A mechanical accelerator pedal that converts pedal signals into electrical signals.

Abstract

This utility model discloses a mechanical accelerator pedal that converts pedal signals into electrical signals, relating to the field of pedal technology. It includes a suspended pedal mechanism, a signal conversion module, and a linkage mechanism. The pedal mechanism comprises a pedal seat, an accelerator pedal, and a pull rod. The accelerator pedal is rotatably mounted on the pedal seat, with a foot pedal mounted at its rear end. A torsion spring is provided between the accelerator pedal and the pedal seat. The pull rod is fixed to the front end of the accelerator pedal and extends away from the accelerator pedal. The signal conversion module includes a sensor bracket and an angle detection unit. The linkage mechanism includes a first link and a second link. The first link is fixedly connected to the measuring shaft of the angle detection unit. One end of the second link is hinged to the first link, and the other end is hinged to the pull rod. This improvement is based on the existing suspended accelerator pedal of a National III emission standard commercial vehicle, converting the mechanical motion signal of the accelerator pedal into an electrical signal to meet the reference signal requirements of electrically driven trailers.

Description

Technical Field

[0001] This utility model relates to the field of pedal technology, and in particular to a mechanical accelerator pedal that can convert pedal signals into electrical signals. Background Technology

[0002] China III emission standard commercial vehicles have demonstrated strong market competitiveness in regions such as Africa due to their price advantage, good adaptability, and extensive service network. However, with the gradual increase in the export sales of electric trailers, China III commercial vehicles face new challenges when working in conjunction with electric trailers. Because the accelerator pedal of China III commercial vehicles is a mechanical structure, it lacks an electrical signal, failing to provide the necessary reference signal to the electric trailer and thus preventing normal operation.

[0003] In existing technology, Chinese patent CN 105818683 B discloses a horizontal accelerator pedal mechanical structure that can convert mechanical signals into electrical signals. However, China III commercial vehicles generally use a suspended accelerator pedal structure. The structure of the horizontal accelerator pedal differs significantly from that of the suspended accelerator pedal, and they are incompatible in terms of installation method and motion transmission mechanism, so it cannot be directly applied to China III commercial vehicles. Utility Model Content

[0004] The purpose of this invention is to provide a mechanical accelerator pedal that can convert pedal signals into electrical signals. It is an improvement on the existing suspended accelerator pedal of China III commercial vehicles, which converts the mechanical motion signal of the accelerator pedal into an electrical signal to meet the reference signal requirements of electric drive trailers.

[0005] To achieve the above objectives, this utility model provides a mechanical accelerator pedal that can convert pedal signals into electrical signals, including a suspended pedal mechanism, a signal conversion module, and a linkage mechanism. 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 limited and 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. The other end of the pull rod is hinged to a pull wire ring, 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 an angle detection unit mounted on the sensor bracket. The linkage mechanism transmits the rotational motion of the pedal mechanism to the angle detection unit. It includes a first link and a second link. The first link is fixedly connected to the measuring shaft of the angle detection unit. One end of the second link is hinged to the first link, and the other end is hinged to the pull rod.

[0006] With the above structure, the device adopts a combination design of a suspended pedal mechanism, a signal conversion module, and a linkage mechanism. The structure is reasonable and can realize the basic operation function of the accelerator pedal. At the same time, the linkage mechanism transmits the rotational motion of the pedal mechanism to the angle detection unit. The connection between the first link and the second link ensures the accuracy of motion transmission. It can convert the pedal signal into an electrical signal, which meets the reference signal acquisition needs when the National III commercial vehicle and the electric drive trailer work together, and solves the problem that the electric drive trailer cannot operate normally due to insufficient electrical signal of the National III commercial vehicle itself.

[0007] Preferably, the sensor bracket is mounted above the pull rod. This design facilitates the rational layout of the components, making the overall structure more compact, and also benefits the signal conversion module's detection of pedal movement.

[0008] Preferably, the mounting bracket has a vertically arranged oblong hole, and the sensor bracket is installed in the oblong hole in an adjustable position. This structure facilitates adjustment of the positional relationship between the angle detection unit and the pull rod to adapt to different installation and usage requirements, thereby improving the versatility and flexibility of the device.

[0009] Preferably, the angle detection unit is any one of a resistive, Hall effect, or inductive angle sensor. This provides a variety of options, allowing for flexible selection of the appropriate angle sensor based on actual application scenarios, cost, accuracy requirements, and other factors.

[0010] Preferably, a pivot is installed at the end of the pull rod, and the pull ring is hinged to the second connecting rod on the same pivot. This structural design simplifies the connection between components, improves coordination of movement, reduces interference during movement, and enhances the reliability and stability of the device.

[0011] Preferably, the foot pedal is mounted on the accelerator pedal with an adjustable position. This design allows different drivers to adjust the pedal position according to their own habits, improving driving comfort and ease of operation.

[0012] Preferably, a positioning post is provided on the fixed frame at a position diagonally below the angle detection unit, and a tension spring is provided between the positioning post and the linkage mechanism. With this structure, when the torsion spring force weakens, the tension spring can assist the accelerator pedal in maintaining the maximum lifting height, reducing detection errors and improving the detection accuracy and stability of the device.

