阅读说明：本技术 越野叉车稳定性主动保护装置及具有其的越野叉车 (Active protection device for stability of cross-country forklift and cross-country forklift with active protection device ) 是由 钟志华 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种越野叉车稳定性主动保护装置,包括设置于叉车车身上且用于采集车身角度数据的角度传感器、设置于门架上且用于检测门架状态的位置传感器、多路阀以及用于接收角度传感器和位置传感器发送的信号且对信号进行处理和判断处理结果是否满足失稳条件的控制系统；当处理结果满足失稳条件,控制系统则发出警报并限制多路阀工作。本发明的越野叉车稳定性主动保护装置,既能有效、实时地的实现对越野叉车横向、纵向稳定性的监测并且能够反馈信息输出到越野叉车,发出相应警告及采取保护措施,防止越野叉车在失稳状态下继续整车作业,起到稳定性主动安全保护作用。本发明还公开了一种越野叉车。(The invention discloses an active protection device for the stability of a cross-country forklift, which comprises an angle sensor, a position sensor, a multi-way valve and a control system, wherein the angle sensor is arranged on a forklift body and used for acquiring angle data of the forklift body, the position sensor is arranged on a portal and used for detecting the state of the portal, the control system is used for receiving signals sent by the angle sensor and the position sensor, processing the signals and judging whether the processing result meets the instability condition; and when the processing result meets the instability condition, the control system gives an alarm and limits the operation of the multi-way valve. The active protection device for the stability of the cross-country forklift can effectively monitor the transverse and longitudinal stability of the cross-country forklift in real time, can feed back information to be output to the cross-country forklift, sends corresponding warning and takes protection measures to prevent the cross-country forklift from continuing to work in the whole forklift in a destabilization state, and plays a role in active safety protection of the stability. The invention also discloses a cross-country forklift.)

1. The active protection device for the stability of the cross-country forklift is characterized by comprising an angle sensor, a position sensor, a multi-way valve and a control system, wherein the angle sensor is arranged on a forklift body and used for acquiring angle data of the forklift body, the position sensor is arranged on a portal and used for detecting the state of the portal, and the control system is used for receiving signals sent by the angle sensor and the position sensor, processing the signals and judging whether the processing result meets the instability condition; and when the processing result meets the instability condition, the control system gives an alarm and limits the operation of the multi-way valve.

2. The active rough cross truck stability protection device of claim 1, wherein the angle sensor is bolted to the truck body.

3. Active protection device for the stability of a fork lift truck according to claim 1 or 2, characterized in that the angle sensor is a two-axis tilt sensor.

4. The active protection device for the stability of a cross-country forklift according to claim 1 or 2, further comprising a lift cylinder pressure sensor for detecting a lift cylinder pressure, the lift cylinder pressure sensor being electrically connected to the control system.

5. The active protection device for the stability of a cross-country forklift as claimed in claim 4, wherein when the pressure sensor of the lifting cylinder detects that the gantry is lifted and the position sensor detects that the gantry is in a horizontal state, if the angle sensor reaches a first set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the operation of the multi-way valve.

6. The active protection device for the stability of a cross-country forklift as claimed in claim 4, wherein the lifting cylinder pressure sensor detects that the mast is in a contracted state, and when the position sensor detects that the mast is in a backward inclined state, if the angle sensor reaches a second set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the operation of the multi-way valve.

7. The active protection device for the stability of a cross-country forklift as claimed in claim 4, wherein when the lifting cylinder pressure sensor detects that the mast is lifted and the position sensor detects that the mast is in a backward tilting state, if the angle sensor reaches a third set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets a instability condition, and the control system gives an alarm and limits the operation of the multi-way valve.

8. The active protection device for the stability of a cross-country forklift as claimed in claim 4, wherein when the lifting cylinder pressure sensor detects that the mast is in a contracted state and the position sensor detects that the mast is in a backward inclined state, if the angle sensor reaches a fourth set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets a instability condition, and the control system gives an alarm and limits the operation of the multi-way valve.

