CN118144865A - Crank finger type electric recirculating ball steering gear - Google Patents
Crank finger type electric recirculating ball steering gear Download PDFInfo
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- CN118144865A CN118144865A CN202410295549.1A CN202410295549A CN118144865A CN 118144865 A CN118144865 A CN 118144865A CN 202410295549 A CN202410295549 A CN 202410295549A CN 118144865 A CN118144865 A CN 118144865A
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- 230000003134 recirculating effect Effects 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000035939 shock Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000012208 gear oil Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Power Steering Mechanism (AREA)
Abstract
The invention discloses a crank finger type electric recirculating ball steering gear, which adopts motor power to replace traditional hydraulic power to realize steering function, the output torque of a motor is transmitted by a worm gear and worm, a ball screw is transmitted by a pair, and a crank slider is transmitted by a pair to perform two times of speed reduction and torque increase so as to achieve the power assisting effect of the traditional recirculating ball power steering gear for a light truck commercial vehicle.
Description
Technical Field
The invention relates to a crank finger type electric recirculating ball steering gear structure, which belongs to the field of automobile steering gears.
Background
In recent years, with the rapid development of the automobile industry in China and the rapid popularization of electric automobiles, the automobile end user has higher requirements on the driving comfort of the whole automobile at present, especially the requirements on the electric and intelligent operation of the commercial automobile, the requirements on the parts and suppliers of the traditional commercial automobile are new challenges, the traditional commercial automobile generally adopts a power steering system to carry out steering operation, the power steering system is a device for assisting a driver in steering operation by providing power for a steering oil pump through an engine, the device converts the energy of the engine into hydraulic energy and then converts the hydraulic energy into mechanical energy to act on steering wheels to assist the driver in steering, so the automobile is called a power steering system, the engine for providing power for the steering system always works after the traditional commercial automobile is started, therefore, the great waste of energy is caused, the commercial automobile in the market has wider application, if a special speed ratio cutter or a special gear ratio is required to be developed for realizing the steering function through a steering nut and a rocker arm shaft, the work piece detection is large, and the problems of the special speed ratio cutter or the special gear are solved based on the high-speed ratio crank processing, the intelligent steering ball steering device is realized, and the intelligent processing cost is low, and the like.
Disclosure of Invention
The invention mainly solves the technical problems existing in the prior art, thereby providing the crank finger type electric circulating ball steering gear which has simple structure, reduces the parts of the whole car, is convenient to install and debug and greatly reduces the fuel consumption.
The technical problems of the invention are mainly solved by the following technical proposal:
The crank finger-type electric circulation ball steering gear comprises a steering screw, a steering screw raceway outer circle is smaller than a steering nut raceway inner hole, the steering screw passes through the steering nut to assemble an inner circulation raceway and an outer circulation raceway through a steel ball and a guide pipe to form a ball screw transmission pair, the guide pipe clamp presses the guide pipe firmly, a screw and a gasket fix the guide pipe clamp, two ends of the steering screw are provided with thrust angular contact ball bearings which are symmetrically distributed with the central line of a rocker shaft and the plane perpendicular to the axis of the steering screw, the steering screw is axially and radially limited by applying a certain pretightening force through the threaded connection of an adjusting screw plug and a shell, the adjusting screw plug is locked and loose-proof through the adjusting screw plug and the worm gear inner hole through interference fit, a non-contact torque and angle sensor is arranged on the steering screw shaft, the steering screw inner hole and the torsion bar outer circle form rigid connection through interference fit, the torsion bar passes through the input shaft inner hole to keep the proper axial distance between the input shaft and the steering screw and is fixed together after mechanical centering, the input shaft outer circle passes through the magnetic ring inner hole and is rigidly connected through cylindrical pins, the magnetic ring is rigidly connected with the input shaft through welding after electric centering, the sensor wire harness passes through the wire harness hole of the box body to be connected with the sensor and fixed on the box body, the right side of the box body is fixed with the shell through bolt connection, the left side of the box body is fixed with the upper cover through bolt connection, the input shaft outer circle passes through the upper cover inner hole, the worm wheel hole of the box body is provided with a worm, two ends of the worm are provided with two deep groove ball bearings to support, the end of the worm motor is provided with a coupler, the motor is flexibly connected with the motor coupler through a shock pad, the motor is fixed with the box body through bolt connection, the controller is arranged at the tail part of the motor, and the other end of the sensor wire harness coming out of the box body is inserted into a sensor connector interface of the controller.
