Hydraulic system for automatic braking of AGV (Automatic Guided Vehicle) and AGV

Abstract

The utility model discloses a hydraulic system used for AGV automatic braking and an AGV, the AGV comprises the hydraulic system used for AGV automatic braking, the hydraulic system used for AGV automatic braking comprises a brake oil cylinder, the brake oil cylinder comprises a rod cavity and an elastic piece brake cavity communicated with the rod cavity, a piston rod is connected in the rod cavity in a sliding mode, and the elastic piece brake cavity is communicated with the rod cavity. An elastic piece is arranged in the elastic piece braking cavity, the piston rod is elastically connected with the elastic piece, and the braking oil cylinder is used for braking. The energy accumulator is used for storing energy; the control valve is connected with an oil inlet, an oil outlet and an oil return opening in series, the oil inlet is used for being connected with an oil supply device, an inlet of the brake oil cylinder is connected to the oil inlet, an inlet of the energy accumulator is connected to the oil outlet, and the control valve is used for achieving reversing adjustment of the oil inlet and the oil outlet; and the control device is electrically connected with the brake oil cylinder, the energy accumulator and the control valve. The utility model aims to improve the safety, improve the braking effect and reduce the production cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to AGV technical field, especially a kind of AGV automatic steering control device and AGV car. BACKGROUND

[0002] In prior art, AGV vehicle is currently widely used in various fields, as a kind of unmanned car capable of autonomous navigation, obstacle avoidance, realizes path planning, has become an important part of current China realizes industrial 4.0.For outdoor heavy load working condition, current existing AGV brake device structure is complex, strength is partial, cannot achieve double-layer protection, now double-drive motor is electromagnetic control brake or mechanical manual control brake (need manual operation) cannot realize automatic control. Consequently, brake device used by outdoor heavy load AGV is difficult to realize low cost and scheme reliable. SUMMARY

[0003] The utility model discloses a kind of hydraulic system and AGV car for AGV automatic braking, to improve safety, improve braking effect and reduce production cost.

[0004] To achieve the above object, the utility model provides a kind of hydraulic system for AGV automatic braking, comprising:

[0005] Brake cylinder, the brake cylinder includes rod cavity and the elastic piece brake cavity being communicated with the rod cavity, the piston rod is slidably connected in the rod cavity, the elastic piece brake cavity is provided with elastic piece, the piston rod is elastically connected with the elastic piece, the brake cylinder is used for brake braking;

[0006] Energy accumulator, for energy storage;

[0007] Control valve, the control valve is connected with oil inlet, oil outlet and oil return, the oil inlet is used to connect oil supply device, the inlet of the brake cylinder is connected to the oil inlet, the inlet of the energy accumulator is connected to the oil outlet, the control valve is used to realize the reversing adjustment of the oil inlet and the oil outlet;

[0008] Control device, the control device is respectively electrically connected with the brake cylinder, the energy accumulator and the control valve.

[0009] In an embodiment, the brake cylinder is normally closed brake cylinder, no hydraulic oil acts to make brake in locking state.

[0010] In an embodiment, the hydraulic system for AGV automatic braking further comprises a pipeline assembly, the pipeline assembly comprises a first pipeline and a second pipeline, the inlet of the brake cylinder is connected to the oil inlet through the first pipeline, and the inlet of the accumulator is connected to the oil outlet through the second pipeline.

[0011] In an embodiment, when the control valve is powered, the oil inlet and the oil outlet are opened, the control valve supplies oil to the brake cylinder and the accumulator, the piston rod moves, and the elastic member can be elastically deformed to release the locking state of the brake.

[0012] In an embodiment, when the control valve is powered off, the oil return port is opened, the hydraulic oil in the brake cylinder and the accumulator flows back, the piston rod retracts, and the elastic member resets to make the brake in the locking state.

[0013] In an embodiment, the hydraulic system for AGV automatic braking further comprises a first pressure detection device, the control device is electrically connected with the first pressure detection device, when the first pressure detection device detects that the pressure of the accumulator reaches the highest set value, the control device controls the accumulator to stop storing energy.

