Stabilizer bar assembly and vehicle

Abstract

The invention relates to a stabilizer bar assembly and a vehicle, and the stabilizer bar assembly comprises a bar system which comprises a first stabilizer bar and a second stabilizer bar; the execution device is provided with a plurality of variable cavities; the hydraulic device communicates with the multiple variable cavities so as to adjust the flow direction and / or flow of the pressure media in the variable cavities; the executing device is connected to the first stabilizer bar and the second stabilizer bar, so that the executing device is driven by the hydraulic device to adjust damping of relative rotation between the first stabilizer bar and the second stabilizer bar. The stabilizer bar assembly has the beneficial effect that the stabilizer bar assembly has different torsion resistance capacities by adjusting the flow direction or flow of the pressure medium in the hydraulic device.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a stabilizer bar assembly and a vehicle. Background Art

[0002] The function of the stabilizer bar is to prevent the car body from excessive lateral tilt when turning and to keep the car body balanced as much as possible.

[0003] In the related technology, passive stabilizer bars are used, and the torsional resistance brought by the stiffness of the passive stabilizer bars themselves can be used to achieve their functions. However, passive stabilizer bars cannot effectively cope with various working conditions and cannot take into account both handling stability and comfort due to their single and non-adjustable stiffness, and are gradually being replaced by active stabilizer bars.

[0004] However, existing technical solutions for active stabilizer bars often have problems of complex structure or poor reliability. Summary of the invention

[0005] The embodiments of the present application provide a stabilizer bar assembly and a vehicle to at least partially solve the above-mentioned technical problems.

[0006] In order to achieve the above object, according to a first aspect of the present application, a stabilizer bar assembly is provided, the stabilizer bar assembly comprising:

[0007] A rod system, including a first stabilizer rod and a second stabilizer rod;

[0008] An execution device, provided with a plurality of variable chambers;

[0009] A hydraulic device, respectively connected to the plurality of variable chambers to adjust the flow direction and / or flow rate of the pressure medium in the variable chambers;

[0010] The actuator is connected to the first stabilizer bar and the second stabilizer bar respectively, so that the actuator adjusts the damping of the relative rotation between the first stabilizer bar and the second stabilizer bar under the drive of the hydraulic device.

[0011] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0012] The first switch valve is used to disconnect or connect the first medium flow path between the two variable chambers, and the first switch valve has a first aperture.

[0013] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0014] The second switch valve is used to disconnect or connect the second medium flow path between the two variable chambers. The second switch valve has a second aperture, which is different from the first aperture.

[0015] Optionally, in some embodiments of the present application, when the first switch valve is turned on alone, the damping of the relative rotation between the first stabilizing bar and the second stabilizing bar is the first damping;

[0016] When the second switch valve is turned on alone, the damping of the relative rotation between the first stabilizing bar and the second stabilizing bar is the second damping;

[0017] When the first switch valve and the second switch valve are both turned on, the damping of the relative rotation between the first stabilizing bar and the second stabilizing bar is a third damping, and the third damping is smaller than the first damping and the second damping.

[0018] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0019] a first outflow oil passage, used for connecting the first switch valve and the variable chamber;

[0020] The first one-way valve is disposed in the first oil outflow passage, and is used to allow the pressure medium in the first oil outflow passage to flow to the first switch valve in a one-way manner.

[0021] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0022] a first return oil circuit, used for connecting the first switch valve and the variable chamber;

[0023] The second one-way valve is arranged in the first return oil circuit, and is used to make the pressure medium in the first return oil circuit flow to the variable chamber in one direction.

[0024] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0025] a second outflow oil passage, used for connecting the second switch valve and the variable chamber;

[0026] The third one-way valve is arranged in the second oil outlet passage, and is used for allowing the pressure medium in the first oil outlet passage to flow to the second switch valve in one direction.

[0027] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0028] a second return oil circuit, used for connecting the second switch valve and the variable chamber;

[0029] A fourth one-way valve is provided in the second return oil circuit, and is used to allow the pressure medium in the second return oil circuit to flow to the variable chamber in one direction.

[0030] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0031] The oil return circuit is used to connect at least one of the variable chambers to the oil storage space.

[0032] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0033] a first return oil circuit, used for connecting the first switch valve and the variable chamber;

[0034] a second one-way valve, disposed in the first return oil circuit, for allowing the pressure medium in the first return oil circuit to flow to the variable chamber in one direction;

[0035] Wherein, when the first switch valve and the second switch valve are both disconnected, the pressure medium between the variable chambers of the hydraulic device flows through the return oil passage and the first return oil passage.

[0036] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0037] a second return oil circuit, used for connecting the second switch valve and the variable chamber;

[0038] a fourth one-way valve, disposed in the second return oil circuit, for allowing the pressure medium in the second return oil circuit to flow to the variable chamber in one direction;

[0039] Wherein, when the first switch valve and the second switch valve are both disconnected, the pressure medium between the variable chambers of the hydraulic device flows through the central return oil passage and the second return oil passage.

[0040] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0041] a first return oil circuit, used for connecting the first switch valve and the variable chamber;

[0042] a second one-way valve, disposed in the first return oil circuit, for allowing the pressure medium in the first return oil circuit to flow to the variable chamber in one direction;

[0043] a second return oil circuit, used for connecting the second switch valve and the variable chamber;

[0044] a fourth one-way valve, disposed in the second return oil circuit, for allowing the pressure medium in the second return oil circuit to flow to the variable chamber in one direction;

[0045] Wherein, the central return oil circuit, the first return oil circuit, and the second return oil circuit are all connected to the oil storage space.

[0046] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0047] The accumulator is used to form the oil storage space.

[0048] Optionally, in some embodiments of the present application, the hydraulic device further comprises:

[0049] a first outflow oil passage, used for connecting the first switch valve and the variable chamber;

[0050] a first one-way valve, disposed in the first oil outflow passage, and configured to allow the pressure medium in the first oil outflow passage to flow to the first switch valve in one direction;

[0051] a second outflow oil passage, used for connecting the second switch valve and the variable chamber;

[0052] The third one-way valve is arranged in the second oil outlet passage, and is used for allowing the pressure medium in the first oil outlet passage to flow to the second switch valve in one direction.

[0053] Optionally, in some embodiments of the present application, both the first oil outlet passage and the second oil outlet passage are connected to the first switch valve.

[0054] Optionally, in some embodiments of the present application, both the first oil outlet passage and the second oil outlet passage are connected to the second switching valve.

[0055] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0056] A main control switch, used for disconnecting or connecting the first medium flow path between the two variable chambers;

[0057] A proportional valve is used to control the flow rate of the pressure medium in the second medium flow path between the two variable chambers.

[0058] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0059] A first output oil circuit, used for connecting the proportional valve and the variable chamber;

[0060] A fifth one-way valve is provided in the first output oil circuit, and is used to allow the pressure medium in the first output oil circuit to flow to the proportional valve in one direction.

