Control method for one-touch lifting and one-touch lowering function of electric loader

Abstract

A control method for the one-touch lifting and one-touch lowering function of an electric loader, belonging to the technical field of electric loaders. By means of wake-up of an ECU, a vehicle program first enters an initialization state upon running; the ECU detects whether a pilot joystick is in a central position; when the pilot joystick is in the center position, and the ECU detects that a one-touch lifting button or a one-touch lowering button is pressed, the ECU controls an electrically controlled multi-way valve (100) to perform corresponding actions, so as to control a bucket control cylinder (200) and a boom control cylinder (300) to perform relevant operations, thereby realizing one-touch lifting of a boom and one-touch lowering of a bucket; during execution, when the pilot joystick is not in the central position or an emergency stop button is pressed, the ECU controls the electrically controlled multi-way valve (100) to stop performing relevant actions. By controlling the electrically controlled multi-way valve (100) via the ECU, the one-touch lifting or one-touch lowering of the electric loader are realized, thereby improving the level of electrification and smartness of the electric loader.

Description

A control method for one-key lifting and one-key flattening function of an electric loader TECHNICAL FIELD

[0001] The application belongs to the technical field of electric loaders, and particularly relates to a control method for one-key lifting and one-key flattening function of an electric loader. BACKGROUND

[0002] The loader is a kind of earthwork construction machinery widely used in highway, railway, building, water and electricity, port and mine construction engineering, and is mainly used for shoveling soil, sand, lime and coal and other bulk materials, and can also perform light shoveling operation on ore and hard soil, and can also perform earth pushing, lifting and other material such as wood loading and unloading operation by replacing different auxiliary working devices.

[0003] With the gradual approach of the national "double carbon" strategy, electric construction machinery gradually emerges in the new energy field. The electric loader is a typical representative of electric construction machinery. With the development in recent years, the electric loader technology has gradually iterated, and the electric loader has gradually developed towards automation and intelligence from the previous focus on realizing basic functions. However, the existing electric loader arm lifting and lowering action is still realized by a pilot valve controlling a multi-way valve, and the control mode of the hydraulic system of the electric loader has not been greatly improved compared with the traditional fuel vehicle. The power of the oil pump is changed from the original engine to the installed motor, and the control of the oil circuit is still based on the control of the traditional valve, which is a pure physical control mode. The electrification and automation level of the whole oil circuit control is not high, which seriously restricts the diversification and flexibility of the arm control. SUMMARY

[0004] 1. Technical problem to be solved by the application

[0005] The application aims to solve the problem of low electrification and automation level of the existing hydraulic system control mode of the electric loader.

[0006] 2. Technical scheme

[0007] To achieve the above-mentioned purpose, the technical scheme provided by the application is as follows:

[0008] The control method for one-key lifting and one-key flattening function of the electric loader comprises the following specific steps:

[0009] S1, the vehicle ECU is woken up, and the vehicle program enters variable initialization;

[0010] S2, the vehicle ECU detects whether the pilot handle is in the center position, when the pilot handle is not in the center position, step S3 is executed, and when the pilot handle is in the center position, step S4 is executed;

[0011] S3, the hydraulic system control mode enters the manual mode, executes the corresponding manual operation, and continues to execute step S2;

[0012] S4, the vehicle ECU detects whether the one-key lifting or one-key leveling button is pressed; when the one-key lifting or one-key leveling button is not pressed, step S2 is continued to be executed; when the one-key lifting or one-key leveling button is pressed, step S5 is executed;

[0013] S5, the hydraulic system control mode enters the automatic mode, and executes the corresponding operation;

[0014] S6, the vehicle ECU detects whether the pilot handle is continuously in the center position or the emergency stop button is pressed; when the pilot handle is not in the center position or the emergency stop button is pressed, step S2 is continued to be executed; when the pilot handle is not in the center position or the emergency stop button is not pressed, step S5 is continued to be executed.

[0015] Preferably, in step S2, when the pilot handle is in the center position, the feedback value detected by the ECU is 1; when the pilot handle is not in the center position, the ECU detects that the AD value of the pilot handle in a certain direction exceeds a set threshold value, and the loader hydraulic system control enters the manual mode.

[0016] Preferably, in step S5, when the one-key lifting button is pressed, the hydraulic control system enters the automatic mode, and the executed operation is step S51; when the one-key leveling button is pressed, the hydraulic control system enters the automatic mode, and the executed operation is step S52.

