Vibration damper, vibration damping system and refrigeration equipment

Abstract

The utility model relates to a shock absorber, a shock absorption system and refrigeration equipment, the shock absorber comprises a cylinder body and piston assemblies, a plurality of cavities are formed in the cylinder body, the multiple piston assemblies and the multiple cavities are arranged in a one-to-one correspondence mode, each piston assembly comprises a first piston, and the first pistons are arranged in the cavities in a sliding mode; the first pistons are used for being connected with a component to be subjected to vibration reduction. According to the shock absorber, the multiple first pistons are connected with the component to be subjected to shock absorption, when the first pistons slide in the cavity, the pressure of the fluid medium in the cavity changes under the action of the first pistons, vibration energy can be buffered and absorbed, and therefore the shock absorption effect on the component to be subjected to shock absorption is achieved. Due to the fact that the first piston is arranged in each cavity, multi-point vibration reduction supporting can be achieved through the multiple first pistons and the component to be subjected to vibration reduction, and therefore multi-point and multi-area vibration reduction is achieved.

Description

Technical Field

[0001] The present application relates to the field of vibration reduction technology, and in particular to a vibration reducer, a vibration reduction system and a refrigeration device. Background Art

[0002] Traditional shock absorbers typically consist of a cylinder and a piston pushrod. A diaphragm divides the interior of the cylinder into two chambers, each filled with the same fluid. The diaphragm has an opening that allows the fluid to flow between the two chambers. The piston pushrod is located in one chamber on one side of the cylinder. When the piston pushrod is subjected to an external force and slides within the chamber, the fluid in that chamber is forced by the piston pushrod and passes through the diaphragm opening into the other chamber, thereby achieving the shock absorber's cushioning and vibration reduction function.

[0003] Since the structure of the above-mentioned shock absorber is similar to that of a pneumatic cylinder or a hydraulic cylinder, only single-point vibration reduction can be achieved by expanding and contracting the shock absorber. If multi-point and multi-area vibration reduction is required, multiple shock absorbers need to be installed simultaneously and connected to the components to be damped, which will increase the equipment cost. Utility Model Content

[0004] The present application provides a vibration damper, a vibration damping system and a refrigeration device to solve the technical problem that the vibration damper in the prior art cannot achieve multi-point and multi-region vibration damping.

[0005] In a first aspect, the present application provides a shock absorber, comprising:

[0006] A cylinder body, wherein a plurality of cavities are formed in the cylinder body;

[0007] A piston assembly, wherein the plurality of piston assemblies are arranged in one-to-one correspondence with the plurality of cavities, the piston assembly comprises a first piston, and the first piston is slidably arranged in the cavity; the plurality of first pistons are used to connect with the component to be damped.

[0008] Optionally, the axes of the multiple cavities are parallel.

[0009] Optionally, the multiple cavities are evenly distributed in the cylinder body, and the cross-sectional areas of the multiple cavities are equal.

[0010] Optionally, the piston assembly further includes a second piston slidably disposed in the cavity, the first piston and the second piston are disposed opposite to each other, and a first chamber is formed between the first piston and the second piston.

[0011] Optionally, a plurality of channels are opened in the cylinder body, and two adjacent first chambers are connected through the channels.

[0012] Optionally, a valve member is provided in the channel.

[0013] Optionally, a second chamber is formed between the first piston and the inner wall of the cavity, a third chamber is formed between the second piston and the inner wall of the cavity, and the second chamber and the third chamber are respectively located on both sides of the first chamber.

[0014] Optionally, a plurality of pressure regulating holes are provided on the cylinder body, and the pressure regulating holes are communicated with the second chamber or the third chamber.

[0015] Optionally, a plurality of three-way flow channels are opened in the cylinder body, and two adjacent second chambers or two adjacent third chambers are connected to the pressure regulating hole through the three-way flow channels.

[0016] Optionally, the first piston and the second piston each include a connected piston body and a piston rod, an end of the cylinder body is provided with a piston rod through hole, and a sealing member is provided on the piston rod through hole.

[0017] Optionally, a plurality of pressure regulating holes and a plurality of piston rod through holes are alternately arranged at the end of the cylinder body.

[0018] Optionally, the shock absorber further includes a load-bearing connection member for connecting to the component to be damped, the plurality of first pistons are connected to the load-bearing connection member, and the load-bearing connection member is a flexible member.

[0019] Optionally, the shock absorber further includes a base, and the plurality of second pistons are connected to the base.

[0020] Optionally, the shock absorber further includes an elastic sleeve, which is sleeved on the outside of the cylinder body, one end of the elastic sleeve is connected to the load-bearing connector, and the other end of the elastic sleeve is connected to the base.

[0021] Optionally, the wall of the elastic sleeve is configured as a corrugated structure.

[0022] In the second aspect, the present application provides a vibration reduction system, including the vibration damper provided in the first aspect of the present application, and also including an active vibration reduction component, the active vibration reduction component includes a driving member and multiple pipelines, the multiple pipelines are correspondingly connected to multiple cavities, and the driving member realizes the input or output of the fluid medium in the cavity through the pipeline.

[0023] Optionally, the vibration reduction system further includes a control component and a plurality of pressure detection components, the plurality of pressure detection components are correspondingly arranged in the plurality of cavities, and the driving component and the plurality of pressure detection components are all connected to the control component signal.

[0024] In a third aspect, the present application provides a refrigeration device, including the vibration damper provided in the first aspect of the present application;

[0025] Alternatively, it includes the vibration reduction system provided in the second aspect of this application.