9. Off-road forklift truck characterized in that it comprises an active protection device for the stability of an off-road forklift truck according to any one of claims 1 to 8.

Technical Field

The invention belongs to the technical field of forklifts, and particularly relates to an active protection device for the stability of a cross-country forklift and the cross-country forklift with the same.

Background

The forklift is an industrial transportation vehicle, plays an important role in a logistics system of an enterprise, is widely applied to ports, stations, airports, goods yards, factories, warehouses, circulation centers, distribution centers and the like, can carry out loading, unloading and transportation operation of tray goods in cabins, carriages and containers, and is a main force army in material transportation equipment.

Although a special vehicle such as a cross-country diesel fork lift truck belongs to a small product in the industry, in combination with the number of overseas exports in recent years, for example, the customs report data (1-9 months) in 2019 are counted, the cross-country diesel fork lift truck has 93 exports in the whole country, wherein the first total export of American ranks is 30 exports, 9 four-wheel drive products have a single value of 13.8-15 ten thousand, 21 double-wheel drive products have a single value of 9.4-10.2 ten thousand, the second total export of Shandong Europe has a second export of 21 exports, and the single value is 7.86-12.66 ten thousand. The export data shows that the total export amount of the off-road vehicle products is increased every year. Moreover, the operation environment of the cross-country forklift is relatively complex and is mostly muddy or uneven ground, so that the warning and limiting function protection measures for the instability of the cross-country forklift are feasible.

Although current fork truck stability protection device can effectual monitoring fork truck stability state, the structure is comparatively complicated, and loads many sensor on the automobile body, and it is more easily to produce the fault point. And can only send out corresponding warning, can not play the effect of restriction function promptly active protection.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an active protection device for the stability of a cross-country forklift, and aims to realize active protection and improve safety.

In order to achieve the purpose, the invention adopts the technical scheme that: the active protection device for the stability of the cross-country forklift comprises an angle sensor, a position sensor, a multi-way valve and a control system, wherein the angle sensor is arranged on a forklift body and used for collecting angle data of the forklift body, the position sensor is arranged on a portal and used for detecting the state of the portal, the control system is used for receiving signals sent by the angle sensor and the position sensor, processing the signals and judging whether the processing result meets the instability condition; and when the processing result meets the instability condition, the control system gives an alarm and limits the operation of the multi-way valve.

The angle sensor is installed on the forklift body through a bolt.

The angle sensor is a biaxial inclination sensor.

The active protection device for the stability of the cross-country forklift further comprises a lifting oil cylinder pressure sensor for detecting the pressure of a lifting oil cylinder, and the lifting oil cylinder pressure sensor is electrically connected with the control system.

When the pressure sensor of the lifting oil cylinder detects that the portal frame is lifted, and the position sensor detects that the portal frame is in a horizontal state, if the angle sensor reaches a first set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the operation of the multi-way valve.

The pressure sensor of the lifting oil cylinder detects that the portal is in a contraction state, and when the position sensor detects that the portal is in a retroversion state, if the angle sensor reaches a second set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the operation of the multi-way valve.

When the pressure sensor of the lifting oil cylinder detects that the portal frame is lifted, and the position sensor detects that the portal frame is in a backward tilting state, if the angle sensor reaches a third set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the operation of the multi-way valve.

When the pressure sensor of the lifting oil cylinder detects that the portal is in a contraction state, and the position sensor detects that the portal is in a retroversion state, if the angle sensor reaches a fourth set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the multi-way valve to work.

The invention also provides the cross-country forklift comprising the active protection device for the stability of the cross-country forklift.

