Active roll vehicle steering delayer
By designing a single spring delay and reset mechanism in an active roll vehicle, the delay transmission of steering angle and left-right steering characteristics are realized, which solves the problem of insufficient stability and safety of the vehicle in curve driving, and satisfies the satisfaction of satisfying the It has the requirements of simple structure, small size and good reliability.
Patent Information
- Application Number
- CN202421293183.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-06-07
AI Technical Summary
When actively rolling the vehicle, centrifugal force causes instantaneous impact on the human body, affecting the smoothness of driving and ride comfort. The existing technology is difficult to effectively solve the problems of vehicle steering delay and reset, resulting in stability and safety when driving in curves. Insufficient sex.
An active roll vehicle steering delayer is designed, using a single spring delay and reset mechanism. Through the elastic deformation and reset of the rectangular straight-piece spring, the delay transmission of the steering angle of the steering angle and the symmetry of the left and right steering characteristics are achieved to meet the continuous and Steering control requirements for fixed-term lengths.
It realizes the delay transmission of steering angle of the steering wheel and the symmetry of left and right steering characteristics, improves the stability and safety of the vehicle during curve driving, and meets the mass production requirements of simple structure, small size and good reliability.
Smart Images
Figure CN222310723U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a steering delay device for an active roll vehicle, belongs to the technical field of vehicle chassis, and particularly relates to a steering driving control technology for an active roll vehicle, and is applied to a roll control system for an active roll vehicle. Background Art
[0002] Active roll vehicles improve the stability, speed and safety of vehicles when driving on curves by controlling the degree of the vehicle's tilt toward the inside of the curve when turning. The vehicle's roll control system can automatically tilt the vehicle at a certain angle when turning to generate a balancing torque to resist the centrifugal force exerted on the vehicle, so as to maintain a stable driving posture for micro vehicles with small wheelbase or vehicles with a high center of gravity.
[0003] When a vehicle enters a curve, the instantaneous impact of centrifugal force on the human body will cause physical discomfort and other negative effects. On the basis of ensuring the safety of vehicle driving, in order to improve driving smoothness and ride comfort, the invention patent "Active Rolling Vehicle Steering Delay Device" CN2021106583117 proposes a relative motion rotation type steering delay device; the technical solution includes: the main shaft inputs the steering torque compression spring, overcomes the damping, forces the main shaft limit rod to contact a limit block of the cylinder, the cylinder transmits the torque to overcome the steering resistance to achieve vehicle steering, the elastic reset system returns to the middle position, the main shaft inputs the steering angle θ, and after the delay setting time ∆t, the cylinder outputs the same steering angle θ, the forward and reverse motion characteristics are the same, and the uniform, continuous, and timed long delay active rolling vehicle steering driving control requirements are met. Based on the above principles, the steering delay and reset mode with relative motion as rotation is retained, and a single spring delay and reset is developed, which has symmetrical left and right steering characteristics of the vehicle, meets the characteristics of simple structure, small size, and good reliability, and is suitable for mass production. Summary of the invention
[0004] The utility model aims to provide a steering delay device for an active roll vehicle, which adopts a single spring for delay and reset, realizes delayed transmission of steering wheel steering angle, symmetrical left and right steering characteristics, and is suitable for mass production requirements.
[0005] The technical solutions adopted to achieve the purpose of this utility model are as follows:
[0006] An active roll vehicle steering delay device comprises: an input sleeve (1) is provided with an input port (11) and a guide seat (13) in the radial direction, two limit rods (12) are provided on the same radius r to form a same rigid body moving part, an output sleeve (2) is provided with an output port (21) and a positioning seat (23) in the radial direction, a limit block (22) is provided on the same radius r to form another rigid body moving part, the input sleeve (1) and the output sleeve (2) are rotationally connected by a sliding bearing (3) and a rotation axis L, and both ends of the output sleeve (2) are rotationally connected to a support shaft (4) coaxially with the axis L through rolling bearings (6), thereby limiting the relative movement of the input sleeve (1), the output sleeve (2) and the support shaft (4) along the axial direction L;
[0007] The leaf spring (5) is a rectangular straight leaf spring. When the symmetric planes of the two limit rods (12) on the input sleeve (1) are coplanar with the symmetric plane of the upper limit block (22) of the output sleeve (2), the coincident plane M serves as the mid-plane of the leaf spring. M passes through the rotation axis L. One end of the leaf spring (5) is fixedly connected to the positioning seat (23) of the output sleeve (2) through a positioning pin (24). The clamping pin (14) presses the other end of the leaf spring (5) onto the guide seat (13) of the input sleeve (1), allowing the leaf spring (5) to have a slight displacement caused by elastic deformation relative to the guide seat (13). The clearances on both sides of the limit block (22) and the limit rod (12) are equal, and the clearance on one side is ∆θ, thereby forming an active roll vehicle steering delay device.
