Steering actuation input device and steer-by-wire steering device

Abstract

In the steering actuation input device (1) and the steer-by-wire steering device (SD) of the invention, the steering actuation input element (33) comprises an actuation unit (5) which is actuated when a steering angle is applied to the vehicle wheels (WR / WL), and a fixed section (6) which is fixedly arranged at a position different from the actuation unit (5) and is designed such that, during the actuation of the actuation unit (5) by the driver, the driver's actuating hand (H) comes into contact with the fixed section (6).Therefore, when operating the actuating unit (5), the driver, since his actuating hand (H) comes into contact with the actuating unit (5) and the fixed section (6) simultaneously, can feel a difference in the displacement between the actuating unit (5) and the fixed section (6) at these contact sections and adjust the frictional force between the actuating unit (5) and his actuating hand (H), thereby making the actuating unit 5 easily fine-tunable during forward and reverse rotation and improving the operability of the steering actuation input device (1).

Description

Technical field

[0001] The present invention relates to a steering actuation input device and a steer-by-wire steering device. State of the art

[0002] A related steering actuation input device is, for example, a steering actuation input device which is described in the following patent document 1.

[0003] This means that the related steering input device is used in a so-called steer-by-wire steering system and includes a rotary knob that can be turned by the driver with one hand. The related steering input device is capable of performing steering maneuvers in the direction of rotation by the driver turning the rotary knob. List of cited documents Patent document

[0004] Patent document 1: Japanese unexamined patent application, publication number 2020-172135 Summary of the invention: Technical problem

[0005] However, the improvement in usability is not taken into account at all in the related steering actuation input device.

[0006] The present invention was developed with regard to the aforementioned technical problem of a steering actuation input device from the prior art. The objective of the present invention is therefore to provide a steering actuation input device and a steer-by-wire steering device that can improve usability. Solution to the problem

[0007] According to one aspect of the present invention, a steering actuation input element comprises: an actuating unit which is actuated when a steering angle is applied to the wheels of a vehicle; and a fixed section which is fixedly arranged at a position different from the actuating unit and is constructed such that, during actuation of the actuating unit by the driver, the driver's actuating hand comes into contact with the fixed section. Effects of the invention

[0008] According to the present invention, it is possible to improve usability. Brief description of the drawings Fig. Figure 1 is a schematic diagram of a steer-by-wire steering device according to the present invention. Fig. Figure 2 is a perspective view of a steering actuation input element according to a first embodiment of the present invention. Fig. Figure 3 is a perspective view of a steering actuation input device, which shows an actuation mode of the in Fig. The steering actuation input element shown in section 2 is shown. Fig. 4A to 4C are top views of the in Fig. 2 steering actuation input elements shown, which show the operating modes of the steering actuation input element. Fig. 4A shows a straight-ahead state (driving straight ahead) (including a right / left steering state with a small steering angle). Fig. 4B shows a right-hand drive condition with a large steering angle. Fig. 4C indicates a left-hand drive condition with a large steering angle. Fig. Figure 5 is a perspective view of a steering actuation input element according to a second embodiment of the present invention. Fig. Figure 6 is another example of the second embodiment of the present invention, showing a cross-section of the steering actuation input element with a different mounting section and a different column section. Fig. Figure 7 is a perspective view of the steering actuation input element, showing an actuation mode of the in Fig. The steering actuation input element shown in section 5 is shown. Fig. 8A to 8C are top views of the in Fig. The steering actuation input element shown in Figure 5 demonstrates the actuation modes of the steering actuation input element. Fig. 8A shows a straight-ahead state (driving straight ahead) (including right and left steering states with small steering angles). Fig. 8B shows a right-hand drive condition with a large steering angle. Fig. 8C indicates a left-hand drive condition with a large steering angle. Fig. Figure 9 is a perspective view of a steering actuation input element according to a third embodiment of the present invention. Fig. Figure 10 is a perspective view of the steering actuation input element, which shows an operating mode of the in Fig. The steering actuation input element shown in 9 is shown. Fig. 11A to 11C are top views of the in Fig. The steering actuation input element shown in Figure 9 demonstrates the operating modes of the steering actuation input element. Fig. 11A shows a straight-ahead state (driving straight ahead) (including right and left steering states with small steering angles). Fig. Figure 11B shows a right-hand drive condition with a large steering angle. Fig. 11C shows a left-hand drive condition with a large steering angle. Exemplary embodiments of the invention

[0009] Exemplary embodiments of a steering actuation input device and a steer-by-wire steering device according to the present invention are described below with reference to the drawings. The following exemplary embodiments describe examples in which, as in related technology, the steering actuation input device and the steer-by-wire steering device are applied to a vehicle steer-by-wire steering system. (Configuration of the steer-by-wire steering system)

[0010] Fig. Figure 1 shows a schematic system configuration of a steer-by-wire steering device SD according to the present invention. It should be noted that Fig. 1 is a pictorial diagram showing the system configuration of the steer-by-wire steering device SD, and not a diagram showing a specific shape or structure of the steer-by-wire steering device SD according to embodiments of the present invention.

[0011] For example, in Fig. As shown in Figure 1, the steer-by-wire steering device SD of the present invention comprises a steering input device 1 and a rotary device 2. The steering input device 1 and the rotary device 2 are configured to be mechanically separated from each other. The steering input device 1 comprises a steering input element 3, which is used to input a steering input, and a reaction force unit 4, which exerts a reaction force on an actuating unit 5 of the steering input element 3, as described below.

[0012] The steering actuation input element 3 comprises the actuation unit 5 and a fixed section 6 (in Fig. 1 not shown, see Fig. 2) The actuating unit 5 has a rotary knob 51, corresponding to a steering wheel, and a rotary shaft 52, which is connected to the rotary knob 51 and corresponds to a steering shaft. A steering angle entered via the rotary knob 51, i.e., a rotation angle of the rotary knob 51, is detected by a steering angle sensor AS, which is connected to the rotary shaft 52 and rotates integrally and synchronously with the rotary knob 51. The steering angle sensor AS is connected to a vehicle control unit 7 and outputs a detected steering angle signal to the control unit 7.

