A safety control system, method and apparatus for a mini skid steer loader

Abstract

The present application relates to the technical field of mechanical safety, and discloses a safety operation control system, method and equipment for a mini skid steer loader, which is composed of a safety lock, a rotating speed detector and a controller, each module is responsible for collecting safety lock signals, engine rotating speed data and the like, and sending the data to the controller, the controller is the core, and generates a control instruction according to the detection results: when the safety lock signal is released and the engine rotating speed is lower than a preset threshold, the pilot electromagnetic valve is opened; if the set hydraulic oil flow is higher than the threshold, the confluence electromagnetic valve is connected, and the boom is driven to move. The controller is the core control unit of the safety operation control, the detection results are collected, the whole vehicle hydraulic system is controlled according to the detection results, the safety hazards caused by misoperation, unfamiliarity with the equipment, equipment failure and the like are avoided, and the running safety of the mini skid steer loader is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical safety technology, specifically to a safety operation control system, method, and equipment for a mini skid steer loader. Background Technology

[0002] Mini skid steer loaders are characterized by their small overall size, ability to easily enter confined spaces, and the ability to change and attach different working devices. Their small size means that their working environment is mostly in confined spaces, and the requirements for safe operation are relatively high. Therefore, it is essential to add a safety operating system to mini skid steer loaders.

[0003] Traditional mini skid steer loaders do not have a dedicated safety control system, and their safe operation depends entirely on the driver. However, mini skid steer loaders are relatively complex to operate and require a high level of expertise from the driver. If the driver has not received sufficient training, is not skilled enough, or is not familiar enough with the vehicle, misoperation may occur during operation, resulting in personal injury or equipment damage. Summary of the Invention

[0004] In view of this, the present invention provides a safety operation control system, method and device for a mini skid steer loader to solve the problem of low safety of existing mini skid steer loaders.

[0005] In a first aspect, the present invention provides a safety operation and control system for a mini skid steer loader, the system comprising: a safety locking module, a speed detection module, a pilot solenoid valve, a flow command receiving module, a confluence solenoid valve, and a controller, wherein...

[0006] The safety lock module has its output terminal connected to the first input terminal of the controller, and is used to detect whether the safety lock signal is released and send the first detection result to the controller.

[0007] The speed detection module has its output connected to the second input of the controller. It is used to detect the engine speed and send the engine speed to the controller.

[0008] A pilot solenoid valve, whose input end is connected to the first output end of the controller, is used to receive a first control command and initiate pilot operation on the mini skid steer loader according to the first control command;

[0009] The flow command receiving module has its output end connected to the third input end of the controller. It is used to receive the set working flow rate of hydraulic oil and send the set working flow rate to the controller.

[0010] A confluence solenoid valve, the input end of which is connected to the second output end of the controller, is used to receive a second control command and act according to the second control command;

[0011] The controller is used to generate a first control command based on the first detection result and the engine speed, and to generate a second control command based on the set working flow rate.

[0012] When the first detection result is that the safety lock signal is released and the engine speed is less than the preset threshold, the pilot solenoid valve is opened to release the vehicle safety lock; when the set working flow is greater than the preset flow threshold, the confluence solenoid valve is turned on.

[0013] The safety operation control system for the mini skid steer loader provided by this invention adds a controller as the core control unit for safety operation control. It centrally collects the detection results of the personnel detection module, safety locking module, and speed detection module, and controls the hydraulic system of the whole vehicle according to the detection results. This avoids safety hazards caused by misoperation, unfamiliarity with the equipment, equipment failure, etc., and ensures that the boom of the mini skid steer loader moves within the specified conditions and safety range, thereby improving the operational safety of the mini skid steer loader.

[0014] In one optional implementation, the system further includes: a personnel detection module and an alarm, wherein,

[0015] The personnel detection module has its output connected to the fourth input of the controller, and is used to detect whether there are operators on the operating table and send the second detection result to the controller.

[0016] The alarm has its input terminal connected to the third output terminal of the controller, and issues an alarm according to the third control command of the controller;

[0017] When the operator leaves the control panel, the second detection result is that there is no operator on the control panel. Based on the release of the safety lock signal, the engine speed being less than the preset threshold, and the absence of an operator on the control panel, the controller generates a third control command and sends it to the alarm.

[0018] The safety operation control system for the mini skid steer loader provided by this invention automatically generates a third control command to trigger an alarm when the operator leaves the control panel and the second detection result confirms that no one is operating the loader. This promptly reminds relevant personnel that the loader is in an unattended state, avoiding loader standby, energy waste, or safety hazards due to personnel leaving the machine unattended.

[0019] In one optional implementation, the personnel detection module includes: a personnel detection sensor and a proximity switch, wherein,

[0020] The personnel detection sensor has its output end connected to the input end of the proximity switch. It is used to collect the identity information of the personnel on the operating table and determine whether the personnel on the operating table are authorized operators based on the identity information. If so, it generates an identity confirmation command and sends it to the proximity switch.

[0021] The proximity switch, whose output is connected to the fourth input of the controller, is used to close according to the identity verification command, generate a second detection result and send it to the controller.

