Disconnectable hydraulic stabilizer bar assembly

Abstract

The invention relates to a disconnectable hydraulic stabilizer bar assembly. The disconnectable hydraulic stabilizer bar assembly comprises a hydraulic cylinder body, a front flange is installed on the front portion of the hydraulic cylinder body, a rear flange is installed on the rear portion of the hydraulic cylinder body, a piston rod is sleeved with the front flange, an inner thread sleeve is installed on the rear portion of the piston rod, and balls are installed between the inner thread sleeve and an outer thread sleeve; a piston plate is arranged in the middle of the piston rod, a first oil guide block and a second oil guide block are welded to the side wall of the hydraulic cylinder body, an oil path block is installed on the rear flange, an oil return hole is formed in the rear flange, and an energy accumulator used for storing hydraulic oil energy, a first electromagnetic valve and a second electromagnetic valve are installed on the oil path block and used for controlling on-off of an oil path in the oil path block. A first connecting rod is installed on the front portion of the piston rod, and a second connecting rod is installed on the rear portion of the rear flange. The stabilizer bar assembly has the beneficial effects that the stabilizer bar assembly ensures that the excellent stability of a vehicle can be kept, and the comfortable feeling of riding and the trafficability of severe road conditions can be considered at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of automobile stabilizer bars, and in particular to a disconnectable hydraulic stabilizer bar assembly. Background Art

[0002] The functions of a car stabilizer bar are mainly two: one is to improve the roll stability of the vehicle when turning or driving on uneven roads to ensure the smooth driving of the vehicle; the other is to improve the handling performance of the vehicle so that the driver can control the direction and posture of the vehicle more accurately.

[0003] The traditional passive stabilizer bar works by passively responding to external forces and deformations. When the vehicle turns, the body will roll due to the centrifugal force, causing the suspension system of one wheel to be compressed and the other side to be stretched. At this time, the passive stabilizer bar will resist this roll through its elastic characteristics, thereby balancing the body. The geometric parameters and structure of the passive stabilizer bar are fixed, so its stiffness is also fixed and cannot be adjusted in real time according to the vehicle's driving state and road conditions. This fixed stiffness feature may result in the stabilizer bar being unable to provide sufficient anti-roll torque in the case of uneven roads and high-speed turning roads, thereby failing to effectively suppress the body roll; and in the case of uneven roads (such as potholes, bumps, etc.) and reduced grip, excessive stiffness may reduce the smoothness of the vehicle's driving. Summary of the invention

[0004] The purpose of the present invention is to overcome the above problems existing in the prior art and provide a disconnectable hydraulic stabilizer bar assembly.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A disconnectable hydraulic stabilizer bar assembly comprises a cylindrical hydraulic cylinder body, a circular front flange is installed at the front of the hydraulic cylinder body, a circular rear flange is installed at the rear of the hydraulic cylinder body, a piston rod extending into an outer thread sleeve is sleeved in the front flange, an inner thread sleeve is installed at the rear of the piston rod, and N groups of balls are installed between the inner thread sleeve and the outer thread sleeve;

[0007] A piston plate is provided at the middle of the piston rod for dividing the interior of the hydraulic cylinder body into a front chamber and a rear chamber, a first oil guide block connected to the rear chamber and a second oil guide block connected to the front chamber are welded on the side wall of the hydraulic cylinder body, an oil circuit block is installed on the rear flange, an oil return hole connected to the oil circuit block is opened on the rear flange, the first oil guide block is connected to the oil circuit in the oil circuit block through a first oil pipe, the second oil guide block is connected to the oil circuit in the oil circuit block through a second oil pipe, an accumulator for storing hydraulic oil energy, and a first solenoid valve and a second solenoid valve for controlling the on-off of the oil circuit in the oil circuit block are installed on the oil circuit block;

[0008] A first connecting rod is installed at the front of the piston rod, and a second connecting rod is installed at the rear of the rear flange.

[0009] Among them, the inner side of the front flange is installed with a first guide ring, a dust ring, a first sealing ring, and a second guide ring in sequence from the front, the outer side of the front flange is installed with a second sealing ring, and the outer side of the piston plate is installed with a piston ring sealing ring.

[0010] Wherein, a first sensor and a second sensor for monitoring the hydraulic oil pressure in the oil circuit block are installed on the oil circuit block.

[0011] Wherein, the oil circuit block is provided with an oil filling hole connected with the oil circuit in the oil circuit block, and a plug is screwed in the oil filling hole.