[0013] The reaction force unit 4 is configured, for example, by a reaction force actuator CA. The reaction force actuator CA is connected to the control unit 7 and is driven and controlled by it. More precisely, the reaction force actuator CA generates a reaction force according to the driving conditions, such as the rotational speed of a vehicle (vehicle speed) and the road conditions. In the present embodiment, the known reaction force actuator CA is illustrated as an example for the reaction force unit 4.

[0014] The reaction force unit 4 is not limited to a configuration that generates a reaction force electrically, such as the reaction force actuator CA, but can also be a configuration that generates a reaction force mechanically, such as a pressure element (a coil spring). In other words, the reaction force unit 4 could be modified at will according to the specifications of the steering device SD, as long as the reaction force unit 4 can generate a reaction force on the actuating unit 5 of the steering actuating input device 3.

[0015] The control unit 7 is electrically connected to the steering angle sensor AS, the vehicle-mounted external sensors OS, and a rotational speed sensor DS, and drives and controls the reaction force actuator CA and a rotary actuator DA described below. The external sensors OS include a vehicle speed sensor and various other sensors.

[0016] The rotary device 2 comprises a rack and pinion 21 as a steering shaft connecting the right and left steered wheels WR and WL of the vehicle, a tie rod 22 connecting the rack and pinion 21 to the wheels WR and WL, and the rotary actuator DA, which moves the rack and pinion 21 in the width direction of the vehicle. The rack and pinion 21 and the rotary actuator DA are connected to each other via, for example, a transmission mechanism (not shown) and a speed reduction mechanism (not shown). The transmission mechanism transfers a rotational force from the rotary actuator DA to the rack and pinion 21. The transmission mechanism consists, for example, of an input-side pulley connected to a rotary shaft of the rotary actuator DA, an output-side pulley connected to the rack and pinion 21, and a belt tensioned between the two pulleys.The speed reduction mechanism reduces a torque transmitted via the transmission mechanism and converts the torque into a motion force in the axial direction of the rack 21. The speed reduction mechanism is configured, for example, by a ball screw arranged between the output-side pulley and the rack 21.

[0017] The rack and pinion 21 is connected to a steering shaft position sensor PS, which can determine the axial position of the rack and pinion 21. The steering shaft position sensor PS is connected to the control unit 7 and outputs a determined position signal of the rack and pinion 21 to the control unit 7. This means that, based on the position signal of the rack and pinion 21 determined by the steering shaft position sensor PS, the control unit 7 calculates a movement amount in the axial direction of the rack and pinion 21 from the steering angle signal determined by the steering angle sensor AS and drives and controls the rotary actuator DA. This results in a thrust being exerted on the rack and pinion 21 corresponding to its axial position. [First embodiment](configuration of the steering actuation input device)

[0018] Fig. Figure 2 is a perspective view of a steering actuation input element 31 according to a first embodiment of the present invention, seen from the driver's side (rear). To simplify the following description, a rotation axis of the rotary knob 51 is shown in Fig. 2. The axis of rotation Z is designated as the axis of rotation. A direction along the axis of rotation Z is called the "axial direction," a direction orthogonal to the axis of rotation Z is called the "radial direction," and a direction of rotation around the axis of rotation Z is called the "circumferential direction." Furthermore, the direction of travel of the vehicle is designated as "front," the side opposite the direction of travel is designated as "rear," the top side in a vertical direction is designated as "top," and the bottom side in a vertical direction is designated as "bottom."

[0019] For example, as in Fig. Figure 2 shows the steering input element 31, according to the present embodiment, provided on a center console (not shown) in the vehicle interior. More precisely, the steering input element 31 comprises the actuating unit 5, which is used to input the driver's steering input and rotates due to the driver's steering input, and the fixed section 6, which is fixed relative to the actuating unit 5 and does not rotate relative to the rotation of the actuating unit 5.

[0020] The steering actuation input element 3 comprises the rotary knob 51, which rotates according to the steering actuation input, and the rotary shaft 52 (in Fig. 2 not shown, see Fig. 1) which is connected to the rotary knob 51 so that it can rotate integrally with the rotary knob 51. The pivot shaft 52 is connected to the center of the rotary knob 51 so that the axis of rotation Z of the pivot shaft 52 and the center of the rotary knob 51 coincide. This structure allows an actuation amount (a rotation amount) of the rotary knob 51 to be reflected linearly in the steering angle. The rotary knob 51 and the pivot shaft 52 are connected to each other in such a way that they can rotate integrally with each other by means of a predetermined fastening device, such as press-fitting or screwing. It should be noted that the rotary knob 51 and the pivot shaft 52 do not necessarily have to be separate elements, but can also be designed as an integral element.

[0021] The rotary knob 51 is made of a plastic or metal material in a cylindrical shape with a base. More precisely, the rotary knob 51 has a mounting surface 511, which is provided on the upper surface of the rotary knob 51 and on which an operating hand H (in Fig. 2 not shown, see Fig. 3) is mounted or placed on, and an actuating surface 512 is provided on an outer circumferential surface of the rotary knob 51 and is used for steering (rotary) actuation of the rotary knob 51 by the actuating hand H. The mounting surface 511 is formed by a flat surface parallel to an actuating base 30. The actuating surface 512 is continuous along a circumferential direction of the rotary knob 51. The actuating surface 512 has a relatively rough surface compared to the support section 62 of the fixed section 6 described below. It is desirable that the actuating surface 512 be subjected to an anti-slip or machining process to increase friction with the actuating hand H, for example by knurling.

[0022] The rotary shaft 52 runs vertically through the actuating base 30 located on the center console (not shown). The rotary knob 51 is connected to an axial end section of the rotary shaft 52 that projects from the actuating base 30. Conversely, the reaction force actuator CA is connected to the other axial end section of the rotary shaft 52, which points towards the inside of the actuating base 30 (the inside of the center console (not shown)).

[0023] The actuating base 30 is essentially rectangular with a constant thickness. The actuating base 30 is provided, for example, on the center console (not shown). The actuating base 30 can be integrally formed with the center console. The actuating base 30 has a recessed section 301 at its front end, which is recessed towards the center console (towards the other axial end section of the rotary shaft 52). The recessed section 301 has a shape corresponding to the fixed section 6 (a flanged section 61 described below). The recessed section 301 is designed such that the flanged section 61 of the fixed section 6 can be fitted into the recessed section 301.

