Drive-by-wire accelerator of tractor

Abstract

The utility model provides a drive-by-wire accelerator of a tractor, which adopts an angle sensor to measure the opening degree of the accelerator, adopts a motor to control an accelerator pedal, realizes the drive-by-wire control of the accelerator, and solves the problems caused when the tractor uses a mechanical accelerator. An accelerator upper pedal is rotationally installed in the base through a shaft pin, the outer side of the shaft pin is sleeved with a large torsion spring, the two ends of the large torsion spring are connected with the base and the accelerator upper pedal respectively, the large torsion spring provides torsion for the base and the accelerator upper pedal, and a certain included angle is formed between the base and the accelerator upper pedal. A coupling is arranged on the accelerator upper pedal, a servo motor is arranged on the coupling, an angle sensor is arranged on the accelerator upper pedal, the servo motor and the angle sensor are connected with an electronic control unit (ECU) through wires, anti-skidding grains are arranged on the top of the accelerator upper pedal, friction force is improved, and the accelerator upper pedal is made of engineering plastics.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor throttles, in particular to a wire-controlled throttle for a tractor. Background Art

[0002] The throttle-by-wire system, commonly known as the "electronic throttle," is also known as the "accelerator pedal." When driving a motor vehicle, encountering an uphill slope or needing to accelerate, you press the accelerator pedal deeply to increase engine power and torque, commonly known as "fueling." Literally, the "throttle" controls the amount of fuel entering the vehicle.

[0003] Long ago, the accelerator pedal was mechanically connected to the engine, and at that time, the accelerator directly controlled the fuel flow. This traditional throttle control method is simple and crude. When the mechanical parameters (i.e., the lever ratio) are set, the throttle valve opens the same amount as the accelerator is depressed, and the response speed is very fast. However, in daily driving, some novice or unskilled drivers may suddenly press the accelerator pedal to the bottom due to improper operation, or some overly aggressive drivers may suddenly press the accelerator pedal to the bottom. At this time, the throttle valve suddenly opens, and the engine enters the maximum load state. Full load will cause incomplete engine combustion, and the injector will increase fuel injection, resulting in fuel waste. At the same time, the engine load increases, shortening the engine life.

[0004] Existing tractors still use mechanical throttles, which have poor performance and easily cause fuel waste. At the same time, the load on the engine increases, shortening the service life of the engine. Therefore, a tractor wire-controlled throttle is proposed. Utility Model Content

[0005] In view of the defects in the prior art, the present invention solves the following technical problems: existing tractors still use mechanical throttles, which have poor performance and easily cause fuel waste; at the same time, the load on the engine increases, shortening the service life of the engine, and provides a tractor wire-controlled throttle.

[0006] In order to achieve the above objectives, the present invention provides:

[0007] A wire-controlled throttle for a tractor comprises a base, a grounding base being welded to the bottom edge of the base, an upper throttle pedal being rotatably mounted on the base via an axle pin, a large torsion spring being sleeved on the outer side of the axle pin, the two ends of the large torsion spring being respectively connected to the base and the upper throttle pedal, the large torsion spring providing torque to the base and the upper throttle pedal so that they form a certain angle, a coupling being connected to the left end of the axle pin, a servo motor being mounted on the coupling, an angle sensor being mounted on the upper throttle pedal, and an ECU electronic control unit being connected to the servo motor and the angle sensor via wires.

[0008] Preferably, the top of the accelerator upper pedal is provided with anti-skid grooves to improve friction, and the accelerator upper pedal is made of engineering plastic.

[0009] Preferably, the right end of the axle pin is provided with a thread, and a nut is connected to the outside of the thread. The axle pin is fixed by the nut, and the throttle pedal is connected to the base. After removing the nut, the throttle pedal, base and large torsion spring can be removed.

[0010] Preferably, two ear plates are symmetrically installed at the bottom of the accelerator pedal, a first bolt shaft is installed in the two ear plates, two connecting pieces are rotatably installed on the first bolt shaft, a first rolling body is sleeved on the first bolt shaft between the two connecting pieces, a second bolt shaft is installed between the two connecting pieces, a second rolling body is sleeved on the second bolt shaft, the second rolling body is in contact with the grounded base, nuts are installed on the first bolt shaft and the second bolt shaft, and the first bolt shaft and the second bolt shaft are fixed by the nuts to fix the two connecting pieces.

