A picking vehicle safety protection system and control method

Abstract

The application discloses a kind of sorting car safety protection system and control method, it is related to high-altitude equipment field, including car body and the operating platform of installation in car body, guardrail mechanism and mechanical locking mechanism are installed on operating platform, mechanical locking mechanism includes upper ejector rod, connecting rod, locking rod and reset component, vertical upper ejector rod is installed in operating platform, the upper end of upper ejector rod is hinged to one end of connecting rod, the other end of connecting rod is hinged to the inner end of locking rod, reset component is connected to upper ejector rod, further include sensor for detecting operating platform state, controller controls vehicle walking according to the detection result of sensor.Mechanical locking mechanism can automatically lock, and according to operating platform state control vehicle walking, form double cooperation, avoid the risk caused by personnel misoperation, improve equipment safety.

Description

Technical Field

[0001] This invention relates to the field of high-altitude equipment, and in particular to a safety protection system and control method for a picking vehicle. Background Technology

[0002] In recent years, the rapid development of the warehousing and logistics industry has placed higher demands on the safety of electric warehousing vehicles. In particular, the safety requirements of high-altitude picking equipment, which frequently operates at height in narrow aisles, are especially prominent.

[0003] In existing technologies, when a vehicle is raised to a high position, the guardrail can be opened actively by the driver. This means that its safety protection is only a single line of defense, entirely dependent on the driver's subjective safety awareness. In actual operation, especially under long-term, high-intensity working conditions, drivers are highly susceptible to misoperation due to fatigue, negligence, or emergency situations, prematurely opening the guardrail before the vehicle is in an absolutely safe state, i.e., before the platform has descended to a safe height. Such misoperation can directly lead to serious consequences. The driver's body parts may be crushed by the moving vehicle structure, or the driver may fall several meters from a height due to the loss of guardrail protection, causing serious personal injury accidents. Therefore, existing guardrail protection solutions cannot provide sufficiently reliable safety guarantees.

[0004] Because its safety mechanism is singular, the safety of the system depends entirely on the driver's subjective behavior. In the complex environment of high-altitude operations, there is a certain probability of driver misoperation risk, and a single line of defense cannot effectively prevent such misoperation. The guardrail can be easily opened, ultimately directly causing serious accidents such as pinching or falling from a height.

[0005] Therefore, how to provide a safe and stable safety protection system for picking carts is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a safety protection system and control method for picking carts. The mechanical locking mechanism can automatically lock and control the vehicle's movement according to the operating platform status, forming a dual coordination to avoid the risks caused by human error and improve equipment safety.

[0007] To address the aforementioned technical problems, this invention provides a safety protection system for a picking vehicle, comprising a vehicle body and an operating platform installed on the vehicle body. The operating platform is equipped with a guardrail mechanism and a mechanical locking mechanism. The mechanical locking mechanism includes an upper push rod, a connecting rod, a locking rod, and a reset component. The vertical upper push rod is installed on the operating platform. The upper end of the upper push rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the inner end of the locking rod. The reset component is connected to the upper push rod. When the operating platform rises away from the vehicle body floor, the reset component drives the upper push rod downwards and moves the locking rod outwards, causing the outer end of the locking rod to contact and lock the locking structure of the guardrail mechanism. When the operating platform descends and approaches the vehicle body floor, it pushes the upper push rod upwards and moves the locking rod inwards, causing the outer end of the locking rod to separate and unlock the locking structure. The system also includes a sensor for detecting the status of the operating platform, and a controller controls the vehicle's movement based on the sensor's detection results.

[0008] Preferably, it includes two locking rods symmetrically arranged at both ends of the upper top rod, corresponding to the two guardrail mechanisms on both sides of the operating platform.

[0009] Preferably, the system includes a T-shaped plate fixedly installed on the operating platform, the upper push rod is located in front of the vertical plate of the T-shaped plate, and horizontally arranged guide tubes are respectively installed at both ends of the horizontal plate of the T-shaped plate, with the locking rod passing through the guide tubes.