[0024] The fixed section 6 comprises the flanged section 61, which is attached to the actuating base 30, and the cylindrical support section 62, which is grasped by some fingers of the actuating hand H. The flanged section 61 and the support section 62 are integrally formed together. The flanged section 61 is fitted into the recessed section 301 of the actuating base 30 and fastened to the actuating base 30 by any fastener, for example, one or more screws (not shown). The support section 62 is designed to rise vertically from the flanged section 61 and to extend from the flanged section 61 along the axial direction to the rotary knob 51. The support section 62 has substantially the same shape as the rotary knob 51 and has an outer circumferential surface designed to have substantially the same diameter as the outer diameter of the actuating surface 512 of the rotary knob 51.The outer circumferential surface of the support section 62 is designed to have a relatively low surface roughness compared to the actuation surface 512. (Description of the operating mode of the steering actuation input device)

[0025] Fig. 3 is a perspective view of the in Fig. Figure 2 shows the steering actuation input element 31, viewed from its front, which illustrates an actuation mode of the steering actuation input element 31, actuated by the actuating hand H. An example of the actuation mode of the steering actuation input element 31 is described below.

[0026] For example, in Fig. Figure 3 illustrates the actuation mode of the steering actuation input element 31 by the actuating hand H in a state in which the palm of the actuating hand H rests on the mounting surface 511 of the rotary knob 51 and the support section 62 of the fixed section 6 is grasped, for example, with the thumb F1, the third finger (ring finger) F4 and the little finger F5 of the actuating hand H, while the index finger F2 and the middle finger F3 of the actuating hand H are hooked onto the actuating surface 512 of the rotary knob 51. This state is a basic position for the actuation of the steering actuation input element 31.

[0027] Here, particularly in the present embodiment, the support section 62 of the fixed section 6 is not intended to fix the fingers F1, F4, and F5 of the operating hand H during the steering operation described below, but is merely provided for gripping to support the operating hand H. In other words, during steering operation, to facilitate the operation of the rotary knob 51 with the index finger F2 and / or the middle finger F3 of the operating hand H, the fingers F1, F4, and / or F5 used to support the operating hand H can be appropriately displaced in the direction of rotation while sensing a difference in the displacement of the rotary knob 51 corresponding to the operation with the index finger F2 and / or the middle finger F3 of the operating hand H. (Description of the actuation method of the steering actuation input device)

[0028] The Fig. 4A to 4C are top views of the in Fig. 2 shown steering actuation input element 31, which show the actuation modes of the steering actuation input element 31. Fig. 4A shows a straight-ahead state (driving straight ahead) (including right and left steering states with small steering angles). Fig. 4B shows a right-hand drive condition with a large steering angle. Fig. 4C indicates a left-hand drive condition with a large steering angle.

[0029] When the vehicle is traveling straight ahead, as for example in Fig. As shown in Figure 4A, the pads (fleshy parts) of the index finger F2 and middle finger F3 of the operating hand H are hooked onto the front actuating surface 512 of the rotary knob 51, while the thumb F1, ring finger F4, and little finger F5 of the operating hand H grasp or hold the support section 62 of the fixed section 6. This holds the rotary knob 51 in a neutral position by the index finger F2 and middle finger F3 of the operating hand H.

[0030] In the case of a relatively small right-hand steering action, i.e., a so-called right-hand steering action with a small steering angle, in the straight-ahead position, moving the index finger F2 of the operating hand H, which is hooked onto the actuating surface 512, in a right direction turns the rotary knob 51 in the right direction, so that it is pulled and rotated by the index finger F2, and the right-hand steering with the small steering angle is executed. Conversely, in the case of a relatively small left-hand steering action, i.e., a so-called left-hand steering action with a small steering angle, moving the middle finger F3 of the operating hand H, which is hooked onto the actuating surface 512, in a left direction in the straight-ahead position turns the rotary knob 51 in the left direction, so that it is pulled and rotated by the middle finger F3, and the left-hand steering with the small steering angle is executed.

[0031] With a relatively strong right-hand steering action, i.e., a so-called right-hand steering action with a large steering angle, as for example in Fig. As shown in 4B, the actuation is carried out by moving the index finger F2 of the actuating hand H out of the Fig. In the basic straight-ahead position shown in Figure 4A, the lever is opened (moved) to the right to pull the index finger F2 towards the driver's side (i.e., backwards), while the support section 62 of the fixed section 6 is grasped and held by the thumb F1, ring finger F4, and little finger F5 of the operating hand H. This causes the rotary knob 51 to rotate in the right direction (clockwise) while being pulled by a side surface (a side surface on the side of the middle finger F3) of the index finger F2 of the operating hand H, and the right-hand steering with a large steering angle is executed.

[0032] With a relatively strong left-hand steering input, i.e., a so-called left-hand steering input with a large steering angle, as for example in Fig. As shown in 4C, the actuation is carried out by extending the middle finger F3 of the actuating hand H from the Fig. In the basic straight-ahead position shown in Figure 4A, the lever is opened (moved) to the left to pull the middle finger F3 towards the driver's side (i.e., rearward) while the support section 62 of the fixed section 6 is grasped or held by the thumb F1, ring finger F4, and little finger F5 of the operating hand H. This causes the rotary knob 51 to rotate to the left (counterclockwise) while being pulled by a side surface (a side surface on the side of the index finger F2) of the middle finger F3 of the operating hand H, and the left-hand steering with a large steering angle is executed. (Activation and effects of the present embodiment)

[0033] As mentioned above, the related steering control input device does not take any account of improving usability. More precisely, the related steering control input device is configured so that steering is performed by simply gripping the rotary knob, which is the steering control input element. Therefore, there is room for improvement, as it is difficult to perform steering operations properly, for example, when steering with a relatively small steering angle, when fine-tuning the steering angle for turning forward and backward, and when holding the steering wheel. Furthermore, if the vehicle is vibrating, the vibrations hinder the operation (actuation action) with the operating hand. It is therefore difficult to perform steering operations properly.

[0034] In contrast, according to the steering actuation input device 1 of the present embodiment, the following actuations and effects can be achieved, thereby solving the above-mentioned problem of the steering actuation input device of the related technology.