[0014] In an embodiment, the hydraulic system for AGV automatic braking further comprises a second pressure detection device, the control device is electrically connected with the second pressure detection device, when the second pressure detection device detects that the pressure of the accumulator reaches the lowest set value, the control device controls the accumulator and the brake cylinder to store energy.

[0015] In an embodiment, the first pressure detection device and the second pressure detection device are respectively connected to the control valve.

[0016] In an embodiment, the first pressure detection device and the second pressure detection device are both pressure sensors.

[0017] In an embodiment, the control valve is an electromagnetic control valve.

[0018] The utility model also relates to an AGV, the AGV includes above-mentioned for AGV automatic braking hydraulic system, for AGV automatic braking hydraulic system includes brake cylinder, brake cylinder includes the rod cavity and with the rod cavity communication elastic piece brake chamber, the rod cavity is slidably connected with piston rod in, the elastic piece brake chamber is provided with elastic piece, piston rod is with elastic piece elastic connection, brake cylinder is used for brake's brake, energy accumulator, for energy storage, control valve, control valve has oil inlet, oil outlet and oil return in series, the oil inlet is used for connecting oil supply device, the import of brake cylinder is connected to the oil inlet, the import of energy accumulator is connected to the oil outlet, control valve is used for realizing the reversing adjustment of oil inlet and oil outlet, control device, control device is electric connection with brake cylinder, energy accumulator and control valve respectively.

[0019] The utility model also proposes an AGV, adopt all technical schemes of above-mentioned all embodiments, thus also have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here do not repeat one by one.

[0020] The utility model discloses a kind of hydraulic systems for AGV (automatic guided vehicle) automatic braking, wherein, brake cylinder includes rod cavity and elastic piece brake chamber, and both are communicated by internal passage. Piston rod is slidably connected in rod cavity, and is elastically connected with elastic piece (usually spring) arranged in elastic piece brake chamber. When piston rod moves, it will compress or release elastic piece, so as to generate braking force. Energy accumulator is used to store hydraulic energy, to provide pressure quickly when needed, to ensure that even main oil supply system fails, emergency braking can be carried out. Control valve has oil inlet, oil outlet and oil return in series. Oil inlet is connected to oil supply device, the import of brake cylinder is connected to oil inlet, and the import of energy accumulator is connected to oil outlet. Control valve can realize reversing adjustment between oil inlet and oil outlet, control the flow direction of hydraulic oil, to perform different operation modes (such as release brake or activate brake). Control device is electrically connected with brake cylinder, energy accumulator and control valve respectively. According to preset condition or sensor feedback information, send instruction, control the working state of above-mentioned component, realize automatic braking process. The scheme controls braking process accurately through hydraulic system, and utilizes energy accumulator to ensure that even in the case of power supply or other main system failure, emergency braking can be carried out, utilizes the power of mechanical spring to realize brake, reduces the dependence on electronic or other possible error system, improves safety, improves brake effect and reduces production cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0022] Figure 1 The structural schematic diagram of an embodiment of the hydraulic system for AGV automatic braking provided by the present application is shown in the figure.

[0023] Figure 2 The structural schematic diagram of an embodiment of the hydraulic system for AGV automatic braking provided by the present application is shown in the figure. Figure 1 The sectional view schematic diagram.

[0024] Explanation of reference numerals:

[0025] 10, brake oil cylinder; 11, rod cavity; 111, piston rod; 12, elastic element brake cavity; 112, elastic element; 20, accumulator; 30, control valve; 31, oil inlet; 32, oil outlet; 33, oil return; 40, pipeline assembly; 41, first pipeline; 42, second pipeline; 50, first pressure detection device; 60, second pressure detection device.

[0026] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0030] The utility model provides a kind of hydraulic system and AGV car for AGV automatic braking.

[0031] With reference Figures 1-2 The utility model embodiment, a kind of hydraulic system for AGV automatic braking, comprising:

[0032] Brake cylinder 10, the brake cylinder 10 includes rod cavity 11 and the elastic member brake cavity 12 being communicated with the rod cavity 11, the piston rod 111 is slidably connected in the rod cavity 11, elastic member 112 is arranged in the elastic member brake cavity 12, the piston rod 111 is elastically connected with the elastic member 112, the brake cylinder 10 is used for brake braking;

[0033] Energy accumulator 20, for energy storage;

[0034] Control valve 30, the control valve 30 is in series with oil inlet 31, oil outlet 32 and oil return 33, the oil inlet 31 is used to connect oil supply device, the inlet of brake cylinder 10 is connected to the oil inlet 31, the inlet of energy accumulator 20 is connected to the oil outlet 32, the control valve 30 is used to realize the reversing adjustment of the oil inlet 31 and the oil outlet 33;

[0035] Control device, the control device is electrically connected with brake cylinder 10, energy accumulator 20 and control valve 30 respectively.