[0061] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0062] A first return oil circuit, used for connecting the proportional valve and the variable chamber;

[0063] A sixth one-way valve is provided in the first return oil circuit, and is used to allow the pressure medium in the first return oil circuit to flow unidirectionally to the variable chamber.

[0064] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0065] a second output oil circuit, used for connecting the proportional valve and the variable chamber;

[0066] A seventh one-way valve is provided in the second output oil circuit, and is used to allow the pressure medium in the second output oil circuit to flow to the proportional valve in one direction.

[0067] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0068] A second oil return circuit, used for connecting the proportional valve and the variable chamber;

[0069] An eighth one-way valve is provided in the second return oil circuit, and is used to allow the pressure medium in the second return oil circuit to flow unidirectionally to the variable chamber.

[0070] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0071] The return oil circuit is used to connect at least one of the variable chambers to the proportional valve.

[0072] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0073] A first return oil circuit, used for connecting the proportional valve and the variable chamber;

[0074] a sixth one-way valve, disposed in the first return oil circuit, and used to allow the pressure medium in the first return oil circuit to flow to the variable chamber in one direction;

[0075] A second oil return circuit, used for connecting the proportional valve and the variable chamber;

[0076] an eighth one-way valve, disposed in the second return oil circuit, for allowing the pressure medium in the second return oil circuit to flow to the variable chamber in one direction;

[0077] Wherein, the return oil circuit, the first return oil circuit, and the second return oil circuit are all connected to the proportional valve.

[0078] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0079] A first output oil circuit, used for connecting the proportional valve and the variable chamber;

[0080] a fifth one-way valve, disposed in the first output oil circuit, and configured to allow the pressure medium in the first output oil circuit to flow to the proportional valve in one direction;

[0081] a second output oil circuit, used for connecting the proportional valve and the variable chamber;

[0082] a seventh one-way valve, provided in the second output oil circuit, for allowing the pressure medium in the second output oil circuit to flow to the proportional valve in one direction;

[0083] Wherein, the first output oil circuit and the second output oil circuit are both connected to the proportional valve.

[0084] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0085] A first switch flow path, used to connect the main control switch and one of the two variable chambers;

[0086] The second switch flow path is used to connect the main control switch and the other of the two variable chambers.

[0087] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0088] A first output oil circuit, used for connecting the proportional valve and the variable chamber;

[0089] a fifth one-way valve, disposed in the first output oil circuit, and configured to allow the pressure medium in the first output oil circuit to flow to the proportional valve in one direction;

[0090] A first return oil circuit, used for connecting the proportional valve and the variable chamber;

[0091] a sixth one-way valve, disposed in the first return oil circuit, and used to allow the pressure medium in the first return oil circuit to flow to the variable chamber in one direction;

[0092] a second output oil circuit, used for connecting the proportional valve and the variable chamber;

[0093] a seventh one-way valve, provided in the second output oil circuit, for allowing the pressure medium in the second output oil circuit to flow to the proportional valve in one direction;

[0094] A second oil return circuit, used for connecting the proportional valve and the variable chamber;

[0095] an eighth one-way valve, disposed in the second oil return passage, for allowing the pressure medium in the second oil return passage to flow to the variable chamber in one direction;

[0096] a return oil circuit, used to connect at least one of the variable chambers to the proportional valve;

[0097] The first switch flow path is connected to the first output oil path and the first return oil path respectively; the second switch flow path is connected to the second output oil path and the second return oil path respectively.

[0098] Optionally, in some embodiments of the present application, the first output oil circuit and the second output oil circuit are both connected to the inlet end of the proportional valve; the first return oil circuit, the second return oil circuit and the return oil circuit are all connected to the outlet end of the proportional valve.

[0099] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0100] An accumulator, used to form an oil storage space;

[0101] Wherein, the accumulator is connected to the inflow end of the proportional valve.

[0102] Optionally, in some embodiments of the present application, the hydraulic device includes:

[0103] A sensor is used to detect the pressure and / or temperature of the pressure medium in the hydraulic device.

[0104] Optionally, in some embodiments of the present application, the execution device includes:

[0105] An execution cylinder body is formed with a cylinder inner cavity;

[0106] An actuating piston is movably disposed inside the actuating cylinder and divides the inner cavity of the cylinder into a plurality of variable chambers;

[0107] Wherein, the actuator cylinder body is provided with a first cylinder port, a second cylinder port and a third cylinder port; the third cylinder port is arranged between the first cylinder port and the second cylinder port, so that the actuator piston can close the third cylinder port through the piston sealing assembly under the action of the pressure medium of the first cylinder port and / or the second cylinder port.

[0108] Optionally, in some embodiments of the present application, the actuator piston and the actuator cylinder form a ball screw mechanism.

[0109] Optionally, in some embodiments of the present application, the actuator cylinder includes:

[0110] An intermediate housing, forming the inner cavity of the cylinder body and the third cylinder port;

[0111] a first end cover, forming the first cylinder port;

[0112] a second end cover, forming the second cylinder port;

[0113] Wherein, the intermediate shell is arranged between the first end cover and the second end cover.

[0114] According to a second aspect of the present application, a vehicle is provided, comprising the stabilizer bar assembly described in any one of the above embodiments.

[0115] The benefit of the present application lies in that the stabilizer bar assembly has different torsional resistance capabilities by adjusting the flow direction or flow rate of the pressure medium inside the hydraulic device.

[0116] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0117] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0118] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0119] Figure 1 is a schematic diagram of the overall structure of a stabilizer bar assembly provided in an exemplary embodiment of the present application;

[0120] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the actuator in the stabilizer bar assembly shown;

[0121] Figure 3 yes Figure 1 A schematic structural diagram of a hydraulic device in a stabilizer bar assembly as viewed from a first perspective;

[0122] Figure 4 yes Figure 1 A schematic structural diagram of a hydraulic device in a stabilizer bar assembly shown in FIG. 1 as viewed from a second viewing angle;

[0123] Figure 5 is a schematic diagram of a first hydraulic device in a connection mode provided in an exemplary embodiment of the present application;

[0124] Figure 6 yes Figure 5 A schematic diagram of a first flow path of the hydraulic device in a connection mode is shown;

[0125] Figure 7 yes Figure 5 A schematic diagram of a second flow path of the hydraulic device in a connected mode is shown;

[0126] Figure 8 yes Figure 5 A schematic diagram of a first flow path of the hydraulic device in a disconnect mode is shown;

[0127] Fig. 9 yes Figure 5 A schematic diagram of a second flow path of the hydraulic device in disconnect mode is shown;

[0128] Fig.10 yes Figure 5 A schematic diagram of a third flow path of the hydraulic device shown in a semi-coupled mode;

[0129] Fig.11 yes Figure 5 A schematic diagram of a fourth flow path of the hydraulic device in a semi-coupled mode is shown;

[0130] Fig.12 is a schematic diagram of a second hydraulic device provided in an exemplary embodiment of the present application in a connection mode;

[0131] Fig.13 is a schematic diagram of a vehicle in an exemplary embodiment of the present application.