[0035] That is, the steering input device 1 according to the present embodiment is the steering input device comprising the rotary knob 51, which inputs the driver's steering input, and the reaction force unit 4 (the reaction force actuator CA), which exerts a reaction force in the direction in which the rotary knob 51 is returned to the neutral position. The steering input device 1 also comprises the actuating unit 5 (the rotary knob 51 and the rotary shaft 52), which is actuated when a steering angle is applied to the wheels WR and WL of the vehicle, and the fixed section 6, which is fixedly arranged in a different position than the actuating unit 5 and does not move in response to the driver's steering input. The fixed section 6 is designed such that, during the actuating action of the actuating unit 5 by the driver, the driver's operating hand H comes into contact with the fixed section 6.

[0036] As described above, the steering actuation input element 31 according to the present embodiment comprises the actuation unit 5, which is actuated when a steering angle is applied to the wheels WR and WL of the vehicle, and the fixed section 6, which is fixedly arranged at a different position than the actuation unit 5 and is designed such that, during actuation of the actuation unit 5 by the driver, the driver's actuating hand H comes into contact with the fixed section 6.This allows the driver, when operating the actuating unit 5, to feel the difference in displacement between the actuating unit 5 and the fixed section 6 simultaneously, since their operating hand H comes into contact with both the actuating unit 5 and the fixed section 6. This enables them to adjust the frictional force between the actuating unit 5 and their operating hand H, allowing them to operate the actuating unit 5 appropriately and smoothly. This makes it easy, for example, to easily achieve the actions of turning the wheel forward and turning it backward, which are performed by fine-tuning the actuating unit 5.More precisely, since the fine adjustment of the actuating unit 5 can be easily carried out, excessive forward and reverse rotation are suppressed during the actuation of forward rotation and actuation of reverse rotation, and the actuation of forward rotation and actuation of reverse rotation can be carried out appropriately.

[0037] Furthermore, since the fixed section 6 is provided, it is possible to support part of the operating hand H by and against the fixed section 6, thus making it easy to hold the actuating unit 5. For example, steering hold operation, in which the actuating unit 5 is held at a predetermined angle, can also be easily performed. Since part of the operating hand H is also supported by the fixed section 6, it is possible to easily counteract vehicle vibrations and thereby suppress faulty actuation of the actuating unit 5 due to driving conditions and road surfaces.

[0038] In the present embodiment, the steering actuation input element 31 has a rotary shaft 52 that rotates about an axis (the axis of rotation Z), and the steering actuation input element 31 is configured such that the actuating hand H can come into contact with the actuating unit 5 from one end face of the rotary shaft 52 in the axial direction of the rotary shaft 52. The actuating unit 5 is the rotary knob 51, which is provided on one end face of the rotary shaft 52 in the axial direction of the rotary shaft 52 and rotates with the rotary shaft 52 as its axis of rotation. The fixed section 6 is provided on the other end face of the rotary shaft 52 with respect to the rotary knob 51 in the axial direction of the rotary shaft 52.

[0039] As described above, in the present embodiment the rotary knob 51 of the actuating unit 5 is provided on one end face of the rotating shaft 52, while the fixed section 6 is provided at the other end of the rotating shaft 52. Therefore, by adjusting the friction between the rotary knob 51 on one end face and the actuating hand H, while gripping the fixed section 6 on the other end face, the steering hold operation, in particular, can be carried out more easily.

[0040] In the present embodiment, if a radial direction is defined as the radial direction with respect to the rotating shaft 52, the rotary knob 51 and the fixed section 6 (the support section 62) are designed such that they extend outwards in the radial direction of the rotating shaft 52, and the fixed section 6 (the support section 62) has essentially the same shape as the rotary knob 51.

[0041] As described above, in the present embodiment, the rotary knob 51 and the support section 62 of the fixed section 6 have essentially the same shape. Therefore, the operating hand H can come into contact with the rotary knob 51 and the support section 62 of the fixed section 6 via the rotary knob 51 and the support section 62 of the fixed section 6. The operating hand H can thus easily make contact with the rotary knob 51 and the fixed section 6, and the operating hand H can easily feel the friction between the operating hand H and the rotary knob 51. This makes it easier to perform the operation of the forward and reverse rotation, which is achieved by fine-tuning the rotary knob 51, as well as the steering hold operation, in which the rotary knob 51 is held (fixed) at a predetermined angle.

[0042] In the present embodiment, the surface roughness of the outer surface of the fixed section 6 (the support section 62), with which the driver's operating hand H comes into contact, differs from the surface roughness of the outer surface of the actuating unit 5 (the rotary knob 51), with which the driver's operating hand H comes into contact.

[0043] As described above, in the present embodiment the surface roughness of the outer surface of the support section 62 of the fixed section 6 differs from the surface roughness of the outer surface of the rotary knob 51. Therefore, it is possible to easily feel a difference in friction between the rotary knob 51 and the support section 62 of the fixed section 6, which further improves operability.

[0044] In the present embodiment, the surface roughness of the outer surface (in particular the actuating surface 512) of the actuating unit 5 (the rotary knob 51) is designed to be relatively rough compared to the surface roughness of the outer surface of the support section 62 of the fixed section 6.

[0045] As described above, in the present embodiment, the surface roughness of the outer surface of the rotary knob 51, in particular the surface roughness of the actuating surface 512, is set rougher than the surface roughness of the outer surface of the support section 62 of the fixed section 6. Therefore, when the rotary knob 51 is actuated, the operating hand H can easily be hooked onto the actuating surface 512 of the rotary knob 51, which further improves the operability of the rotary knob 51. Since the operating hand H can easily be hooked onto the actuating surface 512 of the rotary knob 51, the friction between the operating hand H and the rotary knob 51 is increased, which improves the operability of the steering lock actuation. [Second embodiment]

[0046] The Fig. 5, Fig. 6, Fig. 7 to Fig. Figure 8 shows a second embodiment in which a steering actuation input device 1 according to the present invention is applied to the steer-by-wire steering device SD. In the second embodiment, mainly a configuration or structure of the fixed section 6 of the steering actuation input element 31 of the first embodiment is modified. Since the basic configuration (structure) or component is identical to that of the first embodiment, except for the modification mentioned above, the same configuration (structure) or component is designated by the same reference numeral, and its detailed description is omitted here.

