Electric forklift handrail hydraulic integrated system

Abstract

The utility model discloses an electric forklift handrail hydraulic integrated system, and particularly relates to the technical field of electric forklifts. The system comprises an armrest system, a seat switch, a proportional valve controller, a hydraulic driving system and a vehicle controller. The armrest system is respectively connected with the proportional valve controller and the vehicle controller; the proportional valve controller is in signal connection with the hydraulic driving system, and the vehicle controller is in signal connection with the hydraulic driving system; one end of the seat switch is in signal connection with the proportional valve controller and the vehicle controller. According to the utility model, the fingertip switch is triggered through the armrest system, so that the hydraulic driving system controls the accessory, and the stability and reliability of fingertip stroke output are ensured; a fingertip stroke CAN message signal sent by an armrest system and a working enable signal sent by a proportional valve controller are received through a vehicle controller, the vehicle controller and the proportional valve controller send a hydraulic driving signal and a proportional valve control signal to a hydraulic driving system respectively, and the hydraulic system works as needed; and the cooperative work problem is solved.

Description

Technical Field

[0001] This utility model relates to the field of electric forklift technology, and more specifically, to an integrated hydraulic system for electric forklift handlebars. Background Technology

[0002] It is known that high-voltage lithium-ion battery forklifts have better performance and more mature technology than ordinary electric forklifts. As a result, the market demand for high-voltage lithium-ion battery forklifts will continue to grow, leading to higher demands for driving and riding comfort. Among these, the configuration of forklift handles can greatly improve driving and riding comfort, hence the high demand.

[0003] However, in practical use, the complexity of controlling high-voltage lithium-ion battery-powered forklifts presents several challenges that need to be addressed:

[0004] 1. The reliability of the fingertip travel output and signal parsing of the forklift handrail system needs to be improved;

[0005] 2. Issues regarding the coordinated operation of the forklift grab handle system with the vehicle controller and hydraulic drive system;

[0006] Therefore, a hydraulic integrated system for electric forklift handles is proposed as a further improvement. Utility Model Content

[0007] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide an electric forklift handle hydraulic integrated system to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an electric forklift handrail hydraulic integrated system, the handrail hydraulic integrated system comprising: a handrail system, a seat switch, a proportional valve controller, a hydraulic drive system, and a vehicle controller;

[0009] The handrail system is connected to the proportional valve controller and the vehicle controller via a CAN bus.

[0010] The proportional valve controller is connected to the hydraulic drive system via signal, and the vehicle controller is also connected to the hydraulic drive system via signal.

[0011] One end of the seat switch is connected to the proportional valve controller and the vehicle controller signals, respectively.

[0012] Furthermore, the handrail system outputs fingertip travel CAN message signals to the proportional valve controller and the vehicle controller respectively via the CAN bus.

[0013] Furthermore, the seat switch outputs seat signals to the proportional valve controller and the vehicle controller, respectively.

[0014] Furthermore, the proportional valve controller outputs an enable signal to the vehicle controller.

[0015] Furthermore, the proportional valve controller and the vehicle controller respectively output proportional valve control signals and hydraulic drive signals to the hydraulic drive system.

[0016] Furthermore, the proportional valve controller used to control the attachment's movement is provided with at least four sets of solenoid valves, wherein the four sets of solenoid valves control the attachment's movements as follows: raising and lowering, expanding and tightening, left-hand rotation and right-hand rotation, and tilting forward and tilting backward.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] Compared with existing technologies, this utility model has a simple structure. By setting up a handrail system, four thumb operating levers trigger fingertip switches, which in turn control the electric forklift attachments through a hydraulic drive system, ensuring stable and reliable fingertip stroke output. By setting up a proportional valve controller, the vehicle controller needs to receive the correct fingertip stroke CAN message signal from the handrail system and the correct working enable signal from the proportional valve controller before it can send a hydraulic drive signal to the hydraulic drive system. At this time, after the proportional valve controller sends a proportional valve control signal to the hydraulic drive system, the hydraulic system works as needed. This solves the problem of coordinated operation of the handrail system, vehicle controller, and hydraulic drive system. Attached Figure Description

[0019] Figure 1 This is a system block diagram of the present invention.

[0020] The accompanying drawings are:

[0021] 1. Armrest system; 2. Seat switch; 3. Proportional valve controller;

[0022] 4. Hydraulic drive system; 5. Vehicle controller; 6. CAN bus. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] As attached Figure 1 The diagram shows an electric forklift handrail hydraulic integrated system, which includes: a handrail system 1, a seat switch 2, a proportional valve controller 3, a hydraulic drive system 4, and a vehicle controller 5;

[0025] Handrail system 1 is connected to proportional valve controller 3 and vehicle controller 5 via CAN bus 6 respectively;

[0026] The proportional valve controller 3 is connected to the hydraulic drive system 4 via signal, and the vehicle controller 5 is also connected to the hydraulic drive system 4 via signal.

[0027] One end of the seat switch 2 is connected to the proportional valve controller 3 and the vehicle controller 5 respectively.

[0028] When the driver is sitting correctly in the seat, the seat switch 2 closes, and the proportional valve controller 3 and the vehicle controller 5 receive the seat signal. The seat signal activates the proportional valve controller 3 and the vehicle controller 5. On the other hand, the armrest system 1 sends a fingertip travel CAN message signal, and then the proportional valve controller 3 and the vehicle controller 5 perform logical judgments and cooperate to control the hydraulic drive system 4, so that the hydraulic system works as needed.

[0029] The handrail system 1 includes four thumb levers and a CAN communication control bus matrix. The CAN message frame 0X18FF01 DC sends the position signals of the four thumb levers. byte1, byte3, byte5, and byte7 represent the fingertip positions of the thumb levers FTC1-FTC4, respectively. byte6 represents the scroll count value, and byte8 represents the check value.

