Mechanical accelerator pedal signal acquisition device

Abstract

The utility model discloses a kind of mechanical throttle pedal signal acquisition devices, it is related to the technical field of pedal, including suspension type pedal mechanism, signal conversion module;Pedal mechanism includes pedal seat, throttle pedal and pull rod;Pedal seat is installed on fixed frame;The front end of throttle pedal is rotationally installed on pedal seat, its rear end extends rearward and is installed with foot pedal in cantilevered mode;Throttle pedal is provided with torsion spring between pedal seat;Pull rod is fixed at the front end of throttle pedal, and extend in the direction away from throttle pedal;The other end of pull rod is hinged with pull line ring, and pull line ring is fixed with throttle pull line;Signal conversion module includes sensor support and linear displacement sensor;Linear displacement sensor includes detection body and telescopic rod;Telescopic rod is always abutted on pull rod. Through the cooperation of suspension type pedal mechanism and signal conversion module, the accurate detection to throttle pedal position change is realized.

Description

Technical Field

[0001] This utility model relates to the field of pedal technology, and in particular to a mechanical accelerator pedal signal acquisition device. Background Technology

[0002] In the automotive field, accurate acquisition of accelerator pedal signals is crucial for precise engine control. Traditional mechanical accelerator pedal signal acquisition methods have many problems. For example, some solutions that rely on rotation angle detection are based on a chain of "pedal rotation angle → linkage mechanism transmission → angle sensor detection," as disclosed in Chinese patent CN 105818683 B, which describes a horizontal accelerator pedal mechanical structure. This multi-link hinge gap generates cumulative errors, and the elastic deformation of the linkage also causes lag during rapid pedaling. Furthermore, the angle sensor itself has linear errors, resulting in a relatively large overall error. Utility Model Content

[0003] The purpose of this invention is to provide a mechanical accelerator pedal signal acquisition device that can accurately acquire accelerator pedal signals, reduce signal acquisition errors, and has the advantages of simple structure and convenient installation and maintenance.

[0004] To achieve the above objectives, this utility model provides a mechanical accelerator pedal signal acquisition device, including a suspended pedal mechanism and a signal conversion module. The pedal mechanism includes a pedal seat, an accelerator pedal, and a pull rod. The pedal seat is mounted on a fixed frame. The front end of the accelerator pedal is rotatably mounted on the pedal seat, and its rear end extends rearward as a cantilever and is fitted with a foot pedal. A torsion spring is provided between the accelerator pedal and the pedal seat, and under the action of the torsion spring, the accelerator pedal is in a raised state. The pull rod is fixed to the front end of the accelerator pedal and extends away from the accelerator pedal. A pull wire ring is hinged to the other end of the pull rod, and an accelerator pull wire is fixed on the pull wire ring. The signal conversion module includes a sensor bracket fixed on the fixed frame and a linear displacement sensor mounted on the sensor bracket. The linear displacement sensor includes a detection body fixed on the sensor bracket and a telescopic rod that slides up and down on the detection body. The detection body is used to detect the extension distance of the telescopic rod. The telescopic rod always rests against the pull rod.

[0005] By adopting the above structure, the suspension pedal mechanism, in conjunction with the signal conversion module, enables precise detection of changes in the accelerator pedal position. The signal conversion module converts the pedal position change into an electrical signal, providing the vehicle control system with accurate accelerator pedal status information. This helps the vehicle precisely control the engine throttle opening, improving driving performance and safety.

[0006] Preferably, the telescopic rod always rests against the top of the pull rod. This arrangement allows the telescopic rod to better follow the extension and retraction of the pull rod, reducing detection errors caused by improper installation, improving the accuracy of signal acquisition, and ensuring that the linear displacement sensor can more accurately detect changes in the pull rod's displacement.

[0007] Preferably, the telescopic rod of the linear displacement sensor is fixed with a roller assembly. The roller assembly includes a roller frame fixed to the telescopic rod and a rotating wheel rotatably mounted on the roller frame. The rotating wheel rolls along the top of the rod. This structural design transforms the original sliding friction into rolling friction, greatly reducing frictional resistance, decreasing wear, and extending the service life of the components. Simultaneously, it improves the sensor's response speed and detection accuracy to the rod's movement, making signal acquisition more timely and accurate.

