A driver hand force simulation device based on an electric power steering system

Abstract

The application discloses a driver hand force simulation device based on an electronic power steering system and relates to the technical field of steering power assistance, which comprises an input unit, an adjusting unit and an output unit, wherein the input unit comprises an input shaft and a plurality of transmission assemblies around the input shaft; the adjusting unit comprises a supporting disc, an extension rod and a balancing assembly; the output unit comprises a threaded pipe and an output shaft; and the application further comprises a shell.The application has the beneficial effects that the application can linearly adjust torque output conditions and provide diversified experimental conditions.When the output torque is unchanged, the driver hand force simulation device can be applied to a power steering system test bench, so that the power steering system can be more fully verified in terms of function logic, steering performance and dangerous working conditions, and the verification can be completed before the part design stage and the trial production of a sample vehicle, so that design and development problems can be found in advance.

Description

Technical Field

[0001] This invention relates to the field of power steering technology, and in particular to a driver hand force simulation device based on an electronic power steering system. Background Technology

[0002] Electronic power steering system test benches are widely used for testing the functional logic and performance of power steering systems. Currently, the driver's hand force input on existing power steering system test benches is primarily manual, and this method has the following drawbacks:

[0003] Manual operation cannot precisely control the input torque, angle, and angular velocity of the power steering system;

[0004] It is difficult to obtain the desired output torque of the booster motor, and the test data cannot be quantified;

[0005] It is difficult to provide diverse simulation conditions;

[0006] Traditional test benches for manually operated steering wheels can only be used for functional testing of power steering systems, and cannot be used for calibration of the power steering motor's assist curve. Summary of the Invention

[0007] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0008] In view of the problems existing in the above or prior art, the present invention is proposed.

[0009] Therefore, the purpose of this invention is to provide a driver hand force simulation device based on an electronic power steering system, which can solve the problem that traditional power steering system simulation cannot provide linearly adjustable and selectable diversified torque inputs in the initial experiment, resulting in a single output of angle and angular velocity data.

[0010] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a driver hand force simulation device based on an electronic power steering system, which includes an input unit, including an input shaft, and a plurality of transmission components disposed around the input shaft;

[0011] The adjustment unit includes a support plate, a plurality of telescopic rods disposed around the support plate, and a balancing assembly disposed below the telescopic rods;

[0012] The output unit includes a threaded tube and an output shaft disposed inside the threaded tube; and,

[0013] The housing has an upper end that is movably connected to the input unit and a lower end that is movably connected to the output unit. The adjustment unit is located between the input unit and the output unit and is movably connected to both the input unit and the output unit.

[0014] As a preferred embodiment of the driver's hand force simulation device based on the electronic power steering system of the present invention, the input shaft includes a support plate disposed on its shaft body, a drive wheel disposed at the lower end of the support plate, and a first limiting post disposed below the drive wheel.

[0015] As a preferred embodiment of the driver's hand force simulation device based on the electronic power steering system of the present invention, the transmission component includes: a positioning column, a plurality of hinged rods disposed on the body of the positioning column, a first driven gear disposed on the body of the positioning column, a movable rod disposed on one side of the positioning column, a second driven gear disposed on the body of the movable rod, a platform disposed below the movable rod, and a support spring disposed between the movable rod and the platform.

[0016] As a preferred embodiment of the driver hand force simulation device based on the electronic power steering system of the present invention, the movable rod includes a second limiting post disposed on its top and a limiting groove disposed in the inner cavity of the movable rod;

[0017] The ladder platform includes a first positioning rod disposed on its top, a limiting strip disposed on one side of the first positioning rod, and a positioning hole disposed on the bottom of the ladder platform;

[0018] The movable rod is fixedly connected to the second driven gear.

[0019] As a preferred embodiment of the driver hand force simulation device based on the electronic power steering system of the present invention, the support plate includes a plurality of sleeves disposed around it, a movable groove disposed through one side of the sleeve, a pressure-bearing cylinder disposed below the support plate, a prism hole disposed inside the pressure-bearing cylinder, a first thread disposed on the outer wall of the pressure-bearing cylinder, a bracket disposed at the bottom of the sleeve, a plug-in sleeve disposed at the bottom of the bracket, and a plug-in groove disposed on the inner wall of the plug-in sleeve.

