Seat damping device self-adaptive to human body weight
Through the seat shock absorber that adapts to the human body weight, the pressure sensor and ECU controller combine with the magnetorheological damper and the motor to automatically adjust the damping force and spring position, the difficulty of matching parameters of traditional seat shock absorbers is solved and the seat's vibration damping comfort and safety is improved.
Patent Information
- Application Number
- CN202423111825.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-12-17
AI Technical Summary
The damping and spring parameters of traditional seat shock absorbers are difficult to automatically adjust, making it difficult to meet the needs of users with different weights.
The seat shock absorber that adapts to the weight of the human body is adopted, and the pressure sensor and ECU controller are combined with the magnetorheological damper and the motor to automatically adjust the damping force and spring position, optimize the vibration damping effect through the lever principle, and realize intelligent adjustment.
It realizes automatic adjustment of damping force and stiffness according to the weight of the human body, improves the vibration damping comfort and safety of the seat, reduces the difficulty of manual adjustment, and improves the automation and electrification of the seat.
Smart Images
Figure CN223169414U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of seats, and particularly relates to a seat shock absorption device adaptable to human body weight. Background Art
[0002] In recent years, with the popularization of intelligentization and electrification, end customers have put forward higher requirements for the automation and comfort of seats. The damping adjustment and stiffness adjustment of traditional spring shock absorbers are both manually adjusted, and the quality of the parameter matching between the spring and the damper directly affects the comfort of the shock absorber. It is very difficult for end customers to find the comfortable matching point between the spring and the damper. It is imperative to redesign an automatic matching damper and spring to adapt to people of different weights. With the continuous progress of technology and the continuous expansion of applications, the seat has become an important innovation in the modern engineering field with its excellent shock absorption performance, outstanding safety protection, control stability and humanized design concept. Summary of the Invention
[0003] The purpose of the utility model is to provide a seat shock absorption device that can adjust the damping force according to the human body weight and enables the occupants to have better comfort.
[0004] The purpose of the utility model is solved as follows:
[0005] A seat shock absorber device adapted to the weight of the human body, comprising an upper bracket and a lower bracket of the seat sitting part. The upper and lower brackets are supported by cross links arranged on both sides. The middle of each cross link on each side is hinged and connected through a hinge shaft. The ends of the cross link on one side are respectively hinged and connected to the upper and lower brackets, and the ends of the cross link on the other side are respectively slidably connected to the upper and lower brackets. A support plate is arranged on the cross link above the hinge shaft. The small end of the cone spring is slidably supported on the support plate through a steel ball. The large end of the cone spring is fixed to a cone spring fixing plate which is slidably arranged on the slide rail of the upper bracket. A nut block is arranged on the cone spring fixing plate. A motor and a pressure sensor are installed on the upper bracket. The screw rod driven by the motor is threadedly connected to the nut block. The upper and lower brackets are supported by a magnetorheological damper. The ECU controller receives the pressure signal transmitted by the pressure sensor to control the actions of the motor and the magnetorheological damper. The motor uses a small torque motor. The small torque motor drives the nut block to move, thereby controlling the front and rear movement adjustment of the cone spring. It has a high degree of automation and electrification. Controlled by the ECU controller, intelligent adjustment can be achieved. Through the rotation of the screw rod driven by the motor and the movement of the nut block and the cone spring, this shock absorption mechanism utilizes the lever principle, changes the fulcrum of the lever (the position of the cone spring) to change the lifting force of shock absorption, can improve the conversion rate of the spring, and improves the traditional mode of low conversion rate of lifting force of shock absorption by changing the length of the tension spring. The cone spring is installed inside the inner link, making the use of the shock absorption space to the extreme, reducing the shock absorption height, especially applicable to the field of seat shock absorbers with high stroke and low SIP point.
[0006] As a further optimization of the above technical solution, a slider is arranged on the cone spring fixing plate, and a needle roller bearing is arranged between the slider and the slide rail. The use of the needle roller bearing can reduce the mutual friction force, adjustment force of sliding and reduce abnormal noise.