[0026] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0027] The vibration damper provided in an embodiment of the present application has multiple cavities defined within a cylinder, each of which is provided with a corresponding piston assembly. The piston assembly includes a first piston slidably disposed within the cavity, which is filled with a fluid medium. The multiple first pistons are used to connect to the component to be damped. When the first pistons slide within the cavity, the fluid medium within the cavity undergoes pressure changes under the action of the first pistons, which can buffer and absorb vibration energy, thereby providing a vibration damping effect on the component to be damped. Because each cavity is provided with a first piston, multiple first pistons and the component to be damped can achieve multi-point vibration damping support, thereby achieving multi-point, multi-region vibration damping. When different parts of the component to be damped are subjected to different degrees of vibration impact or tension, the relative sliding degrees between the multiple piston assemblies and the cylinder vary, and the pressure changes of the fluid medium within the multiple cavities also vary. Consequently, the multiple cavities apply different damping forces to their corresponding first pistons, thereby achieving corresponding vibration damping according to the vibration levels of different regions of the component to be damped. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0031] Figure 1 A partial cross-sectional view of a shock absorber provided in an embodiment of the present application;

[0032] Figure 2 A cross-sectional view of a shock absorber provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of the cylinder provided in an embodiment of the present application;

[0034] Figure 4 A top view of a cylinder provided in an embodiment of the present application;

[0035] Figure 5 A front view of a shock absorber provided in an embodiment of the present application (without the elastic sleeve);

[0036] Figure 6 A force analysis diagram of a single cavity provided in an embodiment of the present application;

[0037] Figure 7 Schematic diagram of the vibration reduction system provided in an embodiment of the present application (the dotted lines in the figure represent signal connections, and the solid lines represent pipeline connections).

[0038] Description of reference numerals:

[0039] 1. Cylinder body; 11. Cavity; 111. First chamber; 112. Second chamber; 113. Third chamber; 12. Passageway; 13. Valve; 14. Pressure regulating hole; 15. Three-way flow channel; 16. Piston rod through hole;

[0040] 2. Piston assembly; 21. First piston; 211. Piston body; 212. Piston rod; 22. Second piston;

[0041] 3. Load-bearing connectors;

[0042] 4. Base;

[0043] 5. Elastic sleeve;

[0044] 6. Active vibration reduction assembly; 61. Driving component; 62. Pipeline;

[0045] 7. Control components;

[0046] 8. Pressure detection component; 81. First pressure sensor; 82. Second pressure sensor; 83. Third pressure sensor. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0049] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0050] In order to solve the technical problem that the shock absorber in the prior art cannot achieve multi-point and multi-zone vibration reduction, the present application provides a shock absorber, a vibration reduction system and a refrigeration device, which can achieve multi-point support connection and multi-zone vibration reduction by setting multiple cavities 11 in the cylinder body 1 and correspondingly setting a piston assembly 2 in each cavity 11.

[0051] See also Figures 1 to 7 In a first aspect, an embodiment of the present application provides a shock absorber, comprising a cylinder 1 and a piston assembly 2, wherein the cylinder 1 is provided with a plurality of cavities 11, such as Figure 1 、 Figure 2 and Figure 3 shown.

[0052] Multiple piston assemblies 2 are arranged in a one-to-one correspondence with multiple cavities 11, and the piston assemblies 2 are movable relative to the cylinder body 1. Specifically, the piston assembly 2 includes a first piston 21, which is slidably disposed in the cavity 11. The multiple first pistons 21 are used to connect with the component to be damped. The cavity 11 is filled with a fluid medium. When the first piston 21 slides within the cavity 11, the fluid medium within the cavity 11 undergoes pressure changes under the action of the first piston 21, which can achieve buffering and absorption of vibration energy, thereby providing a vibration reduction effect on the component to be damped.

[0053] It should be noted that since each cavity 11 is provided with a first piston 21, multiple first pistons 21 and the component to be damped can achieve multi-point vibration damping support, thereby achieving multi-point, multi-region vibration damping. When different regions of the component to be damped experience different levels of vibration impact or tension, the relative slippage between the multiple piston assemblies 2 and the cylinder 1 will vary, and the pressure changes of the fluid medium within the multiple cavities 11 will also vary. Consequently, the multiple cavities 11 will apply different damping forces to their corresponding first pistons 21, thereby achieving corresponding vibration damping according to the vibration levels of different regions of the component to be damped.

[0054] It should be noted that the arrangement of the multiple cavities 11 in the cylinder body 1 can be designed according to the direction in which the component to be damped is easily impacted or pulled, so that the multiple piston assemblies 2 can provide vibration reduction support along the main vibration direction of the component to be damped.

[0055] In some embodiments of the present application, since the vibration direction of the component to be damped is mainly vertical, it is preferred that the multiple cavities 11 in the cylinder body 1 are arranged in such a way that the axes of the multiple cavities 11 are parallel, such as Figure 1 、 Figure 2 and Figure 3 When multiple piston assemblies 2 are correspondingly arranged in multiple cavities 11 with parallel axes, the vibration-damping component can be supported and connected along the same direction.

[0056] Specifically, when the axis directions of the multiple cavities 11 are vertical, the multiple cavities 11 with vertical axis directions can provide vertical damping force for the first piston 21, thereby achieving a vibration reduction effect on the vibration reduction component in the main vibration direction.

