Work machine, attachment quick-change hydraulic control system and control method

Abstract

The present application relates to the technical field of engineering machinery, and particularly relates to a working machine, a tool quick-change hydraulic control system and a control method. The control method of the tool quick-change hydraulic control system comprises the following steps: after a first instruction is obtained, a quick-change cut-off valve is powered on to establish system oil pressure, a quick-change pressure reducing valve is powered on to adjust the working pressure of the tool quick-change hydraulic control system, and a quick-change directional valve is powered on to adjust the oil path direction to make a clamp loosen a tool; after a second instruction is obtained, the quick-change directional valve is powered off, the oil path direction is reset to make the clamp clamp the tool; and after a preset time, the quick-change cut-off valve and the quick-change pressure reducing valve are both powered off. According to the control method of the tool quick-change hydraulic control system, the quick-change cut-off valve, the quick-change pressure reducing valve and the quick-change directional valve are arranged on the tool quick-change hydraulic control system, so that automatic replacement of the tool can be realized. Moreover, after the second instruction is obtained, the quick-change cut-off valve and the quick-change pressure reducing valve are powered off after the preset time, so that the tool clamping and locking function can be realized.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a quick-change hydraulic control system and control method for operating machinery and attachments. Background Technology

[0002] In today's excavator market, excavators are required to handle an increasing number of working conditions, and the application of various attachments is becoming more frequent. In addition to installing buckets, excavators can also be equipped with attachments such as breakers, hydraulic shears, thumb clamps, and grapples to meet the needs of installing multi-functional attachments.

[0003] Most excavator quick-change devices operate with a single pump. They typically utilize the pressure buildup and overflow of the bucket to generate high pressure, which is then introduced into the large chamber of the quick-change cylinder to clamp the attachment. When the reversing solenoid valve is operated, the high-pressure hydraulic oil flows into the small chamber of the quick-change cylinder, releasing the attachment. This type of quick-change device has the following drawbacks: the working pressure is single and non-adjustable. This is mainly because quick-change operation requires bucket digging to build up pressure and overflow, meaning the working pressure is the system's overflow pressure, typically 340–380 Bar. Furthermore, the entire quick-change process requires operating the bucket digging action; the bucket digging operation cannot be interrupted during the attachment's clamping and loosening, making operation cumbersome and difficult to control. Summary of the Invention

[0004] This invention provides a hydraulic control system and control method for quick-change attachments in operating machinery, which solves the defects of the prior art in that the attachment replacement process is cumbersome and the pressure of the quick-change oil circuit is not adjustable. It realizes automatic attachment replacement, adjusts the pressure of the quick-change oil circuit, and can also realize the flow of high-pressure hydraulic oil to the large chamber of the oil cylinder, that is, realize the attachment clamping and locking function.

[0005] This invention provides a control method for a quick-change hydraulic control system for attachments, comprising:

[0006] Switch the attachment quick-change hydraulic control system to quick-change mode;

[0007] After receiving the first instruction, the quick-change shut-off valve is energized to establish system oil pressure, the quick-change pressure reducing valve is energized to adjust the working pressure of the quick-change hydraulic control system of the attachment, and the quick-change directional valve is energized to adjust the oil circuit direction so that the clamp releases the attachment.

[0008] After receiving the second instruction, the quick-change directional valve is de-energized, and the oil circuit direction is reset so that the clamp clamps the attachment; after a preset time, both the quick-change shut-off valve and the quick-change pressure reducing valve are de-energized.

[0009] According to the control method of the attachment quick-change hydraulic control system provided by the present invention, before the steps of obtaining the first instruction, energizing the quick-change shut-off valve to establish system oil pressure, energizing the quick-change pressure reducing valve to adjust the working pressure of the attachment quick-change hydraulic control system, and energizing the quick-change directional valve to adjust the oil circuit direction so that the clamp releases the attachment, the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system are obtained first.

[0010] According to the control method of the attachment quick-change hydraulic control system provided by the present invention, in the step of first obtaining the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system, the pressure unlocking information of the attachment quick-change hydraulic control system is obtained first, and then the direction unlocking information is obtained.

[0011] According to the control method of the attachment quick-change hydraulic control system provided by the present invention, after the step of first obtaining the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system, the working pressure of the attachment quick-change hydraulic control system is set.