[0022] The safety operation control system for the mini skid steer loader provided by this invention collects personnel identity information and verifies authorization through sensors, ensuring that only compliant personnel operate the equipment. This eliminates safety hazards and misoperation risks caused by unauthorized operation from the source. After identity confirmation, the proximity switch is triggered to close and the detection result is sent to the controller, realizing the automated connection between identity verification and equipment control, and improving the convenience and efficiency of the operation process.

[0023] In one optional implementation, the safety locking module includes: a safety locking switch and a latching relay, wherein,

[0024] A safety lock switch, whose first output terminal is connected to the input terminal of a latching relay, is used to generate a safety lock signal or a safety release signal and send it to the latching relay;

[0025] A latching relay, whose output is connected to the input of a safety lock switch, is used to generate a latch release signal based on a safety release signal and send it to the safety lock switch.

[0026] When both the latch release signal and the safety release signal are present, the first detection result is that the safety lock signal is released.

[0027] The safety operation control system for the mini skid steer loader provided by this invention forms a "double confirmation" mechanism through bidirectional signal interaction between the safety lock switch and the latching relay. The lock is only released when both the safety release signal and the latching release signal are present simultaneously, effectively avoiding the safety risks caused by a single signal mis-triggering and improving the system's ability to prevent misoperation. The feedback design of the latching relay can maintain the stability of the locked state and prevent accidental release of the lock due to signal interruption or abnormal fluctuations, thereby enhancing the system's reliability.

[0028] In one optional implementation, the system further includes: an emergency switch, a handle button, an emergency relay, and an emergency solenoid valve, wherein,

[0029] An emergency switch has its first output terminal connected to the first input terminal of an emergency relay and its second output terminal connected to the first input terminal of an emergency solenoid valve, used to generate an emergency signal.

[0030] The handle button has its first output terminal connected to the second input terminal of the emergency relay to generate a handle signal.

[0031] An emergency relay, whose output terminal is connected to the second input terminal of an emergency solenoid valve, is used to receive emergency signals and handle signals, and generate relay signals based on the emergency signals and handle signals.

[0032] An emergency solenoid valve, whose output end is connected to the boom control end of the mini skid steer loader, is used to control the oil circuit opening and closing according to emergency signals and relay signals;

[0033] When the controller fails to generate the first control command or the pilot solenoid valve fails to operate, an emergency signal is generated simultaneously using the emergency switch and a handle signal is generated using the handle button. The emergency solenoid valve is then used to drive the boom of the mini skid steer loader to move the boom to a preset safe position.

[0034] The safety operation and control system for the mini skid steer loader provided by this invention features an emergency switch and handle button, along with an emergency relay and solenoid valve, forming an independent backup control path when the controller or pilot solenoid valve malfunctions and cannot control the boom normally. This allows for rapid response and drives the boom to a preset safe position, preventing safety accidents caused by equipment malfunction. The redundant design with multiple components ensures double confirmation and reliable transmission of emergency signals, reducing the risk of single component failure. Simultaneously, the emergency operation process is simple and efficient, allowing for rapid intervention in the event of a sudden malfunction, ensuring equipment and personnel safety, improving the safety and reliability of the equipment under abnormal operating conditions, and reducing losses caused by malfunctions.

[0035] In a second aspect, the present invention provides a safety operation and control method for a mini skid steer loader, the method being applied to the safety operation and control system of the mini skid steer loader according to any one of the first aspects, the method comprising:

[0036] Obtain the first detection result, which indicates whether the security lock signal has been released.

[0037] If the first detection result indicates that the safety lock signal has been released, then the engine speed is obtained;

[0038] When the engine speed is lower than the preset threshold, the pilot solenoid valve is opened to release the vehicle safety lock.

[0039] The safety operation and control method for mini skid steer loaders provided by this invention forms a dual condition constraint by simultaneously monitoring the operator's status and safety lock signal. The engine speed is only further determined after the operator is in position and the safety lock is released, effectively avoiding the risks of unauthorized operation and accidental start. When the engine speed is lower than a preset threshold, the pilot solenoid valve is automatically opened, which can prevent the hydraulic system from being started at high engine speed and causing impact damage to the loader, and can also achieve safe start at low speed, reduce energy consumption and mechanical wear, and improve the loader's operational stability and safety.

[0040] In one alternative implementation, the method further includes:

[0041] Obtain the second detection result, which indicates whether there are operators on the operating table;

[0042] An alarm will be issued when the second detection result indicates that there are no operators on the control panel and the vehicle safety lock is released.

[0043] The set working flow rate of the hydraulic oil is obtained, and the confluence solenoid valve is controlled according to the set working flow rate. If the set working flow rate is greater than the preset flow rate threshold, the confluence solenoid valve is controlled to be turned on.

[0044] In one alternative implementation, the method further includes:

[0045] If the pilot solenoid valve fails to open, an emergency signal and a handle signal are obtained.

[0046] When both an emergency signal and a handle signal are received simultaneously, the emergency solenoid valve is controlled to move the boom of the mini skid steer loader to a preset safe position.