[0020] As a preferred embodiment of the driver hand force simulation device based on the electronic power steering system of the present invention, the telescopic rod includes a first hinge post disposed on its side wall and a second positioning rod disposed at the end of the telescopic rod.

[0021] As a preferred embodiment of the driver's hand force simulation device based on the electronic power steering system of the present invention, the balance component includes a movable ring, a pressure spring disposed at the bottom of the movable ring, a plurality of connecting rods disposed around the pressure spring, and an adjusting nut disposed at the bottom of the pressure spring.

[0022] As a preferred embodiment of the driver's hand force simulation device based on the electronic power steering system of the present invention, the movable ring includes a plurality of second hinged columns disposed around it.

[0023] As a preferred embodiment of the driver hand force simulation device based on the electronic power steering system of the present invention, the threaded tube includes a connector strip disposed at its top, a second thread disposed on the side wall of the threaded tube, and a knurled ring disposed at the bottom of the threaded tube.

[0024] The output shaft includes a connecting post disposed at its top.

[0025] As a preferred embodiment of the driver hand force simulation device based on the electronic power steering system of the present invention, the housing includes a conical inner cavity disposed therein and an inspection door disposed on the side wall of the housing.

[0026] The beneficial effects of this invention are: This invention can linearly adjust torque output conditions, providing diverse experimental conditions. When the output torque remains constant, a power steering system test bench with a driver's hand force simulation device can be used to more fully verify the functional logic, steering performance, and hazardous operating conditions of the power steering system. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0028] Figure 1 This is a diagram of a test bench system for a driver's hand force simulation device based on an electronic power steering system.

[0029] Figure 2 This is a system diagram of a driver hand force simulation device based on an electronic power steering system.

[0030] Figure 3 This is a structural diagram of a driver's hand force simulation device based on an electronic power steering system.

[0031] Figure 4This is a cross-sectional view of a driver's hand force simulation device based on an electronic power steering system.

[0032] Figure 5 A driver hand force simulation device based on an electronic power steering system Figure 4 A magnified view of a local area.

[0033] Figure 6 A driver hand force simulation device based on an electronic power steering system Figure 4 A magnified view of part B. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0037] Example 1

[0038] Reference Figures 1-2 This is the first embodiment of the present invention. This embodiment provides a driver hand force simulation system for an electronic power steering system, which can solve the problems that it is difficult to accurately control the steering torque, angle and angular velocity input by manually operating the steering wheel; the test cannot obtain quantitative and accurate output torque of the power steering motor; and the power steering curve cannot be calibrated.

[0039] Better Figure 1 This is a power steering system test bench that utilizes a driver's hand force simulation device. It is based on a hardware-in-the-loop real-time simulation testing system, connected to a real steering column, column torque and angle sensors, controller, and power steering motor. The steering column input shaft and the driver's hand force simulation device are shown below. Figure 2The system is interconnected. The host computer controls a 400V three-phase AC power supply via the converter cabinet to control the driver's hand force simulation device, simulating the driver's input torque, angle, and angular velocity. The steering column output shaft is connected to the load motor. The real-time system runs a vehicle dynamics model to calculate the road load and controls the load motor to apply torque. Torque sensors are installed between the driver's hand force simulation motor and the load motor and the steering column to accurately measure the torque. The hard-wired input signal of the power steering system and the CAN signals of other network nodes are simulated by the real-time system.

[0040] Furthermore, such as Figure 2 As shown, the driver's hand force simulation motor has two operating modes: torque mode and angle mode. The host computer inputs the desired target torque / angle, and controls the 400V three-phase power output from the converter cabinet to make the motor output the target torque / angle. The torque sensor detects the actual output torque of the motor, and the torque signal is processed by the real-time system through the I / O interface and transmitted to the host computer for real-time display. The power steering system test bench using the driver's hand force simulation device is shown below. Figure 1 As shown, the real-time system simulates the CAN bus and hardwired input signals of the power steering system, collects its output CAN bus and hardwired signals, and controls the power supply to power the power steering motor. Various real-world road conditions are designed in scenario simulation software to build a vehicle dynamics simulation model, which runs on the real-time system. The real-time system controls the load motor to simulate the road load on the output bearing of the power steering system. The host computer controls the real-time system to send the CAN bus and hardwired signals required by the power steering system, and controls the input torque / angle of the driver's hand force simulation device. Combining various road condition scenarios, a series of system function test cases and steering performance debugging conditions are formed to verify whether the power steering system meets the design requirements.