[0036] The utility model discloses a kind of hydraulic braking systems for AGV (automatic guided vehicle) automatic braking. This system is specially designed to realize the automatic brake function of AGV, ensure that vehicle can be safely and smoothly stopped when needing to stop. The hydraulic system for AGV automatic braking includes brake cylinder 10, which is the core component of braking system, contains two chambers-rod cavity 11 and elastic element brake cavity 12. Rod cavity 11 is equipped with a slidable piston rod 111, while elastic element brake cavity 12 is built-in an elastic element 112. When piston rod 111 moves, it will compress or release elastic element 112, thereby generating braking force. Accumulator 20 is a device that can store pressure energy and release when needed. It is usually used in hydraulic system to maintain stable system pressure, or provide emergency pressure source when main oil supply system fails. Control valve 30 is a key component, responsible for adjusting the direction and flow of hydraulic oil. It has oil inlet 31, oil outlet 32 and return port 33. Oil inlet 31 is connected to oil supply device to provide hydraulic oil for the system; brake cylinder 10 is connected to oil inlet 31 through its inlet; the inlet of accumulator 20 is connected to oil outlet 32; control valve 30 can control the flow of hydraulic oil from oil inlet 31 to oil outlet 32 or return port 33 by reversing adjustment, thereby affecting the action of brake cylinder. Control device is an electronic control system connected to brake cylinder 10, accumulator 20 and control valve 30, which is responsible for issuing instructions according to preset conditions or sensor feedback information to control the working state of the above components to realize automatic braking process. Specifically, when the system is in non-braking state, control valve 30 remains in default position, allowing oil inlet 31 to communicate with return port 33, allowing hydraulic oil to circulate freely to maintain the system's ready state. Accumulator 20 is pre-filled with a certain amount of compressed gas or hydraulic oil to store energy to provide pressure quickly when needed. When AGV control system decides to brake (for example, detects obstacles, reaches destination or receives stop command), it will send brake signal to control device. After receiving the brake signal, the control device will activate the control valve 30 to switch to braking mode. At this time, oil inlet 31 communicates with oil outlet 32, while disconnected from return port 33. Oil supply device provides high-pressure hydraulic oil for brake cylinder 10 through oil inlet 31, while part of the hydraulic oil also flows to accumulator 20 for energy storage. High-pressure hydraulic oil enters the rod cavity 11 of brake cylinder 10, pushing the piston rod 111 to move, thereby exerting pressure on the elastic element 112. While the elastic element 112 is compressed, it generates a counterforce, which is transmitted to the wheel brake pad or other brake components through the piston rod 111, thereby achieving vehicle deceleration or stopping. During braking, if long-term braking is needed, accumulator 20 can continue to provide the necessary pressure to ensure that braking can continue effectively even if the main oil supply system fails. When braking needs to be released, the control system sends a signal to release braking.The control device changes the position of the control valve 30 again, so that the hydraulic oil can flow back from the brake oil cylinder 10 to the oil tank, and the excess hydraulic oil is discharged through the oil return port 33. The piston rod 111 is reset due to the restoring force of the elastic member 112, and the pressure on the brake pad is released, and the AGV can be restarted or continue to drive. During the whole process, the control device continuously monitors the state of each component and adjusts the operation according to the actual situation to ensure the safety and stability of the braking process. This system allows the AGV to accurately control the braking process through the hydraulic system during operation, and uses the accumulator to ensure emergency braking even in the event of power failure or other major system failures, uses the force of the mechanical spring to achieve braking, reduces the dependence on electronic or other error-prone systems, improves the safety and reliability of the AGV, improves safety, improves braking effect, and reduces production costs.

