Loader bucket and movable arm control circuit
By designing an electronic handle and proximity switch system in the loader and connecting the vehicle controller with the CAN bus, the safety hazards of electromagnet attachment during hydraulic handle operation are solved, achieving higher operating convenience and safety.
Patent Information
- Application Number
- CN202420651069.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-01
AI Technical Summary
The hydraulic handle operation of existing loaders has safety risks, which is prone to affect operation due to electromagnet attachment, which poses inconvenience and safety risks.
A loader bucket and boom control circuit is designed, using electronic handles, vehicle controller and power supply. The maximum lifting height of the boom and the bucket closing state are detected through the high limit proximity switch and the leveling proximity switch. The vehicle controller is connected through the CAN bus, and the electromagnet in the traditional handle is cancelled.
It achieves convenient operation and no hidden dangers of electromagnet attachment, improves safety, and makes operation more intuitive and reliable.
Smart Images
Figure CN222648899U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of engineering machinery, in particular to a loader bucket and boom control circuit. Background Art
[0002] A loader is a type of engineering machinery widely used in earthwork construction. A bucket is provided on the front side of the loader, and the bucket is connected to the loader through a boom and an arm. A boom cylinder for controlling the movement of the arm is installed on the upper part of the boom. In addition, an arm cylinder for controlling the movement of the arm is also installed on the excavator. The arm cylinder is supplied with oil through the arm lifting oil circuit, and the arm lifting and lowering are controlled by the arm cylinder; the movement of the bucket is controlled by the rocker arm cylinder, which is supplied with oil through the bucket retracting oil circuit, and the rocker arm rotation is controlled by the rocker arm cylinder, driving the bucket to complete the retracting and digging actions.
[0003] The disadvantage of the prior art is that the excavator is operated through a handle during its working process. The pilot function of the traditional hydraulic handle requires an electromagnet built into the hydraulic handle. The electromagnet is energized when working. The proximity switch is close to the limit block to generate a signal to cut off the power to the handle electromagnet and return the handle to the center position. In the process of operating the handle, the handle is easily accidentally attracted by the electromagnet, affecting the operation. There is a safety hazard and it needs to be improved. Utility Model Content
[0004] The utility model aims to provide a loader bucket and boom control circuit with high safety in view of the above problems.
[0005] To achieve the above-mentioned purpose, the utility model discloses a loader bucket and boom control circuit, including an electronic handle, a vehicle controller and a power supply, and its structural characteristics are: it also includes a high limit proximity switch for detecting the maximum lifting height of the boom, and a leveling proximity switch for detecting the bucket retracting state, a boom lifting solenoid valve is installed on the boom lifting oil circuit, and a bucket retracting solenoid valve is installed on the bucket retracting oil circuit, the high limit proximity switch and the leveling proximity switch are electrically connected to the vehicle controller, and an oil circuit breaking signal is output to the boom lifting solenoid valve or the bucket retracting solenoid valve through the vehicle controller, and the electronic handle is electrically connected to the vehicle controller, and an oil circuit passage signal is output to the boom lifting solenoid valve and the bucket retracting solenoid valve through the vehicle controller.
[0006] After adopting the above structure, the electromagnet in the traditional handle is eliminated, the operation is convenient, there is no hidden danger of the handle being attracted by the electromagnet, and the safety is high.
[0007] Regarding the installation position of the high limit proximity switch, the high limit proximity switch is installed on the front frame. The high limit proximity switch is located at a position where the boom can be triggered when the boom is lifted to the maximum height.
[0008] Regarding the installation position of the leveling proximity switch, the leveling proximity switch is installed on the bracket of the rocker arm cylinder rod, and the sensor plate of the leveling proximity switch is installed on the rocker arm cylinder rod. When the leveling proximity switch is located in the flat position, the sensor plate triggers the position of the leveling proximity switch.
[0009] Regarding the connection method between the electronic handle and the vehicle controller, the electronic handle is connected to the vehicle controller via the CAN bus.
[0010] Preferably, the electronic handle is equipped with a Hall sensor and a CAN chip, and the Hall sensor detects the position signal of the handle, and the position signal is transmitted to the CAN bus via the CAN chip. The electronic handle has no electromagnet and uses two Hall sensors to detect the position of the handle.