[0007] As a further optimization of the above technical solution, an inductive displacement sensor is embedded inside the slider to accurately detect the position of the spring movement. The ECU controller receives the displacement signal transmitted by the inductive displacement sensor and the pressure signal transmitted by the pressure sensor to control the actions of the motor and the magnetorheological damper.
[0008] As a further optimization of the above technical solution, one end of the magnetorheological damper is installed at the hinge point of the cross link, and the other end is installed on the connecting shaft of the inner links of the cross links on the front side of both sides. By controlling the magnitude of the damping force of the magnetorheological damper by the ECU controller, that is, the speed of movement and expansion and contraction under different impact forces, the lifting and lowering of the upper bracket and the magnitude of the elastic damping can be realized, and the comfort of the occupant can be adjusted.
[0009] As a further optimization of the above technical solution, each cross link on each side includes an inner link and an outer link, and the support plate is arranged on the two inner links above the hinge shaft.
[0010] As a further optimization of the above technical solution, one end of the tower spring fixing plate is hinged to one end of the pointer link, a pointer is hinged on the lower bracket, one end of the pointer extends into the indicating box, and the other end is hinged to the other end of the pointer link. A pointer observation hole and a weight indication scale for the seat occupant are provided on the indicating box. By observing the position of the pointer movement and the weight indication scale through the observation hole, the weight index of the seat occupant can be seen.
[0011] As a further optimization of the above technical solution, the nut block is a POM plastic nut block.
[0012] As a further optimization of the above technical solution, the lead screw and the nut block adopt a Tr10X2 trapezoidal thread drive. The clearance is eliminated by controlling the thread precision. The POM material has self-lubrication, reducing the frictional resistance, and at the same time the rotation angle is also accurate.
[0013] As a further optimization of the above technical solution, an angle sensor is provided between the upper and lower brackets to accurately detect the angle of the magnetorheological damper, so as to realize the precise control of the damping force of the magnetorheological damper. The ECU controller receives the angle signal transmitted by the angle sensor and the pressure signal transmitted by the pressure sensor to control the actions of the motor and the magnetorheological damper. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the connection relationship between the cross link, the upper and lower brackets and the tower spring of the present invention.
[0015] Figure 2 It is a three-dimensional schematic diagram of the structure of the exposed pressure sensor lamp of the present invention.
[0016] Figure 3 It is a three-dimensional schematic diagram of the structure of the exposed magnetorheological damper, lead screw and other structures of the present invention.
[0017] Figure 4 It is a three-dimensional schematic diagram of the structure of the exposed tower spring, steel ball, lead screw and other structures of the present invention. <able>
[0018] Figure 5 It is a curve diagram of the relationship between the damping angle and the damping vertical force of the shock absorption device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following further describes the present invention with specific embodiments in conjunction with the drawings. See Figures 1 - 5 :
[0020] A seat shock absorber device adaptable to human body weight, comprising an upper bracket 2 and a lower bracket 4 of a seat sitting part. The upper and lower brackets 2 and 4 are supported by cross links 3 arranged on both sides. The middle parts of the cross links 3 on each side are hinged and connected through a hinge shaft. The end parts of the cross links 3 on one side are respectively hinged and connected to the upper and lower brackets 4, and the end parts of the cross links 3 on the other side are respectively slidably connected to the upper and lower brackets 4. A support plate is arranged on the cross link 3 above the hinge shaft. The small end of the cone spring 1 is slidably supported on the support plate through a steel ball 8. The large end of the cone spring 1 is fixed to a cone spring fixing plate 9 which is slidably arranged on the slide rail of the upper bracket 2. A nut block 11 is arranged on the cone spring fixing plate 9. A motor 5 and a pressure sensor 12 are installed on the upper bracket 2. The lead screw 6 driven by the motor 5 is in threaded connection with the nut block 11. The upper and lower brackets 4 are supported by a magnetorheological damper 10. The ECU controller 9 receives the pressure signal transmitted by the pressure sensor 12 to control the actions of the motor 5 and the magnetorheological damper 10.
