Reversing valve system, hydraulic transmission system and vehicle

Abstract

This disclosure relates to a directional control valve system, a hydraulic transmission system, and a vehicle, falling within the field of automation. The directional control valve system includes: a power supply assembly; a directional control valve; a power supply circuit, a first terminal of which is connected to the power supply assembly, and a second terminal of which is connected to a first power supply node of the directional control valve; and a power supply switching module, a first terminal of which is connected to the power supply assembly, and a second terminal of which is connected to a second power supply node of the directional control valve. The power supply switching module is used to, in the event of an open circuit in the power supply circuit, reconnect the circuit between the power supply assembly and the second power supply node. This system can prevent power outages in the directional control valve system.

Description

Technical Field

[0001] This disclosure relates to the field of automation technology, and more specifically, to a directional valve system, a hydraulic transmission system, and a vehicle. Background Technology

[0002] Electro-controlled directional valves have been applied in many fields. For example, in automated unloading vehicles, by configuring electro-controlled directional valves into the hydraulic transmission system, the automated unloading process of automated unloading vehicles can be realized.

[0003] However, the power supply to the electrically controlled directional valve should not be interrupted easily during operation, as a power outage could cause a major production accident or significant losses. Summary of the Invention

[0004] The purpose of this disclosure is to provide a directional valve system, a hydraulic transmission system, and a vehicle.

[0005] According to a first aspect of the present disclosure, a reversing valve system is provided, comprising: Power supply components; Reversing valve; A power supply circuit, wherein a first terminal of the power supply circuit is connected to the power supply component, and a second terminal of the power supply circuit is connected to the first power supply node of the reversing valve; A power supply switching module, wherein a first end of the power supply switching module is connected to the power supply component, and a second end of the power supply switching module is connected to the second power supply node of the reversing valve; The power supply switching module is used to connect the circuit between the power supply component and the second power node in the event of a power supply circuit failure.

[0006] Optionally, the power supply switching module includes a relay, the first input node of the relay is connected to the first power supply node, the second input node of the relay is connected to the power supply component, the first output node of the relay is grounded, and the second output node of the relay is connected to the second power supply node.

[0007] Optionally, the second output node includes a first contact and a second contact; Wherein, when there is current input at the first input node, the second input node in the relay contacts the first contact to disconnect the circuit between the power supply component and the second power supply node; When there is no current input at the first input node, the second input node in the relay contacts the second contact to conduct the circuit between the power supply component and the second power node.

[0008] Optionally, the power supply component is connected to the first terminal of the power supply circuit and the first terminal of the power supply switching module via a switching component.

[0009] Optionally, the power supply circuit includes a first fuse, and the power supply switching module further includes a second fuse, which is disposed between the second power node and the power component.

[0010] Optionally, the reversing valve includes at least one signal input node, which is used to control the reversing valve to be in the corresponding valve state.

[0011] Optionally, the directional valve system further includes a signal acquisition module for acquiring the signal input status of each node in the directional valve.

[0012] According to a second aspect of the present disclosure, a hydraulic transmission system is provided, including a hydraulic cylinder and a control system for the hydraulic cylinder, wherein the control system for the hydraulic cylinder is the directional valve system described in any one of the first aspects.

[0013] According to a third aspect of the present disclosure, an automated unloading vehicle is provided, including a cargo box and the hydraulic transmission system described in the second aspect.

[0014] Optionally, the vehicle further includes a status output module, which is used to output the working status of each node in the reversing valve.

[0015] The above technical solution, by setting a first power node and a second power node in the reversing valve, and setting a power supply switching module between the power component and the second power node, allows the power supply switching module to automatically reconnect the circuit between the power component and the second power node when the power supply circuit is broken, preventing the current from the power component from reaching the reversing valve. This ensures the normal operation of the reversing valve. Furthermore, the method of this embodiment requires only one power component, eliminating the need for an additional backup power supply and reducing power supply costs.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a reversing valve system according to an exemplary embodiment.

[0018] Figure 2 This is a schematic diagram of the structure of a vehicle according to an exemplary embodiment.

[0019] Explanation of reference numerals in the attached figures: 11-Power supply assembly; 12-Reversing valve; 121-First power node; 122-Second power node; 123-Signal input node; 13-Power supply circuit; 131-First fuse; 14-Power supply switching module; 141-First input node; 142-First output node; 143-Second input node; 144-First contact; 145-Second contact; 146-Second fuse; 15-Switch assembly; 16-Signal acquisition module; 17-Hydraulic cylinder; 18-Cargo box; 19-Electronic control unit. Detailed Implementation

[0020] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0021] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0022] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some implementations" means "at least some implementations". Definitions of other terms will be given in the following description.