[0037] Referring to Figures 1-2 In the embodiments of the present application, the brake oil cylinder 10 is a normally closed brake brake oil cylinder, which is in a locked state when there is no hydraulic oil.

[0038] The brake oil cylinder 10 is a normally closed (fail-safe) brake brake oil cylinder, which means that when there is no hydraulic oil pressure, the spring force will automatically lock the brake in the braking state. In this design, the elastic member 112 applies a pre-tightening force to the piston rod 111, so that when there is no external hydraulic oil pressure, the piston rod pushes the brake assembly to achieve automatic braking of the vehicle. Only when the hydraulic system provides sufficient pressure to overcome the spring force, the piston rod will retract, thereby releasing the brake and allowing the vehicle to move. The normally closed brake ensures that the vehicle will automatically stop even in the worst case (such as power failure, control system failure, etc.), avoiding potential safety accidents. Since the braking is achieved by the force of the mechanical spring rather than relying on electronic or other error-prone systems, the overall reliability of the system is improved. Compared with the normally open brake, the normally closed brake is usually simpler in structure and easier to maintain. When braking is not needed, the system only needs to maintain a small amount of hydraulic pressure to keep the release state, and when braking is needed, the energy of the spring is used, which can save energy. The design of the normally closed brake brake oil cylinder is to improve the safety and reliability of the AGV, to ensure that it can be quickly and effectively braked in any abnormal situation, and to protect the safety of personnel and equipment.

[0039] Referring to Figures 1-2 In the embodiments of the present application, the hydraulic system for AGV automatic braking further comprises a pipeline assembly 40, the pipeline assembly 40 comprises a first pipeline 41 and a second pipeline 42, the inlet of the brake oil cylinder 10 is connected to the oil inlet 31 through the first pipeline 41, and the inlet of the accumulator 20 is connected to the oil outlet 32 through the second pipeline 42.

[0040] The first pipe 41 connects the inlet of the brake cylinder 10 with the oil inlet 31 of the control valve 30. This pipe is responsible for delivering high-pressure hydraulic oil from the oil supply device (such as a hydraulic pump) to the brake cylinder 10 to overcome the spring force and release the brake state. The second pipe 42 connects the inlet of the accumulator 20 with the oil outlet 32 of the control valve 30. This pipe allows hydraulic oil to flow into the accumulator 20 for energy storage when needed, and also provides pressure from the accumulator 20 in emergency situations. By having separate first and second pipes 41 and 42, it is more convenient to expand or modify the system, such as adding more brake cylinders or changing the location of the accumulator. The separate pipes make installation more intuitive, and maintenance personnel can more easily identify and handle problems. If a section of the pipe is problematic, it can be replaced or repaired without affecting the entire system. The separate design of the first and second pipes 41 and 42 helps prevent cross-contamination of hydraulic oil between different functions, maintaining the cleanliness and efficiency of the system. Even if one pipe leaks or fails, the other pipe can still maintain basic functions, improving the redundancy and reliability of the system. In emergency situations, even if the control system fails, the accumulator 20 can still provide the necessary pressure to the brake cylinder 10 through the second pipe 42, ensuring that the normally closed brake can function, ensuring the safe stop of the AGV. The separate pipe design can help more accurately control the flow direction and flow of hydraulic oil, enabling more precise brake control, which is particularly important for AGVs that require high-precision positioning and operation.

[0041] With reference to Figures 1-2 When the control valve 30 is powered, the oil inlet 31 and the oil outlet 32 are opened, the control valve 30 supplies oil to the brake cylinder 10 and the accumulator 20, the piston rod 111 moves, and the elastic member 112 can be elastically deformed to release the locking state of the brake.