[0010] Preferably, an upper fixing plate is provided on the upper top rod, a lower fixing plate is provided in front of the vertical plate, the reset component is a vertical tension spring, the upper end of the tension spring is connected to the upper fixing plate, and the lower end of the tension spring is connected to the lower fixing plate.

[0011] Preferably, the lower end of the upper push rod is connected to the upper end of the lower push rod via a length adjustment assembly, and the lower end of the lower push rod passes through a through hole on the bottom surface of the operating platform and contacts the vehicle body floor plate.

[0012] Preferably, the guardrail mechanism includes an upper guardrail assembly, a lower guardrail assembly, and a linkage component, and the locking structure is a blocking component disposed on the linkage component.

[0013] Preferably, the operating platform is equipped with a first sensor for detecting the position of the upper push rod.

[0014] Preferably, a second sensor for detecting the position of the operating platform is provided on the vehicle body floor.

[0015] Preferably, the device includes a controller and a human-machine interface multi-functional instrument. The controller includes an input acquisition unit that connects the first sensor and the second sensor. The first sensor is a lock detection proximity switch, and the second sensor is a gantry lifting detection proximity switch.

[0016] This invention provides a control method for a picking cart safety protection system, comprising the following steps: Acquire the status of the lock detection proximity switch and the gantry lifting detection proximity switch; Determine whether each proximity switch has been accidentally activated. If no accidental activation has occurred, control whether the vehicle is allowed to move based on the status of each proximity switch. If the detection result of the lock detection proximity switch is locked and the detection result of the gantry lifting detection proximity switch is raised, then the travel motor is allowed to travel; If the detection result of the lock detection proximity switch is unlocked and the detection result of the gantry lifting detection proximity switch is grounded, then the travel motor is allowed to travel; If the detection result of the lock detection proximity switch is locked and the detection result of the gantry lifting detection proximity switch is grounded, the travel motor will be prohibited from traveling and a fault icon will be displayed. If the detection result of the lock detection proximity switch is unlocked and the detection result of the gantry lifting detection proximity switch is raised, then the travel motor is prohibited from traveling and a fault icon is displayed.

[0017] This invention provides a safety protection system for a picking vehicle, including a vehicle body and an operating platform installed on the vehicle body. The operating platform is equipped with a guardrail mechanism and a mechanical locking mechanism. The mechanical locking mechanism includes an upper push rod, a connecting rod, a locking rod, and a reset component. The vertical upper push rod is installed on the operating platform. The upper end of the upper push rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the inner end of the locking rod. The reset component is connected to the upper push rod. When the operating platform rises away from the vehicle body floor, the reset component drives the upper push rod downwards and moves the locking rod outwards, causing the outer end of the locking rod to contact the locking structure of the guardrail mechanism. When the operating platform descends and approaches the vehicle body floor, it pushes the upper push rod upwards and moves the locking rod inwards, causing the outer end of the locking rod to separate and unlock the locking structure. The system also includes a sensor for detecting the status of the operating platform, and a controller controls the vehicle's movement based on the sensor's detection results.

[0018] The mechanical locking mechanism can automatically lock and control vehicle movement based on the operating platform status, forming a dual-layer coordination to avoid risks caused by human error and improve equipment safety. By introducing the first layer of protection based on vehicle status perception, the unlocking authority of the guardrail is forcibly linked to the vehicle's safety status, i.e., the platform's high degree of security, eliminating the preconditions for misoperation from the source. By introducing the second layer of protection through active system intervention, a redundant barrier is added to the guardrail opening process. Even if the first layer of protection faces extreme situations, such as mechanical locking failure, it can still provide final protection. The safety responsibility is transformed from relying entirely on the driver's subjective awareness to being forcibly guaranteed by system hardware and logic programs. The mechanical locking and logical confirmation work together, and the two are logically related, forming a complete, closed-loop safety chain. It can actively perceive the vehicle's status and intervene by utilizing the vehicle's original working principle.