[0132] Description of reference numerals:

[0133] 1. Vehicle; 10. Stabilizer bar assembly; 100. Rod system; 110. First stabilizer bar; 120. Second stabilizer bar; 200. Hydraulic device; 300. Actuator; 310. Actuator cylinder; 310a. Cylinder inner cavity; 310b. First variable chamber; 310c. Second variable chamber; 310e. First cylinder port; 310f. Second cylinder port; 310g. Third cylinder port; 311. First end cover; 311a. End cover keyway; 312. Second end cover; 313. 2a, cylinder through hole; 313, intermediate housing; 313a, ball nut groove; 314, cylinder seal assembly; 320, actuator piston; 320a, ball screw groove; 321, piston part; 322, connecting rod part; 330, actuator spindle; 340, connecting sleeve; 340a, sleeve keyway; 351, first reverser; 352, second reverser; 360, piston seal assembly; 370, spindle seal assembly; 380, first bearing; 390, second bearing;

[0134] 400, hydraulic device; 411, first one-way valve; 412, second one-way valve; 413, third one-way valve; 414, fourth one-way valve; 421, first switch valve; 422, second switch valve; 430, first accumulator; 441, first pressure sensor; 442, second pressure sensor; 451, first oil pipe; 452, second oil pipe; 453, third oil pipe; 460, hydraulic valve block;

[0135] 401, first outflow oil circuit; 402, second outflow oil circuit; 403, first return oil circuit; 404, second return oil circuit; 405, return oil circuit;

[0136] 500, hydraulic device; 501, first output oil circuit; 502, second output oil circuit; 503, first return oil circuit; 504, second return oil circuit; 505, return oil circuit; 511, fifth one-way valve; 512, sixth one-way valve; 513, seventh one-way valve; 514, eighth one-way valve; 515, first switch flow path; 516, second switch flow path; 523, main control switch valve; 530, second accumulator; 570, proportional valve. DETAILED DESCRIPTION

[0137] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0138] Reference Figures 1 to 4 As shown, as a first aspect of the present application, the present application provides a stabilizer bar assembly 10. The stabilizer bar assembly 10 comprises: a rod system 100, an actuator 300 and a hydraulic device 400.

[0139] Specifically, the rod system 100 includes a first stabilizer rod 110 and a second stabilizer rod 120; the actuator 300 is provided with a plurality of variable chambers; and the hydraulic device 400 is respectively connected to the plurality of variable chambers to adjust the flow direction and / or flow rate of the pressure medium in the variable chambers.

[0140] The actuator 300 is connected to the first stabilizer bar 110 and the second stabilizer bar 120 respectively, so that the actuator 300 adjusts the damping of the relative rotation between the first stabilizer bar 110 and the second stabilizer bar 120 under the driving of the hydraulic device 400 .

[0141] The above scheme can change the flow direction and flow rate of the pressure medium in the variable chamber of the actuator 300, so that the first stabilizer bar 110 and the second stabilizer bar 120 have multiple relative rotation states, and finally the stabilizer bar assembly 10 has multiple torsion resistance to adapt to various road conditions or driving conditions.

[0142] Reference Figure 1 to Figure 2 As shown, the actuator 300 of the present application includes: an actuator cylinder 310 , an actuator piston 320 and an actuator spindle 330 .

[0143] The actuator cylinder 310 forms a cylinder inner cavity 310a; the actuator piston 320 is movably disposed inside the actuator cylinder 310 and divides the cylinder inner cavity 310a into a plurality of variable chambers.

[0144] Specifically, the actuator piston 320 includes a piston portion 321 and a connecting rod portion 322. Among them, the piston portion 321 is used to separate the inner cavity 310a of the cylinder body into two variable chambers, and the two variable chambers are defined as the first variable chamber 310b and the second variable chamber 310c respectively. When the piston portion 321 moves, the volume of the first variable chamber 310b and the second variable chamber 310c will change. The connecting rod portion 322 is mainly used to form a ball screw groove 320a. The actuator piston 320 can be regarded as a combination of a piston and a ball screw, that is, the actuator piston 320 has the functions of a piston and a ball screw at the same time, and these two parts of the function are realized by the piston portion 321 and the connecting rod portion 322 of the actuator piston 320.

[0145] Specifically, the movement of the actuator piston 320 in the actuator cylinder 310 is a composite movement, that is, the actuator piston 320 is simultaneously connected to the actuator cylinder 310 in a sliding connection and a rotation connection. The direction in which the actuator piston 320 slides relative to the actuator cylinder 310 is parallel to the axis in which the actuator piston 320 and the actuator cylinder 310 rotate relative to each other.

[0146] Specifically, since the actuator piston 320 slides and rotates in the actuator cylinder 310, in order to ensure the sealing of both sides of the piston portion 321 of the actuator piston 320, a piston sealing assembly 360 is provided on the outer side of the piston portion 321, and the sealing effect is ensured by the flexible contact between the piston sealing assembly 360 and the inner wall of the actuator cylinder 310. As a more specific solution, the piston sealing assembly 360 may include a sealing ring, a Gley ring, etc.; the piston portion 321 is formed with a corresponding sealing groove (not shown in the figure) to accommodate the piston sealing assembly 360.

[0147] The inner wall of the actuator cylinder 310 is formed with a ball nut groove 313a, which can cooperate with the ball screw groove 320a formed by the actuator piston 320 to accommodate a plurality of balls, so that the actuator piston 320 and the actuator cylinder 310 form a ball screw mechanism. The balls are equivalent to being arranged between the actuator piston 320 and the actuator cylinder 310 to realize the ball screw pair transmission, that is, the sliding and rotation of the actuator piston 320 relative to the actuator cylinder 310 are linked in motion, and when the actuator piston 320 and the actuator cylinder 310 slide relative to each other, relative rotation also occurs simultaneously, or, when the actuator piston 320 and the actuator cylinder 310 rotate relative to each other, relative sliding also occurs simultaneously.

[0148] Reference Figure 2As shown, in some embodiments of the present application, a reverser is further provided inside the actuator cylinder 310 to guide the movement of the ball. As a specific solution, a first reverser 351 and a second reverser 352 are provided inside the actuator cylinder 310, which respectively guide the movement of the ball when the actuator piston 320 moves to the limit position.

[0149] Reference Figure 2 As shown, in some embodiments of the present application, the execution spindle 330 is at least partially disposed inside the execution cylinder 310, and the other part thereof passes through the cylinder through hole 312a provided in the execution cylinder 310 and is disposed outside the execution cylinder 310. The execution spindle 330 and the execution cylinder 310 are only connected in rotation, that is, the execution spindle 330 can only rotate relative to the execution cylinder 310.

[0150] The actuating piston 320 and the actuating spindle 330 form a non-rotating connection and a sliding connection, that is, the actuating piston 320 and the actuating spindle 330 can slide relative to each other, but cannot rotate relative to each other, but rotate synchronously.

