CN110723211A - Adjusting device and angle adjusting method for inner inclination angle and back inclination angle of main pin of double-cross-arm suspension - Google Patents
Adjusting device and angle adjusting method for inner inclination angle and back inclination angle of main pin of double-cross-arm suspension Download PDFInfo
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- CN110723211A CN110723211A CN201910840245.8A CN201910840245A CN110723211A CN 110723211 A CN110723211 A CN 110723211A CN 201910840245 A CN201910840245 A CN 201910840245A CN 110723211 A CN110723211 A CN 110723211A
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- inclination angle
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- caster
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D17/00—Means on vehicles for adjusting camber, castor, or toe-in
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Abstract
The invention discloses a device and a method for adjusting the inclination angle of a king pin and the inclination angle of a king pin of a double-cross-arm suspension, which relate to the field of suspensions and comprise an upper cross arm and a lower cross arm, wherein a hydraulic system is arranged on the upper cross arm, the hydraulic system comprises a piston, a piston stop plate and a hydraulic oil cylinder cavity, the piston stop plate is fixedly arranged on the upper cross arm, one end of the piston can reciprocate in the hydraulic oil cylinder cavity, and the other end of the piston is movably connected with one end of a U-shaped structure; the other end of the U-shaped structure is connected with a knuckle pin shaft, one end of the lower cross arm is connected with the knuckle pin shaft, and the other end of the lower cross arm is connected with the frame through a screw transmission mechanism. The invention realizes the correction and adjustment of the change of the caster angle of the kingpin and the caster angle of the kingpin of the double-wishbone suspension, and solves the problems of the correction of the error of two positioning parameters of a vehicle under long-time running abrasion and the different requirements of the caster angle under various working conditions.
Description
Technical Field
The invention relates to the field of automobile suspensions, in particular to a device and a method for adjusting the inclination angle of a king pin and the caster angle of a king pin of a double-wishbone suspension.
Background
The caster angle of the kingpin and the caster angle of the kingpin are important parameters in the positioning parameters of the front wheels of the vehicle, and the caster angle of the kingpin, namely the projection acute angle of the virtual kingpin axis (or the connecting line of the centers of the upper swing arm ball pin and the lower swing arm ball pin of the independent suspension) and the plumb line on the plane vertical to the longitudinal symmetry plane of the vehicle is an important parameter influencing the automatic alignment of the wheels during the low-speed running of the vehicle and ensuring the straight running of the vehicle. The caster angle of the main pin in the existing independent suspension is generally not adjustable, and if the caster angle error is too large, the knuckle needs to be replaced, so that the suspension is time-consuming, labor-consuming and extremely inconvenient. Therefore, when the vehicle is designed and loaded for use, the parameters of the inclination angle of the vehicle cannot be controlled within a reasonable range, and the return performance and the steering force characteristic of the vehicle are influenced. In the daily running process of the vehicle, the maintenance and the repair of structural parts are indispensable, and due to the aging and the abrasion of materials, the size of a kingpin caster angle can exceed an allowable error range, so that the safe running of the vehicle is seriously influenced; the existing Macpherson independent suspension can guarantee the caster angle of a kingpin by adjusting the axial direction of a spring sliding column, and the existing double-wishbone suspension cannot realize the adjustment of the caster angle of the kingpin.
Disclosure of Invention
In order to make up for the deficiency of the existing double-wishbone suspension, the invention provides a structure capable of adjusting two positioning parameters of a kingpin inclination angle and a kingpin caster angle of the double-wishbone suspension, in particular to a structure capable of adjusting the kingpin inclination angle and the caster angle, a suspension using the structure and an angle adjusting method, wherein the device and the method can control the kingpin inclination angle within a range of an expected value and change according to the relation of the kingpin inclination angle and can correspondingly correct the change of the kingpin caster angle; meanwhile, the condition that the errors of the inner inclination angle of the kingpin and the caster angle of the kingpin are too large after long-time abrasion is avoided, so that the two positioning parameters can be adjusted.
A double-cross-arm structure capable of adjusting an inward inclination angle comprises an upper cross arm and a lower cross arm, wherein a hydraulic system is arranged on the upper cross arm and comprises a piston, a piston blocking plate and a hydraulic cylinder cavity, the piston blocking plate is fixedly arranged on the upper cross arm, one end of the piston can reciprocate in the hydraulic cylinder cavity, and the other end of the piston is movably connected with one end of a U-shaped structure; the other end of the U-shaped structure is connected with a knuckle pin shaft, and the lower cross arm is connected with the knuckle pin shaft.
