A control method for a logistics industrial vehicle

Abstract

The present application relates to the technical field of industrial vehicles, and discloses a control method of a logistics industrial vehicle, which comprises a chassis assembly, a portal assembly and a control assembly, the portal assembly comprises a portal located at the front side of the chassis and a liftable fork arranged on the portal, whether the fork is located at a low position can be detected through a first induction switch, when the fork is located at the low position, a control unit controls a driving wheel set to keep a slow mode with the highest speed of 6km / h, when the fork is located at a high position, whether a speed switching button is in a continuously pressed state is judged, if not, the control unit still controls the driving wheel set to keep the slow mode, if yes, the control unit controls the driving wheel set to keep a fast mode with the speed of 13km / h, two conditions of the fork being located at the high position and the speed switching button being continuously pressed are needed to start the fast mode, which can protect the vehicle, avoid the fast impact caused by the operator falling down or other misoperations, and further improve the safety performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of logistics industrial vehicles, in particular to a control method of a logistics industrial vehicle. BACKGROUND

[0002] With the rapid development of modern logistics industry, the demand for automated warehousing and logistics center to improve work efficiency and reduce labor costs is increasing. As an important part of automated warehousing and logistics center, the performance of logistics industrial vehicles directly affects the efficiency and safety of logistics operations. Existing logistics industrial vehicles, such as forklifts, usually need operators to manually adjust the speed of the vehicle when handling goods in order to ensure safety, especially when the forks are at a low position or the vehicle is turning. When the forks are at a low position, they are prone to friction and impact with the ground, so the speed needs to be reduced to avoid damage to the vehicle or dangerous accidents. Similarly, during vehicle turning, if the vehicle speed is too fast, it may cause tipping and people to be thrown out, so the operator needs to control it by pressing the brake.

[0003] However, there are the following risks in the manual control of the operator: 1. It is greatly affected by the subjective consciousness of the operator, and some operators still maintain a high speed when they need to reduce the speed; 2. If the operator falls down by accident when the forks are at a low position, the vehicle can still maintain the original speed, which can cause great damage due to the uncontrollable speed. SUMMARY

[0004] The present application is made in consideration of the foregoing problems, and the purpose of the application is to provide a control method of a logistics industrial vehicle, which can automatically limit the speed and avoid safety accidents caused by operator misoperation by detecting the height of the forks and switching the fast mode and slow mode of the vehicle according to whether the speed switch button is pressed.

[0005] To achieve the above-mentioned purpose, the present application provides a control method of a logistics industrial vehicle, which further comprises a chassis assembly, a front frame assembly and a control assembly. The chassis assembly comprises a chassis and a driving wheel set located at the bottom of the chassis. The front frame assembly comprises a front frame located at the front side of the chassis and a fork arranged on the front frame in a lifting manner. A first sensing switch is arranged on the front frame at a first preset height. A first sensing sheet is arranged on the fork. When the horizontal height of the fork is equal to or lower than the first preset height, the first sensing sheet can be connected with the first sensing switch. The control assembly comprises a control unit and a speed switch button. The control unit is electrically connected with the speed switch button, the first sensing switch and the driving wheel set. The control method comprises the following steps:

[0006] The first inductive switch and the first inductive sheet are connected to determine whether the horizontal height of the forks is higher than the first preset height, and the information is fed back to the control unit.

[0007] If the horizontal height of the forks is lower than or equal to the first preset height, the control unit controls the drive wheel set to be in a slow mode, and limits the highest speed of the drive wheel set to be the first preset speed; if the horizontal height of the forks is higher than the first preset height, it is determined whether the speed switching button is in a continuous pressing state, if not, the control unit controls the drive wheel set to be in the slow mode, and limits the highest speed of the drive wheel set to be the first preset speed, if yes, the control unit controls the drive wheel set to be in a fast mode, and limits the highest speed of the drive wheel set to be a second preset speed, wherein the second preset speed is greater than the first preset speed.

[0008] According to the control method of the logistics industrial vehicle, the first preset speed is 6km / h, and the second preset speed is 13km / h.

[0009] According to the control method of the logistics industrial vehicle, the first preset height is 50mm.

[0010] According to the control method of the logistics industrial vehicle, the frame assembly further comprises a hydraulic power unit for driving the forks to perform lifting movement, the front frame is provided with a limit inductive switch, and the forks are further provided with a second inductive sheet; the control method further comprises:

[0011] When the hydraulic power unit drives the forks to be in a lifting state, if the second inductive sheet contacts the limit inductive switch, the limit inductive switch feeds back a signal to the control unit, and the control unit controls the hydraulic power unit to cut off power to limit the forks from continuing to rise.