[0047] Fig. Figure 5 is a perspective view of a steering actuation input element 32 according to the second embodiment of the present invention, seen from the driver's side (rear). To simplify the following description, a rotation axis of the rotary knob 51 is shown in Fig. 5 is designated as the axis of rotation Z. A direction along the axis of rotation Z is called the "axial direction," a direction orthogonal to the axis of rotation Z is called the "radial direction," and a direction of rotation around the axis of rotation Z is called the "circumferential direction." Furthermore, the direction of travel of the vehicle is called the "front," the side opposite the direction of travel is called the "rear," the top side in a vertical direction is called the "top," and the bottom side in a vertical direction is called the "bottom."

[0048] For example, in Fig. As shown in Figure 5, in the steering actuation input element 32 according to the present embodiment, the fixed section 6 is provided on one axial end face and the other axial end face of the rotary knob 51. That is, in addition to the flange section 61 and the support section 62 of the first embodiment, the steering actuation input element 32 comprises a fastening section 63, which is provided on an axial end face beyond and above the rotary knob 51.

[0049] The mounting section 63 is teardrop-shaped in plan view. More precisely, the mounting section 63 has an arcuate section 631 formed on one side located radially close to the rotary knob 51, and a conical section 632 that is integral with the arcuate section 631 and extends radially away from the rotary knob 51. The arcuate section 631 has an arc shape concentric with the rotary knob 51 and an outer diameter slightly smaller than that of the rotary knob 51. The arcuate section 631 is designed such that the actuating surface 512 of the rotary knob 51 is positioned on a radial outer side relative to the arcuate section 631 in plan view. The conical section 632 has a conical shape that tapers as it diverges radially from the arcuate section 631.The conical section 632 is designed such that its tip section is located on the radial outside of the rotary knob 51 in a top view. The mounting section 63 is supported on the flange section 61 by a column section 64, which extends vertically upwards from the flange section 61 and is connected to the tip section of the conical section 632. That is, the column section 64 can bear the load of the operating hand H acting on the mounting section 63.

[0050] Fig. 6 is another example of the in Fig. 5 shows the mounting section 63 and the column section 64, which shows a cross-section of the steering actuation input element 32 along the axis of rotation Z. Mounting section 63 and column section 64 could be replaced by the one shown in Figure 5. Fig. 5. Mounting section 63 and column section 64 shown have a configuration or structure as shown in Fig. 6 can be used. That is, the one in Fig. The mounting section 63 shown in Figure 6 has a circular section 633 configured to have substantially the same diameter as the rotary knob 51. The circular section 633 has an outer diameter that is slightly smaller than that of the rotary knob 51. The circular section 633 is configured such that, in a top view, the actuating surface 512 of the rotary knob 51 is positioned on a radial outer surface relative to the circular section 633. The column section 64 is arranged coaxially with the rotary shaft 52, so that it passes through the interior of the hollow rotary shaft 52. The hollow rotary shaft 52 is rotatably supported by a pair of upper and lower bearings BG, which are provided in a substantially tubular housing 40 that covers the reaction force unit 4.The column section 64 is attached to the other axial end face of the housing 40 by any fastener, for example one or more screws (not shown). With this configuration or structure, the column section 64 can bear the load of the operating hand H acting on the fastening section 63. (Description of the operating mode of the steering actuation input device)

[0051] Fig. 7 is a perspective view of the in Fig. Figure 5 shows the steering actuation input element 32, viewed from its front, which illustrates an operating mode of the steering actuation input element 32, actuated by the operating hand H. An example of the operating mode of the steering actuation input element 32 is described below.

[0052] For example, in Fig. Figure 7 illustrates the actuation mode of the steering actuation input element 32 by the actuating hand H. In a state where the palm of the actuating hand H rests on the mounting section 63 and the thumb F1, the third finger (ring finger) F4, and the little finger F5 of the actuating hand H are in contact with the support section 62, the index finger F2 and the middle finger F3 of the actuating hand H are hooked onto the actuating surface 512 of the rotary knob 51. This state is a basic position for actuating the steering actuation input element 32.

[0053] Here, particularly in the present embodiment, the fastening section 63 of the fixed section 6 is not intended to fix the palm of the operating hand H during the steering operation described below, but merely to support the operating hand H placed upon it. In other words, during steering operation, the palm of the operating hand H can slide along the fastening section 63 to facilitate the operation of the rotary knob 51 with the index finger F2 and / or the middle finger F3 of the operating hand H, while sensing a difference in the displacement of the rotary knob 51 corresponding to the operation with the index finger F2 and / or the middle finger F3 of the operating hand H. (Description of the actuation method of the steering actuation input device)

[0054] The Fig. 8A to 8C are top views of the in Fig. 5 shown steering actuation input element 32, which show the operating modes of the steering actuation input element 32. Fig. 8A shows the straight-ahead state (driving straight ahead) (including right and left steering states with small steering angles). Fig. 8B shows a right-hand drive condition with a large steering angle. Fig. 8C indicates a left-hand drive condition with a large steering angle.

[0055] For example, when the vehicle is traveling straight ahead, as in Fig. As shown in Figure 8A, the pads (fleshy parts) of the index finger F2 and middle finger F3 of the operating hand H are hooked onto the front of the actuating surface 512 of the rotary knob 51, while the palm of the operating hand H is placed on the mounting section 63, with the thumb F1, ring finger F4, and little finger F5 of the operating hand H in contact with the support section 62. This holds the rotary knob 51 in a neutral position by the index finger F2 and middle finger F3 of the operating hand H.

[0056] In the case of a relatively small right-hand steering action, i.e., a so-called right-hand steering action with a small steering angle, the rotary knob 51 is turned clockwise by moving the index finger F2 of the operating hand H, which is hooked onto the actuating surface 512, so that it is pulled and rotated by the index finger F2, and the right-hand steering with a small steering angle is executed. Conversely, in the case of a relatively small left-hand steering action, i.e., a so-called left-hand steering action with a small steering angle, the rotary knob 51 is turned counterclockwise by moving the middle finger F3 of the operating hand H, which is hooked onto the actuating surface 512, so that it is pulled and rotated by the middle finger F3, and the left-hand steering with a small steering angle is executed.