[0057] In some embodiments of the present application, the piston assembly 2 further includes a second piston 22 slidably disposed in the cavity 11, the first piston 21 and the second piston 22 are disposed opposite each other, and a first chamber 111 is formed between the first piston 21 and the second piston 22, and the first chamber 111 is filled with a fluid medium. When the first piston 21 and / or the second piston 22 slide within the cavity 11, the fluid medium within the first chamber 111 undergoes pressure changes under the action of the first piston 21 and / or the second piston 22, which can buffer and absorb vibration energy, thereby having a vibration reduction effect on the component to be damped. When the first piston 21 is impacted or pulled by the component to be damped, the first chamber 111 applies resistance (i.e., damping force) to the first piston 21.

[0058] It should be noted that when the degree of expansion and contraction of multiple piston assemblies 2 in the vertical direction is different, the fluid medium pressure inside the multiple first chambers 111 is also different, which causes the damping force applied by the first chamber 111 to the corresponding piston assembly 2 to be different. Compared with the shock absorber in the prior art, not only can the change of the piston assembly 2 in the height direction be achieved, but also the damping adjustment of different cavities 11 inside the cylinder body 1 can be achieved, thereby making the damping inside the cylinder body 1 of the present application adjustable, which is beneficial to ensuring the vibration reduction effect of the shock absorber.

[0059] In the above embodiment, the cross-sectional areas of the multiple cavities 11 can be designed according to the mass distribution of the component to be damped. When the pressure of the fluid medium inside the multiple first chambers 111 is the same, the larger the cross-sectional area of ​​the cavity 11, the greater the damping force applied by the first chamber 111 to the corresponding piston assembly 2, which can be used to provide vibration reduction support to the area with a larger mass distribution of the component to be damped.

[0060] In some embodiments of the present application, when the mass distribution of the component to be damped is relatively uniform, multiple cavities 11 are evenly distributed in the cylinder body 1, and the cross-sectional areas of the multiple cavities 11 are equal, which can be used to achieve multi-point uniform vibration damping support for the component to be damped, and at the same time reduce the difficulty of manufacturing the cylinder body 1.

[0061] In the above embodiment, the cylinder body 1 can be a prism or a cylinder, and multiple cavities 11 are evenly distributed in the cylinder body 1, and the axial direction of the cavity 11 is parallel to the axial direction of the cylinder body 1, so that the multiple piston assemblies 2 can be extended and retracted along the axial direction of the cylinder body 1, thereby achieving buffering and vibration reduction of the vibration-damping components.

[0062] As a specific embodiment of the present application, the cylinder body 1 is a quadrangular prism (i.e., a rectangular parallelepiped), and a plurality of cavities 11 are distributed in the cylinder body 1 in a matrix manner, such as Figure 1 、 Figure 3 and Figure 4 As shown, a uniform vibration-damping support can be formed for the component to be damped.

[0063] In some embodiments of this application, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A plurality of channels 12 are provided in the cylinder body 1 , and two adjacent first chambers 111 are connected through the channels 12 . The plurality of first chambers 111 can be connected in series through the channels 12 to facilitate stiffness adjustment of the shock absorber.

[0064] Specifically, stiffness refers to the elastic properties of a shock absorber when subjected to pressure. The greater the stiffness, the greater the shock absorber's ability to recover from impact. However, excessive stiffness can lead to a decrease in the vibration damping effect. When the pressure of the fluid medium within the first chamber 111 is high, the corresponding stiffness of the cavity 11 in which it is located is greater. When the pressure of the fluid medium within the first chamber 111 is low, the corresponding stiffness of the cavity 11 in which it is located is smaller. When the pressure between two adjacent first chambers 111 differs due to different stress conditions, the two adjacent first chambers 111 can be connected through the channel 12, and the fluid medium flows from the first chamber 111 on the high-pressure side to the first chamber 111 on the low-pressure side, thereby achieving stiffness adjustment of the two adjacent first chambers 111. When all first chambers 111 are connected in series through the channel 12, the fluid medium in multiple first chambers 111 can be circulated, thereby achieving stiffness adjustment of multiple cavities 11, and thus achieving overall stiffness adjustment of the shock absorber.

[0065] In some embodiments of this application, please refer to Figure 2 , a valve member 13 is provided in the channel 12, which can be used to realize the on-off control of the channel 12, thereby realizing the switching of the connection status between the multiple first chambers 111. Specifically, when all the valve members 13 are open, all the first chambers 111 in the cylinder body 1 are interconnected and connected in series. When the shock absorber is impacted or pulled, the fluid medium inside all the first chambers 111 can be circulated. After a certain period of time, the pressure of the fluid medium inside the multiple first chambers 111 reaches the same state (that is, the pressure value is the same). When all the valve members 13 are closed, the first chambers 111 in the multiple cavities 11 are in a parallel state, and the fluid medium pressures between the various first chambers 111 do not affect each other, so that the stiffness between the multiple cavities 11 can be different. When the valve member 13 is partially closed, multiple groups of parallel cavity units can be formed, and the stiffness of each group of cavity units may be different; each group of cavity units includes one or more cavities 11; when a group of cavity units includes multiple cavities 11, the first chamber 111 of the multiple cavities 11 in the cavity unit is in a series state.

[0066] It should be noted that the opening and closing of the valve member 13 can be controlled according to the vibration reduction working condition, so that the multiple cavities 11 inside the shock absorber are connected in series and / or in parallel, which can realize diversified adjustment of the shock absorber stiffness and thus achieve a multifunctional vibration reduction effect.

[0067] In the above embodiment, the valve member 13 may be a wireless throttle valve, and the opening and closing or valve opening degree of the wireless throttle valve may be remotely controlled to facilitate on-off control and flow regulation between two adjacent first chambers 111 .