[0017] Preferably, step S51 specifically comprises: the vehicle ECU detects that the one-key lifting button is pressed, the loader ECU controls the boom proportional valve one to execute the corresponding action, the arm moves, the bucket does not move, the gyroscope mounted on the arm feeds back the pitch angle f of the arm to the ECU in real time, the ECU compares the pitch angle f of the arm with the calculated lifting to-position angle, and when the pitch angle f of the arm fed back by the gyroscope is greater than or equal to the calculated lifting to-position angle, the ECU controls the boom proportional valve one to be turned off, and the lifting of the arm of the loader is stopped.

[0018] Preferably, step S52 specifically comprises: the vehicle ECU detects that the one-key leveling button is pressed, the ECU controls the bucket proportional valve one and the bucket proportional valve two to make the bucket move first, when the pitch angle g of the bucket fed back by the gyroscope is greater than or equal to the calculated bucket leveling to-position angle, the ECU controls the bucket proportional valve one and the bucket proportional valve two to be turned off, and the movement of the bucket of the loader is stopped; after the bucket of the loader is leveled to the position, the ECU controls the boom proportional valve two to make the loader execute the lowering action of the arm, and when the pitch angle f of the arm fed back by the gyroscope is less than or equal to the calculated lowering to-position angle of the arm, the ECU controls the boom proportional valve two to be turned off, and the lowering of the arm of the loader is stopped.

[0019] Preferably, the electric loader is provided with a gyroscope installed on the body in the horizontal direction of the chassis, the angle between the body and the horizontal direction is h, the electric loader is provided with a gyroscope installed on the arm, the angle between the arm and the horizontal direction is f, the electric loader is provided with a gyroscope installed on the bucket, the angle between the bucket and the horizontal direction is g, the angle between the arm and the ground is h_Max, the angle between the arm and the ground is h_Min, the angle between the bucket and the ground is f_Max, the arm is raised to the angle h_Max+h, the bucket is lowered to the angle f_Max+h, and the arm is lowered to the angle h_Min+h. The conditions for raising and lowering are as follows:

[0020] Raising condition: f≥h_Max+h;

[0021] Lowering condition: f≤h_Min+h and g≥f_Max+h.

[0022] Preferably, the method is performed by a system comprising an electric control multi-way valve, a bucket control cylinder and an arm control cylinder; the electric control multi-way valve comprises a proportional valve and a main spool connected to the proportional valve through a pipeline, and the vehicle ECU is electrically connected to the proportional valve; the bucket control cylinder and the arm control cylinder are connected to the main spool through a pipeline respectively, and the electric loader is provided with a gyroscope.

[0023] Preferably, the proportional valve comprises a boom proportional valve one, a boom proportional valve two, a bucket proportional valve one and a bucket proportional valve two, the boom proportional valve one and the bucket proportional valve one are connected to the vehicle ECU through an electric circuit, and the boom proportional valve two and the bucket proportional valve two are connected to the vehicle ECU through an electric circuit.

[0024] Preferably, the main spool comprises a boom main spool and a bucket main spool, the port one of the boom main spool is connected to the boom proportional valve one through a pipeline, the port two of the boom main spool is connected to the boom proportional valve two through a pipeline, the port three of the bucket main spool is connected to the bucket proportional valve one through a pipeline, and the port four of the bucket main spool is connected to the bucket proportional valve two through a pipeline.

[0025] Preferably, the rod cavity one end of the bucket control cylinder is connected to the bucket main spool and the rod cavity one end of the bucket control cylinder through a pipeline in sequence.

[0026] Preferably, the rod cavity one end of the arm control cylinder is connected to the boom main spool and the rod cavity one end of the arm control cylinder through a pipeline in sequence, and the arm control cylinder comprises two cylinders, the rod cavity one end of the two cylinders is connected through a pipeline in parallel, and the rod cavity one end of the two cylinders is connected through a pipeline in parallel.