[0057] In the case of a relatively large right-hand steering action, i.e., a so-called right-hand steering action with a large steering angle, as for example in Fig. As shown in 8B, the actuation is carried out by moving the actuating hand H horizontally to the right on the fastening section 63 from the in Fig. The basic position of the straight-ahead state shown in Figure 8A is shifted while the palm of the operating hand H is placed on the mounting section 63, with the thumb F1, ring finger F4, and little finger F5 of the operating hand H in contact with the support section 62, and by opening (moving) the index finger F2 of the operating hand H to the right to pull it towards the driver's side (i.e., rearward). This causes the rotary knob 51 to rotate in the right direction (clockwise) while being pulled by a side surface (a side surface on the side of the middle finger F3) of the index finger F2 of the operating hand H, and the right-hand steering with a large steering angle is executed.

[0058] With a relatively strong left-hand steering input, i.e., a so-called left-hand steering input with a large steering angle, as for example in Fig. As shown in 8C, the actuation is carried out by removing the actuating hand H from the in Fig. In the basic straight-ahead position shown in Figure 8A, the hand is moved horizontally to the left on the mounting section 63 while the palm of the operating hand H is placed on the mounting section 63, with the thumb F1, ring finger F4, and little finger F5 of the operating hand H in contact with the support section 62, and by opening (moving) the middle finger F3 of the operating hand H to the left to pull it towards the driver's side (i.e., rearward). This causes the rotary knob 51 to rotate to the left (counterclockwise) while being pulled by a side surface (a side surface on the side of the index finger F2) of the middle finger F3 of the operating hand H, and the left-hand steering with a large steering angle is executed. (Activation and effects of the present embodiment)

[0059] As described above, in the present embodiment, the steering actuation input element 32 has a rotating shaft 52 that rotates about the axis, and the steering actuation input element 32 is configured such that the actuating hand H can come into contact with the actuating unit 5 from an end face of the rotating shaft 52 in the axial direction of the rotating shaft 52. The actuating unit 5 is the rotary knob 51, which is provided on an end face of the rotating shaft 52 in the axial direction of the rotating shaft 52 and rotates with the rotating shaft 52 as its axis of rotation. The fixed section 6 (the mounting section 63) is provided on an end face of the rotating shaft 52 beyond the rotary knob 51 in the axial direction of the rotating shaft 52.

[0060] As described above, in the present embodiment, the mounting section 63, which forms part of the fixed section 6, is provided on one axial end face of the rotary shaft 52 beyond the rotary knob 51, which forms the actuating unit 5. Therefore, it is possible to actuate the rotary knob 51 with the operating hand H, while the operating hand H is supported by the palm of the hand resting on the mounting section 63. This makes it possible to actuate the rotary knob 51 without supporting the operating hand H with the support section 62, as in the first embodiment. This reduces fatigue when operating the rotary knob 51 and improves the operability of the steering actuation input element 32. In other words, in the present embodiment, the mounting section 63 provides support for the operating hand H, while the support section 62 prevents the fingers (e.g.,The thumb (F1), ring finger (F4), and little finger (F5) of the operating hand H are enabled to feel the friction associated with the rotation of the rotary knob 51, which contributes to the fine adjustment of the rotary knob 51. The same ease of use as in the first embodiment can be ensured, while at the same time reducing fatigue in the operating hand H.

[0061] Furthermore, according to the present embodiment, when performing a steering operation with a relatively large steering angle, i.e., when performing a so-called large steering angle operation, the movable area of ​​the operating hand H (each of the fingers F1 to F5) is extended by sliding the palm of the operating hand H on the mounting section 63. Therefore, it is possible to perform the large steering angle operation easily. [Third embodiment]

[0062] The Fig. 9, Fig. 10 to Fig. Figure 11 shows a third embodiment in which a steering actuation input device 1 according to the present invention is applied to the steer-by-wire steering device SD. In the third embodiment, mainly a configuration or structure of the steering actuation input element 31 of the first embodiment is modified. Since the basic configuration (structure) or component is the same as that of the first embodiment, except for the modification mentioned above, the same configuration (structure) or component is designated by the same reference numeral, and its detailed description is omitted here.

[0063] Fig. Figure 9 is a perspective view of a steering actuation input element 33 according to the third embodiment of the present invention, seen from the driver's side (rear). To simplify the following description, a rotation axis of the rotary knob 51 is shown in Fig. 9 is designated as the axis of rotation Z. A direction along the axis of rotation Z is called the "axial direction," a direction orthogonal to the axis of rotation Z is called the "radial direction," and a direction of rotation around the axis of rotation Z is called the "circumferential direction." Furthermore, the direction of travel of the vehicle is referred to as "front," the side opposite the direction of travel is referred to as "rear," the top side in a vertical direction is referred to as "top," and the bottom side in a vertical direction is referred to as "bottom."

[0064] For example, as in Fig. Figure 9 shows that, in the steering actuation input element 33 according to the present embodiment, an upper section (an axial end face) of the rotary knob 51 is hemispherical. Furthermore, three arms, namely a first arm 531, a second arm 532, and a third arm 533, which each extend along the radial direction of the rotary knob 51, are provided on the radial side sections of the rotary knob 51 at substantially regular intervals (120° intervals) in the circumferential direction of the rotary knob 51.

[0065] The first arm 531 and the second arm 532 are arranged in positions that are symmetrical with respect to the axis of rotation Z of the rotary knob 51 when the rotary knob 51 is in its neutral position. More precisely, since the first arm 531 and the second arm 532 are arranged circumferentially at a distance of 120°, the first arm 531 is located at a position 60° clockwise from the neutral position of the rotary knob 51. Similarly, the second arm 532 is located at a position 60° counterclockwise from the neutral position of the rotary knob 51. The third arm 533 is located at a regular distance (120° distance) from the first arm 531 and the second arm 532 in the circumferential direction, i.e. in a position of 180° from the neutral position of the rotary knob 51 in the right or left direction (clockwise or counterclockwise).