[0042] When the control valve 30 is powered on, the oil inlet 31 and the oil outlet 32 are opened, and the control valve 30 supplies oil to the brake cylinder 10 and the accumulator 20, so that the piston rod 111 moves, and the elastic element 112 (which can be a spring) can be elastically deformed to release the locking state of the brake. Specifically, when the control system issues a brake release command, the control valve 30 is activated (powered on), and the valve mechanism inside the control valve 30 changes position to connect the oil inlet 31 and the oil outlet 32. Hydraulic oil enters the control valve 30 from the oil supply device through the oil inlet 31. The control valve 30 distributes hydraulic oil to two directions: one part flows to the brake cylinder 10, and the other part flows to the accumulator 20. In the brake cylinder 10, the hydraulic oil enters the rod cavity 11, pushes the piston rod 111 to move outward against the pressure of the elastic element 112, thereby releasing the pressure on the wheels or other brake components and unlocking the brake. The elastic element 112 is compressed in this process and stores energy for the next brake. Specifically, when the brake is released, the hydraulic oil enters the rod cavity 11 to push the piston rod 111 to move, overcoming the pre-tightening force of the elastic element 112, and the elastic element 112 keeps the piston rod 111 in the locked position with its own elastic force, thereby releasing the pressure on the wheels or other brake components. In this process, the elastic element 112 is further compressed and stores energy. The accumulator 20 receives and stores part of the hydraulic oil as a backup pressure source in emergency situations. If the main oil supply system fails, the accumulator 20 can quickly release the stored energy to ensure that the brake system still works normally. The control valve 30 changes the flow direction of the hydraulic oil immediately after being powered on, so that the brake cylinder 10 can quickly release the brake state, improving the operation efficiency and flexibility of the AGV. This design ensures that even if the main oil supply system fails, the accumulator 20 can provide the necessary pressure to release or reapply the brake, increasing the redundancy and reliability of the system.

[0043] With reference to Figures 1-2 When the control valve 30 is powered off, the oil return port 33 is opened, the hydraulic oil in the brake cylinder 10 and the accumulator 20 flows back, the piston rod 111 retracts, and the elastic element 112 resets to make the brake in the locked state.

[0044] When the control valve 30 is powered off, the return port 33 opens, the hydraulic oil in the brake cylinder 10 and the accumulator 20 flows back, the piston rod 111 retracts, and the elastic element 112 (which can be a spring) resets, so that the brake is in a locked state. This design ensures that the AGV can automatically enter a safe braking state when it is not needed to move or in an emergency. Specifically, when the control system decides to activate the brake (for example, reaching the destination, detecting obstacles or system failure), it will cut off the power supply to the control valve 30. At this time, the valve mechanism inside the control valve 30 changes position, so that the return port 33 opens. The hydraulic oil in the brake cylinder 10 flows to the return port 33 and eventually returns to the oil tank. Similarly, the hydraulic oil stored in the accumulator 20 also flows to the return port 33, helping to maintain the pressure balance of the system. As the hydraulic oil flows back, the pressure acting on the piston rod 111 disappears, and the elastic element 112 begins to reset due to its pre-tightening force, pushing the piston rod 111 to move inward. During this process, the piston rod 111 exerts pressure on the wheels or other brake components, thereby activating the brake to stop the AGV. Immediately after the control valve 30 is powered off, it switches to the return mode, so that the hydraulic oil flows back quickly, and the elastic element 112 can quickly reset to achieve immediate braking, improving the response speed of the system. The elastic element 112, as a mechanical component, can work reliably without external energy, increasing the overall reliability of the system and reducing the risk of relying on electronic or hydraulic systems. The entire braking process can be controlled through simple power-on / off operations, reducing the complexity of the control system and reducing potential failure points. Only when the brake is released does it consume energy (i.e., the control valve is powered on), and when it is not needed to move, the system is in a low-energy standby state, which helps to save energy. The design structure is relatively simple, easy to understand and maintain.

[0045] With reference to Figures 1-2 In the embodiment of the utility model, the hydraulic system for AGV automatic brake further includes first pressure detection device 50, control device with first pressure detection device 50 electricity is connected, when first pressure detection device 50 detects that the pressure of accumulator 20 reaches the highest set value, control device controls accumulator 20 and stops energy storage.

