Double-pedal control system of electric forklift

Abstract

The utility model belongs to the technical field of forklifts, and particularly discloses a double-pedal control system of an electric forklift, which comprises a vehicle control unit (VCU), a forward pedal and a backward pedal, the forward pedal and the backward pedal are arranged on a pedal mounting frame side by side, and the forward pedal and the backward pedal are connected through an interlocking piece; a front pressure switch and a front Hall potentiometer are mounted at the bottom end of the forward pedal; a rear pressure switch and a rear Hall potentiometer are mounted at the bottom end of the retreating pedal; the front pressure switch, the front Hall type potentiometer, the rear pressure switch and the rear Hall type potentiometer are in signal connection with the vehicle control unit VCU, and the output end of the vehicle control unit VCU is connected with the driving motor. According to the double-pedal control system, the advancing pedal and the retreating pedal control the advancing action or the retreating action of the forklift respectively and control the advancing action or the retreating action independently, and when one pedal breaks down, the other pedal can work normally. And the forward pedal or the backward pedal is in interlocking connection, so that the normal operation of the system is structurally ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electric forklifts, and particularly relates to a dual-pedal control system for an electric forklift. Background Art

[0002] At present, the main operation mode of electric forklifts is to control the movement direction of the vehicle by manually operating the forward and backward switches of the combined switch, that is, the driver uses hands and feet simultaneously. However, in some special working conditions, the way of using hands and feet to operate the forklift is less efficient and not conducive to efficient operation. In response to this situation, there are also those controlled by pedals on the market at present. Its principle is to adopt a single-channel signal input control principle, that is, forward and backward are respectively controlled by one channel of signal. If the dual-pedal structure is damaged or the sensor fails, the whole vehicle will not be able to operate normally, resulting in the inability to drive normally in both the forward and backward directions. Content of the Utility Model

[0003] In view of the above deficiencies of the prior art, the utility model provides a dual-pedal control system for an electric forklift.

[0004] In order to achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] A dual-pedal control system for an electric forklift includes a vehicle controller VCU, a forward pedal and a reverse pedal arranged side by side on a pedal mounting bracket, and the forward pedal and the reverse pedal are connected by an interlock; a front pressure switch and a front Hall potentiometer are installed at the bottom end of the forward pedal; a rear pressure switch and a rear Hall potentiometer are installed at the bottom end of the reverse pedal; the front pressure switch, the front Hall potentiometer, the rear pressure switch and the rear Hall potentiometer are respectively connected to the vehicle controller VCU for signal connection, and the output end of the vehicle controller VCU is connected to a drive motor.

[0006] That is, when the forward pedal is depressed, the front pressure switch and the front Hall potentiometer are turned on and send a forward signal and a current analog signal to the vehicle controller VCU to control the drive motor to work forward. Similarly, when the reverse pedal is depressed, the rear pressure switch and the rear Hall potentiometer are turned on and send a forward signal and a current analog signal to the vehicle controller VCU to control the drive motor to work backward.

[0007] Further, the interlock includes a connecting rod movably installed at the bottom end of the pedal mounting bracket, and the bottom ends of the forward pedal and the reverse pedal are respectively hinged to both ends of the connecting rod through a movable rod; when the forward pedal is depressed, the movable rod drives the connecting rod to move, thus restricting the movement of the reverse pedal; similarly, when the reverse pedal is depressed, the movement of the forward pedal will be restricted.

[0008] In a further solution, a pin shaft is fixedly installed on the bottom end surface of the pedal mounting bracket, and a shaft hole is formed at the center of the connecting rod. The connecting rod is movably sleeved on the pin shaft through the shaft hole.

[0009] In a further solution, a rotating rod is respectively installed at the bottom ends of the forward pedal and the reverse pedal. The bottom end of the rotating rod passes through the pedal mounting bracket and is hinged to the movable rod.

[0010] This application sets up a dual-pedal control to achieve the control input of dual-pedal dual-channel signals. The two channels of signals are independent of each other and respectively control the forward and reverse directions and speeds of the forklift. On the one hand, the logic of manually toggling the combination switch to control the forward or reverse of the forklift is cancelled, releasing the driver's manual control and improving the operating efficiency of the forklift. On the other hand, the two-channel control signals are independent of each other and do not interfere with each other. The damage of one channel of signal will not affect the normal transmission of the other channel of signal. Therefore, this dual-pedal control can take into account the single-pedal control. The damage of one pedal will not affect the normal use of the other pedal, and the normal operation of the electric forklift can be ensured.