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

[0014] This invention solves the technical problem that the existing suspended accelerator pedal cannot convert mechanical signals into electrical signals. Based on the existing suspended accelerator pedal of the National III commercial vehicle, this invention improves upon it by converting the mechanical motion signal of the accelerator pedal into an electrical signal to meet the reference signal requirements of the electric drive trailer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a mechanical accelerator pedal (in the unpressed state) that can convert pedal signals into electrical signals according to this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a mechanical accelerator pedal (in the depressed state) that can convert pedal signals into electrical signals according to this utility model;

[0017] Figure 3 This is a top view of a mechanical accelerator pedal that can convert pedal signals into electrical signals, according to this utility model.

[0018] In the diagram, 1. Pedal mechanism, 11. Pedal seat, 110. Mounting plate, 12. Accelerator pedal, 120. Rotating shaft, 121. Foot pedal, 13. Pull rod, 130. Rotating shaft, 131. Cable pull ring, 14. Torsion spring, 15. Accelerator cable, 2. Signal conversion module, 21. Sensor bracket, 22. Angle detection unit, 3. Linkage mechanism, 31. First link, 32. Second link, 4. Fixing bracket, 41. Waist-shaped hole, 42. Positioning post, 5. Tension spring. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] The orientations mentioned in this specification refer to the orientation of the mechanical accelerator pedal of this utility model when it is working normally, which can convert pedal signals into electrical signals. It does not limit the orientation during storage and transportation, but only represents the relative positional relationship, not the absolute positional relationship.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a mechanical accelerator pedal that can convert pedal signals into electrical signals is mounted on a fixed frame 4, including a suspended pedal mechanism 1, a signal conversion module 2, and a linkage mechanism 3.

[0022] The pedal mechanism 1 includes a pedal seat 11, an accelerator pedal 12, and a lever 13. The pedal seat 11 is mounted on the fixed frame 4; the front end of the accelerator pedal 12 is rotatably mounted on the pedal seat 11, meaning the accelerator pedal 12 can rotate between its maximum lifting height and its minimum lowering height. The rotation is limited by: limiting bosses on the inner sides of the mounting plates on both sides of the pedal seat 11, and an arc-shaped stop at the corresponding position on the front end of the accelerator pedal 12. When the accelerator pedal 12 rotates upward to its maximum lifting angle, the arc-shaped stop abuts against the limiting bosses; when it rotates downward to its maximum depressing angle, the bottom of the accelerator pedal contacts the buffer pad of the pedal seat, achieving bidirectional mechanical limiting. The rear end of the accelerator pedal 12 extends rearward as a cantilever and is fitted with a foot pedal 121 for the driver to operate. The foot pedal 121 is mounted on the accelerator pedal 12 in an adjustable position. Multiple mounting holes are provided on the accelerator pedal 12 along its extension direction. By adjusting the foot pedal 121 to fit into different mounting holes, its position can be adjusted, allowing different drivers to find a suitable pedal position. A torsion spring 14 is provided between the accelerator pedal 12 and the pedal seat 11. Under the action of the torsion spring 14, the accelerator pedal 12 is in a raised position, ensuring that it returns to its initial position when no external force is applied.

[0023] The throttle pedal 12 is rotated and installed in the following way:

[0024] The pedal seat 11 has two mounting plates 110 extending towards the accelerator pedal 12, with through holes facing each other on the two mounting plates 110. The front end of the accelerator pedal 12 is inserted between the two mounting plates 110. Rotating shafts 120 protruding to both sides of its front end are fixed, and the rotating shafts 120 are inserted into the through holes of the corresponding mounting plates 110 and rotatably installed within the through holes. A torsion spring 14 is sleeved on the rotating shaft 120, with one end inserted into the pedal seat 11 and the other end inserted into the accelerator pedal 12.

[0025] The lever 13 is fixed to the front end of the accelerator pedal 12. In this embodiment, it is fixed to the rotating shaft 120 and extends away from the accelerator pedal 12. The lever 13 and the accelerator pedal 12 form a "seesaw" structure. The other end of the lever 13 is hinged to a cable ring 131, and an accelerator cable 15 is fixed on the cable ring 131.

[0026] 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 pedal rotation angle and the throttle cable displacement are approximately linear. This is because of the circular arc characteristic of the motion trajectory. The lever 13 moves in an arc around the rotation axis at the front end of the throttle pedal 12, with a rotation angle θ. 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 represent the approximation. Theoretically, when θ≤30°, sinθ≈θ (in radians, error ≤5%), thus it can be simplified to L≈R·θ. However, strictly speaking, the two are sinusoidal rather than absolutely linear; therefore, "approximately equal to" is used to represent this approximation. Actual deviation: As θ increases (e.g., approaching 30°), the deviation between sinθ and θ will increase slightly. The total error range mentioned above can be controlled within 5%. A deviation within 5% fully meets the accuracy requirements of the reference signal for electric drive trailers (typically, the allowable error is ≤5%). Within the commonly used angle range of the accelerator pedal in commercial vehicles, this deviation is negligible and does not affect the actual control accuracy. Therefore, the rotation angle of the accelerator pedal 12 is used for the conversion of the electrical signal.