Further, the inner and outer circulating roller paths need to be subjected to heat treatment and post-heat fine grinding to ensure the wear resistance after bearing and the smoothness of the transmission moment.
Further, the worm wheel has the capability of bearing a large load, self-lubricating, wear-resisting and shock-absorbing.
Further, the sensor is rigidly connected to the steering screw by welding.
Further, the magnet ring needs to be kept at a proper distance from the sensor mounting axis.
Further, a rocker shaft is arranged in the inner cavity of the shell, the rocker shaft is pressed into the deep groove ball bearing in an interference manner to form rigid connection, then the finger is pressed into the rocker shaft in an interference manner, a mounting hole is formed in the side face of the rocker shaft, the adjusting bolt and the spring are locked into the mounting hole by the locking nut, and the adjusting bolt is screwed to press the spring to the limit position when the assembly is assembled, so that the finger and the steering nut are in gapless rolling fit with the tapered rollaway nest on the side edge.
The crank finger type electric recirculating ball steering gear has the beneficial effects that: because the crank finger type electric circulating ball steering gear takes the motor as power, the motor is started only when needed, the motor is independent of the engine, the fuel oil of the engine is hardly consumed directly, meanwhile, the high-pressure hydraulic oil is not arranged in the steering gear, and only the heavy-load gear oil with lubrication and cooling functions is used, so that the possibility of oil leakage is greatly reduced, and the economical efficiency and the environmental protection performance of an automobile are improved; the motor power assisting is adjusted by collecting the vehicle speed and steering wheel torque signals through the controller, so that the driving comfort function of light low-speed steering and stable high-speed steering can be realized; the controller can also collect real-time rotation angles of the steering wheel through the torque and angle sensor, and the motor can be controlled to realize active alignment, so that the stability and the comfort of automobile operation are improved; the gear and rack transmission pair is changed into a crank slide block mechanism, gear processing equipment is not needed, parts can be processed by a numerical control lathe, a numerical control processing center and a cylindrical grinding machine, the scheme can be realized without new equipment, and the parts processing difficulty and the workpiece cost can be reduced; hydraulic elements such as an oil pump, an oil pipe and an oilcan are omitted, the structure of parts is simple, the installation is convenient, and the weight of the steering gear is lighter compared with that of a traditional steering gear; when the steering nut drives the rocker shaft to rotate, the finger rolls up and down in the nut chute, and the crank changes along with the change of the output rotation angle to change the force moment for transmitting the axial force of the screw rod, so that the variable-ratio transmission function is obtained, and meanwhile, the steering nut cannot be subjected to radial force to cause the bending deformation of the steering screw rod to influence the ball screw transmission, so that the transmission efficiency is ensured; after the steering nut and the conical finger pin are worn for a long time to generate a gap, the gap between the rocker shaft and the adjusting bolt can be automatically eliminated under the action of the axial force of the spring, so that the idle stroke of the steering system can be reduced, and the running operation stability of the vehicle is improved; the finger pin and the rocker shaft are split, and are connected through the rolling bearing to form a fit, so that the finger pin and the rocker shaft can be made of different materials, different hardness and strength requirements are met, and the processing of parts is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a crank finger type electric recirculating ball steering gear of the present invention;
FIG. 2 is a top view of an inventive crank finger type electric recirculating ball steering gear;
FIG. 3 is a left side view of a crank finger type electric recirculating ball steering gear of the present invention;
