CN111439298B - Steering mechanism gap adjusting device and method based on giant magnetostriction - Google Patents
Steering mechanism gap adjusting device and method based on giant magnetostriction Download PDFInfo
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- CN111439298B CN111439298B CN202010254796.9A CN202010254796A CN111439298B CN 111439298 B CN111439298 B CN 111439298B CN 202010254796 A CN202010254796 A CN 202010254796A CN 111439298 B CN111439298 B CN 111439298B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000036316 preload Effects 0.000 claims abstract description 41
- 238000007789 sealing Methods 0.000 claims description 10
- 230000005389 magnetism Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims 4
- 239000000463 material Substances 0.000 abstract description 7
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000000806 elastomer Substances 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- -1 Polytetrafluoroethylene Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/12—Steering gears mechanical of rack-and-pinion type
- B62D3/123—Steering gears mechanical of rack-and-pinion type characterised by pressure yokes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/26—Racks
- F16H55/28—Special devices for taking up backlash
- F16H55/283—Special devices for taking up backlash using pressure yokes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Gears, Cams (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention discloses a steering mechanism gap adjusting device based on giant magnetostriction and a method thereof. According to the invention, the current introduced into the exciting coil is changed according to the vibration conditions of the road surface and the vehicle body, so that the magnetic field intensity is changed, and the characteristics of different elongation lengths of the giant magnetostrictive material under different magnetic fields are utilized, so that the real-time adjustment of the preload of the elastomer and the clearance between the gear and the rack is realized.
Description
Technical Field
The invention belongs to the technical field of automobile parts, and particularly relates to a steering mechanism.
Background
The steering gear is a speed reduction transmission device in a steering system and is generally provided with a 1-2-level speed reduction transmission pair; according to different structural forms of the transmission pair, the steering gear can be divided into a plurality of types, and a plurality of types of gear rack type, circulating ball-rack sector type, circulating ball-crank finger type and the like are widely adopted on automobiles at present. Among them, rack and pinion type steering gears are the most common type of steering gears; in a rack-and-pinion steering gear, a steering gear as a drive-side drive member is mounted in a housing and engages a horizontally disposed steering rack. The spring presses the rack against the steering gear through the pressing block so as to ensure gapless engagement. When the steering rack works, the middle part of the steering rack is connected with the steering rod bracket, and the left and right steering tie rods are connected with the steering knuckle arms. When the steering wheel is rotated, the steering gear is transferred, so that the steering rack meshed with the steering gear is axially moved, and the left and right tie rods drive the large left and right steering knuckles to transfer, so that the steering wheel is deflected, and the steering of the automobile is realized.
The gap eliminating device adopted by the existing gear-rack steering gear is mainly used for eliminating the gap generated after the gears and racks are worn, and the basic principle is that the racks are pressed by the pre-load force of springs, so that the constant gap between the gears and the racks is ensured. The spring pressing device effectively solves the problem that the gap is increased after the gear rack is worn; however, the road surface condition of the vehicle is complex when the vehicle actually runs, but the pre-load force of the spring generated by the current anti-backlash mechanism cannot be adjusted in real time in the running process of the vehicle, and the larger pre-load force accelerates the abrasion of a steering system and causes heavy steering; the small preload force in turn causes abnormal sound problems when the vehicle is traveling on rough roads. With the rise of the noise control requirements of vehicles, current steering mechanism lash adjustment devices have failed to meet the needs.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steering mechanism clearance adjusting device based on giant magnetostriction, which can effectively compensate the clearance caused by normal working abrasion of a gear and a rack and simultaneously can adjust the preload in real time in the running process of a vehicle.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a steering mechanism clearance adjusting device based on giant magnetostrictive, includes steering gear casing, rack and pinion subassembly and support yoke, the rack that rack and pinion engaged is included to the rack and pinion subassembly, the steering gear casing is equipped with the clearance adjustment chamber that corresponds with the rack, support yoke movable mounting is in the clearance adjustment chamber and support the rack back, steering mechanism clearance adjusting device still includes magnetostrictive actuator assembly and elasticity preload assembly, magnetostrictive actuator assembly includes the exciter casing, is located the exciting coil of exciter casing, endotheca in the magnetostriction stick of exciting coil, magnetostrictive rod's upper end and support yoke butt, lower extreme and exciter casing bottom butt, the adjusting screw stopper is installed to the lower extreme in clearance adjustment chamber, elasticity preload assembly's upper end and exciter casing butt, lower extreme and adjusting screw stopper butt, elasticity preload assembly exerts the preload to magnetostrictive rod through the exciter casing.
