facilitate the description of the utility model and to simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0020] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0021] Example 1:

[0022] like Figure 1 and Figure 2 As shown, a variable stiffness hydraulic shock absorber is provided, including a main spring frame 10, a main spring 20 arranged under the main spring frame 10, a top cover 30 arranged under the main spring 20, a secondary spring 40 arranged under the top cover 30, an inertia channel frame 50 arranged under the secondary spring 40, a decoupling membrane 60 arranged under the inertia channel frame 50, a cover plate 70 arranged under the decoupling membrane 60, a lower liquid chamber membrane 80 arranged under the cover plate 70, and a lower pressure plate 90 arranged under the lower liquid chamber membrane 80; an upper liquid chamber 1 is formed between the main spring 20 and the inertia channel frame 50; and a lower liquid chamber 2 is formed between the cover plate 70 and the lower liquid chamber membrane 80.

[0023] Furthermore, after the main spring 20 is compressed to a certain extent, the auxiliary spring 40 contacts the inertia channel frame 50, thereby achieving variable stiffness.

[0024] Furthermore, the main spring 20 and the auxiliary spring 40 are both made of rubber and are vibration-damping bodies. The main spring 20 is vulcanizedly connected to the main spring frame 10 and the top cover 30 respectively.

[0025] Furthermore, the decoupling membrane 60 is arranged between the inertial channel skeleton 50 and the cover plate 70, mainly to reduce the noise caused by vibration reduction. During low-frequency and large-amplitude vibrations, the decoupling membrane 60 does not work. As the excitation frequency increases, the decoupling membrane 60 begins to work, and by swinging between the upper and lower limits of the inertial channel skeleton 50 and the cover plate 70, the hydraulic oil between the upper liquid chamber 1 and the lower liquid chamber 2 is stirred, thereby reducing the dynamic stiffness of the suspension and improving the vibration isolation performance under high-frequency and small-amplitude excitation.

[0026] like Figure 3 As shown, the inertial channel skeleton 50 includes an inertial skeleton 51 and a channel hole 52 is provided on the inertial skeleton 51 .

[0027] Furthermore, the hydraulic oil in the upper liquid chamber 1 and the lower liquid chamber 2 can flow up and down through the channel holes 52 on the inertial frame 51 .

[0028] like Figure 4 As shown, the decoupling membrane 60 includes a membrane body 61 and a support member 62 arranged on the membrane body 61 .

[0029] Furthermore, during low-frequency and large-amplitude vibration, the support member 62 on the membrane body 61 has a supporting and blocking effect on the inertial channel frame 50 and the cover plate 70 .

[0030] like Figure 5 As shown, the cover plate 70 includes a plate 71 and convection holes 72 formed on the plate 71 .

[0031] Furthermore, the hydraulic oil in the upper liquid chamber 1 and the lower liquid chamber 2 can also flow up and down through the convection holes 72 on the plate 71 .

[0032] like Figures 1 to 5 As shown, the working principle of the variable stiffness hydraulic shock absorber described in the present invention is as follows: the upper liquid chamber 1 and the lower liquid chamber 2 are filled with hydraulic oil. ① When the main spring 20 is subjected to low-frequency and large-amplitude motion from the outside, the decoupling membrane 60 is in a tightly fitted state with the inertia channel skeleton 50 and the cover plate 70, and the hydraulic oil can only flow between the upper liquid chamber 1 and the lower liquid chamber 2 through the channel hole 52 on the inertia skeleton 51. The shock absorber exhibits high stiffness and high damping characteristics, and has a good inhibitory effect on low-frequency vibrations; ② When the main spring top cover is subjected to high-frequency and small-amplitude motion from the outside, the hydraulic oil is in a quasi-stationary state in the channel hole 52, and the decoupling membrane 60 is in an open state with the inertia channel skeleton 50 and the cover plate 70. The hydraulic oil flows between the upper liquid chamber 1 and the lower liquid chamber 2 through the gaps around the decoupling membrane 60. The shock absorber exhibits low stiffness and low damping characteristics, and has a good inhibitory effect on high-frequency vibrations.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

Claims

1. A variable stiffness hydraulic shock absorber, characterized by: The invention comprises a main spring frame (10), a main spring (20) arranged under the main spring frame (10), a top cover (30) arranged under the main spring (20), a secondary spring (40) arranged under the top cover (30), an inertia channel frame (50) arranged under the secondary spring (40), a decoupling membrane (60) arranged under the inertia channel frame (50), a cover plate (70) arranged under the decoupling membrane (60), a lower liquid chamber membrane (80) arranged under the cover plate (70), and a lower pressure plate (90) arranged under the lower liquid chamber membrane (80); an upper liquid chamber (1) is formed between the main spring (20) and the inertia channel frame (50); and a lower liquid chamber (2) is formed between the cover plate (70) and the lower liquid chamber membrane (80).

2. The variable stiffness hydraulic shock absorber according to claim 1, characterized in that: The main spring (20) is made of rubber.

3. The variable stiffness hydraulic shock absorber according to claim 2, characterized in that: The inertial channel frame (50) comprises an inertial frame (51) and a channel hole (52) provided on the inertial frame (51).

4. The variable stiffness hydraulic shock absorber according to claim 3, characterized in that: The decoupling membrane (60) comprises a membrane body (61) and a support member (62) arranged on the membrane body (61).

5. The variable stiffness hydraulic shock absorber according to claim 4, characterized in that: The cover plate (70) comprises a plate member (71) and convection holes (72) provided on the plate member (71).

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