[0008] Preferably, the roller frame has upwardly extending guide posts on both sides of the telescopic rod, which are slidably mounted on the sensor bracket. A compression spring is fitted onto the guide post, clamping it between the roller frame and the sensor bracket. This structural design provides precise guidance for the vertical movement of the roller assembly, ensuring that the rotating wheel always rolls along the correct trajectory at the top of the rod, avoiding deviation and further improving the stability and accuracy of the detection. The return spring fitted onto the guide post, clamped between the roller frame and the sensor bracket, helps the roller assembly quickly return to its original position after movement, ensuring it is always in the appropriate working position and maintaining the stability of signal acquisition.

[0009] Preferably, the top of the pull rod is provided with an upwardly protruding limiting rail; the surface of the rotating wheel is provided with a limiting groove for the limiting rail to engage. This structural design further restricts the movement trajectory of the rotating wheel, preventing it from detaching from the pull rod during rolling, making the rolling of the rotating wheel on the pull rod smoother, effectively improving the reliability of signal acquisition, and reducing signal anomalies caused by the rotating wheel derailing.

[0010] Preferably, the mounting bracket has a vertically arranged oblong hole, and the sensor bracket is installed in the oblong hole with adjustable vertical position. The position of the sensor bracket can be flexibly adjusted according to actual installation requirements and vehicle structural characteristics, making the cooperation between the linear displacement sensor and the tie rod more precise, improving the versatility and adaptability of the device, and meeting the needs of different vehicle models and installation scenarios.

[0011] Preferably, the sensor bracket covers the outside of the linear displacement sensor, and its side wall is provided with locking threaded posts for fixing it to the mounting bracket. The mounting bracket is provided with through holes for the locking threaded posts to pass through.

[0012] Preferably, the foot pedal is mounted on the accelerator pedal with an adjustable position.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are:

[0014] This invention, a mechanical accelerator pedal signal acquisition device, solves the technical problem of large errors in existing mechanical accelerator pedal signal acquisition methods. Through the cooperation of a suspended pedal mechanism and a signal conversion module, this invention achieves accurate detection of accelerator pedal position changes. The signal conversion module converts the pedal position changes into electrical signals, providing accurate accelerator pedal status information to the vehicle control system. This helps the vehicle precisely control the engine throttle opening, improving driving performance and safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a mechanical accelerator pedal signal acquisition device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of a mechanical accelerator pedal signal acquisition device (without pedal pressing) according to this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of a mechanical accelerator pedal signal acquisition device (in the pedaling state) according to this utility model;

[0018] Figure 4 This is a top view of a mechanical accelerator pedal signal acquisition device according to this utility model;

[0019] Figure 5 yes Figure 1 A magnified view of part A in the image;

[0020] Figure 6 This is a schematic diagram of the signal conversion module;

[0021] Figure 7 yes Figure 6 A schematic diagram of the internal structure.

[0022] In the diagram, 1 is the mounting bracket, 11 is the waist-shaped hole, 2 is the pedal mechanism, 21 is the pedal seat, 210 is the mounting plate, 22 is the accelerator pedal, 220 is the rotating shaft, 221 is the foot pedal, 23 is the pull rod, 231 is the cable ring, 232 is the limit rail, 24 is the torsion spring, 25 is the accelerator cable, 3 is the signal conversion module, 31 is the sensor bracket, 32 is the linear displacement sensor, 321 is the detection body, 322 is the telescopic rod, 323 is the return spring, 324 is the guide post, 33 is the roller assembly, 331 is the roller frame, and 332 is the rotating wheel. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] The orientations mentioned in this specification are based on the orientation of the mechanical accelerator pedal signal acquisition device of this utility model when it is working normally. They do not limit the orientation during storage and transportation, and only represent relative positional relationships, not absolute positional relationships.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a mechanical accelerator pedal 22 signal acquisition device is installed on a fixed frame 1, including a suspended pedal mechanism 2 and a signal conversion module 3.