[0023] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0024] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0025] The background of the embodiments of this disclosure will be described in detail below with reference to an exemplary application scenario: Taking automated guided vehicles (AGVs) as an example, during automated unloading operations, the hydraulic transmission system uses an electronically controlled directional valve to accurately control the lifting, lowering, stopping, and slow descent of the cargo box. However, when the intelligent electronically controlled directional valve loses power—for example, when the fuse in the system blows—the lifting, lowering, stopping, and slow descent of the cargo box become uncontrollable, posing a safety hazard to the driver and the vehicle. Therefore, it is necessary to prevent the intelligent electronically controlled directional valve from losing power.

[0026] To address the aforementioned problems, this disclosure provides a directional control valve system. By incorporating a first power node and a second power node within the directional control valve, and a power switching module between the power supply component and the second power node, a power supply switching module can automatically reconnect the circuit between the power supply component and the second power node when a power supply circuit failure prevents current from the power supply component from reaching the directional control valve. This allows current from the power supply component to reach the directional control valve, ensuring its normal operation. Furthermore, the method of this disclosure requires only one power supply component, eliminating the need for an additional backup power supply component and reducing power supply costs.

[0027] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a reversing valve system according to an exemplary embodiment, such as... Figure 1 As shown, the reversing valve system includes a power supply assembly 11, a reversing valve 12, a power supply circuit 13, and a power supply switching module 14. The first terminal of the power supply circuit 13 is connected to the power supply assembly 11, and the second terminal of the power supply circuit 13 is connected to the first power node 121 of the reversing valve 12. The first terminal of the power supply switching module 14 is connected to the power supply assembly 11, and the second terminal of the power supply switching module 14 is connected to the second power node 122 of the reversing valve 12. The power supply switching module 14 is used to reconnect the circuit between the power supply assembly 11 and the second power node 122 in the event of an open circuit in the power supply circuit 13.

[0028] The power supply component 11 is used to provide power for the operation of the reversing valve 12. When the power supply component 11 cannot supply power to the reversing valve 12, the operation of the reversing valve 12 is uncontrolled.

[0029] By employing the above method, a first power node 121 and a second power node 122 are provided in the reversing valve 12, and a power supply switching module 14 is provided between the power component 11 and the second power node 122. Thus, when the power supply circuit 13 is broken, preventing the current from the power component 11 from reaching the reversing valve 12, the power supply switching module 14 automatically connects the circuit between the power component 11 and the second power node 122, allowing the current from the power component 11 to reach the reversing valve 12, thereby ensuring the normal operation of the reversing valve 12. Furthermore, the method of this embodiment only requires one power component 11, eliminating the need for an additional backup power component 11, thus reducing power supply costs.

[0030] In some implementations, the first power node 121 and the second power node 122 may be the same power node.

[0031] In some implementations, when the power supply circuit 13 is not broken, that is, when the current of the power supply component 11 can reach the reversing valve 12 through the power supply circuit 13, the power supply switching module 14 disconnects the circuit between the power supply component 11 and the second power node 122. At this time, the current of the power supply component 11 cannot reach the reversing valve 12 through the power supply switching module 14.

[0032] In some embodiments, in order to ensure that the circuit between the power supply component 11 and the second power node 122 is continued in the event of an open circuit in the power supply circuit 13, the following steps are taken: Figure 1 As shown, the power supply switching module 14 includes a relay. The first input node 141 of the relay is connected to the first power supply node 121, the second input node 143 of the relay is connected to the power supply component 11, the first output node 142 of the relay is grounded, and the second output node of the relay is connected to the second power supply node 122.

[0033] The first input node 141 can be a relay coil current input node, and the first output node 142 can be a relay coil current output node. The second input node 143 can be the common contact of the relay.

[0034] In this embodiment of the present disclosure, by setting a relay and connecting the first input node 141 of the relay to the first power supply node 121, grounding the first output node 142 of the relay, connecting the second input node 143 of the relay to the power supply component 11, and connecting the second output node of the relay to the second power supply node 122, since the relay can change the state of the switch according to the current flow, the circuit between the power supply component 11 and the second power supply node 122 can be controlled by the open circuit state of the power supply circuit 13, that is, the current flowing through the first input node 141 and the first output node 142.

[0035] In some implementations, the second output node includes a first contact 144 and a second contact 145; When there is current input at the first input node 141, the second input node 143 in the relay contacts the first contact 144 to conduct the circuit between the power supply component 11 and the second power supply node 122. When there is no current input at the first input node 141, the second input node 143 in the relay contacts the second contact 145 to disconnect the circuit between the power supply assembly 11 and the second power supply node 122.