[0041] In summary, the power steering system test bench with a driver hand force simulation device provided in this embodiment can more fully verify the functional logic, steering performance, and hazardous operating conditions of the power steering system. Verification can be completed during the component design stage and before prototype manufacturing, allowing for early identification of design and development issues. The host computer controls the driver hand force simulation motor to accurately simulate the driver's input torque, steering angle, and angular velocity, achieving a torque accuracy of 0.5 Nm, thus obtaining accurate power steering motor output torque. Furthermore, this device allows for the adjustment of various calibration parameters related to steering performance, such as the basic power steering assist curve, active return curve, friction compensation, damping compensation, and inertia compensation.

[0042] Example 2

[0043] Reference Figures 3-6This is the second embodiment of the present invention, which differs from the first embodiment in that: the driver hand force simulation device based on the electronic power steering system includes an input unit 100, including an input shaft 101, and a plurality of transmission components 102 disposed around the input shaft 101;

[0044] The adjustment unit 200 includes a support plate 201, a plurality of telescopic rods 202 disposed around the support plate 201, and a balance component 203 disposed below the telescopic rods 202;

[0045] The output unit 300 includes a threaded tube 301 and an output shaft 302 disposed inside the threaded tube 301; and,

[0046] Housing 400; the upper end of housing 400 is movably connected to input unit 100; the lower end of housing 400 is movably connected to output unit 300; adjustment unit 200 is located between input unit 100 and output unit 300, and adjustment unit 200 is movably connected to input unit 100 and output unit 300 respectively.

[0047] Preferably, the input shaft 101 includes a support plate 101a disposed on its shaft body, a drive wheel 101b disposed at the lower end of the support plate 101a, and a first limiting post 101c disposed below the drive wheel 101b.

[0048] Preferably, the transmission assembly 102 includes a positioning post 102a, a plurality of hinged rods 102b disposed on the body of the positioning post 102a, a first driven gear 102c disposed on the body of the positioning post 102a, a movable rod 102d disposed on one side of the positioning post 102a, a second driven gear 102e disposed on the body of the movable rod 102d, a platform 102f disposed below the movable rod 102d, and a support spring 102g disposed between the movable rod 102d and the platform 102f.

[0049] Preferably, the movable rod 102d includes a second limiting post 102d-1 disposed at its top and a limiting groove 102d-2 disposed in the inner cavity of the movable rod 102d; the platform 102f includes a first positioning rod 102f-1 disposed at its top, a limiting strip 102f-2 disposed on one side of the first positioning rod 102f-1, and a positioning hole 102f-3 disposed at the bottom of the platform 102f; the movable rod 102d is fixedly connected to the second driven gear 102e.

[0050] Preferably, the support plate 201 includes a plurality of sleeves 201a disposed around it, a movable groove 201b disposed through one side of the sleeve 201a, a pressure-bearing cylinder 201c disposed below the support plate 201, a prism hole 201d disposed inside the pressure-bearing cylinder 201c, a first thread 201e disposed on the outer wall of the pressure-bearing cylinder 201c, a bracket 201f disposed at the bottom of the sleeve 201a, a plug-in sleeve 201g disposed at the bottom of the bracket 201f, and a plug-in groove 201h disposed on the inner wall of the plug-in sleeve 201g.

[0051] Preferably, the telescopic rod 202 includes a first hinge post 202a disposed on its side wall and a second positioning rod 202b disposed at the end of the telescopic rod 202.

[0052] Preferably, the balancing assembly 203 includes a movable ring 203a, a pressure spring 203b disposed at the bottom of the movable ring 203a, a plurality of connecting rods 203c disposed around the pressure spring 203b, and an adjusting nut 203d disposed at the bottom of the pressure spring 203b.

[0053] Preferably, the movable ring 203a includes a plurality of second hinge posts 203a-1 disposed around it.

[0054] Preferably, the threaded tube 301 includes a plug bar 301a disposed on its top, a second thread 301b disposed on the side wall of the threaded tube 301, and a knurled ring 301c disposed on the bottom of the threaded tube 301; the output shaft 302 includes a connecting post 302a disposed on its top.

[0055] Preferably, the housing 400 includes a conical inner cavity 401 disposed therein, and an access door 402 disposed on the side wall of the housing 400.