[0026] The pedal mechanism 2 includes a pedal seat 21, an accelerator pedal 22, and a lever 23. The pedal seat 21 is mounted on the fixed frame 1, providing a supporting foundation for the entire pedal mechanism 2. The front end of the accelerator pedal 22 is rotatably mounted on the pedal seat 21, meaning the accelerator pedal 22 can rotate between its maximum lifting height and its minimum lowering height. Figure 2 The middle position represents the maximum lifting height (without stepping on the pedals). Figure 3 This is the minimum descent height (in the footing position).

[0027] The limiting rotation method is as follows: Limiting bosses are provided on the inner sides of the mounting plates on both sides of the pedal seat 21, and an arc-shaped stop is provided at the corresponding position of the front end of the accelerator pedal 22. When the accelerator pedal 22 rotates upward to its maximum lifting angle, the arc-shaped stop abuts against the limiting bosses; when it rotates downward to its maximum pressing angle, the bottom of the accelerator pedal 22 contacts the buffer pad of the pedal seat 21, achieving bidirectional mechanical limiting. The rear end of the accelerator pedal 22 extends rearward as a cantilever and is equipped with a foot pedal 221 for the driver to operate. The foot pedal 221 is mounted on the accelerator pedal 22 in an adjustable position, meaning that multiple mounting holes are provided on the accelerator pedal 22 along its extension direction. By adjusting the foot pedal 221 to be installed in different mounting holes, the installation position of the foot pedal 221 can be adjusted, allowing different drivers to adjust to a suitable pressing position. A torsion spring 24 is provided between the accelerator pedal 22 and the pedal seat 21. Under the action of the torsion spring 24, the accelerator pedal 22 is in the lifted state, ensuring that the accelerator pedal 22 can return to the initial position when no external force is applied.

[0028] The throttle pedal 22 is rotated and installed in the following way:

[0029] The pedal seat 21 has two mounting plates 210 extending towards the accelerator pedal 22, with through holes facing each other on the two mounting plates 210. The front end of the accelerator pedal 22 is inserted between the two mounting plates 210. Rotating shafts 220 protruding to both sides of its front end are fixed, and the rotating shafts 220 are inserted into the through holes of the corresponding mounting plates 210 and rotatably mounted within the through holes. A torsion spring 24 is sleeved on the rotating shaft 220, with one end inserted into the pedal seat 21 and the other end inserted into the accelerator pedal 22.

[0030] The lever 23 is fixed to the front end of the accelerator pedal 22. In this embodiment, it is fixed to the rotating shaft 220 and extends away from the accelerator pedal 22. The lever 23 and the accelerator pedal 22 form a "seesaw" structure. The other end of the lever 23 is hinged to a cable loop 231, and a throttle cable 25 is fixed on the cable loop 231. The movement of the accelerator pedal 22 is transmitted to the throttle cable through the lever 23, thereby controlling the engine throttle opening.

[0031] Normally, the reference signal required for an electrically driven trailer needs to be directly related to the physical relationship between "pedal opening → throttle cable displacement"; the lifting height H of the lever and the throttle cable displacement L are approximately linearly related. This is because of the circular arc characteristic of the motion trajectory. The lever moves in an arc around the rotation axis at the front end of the throttle pedal 22, with a rotation angle α. The displacement at its end is an arc displacement in three-dimensional space, not simply vertical lifting. The measurement results of this detection device simplify and ignore the curvature effect of the arc motion; therefore, "approximately equal to" is used to indicate the approximation. Furthermore, there is a small gap (typically 0.1-0.3mm) at the hinge point between the lever 23 and the cable ring 231, and the lever 23 undergoes elastic deformation (approximately 0.05-0.1mm) when subjected to force. These factors cause deviations between the actual values ​​and theoretical calculations, making it impossible to completely and accurately describe using geometric formulas. Despite the aforementioned errors, under the common operating conditions of commercial vehicle accelerator pedals (H=0-50mm, α=30°-60°), and with L≈H·cotα, the total error range can be controlled within 2%. A deviation within 2% fully meets the accuracy requirements of electric drive trailers for reference signals (typically, the allowable error is ≤5%).