[0011] Regarding the line connection method of the vehicle controller and the proximity switch, the vehicle controller is connected to the power supply to form a power supply circuit, and the high-limit proximity switch and the leveling proximity switch are connected in parallel to the power supply circuit of the vehicle controller.
[0012] In order to ensure the circuit safety of the vehicle controller, a VCU fuse is connected in series on the power supply circuit of the vehicle controller.
[0013] In order to ensure the circuit safety of the electronic handle, the electronic handle is connected to a power supply to form a power supply circuit, and a handle fuse is installed on the power supply circuit.
[0014] Preferably, a self-reset button for controlling the vehicle controller is installed on the electronic handle, and the two ends of the self-reset button are connected to the power supply pin and the ground pin of the vehicle controller. When the self-reset button is pressed, the vehicle controller receives a high-level signal, thereby turning on the limit function of the vehicle controller.
[0015] In summary, the beneficial effects of the utility model are as follows: when the vehicle controller receives the boom raising signal of the electronic handle from the CAN bus, the vehicle controller supplies power to the solenoid valve, opens the boom lifting oil circuit, keeps pressing the self-reset button on the electronic handle, and starts the limit function of the vehicle controller. When the boom rotates and rises around the frame to the high limit proximity switch position, the high limit proximity switch outputs an electrical signal to the vehicle controller. After receiving this signal, the VCU stops supplying power to the boom lifting solenoid valve and closes the boom lifting oil circuit. When the vehicle controller receives the bucket retracting signal of the electronic handle from the CAN bus, the vehicle controller supplies power to the bucket retracting solenoid valve, opens the bucket retracting oil circuit, keeps pressing the self-reset button on the electronic handle, and starts the limit function of the vehicle controller. When the leveling proximity switch on the rocker arm oil cylinder rod senses the induction plate, the leveling proximity switch outputs an electrical signal to the vehicle controller. After receiving this signal, the vehicle controller stops supplying power to the bucket retracting solenoid valve and closes the bucket retracting oil circuit. The electronic handle has no electromagnet and uses two Hall sensors to detect the front, back, left and right positions of the handle. The position signal is transmitted to the CAN bus via the CAN chip. It is easy to operate and there is no risk of the handle being attracted by the electromagnet, so it is highly safe. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the circuit structure of the utility model.
[0017] In the figure: electronic handle 1, self-reset button 2, handle fuse 3, CAN bus 4, high limit proximity switch 5, leveling proximity switch 6, vehicle controller 7, VCU fuse 8, power supply 9, bucket retracting solenoid valve 10, boom lifting solenoid valve 11. DETAILED DESCRIPTION
[0018] 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.
[0019] 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.
[0020] 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.
[0021] 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.
[0022] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.
[0023] A loader bucket and boom control circuit comprises an electronic handle 1, a vehicle controller 7 and a power supply 9, and also comprises a high limit proximity switch 5 for detecting the maximum lifting height of the boom, and a leveling proximity switch 6 for detecting the bucket retracting state. A boom lifting solenoid valve 11 is installed on the boom lifting oil circuit, and a bucket retracting solenoid valve 10 is installed on the bucket retracting oil circuit. The high limit proximity switch 5 and the leveling proximity switch 6 are electrically connected to the vehicle controller 7, and output oil circuit breaking signals to the boom lifting solenoid valve 11 or the bucket retracting solenoid valve 10 through the vehicle controller 7. The electronic handle 1 is electrically connected to the vehicle controller 7, and outputs oil circuit passage signals to the boom lifting solenoid valve 11 and the bucket retracting solenoid valve 10 through the vehicle controller 7.
[0024] After adopting the above structure, the electromagnet in the traditional handle is eliminated, the operation is convenient, there is no hidden danger of the handle being attracted by the electromagnet, and the safety is high.
[0025] Regarding the installation position of the high limit proximity switch 5, the high limit proximity switch 5 is installed on the front frame, and the high limit proximity switch 5 is located at a position where the boom can be triggered when the boom is lifted to the maximum height.
[0026] Regarding the installation position of the leveling proximity switch 6, the leveling proximity switch 6 is installed on the bracket of the rocker arm cylinder rod, and the sensor plate of the leveling proximity switch 6 is installed on the rocker arm cylinder rod. When the leveling proximity switch 6 is located in the horizontal position, the sensor plate triggers the position of the leveling proximity switch 6.