[0047] The safety operation and control method for a mini skid steer loader provided by this invention intelligently controls the confluence solenoid valve based on the hydraulic oil's set working flow rate. This automatically opens the confluence valve when the flow demand is high, improving the efficiency of the hydraulic system, reducing energy consumption, and ensuring efficient equipment operation. Addressing the common anomaly of pilot solenoid valve failure, an emergency response mechanism is constructed. Through dual confirmation of emergency signals and handle signals, the emergency solenoid valve is driven to return the boom to a safe position, preventing accidents caused by equipment malfunction and enhancing the system's fault tolerance and reliability.

[0048] Thirdly, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method described in the second aspect or any corresponding embodiment thereof.

[0049] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform the method described in the second aspect or any of its corresponding embodiments. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the safety operation and control system of a mini skid steer loader according to an embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the safety operation and control system of another mini skid steer loader according to an embodiment of the present invention;

[0053] Figure 3 This is a schematic diagram of the safety operation and control system of another mini skid steer loader according to an embodiment of the present invention;

[0054] Figure 4 This is a flowchart illustrating the safe operation and control method for a mini skid steer loader according to an embodiment of the present invention;

[0055] Figure 5 This is a flowchart illustrating another safe operation and control method for a mini skid steer loader according to an embodiment of the present invention;

[0056] Figure 6 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Existing mini skid steer loaders have low safety. When the operator starts the equipment, the entire vehicle can move. Due to the operating characteristics of mini skid steer loaders, personnel are very likely to make mistakes and cause danger. Most mini skid steer loaders use throttle cables for throttle control. If the operator does not reset the throttle cable after the last operation and starts the vehicle again, it is easy to cause danger if the throttle is opened at high speed without safety control. When the vehicle malfunctions, the working device cannot be returned to a safe position.

[0059] To address the aforementioned issues, this invention provides a safety control system and method for a mini skid steer loader. By adding a vehicle control unit (VECU) as the core control unit, it centrally collects signals from engine speed, proximity switches, and safety lock switches. After judging the signals, it outputs commands to control the vehicle's hydraulic system, thereby improving the operational safety of the mini skid steer loader.

[0060] According to embodiments of the present invention, a safety operation and control system for a mini skid steer loader is provided, such as... Figure 1 As shown, the system includes: a safety locking module 1, a speed detection module 2, a pilot solenoid valve 3, a flow command receiving module 4, a confluence solenoid valve 5, and a controller 6.

[0061] like Figure 1 As shown, the safety locking module 1 has its output terminal connected to the first input terminal of the controller 6. It is used to detect whether the safety locking signal is released and to send the first detection result to the controller 6.

[0062] Specifically, the safety locking module 1 can be a separate button or a switch integrated into the rocker switch assembly or a button on the operation panel. When the mini skid steer loader is started, it is in a safety locked state. The safety lock needs to be released by the button of the safety locking module 1, and the first detection result of the safety lock signal is sent to the controller 6. Only when the first detection result is that the safety lock signal is released can the pilot operation of the mini skid steer loader be allowed.

[0063] like Figure 1 As shown, the speed detection module 2 has its output terminal connected to the second input terminal of the controller 6, and is used to detect the engine speed and send the engine speed to the controller 6.

[0064] Specifically, since it is difficult to directly detect the engine speed, and the engine output is connected to a generator, this embodiment indirectly detects the engine speed by detecting the generator speed. Only when the engine speed is lower than a preset threshold is the mini skid steer loader allowed to be operated. This prevents the hydraulic system from being started at high engine speed, which could cause impact damage to the loader, thus achieving safe starting at low speed and reducing energy consumption and mechanical wear.

[0065] like Figure 1 As shown, the pilot solenoid valve 3 has its input end connected to the first output end of the controller 6, and is used to receive the first control command and start the pilot operation of the mini skid steer loader according to the first control command.

[0066] Specifically, the pilot solenoid valve 3 indirectly controls the opening and closing of the main valve through "pilot pressure." Its specific structure is a mature existing technology and will not be described in detail here. The controller 6 determines whether to generate a first control command based on the first detection result, the second detection result, and the engine speed detection result. The pilot solenoid valve 3 operates based on the first control command. After receiving the first control command, the pilot solenoid valve 3 opens, and the vehicle safety lock is completely released. At this time, the operator can perform pilot operations on the mini skid steer loader, including but not limited to: controlling the vehicle boom movement, vehicle movement, and operating attachments. When the second detection result indicates that there is an operator on the control panel, the first detection result indicates that the safety lock signal is released, and the engine speed is less than a preset threshold, the controller 6 generates the first control command; otherwise, the controller 6 cannot generate the first control command.

[0067] like Figure 1As shown, the flow command receiving module 4 has its output end connected to the third input end of the controller 6. It is used to receive the set working flow of hydraulic oil and send the set working flow to the controller 6.

[0068] Specifically, the flow command receiving module 4 can be an instrument electronic control unit (IECU). The operator inputs the set working flow of hydraulic oil using IECS and sends the set working flow to the controller 6. The controller 6 determines how many valves need to be opened by comparing the set working flow with the standard flow of a single valve. If the set working flow is greater than the standard flow of a single valve, the flow will still not meet the requirements of the set working flow when one valve is fully opened. In this case, at least two valves need to be opened. If the set working flow is not greater than the standard flow of a single valve, only one valve needs to be opened.