The active protection device for the stability of the cross-country forklift can effectively monitor the transverse and longitudinal stability of the cross-country forklift in real time, can feed back information to be output to the cross-country forklift, sends corresponding warning and takes protection measures to prevent the cross-country forklift from continuing to work in the whole forklift in a destabilization state, and plays a role in active safety protection of the stability. The invention also discloses a cross-country forklift.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic view of an angle sensor mounting location;

FIG. 2 is a schematic view of an angle sensor measurement;

FIG. 3 is a schematic diagram of a multiplex valve;

FIG. 4 is an external view of the multi-way valve;

FIG. 5 is a cross-sectional view of the multiplex valve;

FIG. 6 is a schematic view of a forklift in a longitudinally stacked condition;

FIG. 7 is a schematic view of the longitudinal operation of the forklift;

FIG. 8 is a schematic view of a forklift in a laterally stacked condition;

fig. 9 is a lateral operation state diagram of the forklift in the lateral operation state of the forklift.

Labeled as: 1. an angle sensor; 2. an oil return electromagnetic valve; 3. a descending solenoid valve; 4. an oil inlet valve plate; 5. a working valve plate; 6. a working valve plate; 7. a working valve plate; 8. an oil return valve plate; 9. a lift valve body; 10. a one-way valve; 11. an oil inlet channel; 12. the A2 oil passage; 13. an electromagnetic valve; 14. a manual unloading valve core; 15. a valve stem; 16. an oil return passage; 17. the a1 oil passage.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 to 4, the present invention provides an active protection device for the stability of a cross-country forklift, which comprises an angle sensor, a position sensor, a multi-way valve and a control system. The angle sensor is arranged on the forklift body and used for collecting angle data of the forklift body. The position sensor is arranged on the door frame and used for detecting the state of the door frame. The control system is used for receiving signals sent by the angle sensor and the position sensor, processing the signals and judging whether a processing result meets an instability condition; and when the processing result meets the instability condition, the control system gives an alarm and limits the operation of the multi-way valve.

Specifically, as shown in fig. 1 and 2, the angle sensor is installed on the forklift body through bolts, and the angle sensor is fixed inside the forklift body through 4 bolts, so that the installation and the disassembly are convenient, the occupied space is small, the operation is simple, and the safety is high. The angle sensor is a double-shaft inclination sensor, and the specific working principle of capturing angle data by adopting the double-shaft inclination sensor is as follows:

1) when the inclination angle of the angle sensor is smaller than the set alarm angle, the green light is on, the red light is off, and the signal line output is in a high-resistance state;

2) when the inclination angle of the angle sensor is larger than or equal to the alarm angle, the red light is turned on, the green light is turned off after two seconds of delay, the corresponding switch is turned on, when the device returns from the alarm angle, the red light is turned off, the green light is turned on after two seconds of delay, the corresponding switch is turned off, and the signal line output is in a high-resistance state. If the tilt state changes during the delay, the corresponding output signal does not change;

3) the resistance value of the angle sensor can be changed along with the angle to set the gear, so that the signal output of the gear with different resistance values at different angles is realized.

And (4) conclusion: through to the change of angle sensor self resistance value, gather corresponding angle signal and transmission output, adopt two solenoid valve locking mechanism model multiple unit valves in the aspect of the executive component selection, carry out corresponding control to the oil circuit through opening and shutting of solenoid valve promptly, play and carry out limit function's effect to the multiple unit valve.

As shown in fig. 3 and 4, the multiway valve mainly comprises an oil inlet valve plate, an oil return valve plate and three working valve plates 5, 6 and 7, wherein the working valve plates comprise a lifting valve plate, an inclined valve plate and an accessory valve plate. The multiple unit valve is provided with 2 solenoid valves. As shown in fig. 5, when the lift valve rod of the multi-way valve is at the descending position of the lift cylinder, the electromagnet is energized, the pilot oil flows from the a2 oil passage to the oil return passage, the check valve controlled by the electromagnetic valve is opened, and the oil of the lift cylinder flows to the oil return passage through the a1 oil passage, so that the control of the lift cylinder is realized, and the descending of the mast of the forklift can be controlled. Therefore, when the electromagnetic valve is not electrified, the gantry of the forklift is in a locked state and cannot descend, and the linkage of the electric signal and the multi-way valve is realized.