[0011] Therefore, the dual-pedal control system of this application improves the operating efficiency of the driver and ensures that the driver operates the steering wheel with one hand and controls the forward and reverse actions of the forklift with both feet respectively.

[0012] In the dual-pedal control system of this application, the forward or reverse pedal respectively controls the forward or reverse action of the forklift and is independently controlled. When one of the pedals fails, the other pedal is not affected and can be used normally. And the forward or reverse pedals are connected by an interlock. That is, when one of the pedals is depressed, the other pedal is locked and cannot be operated. That is, the two pedals cannot be depressed simultaneously, and the structure restricts the simultaneous activation of the two pedal signals to ensure the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The schematic diagram of the specification forming a part of this application is used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0014] Figure 1 is the schematic structural diagram of this application;

[0015] Figure 2 is the control principle block diagram of this application.

[0016] Description of the marks in the figure:

[0017] In the figure: 1 forward pedal, 1-1 front pressure switch, 1-2 front Hall potentiometer, 2 reverse pedal, 2-1 rear pressure switch, 2-2 rear Hall potentiometer, 3 - pedal mounting bracket, 4 - connecting rod, 5 - movable rod, 6 - rotating rod, 7 - pin shaft, 8 - vehicle controller VCU, 9 - drive motor. DETAILED DESCRIPTION

[0018] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0019] like Figure 1 , 2 As shown, an embodiment of the present application provides a dual-pedal control system for an electric forklift, including a vehicle controller VCU8, and a forward pedal 1 and a reverse pedal 2 arranged side by side on a pedal mounting frame 3, wherein the forward pedal 1 and the reverse pedal 2 are connected by an interlocking member; a front pressure switch 1-1 and a front Hall type potentiometer 1-2 are installed at the bottom end of the forward pedal 1; a rear pressure switch 2-1 and a rear Hall type potentiometer 2-2 are installed at the bottom end of the reverse pedal 2; the front pressure switch 1-1, the front Hall type potentiometer 1-2, the rear pressure switch 2-1 and the rear Hall type potentiometer 2-2 are respectively connected to the vehicle controller VCU 8 for signal connection, and the output end of the vehicle controller VCU 8 is connected to the drive motor 9.

[0020] The vehicle controller VCU in this application is a built-in controller on the electric forklift. This application does not improve it, but only electrically connects the signal ends of the front and rear pressure switches and the front and rear Hall potentiometers to the signal ports on the vehicle controller VCU.

[0021] That is, when the forward pedal is pressed, the front pressure switch 1-1 and the front Hall potentiometer 1-2 are connected and send the forward signal and the current analog signal to the vehicle controller VCU 8, controlling the drive motor 9 to work forward. Similarly, when the reverse pedal 2 is pressed, the rear pressure switch 2-1 and the rear Hall potentiometer 2-2 are connected and send the forward signal and the current analog signal to the vehicle controller VCU 8, controlling the drive motor 9 to work backward.

[0022] Among them, the forward pedal controls the movement of the forklift in the forward direction. When the driver steps on the forward pedal, the forward pedal contacts the front pressure switch, causing the front pressure switch to close and triggering a forward gear signal to the VCU controller. When the vehicle controller VCU recognizes the forward signal, it determines that the electric forklift is in the forward state; when the driver continues to deeply step on the forward pedal and the front Hall potentiometer, the front Hall potentiometer will be connected to generate a forward analog signal and transmit it to the vehicle controller VCU. When the vehicle controller VCU detects the change in the analog quantity, it will control the output of alternating current to the drive motor to drive the electric forklift to move forward. Similarly, the reverse pedal 2 controls the movement of the forklift in the reverse direction. When the driver steps on the reverse pedal, the rear pressure switch is closed and the reverse gear signal is sent to the vehicle controller VCU, determining that the electric forklift is in the reverse state; when continuing to deeply step on the reverse pedal, the rear Hall potentiometer circuit is closed to transmit the reverse analog signal to the vehicle controller VCU, controlling the output of alternating current to the drive motor to drive the electric forklift to move backward.

[0023] Since the forward pedal 1 and the reverse pedal 2 are connected by an interlock, the two pedals cannot be stepped on simultaneously. Therefore, the vehicle controller VCU can always recognize only one gear signal (forward or reverse gear signal).