[0046] The first pressure detection device 50 is added to the hydraulic system for AGV automatic braking and is electrically connected with the control device. When the first pressure detection device 50 detects that the pressure of the accumulator 20 reaches the highest set value, the control device triggers the accumulator 20 to stop storing energy. This design is to ensure the safety and stability of the system, and at the same time optimize the working state of the accumulator. It can be understood that the first pressure detection device 50 is a sensor or similar device for real-time monitoring of the pressure level in the accumulator 20. It can feed back the detected pressure data to the control device. The control device receives the pressure signal from the first pressure detection device 50 and determines whether to take action according to the preset logic. If it is detected that the pressure exceeds the set safety upper limit (the highest set value), the control device will issue an instruction to make the accumulator 20 release excess energy. Through the control valve 30 or other specially designed pressure relief valve, part of the hydraulic oil in the accumulator 20 can be selectively released to reduce its internal pressure and prevent overpressure from causing damage to the system. It can be understood that when the AGV starts to work, the hydraulic oil enters the control valve 30 from the oil inlet 31, the control valve 30 injects the hydraulic oil into the brake cylinder 10 through the oil outlet 32, the piston push rod 111 in the brake cylinder 10 pushes the release mechanical brake forward (reaches the brake release state), and simultaneously compresses the elastic element 112; when the elastic element 112 is compressed to the bottom, the system pressure increases, the accumulator 20 stores energy, the first pressure detection device 50 (high pressure early warning) detects the pressure, and after reaching the early warning pressure, it is fed back to the AGV control system. The AGV control system controls the control valve 30 to be disconnected and sends a signal to the AGV hydraulic power unit to stop working, and the accumulator 20 stops storing energy, at which time the mechanical brake release work is completed.

[0047] With reference to Figures 1-2 In the embodiment of the utility model, the hydraulic system for AGV automatic braking further includes a second pressure detection device 60, and the control device is electrically connected with the second pressure detection device 60. When the second pressure detection device 60 detects that the pressure of the accumulator 20 reaches the lowest set value, the control device controls the accumulator 20 and the brake cylinder 10 to store energy.

[0048] The second pressure detection device 60 is added to the hydraulic system for AGV automatic braking and is electrically connected with the control device. When the second pressure detection device 60 detects that the pressure of the accumulator 20 reaches the minimum set value, the control device triggers the accumulator 20 and the brake cylinder 10 to store energy. This design aims to ensure that the system can still maintain sufficient energy reserve under low pressure conditions to maintain normal braking function and emergency response capability. The second pressure detection device 60 is a sensor or similar device specifically designed to monitor the pressure level in the accumulator 20 in real time and feed back the data to the control device. The control device receives the pressure signal from the second pressure detection device 60. When the pressure of the accumulator 20 is detected to drop to the minimum set value, the control device will perform the energy storage operation, that is, through the oil supply device to supplement the hydraulic oil to the accumulator 20, at the same time, it can also provide additional hydraulic oil for the brake cylinder 10, so that the piston rod 111 further compresses the spring 112, increases its energy storage, and prepares for the next braking. The control valve 30 adjusts the flow direction of the hydraulic oil according to the instruction of the control device, ensuring that the hydraulic oil can effectively flow into the accumulator 20 and the brake cylinder 10, thereby increasing their pressure level and ensuring the energy reserve of the system. Even in the case of long-term non-use or system leakage, by timely supplementing the hydraulic oil, it can ensure that the accumulator 20 and the brake cylinder 10 are always within a safe working pressure range, ensuring the effectiveness of the braking system. By monitoring and adjusting the pressure of the accumulator 20 and the brake cylinder 10, the pressure of the entire hydraulic system is ensured to be within a reasonable range, improving the overall reliability and stability of the system. The pre-stored energy can provide immediate braking force when rapid braking is needed, enhancing the emergency response capability of the system, which is particularly important in emergency situations. By maintaining appropriate hydraulic oil pressure, mechanical stress and wear caused by insufficient pressure are reduced, which helps to prolong the service life of the entire hydraulic system. It can be understood that when the AGV is working, the accumulator 20 is in a full energy storage state, reaching the maximum pressure value state of the first pressure detection device 50 (high pressure warning). At this time, if the brake cylinder 10 cannot guarantee the mechanical brake release state due to the compression of the elastic element 112, the accumulator 20 will release the stored pressure to ensure that the mechanical brake is always in a released state. When the pressure in the accumulator 20 is released to a certain extent and reaches the warning value of the second pressure detection device 60 (low pressure warning), the second pressure detection device 60 (low pressure warning) feeds back the signal to the AGV control system, which controls the control valve 30 to attract and sends a signal to the AGV hydraulic power unit to work to provide hydraulic oil into the control valve 30, continuously supplying energy to the brake cylinder 10 and the accumulator 20, until the first pressure detection device 50 (high pressure warning) 2 reaches the warning value to stop the energy storage work, and the mechanical brake release work is completed again.