[0151] As a specific solution, a spline (not marked in the figure) is provided on the executing spindle 330, and a mounting shaft hole (not marked in the figure) is formed on the executing piston 320. A keyway (not marked in the figure) adapted to the spline is formed on the inner wall of the mounting shaft hole. The cooperation of the spline and the keyway realizes a non-rotating connection between the executing spindle 330 and the executing piston 320.

[0152] Reference Figure 2 As shown, in order to prevent the pressure medium from leaking along the executing main shaft 330, as a specific solution, a main shaft sealing assembly 370 is provided on the executing main shaft 330 to prevent the pressure medium from leaking along the main shaft.

[0153] Reference Figure 2 As shown, in order to realize the rotational connection between the execution spindle 330 and the execution housing, a first bearing 380 and a second bearing 390 are also sleeved on the execution spindle 330; the first bearing 380 and the second bearing 390 are arranged inside the execution housing and supported between the execution spindle 330 and the inner wall of the execution housing.

[0154] Reference Figure 2 As shown, in order to connect the execution spindle 330 with the second stabilizer bar 120, as a specific solution, a connecting sleeve 340 is sleeved on the exposed end of the execution spindle 330, and the connecting sleeve 340 forms a non-rotating connection with the execution spindle 330 and is provided with a sleeve keyway 340a; the end of the second stabilizer bar 120 is provided with a spline structure that can cooperate with the sleeve keyway 340a, so that the second stabilizer bar 120 indirectly forms a non-rotating connection with the execution spindle 330 through the connecting sleeve 340. That is, the execution spindle 330 and the second stabilizer bar 120 can rotate synchronously.

[0155] The purpose of using the actuator spindle 330 is that the purpose of the stabilizer bar assembly 10 is to adjust the relative rotation of the first stabilizer bar 110 and the second stabilizer bar 120. If the second stabilizer bar 120 is directly connected to the actuator piston 320, it will also produce relative sliding, which is not the preset movement of the stabilizer bar assembly 10.

[0156] Reference Figure 1 to Figure 2 As shown, in some embodiments of the present application, the execution housing can be composed of a split structure. Specifically, the execution housing includes: a first end cover 311, a second end cover 312 and an intermediate housing 313. The first end cover 311 forms a first cylinder port 310e; the second end cover 312 forms a second cylinder port 310f; the intermediate housing 313 forms a cylinder inner cavity 310a and a third cylinder port 310g; and the intermediate housing 313 is disposed between the first end cover 311 and the second end cover 312.

[0157] The third cylinder port 310g is disposed between the first cylinder port 310e and the second cylinder port 310f, so that the actuator piston 320 closes the third cylinder port 310g through the piston sealing assembly 360 under the action of the pressure medium of the first cylinder port 310e and / or the second cylinder port 310f.

[0158] As a more specific solution, the first end cover 311, the second end cover 312 and the intermediate housing 313 are fixedly connected. In order to maintain a seal between them, a cylinder seal assembly 314, such as a seal ring, is provided between the first end cover 311 and the intermediate housing 313 and between the second end cover 312 and the intermediate housing 313. As a specific solution, the intermediate housing 313 forms a ball nut groove 313a; and in the sliding direction of the actuator piston 320, the third cylinder port 310g and the ball nut groove 313a are staggered, so that the pressure medium can flow into or out of the third cylinder port 310g more smoothly, thereby avoiding jamming when returning to the center.

[0159] In addition, the first end cover 311 is formed with an end cover keyway 311a, and the first stabilizing rod 110 can cooperate with the end cover keyway 311a through its spline so that the first stabilizing rod 110 and the first end cover 311 form a non-rotating connection, that is, the first stabilizing rod 110 and the actuator cylinder body 310 form a non-rotating connection.

[0160] Reference Figure 1 and Figure 2 As shown, based on the above description, the first stabilizing rod 110 of the present application forms a non-rotating connection with the actuator cylinder 310, the second stabilizing rod 120 forms a non-rotating connection with the actuator piston 320, and the actuator piston 320 and the actuator cylinder 310 form an interrelated rotational connection and sliding connection.

[0161] When the actuator piston 320 is not constrained by the pressure medium and can slide freely, the first stabilizer bar 110 and the second stabilizer bar 120 can rotate freely relative to each other. At this time, the first stabilizer bar 110 and the second stabilizer bar 120 are equivalent to two independent and unrelated components. The mode in which the first stabilizer bar 110 and the second stabilizer bar 120 can rotate freely relative to each other is defined as a disconnection mode, that is, in the disconnection mode, the first stabilizer bar 110 and the second stabilizer bar 120 are equivalent to independently rotating components.

[0162] When the actuator piston 320 slides under the action of the pressure medium on both sides thereof, the first stabilizing rod 110 and the second stabilizing rod 120 can rotate relative to each other. This relative rotation requires overcoming the damping that needs to be overcome when the actuator piston 320 moves. The mode in which the first stabilizing rod 110 and the second stabilizing rod 120 can rotate relative to each other is defined as a semi-coupling mode.

[0163] When the actuator piston 320 cannot slide under the action of the pressure medium on both sides thereof, the first stabilizer bar 110 and the second stabilizer bar 120 form a non-rotational connection, that is, relative rotation is not possible. The mode in which the first stabilizer bar 110 and the second stabilizer bar 120 cannot rotate relative to each other is defined as a connection mode, that is, in the connection mode, the first stabilizer bar 110 and the second stabilizer bar 120 are equivalent to being connected as an integral connecting rod that cannot rotate relative to each other.

[0164] It should be noted that in the connection mode, the first stabilizer bar 110 and the second stabilizer bar 120 are equivalent to being in a balanced state, that is, the pressure on both sides of the actuator piston 320 is in a balanced state. Once this balanced state is broken, it will enter the semi-coupling mode or disconnection mode.

[0165] However, the higher the pressure of the pressure medium that balances the actuator piston 320, the higher the torque required to break this balance. At this time, the torsional resistance of the whole formed by the first stabilizer bar 110 and the second stabilizer bar 120 in the control connection mode can be controlled by controlling the pressure of the pressure medium inside the actuator cylinder 310, that is, the "rigidity" of the whole formed by the first stabilizer bar 110 and the second stabilizer bar 120 in the control connection mode; compared with the fixed torsional resistance (rigidity) directly relying on the material properties of the stabilizer bar in the related art, this provides the stabilizer bar assembly 10 with a variety of torsional strength options to adapt to different driving conditions.

[0166] In summary, the stabilizer bar assembly 10 of the present application can control the pressure on both sides of the actuator piston 320 so that the stabilizer bar assembly 10 has a variety of torsional resistance properties.

[0167] Reference Figures 1 to 5As shown, as a specific solution, the execution device 300 and the hydraulic device 400 are equivalent to the main parts of the hydraulic device 200 of the present application. The specific structure of the hydraulic device 400 of the present application is exemplarily described below in conjunction with the accompanying drawings.

[0168] Reference Figures 1 to 4 As shown, in some embodiments of the present application, the hydraulic device 400 includes: a one-way valve. The one-way valve is used to control the flow direction of the pressure medium between the hydraulic device 400 and the variable chamber.