[0012] According to the control method of the logistics industrial vehicle, the control assembly further comprises a lifting button and a lowering button, and the lifting button and the lowering button are electrically connected with the hydraulic power unit.

[0013] According to the control method of the logistics industrial vehicle, the drive wheel set comprises a drive wheel rotatably connected with the bottom of the chassis and two driven wheels respectively located at the front ends of the two forks, and the control unit is electrically connected with the drive wheel.

[0014] The control method of the logistics industrial vehicle further comprises a steering assembly, the vehicle frame assembly comprises a rear vehicle frame at the rear side of the chassis, the steering assembly comprises a steering handle, a steering shaft, a steering plate and a connecting plate, the steering shaft is rotatably fixed on the rear vehicle frame, the steering handle is connected with the upper end of the steering shaft, the steering plate is connected with the lower end of the steering shaft, and the connecting plate is used for connecting the steering plate and the driving wheel.

[0015] The control method of the logistics industrial vehicle further comprises a sensor, the sensor is fixed on the rear vehicle frame and electrically connected with the control unit, one end of the sensor is located at one side of the steering plate, the steering plate is provided with a first limit part and a second limit part which are arranged at intervals, and the first limit part and the second limit part can abut against the sensor when the steering plate rotates by a first preset angle clockwise or counterclockwise.

[0016] When the first limit part or the second limit part abuts against the sensor, the sensor feeds back a signal to the control unit, the control unit controls the driving wheel to be in a low-speed mode, and the maximum speed of the driving wheel is limited to 5 km / h.

[0017] The control method of the logistics industrial vehicle further comprises a steering handle, the steering handle comprises a handle rudder, a handle rod and a handle seat, the handle rudder is fixed on the upper end of the handle rod, the lower end of the handle rod is welded with the handle seat, the handle seat is sleeved on the outer side of the upper end of the steering shaft and detachably connected with the steering shaft through a flat key.

[0018] The control method of the logistics industrial vehicle further comprises a mounting seat and a rotating seat, the mounting seat is fixed on the bottom of the chassis, the driving wheel is rotatably connected with the mounting seat through the rotating seat, one end of the connecting plate is connected with the steering plate, and the other end of the connecting plate is connected with the rotating seat.

[0019] The control method of the logistics industrial vehicle has the following beneficial effects:

[0020] 1. The first induction switch can detect whether the forks are in a low position, when the forks are in the low position, the control unit controls the driving wheel set to keep a slow mode with a maximum speed of 6 km / h, when the forks are in a high position, it is judged whether the speed switching button is in a continuous pressing state, if not, the control unit still controls the driving wheel set to keep the slow mode, if yes, the control unit controls the driving wheel set to keep a fast mode with a speed of 13 km / h, two conditions of the forks being in the high position and the speed switching button being continuously pressed are needed to start the fast mode, which can protect the vehicle and avoid fast impact caused by the operator falling down or other misoperations, and further improve the safety performance.

[0021] 2. The front frame is further provided with a limit sensing switch. When the hydraulic power unit drives the fork to lift, and the second sensing sheet of the fork is in contact with the limit sensing switch, the control unit can control the hydraulic power unit to cut off the power, so as to avoid the working of the lifting hydraulic power unit in the overflow state, thereby avoiding the generation of noise and the consumption of electric energy.

[0022] 3. In the steering process of the vehicle, when the rotation exceeds the preset angle, the first limit part or the second limit part on the steering plate is in contact with the sensor, and the control unit can control the drive wheel group to be in the low-speed mode, and the vehicle travels at the highest speed limit of 5 km / h, so as to hard reduce the vehicle speed in the turning process and reduce the probability of safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of the overall structure of the embodiment;

[0024] Figure 2 is an enlarged structural schematic view of A of Figure 1

[0025] Figure 3 is a side view of the overall structure of the embodiment;

[0026] Figure 4 is a rear view of the assembly of the front frame and the fork of the embodiment;

[0027] Figure 5 is a sectional view of the steering assembly of the embodiment;

[0028] Figure 6 is an assembly view of the steering plate and the sensor of the embodiment.