[0049] Reference Figures 1-2In the embodiment of the present application, the first pressure detection device 50 and the second pressure detection device 60 are connected to the control valve 30 respectively.

[0050] The control valve 30 is the key control point of the hydraulic oil flow, and directly obtaining pressure information here can ensure that the control system can immediately make adjustments according to the latest pressure data, improving the response speed of the system. The first pressure detection device 50 is used for monitoring the maximum pressure of the accumulator 20, and the second pressure detection device 60 is used for monitoring the minimum pressure. The two work together to provide accurate control strategies in different situations, ensuring that the system is always in the best working condition. Since all pressure sensors are concentrated near the control valve 30, maintenance personnel can more easily troubleshoot and maintain the system, reducing the time and difficulty of finding problems.

[0051] With reference to Figures 1-2 In the embodiment of the present application, the first pressure detection device 50 and the second pressure detection device 60 are both pressure sensors.

[0052] Pressure sensors can provide very accurate pressure readings, ensuring that the data received by the control system is reliable. This is crucial for maintaining the stable operation of the AGV automatic braking hydraulic system. Pressure sensors can monitor pressure changes in the hydraulic system in real time and quickly transmit information to the control device. This allows the system to make adjustments in the first time, improving the response speed. Modern pressure sensors are usually small and easy to integrate into existing hydraulic systems, reducing the need for additional installation space, simplifying wiring and interface connections.

[0053] With reference to Figures 1-2 Figures 1-2 In the embodiment of the present application, the control valve 30 is an electromagnetic control valve.

[0054] The electromagnetic control valve controls the opening and closing state of the valve through the on-off of the electromagnetic coil, has very fast response speed, and can complete the operation within milliseconds. This is crucial for AGVs that need to brake or release the brake quickly. The electromagnetic control valve can achieve very fine pressure and flow control, ensuring that the pressure of the hydraulic system is always within the set range, improving the stability and reliability of the system.

[0055] The utility model also relates to an AGV, the AGV includes above-mentioned for AGV automatic brake's hydraulic system, for AGV automatic brake's hydraulic system includes brake cylinder 10, brake cylinder 10 includes the rod cavity 11 and with the rod cavity 11 intercommunication's elastic piece brake chamber 12, the rod cavity 11 inside slidingly connected has piston rod 111, elastic piece brake chamber 12 is provided with elastic piece 112, piston rod 111 with elastic piece 112 elastic connection, brake cylinder 10 is used for brake's brake, energy accumulator 20 is used for energy storage, control valve 30, control valve 30 has oil inlet 31, oil outlet 32 and oil return 33 in series, oil inlet 31 is used for connecting oil supply device, the import of brake cylinder 10 is connected in oil inlet 31, the import of energy accumulator 20 is connected in oil outlet 32, control valve 30 is used for realizing the reversing adjustment of oil inlet 31 and oil outlet 33, control device, control device is electrically connected with brake cylinder 10, energy accumulator 20 and control valve 30 respectively.

[0056] The utility model discloses still propose a kind of AGV, all technical solutions of above-mentioned all embodiments are adopted, thus also have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer one by one elaboration.

[0057] The above-mentioned is only the exemplary embodiment of the utility model, and not therefore limit the patent range of the utility model, all equivalent structural transformations made in the technical concept of the utility model using the utility model specification and attached drawing contents, or direct / indirectly applied in other related technical fields are included in the patent protection range of the utility model.

Claims

1. A hydraulic system for AGV automatic braking, characterized in that, The hydraulic system for AGV automatic braking comprises a brake cylinder, an accumulator, a control valve and a control device. The brake cylinder comprises a rod cavity and an elastic brake cavity in communication with the rod cavity, a piston rod is slidably connected in the rod cavity, and an elastic member is arranged in the elastic brake cavity. The accumulator is used for energy storage. The control valve is connected in series with an oil inlet, an oil outlet and an oil return. The control device is electrically connected with the brake cylinder, the accumulator and the control valve respectively.

