Control system of excavator with scarifier equipment and excavator

Abstract

The utility model provides a control system of an excavator with scarifier equipment and the excavator. The control system comprises a brake executing mechanism connected with a walking motor; the first pressure sensor is arranged on an action pilot oil way of the scarifier equipment, detects a pressurization signal of the action pilot oil way and sends a first pressure signal; the switching electromagnetic valve comprises a first working position communicated between a first oil inlet and a first oil outlet, the first oil inlet is connected with the oil supply pipeline, the first oil outlet is connected with the brake actuating mechanism, the switching electromagnetic valve receives a first control signal and is switched to the first working position, the oil supply pipeline is communicated with the brake actuating mechanism, and the first working position is communicated with the first oil inlet; the brake executing mechanism is switched to an unlocking state; and the vehicle control unit is in communication connection with the first pressure sensor and the control end of the switching electromagnetic valve, receives the first pressure signal and sends a first control signal. Under the condition that an original vehicle electromagnetic valve is not added, damage to the gear of the walking speed reducer caused by external force is effectively avoided.

Description

Technical Field

[0001] This application relates to the field of excavator technology, and in particular to a control system and an excavator equipped with a ripper. Background Technology

[0002] A ripper is a device that replaces the working device of an excavator with a heavy boom that is about three times heavier than before. The front end is equipped with a single tooth similar to an eagle hook, which breaks and removes rocks from the ground through downward impact and digging force.

[0003] In the prior art, the control system of an excavator equipped with a ripper has the following functions:

[0004] The travel device has two speed settings, high and low. These settings can be switched via a travel speed switch on the cab control panel, or automatically by the computer board when the travel pressure exceeds a set value. Specifically: When the travel speed switch on the cab control panel is in the low speed setting or the travel pressure exceeds the set value, the travel second-speed solenoid valve is at a low potential. The travel second-speed switching valve located within the travel device is connected to the oil tank, resulting in a small swashplate angle and slow travel speed, improving the excavator's maneuverability. When the travel speed switch on the cab control panel is in the high speed setting and the travel pressure is below the set value, the travel second-speed solenoid valve is at a high potential. The travel second-speed switching valve located within the travel device is connected to the pilot oil, and the high-pressure oil pushes the swashplate piston, causing the travel motor to increase the swashplate angle and resulting in a faster travel speed.

[0005] Due to the considerable weight and unique working method of equipment equipped with rippers, the single-hook attachment at the front drags the vehicle forward during impact excavation. Since the travel mechanism is entirely driven by external force and the brakes are not disengaged, this can easily lead to damage to the travel reducer gears. Therefore, how to solve this problem has become a research direction for those skilled in the art. Utility Model Content

[0006] The technical objective of this application is to provide a control system for an excavator equipped with a ripper, i.e., an excavator, to solve the problem that the brakes of current excavators equipped with rippers cannot be released in time when the ripper is in operation, which easily leads to damage to the gears of the travel reducer.

[0007] To address the aforementioned technical problems, embodiments of this application provide a control system for an excavator equipped with a ripper, comprising:

[0008] A braking actuator, connected to a travel motor, includes a braking state that restricts the rotation of the travel motor, and an unlocking state that does not restrict the rotation of the travel motor;

[0009] The first pressure sensor is installed in the pilot oil circuit of the ripper equipment. The first pressure sensor detects the pressurization signal of the pilot oil circuit and sends a first pressure signal.

[0010] The switching solenoid valve includes: a first working position connecting a first oil inlet and a first oil outlet, and a second working position disconnecting the first oil inlet and the first oil outlet, wherein the first oil inlet is connected to an oil supply line, and the first oil outlet is connected to the brake actuator; the switching solenoid valve receives a first control signal and switches from the second working position to the first working position, the oil supply line is connected to the brake actuator, and the brake actuator switches from a braking state to an unlocked state;

[0011] The vehicle controller is communicatively connected to the control terminals of the first pressure sensor and the switching solenoid valve, respectively. The vehicle controller receives the first pressure signal from the first pressure sensor and sends the first control signal to the switching solenoid valve.