[0069] like Figure 1 As shown, the confluence solenoid valve 5 has its input end connected to the second output end of the controller 6, and is used to receive the second control command and act according to the second control command.

[0070] Specifically, the confluence solenoid valve 5 is a solenoid valve in the hydraulic system used to control the "convergence" or "diversion" of oil circuits. In this embodiment, the valve core position is switched by turning the solenoid coil on and off, thereby connecting or disconnecting the confluence oil circuits between hydraulic pumps and changing the working flow rate of the hydraulic oil. When the confluence oil circuits between hydraulic pumps are connected, the flow rates of multiple hydraulic pumps are combined.

[0071] The control of the confluence solenoid valve 5 is achieved through the second control command of the controller 6. This second control command is determined based on the set working flow rate. Specifically, when the set working flow rate is greater than the standard flow rate of a single valve, the controller 6 generates the second control command and sends it to the confluence solenoid valve 5. The confluence solenoid valve 5 then activates according to the second control command, merging the two oil circuits to ensure that the standard flow rate of the merged oil circuit meets the set working flow rate requirement, thus guaranteeing sufficient hydraulic oil to the hydraulic system. When the set working flow rate is not greater than the standard flow rate of a single valve, the controller 6 does not generate the second control command. In this case, the confluence solenoid valve 5 remains open, and oil circuit merging does not occur; a single oil circuit can supply sufficient hydraulic oil to the hydraulic system.

[0072] like Figure 1 As shown, controller 6 is used to generate a first control command based on the first detection result and engine speed, and to generate a second control command based on the set working flow rate.

[0073] When the first detection result is that the safety lock signal is released and the engine speed is less than the preset threshold, the pilot solenoid valve 3 is opened to release the vehicle safety lock; when the set working flow is greater than the preset flow threshold, the confluence solenoid valve 5 is turned on.

[0074] Specifically, controller 6 can be a vehicle electronic control unit (VECU). When the mini skid steer loader is powered on and started, it determines whether the safety lock signal is released by detecting the first detection result sent by the safety lock module 1. When the safety lock signal is released, it further determines whether the engine speed is lower than a preset threshold by detecting the generator speed. When the engine speed is lower than the preset threshold, controller 6 generates a first control command and sends it to pilot solenoid valve 3. Pilot solenoid valve 3 opens according to the first control command, at which point the vehicle safety lock is released. When controller 6 does not detect that the safety lock signal is released, there is no need to further detect the engine speed; when the engine speed is higher than the preset threshold, a prompt can be displayed through an instrument panel pop-up window. This is just an example and is not a limitation.

[0075] The preset flow threshold can be the standard flow rate of a single valve, that is, the maximum flow rate that can pass through a single valve when it is fully open. For the control of the working flow rate, when the set working flow rate received by the controller 6 is greater than the standard flow rate of a single valve, the controller 6 generates a second control command and sends it to the confluence solenoid valve 5 to control the confluence solenoid valve 5 to open; when the set working flow rate received by the controller 6 is not greater than the standard flow rate of a single valve, the controller 6 will not generate a second control command, and the confluence solenoid valve 5 remains in the open state.

[0076] The safety operation control system for the mini skid steer loader provided in this embodiment adds a controller 6 as the core control unit for safety operation control. It centrally collects the detection results from the personnel detection module 7, the safety locking module 1, and the speed detection module 2, and controls the vehicle's hydraulic system based on the detection results. This avoids safety hazards caused by misoperation, unfamiliarity with the equipment, or equipment failure, and ensures that the boom of the mini skid steer loader operates within the specified conditions and safety range, thereby improving the operational safety of the mini skid steer loader.

[0077] In some alternative implementations, such as Figure 2 As shown, the system also includes: a personnel detection module 7 and an alarm 8, wherein,

[0078] The personnel detection module 7 has its output terminal connected to the fourth input terminal of the controller 6. It is used to detect whether there are operators on the operating table and send the second detection result to the controller 6.

[0079] Specifically, after the mini skid steer loader is started, in order to avoid misoperation of the mini skid steer loader due to unfamiliarity with the equipment or improper operation by personnel, direct operation of the mini skid steer loader is not allowed. This embodiment adds a personnel detection module 7 to detect in real time whether there is an operator on the control panel. Only when there is an operator on the control panel is operation of the mini skid steer loader allowed. When the operator leaves the control panel, the second detection result is that there is no operator on the control panel. At this time, it is necessary to ensure that the mini skid steer loader is not allowed to be operated to avoid danger.

[0080] Alarm 8 has its input terminal connected to the third output terminal of controller 6, and issues an alarm according to the third control command of controller 6.

[0081] When the operator leaves the control panel, the second detection result is that there is no operator on the control panel. Based on the release of the safety lock signal, the engine speed being less than the preset threshold, and the absence of an operator on the control panel, the controller generates a third control command and sends it to the alarm.