[0008] The support shaft (4) is fixed to the vehicle body, and the steering torque is inputted from the input port (11) of the input sleeve (1). The steering torque compresses the leaf spring (5) to bend and deform, and rotates relative to the output sleeve (2) around L. After the input sleeve (1) rotates by ∆θ, a limit rod (12) of the input sleeve (1) contacts the limit block (22) of the output sleeve (2), and the output sleeve (2) transmits the steering torque to overcome the steering resistance to realize vehicle steering. After the input sleeve (1) rotates by a given steering angle θ relative to the support shaft (4), the leaf spring (5) is elastically reset, and the system returns to the center plane. The output sleeve (2) rotates by θ relative to the support shaft (4), and the output port (21) outputs the steering angle θ. At the same time, the steering angle ∆θ corresponds to a delay time ∆t.
[0009] Since the leaf spring (5) is a rectangular straight leaf spring, the mid-plane of the leaf spring passes through the rotation axis L, the elastic deformation and reset performance parameters generated by the forward and reverse rotation around L are the same, the forward and reverse motion characteristics of the active roll vehicle steering delay device are the same, and the left and right steering characteristics of the vehicle are symmetrical; the time length ∆t is used to achieve a timed long delay, the leaf spring is elastically reset, the system returns to the mid-plane, waits for the next steering command, and ensures continuous steering delay work, and the active roll vehicle steering delay device meets the continuous, timed long delay active roll vehicle steering driving control requirements.
[0010] In the above-mentioned active roll vehicle steering delay device, the length direction of the leaf spring (5) is perpendicular to the rotation axis L. The leaf spring (5) is changed to be arranged in a manner that the length direction is parallel to the rotation axis L, so that the left and right steering characteristics of the vehicle are symmetrical and the requirements for continuous, timed and long-delayed active roll vehicle steering driving control are also met, thereby forming an active roll vehicle steering delay device.
[0011] In the above-mentioned active roll vehicle steering delay device, the leaf spring (5) is a rectangular straight leaf spring, which is composed of multiple layers of rectangular elastic metal sheets stacked together. The number of spring sheets is changed to adapt to different steering resistances, thereby realizing elastic reset and system return to the center plane function, having symmetrical left and right steering characteristics of the vehicle, and meeting the requirements of continuous, timed and long-delayed active roll vehicle steering control.
[0012] The beneficial effect of the utility model is that the proposed active roll vehicle steering delay device realizes the delayed transmission of the steering wheel steering angle and the symmetry of the left and right steering characteristics, meets the requirements of continuous and timed long-delay active roll vehicle steering driving control, and at the same time meets the requirements of simple structure, small size, good reliability, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a simplified diagram of a steering delay device for an active roll vehicle;
[0014] Figure 2 A schematic diagram of a steering delay device for an active roll vehicle;
[0015] Figure 3 This is the working principle diagram of the steering delay device of the active roll vehicle;
[0016] Figure 4 This is the three-dimensional principle diagram of the steering delay device for active roll vehicles;
[0017] Figure 5 It is a cross-sectional schematic diagram of the M plane of the steering delay device of the active roll vehicle;
[0018] Figure 6 Installation schematic diagram of leaf spring for active roll vehicle steering delay device;
[0019] Figure 7 This is the application principle diagram of the steering delay device for active roll vehicles;
[0020] In the figure: 1--input sleeve, 11--input port, 12--limit rod, 13--guide seat, 14--clamping pin, 2--output sleeve, 21--output port, 22--limit block, 23--locating seat, 24--locating pin, 3--sliding bearing, 4--support shaft, 5--leaf spring, 6--rolling bearing, 10--input joint, 20--output joint, 40--carriage. DETAILED DESCRIPTION
[0021] The embodiments of the present utility model are described below according to the accompanying drawings.
