Torsion measuring device for steering wheel

Abstract

The utility model relates to the technical field of steering wheel torsion measurement, and particularly discloses a steering wheel torsion measuring device which comprises a flat plate, the lower end of the flat plate is fixedly connected with two end plates which are distributed left and right, and the opposite sides of the two end plates are respectively and rotatably connected with a first screw rod and a second screw rod. The outer wall of the first lead screw and the outer wall of the second lead screw are in threaded connection with moving blocks correspondingly, vertical rods are fixedly connected to the lower ends of the two moving blocks correspondingly, and U-shaped rods are fixed to the lower ends of the two vertical rods correspondingly. The V-shaped structures of the V-shaped clamping plates are matched with the section diameters of different steering wheels, the distance between the two clamping plates on the same side is adjusted to be compatible with the overall diameter of the steering wheel, and rapid fixing of multiple vehicle types such as cars and trucks is achieved. By integrating the operation, the installation process is simplified, and the measurement efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steering wheel torque measurement technology, and specifically discloses a steering wheel torque measuring device. Background Technology

[0002] As the core human-machine interface of the vehicle's steering system, the steering wheel's input torque directly reflects the real-time coupling state between the driver's operating intentions and the steering load. Accurate measurement of steering wheel torque is not only crucial for the dynamic response accuracy of the electric power steering (EPS) system, but also a key input parameter for human-machine co-driving control, driver behavior modeling, and steering mechanism health monitoring in intelligent driving systems.

[0003] Among existing torque measurement technologies, the strain gauge method is widely used due to its mature principle. However, this method requires meticulous grinding of the steering shaft surface, strain gauge positioning, bonding, and curing, along with a complex bridge calibration process, making the operation time-consuming and labor-intensive. Furthermore, traditional strain gauge solutions have significant limitations in adaptability to steering shaft structures: on the one hand, the bonding position must strictly match the steering shaft diameter, leading to customized designs for different vehicle models (such as cars and trucks); on the other hand, if the steering shaft has irregular structures such as splines or flanges, additional adjustments to the strain gauge layout and bonding process are required, further reducing the versatility and engineering efficiency of the solution. Therefore, a steering wheel torque measurement device is needed to solve this problem. Utility Model Content

[0004] This invention proposes a steering wheel torque measuring device that is compatible with steering wheel diameters of different specifications, enabling rapid adaptation to various vehicle models such as cars and trucks; at the same time, it simplifies the installation process and improves measurement efficiency.

[0005] This utility model is implemented as follows: a steering wheel torque measuring device includes a flat plate. The lower end of the flat plate is fixedly connected to two left and right distributed end plates. The opposite sides of the two end plates are respectively rotatably connected to a first lead screw and a second lead screw. The outer walls of the first lead screw and the second lead screw are respectively threaded with moving blocks. The lower ends of the two moving blocks are fixedly connected to vertical rods. The lower ends of the two vertical rods are fixedly connected to U-shaped rods. The opposite sides of the two U-shaped rods are fixedly connected to two front and rear distributed clamping seats. V-shaped clamping plates are embedded and installed on one side of the outer wall of the four clamping seats.

[0006] A drive mechanism is provided on the right side of the second lead screw;

[0007] A disc is positioned above the flat plate, and a static torque sensor is positioned between the disc and the flat plate. A handle is positioned at the upper end of the disc, and a display screen and a microcontroller are respectively mounted on the upper end of the disc, located to the right of the handle.

[0008] As a preferred embodiment of the steering wheel torque measuring device of this utility model, the driving mechanism includes a driving box fixedly connected to the right end of the right side end plate, a worm gear rotatably connected inside the driving box, a worm wheel meshing with the outer wall of the worm gear, a transmission shaft fixedly connected between the worm wheel and the second lead screw, and a handwheel extending to the outside of the driving box fixedly connected to the upper end of the worm gear.

[0009] As a preferred embodiment of the steering wheel torque measuring device of this utility model, a connecting shaft is fixedly connected between the first lead screw and the second lead screw.