[0029] In the drawings:

[0030] 100, chassis assembly; 110, chassis; 120, drive wheel group; 121, drive wheel; 122, driven wheel;

[0031] 200, frame assembly; 210, front frame; 211, first sensing switch; 212, limit sensing switch; 220, fork; 221, first sensing sheet; 222, second sensing sheet; 230, rear frame;

[0032] 300, control assembly; 310, speed switching button; 320, lifting button; 330, lowering button;

[0033] ​400, steering assembly; 410, steering handle; 411, handle rudder; 412, handle rod; 413, handle seat; 413a, flat key; 420, steering shaft; 430, steering plate; 431, first limit part; 432, second limit part; 440, connecting plate; 450, sensor; 460, mounting seat; 470, rotating seat. DETAILED DESCRIPTION

[0034] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0035] As shown in the drawings, a logistics industrial vehicle includes a chassis assembly 100, a frame assembly 200, a control assembly 300, and a steering assembly 400. Figures 1-6

[0036] The chassis assembly 100 includes a chassis 110 and a drive wheel set 120 at the bottom of the chassis 110. The front frame 210 assembly includes a front frame 210 at the front side of the chassis 110 and a liftable fork 220 arranged on the front frame 210. The front frame 210 is provided with a first sensing switch 211 at a first preset height. The fork 220 is provided with a first sensing sheet 221. When the horizontal height of the fork 220 is equal to or lower than the first preset height, the first sensing sheet 221 can be connected with the first sensing switch 211. The control assembly 300 includes a control unit and a speed switch button 310. The control unit is electrically connected with the speed switch button 310, the first sensing switch 211, and the drive wheel set 120.

[0037] A control method of a logistics industrial vehicle includes:

[0038] First, whether the horizontal height of the fork 220 is higher than the first preset height is determined by whether the first sensing switch 211 is connected with the first sensing sheet 221, and the information is fed back to the control unit. In this embodiment, the height of the fork 220 higher than the first preset height is defined as a high position, and the height of the fork 220 lower than or equal to the first preset height is defined as a low position. When the first sensing sheet 221 is connected with the first sensing switch 211, it is proved that the fork 220 is lowered to the low position. At this time, the first sensing switch 211 sends a signal feedback to the control unit. The control unit receives the position signal that the fork 220 is in the low position. If the first sensing sheet 221 is separated from the first sensing switch 211, the fork 220 is in the high position at this time. At this time, the control unit determines that the fork 220 is in the high position and proceeds to the next step.

[0039] ​Secondly, if the horizontal height of the forks 220 is lower than or equal to the first preset height, i.e. in the low position, the control unit controls the drive wheel set 120 to be in the slow mode, and limits the maximum speed of the drive wheel set 120 to the first preset speed, i.e. when the forks 220 are in the low position, the drive wheel set 120 can only remain in the slow mode regardless of whether the speed switching button 310 is pressed, to avoid high-speed friction and collision of the forks 220 with the ground, and thus avoid damage to the vehicle due to high-speed collision and the resulting safety accidents; if the horizontal height of the forks 220 is higher than the first preset height, it is determined whether the speed switching button 310 is in a continuous pressing state, if not, the control unit controls the drive wheel set 120 to be in the slow mode, and limits the maximum speed of the drive wheel set 120 to the first preset speed, if yes, the control unit controls the drive wheel set 120 to be in the fast mode, and limits the maximum speed of the drive wheel set 120 to the second preset speed, and even if the forks 220 are in the high position, the drive wheel set 120 cannot still adopt the fast mode, and it can only be switched to the fast mode by the operator pressing the speed switching button 310 simultaneously, so that the maximum speed is increased, thus safety accidents caused by misoperation of the operator when the forks 220 are in the high position can be avoided, such as when the forks 220 are in the high position, if the operator's foot is always on the accelerator, but when the vehicle shakes and the hands are separated from the control device, the control unit automatically controls the drive wheel set 120 to enter the slow mode when the speed switching button 310 is also separated, to avoid high-speed collision, wherein the speed of the drive wheel set 120 is consistent with the driving speed of the vehicle, and the second preset speed is greater than the first preset speed.

[0040] Specifically, the first preset speed is 6 km / h, and the second preset speed is 13 km / h, which is suitable for long-distance transportation, and the first preset speed is suitable for short-distance driving before picking up goods, and the first preset height is 50 mm, and when the forks 220 are lower than the height, the vehicle is kept in a slow driving state by controlling the drive wheel set 120.

[0041] In order to avoid continuous noise caused by the upper limit position, the frame assembly 200 further comprises a hydraulic power unit for driving the forks 220 to move up and down, the front frame 210 is provided with a limit sensing switch 212, the limit sensing switch 212 is electrically connected with the control unit, and the second sensing sheet 222 is arranged on the forks 220, and when the hydraulic power unit drives the forks 220 to be in the lifting state, if the second sensing sheet 222 contacts with the limit sensing switch 212, it proves that the forks 220 have risen to the upper limit position at this time, the limit sensing switch 212 feeds back the signal to the control unit, and the control unit controls the hydraulic power unit to cut off the power to limit the forks 220 from continuing to rise, thereby avoiding the hydraulic power unit in the lifting state from being in a continuous overflow state, and thus avoiding the generation of noise and energy consumption.

