Hydraulic shock absorber, hydraulic suspension system and vehicle

Abstract

The invention discloses a hydraulic shock absorber, a hydraulic suspension system and a vehicle. The hydraulic shock absorber comprises a shock absorber body and a pressure sensor, and a rodless cavity and a rod cavity are formed in the shock absorber body; the pressure sensor is installed on the shock absorber body and communicates with the rodless cavity and / or the rod cavity. Namely, the pressure sensor is integrated on the hydraulic shock absorber, and the pressure sensor is communicated with the rodless cavity and / or the rod cavity, so that the pressure value of oil in the rodless cavity and / or the rod cavity can be detected, and the accuracy of oil pressure detection when the hydraulic shock absorber executes actions can be improved; and conditions are created for subsequent accurate control of the hydraulic shock absorber.

Description

Technical Field

[0001] This application relates to the technical field of vehicle shock absorption, and particularly to a hydraulic shock absorber, a hydraulic suspension system and a vehicle. Background Art

[0002] A hydraulic shock absorber is an actuator of a vehicle hydraulic suspension system. Utilizing the fluidity of oil, it achieves the effect of reducing impact by the resistance generated when the oil flows through small holes.

[0003] Currently, in existing vehicle hydraulic suspension systems, a pressure sensor is usually integrated on an electro-hydraulic pump connected to the hydraulic shock absorber, and the pressure sensor is used to detect the pressure value of the oil when the hydraulic shock absorber performs an action. Since there will inevitably be losses when the oil flows between the hydraulic shock absorber and the electro-hydraulic pump, the pressure value data of the oil detected by the pressure sensor will have a certain deviation from the hydraulic shock absorber, which will affect the accuracy of the control of the hydraulic shock absorber when the hydraulic suspension system works. Summary of the Invention

[0004] Based on this, it is necessary to provide a hydraulic shock absorber, a hydraulic suspension system and a vehicle that can improve the accuracy of pressure detection data.

[0005] A hydraulic shock absorber includes:

[0006] A shock absorber body, in which a rodless chamber and a rod chamber are provided.

[0007] A pressure sensor, which is installed on the shock absorber body and communicates with the rodless chamber and / or the rod chamber.

[0008] It can be understood that integrating the pressure sensor on the shock absorber body and using the pressure sensor to directly detect the pressure value of the oil in the rodless chamber and / or the rod chamber of the shock absorber body can improve the accuracy of the oil pressure detection when the hydraulic shock absorber performs an action, and creates conditions for the subsequent precise control of the hydraulic shock absorber.

[0009] In one embodiment, the pressure sensor includes a first pressure sensor, and the first pressure sensor communicates with the rodless chamber;

[0010] And / or, the pressure sensor includes a second pressure sensor, and the second pressure sensor communicates with the rod chamber.

[0011] It can be understood that setting a pressure sensor on the rodless chamber and / or the rod chamber to detect the corresponding oil pressure value can facilitate the detection of the corresponding pressure value of the oil in the rodless chamber and / or the rod chamber of the shock absorber body.

[0012] In one embodiment, the shock absorber body includes a control valve assembly, the control valve assembly communicates with the pressure sensor, and the control valve assembly communicates with the rodless chamber and / or the rod chamber.

[0013] It can be understood that the control valve assembly is used to control the flow rate of the hydraulic fluid flowing in the rodless chamber and / or the rod chamber, so as to meet the usage requirements for controlling the actions of the hydraulic shock absorber.

[0014] In one embodiment, the pressure sensor includes a first pressure sensor, the control valve assembly includes a first control valve, and the first control valve communicates with the first pressure sensor and the rodless chamber respectively;

[0015] And / or, the pressure sensor includes a second pressure sensor, the control valve assembly includes a second control valve, and the second control valve communicates with the second pressure sensor and the rod chamber respectively.