[0068] In some embodiments of this application, please refer to Figure 1 、 Figure 2 and Figure 6 A second chamber 112 is formed between the first piston 21 and the inner wall of the cavity 11, and a third chamber 113 is formed between the second piston 22 and the inner wall of the cavity 11. The second chamber 112 and the third chamber 113 are respectively located on both sides of the first chamber 111. There is a first pressure difference between the second chamber 112 and the first chamber 111, which can be used to apply resistance to the first piston 21 when the first piston 21 is impacted or pulled; a second pressure difference between the second chamber 112 and the third chamber 113 can be used to apply a force to the inner wall of the cavity 11, driving the cylinder body 1 to move, so that the cylinder body 1 can become a damping block that consumes vibration energy.

[0069] In some embodiments of the present application, the second chamber 112, the first chamber 111, and the third chamber 113 are sequentially arranged along the axial direction of the cavity 11. When the axial direction of the cavity 11 is a vertical direction, the second chamber 112, the first chamber 111, and the third chamber 113 are sequentially arranged along the height direction; wherein the first chamber 111 is the middle chamber inside the cavity 11, the second chamber 112 is the upper chamber inside the cavity 11, and the third chamber 113 is the lower chamber inside the cavity 11, as shown in FIG. Figure 2 and Figure 6 shown.

[0070] In the above embodiment, the shock absorber can perform adaptive vibration reduction according to the impact or pulling conditions. For a single cavity 11, please refer to Figure 6 , the fluid medium pressure inside the first chamber 111 is recorded as P1, the fluid medium pressure inside the second chamber 112 is recorded as P2, and the fluid medium pressure inside the third chamber 113 is recorded as P3. In the vertical direction, the force F1 = P1·S applied by the first chamber 111 on the first piston 21 or the second piston 22; the force F2 = P2·S applied by the second chamber 112 on the first piston 21 or the inner wall of the cavity 11; the force F3 = P3·S applied by the third chamber 113 on the second piston 22 or the inner wall of the cavity 11; where S is the cross-sectional area of ​​the cavity 11.

[0071] In some embodiments of the present application, the gravity component of the component to be damped borne by a single cavity 11 is recorded as G1, and the gravity component of the cylinder 1 corresponding to the single cavity 11 is recorded as G2. When the shock absorber is in a balanced state, according to the static equilibrium force analysis, the following expressions exist: F1=F2+G1 (with the first piston 21 as the analysis object); F2=F3+G2 (with the cylinder 1 as the analysis object).

[0072] When the first piston 21 is subjected to a downward impact force, it will drive the first piston 21 downward. At this time, the fluid medium in the first chamber 111 is compressed, causing the pressure P1 to increase, and the second chamber 112 expands due to the volume, causing the fluid medium pressure P2 to decrease. At this time, F1>F2+G1, and the first chamber 111 will apply an upward resistance to the first piston 21, preventing the first piston 21 from moving further downward. At the same time, due to the decrease in P2, the upward force F2 exerted by the second chamber 112 on the cylinder body 1 also decreases, causing the cylinder body 1 to move downward. When the second piston 22 is in a stationary state, the third chamber 113 will expand due to the downward movement of the cylinder body 1, causing the pressure P3 to decrease as the cylinder body 1 moves downward. The downward force F3 exerted by the third chamber 113 on the cylinder body 1 will also gradually decrease and gradually return to the equilibrium state of F2=F3+G2, preventing the cylinder body 1 from moving further downward.

[0073] When the first piston 21 is subjected to an upward pulling force, it will drive the first piston 21 upward. At this time, the volume of the first chamber 111 will expand, causing the fluid medium pressure P1 to decrease. The fluid medium in the second chamber 112 will be compressed, causing P2 to increase. At this time, F1 < F2 + G1, and the first chamber 111 will apply a downward resistance to the first piston 21, preventing the first piston 21 from moving further upward. At the same time, due to the increase in P2, the upward force F2 exerted by the second chamber 112 on the cylinder body 1 will also increase, causing the cylinder body 1 to move upward. When the second piston 22 is in a stationary state, the third chamber 113 will shrink due to the upward movement of the cylinder body 1, causing the pressure P3 to increase as the cylinder body 1 moves upward. The downward force F3 exerted by the third chamber 113 on the cylinder body 1 will also gradually increase and gradually return to the equilibrium state of F2 = F3 + G2, preventing the cylinder body 1 from moving further upward.

[0074] In the above embodiment, the multi-cavity cylinder 1 moves accordingly with the movement of the first piston 21, so that the multi-cavity cylinder 1 becomes a damping block, which can realize the consumption of vibration energy.

[0075] In some embodiments of this application, please refer to Figure 1 、 Figure 3 and Figure 4 A plurality of pressure regulating holes 14 are provided on the cylinder body 1, and the pressure regulating holes 14 are connected to the second chamber 112 or the third chamber 113. Fluid medium can be input or output to the second chamber 112 and / or the third chamber 113 through the pressure regulating holes 14, so as to adjust the pressure of the fluid medium inside the second chamber 112 and / or the third chamber 113, thereby realizing active vibration reduction according to the force conditions of the shock absorber.

[0076] Specifically, a plurality of pressure regulating holes 14 are provided at both ends of the cylinder body 1. The pressure regulating hole 14 at the upper end of the cylinder body 1 is used to communicate with the second chamber 112, and the pressure regulating hole 14 at the lower end of the cylinder body 1 is used to communicate with the third chamber 113. Figure 3 shown.