[0042] In the embodiment, the horizontal height of the second induction sheet 222 is lower than that of the first induction sheet 221 and the limit induction switch 212, and the lowest horizontal height of the first induction sheet 221 is higher than that of the limit induction switch 212, so as to avoid false touch.

[0043] In order to control the lifting of the forks 220, the control assembly 300 further comprises a lifting button 320 and a lowering button 330, both of which are electrically connected with the hydraulic power unit, and the lifting button 320 and the lowering button 330 control the lifting or lowering of the forks 220 through the control unit, wherein when the forks 220 are lifted to the limit position and the power of the hydraulic power unit is cut off, even if the lifting button 320 is pressed, the power cannot be continuously output.

[0044] Specifically, the drive wheel set 120 comprises a drive wheel 121 rotatably connected with the bottom of the chassis 110 and two driven wheels 122 respectively located at the front ends of the two forks 220, the control unit is electrically connected with the drive wheel 121, the two driven wheels 122 are universal wheels, the drive wheel 121 is provided with a drive motor, and the driving speed of the drive wheel 121 is controlled by applying a signal to the drive motor.

[0045] Specifically, the vehicle frame assembly 200 comprises a rear vehicle frame 230 located on the rear side of the chassis 110, the steering assembly 400 comprises a steering handle 410, a steering shaft 420, a steering plate 430 and a connecting plate 440, the steering shaft 420 is rotatably fixed on the rear vehicle frame 230, the steering handle 410 is connected with the upper end of the steering shaft 420, the steering plate 430 is connected with the lower end of the steering shaft 420, the connecting plate 440 is used to connect the steering plate 430 and the drive wheel 121, the steering handle 410 can drive the steering shaft 420 to rotate, the steering shaft 420 drives the steering plate 430 to rotate, and then drives the connecting plate 440 to rotate, and drives the drive wheel 121 to rotate through the connecting plate 440, so as to realize the steering of the whole vehicle.

[0046] In order to improve the safety performance in the steering process, the steering assembly 400 further comprises a sensor 450 fixed on the rear frame 230 and electrically connected with the control unit, and one end of the sensor 450 is located on one side of the steering plate 430, and the steering plate 430 is provided with a first limit portion 431 and a second limit portion 432 arranged at intervals, when the steering plate 430 rotates by a first preset angle clockwise or counterclockwise, the first limit portion 431 and the second limit portion 432 can abut against the sensor 450, then when the first limit portion 431 or the second limit portion 432 abuts against the sensor 450, the sensor 450 feeds back a signal to the control unit, the control unit controls the driving wheel 121 to be in a low speed mode, and limits the maximum speed of the driving wheel 121 to 5km / h, further reduces the speed during steering, improves the safety performance of operation, avoids throwing people or collision caused by high speed, and at the same time, the steering needs to exceed the first preset angle to limit the speed, avoids limiting the speed when slightly deviating from the direction, and improves the stability of movement.

[0047] Specifically, the steering handle 410 comprises a handle rudder 411, a handle rod 412 and a handle seat 413, the handle rudder 411 is fixed on the upper end of the handle rod 412, the lower end of the handle rod 412 is welded with the handle seat 413, the handle seat 413 is sleeved on the outside of the upper end of the steering shaft 420 and is detachably connected with the steering shaft 420 through a flat key 413a, wherein the handle rudder 411 drives the handle rod 412 to rotate and drives the steering shaft 420 to rotate through the handle seat 413, and the flat key 413a can ensure the detachability of the handle seat 413 and the steering shaft 420 and can also drive the steering shaft 420 to rotate.

[0048] In order to realize the rotatable installation of the driving wheel 121, the steering assembly 400 further comprises a mounting seat 460 and a rotary seat 470, the mounting seat 460 is fixed on the bottom of the chassis 110, the driving wheel 121 is rotatably connected with the mounting seat 460 through the rotary seat 470, one end of the connecting plate 440 is connected with the steering plate 430, the other end of the connecting plate 440 is connected with the rotary seat 470, the rotary seat 470 is rotatably connected with the mounting seat 460, and the driving wheel 121 is fixed on the bottom of the rotary seat 470, so that the connecting plate 440 only needs to drive the rotary seat 470 to realize the steering of the driving wheel 121, in the embodiment, the two ends of the connecting plate 440 are detachably connected with other components through bolts, which is beneficial to overall assembly and disassembly and maintenance.