[0016] In one embodiment, the pressure sensor includes a first pressure sensor, the control valve assembly includes a first control valve, the shock absorber body is provided with a first valve chamber, the first valve chamber communicates with the first pressure sensor and the rodless chamber respectively, and the first control valve is arranged in the first valve chamber;

[0017] And / or, the pressure sensor includes a second pressure sensor, the control valve assembly includes a second control valve, the shock absorber body is provided with a second valve chamber, the second valve chamber communicates with the second pressure sensor and the rod chamber respectively, and the second control valve is arranged in the second valve chamber.

[0018] In one embodiment, the pressure sensor includes a first pressure sensor, the control valve assembly includes a first control valve, the shock absorber body is provided with a first valve chamber and a first liquid passage, the first pressure sensor communicates with the first valve chamber, the first liquid passage communicates with the first valve chamber and the rodless chamber respectively, and the first control valve is arranged in the first valve chamber;

[0019] And / or, the pressure sensor includes a second pressure sensor, the control valve assembly includes a second control valve, the shock absorber body is provided with a second valve chamber and a second liquid passage, the second pressure sensor communicates with the second valve chamber, the second liquid passage communicates with the second valve chamber and the rod chamber respectively, and the second control valve is arranged in the second valve chamber.

[0020] In one embodiment, the shock absorber body includes a piston rod, a piston housing and an outer housing;

[0021] The piston rod is movably arranged in the piston housing, and the piston rod divides the inside of the piston housing into a rodless chamber and a rod chamber;

[0022] The outer housing is sleeved outside the piston housing, and an oil passage chamber is formed between the outer housing and the piston housing. The oil passage chamber communicates with the rod chamber and the pressure sensor.

[0023] In one embodiment, a connecting ring is provided at one end of the shock absorber body.

[0024] It can be understood that by using the connecting ring connected to the shock absorber pump body, the hydraulic shock absorber can be assembled and fixed through the connecting ring, which is convenient for the assembly and application of the hydraulic shock absorber in a vehicle.

[0025] This application also provides a hydraulic suspension system, which includes:

[0026] The hydraulic shock absorber as described above.

[0027] This application also provides a vehicle, which includes:

[0028] The hydraulic shock absorber as described above.

[0029] Due to the application of the above technical solutions, this application has the following advantages compared with the prior art:

[0030] For the hydraulic shock absorber, hydraulic suspension system and vehicle claimed in this application, the pressure sensor is integrated on the shock absorber body, and the pressure sensor is used to directly detect the pressure value of the oil in the rodless chamber and / or rod chamber of the shock absorber body, which can improve the accuracy of oil pressure detection when the hydraulic shock absorber performs actions and creates conditions for the subsequent precise control of the hydraulic shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of the hydraulic shock absorber provided by this application.

[0033] Figure 2 It is a schematic structural diagram of the hydraulic shock absorber provided by this application from another perspective.

[0034] Figure 3 For Figure 2 The A-A cross-sectional view in

[0035] Figure 4 This is a schematic diagram of the partial structure of the hydraulic shock absorber provided by this application.

[0036] Figure 5 is Figure 4 exploded view of.

[0037] Reference numerals: 100, hydraulic shock absorber; 10, shock absorber body; 110, rodless cavity; 120, rod cavity; 11, piston rod; 111, piston head; 12, piston housing; 121, through hole; 13, outer housing; 14, control valve assembly; 141, first control valve; 142, second control valve; 15, connecting ring; 101, oil passage; 102, first valve chamber; 103, second valve chamber; 104, first liquid passage; 20, pressure sensor; 21, first pressure sensor; 22, second pressure sensor. Detailed implementation manners

[0038] To make the above objects, features, and advantages of this application more obvious and understandable, the following will describe in detail the specific implementation manners of this application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0039] It should be noted that when a component is referred to as "fixed to" or "provided on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "upper", "lower", and similar expressions used in the description of this application are only for the purpose of illustration and do not represent the only implementation manner.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one feature. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "above" or "below" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium.

[0042] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0043] The hydraulic shock absorber 100 claimed in this application is applied to the hydraulic suspension system of a vehicle and serves as an actuator when the hydraulic suspension system works.