[0021] As a further optimization of the above technical solution, a slider 14 is arranged on the cone spring fixing plate 9, and a needle roller bearing is arranged between the slider 14 and the slide rail.
[0022] As a further optimization of the above technical solution, an inductive displacement sensor 13 is embedded inside the slider 14. The ECU controller 9 receives the displacement signal transmitted by the inductive displacement sensor 13 and the pressure signal transmitted by the pressure sensor 12 to control the actions of the motor 5 and the magnetorheological damper 10.
[0023] As a further optimization of the above technical solution, one end of the magnetorheological damper 10 is installed at the hinge point of the cross link 3, and the other end is installed on the connecting shaft of the inner links of the cross links 3 on the front side of both sides.
[0024] As a further optimization of the above technical solution, each cross link 3 on each side includes an inner link and an outer link, and the support plate is arranged on the two inner links above the hinge shaft.
[0025] As a further optimization of the above technical solution, the cone spring fixing plate 9 is hinged at one end of a pointer link, a pointer 15 is hinged on the lower bracket 4, one end of the pointer 15 extends into an indicating box 16, and the other end is hinged to the other end of the pointer link. A pointer observation hole and a weight indication scale for the seat occupant are arranged on the indicating box 16.
[0026] As a further optimization of the above technical solution, the nut block 11 is a POM plastic nut block 11.
[0027] As a further optimization of the above technical solution, the lead screw 6 and the nut block 11 adopt a Tr10X2 trapezoidal thread transmission.
[0028] As a further optimization of the above technical solution, an angle sensor 7 is provided between the upper and lower brackets 4, and the ECU controller 9 receives the angle signal transmitted by the angle sensor 7 and the pressure signal transmitted by the pressure sensor 12 to control the operations of the motor 5 and the magnetorheological damper 10.
[0029] After the driver or passenger (load) sits on the seat cushion of the seat, the pressure sensor 12 senses the body weight. At this time, the pressure sensor 12 transmits the detected pressure signal to the ECU controller 9; upon receiving the signal transmitted by the pressure sensor, the ECU controller 9 outputs an electric current to the magnetorheological damper 10. The magnetorheological damper 10 is filled with a special electromagnetic fluid. Under the action of a magnetic field, the magnetic particles in the electromagnetic fluid will quickly align in a certain direction, hindering the flow of the oil in the piston channel. By changing the magnitude and direction of the electric current, the intensity and direction of the magnetic field can be adjusted, thereby changing the arrangement of the magnetic particles and the degree of obstruction to the oil flow, achieving precise control of the damping force of the magnetorheological damper 10. The ECU controller 9 will also control the motor 5 to drive the lead screw 6 to adjust the position of the tower spring 1. The tower spring 1 moves between A and B in Figure 1 When the tower spring 1 moves from point A to point B, the fulcrum of the lever changes, and the stiffness of the shock absorber becomes softer. For example, when the body weight is 75 KG, the pressure sensor 12 will obtain a corresponding equal pressure value, and the ECU controller 9 outputs a corresponding current to the motor 5 according to the magnitude of the pressure value. The motor 5 drives the lead screw 15, and the lead screw 15 drives the tower spring fixing plate 9. The tower spring fixing plate 9 and the tower spring 1 move from A to B. At this time, the slider 14 is internally embedded with an inductive displacement sensor 13, which also constantly records the position of the tower spring 1. When the ECU controller 9 detects that the inductive displacement sensor 13 is consistent. The motor 5 stops rotating. At the same time, the ECU controller 9 will also give a current corresponding to the pressure value of the pressure sensor 12 to the magnetorheological damper 10 to generate a fixed damping value. In this way, the ECU controller automatically adjusts a matching value with appropriate various parameters according to the body weight of the person. Realize automatic parameter adjustment for people with different weights and completely abandon manual adjustment. At this time, the pointer is hinged on the lower bracket and rotates in cooperation with the pointer. The upper surface of the indicator box 16 is provided with an observation hole for observing the movement position of the pointer and a body weight indication scale. According to theoretical calculations, the relationship diagram between the damping angle and the damping vertical force of the shock absorption device. The angle sensor 7 detects the change of the magnetorheological damper 10. When the angle between the axis of the magnetorheological damper 10 and the horizontal plane becomes smaller, the ECU controller 9 will increase the current to increase the damping force of the magnetorheological damper 10 to ensure the comfort of shock absorption. Similarly, when the angle between the axis of the magnetorheological damper 10 and the horizontal plane becomes larger, the current is reduced to lower the damping force to ensure the comfort of shock absorption. Always keep the magnitude of the damping force in the vertical direction consistent and will not affect the change of the damping force magnitude in the vertical direction due to the deformation of the magnetorheological damping angle.