[0056] It should be noted that the housing 400 is in the shape of an inverted trapezoid, with a through hole on the upper end face for engaging the input shaft 101, and a threaded hole on the lower end face. Since the outer wall of the threaded tube 301 has a second thread 301b, this hole can mate with the threaded tube 301. In addition, a tapered inner cavity 401 is provided in the waist of the housing 400, and the inner sidewall of the tapered inner cavity 401 can be in close contact with the outer wall of the trapezoid 102f.

[0057] Preferably, the input shaft 101 is directly connected to the steering wheel, allowing the input shaft 101 to rotate when the steering wheel is turned. A support plate 101a is fixed to the lower end of the input shaft 101. The gap between the support plate 101a and the drive wheel 101b can be used to engage with the through hole at the upper end of the housing 400, thus allowing the input shaft 101 to rotate at the upper end of the housing 400 without disengaging. The drive wheel 101b can directly mesh with the three first driven gears 102c around it. A first limiting post 101c is also fixed to the lower end face of the drive wheel 101b, which can be hinged to three hinge rods 102b simultaneously. The other end of the hinge rods 102b is hinged to three positioning posts 102a at corresponding positions.

[0058] Preferably, in this embodiment, the three hinge rods 102b that are simultaneously hinged to the first limiting post 101c can be integrated into a trident-shaped irregular hinge rod 102b that is evenly radiating outwards. This makes the movement more regular than the movement of the three hinge rods 102b that are simultaneously connected, and can maintain the synchronization of movement and share the torque.

[0059] Preferably, the positioning post 102a is used to cooperate with the first driven gear 102c, and under the support of the hinge rod 102b connected to the first limiting post 101c, the first driven gear 102c is kept stably on a single horizontal plane and will not fall off.

[0060] Preferably, each positioning post 102a is connected to two hinge rods 102b. In addition to the hinge rod 102b connected to the first limiting post 101c, the other hinge rod is connected to the second limiting post 102d-1 at the upper end of the movable rod 102d. All hinge rods 102b can support the first driven gear 102c. Furthermore, a second driven gear 102e is fixed to the second limiting post 102d-1. The second driven gear 102e can always mesh with the first driven gear 102c. Therefore, when the input shaft 101 rotates, each second driven gear 102e will also rotate, directly driving the movable rod 102d at the corresponding position to rotate.

[0061] Preferably, the first positioning rod 102f-1 at the top of each platform 102f can be directly inserted into the cylindrical cavity of the corresponding movable rod 102d. Since the side wall of the first positioning rod 102f-1 is also provided with a limiting strip 102f-2, it can be directly inserted into the limiting groove 102d-2 opened in the side wall of the cavity of the movable rod 102d, ensuring that the movable rod 102d can drive the platform 102f to rotate, and also supporting the axial relative displacement between the two, ensuring that the transmission will not be lost when the displacement between the two occurs. The cylindrical inner cavity of the movable rod 102d is relatively long. Therefore, a support spring 102g is fixed between the top of the cylindrical inner cavity of the movable rod 102d and the top of the first positioning rod 102f-1. This spring can provide upward support for the positioning rod 102f-1, reduce the load-bearing pressure on the hinge rod 102b, and improve the transmission efficiency of the entire transmission assembly 102. The support spring 102g can also apply downward force to the platform 102f. Since a positioning hole 102f-3 is provided below the platform 102f, it can be inserted into the second positioning rod 202b at the end of the telescopic rod 202. The two are movably connected, ensuring a stable connection between the platform 102f and the telescopic rod 202 and preventing slippage.

[0062] Preferably, the transmission assembly 102 has three sets. When the three platforms 102f rotate, the corresponding telescopic rods 202, due to the setting of the conical inner cavity 401, can force the support plate 201 to rotate through the surface friction, thus playing a role in decelerating and increasing the torque of the support plate 201.

[0063] Preferably, the platform 102f can be made of rubber, which has a certain deformation capacity to ensure reliable friction.

[0064] Preferably, the side wall of the support plate 201 is fixed with three evenly distributed sleeves 201a. The sleeves 201a can cooperate with the telescopic rod 202, so the telescopic rod 202 can slide linearly inside the sleeves 201a. In order to further ensure the stability during the sliding process and avoid the tendency to rotate, the side wall of the sleeves 201a is also provided with a through moving groove 201b in the vertical direction for inserting the first hinge post 202a.