[0012] According to the control method of the attachment quick-change hydraulic control system provided by the present invention, in the steps of obtaining the first instruction, the quick-change shut-off valve is energized to establish the system oil pressure, the quick-change pressure reducing valve is energized to adjust the working pressure of the attachment quick-change hydraulic control system, and the quick-change directional valve is energized to adjust the oil circuit direction so that the clamp releases the attachment, the quick-change shut-off valve, the quick-change pressure reducing valve and the quick-change directional valve are energized sequentially.

[0013] According to the control method of the attachment quick-change hydraulic control system provided by the present invention, after obtaining the second command, the quick-change directional valve is de-energized, the oil circuit direction is reset, and the clamp clamps the attachment. After a preset time, the quick-change shut-off valve and the quick-change pressure reducing valve are both de-energized, and the attachment quick-change hydraulic control system exits the quick-change mode.

[0014] According to the control method of the attachment quick-change hydraulic control system provided by the present invention, when the attachment quick-change hydraulic control system switches to quick-change mode, an alarm is activated; when the attachment quick-change hydraulic control system exits the quick-change mode, the alarm is deactivated.

[0015] According to the control method of the quick-change hydraulic control system for attachments provided by the present invention, the preset time is 3s-8s.

[0016] According to the control method of the quick-change hydraulic control system for attachments provided by the present invention, the first instruction is that the handle button is triggered, and the second instruction is to cancel the triggering action of the handle button.

[0017] The present invention also provides a quick-change hydraulic control system for attachments, comprising:

[0018] The information acquisition module is used to collect mode information of the attachment quick-change hydraulic control system;

[0019] The sending module is used to send the first and second instructions.

[0020] The receiving module is used to receive the first instruction and the second instruction, and to control the quick-change shut-off valve, quick-change pressure reducing valve and quick-change directional valve to be energized or de-energized.

[0021] The present invention also provides a working machine that implements the control method of the attachment quick-change hydraulic control system described above, and the working machine includes:

[0022] The quick-change oil circuit is equipped with a quick-change shut-off valve, a quick-change pressure reducing valve, and a quick-change directional valve.

[0023] The hydraulic cylinder is connected to the quick-change hydraulic circuit. The hydraulic cylinder includes a large chamber and a small chamber. The quick-change directional valve is used to control the flow of hydraulic fluid into or out of the large chamber and the small chamber.

[0024] The main pump is used to pump oil into the quick-change oil circuit.

[0025] The present invention provides a control method for a quick-change hydraulic control system for attachments. By setting a quick-change directional valve, a quick-change shut-off valve, and a quick-change pressure reducing valve on the quick-change hydraulic control system, automatic attachment changing can be realized. After receiving a second command, the quick-change directional valve is de-energized, and after a preset time, the quick-change shut-off valve and the quick-change pressure reducing valve are de-energized. This allows high-pressure hydraulic oil to flow to the large chamber of the cylinder, thus realizing the attachment clamping and locking function. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the attachment quick-change hydraulic control system provided by the present invention;

[0028] Figure 2 This is a flowchart of the control method for the attachment quick-change hydraulic control system provided by the present invention;

[0029] Figure 3 This is a flowchart of the control method for the attachment quick-change hydraulic control system provided by the present invention.

[0030] Figure label:

[0031] 110. Quick-change oil circuit; 111. Quick-change shut-off valve; 112. Quick-change pressure reducing valve; 113. Quick-change directional valve;

[0032] 120. Hydraulic cylinder; 121. Large chamber; 122. Small chamber;

[0033] 130. Main pump; 140. Oil tank. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] The following is combined Figures 1-3 This invention describes the operating machinery, attachment quick-change hydraulic control system, and control method. It should be noted that the operating machinery can be an excavator, and the excavator's attachments include buckets, hydraulic breakers, hydraulic shears, thumb clamps, grapples, etc., to enable the excavator to meet multi-functional needs. For example, when the attachment on the excavator is a bucket, the excavator can be used to scoop and transport materials; when the attachment on the excavator is a grapple, the excavator can be used to dig or grab materials; when the attachment on the excavator is a hydraulic breaker, the excavator can control the hydraulic breaker to break hard materials or hard rock formations, etc. Since different attachments require different working pressures, the working pressure of the attachment quick-change hydraulic control system needs to be adjusted when the excavator needs to change attachments.