[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still make simple substitutions or modifications of similar technologies to the technical solutions or technical features recorded in the foregoing embodiments, and these simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and essence of the technical solutions of the embodiments of the present invention, and are still within the protection scope of the present invention.
Claims
1. A seat shock absorption device adaptable to human body weight, comprising an upper bracket and a lower bracket of a seat sitting part, wherein the upper and lower brackets are supported by cross links arranged on both sides, the middle parts of the cross links on each side are hinged and connected through a hinge shaft, the end parts of the cross links on one side are respectively hinged and connected with the upper and lower brackets, and the end parts of the cross links on the other side are respectively slidably connected with the upper and lower brackets, and it is characterized in that: A support plate is provided on the cross link above the hinge shaft. The small end of the conical spring is slidably supported on the support plate by a steel ball. The large end of the conical spring is fixed to a conical spring fixing plate that slides on the slide rail of the upper bracket. A nut block is provided on the conical spring fixing plate. A motor and a pressure sensor are installed on the upper bracket. The lead screw driven by the motor is in threaded connection with the nut block. The upper and lower brackets are supported by a magnetorheological damper. The ECU controller receives the pressure signal transmitted by the pressure sensor to control the actions of the motor and the magnetorheological damper.
2. The seat shock absorption device adaptable to the human body weight according to claim 1, wherein: A slider is provided on the conical spring fixing plate. A needle roller bearing is provided between the slider and the slide rail.
3. The seat shock absorber device adapted to the human body weight according to claim 2, characterized in that: An inductive displacement sensor is embedded inside the slider. The ECU controller receives the displacement signal transmitted by the inductive displacement sensor and the pressure signal transmitted by the pressure sensor to control the actions of the motor and the magnetorheological damper.
4. An adaptive human weight seat shock absorption device according to claim 1, characterized in that: One end of the magnetorheological damper is installed at the hinge point of the cross link, and the other end is installed on the connecting shaft of the inner links of the cross links on both sides of the front side.
5. The seat shock absorption device adaptable to human body weight according to claim 1, characterized in that: Each cross link on each side includes an inner link and an outer link. The support plate is provided on the two inner links above the hinge shaft.
6. The seat shock absorption device adapted to the human body weight according to claim 1, wherein: One end of the pointer link is hinged to the conical spring fixing plate. A pointer is hinged to the lower bracket. One end of the pointer extends into the indicating box, and the other end is hinged to the other end of the pointer link. A pointer observation hole and a weight indication scale for the seat occupant are provided on the indicating box.
7. An adaptive human weight seat shock absorption device according to claim 1, characterized in that: The nut block is a POM plastic nut block.
8. The seat shock absorption device adaptable to human body weight according to claim 1, characterized in that: The lead screw and the nut block adopt a Tr10X2 trapezoidal thread transmission.
9. An adaptive human weight seat shock absorber device according to any one of claims 1-8, characterized in that: An angle sensor is provided between the upper and lower brackets. The ECU controller receives the angle signal transmitted by the angle sensor and the pressure signal transmitted by the pressure sensor to control the actions of the motor and the magnetorheological damper.