[0011] Preferably, a support shaft is fixedly installed between the two connecting pieces, and a small torsion spring is sleeved on the outer side of the support shaft.

[0012] Preferably, the large torsion spring and the small torsion spring are made of carbon spring steel.

[0013] Preferably, the first rolling body and the second rolling body are both made of plastic.

[0014] Preferably, the connecting piece and the grounding base are both made of aluminum alloy.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The utility model is provided with an angle sensor and a servo motor on the accelerator upper pedal. The rotation of the servo motor drives the pedal to realize throttle control. The angle sensor continuously monitors the position height of the pedal and converts the height into the throttle opening and transmits it to the electronic control unit ECU. After receiving the signal, the ECU adjusts the throttle opening in real time and adjusts the engine speed to realize tractor throttle control. The large torsion spring provides reset torque for the accelerator upper pedal. The first rolling body and the second rolling body play a supporting role between the accelerator upper pedal and the ground base.

[0017] The utility model adopts an angle sensor to measure the throttle opening, adopts a motor to control the throttle pedal, realizes the wire control of the throttle, and solves the problems that occur when a tractor uses a mechanical throttle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a side structural diagram of the design;

[0019] Figure 2This is a schematic diagram of the cross-sectional structure of this design;

[0020] Figure 3 This is a top view structural diagram of this design;

[0021] Figure 4 This is a schematic diagram of the physical structure of the product in this design.

[0022] In the figure: 1. Accelerator pedal; 2. Base; 3. Servo motor; 4. Coupling; 5. Large torsion spring; 6. First rolling element; 7. Nut; 8. Small torsion spring; 9. Connecting piece; 10. Second rolling element; 11. Ground base; 12. Angle sensor; 13. Ear plate. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0024] See also Figure 1-4 As shown, a tractor wire-controlled throttle includes a base 2, a grounding base 11 is welded to the bottom edge of the base 2, an accelerator pedal 1 is rotatably installed on the base 2 through an axle pin, a large torsion spring 5 is sleeved on the outer side of the axle pin, and the two ends of the large torsion spring 5 are respectively connected to the base 2 and the accelerator pedal 1, and the large torsion spring 5 provides torque to the base 2 and the accelerator pedal 1 so that they form a certain angle, the left end of the axle pin is connected to a coupling 4, a servo motor 3 is installed on the coupling 4, an angle sensor 12 is installed on the accelerator pedal 1, and the servo motor 3 and the angle sensor 12 are connected to the ECU electronic control unit through wires.

[0025] In this embodiment, the top of the accelerator upper pedal 1 is provided with anti-skid grooves to improve friction. The accelerator upper pedal 1 is made of engineering plastic.

[0026] In this embodiment, a thread is provided at the right end of the axle pin, and a nut 7 is connected to the outside of the thread. The axle pin is fixed by the nut 7, and the throttle pedal 1 is connected to the base 2. After removing the nut 7, the throttle pedal 1, the base 2, and the large torsion spring 5 can be removed.

[0027] In this embodiment, two ear plates 13 are symmetrically installed at the bottom of the accelerator pedal 1, and a first bolt shaft is installed in the two ear plates 13. Two connecting pieces 9 are rotatably installed on the first bolt shaft. A first rolling body 6 is sleeved on the first bolt shaft between the two connecting pieces 9, and a second bolt shaft is installed between the two connecting pieces 9. A second rolling body 10 is sleeved on the second bolt shaft. The second rolling body 10 is in contact with the grounded base 11. Nuts are installed on the first bolt shaft and the second bolt shaft, and the first bolt shaft and the second bolt shaft are fixed by the nuts, thereby fixing the two connecting pieces 9.

[0028] In this embodiment, a support shaft is fixedly installed between the two connecting pieces 9, and a small torsion spring 8 is sleeved on the outer side of the support shaft.

[0029] In this embodiment, the large torsion spring 5 and the small torsion spring 8 are made of carbon spring steel.

[0030] In this embodiment, the first rolling element 6 and the second rolling element 10 are both made of plastic.

[0031] In this embodiment, the connecting piece 9 and the grounding base 11 are both made of aluminum alloy.