Furthermore, a piston hole is formed in the upper cross arm, and the other end of the piston penetrates through the piston hole to be connected with the U-shaped structure.
Furthermore, the hydraulic oil cylinder chamber comprises an oil cylinder oil inlet and an oil cylinder oil outlet.
Furthermore, the hydraulic oil cylinder chamber is arranged in the built-in oil cylinder, and the built-in oil cylinder is fixedly arranged on the piston blocking plate.
Further, the steering knuckle is a T-shaped steering knuckle.
Furthermore, the other end of the lower cross arm is connected with the frame through a screw mechanism, the screw mechanism comprises a telescopic arm and a steel bushing, the telescopic arm converts spiral motion into linear motion of the steel bushing under the driving of a servo motor, the lower cross arm is clamped with the steel bushing, the steel bushing drives the lower cross arm to move, and therefore the caster angle of the kingpin is adjusted.
The angle adjusting method of the double-cross arm structure based on the adjustable inner inclination comprises an inner inclination angle adjusting mode and a back inclination angle adjusting mode;
the inner inclination angle adjusting mode comprises the following steps: and if the actually measured inner inclination angle is increased, the control unit performs analysis processing to convert the signal into an extension control action on the piston so as to enable the inner inclination angle value to reach the expected value, and the piston extends to achieve the purpose of adjusting the telescopic arm, so that the inner inclination angle is adjusted.
Caster angle adjustment mode: the value measured by the acceleration sensor is converted to obtain the magnitude of the caster angle of the kingpin, and the magnitude of the caster angle of the kingpin is compared with an expected value, if deviation exists, the control unit can realize that the servo motor rotates to drive the screw transmission mechanism to move so as to realize the contraction of the telescopic arm and further realize the movement of the lower cross arm in the advancing direction of the vehicle, so that the caster angle of the kingpin is adjusted.
The beneficial technical effects of the invention are embodied in the following aspects:
1. the invention can correspondingly contract the U-shaped structure by driving the piston by the hydraulic cylinder, so that the range of the inner inclination angle of the kingpin can be in a reasonable interval, different requirements on the inner inclination angle under different working conditions are met, and the condition of over-heavy steering is avoided.
2. The invention realizes the contraction movement of the screw transmission mechanism through the rotation of the servo motor, indirectly pushes the lower cross arm to move in the advancing direction of the vehicle, realizes the adjustment of the caster angle of the kingpin, avoids the phenomena of weakened automatic aligning capability of a steering wheel and the like after steering, and can simultaneously keep the stability of the linear running of the automobile.
3. The actuating mechanism is relatively simple in arrangement and low in cost, and can be popularized and applied to similar structures.
4. The invention can avoid causing the change of the camber angle of the wheel, thereby influencing the abrasion of the tire.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a camber angle adjustment mechanism;
FIG. 3 is a schematic structural view of an oil cylinder and a piston of the inner inclination angle adjusting mechanism;
FIG. 4 is a schematic view of a kingpin caster adjustment mechanism.
The reference numbers are as follows:
1-upper cross arm, 2-U-shaped structure, 3-knuckle, 4-lower cross arm, 5-built-in oil cylinder, 6-piston, 7-piston stop block, 8-hydraulic oil cylinder chamber, 9-oil cylinder oil inlet, 10-oil cylinder oil outlet, 11-frame, 12-servo motor, 13-screw hole, 14-steel bushing, 15-telescopic arm and 16-nut.
Detailed Description
The invention will now be further described by way of example with reference to the accompanying drawings.
Referring to fig. 1, a schematic view of a suspension to which the adjustment mechanism is applied is shown. The double-wishbone suspension structure comprises an upper wishbone 1, a U-shaped structure 2, a steering knuckle 3, a lower wishbone 4, a built-in hydraulic cylinder telescopic arm 5 and the like. One end of the U-shaped structure 2 is connected with the upper end of the steering knuckle 3 through a T-shaped knuckle structure, and the other end of the U-shaped structure penetrates through a round hole in the middle of the upper cross arm to be connected with a piston; the upper and lower swing arms are connected to the frame by a movable pin.
Referring to fig. 2, the U-shaped structure acts on the hydraulic oil cylinder 5 through the control force distributed by the control unit to push the piston to extend and shorten, and the inclination angle changes continuously until the piston 6 moves left and right until the expected proper angle is reached, so that the problem of inclination angle error adjustment due to long-time abrasion is solved.
Referring to fig. 3, which is a schematic view of a partial section of a piston of the oil cylinder, the pressure in the chamber is increased through an oil inlet 9 to extend the piston; similarly, the piston is contracted by releasing the pressure in the chamber through the oil outlet 10. The oil inlet and the oil outlet are respectively provided with a one-way valve, so that oil can only flow in a one-way manner to realize pressure difference in the oil chamber.
