Control circuit for emergency steering of loading machine

Abstract

The utility model relates to the field of engineering machinery, in particular to a control circuit for emergency steering of a loading machine, which comprises a power supply, a whole vehicle controller and an electric hydraulic oil pump arranged on a steering oil way, and an emergency steering relay for controlling the on-off of a power supply loop of the electric hydraulic oil pump is arranged on the power supply loop of the electric hydraulic oil pump. The control end of the emergency steering relay is electrically connected with the vehicle control unit, the emergency steering switch is used for controlling the emergency steering relay and electrically connected with the vehicle control unit, and the electronic controller is used for controlling the emergency steering relay when an engine flames out. According to the control circuit for emergency steering of the loading machine, when an engine suddenly flames out and a steering hydraulic pump driven by the engine fails, an emergency steering system can intervene in time, oil is supplied to a steering oil way through the electric hydraulic pump, and therefore the driving safety of a driver is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a control circuit for emergency steering of a loader. Background Art

[0002] A loader is a type of earthwork machinery widely used in construction projects such as roads, railways, buildings, hydropower, ports, and mines. It is mainly used to shovel bulk materials such as soil, sand, lime, and coal. It can also perform light shoveling operations on ore, hard soil, etc. By replacing different auxiliary working devices, it can also perform bulldozing, lifting, and loading and unloading of other materials such as wood.

[0003] For large-mass construction machinery such as loaders, if the engine suddenly stalls when traveling at a high speed, the engine-driven steering hydraulic pump will fail and the steering oil circuit will not be able to supply oil normally. If the road ahead is a 90° right-angle bend at this time, it will not be possible to brake in time, affecting driving safety. This poses a safety hazard and needs to be improved. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a control circuit for emergency steering of a loader which can timely switch on and protect the driver's safety when the engine is turned off.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses a control circuit for emergency steering of a loader, including a power supply and a vehicle controller. Its structural characteristics are that it also includes an electric hydraulic oil pump installed on the steering oil circuit, an emergency steering relay for controlling the on-off of its circuit is installed on the power supply circuit of the electric hydraulic oil pump, the control end of the emergency steering relay is electrically connected to the vehicle controller, and also includes an emergency steering switch for controlling the emergency steering relay, the emergency steering switch is electrically connected to the vehicle controller, and also includes an electronic controller for controlling the emergency steering relay when the engine is turned off.

[0006] When the driver actively presses the emergency steering switch, the control relay signal end circuit is connected, the control relay switch end is closed, and the electric hydraulic pump is powered to supply oil to the steering oil circuit; when the engine suddenly stalls, the electronic controller sends a speed message through the bus. When the vehicle controller collects the engine speed from the bus and it is lower than 500 rpm, the control relay signal end circuit is immediately connected, the control relay switch end is closed, and the electric hydraulic pump is powered to supply oil to the steering oil circuit. This circuit can intervene in the emergency steering system when the engine suddenly stalls and the engine-driven steering hydraulic pump fails, thereby ensuring the driver's driving safety.

[0007] In order to ensure the power supply safety of the electric hydraulic oil pump, the electric hydraulic oil pump is connected to the power supply to form a power supply circuit, and a hydraulic oil pump fuse is installed on the power supply circuit of the electric hydraulic oil pump.

[0008] Preferably, the electronic controller is connected to the vehicle controller via a CAN bus. When the engine suddenly shuts down, the electronic controller sends a speed message via the bus. When the vehicle controller collects engine speed data from the bus that is lower than 500 rpm, the relay signal end loop is immediately controlled to be connected, and the relay switch end is controlled to be closed.

[0009] In order to ensure the power supply safety of the electronic controller, the electronic controller is connected to the power supply to form a power supply circuit, and an ECU fuse is installed on the power supply circuit of the electronic controller.

[0010] In order to ensure the power supply safety of the vehicle controller, the vehicle controller is connected to the power supply to form a power supply circuit, and a VCU fuse is installed on the power supply circuit of the vehicle controller.

[0011] Regarding the control method of the signal end of the emergency steering relay, the signal end of the emergency steering relay is electrically connected to the vehicle controller.

[0012] In summary, the beneficial effect of the utility model is that when the engine suddenly stalls and the steering hydraulic pump driven by the engine fails, the emergency steering system intervenes and supplies oil to the steering oil circuit through the electric hydraulic pump, thereby ensuring the driving safety of the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a circuit diagram of the utility model.