Preferably, the support yoke is provided with an arc-shaped groove corresponding to the arc-shaped part on the back of the rack, and the surface of the arc-shaped groove is provided with an antifriction and cushioning layer.
Preferably, a supporting groove is formed in the lower portion of the supporting yoke, and the upper end of the magnetostrictive rod extends into the supporting groove and abuts against the top wall of the supporting groove.
Preferably, at least one sealing ring matched with the inner wall of the gap adjusting cavity is arranged on the outer cylindrical surface of the support yoke.
Preferably, the elastic preload assembly is a disc spring assembly.
Preferably, the disc spring assembly comprises two groups of disc springs, each group of disc springs consists of two disc springs which are overlapped and connected in parallel, and the two groups of disc springs are connected in a involution and serial connection mode.
Preferably, the magnetostrictive actuator assembly further comprises an actuator top cover closing the opening of the actuator housing and a coil former movably nested outside the magnetostrictive rod, wherein the excitation coil is wound on the coil former and is assembled inside the actuator housing and is pressed by the actuator top cover.
Preferably, a protruding column is arranged at the bottom of the exciter shell, the adjusting screw plug is provided with a sliding hole, the inner hole of the disc spring assembly is nested in the protruding column, and the protruding column slides and stretches into the sliding hole.
Preferably, at least one sealing ring is mounted on the outer cylindrical surface of the exciter housing.
The invention also provides a method for actively adjusting the gap of the steering mechanism based on the giant magnetostriction, which adopts the device for actively adjusting the gap of the steering mechanism based on the giant magnetostriction and comprises the following steps:
1) When the vehicle runs on a bumpy road surface, current is introduced into the exciting coil;
2) The current introduced by the exciting coil generates a magnetic field at the axial position of the exciter assembly;
3) The magnetostrictive rod is magnetostrictive under the action of a magnetic field, and the length is increased;
4) The elongated magnetostrictive rod presses the elastic preload assembly through the actuator casing, the elastic preload assembly deforms more and generates a greater preload force;
5) The increased preload force of the elastic preload assembly is transmitted through the actuator assembly and the support yoke, thereby further compressing the rack and reducing the gap between the rack and the gear;
6) According to the road surface and the vehicle body vibration condition, changing the current magnitude introduced into the exciting coil, and further realizing the real-time adjustment of the preload magnitude of the elastic preload component and the clearance between the gear and the rack;
7) And (2) after the vehicle drives away from the bumpy road surface, current in the opposite direction to the direction of the step (1) is introduced into the exciting coil so as to eliminate residual magnetism in the magnetostrictive rod, and the magnetostrictive rod is enabled to recover to the initial length.
The technical scheme adopted by the invention has the following beneficial effects:
the magnetostrictive rod is magnetostrictive, the length is increased, the elastic preloading component is extruded through the exciter shell, the deformation of the elastic preloading component is increased, and larger preloading force is generated, the increased preloading force of the elastic preloading component is transmitted through the exciter assembly and the support yoke, so that the rack is further compressed, the gap between the rack and the gear is reduced, and the gap caused by normal working abrasion of the gear and the rack can be effectively compensated.
The steering hand feeling of a driver can be changed due to overlarge preload, and abnormal sound can not be avoided due to overlarge preload, so that the current introduced into an exciting coil is changed according to the vibration conditions of a road surface and a vehicle body, the magnetic field strength is changed, the characteristics of different extension lengths of a giant magnetostrictive material under different magnetic fields are utilized, the real-time adjustment of the preload of an elastomer and a gear rack clearance is realized, the steering flexibility of the vehicle when the vehicle runs on a well paved road surface is ensured, and the abnormal sound problem of a steering mechanism on a bumpy road surface is avoided.
The disc spring group is formed by combining two groups of disc springs which are overlapped and connected in parallel, the contact surfaces between the disc springs generate relative displacement and rub each other, and energy is dissipated through friction damping, so that vibration is damped.