[0036] In this embodiment, the first contact 144 is a normally open contact and the second contact 145 is a normally closed contact. That is, when there is no current input to the first input node 141, the first contact 144 is in an open state and the second contact 145 is in a closed state, thereby connecting the circuit between the power supply component 11 and the second power node 122. When there is current input to the first input node 141, the first contact 144 is in a closed state and the second contact 145 is in an open state, thereby disconnecting the circuit between the power supply component 11 and the second power node 122.

[0037] In some embodiments, the relay is an electromagnetic relay, which also includes a coil, a spring, and an armature. When the power supply circuit 13 is turned on, current flows through the coil via the first input node 141, generating sufficient magnetic force to attract the armature to move, thereby closing or opening the connection between the normally open and normally closed contacts and the second input node 143, thereby controlling whether the circuit between the power supply component 11 and the second power supply node 122 is turned on or off.

[0038] In some embodiments, the power supply assembly 11 is connected to the first terminal of the power supply circuit 13 and the first terminal of the power supply switching module 14 via the switching assembly 15.

[0039] In this embodiment of the present disclosure, the switching assembly 15 can be used to manage the entire operation of the reversing valve 12. When the switching assembly 15 is open, the reversing valve 12 is not energized; when the switch is closed, the reversing valve 12 is energized through the first power node 121 or the second power node 122.

[0040] In some embodiments, the power supply circuit 13 includes a first fuse 131, and the power supply switching module 14 further includes a second fuse 146, which is disposed between the second power node 122 and the power component 11.

[0041] In this embodiment of the present disclosure, the first fuse 131 can protect the power supply circuit 13 from damage caused by overload and short circuit. The second fuse 146 can protect the circuit between the second power node 122 and the power supply assembly 11 from damage caused by overload and short circuit.

[0042] In some embodiments, the directional valve 12 includes at least one signal input node 123, which is used to control the directional valve 12 to be in a corresponding valve state.

[0043] In this embodiment of the disclosure, by inputting a signal to the corresponding signal input node 123, the directional valve 12 can be controlled to be in a corresponding valve state. For example, the valve can be in a fully open or fully closed state. Furthermore, by changing the valve state of the directional valve 12, the operation of the equipment to which the directional valve 12 belongs can be controlled.

[0044] In some implementations, the directional valve system may also include a signal acquisition module 16 for acquiring the signal input status of each node in the directional valve 12.

[0045] In this embodiment of the disclosure, a signal acquisition module 16 is also provided. The signal acquisition module 16 can acquire the signal input of each node in the reversing valve 12. For example, it can acquire which node in the reversing valve 12 has a signal input, thereby understanding the working status of the reversing valve 12.

[0046] Optionally, the nodes acquired by the signal acquisition module 16 may include signal input nodes 123, a first power supply node 121, and a second power supply node 122, etc.

[0047] In another exemplary embodiment, a hydraulic transmission system is also provided, which includes a hydraulic cylinder 17 and a control system for the hydraulic cylinder 17. The control system for the hydraulic cylinder 17 is the directional valve system in the foregoing embodiment.

[0048] In another exemplary embodiment, a vehicle is also provided, the vehicle including a cargo box 18 and the hydraulic transmission system of the foregoing embodiment.

[0049] In this embodiment of the disclosure, the cargo box 18 can be raised or lowered via a hydraulic transmission system to complete the unloading of the vehicle.

[0050] In another exemplary embodiment, a vehicle is also provided, the vehicle including a cargo box 18 and the reversing valve system of the foregoing embodiment.

[0051] Optionally, the vehicle also includes a status output module, which is used to output the working status of each node in the directional valve 12.

[0052] The nodes may include, for example, various signal input nodes 123, a first power supply node 121, and a second power supply node 122.

[0053] In this embodiment of the disclosure, a status output module can be set in the vehicle. The status output module includes, but is not limited to, outputting the working status of each node in the reversing valve 12 through prompt sounds, indicator lights, display screens, etc.

[0054] The following is combined Figure 2 The schematic diagram of the vehicle shown illustrates the working process of the vehicle according to an embodiment of this disclosure.

[0055] like Figure 2 As shown, the vehicle includes a cargo box 18 and a hydraulic transmission system. The hydraulic transmission system includes a hydraulic cylinder 17 and a reversing valve system. The reversing valve system includes a power supply component 11, a switch component 15, a reversing valve 12, a power supply circuit 13, a power supply switching module 14, and a signal acquisition module 16.

[0056] The switch assembly 15 can be an ignition switch in the vehicle, which closes when the vehicle is started. The switch assembly 15 is connected to the power supply assembly 11.

[0057] The reversing valve 12 includes a first power node 121, a second power node 122, and three signal input nodes 123. The three signal input nodes 123 are a lifting node, a lowering node, and a sudden descent node, which are used to control the reversing valve 12 to be in the corresponding valve state, thereby realizing the lifting, lowering, and sudden descent of the cargo box 18.

