Steering-by-wire hand feeling and hand force simulation limiting mechanism

Abstract

The utility model relates to the technical field of automobile steer-by-wire, and discloses a steer-by-wire hand feeling and hand force simulation limiting mechanism, which comprises a PPK assembly and a tubular column assembly, a limiting mechanism assembly is arranged outside the tubular column assembly, a tubular column spline shaft is assembled inside the tubular column assembly, and the tubular column spline shaft is connected with the PPK assembly. The limiting mechanism assembly comprises a shell assembled outside the tubular column assembly, an internal spline connecting lead screw is assembled at the end, located in the shell, of a tubular column spline shaft, the outer portion of the internal spline connecting lead screw is in threaded connection with an I-shaped nut, a sliding groove is formed in the I-shaped nut, and the sliding groove is in threaded connection with the inner spline connecting lead screw. And an insert is fixedly connected to the inner wall of the shell, the insert is slidably connected to the interior of the sliding groove, and a spring is arranged on the side wall of the I-shaped nut. The steering-by-wire hand feeling and hand force simulation limiting mechanism limits the rotation angle of a steering wheel, so that unlimited rotation of left and right steering is protected, and the situation that other parts are abnormal and damaged due to the fact that the rotation angle of the steering wheel exceeds the limit is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wire-controlled steering, in particular to a wire-controlled steering feel and hand force simulation limiting mechanism. Background Art

[0002] Compared with traditional steering systems, the steer-by-wire system eliminates the intermediate connecting shaft, saves space for cockpit layout, and eliminates hard connections. Steering can be completed by connecting the steering line. The steer-by-wire system is part of the entire vehicle. The controller of the steer-by-wire system can exchange and share data with other controllers of the vehicle. Therefore, the steering controller can obtain the overall motion state of the vehicle and comprehensively improve the vehicle's handling stability through algorithm optimization.

[0003] At present, the disadvantages of the wire-controlled steering system are that there is no hard connection, resulting in false feedback, insufficient road feel, and redundant equipment leading to additional cost and weight. Therefore, a wire-controlled steering feel and hand force simulation limit mechanism is urgently needed to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a wire-controlled steering feel and hand force simulation limit mechanism, which has the advantages of limiting the number of steering wheel rotation circles and angles for left and right steering of the wire-controlled steering system, and solves the problem that the disadvantage of the wire-controlled steering system is that the lack of hard connection leads to relatively false feedback and insufficient road feel.

[0006] (II) Technical solution

[0007] The utility model provides a technical solution to the above-mentioned technical problems as follows: a steering-by-wire feel and force simulation limit mechanism, comprising a PPK assembly and a column assembly, the column assembly is provided with a limit mechanism assembly on the outside, the column assembly is provided with a column spline shaft on the inside, the limit mechanism assembly comprises a shell assembled on the outside of the column assembly, the column spline shaft is provided with an internal spline connecting screw at one end located inside the shell, the external thread of the internal spline connecting screw is connected with an I-nut, a slide groove is provided inside the I-nut, an insert is fixedly connected to the inner wall of the shell, the insert is slidably connected to the inside of the slide groove, and a spring is provided on the side wall of the I-nut.

[0008] The beneficial effects of the utility model are:

[0009] The hand force simulation limit mechanism of the wire-controlled steering can limit the rotation angle of the steering wheel to protect the unlimited rotation of the left and right steering, avoid the abnormality and damage of other parts caused by the excessive rotation angle of the steering wheel, have good structural stability, low noise, easy assembly, and easy to adjust the left and right limit angles.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, an adjusting nut is assembled inside the shell, an internal rotating disk of the adjusting nut is provided with a bearing, an external fixed connection of the internal spline connecting lead screw is provided with a bearing sleeve, and the bearing sleeve is rotatably connected to the adjusting nut via the bearing.

[0012] The beneficial effect of adopting the above further solution is that the rotation stability of the internal spline connection screw is improved by arranging the bearing.