[0022] Figure 1 In the schematic diagram of the active roll vehicle steering delay device shown, Figure 1 (a) is a schematic cross-sectional view of an active roll vehicle steering delay device along a rotation axis, the active roll vehicle steering delay device comprising: an input sleeve (1) is provided with an input port (11) and a guide seat (13) in a radial direction, two limit rods (12) are provided on the same radius r to form a same rigid body moving part, an output sleeve (2) is provided with an output port (21) and a positioning seat (23) in a radial direction, a limit block (22) is provided on the same radius r to form another rigid body moving part, the input sleeve (1) and the output sleeve (2) are rotationally connected by a sliding bearing (3) and a rotation axis L, and both ends of the output sleeve (2) are rotationally connected to the support shaft (4) coaxially with the axis L through rolling bearings (6), limiting the relative movement of the input sleeve (1), the output sleeve (2) and the support shaft (4) along the axial direction L;
[0023] Figure 1 (b) is a schematic diagram of the arrangement of leaf springs of an active roll vehicle steering delay device along the N direction projection. The leaf spring (5) is a rectangular straight leaf spring. When the symmetric planes of the two limit rods (12) on the input sleeve (1) are coplanar with the symmetric plane of the upper limit block (22) of the output sleeve (2), the coincident plane M is used as the mid-plane of the leaf spring. M passes through the rotation axis L. One end of the leaf spring (5) is fixedly connected to the positioning seat (23) of the output sleeve (2) through a positioning pin (24). The clamping pin (14) presses the other end of the leaf spring (5) against the guide seat (13) of the input sleeve (1), allowing the leaf spring (5) to have a slight displacement caused by elastic deformation relative to the guide seat (13). The clearances on both sides of the limit block (22) and the limit rod (12) are equal, and the single-side clearance ∆θ>0, forming an active roll vehicle steering delay device, as shown in FIG. Figure 4 shown.
[0024] Figure 3The active roll vehicle steering delay device shown in the figure has a working principle diagram. In the active roll vehicle steering delay device, the support shaft (4) is fixed to the vehicle body. The steering torque is inputted through the input port (11) of the input sleeve (1). The steering torque compresses the leaf spring (5) to bend and deform, and rotates relative to the output sleeve (2) around L. After the input sleeve (1) rotates by ∆θ, a limit rod (12) of the input sleeve (1) contacts the limit block (22) of the output sleeve (2). The output sleeve (2) transmits the steering torque to overcome the steering resistance to realize vehicle steering. After the input sleeve (1) rotates by a given steering angle θ relative to the support shaft (4), the leaf spring (5) is elastically reset, and the system returns to the center plane. The output sleeve (2) rotates by θ relative to the support shaft (4), and the output port (21) outputs the steering angle θ. The steering angle ∆θ corresponds to the delay time ∆t.
[0025] Since the leaf spring (5) is a rectangular straight leaf spring, the mid-plane of the leaf spring passes through the rotation axis L, the elastic deformation and reset performance parameters generated by the forward and reverse rotation around L are the same, the forward and reverse motion characteristics of the active roll vehicle steering delay device are the same, and the left and right steering characteristics of the vehicle are symmetrical; the time length ∆t is used to achieve a timed long delay, the leaf spring is elastically reset, the system returns to the mid-plane, waits for the next steering command, and ensures continuous steering delay work, and the active roll vehicle steering delay device meets the continuous, timed long delay active roll vehicle steering driving control requirements.
[0026] for Figure 1 In the schematic diagram of the active roll vehicle steering delay device shown in FIG. 1 , the length direction of the leaf spring (5) is perpendicular to the rotation axis L. The leaf spring (5) is changed to be arranged in a manner that the length direction is parallel to the rotation axis L, so that the left and right steering characteristics of the vehicle are symmetrical and the requirements for continuous, timed and long-delayed active roll vehicle steering driving control are also met, forming an active roll vehicle steering delay device, such as Figure 2 shown.
[0027] Figure 5In the planar cross-sectional schematic diagram of the active roll vehicle steering delay device M shown in the figure, in the above-mentioned active roll vehicle steering delay device, the relative movement method between the input sleeve (1), the output sleeve (2) and the support shaft (4) along the rotation axis L is defined as follows: the inner cylindrical surface of the input sleeve (1) and the outer cylindrical surface of the sliding bearing (3) are interference fit, the inner cylindrical surface of the sliding bearing (3) and the outer cylindrical surface of the output sleeve (2) are clearance fit, and the outer cylindrical shoulder of the output sleeve (2) and a shaft elastic retaining ring (GB / T 894.1) limits the axial relative movement of the output sleeve (2) and the sliding bearing (3), that is, limits the relative movement of the input sleeve (1) and the output sleeve (2) along the axis L; the inner cylindrical surfaces at both ends of the output sleeve (2) are interference fit with the outer cylindrical surfaces of the two rolling bearings (6), the inner cylindrical surfaces of the rolling bearings (6) are transition fit with the outer cylindrical surface of the support shaft (4), and the axial relative movement of the rolling bearings (6) and the support shaft (4) is limited by the two outer cylindrical shoulders of the support shaft (4), that is, limits the relative movement of the output sleeve (2) and the support shaft (4) along the axis L; in the working process, there is no other external force acting along the axial direction except gravity, so the relative movement of the input sleeve (1), the output sleeve (2) and the support shaft (4) along the rotation axis L is limited.