Referring to fig. 4, a caster adjustment apparatus is shown, wherein 11 is a frame portion, where only one mounting hole is shown; the measured value of the sensor is compared with an expected value, the extension arm 15 installed in the screw hole 13 of the screw rod mechanism is driven to move through the rotation of the servo motor 12, the rotation generated by the servo motor 12 is converted into the rotation of the extension arm 15, so that the linear motion of the steel sleeve 14 is realized, the steel sleeve 14 is connected with the lower cross arm 4 in a clamping mode, the steel sleeve 14 drives the lower cross arm 4 to move, the back inclination angle of the main pin is adjusted, the movement of the lower cross arm in the advancing direction is realized, the relative position of the lower cross arm is changed, and the back inclination angle of the main pin is adjusted.
When the automobile normally runs, the caster angle of the kingpin and the caster angle of the kingpin can be controlled in real time, the effect of keeping the expected values of two angles is achieved, and the current situation that the positioning parameters of the conventional suspension are not adjustable is changed.
A double-cross-arm structure capable of adjusting an inclination angle comprises an upper cross arm 1 and a lower cross arm 4, wherein a hydraulic system is arranged on the upper cross arm 1 and comprises a piston 6, a piston blocking plate 7 and a hydraulic cylinder cavity 8, the piston blocking plate 7 is fixedly arranged on the upper cross arm 1, one end of the piston 6 can reciprocate in the hydraulic cylinder cavity 8, and the other end of the piston 6 is movably connected with one end of a U-shaped structure 2; the other end of the U-shaped structure 2 is connected with a steering knuckle 3 through a pin shaft, and the lower cross arm 4 is connected with the steering knuckle 3 through a pin shaft.
The upper cross arm 1 is provided with a piston hole, and the other end of the piston 6 penetrates through the piston hole to be connected with the U-shaped structure 2. The hydraulic oil cylinder chamber 8 comprises an oil cylinder oil inlet 9 and an oil cylinder oil outlet 10. The hydraulic oil cylinder chamber 8 is arranged in the built-in oil cylinder 5, and the built-in oil cylinder 5 is fixedly arranged on the piston blocking plate 7. The steering knuckle 3 is a T-shaped steering knuckle.
The angle adjusting method of the double-cross arm structure based on the adjustable inner inclination comprises an inner inclination angle adjusting mode and a back inclination angle adjusting mode;
the inner inclination angle adjusting mode comprises the following steps: and comparing the internal inclination angle value obtained by calculation through the information obtained by the acceleration sensor with the expected internal inclination angle, if the actually measured internal inclination angle is increased, analyzing and processing the signal through the control unit to convert the signal into an extension control action on the piston so as to enable the internal inclination angle value to reach the expected value, and extending the piston 6 to achieve the purpose of adjusting the telescopic arm 15 so as to adjust the internal inclination angle.
Caster angle adjustment mode: the value of the caster angle of the kingpin obtained by converting the value measured by the acceleration sensor is compared with an expected value, if deviation exists, the servo motor 12 can rotate to drive the screw transmission mechanism to move through the control unit, so that the telescopic arm 15 is contracted to enable the lower cross arm 4 to move in the advancing direction of the vehicle, and then the caster angle of the kingpin is adjusted.
The sensors comprise a liquid flow sensor, a pressure sensor and an acceleration sensor, and the obtained signals are subjected to derivation operation to obtain a kingpin inclination angle and a kingpin caster angle, and the kingpin inclination angles and the kingpin caster angles are transmitted to respective control units to be compared with expected values; under the condition of error, the specific range of the error value is obtained by solving the signal of the acceleration sensor, then the pressure required by the distribution is calculated by the control unit and is output to the oil cylinder to act on the piston through the conversion of the flow sensor and the pressure sensor, and the extension and the shortening of the telescopic arm are realized; the calculated result is converted into the number of turns of the motor to realize the movement of the screw transmission mechanism so as to drive the lower cross arm to move, and the size of the caster angle of the kingpin is indirectly adjusted.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. The adjusting device for the inner inclination angle and the back inclination angle of the king pin of the double-cross-arm suspension comprises an upper cross arm (1) and a lower cross arm (4), and is characterized in that a hydraulic system is arranged on the upper cross arm (1), the hydraulic system comprises a piston (6), a piston blocking plate (7) and a hydraulic cylinder chamber (8), the piston blocking plate (7) is fixedly arranged on the upper cross arm (1), one end of the piston (6) can reciprocate in the hydraulic cylinder chamber (8), and the other end of the piston (6) is movably connected with one end of a U-shaped structure (2); the other end of the U-shaped structure (2) is connected with the steering knuckle (3) through a pin shaft, and one end of the lower cross arm (4) is connected with the steering knuckle (3) through a pin shaft.