Because the first sealing ring of the support yoke and the second sealing ring of the support yoke, and the first sealing ring of the exciter and the second sealing ring of the exciter are tightly mounted, friction force opposite to the movement direction of the support yoke is generated, energy is dissipated through friction damping, and vibration is damped.
The specific technical scheme and the beneficial effects of the invention are described in detail in the following detailed description with reference to the accompanying drawings.
Drawings
The invention is further described with reference to the drawings and detailed description which follow:
FIG. 1 is a schematic diagram of a gap adjusting device of a steering mechanism based on giant magnetostriction;
FIG. 2 is a schematic structural view of a support yoke assembly;
FIG. 3 is a schematic structural view of an actuator assembly.
In the figure: the steering gear comprises a steering gear housing 1, a gear shaft 2, a rack 3, a support yoke assembly 4, a magnetostrictive actuator assembly 5, a connector 6, a fixing nut 7, an adjusting screw plug 8, a disc spring assembly 9, a first support bearing 10, a second support bearing 11, a support yoke 401, an antifriction and cushioning layer 402, an air vent 403, a support groove 404, a support yoke first seal ring 405, a support yoke second seal ring 406, an actuator top cover 501, an actuator housing 502, a boss 5021, a positioning groove 5022, an actuator coil 503, a coil bobbin 504, a wire outlet 505, a magnetostrictive rod 506, an actuator first seal ring 507, and an actuator second seal ring 508.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper", "lower", etc., indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of description, and do not indicate or imply that the devices/elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus are not to be construed as limiting the invention.
Those skilled in the art will appreciate that the features of the examples and embodiments described below can be combined with one another without conflict.
Example 1
Referring to fig. 1 to 3, the giant magnetostrictive steering mechanism gap adjusting device comprises a steering gear housing 1, a gear shaft 2, a rack 3, a support yoke assembly 4, a magnetostrictive actuator assembly 5, a connector 6, a fixing nut 7, an adjusting screw plug 8, a disc spring assembly 9, a first support bearing 10 and a second support bearing 11.
Wherein one end of the gear shaft 2 is connected with a first support bearing 10, the other end of the gear shaft 2 is connected with a second support bearing 11, and the gear shaft 2 is assembled in the horizontal cavity of the steering gear housing 1 through the first support bearing 10 and the second support bearing 11. In this embodiment, the gear shaft 2 is integrally formed with a gear, and it is understood that the gear shaft and the gear may be in a split structure.
One side of the rack 3 with teeth is meshed with a gear on the gear shaft 2, and the other side of the rack 3 is matched with the support yoke assembly 4. The steering gear shell 1 is correspondingly provided with a clearance adjusting cavity communicated with the horizontal cavity below the rack 3, the lower opening part of the clearance adjusting cavity is communicated with the bottom surface of the steering gear shell, and the support yoke assembly 4, the magnetostrictive actuator assembly 5, the disc spring assembly 9 and the adjusting screw plug 8 are sequentially assembled in the clearance adjusting cavity of the steering gear shell 1. The adjusting screw plug 8 is screwed on the lower opening part of the gap adjusting cavity, the adjusting screw plug 8 compresses the supporting yoke assembly 4 through the disc spring assembly 9 and the magnetostrictive actuator assembly 5, and the fixing nut 7 is screwed on the lower end of the steering gear housing 1 from the lower end screw part of the adjusting screw plug 10. The connector 6 passes through and is fixed in the side connector mounting hole of the steering gear housing 1, and is connected with a power supply through the connector 6.
The support yoke assembly 4 comprises a support yoke 401, an antifriction and cushioning layer 402, a support yoke first seal ring 405 and a support yoke second seal ring 406. Wherein, the support yoke 401 is provided with an arc groove corresponding to the arc part on the back of the rack, and the antifriction and cushioning layer 402 is coated on the surface of the arc groove and is abutted with the arc part on the back of the rack. The support yoke first sealing ring 405 and the support yoke second sealing ring 406 are sequentially assembled on the outer cylindrical surface of the support yoke 401, and the axis of the support yoke 401 is provided with an air hole 403 and a support groove 404, wherein the air hole 403 penetrates through the support yoke 401 and the antifriction and cushioning layer 402, and the support groove 404 is positioned on the contact side of the support yoke 401 and the exciter assembly 5 and is communicated with the air hole 403. The antifriction and cushioning layer 402 may be made of Polytetrafluoroethylene (PTFE) or other materials, or other prior art materials. In order to shake the magnetostrictive rod, the fit clearance between the magnetostrictive rod and the support yoke groove is designed to be very small, if no air holes are arranged, when the magnetostrictive rod is inserted into the support yoke groove, the magnetostrictive rod is possibly difficult to install due to internal pressure, and the air holes are arranged to avoid the problem.