[0066] Furthermore, the first arm 531, the second arm 532, and the third arm 533 are each provided at their tip end sections (end sections on the sides facing away from the rotary knob 51) with a first sphere 541, a second sphere 542, and a third sphere 543, respectively, each having a spherical shape of the same size. These first sphere 541, second sphere 542, and third sphere 543 are arranged such that they project upwards from the respective tip end sections of the first arm 531, the second arm 532, and the third arm 533. Moreover, the first sphere 541, the second sphere 542, and the third sphere 543 are each shaped such that they have an outer diameter that is larger than the width dimensions of the first arm 531, the second arm 532, and the third arm 533, respectively, and smaller than the outer diameter of the rotary knob 51.

[0067] Furthermore, in the present embodiment, the fixed section 6 is provided on a radial outside with respect to the rotary knob 51, more precisely on a radial outside with respect to the tip end sections of the first arm 531, the second arm 532 and the third arm 533. That is to say, the fixed section 6 according to the present embodiment has an annular section 65 which is formed into a substantially ring-shaped form on the radial outside with respect to the tip end sections of the first arm 531, the second arm 532 and the third arm 533, wherein a first column section 661 and a second column section 662 each extend downwards from the annular section 65, which are connected to the actuating base 30 and support the annular section 65.

[0068] The ring section 65 is arranged in a predetermined height position, in the present embodiment essentially at the same height position as the first arm 531, the second arm 532, and the third arm 533 in the axial direction. In other words, the ring section 65 is arranged so that it is opposite the first arm 531, the second arm 532, and the third arm 533 in the radial direction. It should be noted that the ring section 65 is arranged so that it is spaced away from the first arm 531, the second arm 532, the third arm 533, the first sphere 541, the second sphere 542, and the third sphere 543, so that these do not interfere with the ring section 65. The first column section 661 and the second column section 662 are arranged at substantially regular intervals in the circumferential direction of the ring section 65.The first column section 661 and the second column section 662 are each formed as separate components from the ring section 65. They are located at intervals of 180° around the circumference of the ring section 65 and are symmetrical with respect to the axis of rotation Z of the rotary knob 51. (Description of the operating mode of the steering actuation input device)

[0069] Fig. 10 is a perspective view of the in Fig. Figure 9 shows the steering actuation input element 33, viewed from its front, which illustrates an actuation mode of the steering actuation input element 33, actuated by the actuating hand H. An example of the actuation mode of the steering actuation input element 33 is described below.

[0070] For example, in Fig. Figure 10 illustrates the actuation mode of the steering actuation input element 33 of the steering actuation input device 1 by the operating hand H. In a state where the palm (thenar eminence and / or hypothenar eminence) and fingers F1 to F5 of the operating hand H are placed on the ring section 65, the third ball 543 is held in the neutral position by the palm of the operating hand H. This state is a basic position for actuating the steering actuation input element 33. If, at this time, the first ball 541 is held by the thumb F1 and index finger F2 of the operating hand H such that the first ball 541 is clamped between the thumb F1 and index finger F2, the rotary knob 51 can be held more easily in the neutral position. Furthermore, at this time the second ball 542 can be held between the ring finger F4 and the little finger F5. (Description of the actuation method of the steering actuation input device)

[0071] The Fig. 11A to 11C are top views of the in Fig. Figure 9 shows the steering actuation input element 33, which shows the operating modes of the steering actuation input element 33. Fig. 11A shows a straight-ahead state (driving straight ahead) (including right and left steering states with small steering angles). Fig. Figure 11B shows a right-hand drive condition with a large steering angle. Fig. 11C shows a left-hand drive condition with a large steering angle.

[0072] When the vehicle is traveling straight ahead, as for example in Fig. As shown in Figure 11A, the index finger F2 of the operating hand H is hooked onto the first ball 541 and the ring finger F4 onto the second ball 542, while the third ball 543 is held by the palm of the operating hand H, with the palm and fingers F1 to F5 of the operating hand H in contact with the ring section 65. This holds the rotary knob 51 in the neutral position by the palm, index finger F2, and ring finger F4 of the operating hand H.

[0073] In the case of a relatively small right-hand steering action, i.e., a so-called right-hand steering action with a small steering angle, in the straight-ahead position, sliding the palm of the operating hand H to the left on the ring section 65 moves the third ball 543, held on the palm, to the left (rotating clockwise) in accordance with the sliding of the operating hand H, thus executing the right-hand steering action with a small steering angle. Alternatively, right-hand steering with a small steering angle can be performed by clamping the first ball 541 between the thumb F1 and index finger F2 and rotating the first ball 541 to the right (clockwise).

[0074] On the other hand, in the case of a relatively small left-hand steering action, i.e., a so-called left-hand steering action with a small steering angle, the third ball 543, which is held on the palm of the operating hand H, moves in the right direction (rotates counterclockwise) along the ring section 65 in the straight-ahead position by sliding the palm of the operating hand H in the right direction, and thus the left-hand steering with a small steering angle is executed. Alternatively, left-hand steering with a small steering angle could be performed by clamping the first ball 541 between the thumb F1 and index finger F2 and rotating the first ball 541 to the left (counterclockwise).

[0075] With a relatively strong right-hand steering action, i.e., a so-called right-hand steering action with a large steering angle, as for example in Fig. As shown in Figure 11B, in a state where the palm and fingers F1 to F5 of the operating hand H are in contact with the ring section 65, the index finger F2 is removed from the ring section 65 by a section of the first arm 531 located on the side of the second arm 532. Fig. The basic position of the straight-ahead state shown in 11A is engaged, and the index finger F2 is actuated (moved) so that the index finger F2 is pulled towards the driver's side (i.e., backwards). This causes the rotary knob 51, together with the first arm 531, to rotate significantly to the right (clockwise), and right-hand steering with a large steering angle is executed.