[0082] Specifically, alarm 8 can be a sound alarm, a light alarm, or a combination of both. In the context of this embodiment, alarm 8 is an integrated sound and light alarm on the dashboard of a mini skid steer loader. When the operator leaves the control panel, the second detection result indicates no operator is present. The controller 6 generates a third control command based on the safety lock signal being released, the engine speed being below a preset threshold, and the absence of an operator on the control panel, and sends this command to alarm 8. The conditions for generating the third control command are that the vehicle safety lock is released and there is no operator on the control panel simultaneously. Upon receiving the third control command, alarm 8 emits an audible and visual alarm, prompting the operator to close the safety lock switch 101 to prevent accidental operation. When the operator notices the alarm sound, they can close the safety lock switch 101. Once the safety lock switch is closed, a safety lock signal is generated, and the alarm stops.

[0083] The safety operation control system for the mini skid steer loader provided in this embodiment automatically generates a third control command to trigger the alarm 8 when the operator leaves the control panel and the second detection result confirms that no one is operating the loader. This promptly reminds relevant personnel that the loader is in an unattended state, avoiding loader standby, energy waste, or safety hazards due to personnel leaving the machine unattended.

[0084] In some alternative implementations, such as Figure 2 As shown, the personnel detection module 7 includes: a personnel detection sensor 701 and a proximity switch 702.

[0085] The personnel detection sensor 701 has its output terminal connected to the input terminal of the proximity switch 702. It is used to collect the identity information of the personnel on the operating table and determine whether the personnel on the operating table are authorized operators based on the identity information. If so, it generates an identity confirmation command and sends it to the proximity switch 702.

[0086] Specifically, the personnel detection sensor 701 serves two purposes: firstly, it needs to confirm that there is someone on the control panel; secondly, it needs to ensure that the person on the control panel is an authorized operator who is qualified to operate the mini skid steer loader.

[0087] Biometric identification or radio frequency identification (RFID) technology can be used to collect the identity information of personnel on the operating platform, achieving accurate identity verification. Taking common biometric sensors as an example, fingerprint recognition modules or facial recognition cameras can collect biometric information such as fingerprint patterns and facial features of personnel, and compare it with the pre-stored authorized personnel database in the system. For example, on the operating platform of a mini skid steer loader, a high-precision facial recognition sensor is installed. When the operator approaches, the sensor quickly captures their facial features and matches them one by one with the information of authorized personnel in the database. If the match is successful, the person is confirmed to be an authorized operator, and the sensor generates an identity confirmation command, which is sent to the subsequent proximity switch 702 in the form of an electrical signal; if the match fails, no command is sent, and an alarm system can be set to trigger an alarm system to indicate that an unauthorized person is approaching.

[0088] The proximity switch 702 has its output terminal connected to the fourth input terminal of the controller 6. It is used to close according to the identity verification command and generate a second detection result to send to the controller 6.

[0089] Specifically, after receiving the identity verification command, the proximity switch 702 automatically closes and generates a second detection result, which is then sent to the controller 6.

[0090] Specifically, the proximity switch can be a magnetic induction switch that outputs a signal when there is iron in the sensing area. It is usually located in front of the pedal where a person stands. When a person stands on it, the pedal sinks and moves forward due to gravity, and the proximity switch can detect the pedal. The proximity switch closes and generates a second detection result indicating that there is a person on the operating table.

[0091] The safety operation control system for the mini skid steer loader provided in this embodiment collects personnel identity information and verifies authorization through sensors, ensuring that only compliant personnel operate the equipment. This eliminates safety hazards and misoperation risks caused by unauthorized operations from the source. After identity confirmation, the proximity switch 702 is triggered to close and the detection result is sent to the controller 6, realizing the automated connection between identity verification and equipment control, and improving the convenience and efficiency of the operation process.

[0092] In some alternative implementations, such as Figure 2 As shown, the safety locking module 1 includes: a safety locking switch 101 and a latching relay 102.

[0093] The safety lock switch 101 has its first output terminal connected to the input terminal of the latching relay 102, and is used to generate a safety lock signal or a safety release signal and send it to the latching relay 102.

[0094] The latching relay 102 has its output terminal connected to the input terminal of the safety lock switch 101, and is used to generate a latch release signal based on the safety release signal and send it to the safety lock switch 101.

[0095] When both the latch release signal and the safety release signal are present, the first detection result is that the safety lock signal is released.

[0096] Specifically, the safety lock switch 101 can be a two-way button, such as a rocker switch, for example only, but not limited to this. When the mini skid steer loader needs maintenance or is not in operation, the operator switches the safety lock switch 101 to the locked mode. At this time, the internal circuit structure of the switch changes, generating a safety lock signal, which is sent to the latching relay 102 as an electrical signal through the first output terminal, ensuring that the equipment cannot be started before the lock is released. After the mini skid steer loader is powered on and started, before the equipment is running normally, the safety lock switch 101 should be in the locked mode. After verifying the safety conditions on site, the operator switches the safety lock switch 101 to the unlocked mode. At this time, the safety lock switch 101 generates a safety release signal and sends it to the latching relay 102, indicating that the equipment is ready for operation.