[0044] As Figures 1 to 5 shown, the hydraulic shock absorber 100 provided in this application includes a shock absorber body 10 and a pressure sensor 20. An oil-free cavity 110 and an oil rod cavity 120 are arranged inside the shock absorber body 10; the pressure sensor 20 is installed on the shock absorber body 10, and the pressure sensor 20 communicates with the oil-free cavity 110 and / or the oil rod cavity 120. The pressure sensor 20 is integrated on the shock absorber body 10 of this application, and by communicating between the pressure sensor 20 and the oil-free cavity 110 and / or the oil rod cavity 120, the oil pressure value in the oil-free cavity 110 and / or the oil rod cavity 120 can be detected.

[0045] As can be seen from the above, the hydraulic shock absorber 100 of this application directly uses the pressure sensor 20 to detect the oil pressure value in the oil-free cavity 110 and / or the oil rod cavity 120 inside the shock absorber body 10, which can improve the accuracy of oil pressure detection when the hydraulic shock absorber 100 performs actions.

[0046] As Figure 3 shown, in one embodiment, the shock absorber body 10 includes a piston rod 11, a piston housing 12, and an outer housing 13; the piston rod 11 is movably arranged inside the piston housing 12, and the piston rod 11 divides the inside of the piston housing 12 into an oil-free cavity 110 and an oil rod cavity 120 of the shock absorber body 10. Among them, the piston rod 11 includes a piston head 111, and the piston head 111 divides the inside of the piston housing 12 into an oil-free cavity 110 and an oil rod cavity 120.

[0047] As Figure 3 shown, in this embodiment, the outer housing 13 is sleeved outside the piston housing 12, and an oil passage cavity 101 is formed between the outer housing 13 and the piston housing 12, and the oil passage cavity 101 communicates with the oil rod cavity 120. The oil rod cavity 120 of the shock absorber body 10 can communicate with the pressure sensor 20 through the oil passage cavity 101, that is, the oil passage cavity 101 communicates with the oil rod cavity 120 and the pressure sensor 20. Among them, a through hole 121 is opened on the piston housing 12, and the oil rod cavity 120 can communicate with the oil passage cavity 101 through the through hole 121.

[0048] As Figure 3As shown, in one embodiment, the shock absorber body 10 includes a control valve assembly 14. The control valve assembly 14 is connected to a pressure sensor 20 and is also connected to the rodless chamber 110 and / or the rod chamber 120. When the hydraulic shock absorber 100 performs an action, the control valve assembly 14 can be used to control the flow rate of the hydraulic fluid flowing in the rodless chamber 110 and / or the rod chamber 120, so as to meet the usage requirement of controlling the shock absorption effect when the hydraulic shock absorber 100 performs an action. Among them, the control valve assembly 14 can control the flow rate of the hydraulic fluid flowing in the rodless chamber 110 and the rod chamber 120 respectively.

[0049] As Figures 1 to 5 shown, in one embodiment, the pressure sensor 20 includes a first pressure sensor 21 which is connected to the rodless chamber 110; and / or, the pressure sensor 20 includes a second pressure sensor 22 which is connected to the rod chamber 120. Among them, corresponding first pressure sensors 21 and corresponding second pressure sensors 22 are respectively arranged on the rodless chamber 110 and the rod chamber 120 of the shock absorber body 10, facilitating the detection of the hydraulic fluid pressure in the rodless chamber 110 and the rod chamber 120 on the shock absorber body 10. The hydraulic shock absorber 100 uses the first pressure sensor 21 to detect the pressure value of the hydraulic fluid in the rodless chamber 110 and uses the second pressure sensor 22 to detect the pressure value of the hydraulic fluid in the rod chamber 120. It can be understood that in other embodiments, the hydraulic shock absorber 100 may also have only one pressure sensor 20 to detect the pressure value of the hydraulic fluid in the rodless chamber 110 or the rod chamber 120 in the shock absorber body 10, which will not be elaborated here.

[0050] As Figures 1 to 5 shown, in one embodiment, the first pressure sensor 21 and the second pressure sensor 22 are arranged on the same side of the shock absorber body 10. Specifically, the first pressure sensor 21 and the second pressure sensor 22 can be installed on the side of the shock absorber body 10 away from the outer housing 13. It can be understood that in other embodiments, the first pressure sensor 21 and the second pressure sensor 22 can also be arranged on both sides of the shock absorber body 10.