[0032] The signal conversion module 3 includes a sensor bracket 31 fixed on the mounting frame 1 and a linear displacement sensor 32 mounted on the sensor bracket 31. The linear displacement sensor 32 includes a detection body 321 fixed on the sensor bracket 31 and a telescopic rod 322 slidably mounted on the detection body 321. The detection body 321 is used to detect the telescopic distance of the telescopic rod 322. The telescopic rod 322 always abuts against the pull rod 23. In this embodiment, a return spring 323 is sleeved on the end of the telescopic rod 322 that extends out of the detection body 321. The return spring 323 is clamped between the detection body 321 and the bottom of the telescopic rod 322, thereby keeping the telescopic rod 322 in the extended state, that is, always abutting against the pull rod 23. When the accelerator pedal 22 is pressed, the pull rod 23 moves, causing the telescopic rod 322 to move up and down. The linear displacement sensor 32 detects the change in the telescopic distance of the telescopic rod 322 and converts it into a corresponding electrical signal, thereby achieving accurate detection of the position change of the accelerator pedal 22.

[0033] In this embodiment, the detection body 321 is located above the pull rod 23, and the telescopic rod 322 always rests against the top of the pull rod 23. This arrangement allows the telescopic rod 322 to better follow the extension and retraction of the pull rod 23, reducing detection errors caused by improper installation.

[0034] like Figure 5 , Figure 6 and Figure 7 As shown, a roller assembly 33 is fixed to the end of the telescopic rod 322 of the linear displacement sensor 32. The roller assembly 33 includes a roller frame 331 fixed to the bottom of the telescopic rod 322 and a rotating wheel 332 rotatably mounted on the roller frame 331. The rotating wheel 332 rolls along the top of the pull rod 23, changing the original sliding friction into rolling friction, which greatly reduces frictional resistance, reduces wear, and also improves the sensor's response speed and detection accuracy to the movement of the pull rod 23.

[0035] Guide posts 324 extending upwards are fixed on both sides of the telescopic rod 322 on the roller frame 331. The bottom of the guide posts 324 is fixed to the top of the roller frame 331 by bolts or welding. The guide posts 324 are slidably mounted on the sensor bracket 31, which has guide holes for sliding. The guide posts 324 provide guidance for the up-and-down movement of the roller assembly 33, ensuring that the rotating wheel 332 always rolls along the correct trajectory of the top of the pull rod 23, avoiding deviation and further improving the stability and accuracy of the detection. A compression spring is also fitted on the guide post 324, which is clamped between the roller frame 331 and the sensor bracket 31. The compression spring on the guide post 324 is the main force-applying component, providing continuous pressure to keep the rotating wheel 332 tightly against the pull rod 23; the return spring 323 on the telescopic rod 322 is an auxiliary buffer component, used to absorb the instantaneous impact force of the pull rod 23 movement and control the telescopic rod 322 to extend and retract with the pull rod 23.

[0036] The top of the pull rod 23 is provided with an upwardly protruding limiting rail 232, and the surface of the rotating wheel 332 is provided with a limiting groove for the limiting rail 232 to engage. The cooperation between the limiting rail 232 and the limiting groove not only further restricts the movement trajectory of the rotating wheel 332, preventing it from disengaging from the pull rod 23 during rolling, but also makes the rolling of the rotating wheel 332 on the pull rod 23 more stable, thereby improving the reliability of signal acquisition.

[0037] The mounting bracket 1 has a vertically arranged oblong hole 11, and the sensor bracket 31 is installed in the oblong hole 11 with adjustable position. Through the design of the oblong hole 11, the position of the sensor bracket 31 can be flexibly adjusted according to the actual installation requirements and vehicle structural characteristics, so that the linear displacement sensor 32 and the pull rod 23 can be matched more accurately, thereby improving the versatility and adaptability of the device.