[0028] Figure 6 The active roll vehicle steering delay leaf spring installation schematic diagram shown, where: Figure 6 (a) is the plane projection diagram of the active roll vehicle steering delay device M. Figure 6 (b) is a cross-sectional view of the steering delay device BB of the active roll vehicle. Figure 6 (c) is a cross-sectional view of the active roll vehicle steering delay device CC. In the active roll vehicle steering delay device, the leaf spring (5) is a rectangular straight leaf spring, which is composed of multiple layers of rectangular elastic metal sheets stacked together. The number of spring sheets is changed to adapt to different steering resistances, realize elastic reset and system return to the center plane function, have symmetrical left and right steering characteristics of the vehicle, and meet the requirements of continuous, timed and long-delayed active roll vehicle steering control. The rectangular elastic metal sheet is made of 65Mn or 60CrMn; Figure 6 The middle positioning pin (24) and the clamping pin (14) are both bolts, one bolt being used to fix one end of the leaf spring (5) to the positioning seat (23) of the output sleeve (2), and two bolts being used to press the other end of the leaf spring (5) against the guide seat (13) of the input sleeve (1) in a coaxial direction, allowing the leaf spring (5) to have a slight displacement caused by elastic deformation relative to the guide seat (13).
[0029] Figure 7The active roll vehicle steering delay device application schematic diagram is shown. The active roll vehicle steering delay device is connected in series in the vehicle steering system. The support shaft (4) is fixedly connected to the vehicle body (40). The active roll vehicle steering delay device is connected between the steering wheel and the steering gear. The steering wheel drives the input sleeve (1) to input the steering angle θ through the input port (11). After the delay setting time ∆t, the output sleeve (2) outputs the same steering angle θ. The output port (21) is connected to the input shaft of the steering gear to execute the steering angle θ. The steering gear drives the steering mechanism to realize the vehicle steering. The forward and reverse motion characteristics during the steering process are The active roll vehicle steering delay device is connected between the steering gear and the steering mechanism. A rack and pinion steering gear is selected. The input joint (10) is connected to the input port (11) of the input sleeve (1) by a ball hinge. The output joint (20) is connected to the output port (21) of the output sleeve (2) by a ball hinge. The steering gear output shaft drives the input sleeve (1) to input a steering angle θ through the input joint (10). After a delay setting time ∆t, the output sleeve (2) outputs the same steering angle θ, and the steering mechanism is driven by the output joint (20) to achieve vehicle steering. The forward and reverse motion characteristics during the steering process are the same.
Claims
1. Active roll vehicle steering delay device, characterized in that: include: An input port and a guide seat are radially arranged on the input sleeve, and two limit rods are arranged on the same radius r to form a same rigid body moving part. An output port and a positioning seat are radially arranged on the output sleeve, and a limit block is arranged on the same radius r to form another rigid body moving part. The input sleeve and the output sleeve are rotationally connected by a sliding bearing and a rotation axis L. The two ends of the output sleeve are rotationally connected with the support shaft coaxially L through rolling bearings, limiting the relative movement of the input sleeve, the output sleeve and the support shaft along the axial direction of L. The leaf spring is a rectangular straight leaf spring. When the symmetry planes of the two limit rods on the input sleeve are coplanar with the symmetry plane of the upper limit block of the output sleeve, the overlapping plane is used as the mid-plane of the leaf spring. One end of the leaf spring is fixedly connected to the locating seat of the output sleeve through a locating pin. The clamping pin presses the other end of the leaf spring against the guide seat of the input sleeve, allowing the leaf spring to have a slight displacement caused by elastic deformation relative to the guide seat. The gaps on both sides of the limit block and the limit rod are equal, and the single-side gap is ∆θ.
2. The active roll vehicle steering delay device according to claim 1, characterized in that: The support shaft is fixed to the vehicle body, and the steering torque is input from the input port of the input sleeve. The steering torque compresses the leaf spring to bend and deform, and rotates relative to the output sleeve around L. After the input sleeve rotates by ∆θ, a limit rod of the input sleeve contacts the limit block of the output sleeve, and the output sleeve transmits the steering torque to overcome the steering resistance to realize vehicle steering. After the input sleeve rotates by a given steering angle θ relative to the support shaft, the leaf spring elastically resets and the system returns to the center plane. The output sleeve rotates by θ relative to the support shaft, and the output port outputs the steering angle θ. At the same time, the steering angle ∆θ corresponds to the delay time ∆t, and the forward and reverse motion characteristics are the same.
3. The active roll vehicle steering delay device according to claim 1, characterized in that: The leaf spring length direction is perpendicular to the rotation axis L, which is changed to be arranged in parallel with the rotation axis L, so that the left and right steering characteristics of the vehicle are symmetrical, and the requirements of continuous, timed and long-delay active roll vehicle steering control are also met.
4. The active roll vehicle steering delay device according to claim 1, characterized in that: The leaf spring is composed of multiple layers of rectangular elastic metal sheets stacked together. The number of spring sheets is changed to adapt to different steering resistances and meet the functions of elastic reset and system return to the center plane.