[0051] As Figure 3As shown, in this embodiment, the control valve assembly 14 includes a first control valve 141 which is respectively connected to the first pressure sensor 21 and the rodless cavity 110; and / or, the control valve assembly 14 includes a second control valve 142 which is respectively connected to the second pressure sensor 22 and the rod cavity 120. The hydraulic shock absorber 100 can control the flow rate of the hydraulic fluid flowing in the rodless cavity 110 with the first control valve 141, and / or control the flow rate of the hydraulic fluid flowing in the rod cavity 120 with the second control valve 142 to meet the use requirements of shock absorption when the hydraulic shock absorber 100 performs actions. Among them, the rodless cavity 110 in the shock absorber body 10 is connected to the first control valve 141, and the rod cavity 120 is connected to the second control valve 142. It can be understood that in other embodiments, the hydraulic shock absorber 100 may also have only one first control valve 141 to control the flow rate of the hydraulic fluid flowing in the rodless cavity 110; or, only one second control valve 142 to control the flow rate of the hydraulic fluid flowing in the rod cavity 120.

[0052] As Figure 3 shown, in this embodiment, the shock absorber body 10 is provided with a first valve cavity 102 which is respectively connected to the first pressure sensor 21 and the rodless cavity 110, and the first control valve 141 is arranged in the first valve cavity 102; and / or, the shock absorber body 10 is provided with a second valve cavity 103 which is respectively connected to the second pressure sensor 22 and the rod cavity 120, and the second control valve 142 is arranged in the second valve cavity 103. That is to say, the hydraulic shock absorber 100 uses the first valve cavity 102 and / or the second valve cavity 103 to accommodate the corresponding first control valve 141 or the second control valve 142, so as to meet the use requirements for the assembly of the first control valve 141 and the second control valve 142 in the shock absorber body 10. Among them, the shock absorber body 10 uses the first valve cavity 102 to accommodate the first control valve 141 and the second valve cavity 103 to accommodate the second control valve 142.

[0053] As Figure 3 shown, in this embodiment, the shock absorber body 10 is further provided with a first liquid passage 104 which is respectively connected to the first valve cavity 102 and the rodless cavity 110. The rodless cavity 110 in the shock absorber body 10 can be connected to the first valve cavity 102 through the first liquid passage 104. That is to say, the first liquid passage 104 plays a role in conducting between the rodless cavity 110 and the first valve cavity 102, so that it is convenient to set the first valve cavity 102 for accommodating the first control valve 141 on the shock absorber body 10. It can be understood that in other embodiments, the first valve cavity 102 may also be directly connected to the rodless cavity 110, and no further elaboration will be made here.

[0054] In this embodiment, the shock absorber body 10 is further provided with a second liquid passage (not shown in the figure), and the second liquid passage communicates with the second valve chamber 103 and the rod chamber 120 respectively. The rod chamber 120 of the shock absorber body 10 can communicate with the second valve chamber 103 through the second liquid passage. That is to say, the second liquid passage plays a role of transfer for the communication between the rod chamber 120 and the second valve chamber 103, so that it is convenient to provide the second valve chamber 103 for accommodating the second control valve 142 on the shock absorber body 10. It can be understood that in other embodiments, the second valve chamber 103 can also be directly communicated with the rod chamber 120, which will not be elaborated here.

[0055] As Figures 1 to 5 shown, in one embodiment, a connecting ring 15 is provided at one end of the shock absorber body 10, so that the hydraulic shock absorber 100 can be assembled and fixed to an external structure through the connecting ring 15, which is convenient for the assembly and application of the hydraulic shock absorber 100 in a vehicle.

[0056] This application also provides a hydraulic suspension system, including the above-mentioned hydraulic shock absorber 100.

[0057] This application also provides a vehicle, including the above-mentioned hydraulic shock absorber 100.

[0058] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0059] The above-mentioned embodiments only represent several implementation manners of this application, and their descriptions are relatively specific and detailed, but they should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the patent protection scope of this application should be subject to the appended claims.