Referring to fig. 1 and 3, magnetostrictive actuator assembly 5 includes an actuator overcap 501, an actuator housing 502, an actuator coil 503, a bobbin 504, a magnetostrictive rod 506, an actuator first seal 507, and an actuator second seal 508. Wherein, coil former 504 around which exciting coil 503 is wound is assembled inside exciter housing 502 and is pressed by exciter top cover 501, magnetostrictive rod 506 is located at the axis of exciter housing 502 and passes through coil former 504 and exciter top cover 501, exciter first seal ring 507 and exciter second seal ring 508 are assembled on the outer cylindrical surface of exciter housing 502 in order, exciter housing 502 lower end is also provided with wire hole 505 for passing through the wire of exciting coil 503, and the wire led out from wire hole 505 is connected with connector 6.
Because the support yoke first seal ring 405 and the support yoke second seal ring 406, and the actuator first seal ring 507 and the actuator second seal ring 508 are all tightly mounted, friction forces opposite to the movement direction of the support yoke 4 are generated, energy is dissipated by friction damping, and vibration is damped.
The disc spring assembly 9 comprises two groups of disc springs, each group of disc springs consists of two disc springs which are overlapped and connected in parallel, and the two groups of disc springs are connected in a involution and serial connection mode. The disc spring assembly 9 is formed by combining two groups of disc springs which are overlapped and connected in parallel, the contact surfaces between the disc springs generate relative displacement and rub each other, and energy is dissipated through friction damping to damp vibration.
Of course, those skilled in the art will appreciate that other springs or similar resilient members may be substituted for the resilient preload assembly as a variation of the disc spring assembly described above. In order to ensure the output characteristics of the giant magnetostrictive material, the spring should have a variable stiffness characteristic, and a section of the force-displacement curve of the spring is relatively gentle, so that a disc spring is preferably used, and the disc spring can save space.
In the above structure, the bottom of the exciter housing is provided with a protruding column 5021 protruding downwards, the upper surface of the bottom of the exciter housing is provided with a positioning groove 5022, the upper end of the magnetostrictive rod extends into the supporting groove 404 and abuts against the top wall of the supporting groove, and the lower end of the magnetostrictive rod abuts against the positioning groove 5022. The adjusting screw plug 8 is provided with a sliding hole, the inner hole of the disc spring assembly is nested in the convex column 5021, and the convex column 5021 slides and stretches into the sliding hole.
Example two
The active adjustment method of the steering mechanism gap based on giant magnetostriction comprises the following steps:
1) When the vehicle runs on bumpy roads such as non-paved roads, at the moment, the vibration transmitted to the steering mechanism is increased, in order to avoid abnormal noise of the steering system, the rack 3 needs to be pressed on the gear of the gear shaft 2 by larger preload, and current is firstly introduced into the exciting coil 503;
2) The current supplied by the exciting coil 503 generates a magnetic field at the axial position of the magnetostrictive actuator assembly 5;
3) Magnetostriction rod 506 positioned on the axis of magnetostriction exciter assembly 5 is magnetostricted under the action of a magnetic field, and the length of magnetostriction rod 506 is increased no matter the direction of the magnetic field positioned on the axis of magnetostriction exciter assembly 5 is positive or negative due to the characteristics of the giant magnetostrictive material, so that the magnetic field direction in step 1) is not required to be defined;
4) The elongated magnetostrictive rod 503 presses the disc spring assembly 9 via the actuator housing 502, the disc spring assembly 9 deforms more and generates a greater preload force;
5) The increased preload force of the disc spring assembly 9 is transmitted through the magnetostrictive actuator assembly 5 and the support yoke assembly 4, so that the rack 3 is further compressed, the gap between the rack 3 and the gear of the gear shaft 2 is reduced, and abnormal sound caused by collision of the steering system on a bumpy road surface due to the gap is avoided;
6) The steering hand feeling of a driver can be changed due to the overlarge preload, and the abnormal sound problem cannot be avoided due to the overlarge preload, so that the current introduced into the exciting coil 503 is changed according to the road surface and the vehicle body vibration condition, and the preload of the disc spring assembly 9 and the gap between the gear and the rack 3 on the gear shaft 2 are adjusted in real time;
7) Due to the characteristics of the giant magnetostrictive material, after the external magnetic field is removed, residual magnetism in the magnetostrictive rod 506 cannot retract to the original length, so that after a vehicle drives away from a bumpy road surface, current in the opposite direction to that in the step 1) is fed to the exciting coil 503 for a short time to eliminate the residual magnetism in the magnetostrictive rod 506, and the magnetostrictive rod 506 is enabled to recover to the original length.
