Accelerator control system of road roller

Abstract

The utility model discloses a road roller accelerator control system which comprises a mode change-over switch, the mode change-over switch is a two-way switch, one way of the mode change-over switch is connected with a controller, the other way of the mode change-over switch is connected with an accelerator electromagnetic valve, the controller is connected with a potential knob and an adjusting element, the adjusting element is connected with an accelerator rocker arm, and the accelerator rocker arm is connected with the mode change-over switch. Wherein the adjusting element is used for pushing a mechanical accelerator on an engine to rotate clockwise or anticlockwise through the accelerator rocker arm after the controller receives a control signal of the potential knob, and the accelerator electromagnetic valve is connected with the accelerator rocker arm through an executing element. According to the accelerator control system of the road roller, a traditional mechanical accelerator is improved into the electronic accelerator, rapid switching between the rated rotating speed mode and the stepless speed regulation mode can be achieved through the mode switching switch, then the working intensity of a driver can be reduced, and the equipment arrangement space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery throttle control, in particular to a road roller throttle control system. Background Art

[0002] At present, the main models of the national II emission road rollers are single-drum road rollers and tire road rollers, both of which mainly use mechanical throttles. The mechanical throttle adjusts the throttle through an axle cable, thereby realizing the change of the engine speed. The driver adjusts the throttle by operating a circular handle directly connected to the axle.

[0003] The usage conditions of different models at the construction site are different. For example, in the vibration compaction operation, the single-drum road roller mainly operates at the rated speed to ensure the vibration frequency and excitation force to meet the construction requirements. When it is statically pressed, there is no need for vibration and the load is small. Therefore, it may need to operate at a low speed during static pressing; when the tire road roller is used in slope or initial water stable pressing construction, the load is large and it needs to operate at the engine rated speed. However, in some light load conditions such as water stable recompression and asphalt, it does not need to operate at the rated speed and may only need to operate at a low speed to meet the requirements.

[0004] Therefore, in the prior art, there is a situation of frequent operation of the handle, which increases the working intensity of the driver. In addition, the space for arranging the handle needs to be considered additionally. Summary of the Utility Model

[0005] An embodiment of the present application provides a road roller throttle control system, which improves the traditional mechanical throttle to an electronic throttle. Through a mode switching switch, it can quickly switch between the rated speed and stepless speed regulation modes, thereby reducing the working intensity of the driver and saving the equipment layout space.

[0006] An embodiment of the present application provides a road roller throttle control system, including a mode switching switch. The mode switching switch is a double-way switch, one way of which is connected to a controller, and the other way is connected to a throttle solenoid valve. The controller is respectively connected to a potentiometer knob and an adjusting element. The adjusting element is connected to a throttle rocker arm. The adjusting element is used to push the mechanical throttle on the engine to rotate clockwise or counterclockwise through the throttle rocker arm after the controller receives the control signal of the potentiometer knob. The throttle solenoid valve is connected to the throttle rocker arm through an actuating element.

[0007] In a possible implementation manner, the mode switching switch is a rocker switch, a knob or a button.

[0008] In a possible implementation, the adjusting element includes a servo motor and an electric cylinder. The servo motor is electrically connected to the controller, and the servo motor is connected to the electric cylinder through a ball screw pair. The electric cylinder is connected to the throttle rocker arm through a flexible shaft.

[0009] In a possible implementation, the road roller throttle control system further includes a wheel speed sensor. The wheel speed sensor is installed on the engine to sense the engine speed, and the wheel speed sensor is electrically connected to the controller to feedback the wheel speed signal to the controller.

[0010] In a possible implementation, the electric cylinder is a low-pressure electric cylinder.

[0011] In a possible implementation, the actuating element is a flexible shaft.

[0012] Beneficial effects: Compared with the prior art, the road roller throttle control system provided by this application improves the traditional mechanical throttle to an electronic throttle, which can quickly switch between stepless speed regulation and rated speed through a mode switch, can meet the vehicle's operation under different working conditions, reduce the operator's work intensity, and at the same time save the layout space of the traditional handle.

[0013] These and other objects, features and advantages of the present utility model are fully embodied through the following detailed description. Description of the Drawings

[0014] Figure 1 Shows a schematic diagram of the principle of the road roller throttle control system of this application.

[0015] Figure 2 Shows a schematic diagram of the structure of the electric cylinder driving the throttle rocker arm in this application. Detailed Embodiments

[0016] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present utility model.

[0017] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0018] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0019] Reference Figure 1 and Figure 2 Referring to

[0020] and

[0021] the embodiment of the present application provides a throttle control system for a road roller, including a mode switch 10. The mode switch 10 is a dual - way switch, one way of which is connected to a controller 20, and the other way is connected to a throttle solenoid valve 30.