[0032] Working method: An angle sensor 12 and a servo motor 3 are installed on the accelerator pedal 1. The rotation of the servo motor 3 drives the pedal to control the throttle. The angle sensor 12 continuously monitors the position height of the pedal and converts this height into a throttle opening and transmits it to the electronic control unit ECU. After receiving the signal, the ECU adjusts the throttle opening in real time and adjusts the engine speed to realize the tractor's throttle control. The large torsion spring 5 provides a reset torque for the accelerator pedal 1. The first rolling body 6 and the second rolling body 10 play a supporting role between the accelerator pedal 1 and the ground base 11. The angle sensor is used to measure the throttle opening, and the motor is used to control the throttle pedal to realize the wire control of the throttle.

[0033] In this embodiment, the angle sensor is a device that detects and quantifies the rotation angle or tilt angle of an object. It can convert mechanical motion into electrical signals. Angle sensors are mainly divided into two categories: contact and non-contact, each with different working principles and application scenarios. The throttle-by-wire uses a non-contact angle sensor. The angle sensor is made of hard aluminum alloy and its working principle is to convert the angle into an electrical signal through the principle of electromagnetic induction. The parameters of the angle sensor are shown in the table:

[0034] Angle sensor parameters

[0035]

[0036] In this embodiment, the selection of the servo motor

[0037] Since the working load of the servo motor is the torque of the torsion spring, the servo motor can control the accelerator pedal to achieve the desired effect only when the output torque provided by the servo motor is greater than the torque when the torsion spring returns to its initial position.

[0038] The torque of the servo motor needs to be calculated:

[0039]

[0040] Where: T—Torque (N·m); P—Power (W); n—Motor speed (r / min). The servo motor is selected based on its torque. When the accelerator pedal is depressed, the torque generated when the torsion spring returns to its initial position is approximately 2N·m. Therefore, a servo motor with a rated torque greater than 2N·m should be selected. Therefore, a motor with a rated torque of 3.18N·m and a rated power of 1000W is selected. The servo motor parameters are shown in the table:

[0041] Servo motor parameters

[0042]

[0043] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any product with the same or similar technical solutions as the present invention is within the scope of protection.

Claims

1. A tractor wire-controlled throttle, comprising a base (2), a grounding base (11) welded to the bottom edge of the base (2), an accelerator upper pedal (1) rotatably mounted on the base (2) via an axle pin, and characterized in that: A large torsion spring (5) is sleeved on the outer side of the shaft pin, and the two ends of the large torsion spring (5) are respectively connected to the base (2) and the accelerator upper pedal (1). The large torsion spring (5) provides torque to the base (2) and the accelerator upper pedal (1), so that they form a certain angle. The left end of the shaft pin is connected to a coupling (4), and a servo motor (3) is installed on the coupling (4). An angle sensor (12) is installed on the accelerator upper pedal (1), and the servo motor (3) and the angle sensor (12) are connected to an ECU electronic control unit through wires.

2. The tractor throttle-by-wire according to claim 1, characterized in that: The top of the accelerator upper pedal (1) is provided with anti-skid grooves.

3. The tractor throttle-by-wire according to claim 1, characterized in that: The right end of the shaft pin is provided with a thread, and the outer side of the thread is connected to a nut (7). The shaft pin is fixed by the nut (7), and the accelerator upper pedal (1) is connected to the base (2).

4. The tractor throttle-by-wire according to claim 1, characterized in that: Two ear plates (13) are symmetrically mounted on the bottom of the accelerator upper pedal (1), a first bolt shaft is mounted in the two ear plates (13), two connecting pieces (9) are rotatably mounted on the first bolt shaft, a first rolling body (6) is sleeved on the first bolt shaft between the two connecting pieces (9), a second bolt shaft is mounted between the two connecting pieces (9), a second rolling body (10) is sleeved on the second bolt shaft, the second rolling body (10) is in contact with a ground base (11), and nuts are mounted on both the first bolt shaft and the second bolt shaft.

5. The tractor throttle-by-wire according to claim 4, characterized in that: A support shaft is fixedly installed between the two connecting pieces (9), and a small torsion spring (8) is sleeved on the outer side of the support shaft.

6. The tractor throttle-by-wire according to claim 1, characterized in that: The large torsion spring (5) and the small torsion spring (8) are made of carbon spring steel.

7. The tractor throttle-by-wire according to claim 4, characterized in that: The first rolling body (6) and the second rolling body (10) are both made of plastic.

8. The tractor throttle-by-wire according to claim 4, characterized in that: The connecting piece (9) and the grounding base (11) are both made of aluminum alloy.

9. The tractor throttle-by-wire according to claim 1, characterized in that: The accelerator upper pedal (1) is made of engineering plastic.

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