[0169] The hydraulic device 400 may include a plurality of one-way valves. These one-way valves are used to control the flow direction of the pressure medium in different oil circuits in the hydraulic device 200. The hydraulic device 200 of the present application can make the pressure medium flow along a preset flow path through these one-way valves.

[0170] It should be noted that the "oil circuit" referred to in the present application refers to the passage constructed in the hydraulic device 200 for the pressure medium to flow through. For the sake of convenience, these passages are called "oil circuits". It should not be considered that the "oil circuit" in the present application can only allow "hydraulic oil" to pass through.

[0171] Reference Figures 3 to 5 As shown, as a specific solution, the hydraulic device 400 includes: a first one-way valve 411 , a second one-way valve 412 , a third one-way valve 413 , and a fourth one-way valve 414 .

[0172] The first cylinder port 310e of the actuator cylinder body 310 is respectively connected to the first one-way valve 411 and the second one-way valve 412. The first one-way valve 411 is used to allow the pressure medium of the oil circuit in which it is located to flow out of the first cylinder port 310e; the second one-way valve 412 is used to allow the pressure medium of the oil circuit in which it is located to flow into the first cylinder port 310e.

[0173] Similarly, the second cylinder port 310f of the actuator cylinder body 310 is respectively connected to the third one-way valve 413 and the fourth one-way valve 414. The third one-way valve 413 is used to allow the pressure medium of the oil circuit in which it is located to only flow out of the second cylinder port 310f; the fourth one-way valve 414 is used to allow the pressure medium of the oil circuit in which it is located to only flow into the second cylinder port 310f.

[0174] In other words, the multiple one-way valves in the hydraulic device 200 of the present application can allow the pressure medium to flow into or out of the variable chamber through different oil paths.

[0175] Reference Figures 3 to 5 As shown, as a specific solution, the hydraulic device 400 further includes: a plurality of switch valves. The switch valves are used to control the on-off of the pressure medium between the hydraulic device 400 and the variable chamber.

[0176] Reference Figures 3 to 5As shown, as a specific solution, the hydraulic device 400 includes a plurality of switch valves, such as a first switch valve 421 and a second switch valve 422. The first switch valve 421 is used to disconnect or conduct the first medium flow path between the two variable chambers, and the first switch valve 421 has a first aperture. The second switch valve 422 is used to disconnect or conduct the second medium flow path between the two variable chambers, and the second switch valve has a second aperture, which is different from the first aperture.

[0177] When the first switch valve 421 is turned on alone, the damping of the relative rotation between the first stabilizer bar 110 and the second stabilizer bar 120 is the first damping; when the second switch valve 422 is turned on alone, the damping of the relative rotation between the first stabilizer bar 110 and the second stabilizer bar 120 is the second damping; when both the first switch valve 421 and the second switch valve 422 are turned on, the damping of the relative rotation between the first stabilizer bar 110 and the second stabilizer bar 120 is the third damping, and the third damping is smaller than the first damping and the second damping.

[0178] The hydraulic device 400 may further include a first accumulator 430, which is mainly used to store pressure medium and maintain the pressure of the pressure medium in the hydraulic device 200. Of course, the pressure of the pressure medium can also be adjusted by the spring of the first accumulator 430. In addition, the first accumulator 430 also has the functions of stabilizing pressure and buffering pressure shock.

[0179] Reference Figure 3 and Figure 4 As shown, as a specific solution, the hydraulic device 400 of the present application integrates the aforementioned one-way valve, switch valve, first accumulator 430 and corresponding pressure sensor into a whole through a hydraulic valve block 460. The hydraulic device 400 is connected to the first cylinder port 310e, the second cylinder port 310f and the third cylinder port 310g respectively through the first oil pipe 451, the second oil pipe 452 and the third oil pipe 453. The advantage of adopting an integrated solution is that the hydraulic device 400 can detect and control the actuator 300 nearby, thereby reducing the delay and interference caused by long-distance detection and control.

[0180] The pressure sensor may include a first pressure sensor 441 and a second pressure sensor 442, which are respectively used to detect the pressure on both sides of the actuator piston 320. As a specific solution, the pressure inside the actuator cylinder body 310 may be replaced by detecting the pressure of the first cylinder port 310e and the second cylinder port 310f.

[0181] As a more specific solution, the stabilizer bar assembly 10 of the present application may also be provided with a first temperature sensor (not shown in the figure) and a second temperature sensor (not shown in the figure) to respectively detect the temperatures of different variable chambers inside the actuator cylinder 310 .

[0182] Reference Figure 5As shown, the first cylinder port 310e is connected to the first one-way valve 411 and the second one-way valve 412 respectively, the second cylinder port 310f is connected to the third one-way valve 413 and the fourth one-way valve 414 respectively; the third cylinder port 310g is connected to the oil storage space of the first accumulator 430.

[0183] As a specific solution, the first switch valve 421 and the second switch valve 422 are both two-position two-way switch valves. One of the valve ports of the first switch valve 421 is connected to the third cylinder port 310g; the other valve port of the first switch valve 421 is respectively connected to the first check valve 411 and the third check valve 413. One of the valve ports of the second switch valve 422 is connected to the third cylinder port 310g; the other valve port of the second switch valve 422 is respectively connected to the first check valve 411 and the third check valve 413.

[0184] The first one-way valve 411 controls the oil flow so that the pressure medium can only flow from the first cylinder port 310e to the first switch valve 421 ; the third one-way valve 413 controls the oil flow so that the pressure medium can only flow from the second cylinder port 310f to the second switch valve 422 .

[0185] The first accumulator 430 is connected to the first cylinder port 310e through the second one-way valve 412 so that the pressure medium can only flow from the first accumulator 430 to the first cylinder port 310e; the first accumulator 430 is connected to the second cylinder port 310f through the fourth one-way valve 414 so that the pressure medium can only flow from the first accumulator 430 to the second cylinder port 310f.

[0186] As a specific plan, refer to Figures 5 to 11 As shown, the hydraulic device 400 further includes: a first outflow oil circuit 401 , a first return oil circuit 403 , a second outflow oil circuit 402 , a second return oil circuit 404 and a return oil circuit 405 .

[0187] The first oil outlet passage 401 is used to connect the first switch valve 421 and the variable chamber; the first one-way valve 411 is arranged in the first oil outlet passage 401 to allow the pressure medium in the first oil outlet passage 401 to flow unidirectionally to the first switch valve 421 .

[0188] The first return oil circuit 403 is used to connect the first switch valve 421 and the variable chamber; the second one-way valve 412 is arranged in the first return oil circuit 403 to allow the pressure medium in the first return oil circuit 403 to flow unidirectionally to the variable chamber.

[0189] The second oil outflow path 402 is used to connect the second switch valve 422 and the variable chamber; the third one-way valve 413 is arranged in the second oil outflow path 402 to allow the pressure medium in the first oil outflow path 401 to flow unidirectionally to the second switch valve 422.