[0013] Furthermore, a blocking nut is provided on the outside of the adjusting nut.

[0014] The beneficial effect of adopting the above further solution is that the sealing performance is improved by providing the plugging cover nut.

[0015] Furthermore, the number of the springs is two, and the two springs are respectively arranged on two sides of the I-shaped nut.

[0016] The beneficial effect of adopting the above further solution is that, by setting two springs, force feedback is simulated to enhance the hand feel.

[0017] Furthermore, the PPK assembly is installed outside the column assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the exploded structure of the utility model.

[0021] In the figure: 1. PPK assembly; 2. Column assembly; 3. Limiting mechanism assembly; 4. Column spline shaft; 5. Housing; 6. I-beam nut; 7. Bearing sleeve; 8. Cover nut; 9. Internal spline connecting screw; 10. Spring; 11. Bearing; 12. Adjusting nut; 13. Insert. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the embodiment, Figure 1-3 A limit mechanism for simulating the hand force of a wire-controlled steering feel is provided. The utility model comprises a PPK assembly 1 and a column assembly 2. A limit mechanism assembly 3 is arranged outside the column assembly 2. A column spline shaft 4 is assembled inside the column assembly 2. The limit mechanism assembly 3 comprises a shell 5 assembled on the outside of the column assembly 2. An end of the column spline shaft 4 located inside the shell 5 is assembled with an internal spline connecting screw 9. The external thread of the internal spline connecting screw 9 is connected with an I-shaped nut 6. A slide groove is opened inside the I-shaped nut 6. An insert 13 is fixedly connected to the inner wall of the shell 5. The insert 13 is slidably connected to the inside of the slide groove. A spring 10 is arranged on the side wall of the I-shaped nut 6.

[0024] Specifically, refer to Figure 2 An adjusting nut 12 is assembled inside the housing 5, and a bearing 11 is provided on the internal turntable of the adjusting nut 12. A bearing sleeve 7 is fixedly connected to the outside of the internal spline connection screw 9. The bearing sleeve 7 is rotatably connected to the adjusting nut 12 through the bearing 11. The rotation stability of the internal spline connection screw 9 is improved by providing the bearing 11.

[0025] The outside of the adjusting nut 12 is provided with a plugging nut 8, and the plugging nut 8 is provided to improve the sealing performance.

[0026] In this embodiment, in actual use, the number of springs 10 is two, and the two springs 10 are respectively arranged on both sides of the I-nut 6. By setting two springs 10, force feedback is simulated and the hand feel is increased. The PPK assembly 1 is assembled and arranged on the outside of the column assembly 2.

[0027] In this embodiment, in actual use, the internal spline connecting screw 9 is connected to the column spline shaft 4, the housing 5 is locked, and the I-nut 6 is installed on the internal spline connecting screw 9. The insert 13 inside the housing 5 limits the up and down rotational movement of the I-nut 6 so that it can only move axially. After the internal spline connecting screw 9 rotates a certain angle, the I-nut 6 reaches the upper and lower limit positions and cannot move, thereby limiting the rotation of the steering wheel.

[0028] In this embodiment, in actual use, springs 10 are added on both sides of the I-nut 6 to simulate force feedback and increase the hand feel. At the same time, the adjusting nut 12 at the tail is an integral whole with the bearing 11 and the bearing sleeve 7. By adjusting the nut 12, the limit angle can be adjusted slightly to ensure that the internal spline connecting screw 9 is stably connected with the column spline shaft 4, the housing 5 is locked, and the I-nut 6 is movable on the shaft to ensure that the limit angle is correct to limit the rotation angle of the steering wheel.

[0029] The steering wheel output shaft connection part is an internal spline connecting screw 9, which is provided with internal splines and positioning teeth. The internal spline connecting screw 9 and the steering wheel output shaft are relatively positioned so that when the steering wheel is in the middle position, the I-beam nut 6 is located in the middle position of the limit stroke, and the internal spline connecting screw 9 and the steering wheel output shaft are connected by interference fit.