[0019] The present invention also provides a control method for the above-mentioned picking cart safety protection system. Since the above-mentioned picking cart safety protection system has the above-mentioned technical effects, the above-mentioned control method should also have the same technical effects, and will not be described in detail here. Attached Figure Description

[0020] Figure 1 A schematic diagram of the mechanical locking mechanism in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 2 A schematic diagram of the entire vehicle in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 3 A schematic diagram of the guardrail mechanism in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 4 A schematic diagram illustrating the working process of the mechanical locking mechanism in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 5 A schematic diagram of the locking process in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 6 This is an electrical schematic diagram of a specific embodiment of the picking cart safety protection system provided by the present invention.

[0021] Among them, 1-vehicle body; 2-operating platform; 3-upper push rod; 4-connecting rod; 5-locking rod; 6-T-shaped plate; 7-guide tube; 8-upper fixed plate; 9-lower fixed plate; 10-tension spring; 11-length adjustment assembly; 12-lower push rod; 13-upper guardrail assembly; 14-lower guardrail assembly; 15-linkage component; 16-blocking component; 17-controller; 18-human-machine interaction multi-functional instrument; 19-input acquisition unit; 20-lock detection proximity switch; 21-gantry lifting detection proximity switch; 22-detection plate. Detailed Implementation

[0022] The core of this invention is to provide a safety protection system and control method for picking carts. The mechanical locking mechanism can automatically lock and control the vehicle's movement according to the operating platform status, forming a dual coordination to avoid risks caused by human error and improve equipment safety.

[0023] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of the mechanical locking mechanism in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 2 A schematic diagram of the entire vehicle in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 3 A schematic diagram of the guardrail mechanism in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 4 A schematic diagram illustrating the working process of the mechanical locking mechanism in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 5 A schematic diagram of the locking process in a specific embodiment of the picking cart safety protection system provided by the present invention; Figure 6 This is an electrical schematic diagram of a specific embodiment of the picking cart safety protection system provided by the present invention.

[0025] This invention provides a safety protection system for a picking cart, including a cart body 1 and an operating platform 2 installed on the cart body 1. The operating platform 2 is equipped with a guardrail mechanism and a mechanical locking mechanism. The mechanical locking mechanism includes an upper rod 3, a connecting rod 4, a locking rod 5, and a reset component. The vertical upper rod 3 is movably installed on the operating platform 2. The upper end of the upper rod 3 is hinged to one end of the connecting rod 4, and the other end of the connecting rod 4 is hinged to the inner end of the locking rod 5. The reset component is connected to the upper rod 3.

[0026] When the operating platform 2 rises away from the bottom plate of the vehicle body 1, the reset component drives the upper push rod 3 to move downwards. Under the action of the connecting rod 4, it drives the locking rod 5 to move outwards, causing the outer end of the locking rod 5 to extend outwards and contact the locking structure of the locking guardrail mechanism. When the operating platform 2 descends and approaches the bottom plate of the vehicle body 1, the bottom plate of the vehicle body 1 pushes the upper push rod 3 to move upwards, and through the connecting rod 4, it drives the locking rod 5 to move inwards, causing the outer end of the locking rod 5 to retract inwards and separate the unlocking locking structure. By moving the operating platform up and down, the locking and unlocking of the mechanical locking mechanism is achieved. An electronic locking mechanism is also included, comprising a controller 17 and sensors for detecting the state of the operating platform 2. The controller 17 controls the vehicle's movement based on the detection results of the sensors.