[0027] 3. Advantageous effects

[0028] Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

[0029] The one-key lifting and one-key flattening function control method of the electric loader belongs to the technical field of electric loaders. The whole vehicle program runs first in an initialization state through ECU awakening. The ECU detects whether the pilot handle is in the center position. When the pilot handle is in the center position, the ECU detects that the one-key lifting or one-key flattening button is pressed. The ECU controls the electric control multi-way valve to perform corresponding actions, controls the bucket control oil cylinder and the large arm control oil cylinder to perform related operations, realizes one-key lifting of the large arm and one-key flattening of the bucket, and stops the ECU from controlling the electric control multi-way valve to perform related actions when the pilot handle is not in the center position or the emergency stop button is pressed. The ECU controls the electric control multi-way valve to realize one-key lifting or one-key flattening of the electric loader, and improves the electrification and intelligent level of the electric loader. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is a hydraulic system principle diagram of the one-key lifting and one-key flattening function control system of the electric loader of the application;

[0031] Fig. 2 is a schematic diagram of measuring the angle of the gyroscope installed in the application;

[0032] Fig. 3 is a method flowchart of the application;

[0033] Fig. 4 is a method operation principle diagram of the application.

[0034] Explanation of the reference numerals in the schematic diagram: 100, electric control multi-way valve; 110, proportional valve; 111, boom proportional valve one; 112, boom proportional valve two; 113, bucket proportional valve one; 114, bucket proportional valve two; 120, main valve core; 121, boom main valve core; a, port one; b, port two; 122, bucket main valve core; c, port three; d, port four; 200, bucket control oil cylinder; 300, large arm control oil cylinder. DETAILED DESCRIPTION

[0035] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be combined. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] In the present application, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", etc. are based on the orientations or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to having a specific orientation, or to being constructed and operated in a specific orientation.

[0038] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0039] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0041] Embodiment 1

[0042] Referring to FIGS. 1-2, the one-key lifting and one-key leveling function control system of the electric loader of the embodiment comprises an electric control multi-way valve 100, a bucket control oil cylinder 200 and a boom control oil cylinder 300; the electric control multi-way valve 100 comprises a proportional valve 110 and a main valve core 120 connected with the proportional valve 110 through pipelines, the proportional valve 110 adjusts the flow of the pipeline where the proportional valve 110 is located by receiving instructions from the vehicle ECU, so that the flow of the pipeline where the main valve core 120 is located is changed;

[0043] The bucket control oil cylinder 200 and the boom control oil cylinder 300 are respectively connected with the main valve core 120 through pipelines, the extension and retraction of the bucket control oil cylinder 200 and the boom control oil cylinder 300 are controlled by changing the flow of the pipeline where the main valve core 120 is located, and then the actions of the boom and the bucket of the electric loader are controlled.

[0044] The proportional valve 110 comprises a boom proportional valve one 111, a boom proportional valve two 112, a bucket proportional valve one 113 and a bucket proportional valve two 114, the boom proportional valve one 111 and the bucket proportional valve one 113 are connected with the vehicle ECU through an electric circuit, receive instructions from the vehicle ECU to complete the adjustment of the flow of the proportional valve, the boom proportional valve two 112 and the bucket proportional valve two 114 are connected with the vehicle ECU through an electric circuit, receive instructions from the vehicle ECU to complete the adjustment of the flow of the proportional valve.

[0045] The main valve core 120 comprises a boom main valve core 121 and a bucket main valve core 122, the port one a of the boom main valve core 121 is connected with the boom proportional valve one 111 through a pipeline, the boom proportional valve one 111 receives instructions from the vehicle ECU to adjust the flow of the pipeline where the boom proportional valve one 111 is located, so that the flow of the pipeline where the boom main valve core 121 is located is changed, and the boom is controlled to rise; the port two b of the boom main valve core 121 is connected with the boom proportional valve two 112 through a pipeline, the boom proportional valve two 112 receives instructions from the vehicle ECU to adjust the flow of the pipeline where the boom proportional valve two 112 is located, so that the flow of the pipeline where the boom main valve core 121 is located is changed, and the boom is controlled to descend; the port three c of the bucket main valve core 122 is connected with the bucket proportional valve one 113 through a pipeline, the bucket proportional valve one 113 receives instructions from the vehicle ECU to adjust the flow of the pipeline where the bucket proportional valve one 113 is located, so that the flow of the pipeline where the bucket main valve core 122 is located is changed, and the bucket is controlled to dig; the port four d of the bucket main valve core 122 is connected with the bucket proportional valve two 114 through a pipeline, the bucket proportional valve two 114 receives instructions from the vehicle ECU to adjust the flow of the pipeline where the bucket proportional valve two 114 is located, so that the flow of the pipeline where the bucket main valve core 122 is located is changed, and the bucket is controlled to unload.