[0012] Among them, the first connecting rod is pressed with a first limiting ring, a first bushing and a second limiting ring, the first bushing is installed with a first clamp, the second connecting rod is pressed with a third limiting ring, a second bushing and a fourth limiting ring, and the second bushing is installed with a second clamp.

[0013] Among them, the front and rear ends of the inner screw sleeve are respectively installed with a guide cover lower cover and a guide cover upper cover, the outer side of the guide cover lower cover is provided with guide teeth, the inner side of the outer screw sleeve is provided with N spiral outer raceways, the guide teeth are slidably matched with the outer raceways, and the outer side of the inner screw sleeve is provided with N spiral inner raceways, and a group of balls are rollingly installed in each of the outer raceways and the corresponding inner raceways.

[0014] Wherein, a connecting nut is threadedly connected to the rear part of the piston rod to prevent the inner thread sleeve from axially moving on the piston rod, and the head of the connecting nut abuts against the inner thread sleeve.

[0015] Among them, the two ends of the first oil pipe are respectively installed and fixed to the oil circuit block and the first oil guide block through the first oil pipe locking nut and the second oil pipe locking nut; the two ends of the second oil pipe are respectively installed and fixed to the oil circuit block and the second oil guide block through the third oil pipe locking nut and the fourth oil pipe locking nut.

[0016] As a preferred embodiment, the hydraulic cylinder body is connected to the outer threaded sleeve via a first flat key, the piston rod is connected to the inner threaded sleeve via a second flat key, the front flange is threadedly connected to the hydraulic cylinder body, the first connecting rod is welded to the piston rod, and the second connecting rod is welded to the rear flange.

[0017] As another preferred embodiment, the hydraulic cylinder body is connected to the outer threaded sleeve by laser welding, the piston rod is connected to the inner threaded sleeve by a spline connection, and the front flange is connected to the hydraulic cylinder body by laser welding; the first connecting rod is connected to the piston rod by a spline connection, and the second connecting rod is connected to the rear flange by a spline connection.

[0018] The beneficial effects of the present invention are as follows: the stabilizer bar assembly can effectively resist roll when the car is turning, thereby enhancing the stability of the vehicle; at the same time, when encountering complex road conditions where one side of the wheel encounters a towering obstacle, sinks into a deep pothole, or the wheels on both sides cross a significant height difference, it can simulate the effect of disconnecting the stabilizer bar and make flexible adjustments, thereby resolving the contradiction between stability and driving comfort and passability; therefore, the stabilizer bar assembly ensures that the vehicle can maintain excellent stability performance while taking into account both the riding comfort and the passability in adverse road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the stabilizer bar assembly in the first embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a stabilizer bar assembly in a first embodiment of the present invention from a top view;

[0022] Figure 3 yes Figure 2 Schematic diagram of the structure in the middle AA direction;

[0023] Figure 4 yes Figure 3 The schematic diagram of the structure after the middle part is enlarged;

[0024] Figure 5 is a schematic structural diagram of a side view of a stabilizer bar assembly in Embodiment 1 of the present invention;

[0025] Figure 6 is a schematic structural diagram of a cross-section of a stabilizer bar assembly in Embodiment 2 of the present invention;

[0026] Figure 7 yes Figure 6 The schematic diagram of the structure after the middle part is enlarged;

[0027] Explanation of the reference numerals in the figure: hydraulic cylinder body 1, outer screw sleeve 2, first flat key 3, guide cover lower cover 4, inner screw sleeve 5, ball 6, guide cover upper cover 7, piston ring seal 8, second flat key 9, connecting nut 10, piston rod 11, second guide ring 12, second seal 13, first seal 14, dust ring 15, first guide ring 16, front flange 17, oil return hole 18, rear flange 19, oil block 20, first oil pipe 21, first oil pipe locking nut 22, second oil pipe locking nut 23, first guide Oil block 24, second oil guide block 25, fourth oil pipe locking nut 26, second oil pipe 27, third oil pipe locking nut 28, first solenoid valve 29, second solenoid valve 30, first sensor 31, second sensor 32, accumulator 33, first connecting rod 34, second connecting rod 35, third limiting ring 36, fourth limiting ring 37, second clamp 38, first limiting ring 39, second limiting ring 40, first clamp 41, oil filling hole 42, first bushing 43, second bushing 44, piston plate 45. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0029] like Figures 1 to 5 The first embodiment shown is a disconnectable hydraulic stabilizer bar assembly, comprising a cylindrical hydraulic cylinder body 1 .

[0030] A circular front flange 17 is installed at the front of the hydraulic cylinder body 1, and the front flange 17 is screwed to the hydraulic cylinder body 1; and a first guide ring 16, a dust ring 15, a first sealing ring 14, and a second guide ring 12 are installed on the inner side of the front flange 17 in sequence from the front, and a second sealing ring 13 is installed on the outer side of the front flange 17.