[0036] See Figure 3 As shown, the control method of the attachment quick-change hydraulic control system according to an embodiment of the present invention includes:

[0037] S10: Switch the attachment quick-change hydraulic control system to quick-change mode. The operator of the work machinery can switch modes according to the working conditions. In quick-change mode, the operator can change the attachments of the work machinery. Quick-change mode is the mode selected when quick-change attachments are in operation. This mode can be defined by the display screen and then transmitted to the controller via CAN communication. Finally, the controller recognizes the mode trigger and performs the corresponding subsequent actions. During operation, the quick-change mode is selected by the operator. For example, when it is necessary to change the front attachment of the excavator to a quick-change attachment, the operator can first select the excavator's working mode as quick-change mode and then perform the attachment change operation. Specifically, when the excavator needs to change attachments, the attachment quick-change hydraulic control system can be switched to quick-change mode; when attachments do not need to be changed, the attachment quick-change hydraulic control system can be deactivated from quick-change mode and switched to another mode. In other words, attachments of the work machinery can be changed in quick-change mode.

[0038] S20: After receiving the first command, the quick-change shut-off valve 111 is energized to establish system oil pressure. See also Figure 1 As shown, a quick-change shut-off valve 111 is provided in the oil circuit of the attachment quick-change hydraulic control system. It should be noted that when the quick-change shut-off valve 111 is energized, the attachment quick-change hydraulic control system can establish system oil pressure, which can be 340 Bar-380 Bar. For example, according to an embodiment of the present invention, the system oil pressure of the attachment quick-change hydraulic control system can be 350 Bar. In some embodiments, the first command is a command issued via an operation button. For example, the driver can press the trigger button on the handle; that is, when the trigger button on the handle is pressed, the first command is issued; when the trigger button on the handle is released, the second command is issued. In other words, the action of pressing or triggering the trigger button can be understood as the action of issuing the first command, that is, when the trigger button on the handle is triggered or pressed, the first command is issued; the action of releasing the trigger button can be understood as the action of issuing the second command, that is, when the trigger button is released, the second command is issued.

[0039] The quick-change pressure reducing valve 112 is energized to adjust the working pressure of the attachment quick-change hydraulic control system. Since different attachments require different working pressures, the working pressure of the attachment quick-change hydraulic control system needs to be adjusted when the excavator needs to change attachments. The quick-change pressure reducing valve 112 can adjust the working pressure of the attachment quick-change hydraulic control system. See also... Figure 1 As shown, the hydraulic control system for quick attachment change is equipped with a quick-change pressure reducing valve 112. By setting the quick-change pressure reducing valve 112, the system oil pressure can be adjusted to the working oil pressure of the attachment. Thus, after the attachment is replaced, the system oil pressure can meet the working requirements of the attachment.

[0040] In some embodiments, see Figure 2 As shown, when the trigger button on the handle is activated, the operator can set the working pressure on the controller, display, or control panel. This setting allows the quick-change pressure reducing valve 112 to reach the set working pressure when energized. For example, in the attachment quick-change hydraulic control system, the operator can set the working pressure range to 50 Bar-220 Bar, meaning the pressure adjustment range of the quick-change pressure reducing valve 112 can be 50 Bar-220 Bar.

[0041] It should be noted that there are no specific restrictions on the triggering method of the "trigger button on the controller". For example, the triggering method can be a long press of the button, multiple consecutive presses, or touch of the screen.

[0042] See Figure 1 As shown, the hydraulic control system for quick-change attachments includes a quick-change directional valve 113 on its oil circuit. This valve adjusts the direction of oil flow, thereby controlling the clamping or releasing action of the gripper holding the attachment. When energized, the quick-change directional valve 113 adjusts the oil flow direction to release the attachment. For example, when the valve adjusts the oil flow in a first direction, the gripper clamps the attachment; when it adjusts the flow in a second direction (opposite to the first), the gripper releases the attachment. When de-energized, the valve reverses to the first direction, and the gripper clamps the attachment. When energized, the valve reverses to the second direction, and the gripper releases the attachment.

[0043] For example, when the trigger button on the handle is pressed, both the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are energized, and the attachment quick-change hydraulic control system is in a high-pressure state. At the same time, the quick-change directional valve 113 is energized, and the high-pressure hydraulic oil flows to the small chamber 122 of the cylinder 120, thereby unlocking and releasing the attachment. When the quick-change directional valve 113 is de-energized, the high-pressure hydraulic oil flows to the large chamber 121 of the cylinder 120, thereby clamping the attachment.