[0190] The second return oil circuit 404 is used to connect the second switch valve 422 and the variable chamber; the fourth one-way valve 414 is arranged in the second return oil circuit 404 to allow the pressure medium in the second return oil circuit 404 to flow unidirectionally to the variable chamber.

[0191] The oil return path 405 is used to connect at least one variable chamber to the oil storage space. In a more specific solution, the oil storage space is formed by the first accumulator 430.

[0192] The first outflow oil passage 401 and the second outflow oil passage 402 are both connected to the first switch valve 421 .

[0193] The first outflow oil passage 401 and the second outflow oil passage 402 are both connected to the second switch valve 422 .

[0194] Reference Figures 5 to 11 As shown, in some embodiments of the present application, the first switch valve 421 and the second switch valve 422 of the present application may have the following gear positions.

[0195] Gear position 1: the first switch valve 421 is closed, and the second switch valve 422 is closed.

[0196] Gear position 2: the first switch valve 421 is open, and the second switch valve 422 is closed.

[0197] Gear position three: the first switch valve 421 is closed and the second switch valve 422 is opened.

[0198] Gear position 4: the first switch valve 421 is open, and the second switch valve 422 is open.

[0199] Reference Figure 5 As shown, in the first gear position, the purpose is to prevent the pressure medium in the hydraulic device 200 from flowing and the actuator piston 320 from moving, that is, it is in the connection mode.

[0200] Reference Figure 6 and 7 As shown, in the first gear position (connection mode), due to the position of the third cylinder port 310g and the action of the first accumulator 430, the actuator piston 320 will automatically return to the position of blocking the third cylinder port 310g, and the pressure on both sides of the actuator piston 320 will also reach a balanced state. Figure 6 and Figure 7 The flow paths of the pressure medium when returning to the center from two different directions are shown respectively. After the actuator piston 320 completes the return to the center, the pressure medium in the hydraulic device 200 stops flowing completely, so that a non-rotating connection is formed between the first stabilizing rod and the second stabilizing rod.

[0201] Reference Figure 8 and Fig. 9As shown, in the fourth gear, all the electromagnetic switches in the hydraulic device 200 are opened, the pressure medium can flow freely, and the actuator piston 320 can move freely, that is, it is in the disconnection mode. Figure 8 and Fig. 9 The flow paths of the pressure medium when the external force causes the actuator piston 320 to slide in different directions are respectively shown.

[0202] Reference Fig.10 and Fig.11 As shown, in the second gear, the pressure medium can flow through the oil path conducted by the first switch valve 421 to make the control piston slide under the action of external force, but the damping effect needs to be overcome during sliding, and a conditional relative rotation occurs between the first stabilizer bar 110 and the second stabilizer bar 120, that is, the torque needs to overcome the sliding damping of the actuator piston 320. And this sliding damping is determined by the opening of the first switch valve 421.

[0203] Similarly, in the third gear, the pressure medium can flow through the oil path conducted by the second switch valve 422 to make the control piston slide under the action of external force, but the sliding needs to overcome the damping effect, and the first stabilizer bar 110 and the second stabilizer bar 120 produce conditional relative rotation, that is, the torque needs to overcome the sliding damping of the actuator piston 320. And this sliding damping is determined by the opening degree (effective opening degree or maximum opening degree) of the second switch valve 422.

[0204] Fig.10 and Fig.11 The flow paths of the pressure medium when the first switch valve 421 and the second switch valve 422 respectively use their own openings for damping are shown.

[0205] Reference Fig.12 As shown, in some embodiments of the present application, the hydraulic device 400 further includes: a proportional valve 570. The proportional valve 570 is used to control the flow of the pressure medium between the hydraulic device 400 and the variable chamber.

[0206] As the second hydraulic device 500 provided in the present application, it only adopts one main control switch valve 523 to control the connection and disconnection between the first cylinder port 310e and the second cylinder port 310f, and is respectively connected to the third cylinder port 310g, the second one-way valve 412 and the fourth one-way valve 414 through a proportional valve 570; in this way, the flow of the proportional valve 570 is controlled to obtain the required damping to hinder the sliding of the actuator piston 320, so that the stabilizer bar assembly 10 obtains the required anti-torsion performance.

[0207] Compared to Figure 5 For the first hydraulic device 200 shown, Fig.12The second hydraulic device 500 shown uses only one main control switch valve 523 for on-off control, and uses a proportional valve 570 to provide various dampings to the actuator piston 320 in a semi-coupled mode, so that the stabilizer bar assembly 10 has various adjustable torsional resistances.

[0208] As a more specific solution, the proportional valve 570 may also be integrated with the hydraulic device 400 via the hydraulic valve block 460 .

[0209] Reference Fig.12 As shown, in the specific scheme of the example in the figure, the hydraulic device 500 includes: a main control switch, a proportional valve 570, a fifth one-way valve 511, a sixth one-way valve 512, a seventh one-way valve 513 and an eighth one-way valve 514, a second accumulator 530, and a sensor.

[0210] In addition, the hydraulic device also includes: a first switch flow path 515, a second switch flow path 516, a first output oil path 501, a first return oil path 503, a second output oil path 502, a second return oil path 504 and a return oil path 505 connected to the above-mentioned valves.

[0211] The main control switch is used to disconnect or connect the first medium flow path between the two variable chambers; the proportional valve 570 is used to control the flow rate of the pressure medium in the second medium flow path between the two variable chambers. Fig.12 In the specific embodiment shown, the main control switch is the main control switch valve 523 mentioned above.

[0212] The first switch flow path 515 is used to connect the main control switch and one of the two variable chambers; the second switch flow path 516 is used to connect the main control switch and the other of the two variable chambers.

[0213] The first output oil circuit 501 is used to connect the proportional valve 570 and the variable chamber; the fifth one-way valve 511 is arranged in the first output oil circuit 501 to allow the pressure medium in the first output oil circuit 501 to flow to the proportional valve 570 in one direction.

[0214] The first return oil circuit 503 is used to connect the proportional valve 570 and the variable chamber; the sixth one-way valve 512 is arranged in the first return oil circuit 503, and is used to make the pressure medium in the first return oil circuit 503 flow to the variable chamber in one direction.

[0215] The second output oil circuit 502 is used to connect the proportional valve 570 and the variable chamber; the seventh one-way valve 513 is arranged in the second output oil circuit 502 to allow the pressure medium in the second output oil circuit 502 to flow to the proportional valve 570 in one direction.

[0216] The second oil return circuit 504 is used to connect the proportional valve 570 and the variable chamber; the eighth one-way valve 514 is arranged in the second oil return circuit 504, and is used to make the pressure medium in the second oil return circuit 504 flow to the variable chamber in one direction.

[0217] The return oil circuit 505 is used to connect at least one variable chamber to the proportional valve 570 .

[0218] The return oil circuit 505 , the first return oil circuit 503 , and the second return oil circuit 504 are all connected to the proportional valve 570 . The return oil circuit 505 , the first return oil circuit 503 , and the second return oil circuit 504 are all connected to the proportional valve 570 .