[0077] In some embodiments of the present application, when the second chamber 112 at the top of the cavity 11 outputs the fluid medium through the pressure regulating hole 14, the fluid medium pressure P2 in the second chamber 112 decreases, thereby causing the downward force F2 exerted by the second chamber 112 on the first piston 21 to decrease. Since G1 remains unchanged, at this time F1>F2+G1, the upward force on the first piston 21 is greater than the downward force, and the first piston 21 will move upward. During the upward movement of the first piston 21, the volume of the first chamber 111 gradually expands, causing the fluid medium pressure P1 inside the first chamber 111 to gradually decrease. The upward force F1 exerted by the first chamber 111 on the first piston 21 also gradually decreases and gradually returns to the equilibrium state of F1=F2+G1, and the first piston 21 stops moving.

[0078] At the same time, when the second chamber 112 outputs the fluid medium through the pressure regulating hole 14, causing P2 to decrease, the upward force F2 exerted by the second chamber 112 on the cylinder body 1 also decreases. Since G2 remains unchanged, at this time F2<F3+G2, the downward force on the cylinder body 1 is greater than the upward force, which will cause the cylinder body 1 to move downward. Since the second piston 22 remains stationary, during the downward movement of the cylinder body 1, the third chamber 113 expands its volume, causing the fluid medium pressure P3 to gradually decrease. The downward force F3 exerted by the third chamber 113 on the cylinder body 1 decreases and gradually returns to the equilibrium state of F2=F3+G2, and the cylinder body 1 stops moving.

[0079] Similarly, in some embodiments of the present application, when the third chamber 113 at the lower part of the cavity 11 outputs the fluid medium through the pressure regulating hole 14, the fluid medium pressure P3 inside the third chamber 113 decreases, which will cause the downward force F3 exerted by the third chamber 113 on the cylinder body 1 to decrease. At this time, F2>F3+G2, and the upward force on the cylinder body 1 is greater than the downward force, which will cause the cylinder body 1 to move upward; in the process of the cylinder body 1 moving upward, the second chamber 112 will cause P2 to decrease due to volume expansion, and the upward force F2 exerted by the second chamber 112 on the cylinder body 1 will also gradually decrease, and gradually return to the equilibrium state of F2=F3+G2, and the cylinder body 1 stops moving.

[0080] At the same time, when the volume of the second chamber 112 decreases due to P2, the downward force F2 exerted by the second chamber 112 on the first piston 21 also decreases. At this time, F1>F2+G1, and the upward force on the first piston 21 is greater than the downward force, which will cause the first piston 21 to move upward; in the process of the first piston 21 moving upward, the fluid medium pressure P1 of the first chamber 111 decreases due to the volume expansion, and the upward force F1 exerted by the first chamber 111 on the first piston 21 also gradually decreases and gradually returns to the equilibrium state of F1=F2+G1, and the first piston 21 stops moving.

[0081] In some embodiments of the present application, when the second chamber 112 at the top of the cavity 11 inputs fluid medium through the pressure regulating hole 14, the fluid medium pressure P2 inside the second chamber 112 increases, and the downward force F2 applied to the first piston 21 also increases. At this time, F1 is less than F2+G1, and the upward force applied to the first piston 21 is less than the downward force, which will cause the first piston 21 to move downward; during the downward movement of the first piston 21, the first chamber 111 is compressed, causing the fluid medium pressure P1 to gradually increase, and gradually return to the equilibrium state of F1=F2+G1, and the first piston 21 stops moving.

[0082] At the same time, when the second chamber 112 causes the fluid medium to be input through the pressure regulating hole 14, causing P2 to increase, the upward force F2 exerted by the second chamber 112 on the cylinder body 1 also increases. At this time, F2>F3+G2, and the upward force on the cylinder body 1 is greater than the downward force, which will cause the cylinder body 1 to move upward. Since the second piston 22 remains stationary, during the upward movement of the cylinder body 1, the third chamber 113 causes the fluid medium pressure P3 to gradually increase due to volume compression, and gradually returns to the equilibrium state of F2=F3+G2, and the cylinder body 1 stops moving.

[0083] Similarly, in some embodiments of the present application, when the third chamber 113 in the lower part of the cavity 11 inputs fluid medium through the pressure regulating hole 14, the fluid medium pressure P3 inside the third chamber 113 increases, which will cause the downward force F3 exerted by the third chamber 113 on the cylinder body 1 to increase. At this time, F2 is less than F3+G2, and the downward force on the cylinder body 1 is greater than the upward force, which will cause the cylinder body 1 to move downward; in the process of the cylinder body 1 moving downward, the second chamber 112 will be compressed and P2 will increase, and the upward force F2 exerted by the second chamber 112 on the cylinder body 1 will also gradually increase, and gradually return to the equilibrium state of F2=F3+G2, and the cylinder body 1 stops moving.

[0084] At the same time, when the volume of the second chamber 112 is compressed and P2 increases, the downward force F2 exerted by the second chamber 112 on the first piston 21 also increases. At this time, F1 is less than F2+G1, and the downward force on the first piston 21 is greater than the upward force, which will cause the first piston 21 to move downward. During the downward movement of the first piston 21, the volume of the first chamber 111 is compressed, causing the fluid medium pressure P1 to increase, and gradually returns to the equilibrium state of F1=F2+G1, and the first piston 21 stops moving.

[0085] In the above embodiment, the pressure regulating hole 14 is used to connect to the active vibration reduction assembly 6 in the vibration reduction system to enable the input or output of a fluid medium, thereby realizing active vibration reduction modes under different operating conditions. The fluid medium can be gas or liquid. Due to the strong compressibility of gas, gas is preferably used as the fluid medium filling the vibration damper cavity 11. The pressure regulating hole 14 can be used to enable air to enter or exit the second chamber 112 and the third chamber 113.