[0065] Preferably, a pressure-bearing cylinder 201c is also fixed on the support plate 201. The outer wall of the pressure-bearing cylinder 201c is provided with a first thread 201e, which can cooperate with the adjusting nut 203d. The pressure-bearing cylinder 201c is also provided with a single-sided through hexagonal prism hole 201d, which can be directly inserted into the connecting post 302a on the output shaft 302. The connecting post 302a is also hexagonal prism, ensuring that the support plate 201 can output power to the output shaft 302 when rotating.

[0066] Preferably, three supports 201f are fixed directly below the three sleeves 201a. A ring-shaped insertion sleeve 201g is fixed to the bottom of each support 201f. The inner wall of the insertion sleeve 201g has an insertion groove 201h for engaging with the ring-shaped insertion strip 301a on the threaded tube 301. Therefore, the insertion sleeves 201g and 201g can rotate relative to each other. When the knurled ring 301c is rotated, the threaded tube 301 rotates and rises or falls, and the entire support plate 201 rises or falls accordingly. Furthermore, the rising and rotating movements of the support plate 201 are independent and do not interfere with each other. The threaded tube 301 itself has a self-locking capability for axial movement, thus ensuring the stability of the support plate 201's position.

[0067] Preferably, those skilled in the art will readily conceive of how to further lock the threaded tube 301.

[0068] Preferably, the movable ring 203a is sleeved on the outer wall of the pressure-bearing cylinder 201c, and three evenly distributed second hinge posts 203a-1 are fixed on the outer wall of the movable ring 203a.

[0069] Preferably, there are three connecting rods 203c. Each connecting rod 203c is hinged at both ends to the first hinge post 202a and the second hinge post 203a-1, respectively. When the movable ring 203a moves in the axial direction, the telescopic rod 202 can be forced to move laterally through each connecting rod 203c.

[0070] Preferably, a pressure spring 203b is also fixed between the adjusting nut 203d and the movable ring 203a. The pressure spring 203b can apply an upward force to the movable ring 203a, ensuring that the telescopic rod 202 always pushes against the inner wall of the conical inner cavity 401, so that the platform 102f always fits tightly against the conical inner cavity 401.

[0071] Preferably, when the threaded pipe 301 rises, the telescopic rod 202 gradually extends outward, causing the movable ring 203a to rise. This directly reduces the clamping effect of the pressure spring 203b, decreasing the friction between the platform 102f and the inner wall of the conical cavity 401, thus preventing the platform 102f and the inner wall of the conical cavity 401 from forming an effective relative movement. Therefore, personnel can open the inspection door 402 and turn the adjusting nut 203d with a wrench to ensure that the force provided by the pressure spring 203b remains effective and reliable.

[0072] In use, the input shaft 101 can be rotated step by step to drive the first driven gear 102c and the second driven gear 102e to rotate, which in turn drives the ladder 102f to rotate. Since the ladder 102f and the tapered inner cavity 401 have the same taper, the ladder 102f will fit against the inner wall of the tapered inner cavity 401 to the maximum extent and move along the inner wall, thereby causing the support plate 201 to rotate. Since the output shaft 302 is inserted into the prism hole 201d through the hexagonal connecting post 302a, the output shaft 302 is also driven to rotate.

[0073] When torque adjustment is required, the operator can rotate the threaded pipe 301 to move the support plate 201 up or down. At this time, the platform 102f will move up or down along the inner wall of the conical cavity 401. The transmission ratio changes linearly, and each telescopic rod 202 will extend or retract accordingly. The movable ring 203a will also rise or fall accordingly. At this time, the force of the pressure spring 203b will increase or decrease, which directly causes the friction between the platform 102f and the inner wall of the conical cavity 401 to decrease or increase. Therefore, the operator needs to actively intervene in the force of the pressure spring 203b.

[0074] When the platform 102f moves up or down, its horizontal position changes. Since the length of the hinge rod 102b is fixed, the line connecting the centers of the driving wheel 101b and the first driven gear 102c remains unchanged. Similarly, the line connecting the centers of the first driven gear 102c and the second driven gear 102e also remains unchanged. Therefore, the meshing relationship between the driving wheel 101b, the first driven gear 102c, and the second driven gear 102e does not change. Because the positioning column 102a has two hinge rods 102b, even if the positions of the first driven gear 102c and the second driven gear 102e move horizontally with the platform 102f, the transmission input from the input shaft 101 will not be interrupted.