[0044] S30: After receiving the second instruction, the quick-change directional valve 113 is de-energized, the oil circuit direction is reset (i.e., the oil circuit direction returns to the first direction), causing the clamp to clamp the attachment. After a preset time, both the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are de-energized. In some embodiments, the preset time can be 3s-8s, preferably 5s. This allows sufficient time for oil backflow.

[0045] It should be noted that after the quick-change directional valve 113 is de-energized, the oil circuit direction can be restored to the first direction, at which point the clamp will clamp the attachment. To ensure that the clamp completes the clamping action and locks the clamp in the clamped state, in some examples, after the quick-change directional valve 113 is de-energized, the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are de-energized after a preset time. In this way, high-pressure hydraulic oil flows to the large chamber 121 of the cylinder 120, thus achieving the attachment clamping and locking function. For example, after the attachment is replaced, the trigger button on the handle is released, the quick-change directional valve 113 is de-energized, and simultaneously, after 5 seconds (i.e., the preset time is 5 seconds) after the quick-change directional valve 113 is de-energized, the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are de-energized. Within 5 seconds after the quick-change directional valve 113 is de-energized, high-pressure hydraulic oil flows to the large chamber 121 of the cylinder 120, thus achieving the attachment clamping and locking function.

[0046] According to the control method of the attachment quick-change hydraulic control system of the present invention, by setting a quick-change directional valve 113, a quick-change shut-off valve 111 and a quick-change pressure reducing valve 112 on the attachment quick-change hydraulic control system, the attachment can be automatically changed. After receiving the second command, the quick-change directional valve 113 is de-energized, and after a preset time, the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are de-energized. In this way, high-pressure hydraulic oil can flow to the large chamber 121 of the cylinder 120, that is, the attachment clamping and locking function is realized.

[0047] According to some embodiments of the present invention, before the steps of obtaining the first instruction, energizing the quick-change shut-off valve 111 to establish system oil pressure, energizing the quick-change pressure reducing valve 112 to adjust the working pressure of the attachment quick-change hydraulic control system, and energizing the quick-change directional valve 113 to adjust the oil circuit direction to release the attachment, i.e., before step S20, the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system are first obtained. This allows for safe attachment replacement.

[0048] In some embodiments, step S20 can proceed when it is determined that both the pressure unlock key and the direction unlock key are triggered. When at least one of the pressure unlock key and the direction unlock key is not triggered, the attachment quick-change hydraulic control system cannot proceed to step S20. It is understood that only when both the pressure unlock key and the direction unlock key are triggered, and after receiving the first instruction, is the quick-change shut-off valve 111 energized to establish system oil pressure, the quick-change pressure reducing valve 112 energized to adjust the working pressure of the attachment quick-change hydraulic control system, and the quick-change directional valve 113 energized to adjust the oil circuit direction to release the attachment.

[0049] In some embodiments, see Figure 2As shown, after the attachment quick-change hydraulic control system switches to quick-change mode, in the step of first obtaining the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system, it first determines whether the pressure unlocking key is triggered, and then determines whether the direction unlocking key is triggered.

[0050] In some embodiments, see Figure 2 As shown, after obtaining the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system, the working pressure of the attachment quick-change hydraulic control system is set. This ensures that attachment changes can be performed smoothly.

[0051] According to some embodiments of the present invention, in the steps of obtaining the first instruction, the quick-change shut-off valve 111 is energized to establish system oil pressure, the quick-change pressure reducing valve 112 is energized to adjust the working pressure of the attachment quick-change hydraulic control system, and the quick-change directional valve 113 is energized to adjust the oil circuit direction to release the clamp from the attachment, that is, in step S20, the quick-change shut-off valve 111, the quick-change pressure reducing valve 112, and the quick-change directional valve 113 are energized sequentially. This can improve the logical control rationality of the control method. In some embodiments, the quick-change shut-off valve 111, the quick-change pressure reducing valve 112, and the quick-change directional valve 113 can all be solenoid valves.

[0052] According to some embodiments of the present invention, after receiving the second command, the quick-change directional valve 113 is de-energized, the oil circuit direction is reset, and the clamp clamps the attachment. After a preset time, and following the step where both the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are de-energized, the attachment quick-change hydraulic control system exits the quick-change mode. Thus, the excavator can enter other modes and perform other operations.