[0014] In the figure: electronic controller 1, ECU fuse 2, CAN bus 3, vehicle controller 4, emergency steering switch 5, VCU fuse 6, hydraulic oil pump fuse 7, power supply 8, emergency steering relay 9, electric hydraulic oil pump 10. DETAILED DESCRIPTION

[0015] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0016] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0017] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0018] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0019] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0020] A control circuit for emergency steering of a loader includes a power supply 8 and a vehicle controller 4, and also includes an electric hydraulic oil pump 10 installed on the steering oil circuit. An emergency steering relay 9 for controlling the on-off of the circuit is installed on the power supply circuit of the electric hydraulic oil pump 10. The control end of the emergency steering relay 9 is electrically connected to the vehicle controller 4. It also includes an emergency steering switch 5 for controlling the emergency steering relay 9. The emergency steering switch 5 is electrically connected to the vehicle controller 4. It also includes an electronic controller 1 for controlling the emergency steering relay 9 when the engine is turned off. Figure 1 When the driver actively presses the emergency steering switch 5, the control relay signal end circuit is connected, the control relay switch end is closed, and the electric hydraulic pump is powered on to supply oil to the steering oil circuit; when the engine suddenly stalls, the electronic controller 1 sends a speed message through the bus 3. When the vehicle controller 4 collects the engine speed from the bus 3 and it is lower than 500 rpm, the control relay signal end circuit is immediately connected, the control relay switch end is closed, and the electric hydraulic pump is powered on to supply oil to the steering oil circuit. This circuit can intervene in the emergency steering system when the engine suddenly stalls and the engine-driven steering hydraulic pump fails, thereby ensuring the driver's driving safety.

[0021] The electronic controller 1 is connected to the vehicle controller 4 via the CAN bus 3. When the engine suddenly shuts down, the electronic controller 1 sends a speed message via the bus 3. When the vehicle controller 4 collects the engine speed from the bus 3 and finds that it is lower than 500 rpm, it immediately controls the relay signal end circuit to be connected and controls the relay switch end to be closed.

[0022] See attached Figure 1In order to ensure the power supply safety of the electric hydraulic oil pump 10, the electric hydraulic oil pump 10 is connected to the power supply 8 to form a power supply circuit, and a hydraulic oil pump fuse 7 is installed on the power supply circuit of the electric hydraulic oil pump 10. In order to ensure the power supply safety of the electronic controller 1, the electronic controller 1 is connected to the power supply 8 to form a power supply circuit, and an ECU fuse is installed on the power supply circuit of the electronic controller 1. In order to ensure the power supply safety of the vehicle controller 4, the vehicle controller 4 is connected to the power supply 8 to form a power supply circuit, and a VCU fuse is installed on the power supply circuit of the vehicle controller 4. Regarding the control method of the signal end of the emergency steering relay 9, the signal end of the emergency steering relay 9 is electrically connected to the vehicle controller 4.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A control circuit for emergency steering of a loader, comprising a power supply (8) and a vehicle controller (4), characterized in that: The invention also includes an electric hydraulic oil pump (10) installed on the steering oil circuit, an emergency steering relay (9) for controlling the on-off of the electric hydraulic oil pump (10) being installed on the power supply circuit of the electric hydraulic oil pump (10), the control end of the emergency steering relay (9) being electrically connected to the vehicle controller (4), an emergency steering switch (5) for controlling the emergency steering relay (9), the emergency steering switch (5) being electrically connected to the vehicle controller (4), and an electronic controller (1) for controlling the emergency steering relay (9) when the engine is turned off.

2. The control circuit for emergency steering of a loader according to claim 1, characterized in that: The electric hydraulic oil pump (10) is connected to a power supply (8) to form a power supply circuit, and a hydraulic oil pump fuse (7) is installed on the power supply circuit of the electric hydraulic oil pump (10).

3. The control circuit for emergency steering of a loader according to claim 1, characterized in that: The electronic controller (1) is connected to a vehicle controller (4) via a CAN bus (3).

4. The control circuit for emergency steering of a loader according to claim 1, characterized in that: The electronic controller (1) is connected to a power supply (8) to form a power supply circuit, and an ECU fuse (2) is installed on the power supply circuit of the electronic controller (1).

5. The control circuit for emergency steering of a loader according to claim 1, characterized in that: The vehicle controller (4) is connected to a power supply (8) to form a power supply circuit, and a VCU fuse (6) is installed on the power supply circuit of the vehicle controller (4).

6. The control circuit for emergency steering of a loader according to claim 1, characterized in that: The signal end of the emergency steering relay (9) is electrically connected to the vehicle controller (4).

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