[0010] As a preferred embodiment of the steering wheel torque measuring device of this utility model, a slide rail is installed at the lower end of the plate, and the two moving blocks are slidably connected to the lower end of the plate through the slide rail.

[0011] In a preferred embodiment of the steering wheel torque measuring device of this utility model, the threads of the first lead screw and the second lead screw are opposite in direction.

[0012] As a preferred embodiment of the steering wheel torque measuring device of this utility model, the upper end of the disc is provided with an annular groove, and an annular slider that is fixedly connected to the handle is slidably connected inside the annular groove.

[0013] In a preferred embodiment of the steering wheel torque measuring device of this utility model, the static torque sensor is fixedly connected to the disc and the plate respectively by multiple bolts.

[0014] The beneficial effects of this utility model are:

[0015] The drive mechanism drives the second lead screw and the first lead screw to rotate synchronously, causing the two moving blocks to slide horizontally relative to each other. This, in turn, causes the linkage vertical rod, U-shaped rod, and clamping seat on the same side to move symmetrically, ensuring that the inner walls of the four V-shaped clamping plates are tightly abutted against the outer wall of the steering wheel, forming a four-point positioning clamping. The V-shaped structure of the V-shaped clamping plates adapts to different steering wheel cross-sectional diameters, and the spacing between the two clamping plates on the same side is adjustable to accommodate the overall diameter of the steering wheel, enabling rapid fixing of various vehicle models, including cars and trucks.

[0016] When the handle is rotated, the steering wheel drives the disc and plate to rotate. The static torque sensor detects the torque and outputs an electrical signal, which is processed by the microcontroller and displayed on the screen in real time. By combining the above operations, the installation process is simplified and the measurement efficiency is improved. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a front sectional view of the steering wheel torque measuring device of this utility model;

[0019] Figure 2 This is a partial structural diagram of the present invention;

[0020] Figure 3 This is a partial structural diagram of the present invention;

[0021] Figure 4 This is a partial left-side view of the structure of this utility model.

[0022] The markings in the diagram are: 1. Flat plate; 2. End plate; 3. Second lead screw; 4. First lead screw; 5. Connecting shaft; 6. Moving block; 7. Vertical rod; 8. U-shaped rod; 9. Clamping seat; 10. Drive box; 11. Worm gear; 12. Worm wheel; 13. Slide rail; 14. Static torque sensor; 15. Disc; 16. Handle; 17. Display screen; 18. Microcontroller; 19. V-shaped clamp. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0024] Please see Figure 1-4 A steering wheel torque measuring device includes a flat plate 1. Two left-right distributed end plates 2 are fixedly connected to the lower end of the flat plate 1. A first lead screw 4 and a second lead screw 3 are rotatably connected to the opposite side of the two end plates 2. Moving blocks 6 are threadedly connected to the outer walls of the first lead screw 4 and the second lead screw 3. Vertical rods 7 are fixedly connected to the lower ends of the two moving blocks 6. U-shaped rods 8 are fixedly connected to the lower ends of the two vertical rods 7. Two front-back distributed clamping seats 9 are fixedly connected to the opposite side of the two U-shaped rods 8. V-shaped clamping plates 19 are embedded and installed on one side of the outer wall of the four clamping seats 9.

[0025] A drive mechanism is provided on the right side of the second lead screw 3;

[0026] A disc 15 is positioned above the flat plate 1. A static torque sensor 14 is positioned between the disc 15 and the flat plate 1. A handle 16 is positioned at the top of the disc 15. A display screen 17 and a microcontroller 18 are respectively mounted on the top of the disc 15 to the right of the handle 16.

[0027] In this embodiment: during use, the drive mechanism drives the second lead screw 3 and the first lead screw 4 to rotate, thereby causing the two moving blocks 6 to slide horizontally relative to each other. At the same time, it drives the two vertical rods 7, the two U-shaped rods 8 and the two clamping seats 9 located on the same side to move relative to each other, forming a symmetrical clamping action until the inner walls of the four V-shaped clamping plates 19 are tightly abutted against the outer wall of the steering wheel, forming a four-point positioning clamping, thus completing the fixation of the device to the steering wheel. Since the V-shaped clamping plates 19 have a V-shaped structure, they can adapt to different steering wheel ring cross-sectional circle diameters. Furthermore, due to the relative movement of the two V-shaped clamping plates 19 on the same side, they can adapt to different steering wheel ring overall large circle diameters, achieving compatibility with different steering wheel diameters and realizing the purpose of rapid adaptation for multiple vehicle models such as cars and trucks.