[0086] In some embodiments of the present application, it can be seen from F1=F2+G1 that when P1 is larger, the stiffness of the shock absorber is greater, and the gravity or impact force of the component to be damped that can be borne is greater. When the stiffness of the first chamber 111 needs to be adjusted, it can also be adjusted through the pressure regulating hole 14 to facilitate the adjustment of the hardness of the shock absorber.

[0087] Specifically, when it is necessary to increase the stiffness of the first chamber 111, a fluid medium can be input into the second chamber 112 or the third chamber 113 through the pressure regulating hole 14, which can directly or indirectly increase P2. From the above embodiment, it can be seen that there is a proportional relationship between P1 and P2, so P1 will increase as P2 increases, thereby improving the stiffness of the first chamber 111.

[0088] When the stiffness of the first chamber 111 needs to be reduced, the fluid medium inside the second chamber 112 or the third chamber 113 can be output through the pressure regulating hole 14, which can directly or indirectly reduce P2, and P1 will decrease as P2 decreases, thereby reducing the stiffness of the first chamber 111.

[0089] It should be noted that when the multiple valve components 13 inside the cylinder body 1 are in a closed state, the fluid medium pressures inside the multiple first chambers 111 are respectively recorded as P1-1, P1-2, P1-3...P1-n, where n is the total number of first chambers 111 in the cylinder body 1 (that is, the total number of cavities 11). The fluid medium pressure in each first chamber 111 can be independently adjusted by the above-mentioned stiffness adjustment method, which is suitable for working conditions requiring high-stiffness shock absorbers. When the fluid medium pressure P1 in each first chamber 111 is adjusted to the maximum, the stiffness of the shock absorber is the maximum and the damping is the minimum, but the shock absorber runs the most smoothly, which is suitable for working conditions where the components to be damped are heavy and the shock absorber needs to maintain a stable state.

[0090] When the multiple valve components 13 inside the cylinder body 1 are all in the open state, the fluid medium inside each first chamber 111 is the same, specifically P1 = (P1-1+P1-2+P1-3+...P1-n) / n. At this time, the shock absorber has a small stiffness and a large damping, which can be used to fully dissipate the energy generated by the vibration. It is suitable for working conditions where the mass of the component to be damped is small or the component to be damped is in a bumpy state.

[0091] In the above embodiments, the pressure regulating hole 14 can be set in a one-to-one correspondence with the second chamber 112 or the third chamber 113, or the pressure regulation of multiple second chambers 112 or multiple third chambers 113 can be achieved simultaneously through one pressure regulating hole 14, both of which can achieve the purpose of this application.

[0092] In some preferred embodiments of this application, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A plurality of three-way flow channels 15 are provided in the cylinder body 1, and two adjacent second chambers 112 or two adjacent third chambers 113 are connected to the pressure regulating hole 14 through the three-way flow channels 15. The pressure regulation of the two second chambers 112 or the two third chambers 113 can be simultaneously achieved through one pressure regulating hole 14, which can reduce the number of pressure regulating holes 14 on the cylinder body 1 and reduce the manufacturing difficulty of the cylinder body 1.

[0093] In some embodiments of this application, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4The first piston 21 and the second piston 22 each include a connected piston body 211 and a piston rod 212, wherein the piston body 211 is a plate-like structure that matches the cross-section of the cavity 11 and can be used to enclose the inner wall of the cavity 11 to form the first chamber 111. The piston rod 212 is connected to the piston body 211. A piston rod through hole 16 is provided at the end of the cylinder body 1 to facilitate the piston rod 212 to extend out of the cavity 11 and connect with the component to be damped or the base 4. A seal is provided on the piston rod through hole 16 to prevent leakage of the fluid medium in the second chamber 112 or the third chamber 113, which affects the pressure regulation accuracy of the second chamber 112 and the third chamber 113. Specifically, the seal is a sealing ring that matches the piston rod 212 and can be sleeved on the outside of the piston rod 212 to achieve a sealed connection between the piston rod 212 and the piston rod through hole 16.

[0094] In some embodiments of this application, please refer to Figure 1 、 Figure 3 and Figure 4 , multiple pressure regulating holes 14 and multiple piston rod through holes 16 are alternately arranged at the end of the cylinder body 1, which can achieve a reasonable layout of the pressure regulating holes 14 and the piston rod through holes 16 at the end of the cylinder body 1, avoiding interference between the piston rod 212 and the fluid medium pipeline 62 connected to the pressure regulating hole 14, and affecting the normal operation of the shock absorber.

[0095] In the above embodiment, the piston rods 212 of the first pistons 21 in the multiple cavities 11 can be directly connected to the component to be damped. Because the multiple first pistons 21 may have varying degrees of expansion and contraction, the connection between the first pistons 21 and the component to be damped is preferably a hinged or sliding connection. Alternatively, the multiple first pistons 21 can be indirectly connected to the component to be damped via the same component, thereby achieving multi-point vibration damping support for the component to be damped.

[0096] In some embodiments of this application, please refer to Figure 2 、 Figure 5 and Figure 6 The shock absorber also includes a load-bearing connector 3 for connecting to the component to be damped. Multiple first pistons 21 are connected to the load-bearing connector 3. The side of the load-bearing connector 3 facing away from the first pistons 21 is connected to the component to be damped. After the load-bearing connector 3 is connected to the multiple first pistons 21, the component to be damped can be assembled using the load-bearing connector 3. This facilitates assembly between the shock absorber and the component to be damped and improves assembly efficiency. The load-bearing connector 3 is a flexible member. When the multiple first pistons 21 have different degrees of expansion and contraction, the load-bearing connector 3 can adaptively deform, making it suitable for the multi-point and multi-region vibration damping mode of the shock absorber.