[0027] Regarding the connection method between the electronic handle 1 and the vehicle controller 7 , the electronic handle 1 is connected to the vehicle controller 7 via the CAN bus 4 .
[0028] Preferably, the electronic handle 1 is equipped with a Hall sensor and a CAN chip, and the Hall sensor detects the position signal of the handle, which is transmitted to the CAN bus 4 via the CAN chip. The electronic handle 1 has no electromagnet and uses two Hall sensors to detect the position of the handle.
[0029] Regarding the line connection method of the vehicle controller 7 and the proximity switch, the vehicle controller 7 is connected to the power supply 9 to form a power supply circuit, and the high limit proximity switch 5 and the leveling proximity switch 6 are connected in parallel to the power supply circuit of the vehicle controller 7.
[0030] In order to ensure the circuit safety of the vehicle controller 7 , a VCU fuse 8 is connected in series to the power supply circuit of the vehicle controller 7 .
[0031] In order to ensure the circuit safety of the electronic handle 1 , the electronic handle 1 is connected to a power supply 9 to form a power supply circuit, and a handle fuse 3 is installed on the power supply circuit.
[0032] Preferably, the electronic handle 1 is equipped with a self-reset button 2 for controlling the vehicle controller 7, and the two ends of the self-reset button 2 are connected to the power supply pin and the ground pin of the vehicle controller 7. When the self-reset button 2 is pressed, the vehicle controller 7 receives a high-level signal, thereby turning on the limit function of the vehicle controller 7.
[0033] 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 loader bucket and boom control circuit, comprising an electronic handle (1), a vehicle controller (7) and a power supply (9), characterized in that: The invention also includes a high limit proximity switch (5) for detecting the maximum lifting height of the boom, and a leveling proximity switch (6) for detecting the bucket retracting state. A boom lifting solenoid valve (11) is installed on the boom lifting oil circuit, and a bucket retracting solenoid valve (10) is installed on the bucket retracting oil circuit. The high limit proximity switch (5) and the leveling proximity switch (6) are electrically connected to the vehicle controller (7), and output an oil circuit breaking signal to the boom lifting solenoid valve (11) or the bucket retracting solenoid valve (10) through the vehicle controller (7). The electronic handle (1) is electrically connected to the vehicle controller (7), and outputs an oil circuit passage signal to the boom lifting solenoid valve (11) and the bucket retracting solenoid valve (10) through the vehicle controller (7).
2. The loader bucket and boom control circuit according to claim 1, characterized in that: The high limit proximity switch (5) is mounted on the front frame, and the high limit proximity switch (5) is located at a position where the boom can be triggered when the boom is raised to a maximum height.
3. The loader bucket and boom control circuit according to claim 1, characterized in that: The leveling proximity switch (6) is mounted on a bracket of the rocker arm oil cylinder rod, and a sensing plate of the leveling proximity switch (6) is mounted on the rocker arm oil cylinder rod. When the leveling proximity switch (6) is located in a level position, the sensing plate triggers the position of the leveling proximity switch (6).
4. The loader bucket and boom control circuit according to claim 1, characterized in that: The electronic handle (1) is connected to a vehicle controller (7) via a CAN bus (4).
5. The loader bucket and boom control circuit according to claim 4, characterized in that: The electronic handle (1) is equipped with a Hall sensor and a CAN chip, and the Hall sensor detects the front, back, left, and right position signals of the handle, and the position signals are transmitted to the CAN bus (4) via the CAN chip.
6. The loader bucket and boom control circuit according to claim 1, characterized in that: The vehicle controller (7) is connected to a power supply (9) to form a power supply circuit, and the high limit proximity switch (5) and the leveling proximity switch (6) are connected in parallel to the power supply circuit of the vehicle controller (7).
7. The loader bucket and boom control circuit according to claim 6, characterized in that: A VCU fuse (8) is connected in series to the power supply circuit of the vehicle controller (7).
8. The loader bucket and boom control circuit according to claim 1, characterized in that: The electronic handle (1) is connected to a power source (9) to form a power supply circuit, and a handle fuse (3) is installed on the power supply circuit.
9. The loader bucket and boom control circuit according to claim 1, characterized in that: The electronic handle (1) is provided with a self-reset button (2) for controlling the vehicle controller (7), and two ends of the self-reset button (2) are connected to a power supply pin and a ground pin of the vehicle controller (7).