[0058] The power supply circuit 13 includes a first fuse 131, the two ends of which are connected to the first power node 121 and the switch assembly 15, respectively.

[0059] The power supply switching module 14 includes a relay. The first input node 141 of the relay is connected to the first power supply node 121. The second input node 143 of the relay is connected to the switch assembly 15. The first output node 142 of the relay is grounded. The second output node of the relay includes a first contact 144 and a second contact 145. The second contact 145 is connected to the second power supply node 122.

[0060] The signal acquisition module 16 is connected to the first power node 121, the second power node 122 and three signal input nodes 123, and is used to acquire the signal input status of the nodes.

[0061] The vehicle's operating process is as follows: When the vehicle starts, the switch assembly 15 closes, and the reversing valve 12 is normally energized through the first fuse 131. The reversing valve 12 can perform lifting, lowering, and slow-lowering operations according to user operation. At this time, the first input node 141 of the relay is energized, the first output node 142 is grounded, and the relay is in the energized state. The second input node 143 receives power from the power supply assembly 11 through the second fuse 146, and the second contact 145 is floating. The relay is energized but does not output power to the reversing valve 12. If an abnormality occurs in the vehicle wiring, such as the first fuse 131 blowing, the reversing valve 12 is energized through the power supply switching module 14 to ensure the safety of the vehicle's lifting and lowering. At this time, the first input node 141 is de-energized, the relay is in the released state, the second input node 143 and the second contact 145 are connected, and power is supplied to the reversing valve 12 through the second power node 122 to ensure safety.

[0062] When the lifting node of the reversing valve 12 receives a control electrical signal, the hydraulic oil drives the hydraulic cylinder 17, which lifts the cargo box 18, allowing the cargo to be unloaded.

[0063] When the descent node of the reversing valve 12 receives a control electrical signal, the hydraulic cylinder 17 lowers the cargo box 18 under the weight of the lifting cargo box 18.

[0064] When the control signal is input to the slow-descent node of the directional valve 12, the oil port becomes smaller, and the hydraulic cylinder 17 causes the cargo box 18 to slowly fall back under the action of its own weight.

[0065] When the lifting, lowering, and slow-descent nodes of the reversing valve 12 have no input control electrical signals, and the first power node 121 or the second power node 122 is energized, the cargo box 18 neither lifts nor lowers and is in a stopped state.

[0066] Furthermore, in this embodiment of the present disclosure, the signal acquisition module 16 is connected to the electronic control unit (ECU) 19, so that the ECU 19 can analyze the signal input of the control signal, obtain the working status of the cargo box 18, and output the working status of the cargo box 18 through the vehicle-mounted communication terminal (T-BOX) in the vehicle.

[0067] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0068] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0069] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A directional control valve system, characterized in that, include: Power supply components; Reversing valve; A power supply circuit, wherein a first terminal of the power supply circuit is connected to the power supply component, and a second terminal of the power supply circuit is connected to the first power supply node of the reversing valve; A power supply switching module, wherein a first end of the power supply switching module is connected to the power supply component, and a second end of the power supply switching module is connected to the second power supply node of the reversing valve; The power supply switching module is used to connect the circuit between the power supply component and the second power node in the event of a power supply circuit failure. The power supply switching module includes a relay, the first input node of the relay is connected to the first power supply node, the second input node of the relay is connected to the power supply component, the first output node of the relay is grounded, the second output node of the relay is connected to the second power supply node, and the second output node includes a first contact and a second contact. Wherein, when there is current input at the first input node, the second input node in the relay contacts the first contact to disconnect the circuit between the power supply component and the second power supply node; When there is no current input at the first input node, the second input node in the relay contacts the second contact to conduct the circuit between the power supply component and the second power node.

2. The system according to claim 1, characterized in that, The power supply component is connected to the first terminal of the power supply circuit and the first terminal of the power supply switching module via a switching component.

3. The system according to claim 1, characterized in that, The power supply circuit includes a first fuse, and the power supply switching module further includes a second fuse, which is disposed between the second power node and the power component.

4. The system according to claim 1, characterized in that, The reversing valve includes at least one signal input node, which is used to control the reversing valve to be in the corresponding valve state.

5. The system according to claim 1, characterized in that, The directional valve system also includes a signal acquisition module for acquiring the signal input status of each node in the directional valve.

6. A hydraulic transmission system, characterized in that, It includes a hydraulic cylinder and a control system for the hydraulic cylinder, wherein the control system for the hydraulic cylinder is the directional valve system according to any one of claims 1-5.

7. A vehicle, characterized in that, It includes a cargo box and the hydraulic transmission system as described in claim 6.

8. The vehicle according to claim 7, characterized in that, The vehicle also includes a status output module, which is used to output the working status of each node in the reversing valve.

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