[0027] The signal conversion module 2 includes a sensor bracket 21 fixed to the mounting frame 4 and an angle detection unit 22 mounted on the sensor bracket 21. In this embodiment, the sensor bracket 21 is mounted above the pull rod 13. To facilitate adjustment of the positional relationship between the angle detection unit 22 and the pull rod 13, a slotted hole 41 is vertically provided on the mounting frame 4, and the sensor bracket 21 is installed in the slotted hole 41 in an adjustable position using mounting bolts. The angle detection unit 22 is any one of a resistive, Hall effect, or inductive angle sensor.

[0028] The linkage mechanism 3 transmits the rotational motion of the pedal mechanism 1 to the angle detection unit 22. It includes a first link 31 and a second link 32. The first link 31 is fixedly connected to the measuring shaft of the angle detection unit 22; either a keyed connection or an interference fit can be used, as long as synchronous rotation between the two is ensured. This embodiment does not impose any restrictions on this. One end of the second link 32 is hinged to the first link 31, and the other end is hinged to the pull rod 13. In this embodiment, a rotating shaft 130 is installed at the end of the pull rod 13, and the pull ring 131 and the second link 32 are hinged to the same rotating shaft 130, making the movement between the components more coordinated.

[0029] When the driver presses pedal 121, accelerator pedal 12 rotates downwards, while lever 13 rotates upwards, causing accelerator cable 15 to move upwards, thus increasing the throttle. Simultaneously, the second linkage 32 pulls the first linkage 31 to rotate, which in turn rotates the measuring axis of angle detection unit 22. Angle detection unit 22 converts the angle into electrical parameters, such as resistance, voltage, and frequency. After processing by the conditioning circuit, these electrical parameters output a standard electrical signal (such as 0-5V voltage or PWM signal) to the electric drive control system. The conditioning circuit is a circuit integrated inside the angle detection unit or closely related to it. It amplifies, filters, and linearizes the electrical signal output by the angle detection unit to meet the input requirements of the subsequent electric drive control system. Most commercially available angle sensors (especially digital output types) 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.

[0030] Furthermore, if the spring force of torsion spring 14 weakens, its ability to provide recovery decreases. After the driver releases the foot pedal, the accelerator pedal 12 may not fully return to the raised position, remaining in a position closer to the depressed position than the normal raised position. This results in the angle detected by the angle detection unit being larger than at normal idle speed. To reduce this detection error, a positioning post 42 is provided on the mounting bracket 4 at a position diagonally below the angle detection unit 22. A tension spring 5 is provided between the positioning post 42 and the linkage mechanism 3. In this embodiment, one end of the tension spring 5 is fixed to the positioning post 42, and the other end is hooked onto the rotating shaft 130. In practical applications, it can also be adjusted to other positions on the linkage mechanism 3 as needed, such as on the first connecting rod 31 or other parts. Under the action of the tension spring 5, the accelerator pedal 12 can maintain its maximum raised height. This device is regularly inspected and tested, and the torsion spring 14 and tension spring 5 are replaced to prevent long-term failure.

[0031] 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 that can convert pedal signals into electrical signals, characterized in that: Includes a suspended pedal mechanism, a signal conversion module, and a linkage mechanism; 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 on the mounting frame and an angle detection unit mounted on the sensor bracket; The linkage mechanism transmits the rotational motion of the pedal mechanism to the angle detection unit; it includes a first link and a second link, the first link being fixedly connected to the measuring shaft of the angle detection unit; one end of the second link is hinged to the first link, and the other end is hinged to the pull rod.

2. A mechanical accelerator pedal that can convert pedal signals into electrical signals according to claim 1, characterized in that: The sensor bracket is mounted above the pull rod.

3. A mechanical accelerator pedal that can convert pedal signals into electrical signals according to claim 2, characterized in that: The mounting bracket has a vertically arranged waist-shaped hole, and the sensor bracket is installed in the waist-shaped hole in an adjustable position.

4. A mechanical accelerator pedal that can convert pedal signals into electrical signals according to claim 1, characterized in that: The angle detection unit is any one of a resistive, Hall effect, or inductive angle sensor.

5. A mechanical accelerator pedal that can convert pedal signals into electrical signals according to claim 1, characterized in that: The end of the pull rod is equipped with a pivot, and the pull wire ring is hinged to the second connecting rod on the same pivot.

6. A mechanical accelerator pedal that can convert pedal signals into electrical signals according to claim 2, characterized in that: The foot pedal, which can be adjusted forward and backward, is mounted on the accelerator pedal.

7. A mechanical accelerator pedal that can convert pedal signals into electrical signals according to claim 1, characterized in that: A positioning post is provided on the fixed frame at a position diagonally below the angle detection unit, and a tension spring is provided between the positioning post and the linkage mechanism.

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