[0075] When the platform 102f moves up or down, the longitudinal displacement between the movable rod 102d and the platform 102f will change accordingly. Due to the cooperation of the limit bar 102f-2 and the limit groove 102d-2, the transmission input from the input shaft 101 will not be interrupted.

[0076] When it is necessary to adjust the friction between the platform 102f and the inner wall of the conical cavity 401, open the access door 402 and manually rotate the adjusting nut 203d so that the pressure spring 203b can always provide the appropriate force.

[0077] Therefore, this device can linearly adjust the torque, directly using the determined torque as the output condition for the simulation experiment, thus providing diverse experimental conditions. It has a simple and compact structure, can evenly distribute the input torque, and is inexpensive.

[0078] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0079] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0080] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A driver's hand force simulation device based on an electronic power steering system, characterized in that: include, The input unit (100) includes an input shaft (101) and a plurality of transmission components (102) disposed around the input shaft (101). The adjustment unit (200) includes a support plate (201), a plurality of telescopic rods (202) disposed around the support plate (201), and a balancing component (203) disposed below the telescopic rods (202). The output unit (300) includes a threaded tube (301) and an output shaft (302) disposed inside the threaded tube (301); and, Housing (400); the upper end of the housing (400) is movably connected to the input unit (100); the lower end of the housing (400) is movably connected to the output unit (300); the adjustment unit (200) is located between the input unit (100) and the output unit (300), and the adjustment unit (200) is movably connected to the input unit (100) and the output unit (300) respectively; The input shaft (101) includes a support plate (101a) disposed on its shaft body, a drive wheel (101b) disposed at the lower end of the support plate (101a), and a first limiting post (101c) disposed below the drive wheel (101b). The transmission assembly (102) includes a positioning post (102a), a plurality of hinge rods (102b) disposed on the body of the positioning post (102a), a first driven gear (102c) disposed on the body of the positioning post (102a), a movable rod (102d) disposed on one side of the positioning post (102a), a second driven gear (102e) disposed on the body of the movable rod (102d), a platform (102f) disposed below the movable rod (102d), and a support spring (102g) disposed between the movable rod (102d) and the platform (102f). The movable rod (102d) includes a second limiting post (102d-1) disposed on its top and a limiting groove (102d-2) disposed in the inner cavity of the movable rod (102d). The ladder (102f) includes a first positioning rod (102f-1) disposed on its top, a limiting strip (102f-2) disposed on one side of the first positioning rod (102f-1), and a positioning hole (102f-3) disposed on the bottom of the ladder (102f). The movable rod (102d) is fixedly connected to the second driven gear (102e); The support plate (201) includes a plurality of sleeves (201a) disposed around it, a movable groove (201b) through one side of the sleeve (201a), a pressure-bearing cylinder (201c) disposed below the support plate (201), a prism hole (201d) disposed inside the pressure-bearing cylinder (201c), a first thread (201e) disposed on the outer wall of the pressure-bearing cylinder (201c), a bracket (201f) disposed at the bottom of the sleeve (201a), a plug-in sleeve (201g) disposed at the bottom of the bracket (201f), and a plug-in groove (201h) disposed on the inner wall of the plug-in sleeve (201g). The telescopic rod (202) includes a first hinge post (202a) disposed on its side wall and a second positioning rod (202b) disposed at the end of the telescopic rod (202). The balancing assembly (203) includes a movable ring (203a), a pressure spring (203b) disposed at the bottom of the movable ring (203a), a plurality of connecting rods (203c) disposed around the pressure spring (203b), and an adjusting nut (203d) disposed at the bottom of the pressure spring (203b). The movable ring (203a) includes a plurality of second hinge posts (203a-1) disposed around it; The threaded tube (301) includes a plug strip (301a) disposed on its top, a second thread (301b) disposed on the side wall of the threaded tube (301), and a knurled ring (301c) disposed on the bottom of the threaded tube (301). The output shaft (302) includes a connecting post (302a) disposed on its top; The housing (400) includes a conical inner cavity (401) disposed therein, and an access door (402) disposed on the side wall of the housing (400).

Images