[0219] The first switch flow path 515 is connected to the first output oil path 501 and the first return oil path 503 , respectively; the second switch flow path is connected to the second output oil path 502 and the second return oil path 504 , respectively.

[0220] The first output oil circuit 501 and the second output oil circuit 502 are both connected to the inflow end of the proportional valve 570 ; the first return oil circuit 503 , the second return oil circuit 504 and the return oil circuit 505 are all connected to the outflow end of the proportional valve 570 .

[0221] The second accumulator 530 is used to form an oil storage space; the second accumulator 530 is connected to the inflow end of the proportional valve 570 .

[0222] The sensor is used to detect the pressure and / or temperature of the pressure medium in the hydraulic device 500 .

[0223] In summary, refer to Figures 1 to 5 As shown, the technical solution of the present application further provides an actuator 300 for controlling the relative rotation of the first stabilizer bar 110 and the second stabilizer bar 120 in the stabilizer bar assembly 10 ; the actuator 300 includes: an actuator cylinder 310 and an actuator piston 320 . Among them, the actuator cylinder 310 is formed with a cylinder inner cavity 310a; the actuator piston 320 is movably arranged inside the actuator cylinder 310 and divides the cylinder inner cavity 310a into a plurality of variable chambers; wherein the actuator piston 320 and the actuator cylinder 310 constitute a ball screw mechanism; the actuator cylinder 310 is provided with a first cylinder port 310e, a second cylinder port 310f and a third cylinder port 310g; the third cylinder port 310g is arranged between the first cylinder port 310e and the second cylinder port 310f, so that the actuator piston 320 closes the third cylinder port 310g under the action of the pressure medium of the first cylinder port 310e and / or the second cylinder port 310f; the actuator cylinder 310 and the first stabilizing rod 110 form a anti-rotation connection; the actuator piston 320 and the second stabilizing rod 120 form a anti-rotation connection.

[0224] like Fig.13, which is a schematic diagram of the structure of a vehicle 1 provided in an embodiment of the present application. In this embodiment, the vehicle 1 includes the aforementioned stabilizer bar assembly 10. In this embodiment, the vehicle 1 may be a fuel vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., and the present disclosure does not specifically limit this.

[0225] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0226] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0227] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0228] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A stabilizer bar assembly, characterized in that: The stabilizer bar assembly comprises: A rod system, including a first stabilizer rod and a second stabilizer rod; An execution device, provided with a plurality of variable chambers; A hydraulic device, respectively connected to the plurality of variable chambers to adjust the flow direction and / or flow rate of the pressure medium in the variable chambers; The actuator is connected to the first stabilizer bar and the second stabilizer bar respectively, so that the actuator adjusts the damping of the relative rotation between the first stabilizer bar and the second stabilizer bar under the drive of the hydraulic device.

2. The stabilizer bar assembly according to claim 1, characterized in that: in, The hydraulic device comprises: The first switch valve is used to disconnect or connect the first medium flow path between the two variable chambers, and the first switch valve has a first aperture.

3. The stabilizer bar assembly according to claim 2, characterized in that: in, The hydraulic device also includes: The second switch valve is used to disconnect or connect the second medium flow path between the two variable chambers. The second switch valve has a second aperture, which is different from the first aperture.

4. The stabilizer bar assembly according to claim 3, Features: in, When the first switch valve is turned on alone, the damping of the relative rotation between the first stabilizing bar and the second stabilizing bar is the first damping; When the second switch valve is turned on alone, the damping of the relative rotation between the first stabilizing bar and the second stabilizing bar is the second damping; When the first switch valve and the second switch valve are both turned on, the damping of the relative rotation between the first stabilizing bar and the second stabilizing bar is a third damping, and the third damping is smaller than the first damping and the second damping.

5. The stabilizer bar assembly according to claim 3, Features: Wherein, the hydraulic device further comprises: a first outflow oil passage, used for connecting the first switch valve and the variable chamber; The first one-way valve is disposed in the first oil outflow passage, and is used to allow the pressure medium in the first oil outflow passage to flow to the first switch valve in a one-way manner.

6. The stabilizer bar assembly according to claim 5, Features: Wherein, the hydraulic device further comprises: a first return oil circuit, used for connecting the first switch valve and the variable chamber; The second one-way valve is arranged in the first return oil circuit, and is used to make the pressure medium in the first return oil circuit flow to the variable chamber in one direction.

7. The stabilizer bar assembly according to claim 3, Features: Wherein, the hydraulic device further comprises: a second outflow oil passage, used for connecting the second switch valve and the variable chamber; The third one-way valve is arranged in the second oil outlet passage, and is used for allowing the pressure medium in the first oil outlet passage to flow to the second switch valve in one direction.

8. The stabilizer bar assembly according to claim 7, Features: Wherein, the hydraulic device further comprises: a second return oil circuit, used for connecting the second switch valve and the variable chamber; A fourth one-way valve is provided in the second return oil circuit, and is used to allow the pressure medium in the second return oil circuit to flow to the variable chamber in one direction.

9. The stabilizer bar assembly according to claim 3, characterized in that: in, The hydraulic device also includes: The oil return circuit is used to connect at least one of the variable chambers to the oil storage space.

10. The stabilizer bar assembly according to claim 9, Features: Wherein, the hydraulic device further comprises: a first return oil circuit, used for connecting the first switch valve and the variable chamber; a second one-way valve, disposed in the first return oil circuit, for allowing the pressure medium in the first return oil circuit to flow to the variable chamber in one direction; Wherein, when the first switch valve and the second switch valve are both disconnected, the pressure medium between the variable chambers of the hydraulic device flows through the return oil passage and the first return oil passage.

11. The stabilizer bar assembly according to claim 9, Features: in, The hydraulic device also includes: a second return oil circuit, used for connecting the second switch valve and the variable chamber; a fourth one-way valve, disposed in the second return oil circuit, for allowing the pressure medium in the second return oil circuit to flow to the variable chamber in one direction; Wherein, when the first switch valve and the second switch valve are both disconnected, the pressure medium between the variable chambers of the hydraulic device flows through the central return oil passage and the second return oil passage.

12. The stabilizer bar assembly according to claim 9, Features: in, The hydraulic device also includes: a first return oil circuit, used for connecting the first switch valve and the variable chamber; a second one-way valve, disposed in the first return oil circuit, for allowing the pressure medium in the first return oil circuit to flow to the variable chamber in one direction; a second return oil circuit, used for connecting the second switch valve and the variable chamber; a fourth one-way valve, disposed in the second return oil circuit, for allowing the pressure medium in the second return oil circuit to flow to the variable chamber in one direction; Wherein, the central return oil circuit, the first return oil circuit, and the second return oil circuit are all connected to the oil storage space.

13. The stabilizer bar assembly according to claim 12, characterized in that: in, The hydraulic device also includes: The accumulator is used to form the oil storage space.