In the figure: 1. a cylindrical pin; 2. a torsion bar; 3. an input shaft; 4. an upper cover; 5. a case; 6. a magnetic ring; 7. a sensor; 8. a worm wheel; 9. a locknut; 10. adjusting a screw plug; 11. a steel ball; 12. a steering nut; 13. a steering screw; 14. thrust angular contact ball bearings; 15. a housing; 16. a sensor harness; 17. a bolt; 18. a controller; 19. a motor; 20. a bolt; 21. a shock pad; 22. a coupling; 23. a bolt; 24. a worm; 25. deep groove ball bearings; 26. a gasket; 27. a screw; 28. a conduit clip; 29. a conduit; 30. a rocker shaft; 31. a finger; 32. deep groove ball bearings; 33. adjusting a bolt; 34. a lock nut; 35. and (3) a spring.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Referring to fig. 1 to 3, the present invention adopts the following technical scheme: a crank finger type electric circulation ball steering gear comprises a steering screw 13, an outer circle of a rolling way of the steering screw 13 is smaller than an inner hole of a rolling way of a steering nut 12, the steering screw 13 passes through the steering nut 12 to assemble an inner circulation rolling way and an outer circulation rolling way through a steel ball 11 and a guide pipe 29 to form a ball screw transmission pair, a guide pipe clamp 28 presses the guide pipe 29 firmly, a screw 27 and a gasket 26 fix the guide pipe clamp 28, two ends of the steering screw 13 are provided with thrust angular contact ball bearings 14, the two thrust angular contact ball bearings 14 are symmetrically distributed with a central line of a rocker shaft 30 and a plane perpendicular to the axis of the steering screw 13, the steering screw 13 is axially and radially limited by applying a certain pretightening force through the threaded connection of an adjusting screw plug 10 and a shell 15, a locknut 9 is further applied with a certain torque to lock the adjusting screw plug 10, the steering screw 13 passes through a hole of the adjusting screw plug 10 to form a rigid connection with an inner hole of a worm wheel 8 through interference fit, the steering screw 13 is provided with a non-contact torque & angle sensor 7 on the shaft, the inner hole of the steering screw 13 and the outer circle of the torsion bar 2 form rigid connection through interference fit, the torsion bar 2 passes through the inner hole of the input shaft 3 to keep the input shaft 3 and the steering screw 13 at proper axial distance and fix together after mechanical centering, the input shaft 3 passes through the inner hole of the magnetic ring 6 after electric centering and rigidly connects the magnetic ring 7 and the input shaft 3 through the cylindrical pin 1, the sensor wire harness 16 passes through the wire harness hole of the box 5 to connect with the sensor 7 and fix on the box 5, the right side of the box 5 is connected with the shell 15 through a bolt 23 to fix the left side of the box 5 and the upper cover 4 through a bolt 17 to connect, the outer circle of the input shaft 3 passes through the inner hole of the upper cover 4, the worm 24 is arranged in a hole of the worm wheel 8 of the box body 5, two deep groove ball bearings 25 are arranged at two ends of the worm 24 for supporting, a coupler 22 is arranged at the motor end of the worm 24, the coupler 22 is flexibly connected with the motor through a shock pad 21, the motor 19 is connected with the box body through a bolt 20 for fixing, the controller 18 is arranged at the tail of the motor 19, and the other end of a sensor harness 16 coming out of the box body 5 is inserted into a sensor connector interface of the controller 18.
The inner and outer circulating roller paths need to be subjected to heat treatment and fine grinding after heat treatment so as to ensure the wear resistance after bearing and the smoothness of the transmission moment.
The worm wheel 8 has the capability of bearing large load, self-lubrication, wear resistance and shock absorption.
The sensor 7 is rigidly connected to the steering screw 13 by welding.
The magnetic ring 6 is required to be kept at a proper distance from the mounting axis of the sensor 7.
The inner cavity of the shell 15 is provided with a rocker shaft 30, the rocker shaft 30 is pressed into a deep groove ball bearing 32 in an interference manner to form rigid connection, then a finger 31 is pressed into the rocker shaft by interference, a mounting hole is formed in the side face of the rocker shaft 30, a locking nut 34 locks an adjusting bolt 33 and a spring 35 into the mounting hole, and when the assembly is assembled, the adjusting bolt 33 is screwed to press the spring 35 to the limit position, so that the finger 31 and a tapered rollaway nest on the side edge of the steering nut 12 form gapless rolling fit.