[0030] The front end face of the internal spline connection screw 9 is the upper limit position, and the rear end passes through the bearing sleeve 7 and the bearing 11, and the inner ring of the bearing 11 is positioned and installed in the bearing sleeve 7.

[0031] The front end surface of the bearing sleeve 7 is the lower limit point. The bearing sleeve 7 is installed in the inner ring of the bearing 11, and the outer ring of the bearing 11 is installed in the adjusting nut 12.

[0032] The adjusting nut 12 is installed into the housing 5, and the thread can be screwed in to adjust the stroke up and down. The stroke limits the number of turns to the left and right. The stroke confirmation is the number of turns confirmation. The plugging nut 8 is threaded and fixed, and the hand feel simulates the specified angle value on the left side of the steering and the specified angle value on the right side of the steering.

[0033] After the adjusting nut 12 is installed into the housing 5 , the steering angle of the steering wheel can be adjusted by the adjusting nut 12 .

[0034] The spring 10 is installed one above and one below the I-nut 6. When the I-nut 6 rotates up and down, the spring acts as a supporting force. When turning left, the upward spring stretches and is subjected to tension, and the lower spring is compressed and subjected to pressure. When turning right, the upward spring is compressed and subjected to pressure, and the lower spring stretches and is subjected to tension.

[0035] The I-shaped nut 6 is installed on the internal spline connection screw 9, and the threads are screwed in between the two parts to move up and down. In order to avoid idle shaking, springs 10 are installed above and below the I-shaped nut 6. Inserts 13 are provided in the linear slide grooves on both sides of the I-shaped nut 6, and the inserts 13 will limit the rotation in the circumferential direction.

[0036] The insert 13 on the inner wall of the shell 5 cooperates with the sliding groove opened on the I-nut 6. After being assembled together, they slide linearly. The I-nut 6 is installed in the middle of the internal spline connecting screw 9 and moves up and down, contacting the internal spline connecting screw 9 and the end face of the bearing sleeve 7 and the limit lock (that is, turning to the left limit and the right limit).

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steering-by-wire feel hand force simulation limit mechanism, comprising a PPK assembly (1) and a column assembly (2), characterized in that: A limiting mechanism assembly (3) is arranged outside the pipe column assembly (2), and a pipe column spline shaft (4) is assembled inside the pipe column assembly (2). The limiting mechanism assembly (3) includes a shell (5) assembled outside the pipe column assembly (2), and one end of the pipe column spline shaft (4) located inside the shell (5) is assembled with an internal spline connecting screw (9), and the external thread of the internal spline connecting screw (9) is connected to an I-shaped nut (6), and a sliding groove is opened inside the I-shaped nut (6), and an insert (13) is fixedly connected to the inner wall of the shell (5), and the insert (13) is slidably connected to the inside of the sliding groove, and a spring (10) is arranged on the side wall of the I-shaped nut (6).

2. The steering-by-wire feel hand force simulation limit mechanism according to claim 1, characterized in that: The housing (5) is internally assembled with an adjusting nut (12), the internal rotating disk of the adjusting nut (12) is provided with a bearing (11), the external part of the internal spline connecting screw (9) is fixedly connected with a bearing sleeve (7), and the bearing sleeve (7) is rotatably connected to the adjusting nut (12) via the bearing (11).

3. The steering-by-wire feel hand force simulation limit mechanism according to claim 2, characterized in that: The outside of the adjusting nut (12) is provided with a blocking nut (8).

4. The steering-by-wire feel hand force simulation limit mechanism according to claim 1, characterized in that: The number of the springs (10) is two, and the two springs (10) are respectively arranged on both sides of the I-shaped nut (6).

5. The steering-by-wire feel hand force simulation limit mechanism according to claim 1, characterized in that: The PPK assembly (1) is assembled and arranged outside the column assembly (2).

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