[0027] The guardrail mechanism includes an upper guardrail assembly 13, a lower guardrail assembly 14, and a linkage 15. The locking structure is a blocking member 16 installed on the linkage 15. When the guardrail mechanism needs to be opened, the operator lifts the upper guardrail assembly 13, causing the linkage 15 to move upwards, which in turn lifts the lower guardrail assembly 14. When the mechanical locking mechanism is locked, the locking rod 5 extends outwards. At this time, the blocking member 16 on the linkage 15 abuts against the outer end of the locking rod 5 and cannot move upwards. According to the working principle of the guardrail mechanism, its opening requires the linkage 15 to move upwards. Therefore, the lifting of the operating platform 2 will trigger the locking rod 5 to extend, thereby indirectly preventing the guardrail from opening through the blocking member 16, forming an interlocking safety mechanism.

[0028] The mechanical locking mechanism can automatically lock and control vehicle movement based on the status of the operating platform 2, forming a dual collaboration to avoid risks caused by human error and improve equipment safety. By introducing the first layer of protection based on vehicle status perception, the unlocking permission of the guardrail is forcibly associated with the safety status of the vehicle, i.e., the platform, eliminating the preconditions for misoperation from the source. By introducing the second layer of protection with active system intervention, a redundant barrier is added to the guardrail opening process. Even if the first layer of protection faces extreme situations, such as mechanical locking failure, it can still provide final protection. The safety responsibility is transformed from relying entirely on the driver's subjective awareness to being forcibly guaranteed by system hardware and logic programs. The mechanical locking and logical confirmation work together and are logically related to each other, forming a complete, closed-loop safety chain. The vehicle's original working principle can be used to actively perceive the vehicle status and intervene.

[0029] Specifically, guardrail mechanisms are provided on both sides of the operating platform 2, and two locking rods 5 are symmetrically provided at both ends of the top rod 3, corresponding to the two guardrail mechanisms on both sides of the operating platform 2 respectively.

[0030] To achieve stable installation of the mechanical locking mechanism, a T-shaped plate 6 is fixedly installed on the operating platform 2. The upper push rod 3 is located in front of the vertical plate of the T-shaped plate 6. Horizontally arranged guide tubes 7 are installed at both ends of the horizontal plate of the T-shaped plate 6. The locking rod 5 passes through the guide tubes 7 to guide and limit the horizontal movement of the locking rod 5.

[0031] Furthermore, an upper fixing plate 8 is provided on the upper push rod 3, a lower fixing plate 9 is provided in front of the vertical plate, and the reset component is a vertical tension spring 10. The upper end of the tension spring 10 is connected to the upper fixing plate 8, and the lower end of the tension spring 10 is connected to the lower fixing plate 9. The two tension springs 10 are provided on both sides of the upper push rod 3.

[0032] To achieve the locking length adjustment, the lower end of the upper push rod 3 is connected to the upper end of the lower push rod 12 through the length adjustment component 11, and the lower end of the lower push rod 12 passes through the through hole on the bottom surface of the operating platform 2 and contacts the bottom plate of the vehicle body 1.

[0033] Based on the picking cart safety protection system provided in the above specific embodiments, a first sensor for detecting the position of the upper top rod 3 is installed on the operating platform 2. A second sensor for detecting the position of the operating platform 2 is installed on the bottom plate of the vehicle body 1. The system includes a controller 17 and a human-machine interface multi-functional instrument 18. The controller 17 includes an input acquisition unit 19 connecting the first and second sensors. The first sensor is a lock detection proximity switch 20, and the second sensor is a gantry lifting detection proximity switch 21. Specifically, the lock detection proximity switch 20 is installed in front of the vertical plate of the T-shaped plate 6, and a detection plate 22 for triggering the lock detection proximity switch 20 is installed on the upper fixed plate 8. In the initial stage of structural movement, the lock detection proximity switch 20 can detect the presence of the detection plate 22 and trigger a signal; as the movement is completed, the detection plate 22 moves out of the detection range, causing the signal to disappear, thus forming a change in detection state from presence to absence. In the initial stage of operation, the operating platform 2 is located in the sensing area of ​​the gantry lifting detection proximity switch 21, triggering a valid signal; as the operating platform 2 is lifted, it leaves the sensing area of ​​the gantry lifting detection proximity switch 21, and the signal disappears. During this process, a state signal from present to absent is output.