[0097] The latching relay 102 achieves precise control of the device's locked state through interaction with the safety lock switch 101. When the latching relay 102 receives a safety release signal from the safety lock switch 101, its internal circuit is activated. After logic processing, it generates a latch release signal and feeds it back to the input of the safety lock switch 101. Only when the safety lock switch 101 simultaneously receives its own safety release signal and the latch release signal fed back by the latching relay 102 is it determined that the safety lock signal has been released. At this time, the first detection result is that the safety lock signal has been released, avoiding false locking caused by a single signal failure and ensuring that the device operates in a truly safe state.

[0098] It should be noted that if the mini skid steer loader is powered on and before normal operation, and the safety lock switch 101 is in unlocked mode, it needs to be turned off and then on again for it to generate a safety release signal. Once the safety lock signal is released, the entire mini skid steer loader is released from safety lock. At this time, the controller 6 detects the signal from the proximity switch 702 to determine if the operator is in the correct position on the control panel. If the controller 6 does not detect the second detection result from the proximity switch 702, it will issue an alarm through the alarm 8. If the entire vehicle is in a safety lock state, the signal from the proximity switch 702 does not need to be detected.

[0099] The safety operation control system of the mini skid steer loader provided in this embodiment forms a "double confirmation" mechanism through bidirectional signal interaction between the safety lock switch 101 and the latching relay 102. The lock is only released when both the safety release signal and the latch release signal are present, which effectively avoids the safety risks caused by a single signal mis-triggering and improves the system's ability to prevent misoperation. The feedback design of the latching relay 102 can maintain the stability of the locked state and prevent the lock from being accidentally released due to signal interruption or abnormal fluctuations, thereby enhancing the system's reliability.

[0100] In some alternative implementations, such as Figure 3 As shown, the system also includes: emergency switch 9, handle button 10, emergency relay 11, and emergency solenoid valve 12.

[0101] Emergency switch 9 has its first output terminal connected to the first input terminal of emergency relay 11 and its second output terminal connected to the first input terminal of emergency solenoid valve 12, and is used to generate an emergency signal.

[0102] Specifically, the emergency switch 9 is the core triggering device for emergency operation of the mini skid steer loader. It is typically a prominent red mushroom-shaped button, installed on the control panel for easy and quick operation. When the controller 6 malfunctions and fails to generate the first control command, or when the pilot solenoid valve 3 fails to operate normally due to mechanical jamming, circuit damage, or other reasons, the operator can immediately press the emergency switch 9. Upon pressing, the internal contacts of the emergency switch 9 close, and its first and second output terminals simultaneously output emergency signals. These signals are transmitted separately in the form of electrical signals: the first output terminal sends the signal to the first input terminal of the emergency relay 11 as a trigger signal for the relay's operation; the second output terminal directly transmits the signal to the first input terminal of the emergency solenoid valve 12, providing initial power for the solenoid valve's operation.

[0103] The handle button 10 has its first output terminal connected to the second input terminal of the emergency relay 11 to generate a handle signal.

[0104] Specifically, the handle button 10 is used to generate an auxiliary signal during emergency operations. It is usually integrated into the loader's operating handle, allowing the operator to quickly trigger it while pressing the emergency switch 9. During normal operation, the handle button 10 is inactive. However, when entering emergency operation mode, the operator must simultaneously operate the handle button 10 after pressing the emergency switch 9. This activates the internal circuitry of the handle button 10, generating a handle signal at its first output terminal, which is then sent to the second input terminal of the emergency relay 11. The handle signal and the emergency signal generated by the emergency switch 9 together constitute a dual confirmation mechanism for emergency operations, ensuring that the execution of emergency actions is based on the operator's explicit intent. For example, when operating in a narrow passageway, if the pilot solenoid valve 3 malfunctions, preventing the boom from retracting, the operator, after pressing the emergency switch 9, can clearly transmit the instruction to "retract the boom to a safe position" to the system via the handle button 10, preventing accidents caused by misoperation.

[0105] The emergency relay 11 has its output terminal connected to the second input terminal of the emergency solenoid valve 12. It is used to receive emergency signals and handle signals, and generate relay signals based on the emergency signals and handle signals.

[0106] Specifically, when the first input terminal of the emergency relay 11 receives an emergency signal from the emergency switch 9, and the second input terminal receives a handle signal generated by the handle button 10, the internal electromagnetic coil is energized, generating an electromagnetic force that attracts the armature to actuate. After the armature actuates, the output terminal of the emergency relay 11 is turned on, generating a relay signal based on the emergency signal and the handle signal, and sending it to the second input terminal of the emergency solenoid valve 12. Compared to the initial emergency signal and handle signal, the relay signal has a stronger driving capability and can reliably drive the emergency solenoid valve 12 to actuate. For example, in a humid working environment, even if the emergency signal and handle signal are slightly attenuated due to moisture in the wiring, the emergency relay 11 can still amplify the signal to ensure that the emergency solenoid valve 12 receives a signal of sufficient strength, thereby ensuring the smooth execution of emergency operations.

[0107] Emergency solenoid valve 12, whose output end is connected to the boom control end of the mini skid steer loader, is used to control the oil circuit opening and closing according to emergency signals and relay signals.

[0108] When the controller 6 fails to generate the first control command or the pilot solenoid valve 3 fails to operate, an emergency signal is generated by the emergency switch 9 and a handle signal is generated by the handle button 10. The emergency solenoid valve 12 is used to drive the boom of the mini skid steer loader to move the boom to the preset safe position.