[0031] An annular outer screw sleeve 2 and a circular rear flange 19 are installed at the rear of the hydraulic cylinder body 1. The hydraulic cylinder body 1 is connected to the outer screw sleeve 2 through a first flat key 3. A piston rod 11 extending into the outer screw sleeve 2 is sleeved in the front flange.

[0032] An inner thread sleeve 5 is installed at the rear of the piston rod 11, and the piston rod 11 and the inner thread sleeve 5 are connected by a second flat key 9; and a connecting nut 10 is threadedly connected to the rear of the piston rod 11 to prevent the inner thread sleeve 5 from axially moving on the piston rod 11, and the head of the connecting nut 10 abuts against the inner thread sleeve 5.

[0033] Six groups of balls 6 are installed between the inner screw sleeve 5 and the outer screw sleeve 2. Specifically, the front and rear ends of the inner screw sleeve 5 are respectively installed with a guide cover lower cover 4 and a guide cover upper cover 7. The outer side of the guide cover lower cover 4 is provided with guide teeth, and the inner side of the outer screw sleeve 2 is provided with six spiral outer raceways, and the guide teeth are slidably matched with the outer raceways. Six spiral inner raceways are provided on the outer side of the inner screw sleeve 5, and a group of balls 6 are rollingly installed in each outer raceway and the corresponding inner raceway.

[0034] A piston plate 45 is provided in the middle of the piston rod 11 to divide the interior of the hydraulic cylinder body 1 into a front chamber and a rear chamber, and a piston ring seal 8 is installed on the outer side of the piston plate 45;

[0035] An oil circuit block 20 is installed on the rear flange 19, and an oil return hole 18 connected to the oil circuit block 20 is opened on the rear flange 19; a first oil guide block 24 connected to the rear chamber is welded on the side wall of the hydraulic cylinder body 1, and the first oil guide block 24 is connected to the oil circuit in the oil circuit block 20 through the first oil pipe 21, and the two ends of the first oil pipe 21 are respectively fixed to the oil circuit block 20 and the first oil guide block 24 through the first oil pipe locking nut 22 and the second oil pipe locking nut 23; a second oil guide block 25 connected to the front chamber is welded on the side wall of the hydraulic cylinder body 1, and the second oil guide block 25 is connected to the oil circuit in the oil circuit block 20 through the second oil pipe 27, and the two ends of the second oil pipe 27 are respectively fixed to the oil circuit block 20 and the second oil guide block 25 through the third oil pipe locking nut 28 and the fourth oil pipe locking nut 26.

[0036] An accumulator 33 for storing hydraulic oil energy, and a first solenoid valve 29 and a second solenoid valve 30 for controlling the opening and closing of the oil circuit in the oil circuit block 20 are installed on the oil circuit block 20 .

[0037] The oil block 20 is also provided with a first sensor 31 and a second sensor 32 for monitoring the pressure of the hydraulic oil in the oil block. Both the first sensor 31 and the second sensor 32 are hydraulic pressure sensors.

[0038] The oil block 20 is also provided with an oil filling hole 42 connected with the oil path in the oil block 20 , and a plug is threadedly connected in the oil filling hole 42 .

[0039] A first connecting rod 34 is installed at the front of the piston rod 11. Specifically, the first connecting rod 34 is welded to the piston rod 11. A first limiting ring 39, a first bushing 43 and a second limiting ring 40 are pressed onto the first connecting rod 34. A first clamp 41 is installed on the first bushing 43.

[0040] A second connecting rod 35 is installed at the rear of the rear flange 19. Specifically, the second connecting rod 35 is welded to the rear flange 19. A third limiting ring 36, a second bushing 44 and a fourth limiting ring 37 are pressed onto the second connecting rod 35. A second clamp 38 is installed on the second bushing 38.

[0041] The stabilizer bar assembly is in the normal connection state:

[0042] When the vehicle is traveling on a smooth road or a paved urban road, the suspension travel sensor or steering wheel angle sensor installed on the vehicle receives road information and transmits it to the vehicle control system. The first solenoid valve 29 and the second solenoid valve 30 are controlled to be in a closed state according to logical judgment, and the hydraulic oil cannot flow through the return oil hole 18, the first oil guide block 24, and the second oil guide block 25. The piston rod 11 is locked at a predetermined position, and the first connecting rod 34 cannot extend into the hydraulic cylinder body 1. The stabilizer bar maintains the connection between the left and right wheels through the hydraulic system. The stabilizer bar provides support for the vehicle to prevent the vehicle from excessive vibration or roll during driving, thereby improving the handling and driving stability.