[0097] Specifically, the load-bearing connecting member 3 is a flexible pad made of high-strength rubber material, which has strong elastic deformation ability and can also cushion the impact on the first piston 21.

[0098] In some embodiments of this application, please refer to Figure 1 、 Figure 2 and Figure 5 The shock absorber also includes a base 4, which can be used to connect to the ground or a fixed frame in the equipment. Multiple second pistons 22 are connected to the base 4, which can keep the second pistons 22 in a relatively static state, so that when the pressure in the third chamber 113 changes, the cylinder 1 moves relative to the second piston 22, thereby achieving buffering and consumption of vibration energy.

[0099] In some embodiments of this application, please refer to Figure 1 and Figure 2 The shock absorber also includes an elastic sleeve 5, which is mounted on the outside of the cylinder body 1. One end of the elastic sleeve 5 is connected to the load-bearing connector 3, and the other end of the elastic sleeve 5 is connected to the base 4. This can enclose and protect the cylinder body 1 and piston assembly 2, preventing foreign matter from entering the fitting gap between the cylinder body 1 and the piston assembly 2, thereby extending the service life of the shock absorber. At the same time, the elastic sleeve 5 can also absorb some vibration energy through elastic deformation, which helps to improve the vibration reduction effect of the shock absorber.

[0100] Specifically, the top end of the elastic sleeve 5 is connected to the circumferential edge of the load-bearing connector 3, and the bottom end of the elastic sleeve 5 is connected to the circumferential edge of the base 4, so that the shock absorber can become a retractable closed structure. When the piston assembly 2 moves relative to the cylinder body 1, the elastic sleeve 5 can be retracted and contracted in the vertical direction.

[0101] In some embodiments of the present application, the shape of the elastic sleeve 5 matches the shape of the cylinder 1, which can reduce the distance between the inner wall of the elastic sleeve 5 and the outer wall of the cylinder 1, thereby reducing the spatial size of the shock absorber. The elastic sleeve 5 can be made of a material such as rubber, which has good elastic deformation ability.

[0102] In some embodiments of this application, please refer to Figure 1 and Figure 2 The wall of the elastic sleeve 5 is configured as a corrugated structure, which is beneficial to improving the telescopic deformation ability of the elastic sleeve 5 so that the elastic sleeve 5 can achieve telescopic deformation following the telescopic condition of the piston assembly 2.

[0103] See also Figures 1 to 7The second aspect of the embodiment of the present application provides a vibration reduction system, including the vibration reducer in the above embodiment, and also including an active vibration reduction component 6, the active vibration reduction component 6 includes a driving member 61 and multiple pipes 62, the multiple pipes 62 are correspondingly connected to multiple cavities 11, the driving member 61 realizes the input or output of the fluid medium in the cavity 11 through the pipe 62, realizes the pressure regulation of the fluid medium inside the cavity 11, thereby realizing the adjustment of the stiffness of the vibration reducer.

[0104] Specifically, the driving member 61 can be a compressor or a pump, which is used to realize the flow control of gas or liquid in the pipeline 62. The multiple pipelines 62 are connected to the multiple pressure regulating holes 14 in a one-to-one correspondence, and the fluid medium can be input or extracted into or out of the pressure regulating holes 14 and the second chamber 112 or the third chamber 113 through the pipeline 62. Figure 7 As shown, the P1 adjustment of the first chamber 111 in the multiple cavities 11 is achieved, thereby achieving the stiffness adjustment of the multiple cavities 11 and the shock absorber.

[0105] It should be noted that a stop valve is provided on the pipeline 62. When the stop valves on multiple pipelines 62 are closed, multiple pressure regulating holes 14 are in a closed state. At this time, the shock absorber is in an adaptive vibration reduction mode; when the stop valve on the pipeline 62 is opened, the fluid medium can be input or extracted to the corresponding pressure regulating hole 14, thereby entering the active vibration reduction mode; the multifunctional vibration reduction of the shock absorber can be realized, which is suitable for various operating conditions.

[0106] In some embodiments of this application, please refer to Figure 7 The vibration reduction system also includes a control component 7 and multiple pressure detection components 8. The multiple pressure detection components 8 are correspondingly arranged in multiple cavities 11. The driving component 61, the valve component 13, the stop valve on the pipeline 62 and the multiple pressure detection components are all connected to the control component 7 by signal, so as to realize automatic control of the driving component 61, the valve component 13 and the stop valve according to the internal pressure changes of the cavity 11.

[0107] Specifically, the pressure detection assembly 8 includes a first pressure sensor 81, a second pressure sensor 82 and a third pressure sensor 83, wherein the first pressure sensor 81 is arranged in the first chamber 111 for detecting P1; the second pressure sensor 82 is arranged in the second chamber 112 for detecting P2; and the third sensor is arranged in the third chamber 113 for detecting P3.

[0108] As a specific embodiment of the present application, the driving member 61 is a compressor, which can perform inflation and deflation operations on the second chamber 112 and / or the third chamber 113 through the pipeline 62; when the pressure detection component 8 transmits the pressure information of the first chamber 111, the second chamber 112 and the third chamber 113 to the control component 7, the control component 7 then sends action instructions to the driving member 61, the shut-off valve on the pipeline 62 and the valve component 13 in the channel 12, thereby realizing stiffness adjustment or active vibration reduction.

[0109] It should be noted that the above-mentioned shock absorber and vibration reduction system can be applied to any mechanical equipment that requires vibration reduction, such as transportation equipment, production equipment, household appliances, etc. The size of the shock absorber can be designed according to the mass of the component to be damped it carries.