[0053] To provide a notification function when changing attachments on the excavator, according to some embodiments of the present invention, an alarm is activated when the attachment quick-change hydraulic control system switches to quick-change mode; and the alarm is deactivated when the attachment quick-change hydraulic control system exits quick-change mode. In other words, the alarm sounds when the attachment quick-change hydraulic control system is in quick-change mode. The form of the alarm is not specifically limited here; for example, the alarm can be an audible alarm or a visual alarm.

[0054] According to an embodiment of the present invention, a quick-change hydraulic control system for attachments includes: an information acquisition module, a sending module, and a receiving module. The information acquisition module is used to acquire mode information of the quick-change hydraulic control system; the sending module is used to issue a first command and a second command; the receiving module is used to receive the first command and the second command, and to control the quick-change shut-off valve 111, the quick-change pressure reducing valve 112, and the quick-change directional valve 113 to be energized or de-energized. It should be noted that after the receiving module receives the first command, the quick-change shut-off valve 111 is energized to establish system oil pressure, the quick-change pressure reducing valve 112 is energized to adjust the working pressure of the quick-change hydraulic control system, and the quick-change directional valve 113 can adjust the direction of oil flow, thereby controlling the clamping action of the attachment.

[0055] After receiving the second command, the quick-change directional valve 113 is de-energized, and the quick-change shut-off valve 111 and quick-change pressure reducing valve 112 are de-energized again after 5 seconds. Thus, within 5 seconds after the quick-change directional valve 113 is de-energized, high-pressure hydraulic oil flows to the large chamber 121 of the cylinder 120, thereby realizing the attachment clamping and locking function.

[0056] According to the attachment quick-change hydraulic control system of the present invention, by setting a quick-change directional valve 113, a quick-change shut-off valve 111, and a quick-change pressure reducing valve 112 on the attachment quick-change hydraulic control system, the attachment can be automatically changed. Moreover, after receiving the second command, the quick-change directional valve 113 is de-energized, and after a preset time, the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are de-energized. In this way, high-pressure hydraulic oil can flow to the large chamber 121 of the cylinder 120, that is, the attachment clamping and locking function is realized.

[0057] According to embodiments of the present invention, the working machinery implements the control method of the attachment quick-change hydraulic control system described above. It should be noted that the working machinery can be an excavator, and the excavator's attachments include buckets, breakers, hydraulic shears, thumb clamps, grapples, etc., to enable the excavator to meet multi-functional needs. For example, when the attachment on the excavator is a bucket, the excavator can be used to shovel and transport materials; when the attachment on the excavator is a grapple, the excavator can be used to dig or grab materials; when the attachment on the excavator is a breaker, the excavator can be used to break hard materials or rock formations, etc. Since different attachments require different working pressures, the working pressure of the attachment quick-change hydraulic control system needs to be adjusted when the excavator needs to change attachments.

[0058] See Figure 1As shown, the operating machinery may include: a quick-change hydraulic circuit 110, a hydraulic cylinder 120, a main pump 130, and an oil tank 140. The quick-change hydraulic circuit 110 is equipped with a quick-change shut-off valve 111, a quick-change pressure reducing valve 112, and a quick-change directional valve 113. The hydraulic cylinder 120 is connected to the quick-change hydraulic circuit 110 and includes a large chamber 121 and a small chamber 122. The quick-change directional valve 113 is used to control the flow of oil into or out of the large chamber 121 and the small chamber 122. For example, after the quick-change directional valve 113 is de-energized, to ensure the clamping action is completed, after a preset time, the quick-change shut-off valve 111 and quick-change pressure reducing valve 112 are also de-energized. At this time, the oil circuit direction is the first direction, realizing the flow of high-pressure hydraulic oil to the large chamber 121 of the cylinder 120, thus realizing the attachment clamping and locking function. Alternatively, when the trigger button on the handle is pressed, both the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are energized, the attachment quick-change hydraulic control system is in a high-pressure state, the quick-change directional valve 113 is energized, and the oil flows in the second direction. Simultaneously, the high-pressure hydraulic oil flows to the small chamber 122 of the cylinder 120, realizing the attachment unlocking and releasing function. The main pump 130 is used to pump oil into the quick-change oil circuit 110, and the oil tank 140 is used to collect the oil in the quick-change oil circuit 110.