14. The stabilizer bar assembly according to claim 3, Features: Wherein, the hydraulic device further comprises: a first outflow oil passage, used for connecting the first switch valve and the variable chamber; a first one-way valve, disposed in the first oil outflow passage, and configured to allow the pressure medium in the first oil outflow passage to flow to the first switch valve in one direction; a second outflow oil passage, used for connecting the second switch valve and the variable chamber; The third one-way valve is arranged in the second oil outlet passage, and is used for allowing the pressure medium in the first oil outlet passage to flow to the second switch valve in one direction.

15. The stabilizer bar assembly according to claim 14, characterized in that: in, The first outflow oil passage and the second outflow oil passage are both connected to the first switch valve.

16. The stabilizer bar assembly according to claim 15, characterized in that: in, The first outflow oil passage and the second outflow oil passage are both connected to the second switching valve.

17. The stabilizer bar assembly according to claim 1, Features: Wherein, the hydraulic device comprises: A main control switch, used for disconnecting or connecting the first medium flow path between the two variable chambers; A proportional valve is used to control the flow rate of the pressure medium in the second medium flow path between the two variable chambers.

18. The stabilizer bar assembly according to claim 17, Features: Wherein, the hydraulic device comprises: A first output oil circuit, used for connecting the proportional valve and the variable chamber; A fifth one-way valve is provided in the first output oil circuit, and is used to allow the pressure medium in the first output oil circuit to flow to the proportional valve in one direction.

19. The stabilizer bar assembly according to claim 18, Features: Wherein, the hydraulic device comprises: A first return oil circuit, used for connecting the proportional valve and the variable chamber; A sixth one-way valve is provided in the first return oil circuit, and is used to allow the pressure medium in the first return oil circuit to flow unidirectionally to the variable chamber.

20. The stabilizer bar assembly according to claim 17, Features: Wherein, the hydraulic device comprises: a second output oil circuit, used for connecting the proportional valve and the variable chamber; A seventh one-way valve is provided in the second output oil circuit, and is used to allow the pressure medium in the second output oil circuit to flow to the proportional valve in one direction.

21. The stabilizer bar assembly according to claim 20, Features: Wherein, the hydraulic device comprises: A second oil return circuit, used for connecting the proportional valve and the variable chamber; An eighth one-way valve is provided in the second return oil circuit, and is used to allow the pressure medium in the second return oil circuit to flow unidirectionally to the variable chamber.

22. The stabilizer bar assembly according to claim 17, characterized in that: in, The hydraulic device comprises: The return oil circuit is used to connect at least one of the variable chambers to the proportional valve.

23. The stabilizer bar assembly according to claim 22, Features: Wherein, the hydraulic device comprises: A first return oil circuit, used for connecting the proportional valve and the variable chamber; a sixth one-way valve, disposed in the first return oil circuit, and used to allow the pressure medium in the first return oil circuit to flow to the variable chamber in one direction; A second oil return circuit, used for connecting the proportional valve and the variable chamber; an eighth one-way valve, disposed in the second oil return path, for allowing the pressure medium in the second oil return path to flow to the variable chamber in one direction; Wherein, the return oil circuit, the first return oil circuit, and the second return oil circuit are all connected to the proportional valve.

24. The stabilizer bar assembly according to claim 22, Features: Wherein, the hydraulic device comprises: A first output oil circuit, used for connecting the proportional valve and the variable chamber; a fifth one-way valve, disposed in the first output oil circuit, and configured to allow the pressure medium in the first output oil circuit to flow to the proportional valve in one direction; a second output oil circuit, used for connecting the proportional valve and the variable chamber; a seventh one-way valve, provided in the second output oil circuit, for allowing the pressure medium in the second output oil circuit to flow to the proportional valve in one direction; Wherein, the first output oil circuit and the second output oil circuit are both connected to the proportional valve.

25. The stabilizer bar assembly according to claim 17, Features: Wherein, the hydraulic device comprises: A first switch flow path, used to connect the main control switch and one of the two variable chambers; The second switch flow path is used to connect the main control switch and the other of the two variable chambers.

26. The stabilizer bar assembly according to claim 25, Features: Wherein, the hydraulic device comprises: A first output oil circuit, used for connecting the proportional valve and the variable chamber; a fifth one-way valve, disposed in the first output oil circuit, and configured to allow the pressure medium in the first output oil circuit to flow to the proportional valve in one direction; A first return oil circuit, used for connecting the proportional valve and the variable chamber; a sixth one-way valve, disposed in the first return oil circuit, and used to allow the pressure medium in the first return oil circuit to flow to the variable chamber in one direction; a second output oil circuit, used for connecting the proportional valve and the variable chamber; a seventh one-way valve, provided in the second output oil circuit, for allowing the pressure medium in the second output oil circuit to flow to the proportional valve in one direction; A second oil return circuit, used for connecting the proportional valve and the variable chamber; an eighth one-way valve, disposed in the second oil return path, for allowing the pressure medium in the second oil return path to flow to the variable chamber in one direction; a return oil circuit, used to connect at least one of the variable chambers to the proportional valve; The first switch flow path is connected to the first output oil path and the first return oil path respectively; the second switch flow path is connected to the second output oil path and the second return oil path respectively.

27. The stabilizer bar assembly according to claim 26, characterized in that: in, The first output oil circuit and the second output oil circuit are both connected to the inflow end of the proportional valve; the first return oil circuit, the second return oil circuit and the return oil circuit are all connected to the outflow end of the proportional valve.

28. The stabilizer bar assembly according to claim 27, characterized in that: in, The hydraulic device comprises: An accumulator, used to form an oil storage space; Wherein, the accumulator is connected to the inflow end of the proportional valve.

29. The stabilizer bar assembly according to claim 28, characterized in that: in, The hydraulic device comprises: A sensor is used to detect the pressure and / or temperature of the pressure medium in the hydraulic device.

30. The stabilizer bar assembly according to claim 1, characterized in that: The execution device comprises: An execution cylinder body is formed with a cylinder inner cavity; An actuating piston is movably disposed inside the actuating cylinder and divides the inner cavity of the cylinder into a plurality of variable chambers; Wherein, the actuator cylinder body is provided with a first cylinder port, a second cylinder port and a third cylinder port; the third cylinder port is arranged between the first cylinder port and the second cylinder port, so that the actuator piston can close the third cylinder port through the piston sealing assembly under the action of the pressure medium of the first cylinder port and / or the second cylinder port.

31. The stabilizer bar assembly according to claim 30, characterized in that: in, The actuating piston and the actuating cylinder form a ball screw mechanism.

32. The stabilizer bar assembly according to claim 31, Features: in, The actuator cylinder comprises: An intermediate housing, forming the inner cavity of the cylinder body and the third cylinder port; a first end cover, forming the first cylinder port; a second end cover, forming the second cylinder port; Wherein, the intermediate shell is arranged between the first end cover and the second end cover.

33. A vehicle, characterized in that: A stabilizer bar assembly comprising any one of claims 1 to 32.

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