[0024] In this application, the interlock includes a connecting rod 4 movably installed at the bottom end of the pedal mounting bracket 3. The bottom ends of the forward pedal 1 and the reverse pedal 2 are respectively hinged to both ends of the connecting rod 4 through a movable rod 5; when the forward pedal 1 is stepped on, the movable rod 5 drives the connecting rod 4 to move, restricting the movement of the reverse pedal 2; similarly, when the reverse pedal 2 is stepped on, the movement of the forward pedal 1 will be restricted.

[0025] Specifically, a pin shaft 7 is fixedly provided on the bottom end surface of the pedal mounting bracket 3. A shaft hole is provided at the center of the connecting rod 4, and the connecting rod 4 is movably sleeved on the pin shaft 7 through the shaft hole. A rotating rod 6 is respectively installed at the bottom ends of the forward pedal 1 and the reverse pedal 2. The bottom end of the rotating rod 6 passes through the pedal mounting bracket 3 and is hinged to the movable rod 5.

[0026] The specific movement is as Figure 1 shown. Since both the movable rod 5 and the rotating rod 6, and the movable rod 5 and the connecting rod 4 are hinged and can move relative to each other. When the forward pedal 1 is stepped on, the rotating rod 6 moves upward as a whole and drives the movable rod 5 to move horizontally forward; thus driving the end of the connecting rod 4 at the same end to move forward. Since the middle of the connecting rod 4 is movably connected to the pin shaft 7, it rotates on the pin shaft 7, and then the other end of the connecting rod 4 moves in the opposite direction, giving a downward force to the reverse pedal 2 through the movable rod and the rotating rod connected to the reverse pedal. Thus restricting the downward movement of the reverse pedal, that is, restricting its movement. Similarly, when the reverse pedal 2 is stepped on, the movement of the forward pedal 1 will be restricted.

[0027] Thus, an interlock connection between the forward pedal 1 and the reverse pedal 2 is achieved, resulting in the inability to step on the two pedals simultaneously. Therefore, the vehicle control unit (VCU) can always recognize only one gear signal (forward or reverse gear signal).

[0028] Therefore, when the driver steps on the forward pedal and the reverse pedal with both feet respectively, the forward and reverse movements of the forklift can be achieved without manually operating the gear switch to switch the movement direction of the forklift, greatly improving the operating efficiency of the forklift. At the same time, this system controls the forward and reverse processes of the forklift by two separately input pedal signals. The two input signals are independently controlled, which can ensure that if one pedal fails, the other pedal can still be used normally without being affected.

[0029] It can be understood that the above description is only exemplary, and the embodiments of the present application do not limit this.

[0030] The above are only the preferred embodiments of the present application and are not used to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are within the scope of protection of the pending claims of the present application.

Claims

1. A dual-pedal control system for an electric forklift, comprising a vehicle controller VCU (8), and a forward pedal (1) and a reverse pedal (2) arranged side by side on a pedal mounting frame (3), characterized in that: The forward pedal (1) and the reverse pedal (2) are connected via an interlocking member; a front pressure switch (1-1) and a front Hall-type potentiometer (1-2) are installed at the bottom end of the forward pedal (1); a rear pressure switch (2-1) and a rear Hall-type potentiometer (2-2) are installed at the bottom end of the reverse pedal (2); the front pressure switch (1-1), the front Hall-type potentiometer (1-2), the rear pressure switch (2-1) and the rear Hall-type potentiometer (2-2) are respectively connected to a vehicle controller VCU (8) for signal transmission, and an output end of the vehicle controller VCU (8) is connected to a drive motor (9).

2. The dual-pedal control system of an electric forklift according to claim 1, characterized in that: The interlocking member comprises a connecting rod (4) movably mounted on the bottom end of the pedal mounting frame (3), and the bottom ends of the forward pedal (1) and the reverse pedal (2) are respectively hinged to the two ends of the connecting rod (4) through a movable rod (5); when the forward pedal (1) is stepped on, the movable rod (5) drives the connecting rod (4) to move, thereby limiting the movement of the reverse pedal (2); similarly, when the reverse pedal (2) is stepped on, the movement of the forward pedal (1) is limited.

3. The double-pedal control system of an electric forklift according to claim 2, characterized in that: A pin shaft (7) is fixedly arranged on the bottom end surface of the pedal mounting frame (3), and an axial hole is opened at the center of the connecting rod (4), and the connecting rod (4) is movably sleeved on the pin shaft (7) through the axial hole.

4. The double-pedal control system of an electric forklift according to claim 2, characterized in that: A rotating rod (6) is respectively installed at the bottom end of the forward pedal (1) and the backward pedal (2), and the bottom end of the rotating rod (6) passes through the pedal mounting frame (3) and is hinged to the movable rod (5).

Images