In the step 1), two methods are used for detecting bumpy road surfaces such as non-paved road surfaces when the vehicle runs:
1) Directly detecting vibration of the whole vehicle: for a vehicle model equipped with an acceleration sensor, a whole vehicle controller VCU is required to transmit to a steering controller ECU through a CAN signal; if the whole vehicle does not transmit acceleration signals, an acceleration sensor can also be directly integrated on the steering controller. The basic principle of vibration monitoring is to detect acceleration, and when the root mean square/energy of the acceleration increases to a certain threshold value, the acceleration is considered to enter a bumpy road surface.
2) Detecting the reverse action of the steering system: when the vehicle runs to a bumpy road condition, the steering system inevitably generates a reverse action (transmitted to the driver to act as a beater), and the reverse action can be captured by torque and rotation angle sensors of the steering system; also, when the above-mentioned steering reaction caused by the road surface reaches a certain threshold value, the vehicle is considered to drive into a bumpy road surface.
The thresholds involved in the two methods are predetermined, and the acquisition of the thresholds is an constantly optimized calibration process, and the thresholds need to be determined according to a specific vehicle type test.
In step 6), the greater the intensity of vibration, the greater the current flowing in the excitation coil 503, and the tighter the rack pressure, before the maximum current limit is reached.
While the invention has been described in terms of specific embodiments, it will be appreciated by those skilled in the art that the invention is not limited to the specific embodiments described above. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (9)
1. Steering mechanism clearance adjustment device based on giant magnetostriction, including steering gear casing, rack and pinion subassembly and support yoke, the rack and pinion subassembly include the gear and with gear engagement's rack, the steering gear casing is equipped with the clearance adjustment chamber that corresponds with the rack, support yoke movable mounting is in the clearance adjustment chamber and support the rack back, its characterized in that: the steering mechanism gap adjusting device further comprises a magnetostrictive actuator assembly and an elastic preload assembly, wherein the magnetostrictive actuator assembly comprises an actuator shell, an actuator coil and a magnetostrictive rod, the actuator coil is positioned in the actuator shell, the magnetostrictive rod is sleeved in the actuator coil, the upper end of the magnetostrictive rod is in butt joint with the support yoke, the lower end of the magnetostrictive rod is in butt joint with the bottom of the actuator shell, an adjusting screw plug is arranged at the lower opening part of the gap adjusting cavity, the upper end of the elastic preload assembly is in butt joint with the actuator shell, the lower end of the elastic preload assembly is in butt joint with the adjusting screw plug, and the elastic preload assembly applies preload force to the magnetostrictive rod through the actuator shell;
the active adjustment of the steering mechanism clearance is carried out by adopting the steering mechanism clearance adjusting device based on giant magnetostriction, and the method comprises the following steps:
1) When the vehicle runs on a bumpy road surface, current is introduced into the exciting coil;
2) The current introduced by the exciting coil generates a magnetic field at the axial position of the exciter assembly;
3) The magnetostrictive rod is magnetostrictive under the action of a magnetic field, and the length is increased;
4) The elongated magnetostrictive rod presses the elastic preload assembly through the actuator casing, the elastic preload assembly deforms more and generates a greater preload force;
5) The increased preload force of the elastic preload assembly is transmitted through the actuator assembly and the support yoke, thereby further compressing the rack and reducing the gap between the rack and the gear;
6) According to the road surface and the vehicle body vibration condition, changing the current magnitude introduced into the exciting coil, and further realizing the real-time adjustment of the preload magnitude of the elastic preload component and the clearance between the gear and the rack;
7) And (2) after the vehicle drives away from the bumpy road surface, current in the opposite direction to the direction of the step (1) is introduced into the exciting coil so as to eliminate residual magnetism in the magnetostrictive rod, and the magnetostrictive rod is enabled to recover to the initial length.