[0076] In the case of a relatively large left-hand steering action, i.e., a so-called left-hand steering action with a large steering angle, as for example in Fig. As shown in Figure 11C, in a state where the palm and fingers F1 to F5 of the operating hand H are in contact with the ring section 65, the ring finger F4 is disengaged from the ring section 65 by a section of the second arm 532 located on the side of the first arm 531. Fig. The basic position of the straight-ahead state shown in Figure 11A is engaged, and the ring finger F4 is actuated (moved) so that the ring finger F4 is pulled towards the driver's side (i.e., backwards). This causes the rotary knob 51, together with the second arm 532, to rotate significantly to the left (counterclockwise), and left-hand steering with a large steering angle is executed. (Activation and effects of the present embodiment)

[0077] As described above, in the present embodiment, the steering actuation input element 33 has a rotating shaft 52 that rotates about the axis, and the steering actuation input element 33 is configured such that the actuating hand H can come into contact with the actuating unit 5 from an end face of the rotating shaft 52 in the axial direction of the rotating shaft 52. The actuating unit 5 is the rotary knob 51, which is provided on an end face of the rotating shaft 52 in the axial direction of the rotating shaft 52 and rotates with the rotating shaft 52 as its axis of rotation. The fixed section 6 (the annular section 65) is provided on the radial outer side with respect to the rotary knob 51, when the radial direction with respect to the rotating shaft 52 is defined as the radial direction.

[0078] As described above, in the present embodiment, the ring section 65, which mainly forms the fixed section 6, is located on the radial outer side opposite the rotary knob 51. Therefore, it is possible to operate the rotary knob 51 with the operating hand H while the palm of the operating hand rests on the ring section 65. This makes it possible to operate the rotary knob 51 without supporting the operating hand H with the support section 62, as in the first embodiment. This reduces fatigue when operating the rotary knob 51 and improves the operability of the steering control input element 33.

[0079] Furthermore, according to the present embodiment, when performing a steering operation with a relatively large steering angle, i.e., when performing a so-called large steering angle operation, the movable section of the operating hand H (each of the fingers F1 to F5) is extended by sliding the palm of the operating hand H on the ring section 65. Therefore, it is possible to perform the large steering angle operation easily.

[0080] The present invention is not limited to the configurations and components shown by way of example in the above embodiments and can be freely modified according to the specifications, costs, etc., of the steering actuation input device 1 (the steer-by-wire steering device SD) to which the present invention is applied, as long as the configuration can achieve the actuations and effects of the present invention described above. For example, the actuation unit 5 can be configured as a so-called joystick with respect to the steering actuation input element 3, in which the rotary shaft 52 can be tilted in the radial direction, instead of the rotating body such as the rotary knob 51 in the above embodiments. Furthermore, although specific illustrations have been omitted, the steering actuation input devices 31 to 33 can be mounted, for example, on a dashboard in the vehicle interior, a door of the vehicle (e.g.,a driver's door armrest) and a seat of the vehicle (e.g., a driver's seat armrest), instead of on the center console in the vehicle interior.

[0081] Furthermore, to improve the operability of the steering actuation input device 1, it is conceivable to enable fine adjustment of the steering angle, for example by setting a hysteresis in the operating range of large steering angles. However, in this case, the technical problem arises that operability is impaired when actuating in an operating range other than that of large steering angles. Therefore, in the present invention, by providing the fixed section 6, it is possible to finely adjust the steering angle even in an operating range that cannot be covered by the aforementioned hysteresis setting, using the fixed section 6. Description of the reference symbols 1 Steering actuation input device 31, 32, 33 Steering actuation input element 4 reaction force unit 5 Actuating unit 51 Rotary knob 52 Rotary shaft 6 fixed section SD steer-by-wire steering device Z axis of rotation QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2020-172135

[0004]

Claims

[1] Steering actuation input device comprising: a steering input element that inputs the driver's steering input; and a reaction force unit configured to exert a reaction force in a direction in which the steering actuation input element is returned to a neutral position, the steering actuation input element includes: an actuating unit that is activated when a steering angle is applied to the wheels of a vehicle; and a fixed section that is fixed in a position different from the actuating unit and does not move in response to the driver's steering input, wherein the fixed section is constructed in such a way that, during the operation of the operating unit by the driver, the operating hand of the driver comes into contact with the fixed section. [2] Steering actuation input device according to claim 1, wherein the steering actuation input element has a rotating shaft that rotates about an axis, and the steering actuation input element is configured such that the actuating hand can come into contact with the actuating unit from an end face of the rotating shaft in the axial direction of the rotating shaft, The actuating unit is a rotary knob that is provided on the end face of the rotating shaft in the axial direction of the rotating shaft and rotates with the rotating shaft as its axis of rotation, and the fixed section is provided on the other end face of the rotary shaft in relation to the rotary knob in the axial direction of the rotary shaft. [3] Steering actuation input device according to claim 1, wherein If a radial direction is defined as a radial direction with respect to the rotating shaft, the rotary knob and the fixed section are designed such that they extend outwards in the radial direction of the rotating shaft, and the fixed section has essentially the same shape as the rotary knob. [4] Steering actuation input device according to claim 1, wherein the surface roughness of an outer surface of the fixed section with which the driver's actuating hand comes into contact differs from the surface roughness of an outer surface of the actuating unit with which the driver's actuating hand H comes into contact. [5] Steering actuation input device according to claim 1, wherein the surface roughness of an outer surface of the actuation unit is designed to be relatively rough compared to the surface roughness of an outer surface of the solid section. [6] Steering actuation input device according to claim 1, wherein The steering actuation input element has a rotating shaft that rotates about an axis, and the steering actuation input element is configured so that the actuating hand can come into contact with the actuating unit from an end face of the rotating shaft in the axial direction of the rotating shaft. The actuating unit is a rotary knob that is provided on an end face of the rotating shaft in the axial direction of the rotating shaft and rotates with the rotating shaft as its axis of rotation, and wherein the fixed section is provided on one end face of the rotary shaft beyond the rotary knob in the axial direction of the rotary shaft. [7] Steering actuation input device according to claim 1, wherein wherein the steering actuation input element has a rotating shaft which rotates about an axis, and the steering actuation input element is configured such that the actuating hand can come into contact with the actuating unit from an end face of the rotating shaft in the axial direction of the rotating shaft, wherein the actuating unit is a rotary knob which is provided on an end face of the rotating shaft in the axial direction of the rotating shaft and rotates with the rotating shaft as its axis of rotation, and wherein the fixed section is provided on a radial outside with respect to the rotary knob, if a radial direction with respect to the rotating shaft is defined as the radial direction. [8] Steer-by-wire steering device with the steering actuation input device according to any one of the preceding claims 1 to 7.

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