[0022] The controller 20 is respectively connected to a potentiometer knob 40 and an adjusting element 60. The adjusting element 60 is connected to a throttle rocker arm 50. The adjusting element 60 is used to push the mechanical throttle on the engine to rotate clockwise or counterclockwise through the throttle rocker arm 50 after the controller 20 receives the control signal from the potentiometer knob 40.

[0023] When the vehicle operates in the rated speed mode, the controller 20 is not activated, and the potentiometer knob 40 has no effect, that is, the stepless speed control circuit is open. The control signal of the mode switch 10 is directly output to the throttle solenoid valve 30, and then drives the throttle rocker arm 50 through the actuator 31, so as to push the mechanical throttle of the engine to the rated stroke position, so that the engine always operates at the rated speed.

[0024] In one embodiment, the mode switch 10 is a rocker switch, a knob or a button.

[0025] In one embodiment, the adjusting element 60 includes a servo motor 61 and an electric cylinder 62. The servo motor 61 is electrically connected to the controller 20 so as to be controlled to rotate forward and backward. The servo motor 61 is connected to the electric cylinder 62 through a ball screw pair, and then converts the forward and backward rotational motion into the linear reciprocating motion of the electric cylinder 62. In addition, the electric cylinder 62 is connected to the throttle rocker arm 50 through a flexible shaft 63, and then pushes the mechanical throttle of the engine through the throttle rocker arm 50 to form a clockwise or counterclockwise rotational motion, realizing the adjustment of the engine speed with high adjustment accuracy.

[0026] The ball screw pair, also known as the ball screw pair or the ball screw nut pair, is composed of a screw and a nut. It is a transmission device with relatively high precision and the most commonly used in transmission machinery. It can convert rotational motion into linear motion, or convert linear motion into rotational motion.

[0027] Further preferably, the road roller throttle control system further includes a wheel speed sensor 70. The wheel speed sensor 70 is installed on the engine to sense the speed of the engine. At the same time, the wheel speed sensor 70 is electrically connected to the controller 20 to feedback the wheel speed signal to the controller 20. In this way, the wheel speed sensor 70 can monitor the speed of the engine controlled by the throttle rocker arm 50 in real time, horizontally compare this speed with the potential ratio output by the potentiometer knob 40, and after being judged by the controller 20, feedback to the servo motor, which can drive the electric cylinder 62 to further adjust the throttle rocker arm 50, and then can realize the closed-loop feedback of the engine speed, further improve the control accuracy of the engine speed, and stabilize the speed output of the engine, improving the construction quality.

[0028] In one embodiment, the electric cylinder 62 is a low-voltage electric cylinder, which can still work effectively in a low-temperature environment and has strong adaptability.

[0029] In one embodiment, the actuator 31 is a flexible shaft, which has small rigidity and elasticity. As a non-linear transmission or a transmission component between non-coplanar planes, it can simplify the transmission machinery and has high transmission accuracy at the same time.

[0030] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention can have any deformation or modification without departing from the said principles.

Claims

1. Road roller throttle control system, characterized in that, It includes a mode switching switch, and the mode switching switch is a two-way switch. One path is connected to a controller, and the other path is connected to a throttle solenoid valve. The controller is respectively connected to a potentiometer knob and an adjusting element, and the adjusting element is connected to a throttle rocker arm. The adjusting element is used to push the mechanical throttle on the engine to rotate clockwise or counterclockwise through the throttle rocker arm after the controller receives the control signal from the potentiometer knob. The throttle solenoid valve is connected to the throttle rocker arm through an actuator.

2. The road roller throttle control system according to claim 1, characterized in that, The mode switching switch is a toggle switch, a knob or a button.

3. The road roller throttle control system according to claim 1, characterized in that, The adjusting element includes a servo motor and an electric cylinder. The servo motor is electrically connected to the controller. The servo motor is connected to the electric cylinder through a ball screw pair, and the electric cylinder is connected to the throttle rocker arm through a flexible shaft.

4. The road roller throttle control system according to claim 3, characterized in that, It also includes a wheel speed sensor. The wheel speed sensor is installed on the engine and is used to sense the rotational speed of the engine. The wheel speed sensor is electrically connected to the controller to feedback a wheel speed signal to the controller.

5. The road roller throttle control system according to claim 3, wherein, The electric cylinder is a low-pressure electric cylinder.

6. The road roller throttle control system according to claim 1, characterized in that, The actuator is a flexible shaft.

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