[0034] This invention also provides a control method for a picking cart safety protection system, comprising the following steps: Acquire the status of lock detection proximity switch 20 and gantry lifting detection proximity switch 21; Determine whether each proximity switch has been accidentally activated. If no accidental activation has occurred, control whether the vehicle is allowed to move based on the status of each proximity switch. If the detection result of the lock detection proximity switch 20 is locked and the detection result of the gantry lifting detection proximity switch 21 is raised, then the travel motor is allowed to travel; If the detection result of the lock detection proximity switch 20 is unlocked and the detection result of the gantry lifting detection proximity switch 21 is grounded, then the travel motor is allowed to travel; If the detection result of the lock detection proximity switch 20 is locked and the detection result of the gantry lifting detection proximity switch 21 is grounded, the travel motor will be prohibited from traveling and a fault icon will be displayed. If the detection result of the lock detection proximity switch 20 is unlocked and the detection result of the gantry lifting detection proximity switch 21 is raised, then the travel motor will be prohibited from traveling and a fault icon will be displayed.

[0035] The specific work process is as follows: System power-on and initialization: After the system is powered on, the controller 17 and the input acquisition unit 19 complete self-test and initialization.

[0036] Status signal acquisition: Input acquisition unit 19 reads the original switching signals of lock detection proximity switch 20 and gantry lifting detection proximity switch 21 in real time.

[0037] Signal preprocessing and transmission: The input acquisition unit 19 converts the acquired status signal into a CAN bus data message and sends it to the controller 17 via the CAN bus.

[0038] Intelligent logic judgment and movement restriction: Controller 17 parses the status data of the lock and operating platform 2 from the CAN bus. To prevent misjudgment caused by signal jitter or momentary interference, controller 17 sets an independent status confirmation delay timer for each detected signal. Only when a signal maintains a stable state within a preset delay time, i.e., the level state is consistent before and after the delay, does controller 17 determine that the status input is valid. Controller 17 has a pre-stored movement restriction logic table, which defines whether vehicle movement is allowed under different combinations of lock status and operating platform 2 lifting status. Specifically, if the detection result of the lock detection proximity switch 20 is locked and the detection result of the gantry lifting detection proximity switch 21 is raised, the travel motor is allowed to travel; if the detection result of the lock detection proximity switch 20 is unlocked and the detection result of the gantry lifting detection proximity switch 21 is grounded, the travel motor is allowed to travel; if the detection result of the lock detection proximity switch 20 is locked and the detection result of the gantry lifting detection proximity switch 21 is grounded, the travel motor is prohibited from traveling and a fault icon is displayed; if the detection result of the lock detection proximity switch 20 is unlocked and the detection result of the gantry lifting detection proximity switch 21 is raised, the travel motor is prohibited from traveling and a fault icon is displayed.

[0039] When the system determines that walking is prohibited, the controller 17 will simultaneously send an alarm command to the human-machine interface multi-function instrument 18 via the CAN bus. After receiving the command, the human-machine interface multi-function instrument 18 will flash an lock failure icon on the screen to clearly indicate the current safety hazard to the operator.