[0012] Optionally, the control system described above further includes:

[0013] The second pressure sensor is installed in the swing pilot oil circuit of the excavator and is communicatively connected to the vehicle controller. The second pressure sensor detects the boost signal of the swing pilot oil circuit and sends a second pressure signal to the vehicle controller.

[0014] The vehicle controller receives the second pressure signal from the second pressure sensor and sends the first control signal to the switching solenoid valve.

[0015] Specifically, in the control system described above, the braking actuator includes:

[0016] The brake pads are connected to the travel motor and include a first state that restricts the rotation of the travel motor and a second state that does not restrict the rotation of the travel motor.

[0017] A brake piston includes: a piston rod connected to the brake pad, and a piston chamber for driving the piston rod to move linearly, wherein the piston chamber is in communication with the first oil outlet;

[0018] When the switching solenoid valve is in the first working position, the oil supply pipe supplies oil to the piston chamber through the first oil inlet and the first oil outlet, the piston rod switches to the extended state, and the brake pad switches to the first state.

[0019] Preferably, the control system described above further includes:

[0020] The travel control oil circuit has a second oil outlet connected to the travel motor via a first pipeline, and a third oil outlet connected to the brake actuator via a second pipeline.

[0021] The first oil outlet is connected to the end of the second pipeline near the brake actuator.

[0022] Preferably, in the control system described above, the switching solenoid valve includes a two-position three-way solenoid valve or a two-position two-way solenoid valve.

[0023] Another embodiment of this application provides an excavator with a ripper, comprising: the ripper and a control system for the excavator with the ripper as described above.

[0024] Compared with the prior art, the control system and excavator of the excavator equipped with a ripper provided in this application have at least the following beneficial effects:

[0025] This application changes the connection of the first oil outlet of the original two-speed travel switching solenoid valve from being connected to the travel motor swashplate to being connected to the brake actuator. Without adding the original vehicle solenoid valve, it achieves the connection of the oil supply line to the brake actuator. At the same time, by monitoring the pressure of the pilot oil circuit of the ripper equipment through a pressure sensor and controlling the working position of the switching solenoid valve through the vehicle controller, it can connect the oil supply line to the brake actuator when it is determined that the ripper equipment needs to act, thereby unlocking the brake actuator and effectively avoiding damage to the travel reducer gears caused by external forces. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the control system of the excavator equipped with a ripper according to this application.

[0027] [Explanation of Labels in the Attached Image]

[0028] 1. Braking actuator; 101. Brake pad; 102. Brake piston; 2. First pressure sensor; 3. Switching solenoid valve; 301. First oil inlet; 302. First oil outlet; 303. First working position; 304. Second working position; 4. Oil supply line; 5. Vehicle controller; 6. Second pressure sensor; 7. Travel control oil circuit; 701. Second oil outlet; 702. First line; 703. Third oil outlet; 704. Second line; 8. Travel motor. Detailed Implementation

[0029] To make the technical problems, technical solutions, and advantages of this application clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0030] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0031] In the various embodiments of this application, it should be understood that the sequence number of each process described below does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0032] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0033] In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0034] See Figure 1 A preferred embodiment of this application provides a control system for an excavator equipped with a ripper, comprising:

[0035] The braking actuator 1 is connected to the travel motor 8 and includes a braking state that restricts the rotation of the travel motor 8 and an unlocking state that does not restrict the rotation of the travel motor 8.

[0036] The first pressure sensor 2 is installed in the pilot oil circuit of the ripper equipment. The first pressure sensor 2 detects the pressurization signal of the pilot oil circuit and sends a first pressure signal.

[0037] The switching solenoid valve 3 includes: a first working position 303 connecting the first oil inlet 301 and the first oil outlet 302, and a second working position 304 disconnecting the first oil inlet 301 and the first oil outlet 302. The first oil inlet 301 is connected to an oil supply line 4, and the first oil outlet 302 is connected to the brake actuator 1. The switching solenoid valve 3 receives a first control signal and switches from the second working position 304 to the first working position 303. The oil supply line 4 is connected to the brake actuator 1, and the brake actuator 1 switches from a braking state to an unlocked state.

[0038] The vehicle controller 5 is communicatively connected to the control terminals of the first pressure sensor 2 and the switching solenoid valve 3, respectively. The vehicle controller 5 receives the first pressure signal from the first pressure sensor 2 and sends the first control signal to the switching solenoid valve 3.