[0028] When a rotational force is applied to the handle 16, it causes the disc 15, the plate 1, and the steering wheel to rotate around the steering axis. Since the disc 15 and the plate 1 are rigidly connected by a static torque sensor 14, the torque of the steering wheel is detected by the static torque sensor 14 and converted into an electrical signal. The microcontroller 18 receives the electrical signal output by the static torque sensor 14, and after analog-to-digital conversion and algorithm processing, displays the torque value on the display screen 17 in real time, which is convenient for the measurement personnel to observe. By combining the above operations, the installation process is further simplified and the measurement efficiency is improved.

[0029] It should be noted that the static torque sensor 14 is the HBM T40F series dual flange torque sensor 14; the microcontroller 18 is STMicroelectronics STM32F407VGT6, and the recommended model of the display (17) is Newhaven Display NHD-4.3-480272EF-ATXI#T.

[0030] As a technical optimization of this utility model, the drive mechanism includes a drive box 10 fixedly connected to the right end of the right end plate 2. A worm 11 is rotatably connected inside the drive box 10. A worm wheel 12 is meshed with the outer wall of the worm 11. A transmission shaft is fixedly connected between the worm wheel 12 and the second lead screw 3. A handwheel extending to the outside of the drive box 10 is fixedly connected to the upper end of the worm 11.

[0031] In this embodiment: when the rotational force is input through the handwheel, the worm 11 drives the worm wheel 12 and the transmission shaft to rotate, thereby driving the second lead screw 3. The drive mechanism adopts the meshing transmission of the worm 11 and the worm wheel 12, which has a one-way self-locking characteristic to prevent the second lead screw 3 and the first lead screw 4 from accidentally retracting due to external vibration or torque reaction force during the clamping process, and to ensure the long-term maintenance of the clamping force.

[0032] As a technical optimization of this utility model, a connecting shaft 5 is fixedly connected between the first lead screw 4 and the second lead screw 3.

[0033] In this embodiment: by setting a connecting shaft 5, the first lead screw 4 and the second lead screw 3 are connected and fixed, so that the first lead screw 4 and the second lead screw 3 rotate synchronously.

[0034] As a technical optimization of this utility model, a slide rail 13 is installed at the lower end of the plate 1, and two moving blocks 6 are slidably connected to the lower end of the plate 1 through the slide rail 13.

[0035] In this embodiment: by setting the slide rail 13, the two moving blocks 6 can only move horizontally.

[0036] As a technical optimization of this utility model, the thread directions of the first lead screw 4 and the second lead screw 3 are opposite.

[0037] In this embodiment: Since the threads of the first lead screw 4 and the second lead screw 3 are opposite, it is convenient to drive the two moving blocks 6 to move relative to each other or move away from each other at the same time.

[0038] As a technical optimization of this utility model, an annular groove is provided at the upper end of the disc 15, and an annular slider that is fixedly connected to the handle 16 is slidably connected inside the annular groove.

[0039] In this embodiment: Since the handle 16 is rotatably connected to the upper end of the disk 15 through the annular slide groove, the hand does not need to leave the handle 16 during the measurement process, thus achieving the effect of continuous measurement.

[0040] As a technical optimization of this utility model, the static torque sensor 14 is fixedly connected to the disc 15 and the plate 1 by multiple bolts.

[0041] In this embodiment, the static torque sensor 14 is installed between the disk 15 and the plate 1 by setting multiple bolts.