The active protection device for the stability of the cross-country forklift further comprises a lifting oil cylinder pressure sensor for detecting the pressure of a lifting oil cylinder, wherein an angle sensor, a position sensor, a multi-way valve and the lifting oil cylinder pressure sensor are electrically connected with a control system, and the multi-way valve is controlled by the control system. The control system is electrically connected with an alarm device, the alarm device is used for giving out voice alarm, and the alarm device is controlled by the control system.

In the operation process of the forklift, angle data of a forklift body are collected in real time through an angle sensor, the angle of the forklift body refers to the included angle between the forklift body and the horizontal ground, pressure data of a lifting oil cylinder are collected in real time through a pressure sensor of the lifting oil cylinder, state data of the gantry are collected through a position sensor, and the collected data are transmitted to a control system through the angle sensor, the position sensor and the pressure sensor of the lifting oil cylinder. The control system processes the received data so as to judge the stability of the forklift in real time, and when the real-time monitoring data of the forklift meet at least one of the following instability conditions, an alarm is given and the multi-way valve is limited to work:

1. as shown in fig. 6, when the pressure sensor of the lifting cylinder detects that the gantry is lifted and the position sensor detects that the gantry is in a horizontal state, if the angle sensor (when the output resistance value reaches the set X-axis value) reaches a first set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the multi-way valve to work. The first set angle is the maximum value of the longitudinal stacking angle of the forklift.

2. As shown in fig. 7, when the pressure sensor of the lifting cylinder detects that the gantry is in a contracted state, and the position sensor detects that the gantry is in a backward inclined state, if the angle sensor (when the output resistance value reaches the maximum X-axis value) reaches a second set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the operation of the multi-way valve. The second set angle is the maximum value of the longitudinal stacking angle of the forklift. The second set angle is the maximum longitudinal operation angle of the forklift.

3. As shown in fig. 8, when the pressure sensor of the lifting cylinder detects that the gantry is lifted and the position sensor detects that the gantry is in a backward tilting state, if the angle sensor (when the output resistance value reaches the set Y-axis value) reaches a third set angle, the angle sensor sends a signal to the control system, the control system judges that the forklift meets the instability condition, and the control system gives an alarm and limits the operation of the multi-way valve. The third set angle is the maximum value of the transverse stacking angle of the forklift.

4. As shown in fig. 9, when the pressure sensor of the lift cylinder detects that the mast is in the retracted state and the position sensor detects that the mast is in the backward tilting state, if the angle sensor (when the output resistance value reaches the maximum Y-axis value) reaches the fourth set angle, the angle sensor sends a signal to the control system, the control system determines that the forklift meets the instability condition, and the control system sends an alarm and limits the operation of the multi-way valve. The fourth set angle is the maximum transverse operation angle of the forklift.

The active protection device for the stability of the cross-country forklift starts with the condition triggered by the instability state (transverse longitudinal tipping and transverse tipping) of the forklift, namely the angle data of a forklift body and the horizontal ground, judges the stability state by capturing angle information, a pressure sensor on a lifting oil cylinder, a position sensor on an outer gantry and the like, and transmits angle signals to an execution module of the cross-country forklift in the aspect of safety protection, so that voice alarm is triggered and the operation of a multi-way reversing valve of the forklift is controlled under the instability approaching condition, the continuous operation of the forklift is limited, and the aim of actively protecting a vehicle is further fulfilled.

The invention also provides a cross-country forklift comprising the active protection device for the stability of the cross-country forklift. The detailed structure of the active protection device for the stability of the forklift can be referred to fig. 1 to 9, and will not be described herein. Since the cross-country truck of the present invention includes the active cross-country truck stability protection device in the above-described embodiments, it has all the advantages of the above-described active cross-country truck stability protection device.

The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.