Force limiting electric control system

Abstract

The utility model discloses a force limiting electric control system, and aims to provide a force limiting electric control system which solves the influence of the lifting capacity on the stability of a whole vehicle in the engineering machinery and agricultural machinery industries. The system comprises a power controller which is used for providing a stable power supply for the control system; the controller is connected with a control valve block and is electrically connected with the power controller; the operating handle is electrically connected with the controller; the force limiter is electrically connected with the controller; the force limit display is electrically connected with the controller; the big arm oil cylinder group is electrically connected with the control valve block; and the accessory oil cylinder group is electrically connected with the control valve block. The utility model has the beneficial effects that the influence of the lifting capacity on the stability of the whole vehicle in engineering machinery and agricultural machinery industries is solved, and the stability of the whole vehicle is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of engineering machinery technology, and in particular to a force-limiting power control system. Background Technology

[0002] In the fields of construction machinery technology and agricultural machinery operation, the lifting capacity of telescopic boom forklifts has a significant impact on the overall stability and safety of the vehicle. During traditional construction or agricultural machinery operations, overloading of telescopic boom forklifts can cause the entire vehicle to tilt and overturn, resulting in dangerous situations and injuries to personnel, property, and individuals. Utility Model Content

[0003] The present invention aims to overcome the aforementioned deficiencies in the prior art and provides a force-limiting electrical control system that addresses the impact of lifting capacity on the stability of the entire vehicle in the engineering and agricultural machinery industries.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A force-limiting power control system, including

[0006] A power controller is used to provide a stable power supply to the control system.

[0007] The controller, which is connected to the control valve block and electrically connected to the power controller, serves as a control unit to receive input signals and output control signals through the control valve block.

[0008] The operating handle is electrically connected to the controller and is used to input external control action signals to the controller.

[0009] The force limiter, electrically connected to the controller, is used to input the vehicle axle deformation signal to the controller;

[0010] The force limit display is electrically connected to the controller and is used to collect the data of the force limiter and compare it with the preset data in the controller to output a control signal.

[0011] The boom cylinder assembly is electrically connected to the control valve block and is used to receive boom lifting and extension signals output by the controller.

[0012] The attachment cylinder assembly is electrically connected to the control valve block and is used to receive attachment tilting and lifting signals output by the controller.

[0013] When the attachment connected to the boom bears the rated load, the force limiter installed on the vehicle axle sends a feedback signal to the force limit display and exchanges data with the controller. The force limit display synchronously records the corresponding data for the rated load. When the external load on the attachment exceeds the rated load, the force limiter installed on the vehicle axle collects the changes in bridge surface force and stress on the vehicle axle. The force limit display receives the stress change data sent by the force limiter and, combined with the load threshold preset by the controller, sends corresponding action limits to the controller. This prevents the vehicle from overturning due to excessive external load, thus solving the problem of the lifting capacity affecting the overall stability of the vehicle in the construction and agricultural machinery industries, and greatly improving the overall stability of the vehicle.

[0014] Preferably, the control valve block is equipped with a boom lifting solenoid valve group, a boom telescopic solenoid valve group, an attachment tilting solenoid valve group, and an attachment lifting solenoid valve group. The boom cylinder group includes a boom lifting cylinder and a boom telescopic cylinder. The attachment cylinder group includes an attachment tilting cylinder and an attachment lifting cylinder. The control valve block is electrically connected to the boom lifting cylinder through the boom lifting solenoid valve group, the boom telescopic cylinder through the boom telescopic solenoid valve group, the attachment tilting cylinder through the attachment tilting solenoid valve group, and the attachment lifting cylinder through the attachment lifting solenoid valve group.

[0015] Preferably, the vehicle includes wheels, axles, a frame, a control room, a boom, and attachments. The wheels are mounted on the axles, the frame is mounted on the axles, the boom is mounted in the middle of the frame, the control room is mounted on the frame and located on one side of the boom, the attachments are detachably mounted on one end of the boom, the power controller is mounted on the frame, the controller is mounted on the boom and located near the attachment, the operating handle and force limiter display are mounted in the control room, the force limiter is mounted on the axles, the boom cylinder assembly is mounted on the boom, and the attachment cylinder assembly is mounted on the attachments.

[0016] Preferably, the force limiter is a tensile force sensor, and the mounting surface of the force limiter is flatly attached to the mounting surface of the axle by applying solid adhesive.

[0017] Preferably, the force limiter, force limit display and operating handle are all electrically connected to the controller via a CAN bus.