[0043] The oil circuit block 20 is provided with a first oil passage, a second oil passage and a third oil passage connected to the accumulator. The first sensor 32 and the first solenoid valve 29 are located on the first oil passage, and the first oil passage is connected to the oil return hole 18; the second oil passage is connected to the first oil pipe and the first oil guide block in sequence; the second sensor and the second solenoid valve 30 are located on the third oil passage, and the third oil passage is connected to the second oil pipe and the second oil guide block in sequence.

[0044] Working principle,

[0045] When the first solenoid valve 29 and the second solenoid valve 30 are powered on and open:

[0046] If the piston rod moves from the position close to the front flange toward the second connecting rod 35, the hydraulic oil between the piston plate 45 and the rear flange 19 flows into the accumulator through the oil return hole 18 and the first oil passage in the oil block, and the hydraulic oil in the accumulator flows into the space between the piston plate and the front flange through the third oil passage, the second oil pipe, and the second oil guide block, or the hydraulic oil in the accumulator flows into the space between the piston plate and the front flange through the second oil passage, the first oil pipe, and the first oil guide block;

[0047] If the piston rod moves from the position close to the outer screw sleeve toward the first connecting rod 35, the hydraulic oil between the piston rod and the front flange flows into the accumulator through the second oil guide block, the second oil pipe, and the third oil channel, or the hydraulic oil between the piston rod and the front flange flows into the accumulator through the first oil guide block, the first oil pipe, and the second oil channel, and the hydraulic oil in the accumulator flows into between the piston plate and the rear flange through the first oil channel and the oil return hole;

[0048] That is, when the first solenoid valve 29 and the second solenoid valve 30 are powered on and open, the piston rod can rotate in the hydraulic cylinder body 1, so that the first connecting rod can rotate and move relative to the second connecting rod, thereby disconnecting the stabilizing rod.

[0049] When the first solenoid valve 29 and the second solenoid valve 30 are powered off and closed:

[0050] If the piston rod moves from the position close to the outer screw sleeve toward the first connecting rod 35, the hydraulic oil between the piston rod and the front flange flows into the accumulator through the first oil guide block, the first oil pipe, and the second oil channel. When the piston plate moves to the position of blocking the oil hole of the first oil guide block, the hydraulic oil between the piston plate and the front flange stops flowing out, the hydraulic oil in the hydraulic cylinder body is in a stationary state, and the piston rod can no longer move in the hydraulic oil lever.

[0051] If the piston rod moves from the position close to the front flange toward the second connecting rod 35, the hydraulic oil between the piston plate and the rear flange flows into the accumulator through the first oil guide block, the first oil pipe, and the second oil channel. When the piston plate moves to the position of blocking the oil hole of the first oil guide block, the hydraulic oil between the piston plate and the front flange stops flowing out, the hydraulic oil in the hydraulic cylinder body is in a stationary state, and the piston rod can no longer move in the hydraulic oil lever.

[0052] That is, when the first solenoid valve 29 and the second solenoid valve 30 are powered off and closed, when the piston plate moves to the position of blocking the oil hole of the first oil guide block, the piston rod is fixed in the hydraulic cylinder, so that the first connecting rod cannot rotate or move relative to the second connecting rod. The first connecting rod and the second connecting rod can only twist themselves to balance the vehicle.

[0053] In summary, when the vehicle needs to cope with extreme off-road scenarios or requires a larger wheel rebound stroke (such as when getting out of trouble), the vehicle control system will determine whether it is necessary to disconnect the stabilizer bar based on the vehicle status information fed back by the suspension travel sensor or the steering wheel angle sensor. Once the vehicle control system issues a stabilizer bar disconnection command, it controls the first solenoid valve 29 and the second solenoid valve 30 to be in an open state, and the hydraulic oil flows in the front chamber, the rear chamber, and the oil circuit block through the return oil hole 18, the first oil guide block 24, and the second oil guide block 25 to disconnect the stabilizer bar. The piston rod 11 is connected to the first connecting rod 34, and the rear flange 19 is connected to the second connecting rod 35. According to the state of wheel bouncing, the piston rod 11 can release the maximum stroke of the first connecting rod by telescoping, giving the wheel space for vertical displacement up and down, so that the tire can contact the ground more closely, generate greater adhesion, and improve the passability of harsh road conditions.