When a driver turns a steering wheel, the torsion bar 2 is subjected to torsional deformation, a non-contact torque & angle sensor converts a detected torque signal into an electric signal and sends the electric signal to the controller 18, the controller 18 judges and processes the electric signal according to the torque signal, a vehicle speed signal and the like, a power assisting direction and power assisting current of the motor 19 are given by a power assisting characteristic curve determined in advance, the motor 19 is controlled by a power converting circuit to output power assisting torque, steering assisting control is completed, the output torque of the motor 19 acts on the worm 24, the worm 24 transmits the torque to the worm wheel 8 meshed with the worm wheel 8 and realizes speed reduction and torque increment, the worm wheel 8 transmits the torque to the steering screw 13 rigidly connected with the worm wheel, the steering screw 13 converts rotary motion into linear motion of the steering nut 12 through roller screw transmission, the steering nut 12 drives the rocker arm shaft 30 to rotate through the finger pin 31, the linear motion is converted into rotary motion, the rocker arm shaft 30 drives the steering mechanism to complete steering, the speed reduction and torque increment are realized, the steering mechanism realizes the power assisting effect achieved by the traditional recirculating ball power steering device through the change of a mechanical structure and a working principle, a set of a gear transmission pair of the traditional recirculating ball steering device is reduced, the difficulty of a set of a gear transmission pair of the traditional recirculating ball steering device is greatly reduced, and when the steering device has no processing cost and has no control of the steering device.
The crank finger type electric recirculating ball steering gear has the beneficial effects that: because the crank finger type electric circulating ball steering gear takes the motor as power, the motor is started only when needed, the motor is independent of the engine, the fuel oil of the engine is hardly consumed directly, meanwhile, the high-pressure hydraulic oil is not arranged in the steering gear, and only the heavy-load gear oil with lubrication and cooling functions is used, so that the possibility of oil leakage is greatly reduced, and the economical efficiency and the environmental protection performance of an automobile are improved; the motor power assisting is adjusted by collecting the vehicle speed and steering wheel torque signals through the controller, so that the driving comfort function of light low-speed steering and stable high-speed steering can be realized; the controller can also collect real-time rotation angles of the steering wheel through the torque and angle sensor, and the motor can be controlled to realize active alignment, so that the stability and the comfort of automobile operation are improved; the gear and rack transmission pair is changed into a crank slide block mechanism, gear processing equipment is not needed, parts can be processed by a numerical control lathe, a numerical control processing center and a cylindrical grinding machine, the scheme can be realized without new equipment, and the parts processing difficulty and the workpiece cost can be reduced; hydraulic elements such as an oil pump, an oil pipe and an oilcan are omitted, the structure of parts is simple, the installation is convenient, and the weight of the steering gear is lighter compared with that of a traditional steering gear; when the steering nut drives the rocker shaft to rotate, the finger rolls up and down in the nut chute, and the crank changes along with the change of the output rotation angle to change the force moment for transmitting the axial force of the screw rod, so that the variable-ratio transmission function is obtained, and meanwhile, the steering nut cannot be subjected to radial force to cause the bending deformation of the steering screw rod to influence the ball screw transmission, so that the transmission efficiency is ensured; after the steering nut and the conical finger pin are worn for a long time to generate a gap, the gap between the rocker shaft and the adjusting bolt can be automatically eliminated under the action of the axial force of the spring, so that the idle stroke of the steering system can be reduced, and the running operation stability of the vehicle is improved; the finger pin and the rocker shaft are split, and are connected through the rolling bearing to form a fit, so that the finger pin and the rocker shaft can be made of different materials, different hardness and strength requirements are met, and the processing of parts is facilitated.