[0018] The beneficial effects of this utility model are: it solves the problem of the impact of lifting capacity on the stability of the entire vehicle in the engineering machinery and agricultural machinery industries, and greatly improves the stability of the entire vehicle. Attached Figure Description

[0019] Figure 1 This is the electrical schematic diagram of this utility model;

[0020] Figure 2 , Figure 3 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Controller, 2. Force limiter display, 3. Operating handle, 4. Force limiter, 5. Control valve block, 6. Power controller, 7. Boom, 8. Attachment. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 In the described embodiments, a force-limiting power control system includes:

[0024] Power controller 6 is used to provide a stable power supply to the control system;

[0025] Controller 1 is connected to control valve block 5 and electrically connected to power controller 6. It serves as a control unit to receive input signals and output control signals through control valve block 5.

[0026] The operating handle 3 is electrically connected to the controller 1 and is used to input external control action signals to the controller 1.

[0027] Force limiter 4 is electrically connected to controller 1 and is used to input vehicle axle deformation signal to controller 1;

[0028] Force limit display 2 is electrically connected to controller 1 and is used to collect data from force limiter 4 and compare it with preset data in controller 1 to output control signal;

[0029] The boom cylinder assembly is electrically connected to the control valve block 5 and is used to receive boom lifting and extension signals output by the controller 1.

[0030] The attachment cylinder assembly is electrically connected to the control valve block 5 and is used to receive attachment tilting and lifting signals output by the controller 1.

[0031] The control valve block 5 contains a boom lifting solenoid valve group, a boom telescopic solenoid valve group, an attachment tilting solenoid valve group, and an attachment lifting solenoid valve group. The boom cylinder group includes a boom lifting cylinder and a boom telescopic cylinder. The attachment cylinder group includes an attachment tilting cylinder and an attachment lifting cylinder. The control valve block 5 is electrically connected to the boom lifting cylinder via the boom lifting solenoid valve group, the boom telescopic cylinder via the boom telescopic solenoid valve group, the attachment tilting cylinder via the attachment tilting solenoid valve group, and the attachment lifting cylinder via the attachment lifting solenoid valve group. The force limiter 4, the force limit display 2, and the operating handle 3 are all electrically connected to the controller 1 via a CAN bus.

[0032] like Figure 2 , Figure 3 As shown, the vehicle includes wheels, axles, a frame, a control room, a boom 7, and attachments 8. The wheels are mounted on the axles, the frame is mounted on the axles, the boom 7 is mounted in the middle of the frame, the control room is mounted on the frame and located to one side of the boom 7, the attachment 8 is detachably mounted on one end of the boom 7, the power controller 6 is mounted on the frame, the controller 1 is mounted on the boom 7 and located near the attachment 8, the operating handle 3 and the force limit display 2 are mounted in the control room, the force limiter 4 is mounted on the axles, the boom cylinder assembly is mounted on the boom 7, and the attachment cylinder assembly is mounted on the attachment 8. The force limiter 4 is a tension force sensor, and its mounting surface is smoothly attached to the corresponding mounting surface of the axle using solid adhesive.

[0033] The specific implementation is as follows:

[0034] The control system consists of the following parts: a power controller 6 that supplies power to the control system, providing a stable power supply; an operating handle 3 that controls external action signals input to the controller 1, which, upon receiving the external signal, outputs a control signal to the boom lifting solenoid valve group (including boom lifting and boom lowering solenoid valves) and boom extension solenoid valve group (including boom extension and boom retraction solenoid valves) in the valve block 5, thereby causing the boom 7 to lift and lower, realizing the extension and retraction of the boom 7; synchronously, upon receiving the external signal, the controller 1 outputs a control signal to the attachment flipping solenoid valve group (including attachment flipping solenoid valve and lock flipping solenoid valve) and attachment lifting solenoid valve group (including attachment lifting and attachment lowering solenoid valves) in the valve block 5, causing the attachment 8 at the front end of the boom 7 to flip up or down, and causing the attachment 8 to lift or lower.

[0035] When attachment 8 bears the rated load, the force limiter 4 installed on the vehicle axle (Note: the force limiter is a tensile force sensor, and installation requires strict standards; the mounting surface must be flat, smooth, and free of defects to ensure tight contact between the tensile force sensor and the mounting surface. Solid adhesive is applied before installation to reinforce the fixation) sends a feedback signal to the force limit display 2 and simultaneously exchanges data with the controller 1. The force limit display 2 also records the corresponding data for the rated load. When the external load on the attachment exceeds the rated load, the force limiter 4 installed on the vehicle axle sends the collected data to the controller 1 based on changes in bridge force and stress. The force limit display 2 receives the force change corresponding to the force limiter 4 from the controller 1, compares it with the pre-set load threshold in the controller 1, and sends the comparison result back to the controller 1. The controller 1 then sends corresponding action limits based on the comparison result, thereby preventing the vehicle from overturning due to excessive external load and affecting the overall stability of the vehicle.