2. The giant magnetostrictive steering mechanism lash adjustment device according to claim 1, characterized in that: the support yoke is provided with an arc-shaped groove corresponding to the arc-shaped part on the back of the rack, and the surface of the arc-shaped groove is provided with an antifriction and cushioning layer.
3. The giant magnetostrictive steering mechanism lash adjustment device according to claim 2, characterized in that: the lower part of the support yoke is provided with a support groove, and the upper end of the magnetostrictive rod stretches into the support groove and props against the top wall of the support groove.
4. The giant magnetostrictive steering mechanism lash adjustment device according to claim 1, characterized in that: and at least one sealing ring matched with the inner wall of the gap adjusting cavity is arranged on the outer cylindrical surface of the support yoke.
5. The giant magnetostrictive based steering mechanism lash adjustment device according to any one of claims 1 to 4, characterized in that: the elastic preload assembly is a disc spring assembly.
6. The giant magnetostrictive based steering mechanism lash adjustment device according to claim 5, characterized in that: the disc spring assembly comprises two groups of disc springs, each group of disc springs consists of two disc springs which are overlapped and connected in parallel, and the two groups of disc springs are connected in a involution and serial connection mode.
7. The giant magnetostrictive based steering mechanism lash adjustment device of claim 6, wherein: the magnetostrictive actuator assembly further comprises an actuator top cover for closing the opening of the actuator shell and a coil framework movably nested outside the magnetostrictive rod, wherein the actuating coil is wound on the coil framework and is assembled inside the actuator shell and is pressed by the actuator top cover.
8. The giant magnetostrictive based steering mechanism lash adjustment device of claim 7, wherein: the bottom of the exciter shell is provided with a convex column, the adjusting screw plug is provided with a sliding hole, the inner hole of the disc spring assembly is nested in the convex column, and the convex column slides and stretches into the sliding hole.
9. The giant magnetostrictive based steering mechanism lash adjustment device of claim 7, wherein: at least one sealing ring is arranged on the outer cylindrical surface of the exciter shell.
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| CN202010254796.9A CN111439298B (en) | 2020-04-02 | 2020-04-02 | Steering mechanism gap adjusting device and method based on giant magnetostriction |
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| CN202010254796.9A CN111439298B (en) | 2020-04-02 | 2020-04-02 | Steering mechanism gap adjusting device and method based on giant magnetostriction |
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| CN111439298B true CN111439298B (en) | 2023-09-12 |
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| CN111874098B (en) * | 2020-07-30 | 2021-11-23 | 北京汽车股份有限公司 | Steering gear, control method and device thereof and vehicle |
| CN112791916A (en) * | 2021-03-02 | 2021-05-14 | 南京怀蕊商贸有限公司 | Computer motherboard automatically regulated even quantitative adhesive deposite device |
| CN113184045B (en) * | 2021-06-08 | 2022-10-21 | 衢州职业技术学院 | Electric power steering system and clearance adjusting method thereof |
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| KR20070093591A (en) * | 2006-03-14 | 2007-09-19 | 기아자동차주식회사 | Support york control device of car steering system |
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| CN103832466A (en) * | 2014-03-17 | 2014-06-04 | 安徽江淮汽车股份有限公司 | Mechanical automobile steering device preventing abnormal sounds |
| CN106741128A (en) * | 2017-01-04 | 2017-05-31 | 北京长安汽车工程技术研究有限责任公司 | A kind of steering gear Mesh Clearance Adjustment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2684770B1 (en) * | 2012-07-13 | 2015-10-14 | TRW Automotive GmbH | Apparatus for pressing a rack against a pinion of a steering gear assembly |
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Address after: 311258 No. 28, Xiangshan Road, Wenyan street, Xiaoshan District, Hangzhou City, Zhejiang Province Applicant after: ZHEJIANG WANDA STEERING GEAR Co.,Ltd. Address before: No.28 Xiangshan Road, Wenyan Town, Xiaoshan District, Hangzhou City, Zhejiang Province Applicant before: ZHEJIANG WANDA STEERING GEAR CO.,LTD. |
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