[0042] The working principle and usage process of this utility model are as follows: When the rotational force is input through the handwheel, the worm 11 drives the worm wheel 12 and the transmission shaft to rotate, which in turn drives the second lead screw 3 to rotate, and drives the first lead screw 4 to rotate through the connecting shaft 5. Since the thread direction of the second lead screw 3 and the first lead screw 4 are opposite, the two moving blocks 6 are driven to slide horizontally relative to each other by the slide rail 13. At the same time, the two vertical rods 7, the two U-shaped rods 8 and the two clamping seats 9 located on the same side move relative to each other, forming a symmetrical clamping action until the inner wall of the four V-shaped clamping plates 19 is tightly abutted against the outer wall of the steering wheel, forming a four-point positioning clamping, and completing the fixation of the device to the steering wheel. Since the V-shaped clamping plate 19 has a V-shaped structure, it can adapt to the cross-sectional circle diameter of different steering wheel rings. Moreover, due to the relative movement of the two V-shaped clamping plates 19 on the same side, it can adapt to the overall large circle diameter of different steering wheel rings, achieving compatibility with different specifications of steering wheel diameters and realizing the purpose of rapid adaptation to multiple models such as cars and trucks.

[0043] When a rotational force is applied to the handle 16, the handle 16 slides in the annular groove of the disc 15 via the annular slider, causing the disc 15, the plate 1, and the steering wheel to rotate around the steering axis. Since the disc 15 and the plate 1 are rigidly connected by the static torque sensor 14, the torque of the steering wheel is detected by the static torque sensor 14 and converted into an electrical signal. The microcontroller 18 receives the electrical signal output by the static torque sensor 14, and after analog-to-digital conversion and algorithm processing, displays the torque value on the display screen 17 in real time, which is convenient for the measurement personnel to observe. By combining the above operations, the installation process is further simplified and the measurement efficiency is improved.

[0044] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A steering wheel torsion measuring device comprising a flat plate (1), characterized in that: The lower end of the flat plate (1) is fixedly connected with two left and right distributed end plates (2), the opposite sides of the two end plates (2) are rotatably connected with a first lead screw (4) and a second lead screw (3) respectively, the outer walls of the first lead screw (4) and the second lead screw (3) are threadedly connected with moving blocks (6) respectively, the lower ends of the two moving blocks (6) are fixedly connected with vertical rods (7), the lower ends of the two vertical rods (7) are fixedly connected with U-shaped rods (8), the opposite sides of the two U-shaped rods (8) are fixedly connected with two front and rear distributed clamping seats (9), the outer walls of the four clamping seats (9) are embeddedly installed with V-shaped clamping plates (19) on one side. The right side of the second lead screw (3) is provided with a driving mechanism; The upper side of the flat plate (1) is provided with a disc (15), a static torque sensor (14) is arranged between the disc (15) and the flat plate (1), the upper end of the disc (15) is provided with a handle (16), and the upper end of the disc (15) is respectively installed with a display screen (17) and a microcontroller (18) located to the right of the handle (16).

2. A steering wheel torque measurement device according to claim 1, characterised in that: The driving mechanism comprises a driving box (10) fixedly connected to the right end of the right end plate (2), a worm (11) rotatably connected in the driving box (10), a worm wheel (12) meshingly connected to the outer wall of the worm (11), a transmission shaft fixedly connected between the worm wheel (12) and the second lead screw (3), and a hand wheel fixedly connected to the upper end of the worm (11) and extending to the outside of the driving box (10).

3. A steering wheel torque measurement device according to claim 1, wherein: The first lead screw (4) and the second lead screw (3) are fixedly connected with a connecting shaft (5).

4. A steering wheel torque measurement device according to claim 1, wherein: The lower end of the flat plate (1) is provided with a sliding rail (13), and the two moving blocks (6) are slidably connected to the lower end of the flat plate (1) through the sliding rail (13).

5. The steering wheel torque measurement device of claim 1, wherein: The screw directions of the first lead screw (4) and the second lead screw (3) are opposite.

6. A steering wheel torque measurement device according to claim 1, wherein: The upper end of the disc (15) is provided with an annular sliding groove, and an annular sliding block fixedly connected with the handle (16) is slidably connected in the annular sliding groove.

7. The steering wheel torsion measurement device of claim 1, wherein: The static torque sensor (14) is fixedly connected with the disc (15) and the flat plate (1) through a plurality of bolts respectively.

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