[0038] The sensor bracket 31 covers the outside of the linear displacement sensor 32, and its side wall is provided with locking threaded posts for fixing it to the fixing frame 1. The fixing frame 1 is provided with through holes for the locking threaded posts to pass through. This design can not only protect the linear displacement sensor 32 from external impacts and damage, but also facilitate the installation and fixation between the sensor bracket 31 and the fixing frame 1, ensuring the overall stability of the device.

[0039] During vehicle operation, the driver depresses pedal 221, which causes the accelerator pedal 22 to rotate around pedal seat 21. Accelerator pedal 22, via lever 23, moves the cable ring and accelerator cable. Simultaneously, the movement of lever 23 causes the telescopic rod 322 of linear displacement sensor 32 to move up and down. Linear displacement sensor 32 converts the change in telescopic distance of the rod 322 into an electrical signal output. After processing by the conditioning circuit, the electrical parameters are output as a standard electrical signal to the electric drive control system. The conditioning circuit is a circuit integrated inside or closely related to the linear displacement sensor 32. It amplifies, filters, and linearizes the electrical signal output by the linear displacement sensor 32 to meet the input requirements of the subsequent electric drive control system. Most commercially available linear displacement sensors 32 have built-in conditioning circuits and can be directly connected to the controller; however, basic sensing elements or low-cost models may require external conditioning circuits. When purchasing, it is necessary to confirm based on the application scenario (such as accuracy requirements and environmental interference) and the datasheet to avoid affecting the measurement results due to improper signal processing.

[0040] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A mechanical accelerator pedal signal acquisition device, characterized in that: Includes a suspended pedal mechanism and a signal conversion module; The pedal mechanism includes a pedal seat, an accelerator pedal, and a lever; the pedal seat is mounted on a fixed frame; the front end of the accelerator pedal is rotatably mounted on the pedal seat, and its rear end extends rearward as a cantilever and is fitted with a foot pedal; a torsion spring is provided between the accelerator pedal and the pedal seat, and under the action of the torsion spring, the accelerator pedal is in a raised state; the lever is fixed to the front end of the accelerator pedal and extends away from the accelerator pedal; a pull cable loop is hinged to the other end of the lever, and an accelerator cable is fixed on the pull cable loop; The signal conversion module includes a sensor bracket fixed to the mounting frame and a linear displacement sensor mounted on the sensor bracket; the linear displacement sensor includes a detection body fixed to the sensor bracket and a telescopic rod slidably mounted on the detection body, the detection body being used to detect the telescopic distance of the telescopic rod; The telescopic rod always rests against the pull rod.

2. The mechanical accelerator pedal signal acquisition device according to claim 1, characterized in that: The telescopic rod always rests against the top of the pull rod.

3. The mechanical accelerator pedal signal acquisition device according to claim 2, characterized in that: The telescopic rod of the linear displacement sensor is fixed with a roller assembly, which includes a roller frame fixed to the telescopic rod and a rotating wheel rotatably mounted on the roller frame. The rotating wheel rolls along the top of the rod.

4. The mechanical accelerator pedal signal acquisition device according to claim 3, characterized in that: The roller frame is provided with upwardly extending guide posts on both sides of the telescopic rod, and the guide posts are slidably mounted on the sensor bracket; a compression spring is sleeved on the guide post, and the compression spring is clamped between the roller frame and the sensor bracket.

5. The mechanical accelerator pedal signal acquisition device according to claim 3, characterized in that: The top of the pull rod is provided with an upwardly protruding limiting rail; the surface of the rotating wheel is provided with a limiting groove for the limiting rail to engage.

6. The mechanical accelerator pedal signal acquisition device according to claim 1, characterized in that: The mounting bracket has a vertically arranged waist-shaped hole, and the sensor bracket is installed in the waist-shaped hole with adjustable vertical position.

7. The mechanical accelerator pedal signal acquisition device according to claim 1, characterized in that: The sensor bracket is installed on the outside of the linear displacement sensor, and its side wall is provided with a locking threaded post for fixing it to the fixing frame. The fixing frame is provided with a through hole for the locking threaded post to pass through.

8. The mechanical accelerator pedal signal acquisition device according to claim 1, characterized in that: The foot pedal, which can be adjusted forward and backward, is mounted on the accelerator pedal.

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