[0109] Specifically, the emergency solenoid valve 12 is the final actuator for the emergency actions of the mini skid steer loader, and its output is directly connected to the boom control end of the loader. When the first input of the emergency solenoid valve 12 receives an emergency signal from the emergency switch 9, and the second input receives a relay signal generated by the emergency relay 11, the internal electromagnetic coil generates a magnetic field, driving the valve core to move against the spring resistance and changing the flow direction of the hydraulic oil. Under normal operation, the boom is controlled by the pilot solenoid valve 3 to control the hydraulic circuit; however, in emergency mode, when the operator presses both the emergency switch and the handle button, the emergency solenoid valve 12 switches the oil circuit, causing the hydraulic oil to flow to the hydraulic cylinder of the boom along a preset path, which is equivalent to disconnecting the hydraulic system's oil circuit, relieving the pressure of the hydraulic system, and allowing the boom to slowly descend under gravity. For example, when the loader is operating on a slope, if the controller 6 suddenly fails, the emergency solenoid valve 12, after receiving both signals, will retract the boom and lower it to a preset safe position, preventing the loader from tipping over due to instability and ensuring the safety of the equipment and personnel.

[0110] The safety control system for the mini skid steer loader provided in this embodiment features an emergency switch 9 and handle button 10 working in conjunction with emergency relay 11 and solenoid valve to form an independent backup control path when the controller 6 or pilot solenoid valve 3 malfunctions and cannot control the boom normally. This allows for a rapid response and drives the boom to a preset safe position, preventing safety accidents caused by equipment malfunction. The redundant design with multiple components ensures double confirmation and reliable transmission of emergency signals, reducing the risk of single component failure. Simultaneously, the emergency operation process is simple and efficient, allowing for rapid intervention in case of sudden malfunctions, ensuring equipment and personnel safety, improving the safety and reliability of the equipment under abnormal operating conditions, and reducing losses caused by malfunctions.

[0111] According to this embodiment, a safe operation control method for a mini skid steer loader is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0112] This embodiment provides a safe operation and control method for a mini skid steer loader, which can be used in the computer system described above or the safe operation and control system for the mini skid steer loader in the previous embodiment. Details that have already been described will not be repeated here. Figure 4 This is a flowchart of the safe operation and control method for a mini skid steer loader according to this embodiment, such as... Figure 4 As shown, the process includes the following steps:

[0113] Step S101: Obtain the first detection result, which is whether the security lock signal has been released.

[0114] Step S102: When the first detection result is that the safety lock signal is released, the engine speed is obtained.

[0115] Step S103: When the engine speed is less than the preset threshold, control the pilot solenoid valve 3 to open and release the vehicle safety lock.

[0116] The safe operation and control method for the mini skid steer loader provided in this embodiment forms a dual condition constraint by simultaneously monitoring the operator's status and the safety lock signal. The engine speed is only further determined after the operator is in position and the safety lock is released, effectively avoiding the risk of unauthorized operation and accidental start. When the engine speed is lower than the preset threshold, the pilot solenoid valve 3 is automatically opened, which can prevent the hydraulic system from being started at high engine speed and causing impact damage to the loader, and can also achieve safe start at low speed, reduce energy consumption and mechanical wear, and improve the loader's operational stability and safety.

[0117] In some alternative implementations, such as Figure 5 As shown, the method also includes:

[0118] Step S104: Obtain the second detection result, which indicates whether there are operators on the operating table.

[0119] Step S105: When the second detection result indicates that there are no operators on the control panel and the vehicle safety lock is released, an alarm is issued.

[0120] Step S106: Obtain the set working flow rate of hydraulic oil, and control the confluence solenoid valve 5 according to the set working flow rate. If the set working flow rate is greater than the preset flow rate threshold, control the confluence solenoid valve 5 to be turned on.

[0121] In step S107, if the pilot solenoid valve 3 cannot be opened, an emergency signal and a handle signal are obtained.

[0122] Step S108: When both the emergency signal and the handle signal are received simultaneously, control the emergency solenoid valve 12 to drive the boom of the mini skid steer loader to move to the preset safe position.

[0123] The safety operation and control method for the mini skid steer loader provided in this embodiment intelligently controls the confluence solenoid valve based on the hydraulic oil's set working flow rate. It can automatically open the confluence when the flow demand is high, improving the efficiency of the hydraulic system, reducing energy consumption, and ensuring efficient operation of the equipment. In response to the common anomaly of pilot solenoid valve failure, an emergency response mechanism is constructed. Through dual confirmation of emergency signals and handle signals, the emergency solenoid valve is driven to return the boom to a safe position, avoiding accidents caused by equipment loss of control and enhancing the system's fault tolerance and reliability.

[0124] The further detailed description of each of the above steps is the same as that of the corresponding system embodiments described above, and will not be repeated here.

[0125] This invention also provides a computer device having the above-described features. Figure 1-3 Safety control system for any of the mini skid steer loaders shown.

[0126] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 6 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 6 Take a processor 10 as an example.