[0049] The technical solutions of the present application are described in detail above with reference to the drawings, and the described embodiments are used to help understand the idea of the present application. The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0051] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for descriptive purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

Claims

1. A control method of a material handling industrial vehicle, characterized by, The logistics industrial vehicle further comprises a chassis assembly, a frame assembly and a control assembly, the chassis assembly comprises a chassis and a driving wheel set at the bottom of the chassis, the frame assembly comprises a front frame at the front side of the chassis and a liftable fork arranged on the front frame, the front frame is provided with a first sensing switch at a first preset height, the fork is provided with a first sensing sheet, when the horizontal height of the fork is equal to or lower than the first preset height, the first sensing sheet can be in contact with the first sensing switch, the control assembly comprises a control unit and a speed switch button, the control unit is in electrical signal connection with the speed switch button, the first sensing switch and the driving wheel set, the control method comprises: whether the horizontal height of the fork is higher than the first preset height is determined by whether the first sensing switch is in contact with the first sensing sheet, and information is fed back to the control unit; if the horizontal height of the fork is lower than or equal to the first preset height, the control unit controls the driving wheel set to be in a slow mode, and limits the highest speed of the driving wheel set to be a first preset speed, if the horizontal height of the fork is higher than the first preset height, whether the speed switch button is in a continuous pressing state is determined, if not, the control unit controls the driving wheel set to be in the slow mode, and limits the highest speed of the driving wheel set to be the first preset speed, if yes, the control unit controls the driving wheel set to be in a fast mode, and limits the highest speed of the driving wheel set to be a second preset speed, wherein the second preset speed is greater than the first preset speed.

2. The control method of claim 1, wherein, The first preset speed is 6km / h, and the second preset speed is 13km / h.

3. The control method of claim 1, wherein, The first preset height is 50mm.

4. The control method of claim 1, wherein, The frame assembly further comprises a hydraulic power unit for driving the fork to move up and down, the front frame is provided with a limit sensing switch, and the fork is further provided with a second sensing sheet, the control method further comprises: when the hydraulic power unit drives the fork to be in a lifting state, if the second sensing sheet is in contact with the limit sensing switch, the limit sensing switch feeds a signal to the control unit, and the control unit controls the hydraulic power unit to cut off power to limit the fork from continuing to rise.

5. The control method of claim 4, wherein, The control assembly further comprises a lifting button and a lowering button, the lifting button and the lowering button are in electrical signal connection with the hydraulic power unit.

6. The control method of a material handling vehicle of claim 1, wherein, The driving wheel set comprises driving wheels rotatably connected with the bottom of the chassis and two driven wheels respectively located at the front ends of the two forks, the control unit is in electrical signal connection with the driving wheels.

7. The control method of claim 6, wherein, The logistics industrial vehicle further comprises a steering assembly, the frame assembly further comprises a rear frame at the rear side of the chassis, the steering assembly comprises a steering handle, a steering shaft, a steering plate and a connecting plate, the steering shaft is rotatably fixed on the rear frame, the steering handle is connected with the upper end of the steering shaft, the steering plate is connected with the lower end of the steering shaft, and the connecting plate is used for connecting the steering plate and the driving wheels.

8. The control method of claim 7, wherein, The turning assembly further comprises a sensor fixed on the rear frame and electrically connected with the control unit, and one end of the sensor is located on one side of the turning plate, and the turning plate is provided with a first limit part and a second limit part arranged at intervals, and when the turning plate rotates by a first preset angle clockwise or counterclockwise, the first limit part and the second limit part can abut against the sensor. The control method further comprises: When the first limit part or the second limit part abuts against the sensor, the sensor feeds back a signal to the control unit, the control unit controls the driving wheel to be in a low-speed mode, and the maximum speed of the driving wheel is limited to 5 km / h.

9. The control method of claim 7, wherein, The turning handle comprises a handle rudder, a handle rod and a handle seat, the handle rudder is fixed on the upper end of the handle rod, the lower end of the handle rod is welded with the handle seat, the handle seat is sleeved on the outside of the upper end of the turning shaft and detachably connected with the turning shaft through a flat key.

10. The control method of claim 7, wherein, The turning assembly further comprises a mounting seat and a rotary seat, the mounting seat is fixed on the bottom of the chassis, the driving wheel is rotatably connected with the mounting seat through the rotary seat, one end of the connecting plate is connected with the turning plate, and the other end of the connecting plate is connected with the rotary seat.

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