[0110] A third aspect of the present application provides a refrigeration device, comprising the vibration absorber in the above embodiment, which can perform adaptive vibration reduction.

[0111] Alternatively, the vibration reduction system includes the above embodiment, which is a multi-cavity flexible vibration reduction system, and can realize multifunctional vibration reduction modes such as adaptive vibration reduction, active vibration reduction and stiffness adjustment through the vibration reduction system.

[0112] It should be noted that the above-mentioned refrigeration equipment can be mobile refrigeration equipment, such as a refrigerated truck, etc., or can be fixed refrigeration equipment, such as an air conditioner, etc.

[0113] As a specific embodiment of the present application, the refrigeration equipment is a refrigerated truck, and the shock absorber can be used to provide vibration-damping support for the cargo box of the refrigerated truck (that is, the cargo box is the component to be damped). When the mass of the cargo inside the cargo box is relatively small, an adaptive vibration reduction mode can be adopted; when the mass of the cargo inside the cargo box is relatively small or the operation of the refrigerated truck is relatively bumpy, all valves 13 can be opened to connect multiple first chambers 111 in series to reduce the stiffness of the shock absorber and increase the damping so as to fully dissipate the energy generated by the vibration. When the cargo inside the cargo box is heavy, an active vibration reduction mode can be adopted, and all valves 13 can be closed to increase the stiffness of the shock absorber through the active vibration reduction component 6 to ensure the smooth operation of the vibration reduction system.

[0114] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0115] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0116] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A shock absorber, characterized in that: include: A cylinder body (1), wherein a plurality of cavities (11) are formed in the cylinder body (1); A piston assembly (2), wherein a plurality of the piston assemblies (2) are arranged in a one-to-one correspondence with a plurality of the cavities (11), and the piston assembly (2) comprises a first piston (21), wherein the first piston (21) is slidably arranged in the cavity (11); the plurality of the first pistons (21) are used to connect with a component to be damped; The piston assembly (2) further comprises a second piston (22) slidably disposed in the cavity (11), the first piston (21) and the second piston (22) being disposed opposite to each other, and a first chamber (111) being formed between the first piston (21) and the second piston (22).

2. The shock absorber according to claim 1, characterized in that The axes of the multiple cavities (11) are parallel.

3. The shock absorber according to claim 1, characterized in that The plurality of cavities (11) are evenly distributed in the cylinder (1), and the cross-sectional areas of the plurality of cavities (11) are equal.

4. The shock absorber according to claim 1, characterized in that A plurality of channels (12) are provided in the cylinder body (1), and two adjacent first chambers (111) are connected via the channels (12).

5. The shock absorber according to claim 4, characterized in that A valve member (13) is provided in the channel (12).

6. The shock absorber according to claim 1, characterized in that A second chamber (112) is formed between the first piston (21) and the inner wall of the cavity (11), and a third chamber (113) is formed between the second piston (22) and the inner wall of the cavity (11). The second chamber (112) and the third chamber (113) are respectively located on both sides of the first chamber (111).

7. The shock absorber according to claim 6, characterized in that The cylinder body (1) is provided with a plurality of pressure regulating holes (14), and the pressure regulating holes (14) are in communication with the second chamber (112) or the third chamber (113).

8. The shock absorber according to claim 7, characterized in that A plurality of three-way flow channels (15) are provided in the cylinder body (1), and two adjacent second chambers (112) or two adjacent third chambers (113) are connected to the pressure regulating hole (14) through the three-way flow channels (15).

9. The shock absorber according to claim 7, characterized in that The first piston (21) and the second piston (22) each comprise a connected piston body (211) and a piston rod (212); a piston rod through hole (16) is provided at the end of the cylinder body (1); and a sealing member is provided on the piston rod through hole (16).

10. The shock absorber according to claim 9, characterized in that The plurality of pressure regulating holes (14) and the plurality of piston rod through holes (16) are alternately arranged at intervals at the end of the cylinder body (1).

11. The shock absorber according to claim 1, characterized in that It also includes a bearing connection member (3) for connecting to the component to be damped, a plurality of the first pistons (21) are connected to the bearing connection member (3), and the bearing connection member (3) is a flexible member.

12. The shock absorber according to claim 11, characterized in that It also includes a base (4), and a plurality of second pistons (22) are connected to the base (4).

13. The shock absorber according to claim 12, characterized in that It also includes an elastic sleeve (5), which is sleeved on the outside of the cylinder body (1), one end of the elastic sleeve (5) is connected to the load-bearing connector (3), and the other end of the elastic sleeve (5) is connected to the base (4).

14. The shock absorber according to claim 13, characterized in that The wall of the elastic sleeve (5) is configured as a corrugated structure.

15. A vibration reduction system, characterized in that: The vibration damper comprises the vibration damper according to any one of claims 1 to 14, and further comprises an active vibration damping component (6), wherein the active vibration damping component (6) comprises a driving member (61) and a plurality of pipelines (62), wherein the plurality of pipelines (62) are correspondingly connected to a plurality of the cavities (11), and the driving member (61) realizes the input or output of the fluid medium in the cavities (11) through the pipelines (62).

16. The vibration reduction system according to claim 15, characterized in that It also includes a control component (7) and multiple pressure detection components (8), wherein the multiple pressure detection components (8) are correspondingly arranged in the multiple cavities (11), and the driving member (61) and the multiple pressure detection components (8) are both connected to the control component (7) by signal.

17. A refrigeration device, characterized in that: comprising the shock absorber according to any one of claims 1 to 14; Alternatively, it comprises the vibration reduction system according to claim 15 or 16.

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