2. The hydraulic system for AGV automatic braking according to claim 1, characterized in that, The brake cylinder is a normally closed brake cylinder, and the brake is in a locked state when no hydraulic oil acts. The hydraulic system for AGV automatic braking further comprises a pipeline assembly, the pipeline assembly comprises a first pipeline and a second pipeline, and the inlet of the brake cylinder is connected to the oil inlet through the first pipeline, and the inlet of the accumulator is connected to the oil outlet through the second pipeline.

3. The hydraulic system for AGV automatic braking according to claim 1, characterized in that, When the control valve is powered, the oil inlet and the oil outlet are opened, the control valve supplies oil to the brake cylinder and the accumulator, the piston rod moves, and the elastic member can be elastically deformed to release the locked state of the brake.

4. The hydraulic system for AGV automatic braking according to claim 1, characterized in that, When the control valve is powered off, the oil return is opened, the hydraulic oil in the brake cylinder and the accumulator flows back, the piston rod retracts, and the elastic member resets to make the brake in a locked state.

5. The hydraulic system for AGV automatic braking according to claim 1, characterized in that, The hydraulic system for AGV automatic braking further comprises a first pressure detection device, and the control device is electrically connected with the first pressure detection device.

6. The hydraulic system for AGV automatic braking according to claim 5, characterized in that, When the first pressure detection device detects that the pressure of the accumulator reaches the highest set value, the control device controls the accumulator to stop storing energy.

7. The hydraulic system for AGV automatic braking according to claim 6, characterized in that, The hydraulic system for AGV automatic braking further comprises a second pressure detection device, and the control device is electrically connected with the second pressure detection device.

8. The hydraulic system for AGV automatic braking according to claim 7, characterized in that, When the second pressure detection device detects that the pressure of the accumulator reaches the lowest set value, the control device controls the accumulator and the brake cylinder to store energy.

9. The hydraulic system for AGV automatic braking according to claim 1, characterized in that, The first pressure detection device and the second pressure detection device are connected to the control valve respectively.

10. An AGV vehicle characterized by comprising: The first pressure detection device and the second pressure detection device are both pressure sensors. The control valve is an electromagnetic control valve. The hydraulic system for AGV automatic braking comprises a brake cylinder, an accumulator, a control valve and a control device. The brake cylinder comprises a rod cavity and an elastic brake cavity in communication with the rod cavity, a piston rod is slidably connected in the rod cavity, and an elastic member is arranged in the elastic brake cavity. The accumulator is used for energy storage. The control valve is connected in series with an oil inlet, an oil outlet and an oil return. The control device is electrically connected with the brake cylinder, the accumulator and the control valve respectively. The brake cylinder is a normally closed brake cylinder, and the brake is in a locked state when no hydraulic oil acts. The brake cylinder is a normally closed brake cylinder, and the brake is in a locked state when no hydraulic oil acts. The hydraulic system for AGV automatic braking further comprises a pipeline assembly, the pipeline assembly comprises a first pipeline and a second pipeline, and the inlet of the brake cylinder is connected to the oil inlet through the first pipeline, and the inlet of the accumulator is connected to the oil outlet through the second pipeline. The hydraulic system for AGV automatic braking further comprises a first pressure detection device, and the control device is electrically connected with the first pressure detection device. When the first pressure detection device detects that the pressure of the accumulator reaches the highest set value, the control device controls the accumulator to stop storing energy. The hydraulic system for AGV automatic braking further comprises a second pressure detection device, and the control device is electrically connected with the second pressure detection device. When the second pressure detection device detects that the pressure of the accumulator reaches the lowest set value, the control device controls the accumulator and the brake cylinder to store energy. The first pressure detection device and the second pressure detection device are connected to the control valve respectively. The first pressure detection device and the second pressure detection device are both pressure sensors. The control valve is an electromagnetic control valve. The hydraulic system for AGV automatic braking comprises a brake cylinder, an accumulator, a control valve and a control device. The brake cylinder comprises a rod cavity and an elastic brake cavity in communication with the rod cavity, a piston rod is slidably connected in the rod cavity, and an elastic member is arranged in the elastic brake cavity. The accumulator is used for energy storage. The control valve is connected in series with an oil inlet, an oil outlet and an oil return. The control device is electrically connected with the brake cylinder, the accumulator and the control valve respectively.

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