[0046] The bucket control oil cylinder 200 is used to control the bucket, the rod cavity one end of the bucket control oil cylinder 200 is connected with the bucket main valve core 122 and the rod cavity one end of the bucket control oil cylinder 200 through pipeline in turn, when the rod cavity oil inlet, the rod cavity oil outlet, the electric loader bucket unloading, when the rod cavity oil inlet, the rod cavity oil outlet, the electric loader bucket unloading.

[0047] The rod cavity one end of the big arm control oil cylinder 300 is connected with the big arm main valve core 121 and the rod cavity one end of the big arm control oil cylinder 300 through pipeline in turn, the big arm control oil cylinder 300 contains two oil cylinders, the rod cavity one end of the two oil cylinders is connected through pipeline in parallel, the rod cavity one end of the two oil cylinders is connected through pipeline in parallel, when the rod cavity oil inlet, the rod cavity oil outlet, the electric loader big arm drops, when the rod cavity oil outlet, the rod cavity oil inlet, the electric loader big arm lifts.

[0048] When the vehicle ECU sends the command of the bucket unloading through the current output pin, the bucket proportional valve two 114 receives the command from the vehicle ECU, adjusts the pipeline flow of the bucket proportional valve two 114, drives the pipeline flow of the bucket main valve core 122 to change, so that the rod cavity one end of the bucket control oil cylinder 200 oil inlet, the rod cavity one end oil outlet, the electric loader bucket unloading, when the vehicle ECU needs to operate the bucket and the big arm, similar to the above operation process.

[0049] The body of the electric loader is installed with a gyroscope along the horizontal direction of the chassis, the angle between the body and the horizontal direction is h, the big arm of the electric loader is installed with a gyroscope, the installation angle of the gyroscope is adjusted so that it can feedback the angle between the big arm and the horizontal direction, the angle is f, the bucket of the electric loader is installed with a gyroscope, the installation angle of the gyroscope is adjusted so that it can feedback the angle between the bucket and the horizontal direction, the angle is g, the above three angles are along the horizontal direction, counterclockwise is positive, clockwise is negative, assuming that the maximum angle between the big arm and the ground is represented by h_Max, the minimum angle between the big arm and the ground is represented by h_Min, the maximum angle between the bucket and the ground is represented by f_Max, then the big arm lifting to the angle is h_Max+h, the bucket to the angle is f_Max+h, the big arm to the angle is h_Min+h. Then the lifting to the angle and the lowering to the angle conditions are as follows:

[0050] The lifting to the angle condition f≥h_Max+h;

[0051] The lowering to the angle condition f≤h_Min+h and g≥f_Max+h.

[0052] Example 2

[0053] With reference to the accompanying drawings 3-4, the one-key lifting and one-key leveling function control method of the electric loader of the embodiment is implemented by using the control system of the embodiment 1, and specifically

[0054] S1, the whole vehicle ECU is woken up, and the whole vehicle program enters variable initialization;

[0055] S2, the whole vehicle ECU detects whether the pilot handle is in the center position, when the pilot handle is not in the center position, step S3 is executed, and when the pilot handle is in the center position, step S4 is executed;

[0056] S3, the hydraulic system control mode enters the manual mode, corresponding manual operation is executed, and step S2 is continuously executed;

[0057] S4, the whole vehicle ECU detects whether the one-key lifting or one-key leveling button is pressed; when the one-key lifting or one-key leveling button is not pressed, step S2 is continuously executed, and when the one-key lifting or one-key leveling button is pressed, step S5 is executed;

[0058] S5, the hydraulic system control mode enters the automatic mode, and corresponding operation is executed;

[0059] S6, the whole vehicle ECU detects whether the pilot handle continues to be in the center position or the emergency stop button is pressed, when the pilot handle is not in the center position or the emergency stop button is pressed, step S2 is continuously executed, and when the pilot handle is not in the center position or the emergency stop button is not pressed, step S5 is continuously executed.

[0060] In the step S2, when the pilot handle is in the center position, the feedback value detected by the ECU is 1, and when the pilot handle is not in the center position, the ECU detects that the AD value of the pilot handle in a certain direction exceeds a set threshold value, and the loader hydraulic system control enters the manual mode.