[0054] like Figure 6 and Figure 7 The second embodiment shown is different from the first embodiment in that: the hydraulic cylinder body 1 is connected to the outer threaded sleeve 5 by laser welding, the piston rod 11 is connected to the inner threaded sleeve 5 by a spline connection, and the front flange 17 is connected to the hydraulic cylinder body 1 by laser welding; the first connecting rod 34 is connected to the piston rod 11 by a spline connection, and the second connecting rod 35 is connected to the rear flange 19 by a spline connection.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A disconnectable hydraulic stabilizer bar assembly, characterized in that: It comprises a cylindrical hydraulic cylinder body, wherein a circular front flange is installed at the front of the hydraulic cylinder body, a circular rear flange is installed at the rear of the hydraulic cylinder body, a piston rod extending into an outer thread sleeve is sleeved in the front flange, an inner thread sleeve is installed at the rear of the piston rod, and N groups of balls are installed between the inner thread sleeve and the outer thread sleeve; A piston plate is provided at the middle of the piston rod for dividing the interior of the hydraulic cylinder body into a front chamber and a rear chamber, a first oil guide block connected to the rear chamber and a second oil guide block connected to the front chamber are welded on the side wall of the hydraulic cylinder body, an oil circuit block is installed on the rear flange, an oil return hole connected to the oil circuit block is opened on the rear flange, the first oil guide block is connected to the oil circuit in the oil circuit block through a first oil pipe, the second oil guide block is connected to the oil circuit in the oil circuit block through a second oil pipe, an accumulator for storing hydraulic oil energy, and a first solenoid valve and a second solenoid valve for controlling the on-off of the oil circuit in the oil circuit block are installed on the oil circuit block; A first connecting rod is installed at the front of the piston rod, and a second connecting rod is installed at the rear of the rear flange.

2. The stabilizer bar assembly according to claim 1, characterized in that: The inner side of the front flange is installed with a first guide ring, a dust ring, a first sealing ring, and a second guide ring in sequence from the front, the outer side of the front flange is installed with a second sealing ring, and the outer side of the piston plate is installed with a piston ring sealing ring.

3. The stabilizer bar assembly according to claim 1, characterized in that: The oil block is equipped with a first sensor and a second sensor for monitoring the pressure of the hydraulic oil in the oil block.

4. The stabilizer bar assembly according to claim 1, characterized in that: The oil circuit block is provided with an oil filling hole connected with the oil circuit in the oil circuit block, and a plug is screwed in the oil filling hole.

5. The stabilizer bar assembly according to claim 1, characterized in that: The first connecting rod is press-fitted with a first limiting ring, a first bushing and a second limiting ring, the first bushing is installed with a first clamp, the second connecting rod is press-fitted with a third limiting ring, a second bushing and a fourth limiting ring, and the second bushing is installed with a second clamp.

6. The stabilizer bar assembly according to claim 1, characterized in that: A guide cover lower cover and a guide cover upper cover are respectively installed at the front and rear ends of the inner screw sleeve, the outer side of the guide cover lower cover is provided with guide teeth, the inner side of the outer screw sleeve is provided with N spiral outer raceways, the guide teeth are slidably matched with the outer raceways, and the outer side of the inner screw sleeve is provided with N spiral inner raceways, and a group of balls are rollingly installed in each of the outer raceways and the corresponding inner raceway.

7. The stabilizer bar assembly according to claim 1, characterized in that: The rear part of the piston rod is connected with a connecting nut which prevents the inner thread sleeve from axially moving on the piston rod, and the head of the connecting nut is connected with the inner thread sleeve.

8. The stabilizer bar assembly according to claim 1, characterized in that: The two ends of the first oil pipe are respectively fixed to the oil circuit block and the first oil guide block through the first oil pipe locking nut and the second oil pipe locking nut; the two ends of the second oil pipe are respectively fixed to the oil circuit block and the second oil guide block through the third oil pipe locking nut and the fourth oil pipe locking nut.

9. The stabilizer bar assembly according to any one of claims 1 to 8, characterized in that: The hydraulic cylinder body is connected to the outer thread sleeve via a first flat key, the piston rod is connected to the inner thread sleeve via a second flat key, the front flange is screwed to the hydraulic cylinder body, the first connecting rod is welded to the piston rod, and the second connecting rod is welded to the rear flange.

10. The stabilizer bar assembly according to any one of claims 1 to 8, characterized in that: The hydraulic cylinder body is connected to the outer threaded sleeve by laser welding, the piston rod is connected to the inner threaded sleeve by spline connection, and the front flange is connected to the hydraulic cylinder body by laser welding; the first connecting rod is connected to the piston rod by spline connection, and the second connecting rod is connected to the rear flange by spline connection.

Images