It should be understood that in the claims and the description of the present invention, all "including … …" should be interpreted as an open meaning, i.e. as meaning equivalent to "at least … …", and not as a closed meaning, i.e. as meaning not including … … "only.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. A crank finger type electric recirculating ball steering gear is characterized in that: comprises a steering screw rod, an outer circle of the steering screw rod raceway is smaller than an inner hole of the steering nut raceway, the steering screw rod passes through the steering nut, the inner and outer circulating raceways are assembled through a steel ball and a conduit to form a ball screw transmission pair, a conduit clamp is used for firmly pressing the conduit, a screw and a gasket are used for fixing the conduit clamp, two ends of the steering screw rod are provided with thrust angular contact ball bearings, the two thrust angular contact ball bearings are symmetrically distributed with the central line of a rocker shaft and the plane perpendicular to the axis of the steering screw rod, the steering screw rod is axially applied with a certain pretightening force to carry out axial and radial limiting through the threaded connection of an adjusting screw plug and a shell, the adjusting screw plug is locked and loose-proof through a certain torque by the locknut, the steering screw rod passes through the adjusting screw plug hole and the worm wheel inner hole to form rigid connection through interference fit, and a non-contact torque and angle sensor is arranged on the steering screw rod shaft, the steering screw inner hole and the torsion bar outer circle form rigid connection through interference fit, the torsion bar passes through the input shaft inner hole to keep the proper axial distance between the input shaft and the steering screw and is fixed together after mechanical centering, the reaming holes are drilled and are fixed through cylindrical pins to form rigid connection, the input shaft outer circle passes through the magnetic ring inner hole and is rigidly connected with the input shaft through welding after electric centering, the sensor wire harness passes through the wire harness hole of the box body to be connected with the sensor and fixed on the box body, the right side of the box body is fixed with the shell through bolt connection, the left side of the box body is fixed with the upper cover through bolt connection, the input shaft outer circle passes through the upper cover inner hole, the worm wheel hole of the box body is provided with a worm, two ends of the worm are provided with two deep groove ball bearings to support, the end of a worm motor is provided with a coupling, the motor coupling is flexibly connected with the motor coupling through a shock pad, the motor is fixed with the box body through bolt connection, the controller is arranged at the tail part of the motor, and the other end of the sensor wire harness coming out of the box body is inserted into a sensor connector interface of the controller.
2. The crank finger type electric recirculating ball steering gear of claim 1, wherein: the inner and outer circulating roller paths need to be subjected to heat treatment and fine grinding after heat treatment so as to ensure the wear resistance after bearing and the smoothness of the transmission moment.
3. The crank finger type electric recirculating ball steering gear of claim 1, wherein: the worm wheel has the capabilities of bearing a large load, self-lubricating, wear-resisting and shock-absorbing.
4. The crank finger type electric recirculating ball steering gear of claim 1, wherein: the sensor is rigidly connected with the steering screw rod through welding.
5. The crank finger type electric recirculating ball steering gear of claim 1, wherein: the magnet ring needs to be kept at a proper distance from the sensor mounting axis.
6. The crank finger type electric recirculating ball steering gear of claim 1, wherein: the inner cavity of the shell is provided with a rocker shaft, the rocker shaft is pressed into a deep groove ball bearing in an interference manner to form rigid connection, then the finger is pressed into the rocker shaft in an interference manner, the side surface of the rocker shaft is provided with a mounting hole, the locking nut locks the adjusting bolt and the spring into the mounting hole, and the adjusting bolt is screwed to press the spring to the limit position when the assembly is assembled, so that the finger and the steering nut are in gapless rolling fit with the tapered rollaway nest on the side edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410295549.1A CN118144865A (en) | 2024-03-15 | 2024-03-15 | Crank finger type electric recirculating ball steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410295549.1A CN118144865A (en) | 2024-03-15 | 2024-03-15 | Crank finger type electric recirculating ball steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118144865A true CN118144865A (en) | 2024-06-07 |
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ID=91286281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410295549.1A Withdrawn CN118144865A (en) | 2024-03-15 | 2024-03-15 | Crank finger type electric recirculating ball steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118144865A (en) |
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2024
- 2024-03-15 CN CN202410295549.1A patent/CN118144865A/en not_active Withdrawn
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20240607 |