[0061] In the step S5, when the one-key lifting button is pressed, the hydraulic control system enters the automatic mode, and the operation executed is step S51, and when the one-key leveling button is pressed, the hydraulic control system enters the automatic mode, and the operation executed is step S52.

[0062] The step S51 specifically includes that the whole vehicle ECU detects that the one-key lifting button is pressed, the loader ECU controls the boom proportional valve one 111 to execute corresponding actions, the arm moves, the bucket does not move, and the gyroscope on the arm feeds back the pitch angle f of the arm to the ECU in real time, the ECU compares the pitch angle f of the arm with the calculated lifting to-position angle, when the pitch angle f fed back by the gyroscope on the arm is greater than or equal to the calculated lifting to-position angle, the ECU controls the boom proportional valve one 111 to be turned off, and the lifting of the loader arm is stopped.

[0063] The step S52 is specifically: the whole vehicle ECU detects that the one-key flattening button is pressed, the ECU controls the bucket proportional valve one 113 and the bucket proportional valve two 114 to make the bucket act first, the gyroscope on the bucket feeds back the pitch angle g, and the pitch angle g is greater than or equal to the ECU calculated bucket flattening to the in-place angle, the ECU will control the bucket proportional valve one 113 and the bucket proportional valve two 114 to hang up, and the loader bucket stops acting; after the loader bucket is flattened to the in-place position, the ECU controls the boom proportional valve two 112 to make the loader perform the boom lowering action, and when the pitch angle f fed back by the gyroscope on the boom is less than or equal to the ECU calculated boom lowering to the in-place angle, the ECU controls the boom proportional valve two 112 to be closed, and the loader boom lowering stops.

[0064] The above-described embodiments only express certain implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application; it should be pointed out that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application; therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method of controlling a one-key lift and one-key level function of an electric loader, characterized by, The method specifically comprises the following steps: S1, the whole vehicle ECU wakes up, and the whole vehicle program enters variable initialization; S2, the whole vehicle ECU detects whether the pilot handle is in the center position, when the pilot handle is not in the center position, step S3 is executed, and when the pilot handle is in the center position, step S4 is executed; S3, the hydraulic system control mode enters the manual mode, corresponding manual operation is executed, and step S2 is continuously executed; S4, the whole vehicle ECU detects whether the one-key lifting or one-key flattening button is pressed; when the one-key lifting or one-key flattening button is not pressed, step S2 is continuously executed, and when the one-key lifting or one-key flattening button is pressed, step S5 is executed; S5, the hydraulic system control mode enters the automatic mode, and corresponding operation is executed; S6, the whole vehicle ECU detects whether the pilot handle continues to be in the center position or the emergency stop button is pressed; when the pilot handle is not in the center position or the emergency stop button is pressed, step S2 is continuously executed, and when the pilot handle is not in the center position or the emergency stop button is not pressed, step S5 is continuously executed.

2. A method of controlling a one-touch lift and one-touch lower function of a motorized loader as defined in claim 1, characterized by: In the step S2, when the pilot handle is in the center position, the feedback value detected by the ECU is 1, when the pilot handle is not in the center position, the ECU detects that the AD value of the pilot handle in a certain direction exceeds a set threshold value, and the loader hydraulic system control enters the manual mode.

3. The method of claim 1, wherein: In the step S5, when the one-key lifting button is pressed, the hydraulic control system enters the automatic mode, and the operation executed is step S51; when the one-key flattening button is pressed, the hydraulic control system enters the automatic mode, and the operation executed is step S52.

4. A method of controlling a one-key lift and one-key lower function of an electric loader according to claim 3, characterized in that: The step S51 specifically comprises the following steps: the whole vehicle ECU detects that the one-key lifting button is pressed, the loader ECU controls the boom proportional valve one (111) to execute corresponding actions, the arm moves, the bucket does not move, the gyroscope on the arm feeds back the pitch angle f of the arm to the ECU in real time, the ECU compares the pitch angle f of the arm with the lifting to-position angle calculated by the ECU, when the pitch angle f fed back by the gyroscope on the arm is greater than or equal to the lifting to-position angle calculated by the ECU, the ECU controls the boom proportional valve one (111) to be closed, and the lifting of the arm of the loader is stopped.