[0127] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0128] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0129] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0130] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0131] The computer device also includes a communication interface 30 for communicating with other devices or communication networks.

[0132] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0133] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A safety operation and control system for a mini skid steer loader, characterized in that, The system includes: a safety locking module, a speed detection module, a pilot solenoid valve, a flow command receiving module, a confluence solenoid valve, and a controller. A safety locking module, whose output is connected to the first input of the controller, is used to detect whether the safety locking signal is released and send the first detection result to the controller. The engine speed detection module has its output terminal connected to the second input terminal of the controller, and is used to detect the engine speed and send the engine speed to the controller. A pilot solenoid valve, whose input end is connected to the first output end of the controller, is used to receive a first control command and initiate pilot control of the mini skid steer loader according to the first control command. The flow command receiving module has its output end connected to the third input end of the controller, and is used to receive the set working flow rate of hydraulic oil and send the set working flow rate to the controller. A confluence solenoid valve, the input end of which is connected to the second output end of the controller, is used to receive a second control command and act according to the second control command; The controller is used to generate a first control command based on the first detection result and the engine speed, and to generate a second control command based on the set working flow rate. When the first detection result is that the safety lock signal is released and the engine speed is less than the preset threshold, the pilot solenoid valve is controlled to open to release the vehicle safety lock; when the set working flow rate is greater than the preset flow rate threshold, the confluence solenoid valve is controlled to turn on.

2. The system according to claim 1, characterized in that, The system also includes: a personnel detection module and an alarm, wherein, The personnel detection module has its output connected to the fourth input of the controller, and is used to detect whether there are operators on the operating table and send the second detection result to the controller. An alarm, the input of which is connected to the third output of the controller, issues an alarm according to the third control command of the controller; When the operator leaves the control panel, the second detection result is that there is no operator on the control panel. Based on the release of the safety lock signal, the engine speed being less than the preset threshold, and the absence of an operator on the control panel, the controller generates a third control command and sends it to the alarm.

3. The system according to claim 2, characterized in that, The personnel detection module includes: a personnel detection sensor and a proximity switch, wherein, A personnel detection sensor, whose output is connected to the input of the proximity switch, is used to collect the identity information of the personnel on the operating table, and to determine whether the personnel on the operating table are authorized operators based on the identity information. If so, an identity confirmation command is generated and sent to the proximity switch. A proximity switch, the output of which is connected to the fourth input of the controller, is used to close according to the identity verification command, generate a second detection result and send it to the controller.

4. The system according to claim 1, characterized in that, The safety locking module includes: a safety locking switch and a latching relay, wherein, A safety lock switch, the first output terminal of which is connected to the input terminal of the latching relay, is used to generate a safety lock signal or a safety release signal and send it to the latching relay; A latching relay, the output of which is connected to the input of the safety lock switch, is used to generate a latch release signal based on the safety release signal and send it to the safety lock switch; When both the latch release signal and the security release signal are present, the first detection result is that the security lock signal is released.

5. The system according to claim 1, characterized in that, The system also includes: an emergency switch, a handle button, an emergency relay, and an emergency solenoid valve, wherein, An emergency switch, whose first output terminal is connected to the first input terminal of the emergency relay and whose second output terminal is connected to the first input terminal of the emergency solenoid valve, is used to generate an emergency signal; The handle button has its first output terminal connected to the second input terminal of the emergency relay to generate a handle signal; An emergency relay, whose output terminal is connected to the second input terminal of the emergency solenoid valve, is used to receive the emergency signal and the handle signal, and generate a relay signal based on the emergency signal and the handle signal; An emergency solenoid valve, the output of which is connected to the boom control end of the mini skid steer loader, is used to control the oil circuit opening and closing according to the emergency signal and the relay signal; When the controller fails to generate the first control command or the pilot solenoid valve fails to operate, an emergency signal is generated by the emergency switch and a handle signal is generated by the handle button. The emergency solenoid valve is then used to drive the boom of the mini skid steer loader to move to a preset safe position.

6. A safe operation and control method for a mini skid steer loader, characterized in that, The method is applied to the safety operation control system of the mini skid steer loader according to any one of claims 1-5, and the method includes: Obtain the first detection result, which indicates whether the security lock signal has been released. If the first detection result indicates that the safety lock signal has been released, then the engine speed is obtained; When the engine speed is less than a preset threshold, the pilot solenoid valve is opened to release the vehicle safety lock.

7. The method according to claim 6, characterized in that, The method further includes: Obtain a second detection result, which indicates whether there are operators on the control panel. An alarm will be issued when the second detection result indicates that there are no operators on the control panel and the vehicle safety lock is released. The set working flow rate of the hydraulic oil is obtained, and the confluence solenoid valve is controlled according to the set working flow rate. If the set working flow rate is greater than the preset flow rate threshold, the confluence solenoid valve is controlled to be turned on.

8. The method according to claim 6, characterized in that, The method further includes: If the pilot solenoid valve fails to open, an emergency signal and a handle signal are acquired. When both the emergency signal and the handle signal are received simultaneously, the emergency solenoid valve is controlled to move the boom of the mini skid steer loader to a preset safe position.

9. A computer device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 6 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to perform the method of any one of claims 6 to 8.

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