[0040] The picking cart safety protection system and control method provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A safety protection system for a picking cart, characterized in that, The system includes a vehicle body (1) and an operating platform (2) mounted on the vehicle body (1). The operating platform (2) is equipped with a guardrail mechanism and a mechanical locking mechanism. The mechanical locking mechanism includes an upper push rod (3), a connecting rod (4), a locking rod (5), and a reset component. The vertical upper push rod (3) is mounted on the operating platform (2). The upper end of the upper push rod (3) is hinged to one end of the connecting rod (4), and the other end of the connecting rod (4) is hinged to the inner end of the locking rod (5). The reset component is connected to the upper push rod (3). When the operating platform (2) rises away from the bottom plate of the vehicle body (1), the... The reset component drives the upper push rod (3) to move downward and drives the locking rod (5) to move outward, so that the outer end of the locking rod (5) contacts and locks the locking structure of the guardrail mechanism. When the operating platform (2) descends and approaches the bottom plate of the vehicle body (1), it pushes the upper push rod (3) to move upward and drives the locking rod (5) to move inward, so that the outer end of the locking rod (5) separates and unlocks the locking structure. It also includes a sensor for detecting the position of the upper push rod (3) and the position of the operating platform (2). The controller (17) controls the vehicle to move according to the detection result of the sensor.

2. The picking cart safety protection system according to claim 1, characterized in that, It includes two locking rods (5) symmetrically arranged at both ends of the upper top rod (3), which correspond to the two guardrail mechanisms on both sides of the operating platform (2).

3. The picking cart safety protection system according to claim 2, characterized in that, The T-shaped plate (6) is fixedly installed on the operating platform (2). The upper rod (3) is located in front of the vertical plate of the T-shaped plate (6). Horizontally arranged guide tubes (7) are installed at both ends of the horizontal plate of the T-shaped plate (6). The locking rod (5) passes through the guide tubes (7).

4. The picking cart safety protection system according to claim 3, characterized in that, An upper fixing plate (8) is provided on the upper top rod (3), and a lower fixing plate (9) is provided in front of the vertical plate. The reset component is a vertical tension spring (10). The upper end of the tension spring (10) is connected to the upper fixing plate (8), and the lower end of the tension spring (10) is connected to the lower fixing plate (9).

5. The picking cart safety protection system according to claim 4, characterized in that, The lower end of the upper push rod (3) is connected to the upper end of the lower push rod (12) through the length adjustment component (11), and the lower end of the lower push rod (12) passes through the through hole on the bottom surface of the operating platform (2) and contacts the bottom plate of the vehicle body (1).

6. The picking cart safety protection system according to claim 5, characterized in that, The guardrail mechanism includes an upper guardrail assembly (13), a lower guardrail assembly (14), and a linkage (15), and the locking structure is a blocking member (16) disposed on the linkage (15).

7. The picking cart safety protection system according to any one of claims 1 to 6, characterized in that, The operating platform (2) is equipped with a first sensor for detecting the position of the upper push rod (3).

8. The picking cart safety protection system according to claim 7, characterized in that, A second sensor for detecting the position of the operating platform (2) is provided on the bottom plate of the vehicle body (1).

9. The picking cart safety protection system according to claim 8, characterized in that, It includes a controller (17) and a human-machine interaction multi-function instrument (18). The controller (17) includes an input acquisition unit (19) that connects the first sensor and the second sensor. The first sensor is a lock detection proximity switch (20), and the second sensor is a gantry lifting detection proximity switch (21).

10. A control method for a safety protection system of a picking cart, characterized in that, Including the following steps: Obtain the status of the lock detection proximity switch (20) and the gantry lifting detection proximity switch (21); Determine whether each proximity switch has been accidentally activated. If no accidental activation has occurred, control whether the vehicle is allowed to move based on the status of each proximity switch. If the detection result of the lock detection proximity switch (20) is locked and the detection result of the gantry lifting detection proximity switch (21) is raised, then the travel motor is allowed to travel; If the detection result of the lock detection proximity switch (20) is unlocked and the detection result of the gantry lifting detection proximity switch (21) is grounded, then the walking motor is allowed to walk; If the detection result of the lock detection proximity switch (20) is locked and the detection result of the gantry lifting detection proximity switch (21) is grounded, then the travel motor is prohibited from traveling and a fault icon is displayed. If the detection result of the lock detection proximity switch (20) is unlocked and the detection result of the gantry lifting detection proximity switch (21) is raised, then the travel motor is prohibited from traveling and a fault icon is displayed.

Images