5. The method of claim 3, wherein: The step S52 specifically comprises the following steps: the whole vehicle ECU detects that the one-key flattening button is pressed, the ECU controls the bucket proportional valve one (113) and the bucket proportional valve two (114) to make the bucket move first, when the pitch angle g fed back by the gyroscope on the bucket is greater than or equal to the bucket flattening to-position angle calculated by the ECU, the ECU controls the bucket proportional valve one (113) and the bucket proportional valve two (114) to be closed, and the movement of the bucket of the loader is stopped; after the bucket of the loader is flattened to the position, the ECU controls the boom proportional valve two (112) to make the loader execute the arm lowering action, when the pitch angle f fed back by the gyroscope on the arm is less than or equal to the arm lowering to-position angle calculated by the ECU, the ECU controls the boom proportional valve two (112) to be closed, and the lowering of the arm of the loader is stopped.

6. A method of controlling a one-key lift and one-key lower function of an electric loader according to claim 4 or 5, characterized in that: The electric loader is provided with a gyroscope installed horizontally along the chassis, the angle between the chassis and the horizontal direction is h, a gyroscope is installed on the arm of the electric loader, the angle between the arm and the horizontal direction is f, a gyroscope is installed on the bucket of the electric loader, the angle between the bucket and the horizontal direction is g, counterclockwise is positive and clockwise is negative, the maximum angle between the arm and the ground is h_Max, the minimum angle between the arm and the ground is h_Min, the maximum angle between the bucket and the ground is f_Max, the arm is lifted to the position angle h_Max+h, the bucket is placed to the position angle f_Max+h, and the arm is lowered to the position angle h_Min+h. The conditions for lifting to the position and lowering to the position are as follows: Lifting to the position condition: f≥h_Max+h; Lowering to the position condition: f≤h_Min+h and g≥f_Max+h.

7. A method of controlling a one-key lift and one-key lower function of an electric loader according to any one of claims 1-5, characterized in that: The method is performed by using the following system: The system comprises an electric control multi-way valve (100), a bucket control oil cylinder (200) and an arm control oil cylinder (300), the electric control multi-way valve (100) comprises a proportional valve (110) and a main valve core (120) connected with the proportional valve (110) through a pipeline, the whole vehicle ECU is electrically connected with the proportional valve (110), the bucket control oil cylinder (200) and the arm control oil cylinder (300) are connected with the main valve core (120) through a pipeline, and a gyroscope is installed on the electric loader.

8. A method of controlling a one-key lift and one-key lower function of a motorized loader as defined in claim 7, characterized by: The proportional valve (110) comprises an arm proportional valve one (111), an arm proportional valve two (112), a bucket proportional valve one (113) and a bucket proportional valve two (114), the arm proportional valve one (111) and the bucket proportional valve one (113) are connected with the whole vehicle ECU through a circuit, and the arm proportional valve two (112) and the bucket proportional valve two (114) are connected with the whole vehicle ECU through a circuit.

9. A method of controlling a one-key lift and one-key lower function of a motorized loader as defined in claim 8, characterized by: The main valve core (120) comprises an arm main valve core (121) and a bucket main valve core (122), the port one (a) of the arm main valve core (121) is connected with the arm proportional valve one (111) through a pipeline, the port two (b) of the arm main valve core (121) is connected with the arm proportional valve two (112) through a pipeline, the port three (c) of the bucket main valve core (122) is connected with the bucket proportional valve one (113) through a pipeline, and the port four (d) of the bucket main valve core (122) is connected with the bucket proportional valve two (114) through a pipeline.

10. A method of controlling a one-key lift and one-key lower function of a motorized loader as defined in claim 9, characterized by: The rod cavity one end of the bucket control oil cylinder (200) is connected with the rod cavity one end of the bucket control oil cylinder (200) and the bucket main valve core (122) in sequence through a pipeline.

11. A method of controlling a one-key lift and one-key lower function of a motorized loader as defined in claim 10, characterized by: The rod cavity one end of the arm control oil cylinder (300) is connected with the rod cavity one end of the arm control oil cylinder (300) and the arm main valve core (121) in sequence through a pipeline, the arm control oil cylinder (300) comprises two oil cylinders, the rod cavity one ends of the two oil cylinders are connected in parallel through a pipeline, and the rod cavity one ends of the two oil cylinders are connected in parallel through a pipeline.