[0059] According to the embodiments of the present invention, the working machinery can realize automatic attachment changing by setting a quick-change directional valve 113, a quick-change shut-off valve 111, and a quick-change pressure reducing valve 112 on the attachment quick-change hydraulic control system. After receiving the second command, the quick-change directional valve 113 is de-energized, and after a preset time, the quick-change shut-off valve 111 and the quick-change pressure reducing valve 112 are de-energized. This allows high-pressure hydraulic oil to flow to the large chamber 121 of the cylinder 120, thus realizing the attachment clamping and locking function.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a quick-change hydraulic control system for attachments, characterized in that, include: Switch the attachment quick-change hydraulic control system to quick-change mode; After receiving the first instruction, the quick-change shut-off valve is energized to establish system oil pressure, the quick-change pressure reducing valve is energized to adjust the working pressure of the quick-change hydraulic control system of the attachment, and the quick-change directional valve is energized to adjust the oil circuit direction so that the clamp releases the attachment. After receiving the second instruction, the quick-change directional valve is de-energized, the oil circuit direction is reset, and the clamp clamps the attachment; after a preset time, both the quick-change shut-off valve and the quick-change pressure reducing valve are de-energized. In the steps of receiving the first instruction, the quick-change shut-off valve is energized to establish system oil pressure, the quick-change pressure reducing valve is energized to adjust the working pressure of the attachment quick-change hydraulic control system, and the quick-change directional valve is energized to adjust the oil circuit direction to release the clamp from the attachment, the quick-change shut-off valve, the quick-change pressure reducing valve, and the quick-change directional valve are energized sequentially.

2. The control method of the attachment quick-change hydraulic control system according to claim 1, characterized in that, Before the steps of obtaining the first instruction, energizing the quick-change shut-off valve to establish system oil pressure, energizing the quick-change pressure reducing valve to adjust the working pressure of the attachment quick-change hydraulic control system, and energizing the quick-change directional valve to adjust the oil circuit direction so that the clamp releases the attachment, the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system are obtained first.

3. The control method of the attachment quick-change hydraulic control system according to claim 2, characterized in that, In the step of first obtaining the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system, the pressure unlocking information of the attachment quick-change hydraulic control system is obtained first, and then the direction unlocking information is obtained.

4. The control method of the attachment quick-change hydraulic control system according to claim 2, characterized in that, After obtaining the pressure unlocking information and direction unlocking information of the attachment quick-change hydraulic control system, the working pressure of the attachment quick-change hydraulic control system is set.

5. The control method of the attachment quick-change hydraulic control system according to claim 1, characterized in that, After receiving the second instruction, the quick-change directional valve is de-energized, the oil circuit direction is reset, and the clamp clamps the attachment. After a preset time, the quick-change shut-off valve and the quick-change pressure reducing valve are both de-energized, and the attachment quick-change hydraulic control system exits the quick-change mode.

6. The control method of the attachment quick-change hydraulic control system according to claim 5, characterized in that, When the attachment quick-change hydraulic control system switches to quick-change mode, the alarm is activated; when the attachment quick-change hydraulic control system exits the quick-change mode, the alarm is deactivated.

7. The control method of the attachment quick-change hydraulic control system according to any one of claims 1 to 6, characterized in that, The preset time is 3s-8s.

8. The control method of the attachment quick-change hydraulic control system according to any one of claims 1 to 6, characterized in that, The first instruction is to trigger the controller button, and the second instruction is to cancel the triggering action of the controller button.

9. A quick-change hydraulic control system for attachments, characterized in that, A control method for executing the attachment quick-change hydraulic control system according to any one of claims 1 to 8, comprising: The information acquisition module is used to collect mode information of the attachment quick-change hydraulic control system; The sending module is used to send the first and second instructions. The receiving module is used to receive the first instruction and the second instruction, and to control the quick-change shut-off valve, quick-change pressure reducing valve and quick-change directional valve to be energized or de-energized.

10. A type of operating machinery, characterized in that, The working machinery implements the control method of the attachment quick-change hydraulic control system as described in any one of claims 1-8, and the working machinery includes: The quick-change oil circuit is equipped with a quick-change shut-off valve, a quick-change pressure reducing valve, and a quick-change directional valve. The hydraulic cylinder is connected to the quick-change hydraulic circuit. The hydraulic cylinder includes a large chamber and a small chamber. The quick-change directional valve is used to control the flow of hydraulic fluid into or out of the large chamber and the small chamber. The main pump is used to pump oil into the quick-change oil circuit.

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