[0030] The 8-byte data field based on CAN extended frame 0x18FF01 DC: byte 1, byte 2, byte 3, byte 4, byte 5, byte 6, byte 7, byte 8;

[0031] Bytes 1, 3, 5, and 7 represent the fingertip travel distance: 0x00-0x64 (fingertip trailing to median value), 0x64 (fingertip median value), 0x64-0xC8 (fingertip median to leading value), 0xFE (fingertip error value), and 0xFF (fingertip unavailable). Byte 6 represents the roll count, with the high 4 bits defaulting to 0 and the low 4 bits counting from 0 to 15. Byte 8 represents the checksum, using the SAE-J1850 CRC-8 algorithm.

[0032] In a preferred embodiment, as shown in the appendix Figure 1 As shown, the handrail system 1 outputs fingertip travel CAN message signals to the proportional valve controller 3 and the vehicle controller 5 respectively via the CAN bus 6.

[0033] When the proportional valve controller 3 receives the correct fingertip travel CAN message signal, it will control the proportional valve to work; and the proportional valve controller 3 sends a working enable signal to the vehicle controller 5. When the vehicle controller 5 receives the correct fingertip travel CAN message signal and the correct working enable signal, the vehicle controller 5 sends a hydraulic drive signal to the hydraulic drive system 4, at which time the hydraulic drive system 4 works normally.

[0034] In a preferred embodiment, as shown in the appendix Figure 1 As shown, the seat switch 2 outputs seat signals to the proportional valve controller 3 and the vehicle controller 5, respectively.

[0035] When the driver is sitting correctly in the seat, the seat switch 2 closes, which in turn sends a seat signal to the proportional valve controller 3 and the vehicle controller 5.

[0036] In a preferred embodiment, as shown in the appendix Figure 1 As shown, the proportional valve controller 3 outputs an enable signal to the vehicle controller 5 so that the proportional valve controller 3 can control the vehicle controller 5.

[0037] The vehicle controller 5 is controlled by three signals: fingertip travel CAN message signal, seat signal, and work enable signal.

[0038] In a preferred embodiment, as shown in the appendix Figure 1 As shown, the proportional valve controller 3 and the vehicle controller 5 output proportional valve control signals and hydraulic drive signals to the hydraulic drive system 4, respectively.

[0039] Among them, the hydraulic drive system 4 provides power by controlling the oil pump to supply oil;

[0040] In a preferred embodiment, as shown in the appendix Figure 1 As shown, the proportional valve controller 3 used to control the action of the attachment is provided with at least four sets of solenoid valves, wherein the four sets of solenoid valves control the action of the attachment as follows: rising and falling, expanding and tightening, left and right rotation, and tilting forward and tilting backward.

[0041] Among them, vehicle controller 5 complies with functional safety certification.

[0042] Working principle of this utility model:

[0043] When the driver is properly seated, the seat switch 2 closes, and the proportional valve controller 3 and vehicle controller 5 receive a seat signal; the seat signal activates the proportional valve controller 3 and vehicle controller 5; on the other hand, the armrest system 1 sends a fingertip travel CAN message signal to the proportional valve controller 3 and vehicle controller 5.

[0044] When the proportional valve controller 3 receives the correct fingertip travel CAN message signal, it will control the proportional valve to work; and the proportional valve controller 3 will send an enable signal to the vehicle controller 5.

[0045] When the vehicle controller 5 receives the correct fingertip travel CAN message signal and the correct work enable signal, the vehicle controller 5 sends a hydraulic drive signal to the hydraulic drive system 4.

[0046] After the proportional valve controller 3 and the vehicle controller 5 perform logical judgments, they send proportional valve control signals and hydraulic drive signals to the hydraulic drive system 4 respectively; then the proportional valve controller 3 and the vehicle controller 5 cooperate to control the hydraulic drive system 4, so that the hydraulic system works as needed.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic integrated system for electric forklift handlebars, characterized in that: The armrest hydraulic integrated system includes: armrest system (1), seat switch (2), proportional valve controller (3), hydraulic drive system (4), and vehicle controller (5); The handrail system (1) is connected to the proportional valve controller (3) and the vehicle controller (5) respectively via the CAN bus (6); The proportional valve controller (3) is connected to the hydraulic drive system (4) by signal, and the vehicle controller (5) is connected to the hydraulic drive system (4) by signal. One end of the seat switch (2) is connected to the proportional valve controller (3) and the vehicle controller (5) respectively.

2. The electric forklift handle hydraulic integrated system according to claim 1, characterized in that: The handrail system (1) outputs fingertip travel CAN message signals to the proportional valve controller (3) and the vehicle controller (5) respectively via the CAN bus (6).

3. The electric forklift handle hydraulic integrated system according to claim 2, characterized in that: The seat switch (2) outputs seat signals to the proportional valve controller (3) and the vehicle controller (5), respectively.

4. The electric forklift handle hydraulic integrated system according to claim 3, characterized in that: The proportional valve controller (3) outputs an enable signal to the vehicle controller (5).

5. The electric forklift handle hydraulic integrated system according to claim 4, characterized in that: The proportional valve controller (3) and the vehicle controller (5) output proportional valve control signals and hydraulic drive signals to the hydraulic drive system (4), respectively.

6. The electric forklift handle hydraulic integrated system according to claim 1, characterized in that: The proportional valve controller (3) used to control the action of the attachment is provided with at least four sets of solenoid valves, wherein the four sets of solenoid valves control the action of the attachment as follows: rising and falling, expanding and tightening, left and right rotation, and tilting forward and tilting backward.

Images