[0036] The control system is composed of Figure 1 The electrical schematic diagram shows that force limiter 4 is an input signal element, and the signal it collects comes from the vehicle axle (e.g., the axle of the vehicle being installed). Figure 2 , Figure 3 As shown), the vehicle axle deforms due to changes in external load, causing electrical changes in the force limiter 4. The force limiter display 2 acquires the collected electrical parameters of the force limiter 4 and performs rated load calibration. Simultaneously, it compares the preset load threshold in the controller 1 with the actual load value collected by the force limiter 4, and outputs corresponding control logic based on the comparison result (where the control logic is preset within the controller 1; for example, if the collected value is less than the preset value, normal operation occurs; if the collected value is greater than the preset value, control is applied to the boom and attachments). This logic is then used to execute external commands. The components (boom cylinder assembly and attachment cylinder assembly) output signals, and the control valve block 5 outputs signals to the corresponding solenoid valves. The boom lifting solenoid valve assembly (including boom lifting solenoid valve and boom lowering solenoid valve) controls the lifting and lowering of the boom lifting cylinder; the boom extension solenoid valve assembly (including boom extension solenoid valve and boom retraction solenoid valve) controls the extension and retraction of the boom extension cylinder; the attachment tilting solenoid valve assembly (including attachment tilting solenoid valve and lock tilting solenoid valve) controls the tilting and lowering of the attachment tilting cylinder; and the attachment lifting solenoid valve assembly (including attachment lifting solenoid valve and attachment lowering solenoid valve) controls the lifting and lowering of the attachment lifting cylinder. When the external load on the attachment 8 exceeds the vehicle's preset rated load, a signal is sent to the force limit display 2 via the force limiter 4. The force limit display 2 makes an action judgment and communicates with the controller 1 via the CAN communication protocol. The controller 1 makes a judgment and outputs a signal.

Claims

1. A force-limited electric control system, characterized by, include A power controller (6) is used to provide a stable power supply to the control system. The controller (1) is connected to the control valve block (5) and electrically connected to the power controller (6). It serves as a control unit to receive input signals and output control signals through the control valve block (5). The operating handle (3) is electrically connected to the controller (1) and is used to input external control action signals to the controller (1). Force limiter (4) is electrically connected to controller (1) and is used to input vehicle axle deformation signal to controller (1). Force limit display (2) is electrically connected to controller (1) and is used to collect data from force limiter (4) and compare it with preset data in controller (1) to output control signal; The boom cylinder assembly is electrically connected to the control valve block (5) and is used to receive boom lifting and extension signals output by the controller (1); The attachment cylinder assembly is electrically connected to the control valve block (5) and is used to receive attachment flipping and lifting signals output by the controller (1).

2. A force-limited electrical control system according to claim 1, wherein, The control valve block (5) is equipped with a boom lifting solenoid valve group, a boom telescopic solenoid valve group, an attachment tilting solenoid valve group, and an attachment lifting solenoid valve group. The boom cylinder group includes a boom lifting cylinder and a boom telescopic cylinder. The attachment cylinder group includes an attachment tilting cylinder and an attachment lifting cylinder. The control valve block (5) is electrically connected to the boom lifting cylinder through the boom lifting solenoid valve group. The control valve block (5) is electrically connected to the boom telescopic cylinder through the boom telescopic solenoid valve group. The control valve block (5) is electrically connected to the attachment tilting cylinder through the attachment tilting solenoid valve group. The control valve block (5) is electrically connected to the attachment lifting cylinder through the attachment lifting solenoid valve group.

3. A force-limited electrical control system according to claim 1 or 2, characterised in that, The vehicle includes wheels, axles, a frame, a control room, a boom (7), and attachments (8). The wheels are mounted on the axles, the frame is mounted on the axles, the boom (7) is mounted in the middle of the frame, the control room is mounted on the frame and placed on one side of the boom (7), the attachments (8) are detachably mounted on one end of the boom (7), the power controller (6) is mounted on the frame, the controller (1) is mounted on the boom (7) and placed near the attachments (8), the operating handle (3) and the force limit display (2) are mounted in the control room, the force limiter (4) is mounted on the axles, the boom cylinder assembly is mounted on the boom (7), and the attachment cylinder assembly is mounted on the attachments (8).

4. A force-limited electrical control system according to claim 3, wherein, The force limiter (4) is a tension force sensor. The mounting surface of the force limiter (4) is flat and attached to the mounting surface of the axle by applying solid glue.

5. A force-limited electrical control system according to claim 1 or 2, characterised in that The force limiter (4), force limit display (2) and operating handle (3) are all electrically connected to the controller (1) via CAN bus.

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