2. The device for adjusting the caster angle and the caster angle of a king pin of a double-wishbone suspension according to claim 1, characterized in that the other end of the lower wishbone (4) is connected to the frame (11) through a screw mechanism, the screw mechanism comprises a telescopic arm (15) and a steel sleeve (14), the telescopic arm (15) is driven by a servo motor (12) to convert a spiral motion into a linear motion of the steel sleeve (14), the lower wishbone (4) is clamped with the steel sleeve (14), and the steel sleeve (14) moves to drive the lower wishbone (4) to move, so that the caster angle of the king pin is adjusted.
3. The device for adjusting the caster angle and the caster angle of a king pin of a double-wishbone suspension according to claim 1, characterized in that the upper wishbone (1) is provided with a piston bore through which the other end of the piston (6) is connected to the U-shaped structure (2).
4. The double wishbone suspension king pin inclination and king pin caster adjustment arrangement according to claim 1, characterized in that the hydraulic cylinder chamber (8) comprises a cylinder oil inlet (9) and a cylinder oil outlet (10).
5. The device for adjusting the caster angle and caster angle of a king pin of a double wishbone suspension according to claim 4, characterized in that the hydraulic cylinder chamber (8) is disposed within the built-in cylinder (5), the built-in cylinder (5) being fixedly disposed on the piston stopper plate (7).
6. Device for the adjustment of the castor and caster of a double wishbone suspension according to claim 1, characterised in that said knuckle (3) is a T-knuckle.
7. The angle adjusting method of the adjusting device for the inner inclination angle and the back inclination angle of the kingpin of the double-wishbone suspension is characterized by comprising an inner inclination angle adjusting mode and a back inclination angle adjusting mode;
the inner inclination angle adjusting mode comprises the following steps: the inner inclination angle value calculated by the information obtained by the acceleration sensor is compared with the expected inner inclination angle, if the actually measured inner inclination angle is increased, the control unit analyzes and processes the signals and converts the signals into an extension control action on the piston so as to enable the inner inclination angle value to reach the expected value, and the piston (6) is extended so as to adjust the inner inclination angle;
caster angle adjustment mode: the value measured by the acceleration sensor is converted to obtain the magnitude of the caster angle of the kingpin, the magnitude of the caster angle of the kingpin is compared with an expected value, if deviation exists, the servo motor (12) can rotate to drive the screw transmission mechanism to move through the control unit, the telescopic arm (15) is contracted, and the lower cross arm (4) moves in the advancing direction of a vehicle, so that the caster angle of the kingpin is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910840245.8A CN110723211A (en) | 2019-09-06 | 2019-09-06 | Adjusting device and angle adjusting method for inner inclination angle and back inclination angle of main pin of double-cross-arm suspension |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910840245.8A CN110723211A (en) | 2019-09-06 | 2019-09-06 | Adjusting device and angle adjusting method for inner inclination angle and back inclination angle of main pin of double-cross-arm suspension |
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| Publication Number | Publication Date |
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| CN110723211A true CN110723211A (en) | 2020-01-24 |
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| CN201910840245.8A Pending CN110723211A (en) | 2019-09-06 | 2019-09-06 | Adjusting device and angle adjusting method for inner inclination angle and back inclination angle of main pin of double-cross-arm suspension |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238899A (en) * | 2020-10-16 | 2021-01-19 | 中国北方车辆研究所 | Mechanism for adjusting caster angle of main pin of single-trailing-arm independent suspension |
| CN113734284A (en) * | 2021-08-31 | 2021-12-03 | 东风汽车集团股份有限公司 | Steering hand force adjustable mechanism and adjusting method |
| CN114111529A (en) * | 2021-11-10 | 2022-03-01 | 东风汽车集团股份有限公司 | Method and device for measuring caster angle and inner tilt angle of vehicle kingpin |
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| CN113734284A (en) * | 2021-08-31 | 2021-12-03 | 东风汽车集团股份有限公司 | Steering hand force adjustable mechanism and adjusting method |
| CN114111529A (en) * | 2021-11-10 | 2022-03-01 | 东风汽车集团股份有限公司 | Method and device for measuring caster angle and inner tilt angle of vehicle kingpin |
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Application publication date: 20200124 |