Claims

1. A hydraulic shock absorber, characterized in that: The hydraulic shock absorber (100) comprises: A shock absorber body (10), wherein a rodless cavity (110) and a rod cavity (120) are arranged inside the shock absorber body (10); A pressure sensor (20) is installed on the shock absorber body (10), and the pressure sensor (20) is connected to the rodless chamber (110) and / or the rod chamber (120).

2. The hydraulic shock absorber according to claim 1, characterized in that: The pressure sensor (20) comprises a first pressure sensor (21), wherein the first pressure sensor (21) is in communication with the rodless chamber (110); And / or, the pressure sensor (20) includes a second pressure sensor (22), and the second pressure sensor (22) is connected to the rod chamber (120).

3. The hydraulic shock absorber according to claim 1, characterized in that: The shock absorber body (10) comprises a control valve assembly (14), the control valve assembly (14) is connected to the pressure sensor (20), and the control valve assembly (14) is connected to the rodless chamber (110) and / or the rod chamber (120).

4. The hydraulic shock absorber according to claim 3, characterized in that: The pressure sensor (20) includes a first pressure sensor (21), and the control valve assembly (14) includes a first control valve (141), wherein the first control valve (141) is connected to the first pressure sensor (21) and the rodless chamber (110) respectively; And / or, the pressure sensor (20) includes a second pressure sensor (22), the control valve assembly (14) includes a second control valve (142), and the second control valve (142) is respectively connected to the second pressure sensor (22) and the rod chamber (120).

5. The hydraulic shock absorber according to claim 3, characterized in that: The pressure sensor (20) includes a first pressure sensor (21), the control valve assembly (14) includes a first control valve (141), the shock absorber body (10) is provided with a first valve cavity (102), the first valve cavity (102) is respectively connected to the first pressure sensor (21) and the rodless cavity (110), and the first control valve (141) is arranged in the first valve cavity (102); And / or, the pressure sensor (20) includes a second pressure sensor (22), the control valve assembly (14) includes a second control valve (142), the shock absorber body (10) is provided with a second valve chamber (103), the second valve chamber (103) is respectively connected to the second pressure sensor (22) and the rod chamber (120), and the second control valve (142) is arranged in the second valve chamber (103).

6. The hydraulic shock absorber according to claim 3, characterized in that: The pressure sensor (20) includes a first pressure sensor (21), the control valve assembly (14) includes a first control valve (141), the shock absorber body (10) is provided with a first valve cavity (102) and a first liquid passage (104), the first pressure sensor (21) is connected to the first valve cavity (102), the first liquid passage (104) is respectively connected to the first valve cavity (102) and the rodless cavity (110), and the first control valve (141) is arranged in the first valve cavity (102); And / or, the pressure sensor (20) includes a second pressure sensor (22), the control valve assembly (14) includes a second control valve (142), the shock absorber body (10) is provided with a second valve chamber (103) and a second liquid passage, the second pressure sensor (22) is connected to the second valve chamber (103), the second liquid passage is respectively connected to the second valve chamber (103) and the rod chamber (120), and the second control valve (142) is arranged in the second valve chamber (103).

7. The hydraulic shock absorber according to any one of claims 1 to 6, characterized in that: The shock absorber body (10) comprises a piston rod (11), a piston housing (12) and an outer housing (13); The piston rod (11) is movably disposed in the piston housing (12), and the piston rod (11) divides the piston housing (12) into the rodless chamber (110) and the rod chamber (120); The outer shell (13) is sleeved outside the piston shell (12), and an oil passage chamber (101) is formed between the outer shell (13) and the piston shell (12), and the oil passage chamber (101) is connected to the rod chamber (120) and the pressure sensor (20).

8. The hydraulic shock absorber according to any one of claims 1 to 6, characterized in that: One end of the shock absorber body (10) is provided with a connecting ring (15).

9. A hydraulic suspension system, characterized in that: The hydraulic suspension system includes: The hydraulic shock absorber (100) as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: Vehicle includes: The hydraulic shock absorber (100) as claimed in any one of claims 1 to 8.

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