[0039] In this embodiment, the first pressure sensor 2, installed on the pilot oil circuit of the ripper equipment, is used to detect the pressure on the pilot oil circuit. When a pressurization signal is detected in the pilot oil circuit, it is determined that the ripper equipment is about to or is in the process of operating. To prevent the external force generated by the operation of the ripper equipment from affecting the travel reducer when the travel motor 8 is restricted from rotating, a first pressure signal is sent to the vehicle controller 5. This first pressure signal is used to cause the vehicle controller 5 to generate a first control signal to control the switching solenoid valve 3. This first control signal is used to switch the switching solenoid valve 3 to the first working position 303, which connects the first oil inlet 301 and the first oil outlet 302. Since the first oil inlet 301 is connected to an oil supply line 4 and the first oil outlet 302 is connected to the brake actuator 1, switching to the first working position 303 at this time allows the oil supply line 4 to supply oil to the brake actuator 1, so that the brake actuator 1 can switch from the braking state to the unlocked state, thereby unlocking the travel motor 8 so that the travel motor 8 can rotate with the external force, thus avoiding damage to the gears of the travel reducer.

[0040] This application changes the connection of the first oil outlet 302 of the original two-speed travel switching solenoid valve 3 from being connected to the swashplate of the travel motor 8 to being connected to the brake actuator 1. Without adding the original vehicle solenoid valve, the oil supply line 4 is connected to the brake actuator 1. At the same time, the pressure of the pilot oil circuit of the ripper is monitored by a pressure sensor, and the working position of the switching solenoid valve 3 is switched by the vehicle controller 5. When it is determined that the ripper needs to perform an action, the oil supply line 4 is connected to the brake actuator 1, thereby unlocking the brake actuator 1 and effectively avoiding damage to the gears of the travel reducer caused by external force.

[0041] See Figure 1 Optionally, the control system described above further includes:

[0042] The second pressure sensor 6 is installed in the swing pilot oil circuit of the excavator and is communicatively connected to the vehicle controller 5. The second pressure sensor 6 detects the boost signal of the swing pilot oil circuit and sends a second pressure signal to the vehicle controller 5.

[0043] The vehicle controller 5 receives the second pressure signal from the second pressure sensor 6 and sends the first control signal to the switching solenoid valve 3.

[0044] In this embodiment, a second pressure sensor 6 can also be set to monitor the pressure in the swing pilot oil circuit of the excavator. When a pressure boosting signal is detected in the swing pilot oil circuit, a second pressure signal is sent to the vehicle controller 5. The vehicle controller 5 then sends a first control signal to the switching solenoid valve 3 based on the second pressure signal. This controls the switching solenoid valve 3 to switch to the first working position 303, which connects the oil supply line 4 and the brake actuator 1. This unlocks the brake actuator 1 and effectively prevents damage to the travel reducer gears caused by the external force generated during the excavator's rotation.

[0045] See Figure 1 Specifically, in the control system described above, the braking actuator 1 includes:

[0046] Brake pad 101 is connected to the travel motor 8 and includes a first state that restricts the rotation of the travel motor 8 and a second state that does not restrict the rotation of the travel motor 8.

[0047] The brake piston 102 includes: a piston rod connected to the brake pad 101, and a piston chamber for driving the piston rod to move linearly, wherein the piston chamber is in communication with the first oil outlet 302;

[0048] When the switching solenoid valve 3 is in the first working position 303, the oil supply pipe supplies oil to the piston chamber through the first oil inlet 301 and the first oil outlet 302, the piston rod switches to the extended state, and the brake pad 101 switches to the first state.

[0049] In this embodiment, the braking actuator 1 includes a brake pad 101 for connecting to the travel motor 8. The brake pad 101 can be used to brake and unlock the travel motor 8. In addition, the braking actuator 1 also includes a piston rod connected to the brake pad 101 and a piston chamber for driving the piston rod to move linearly. The piston chamber is connected to the first oil outlet 302. When the first oil outlet 302 supplies oil to the piston chamber, it will push the piston rod to move, thereby driving the brake pad 101 to unlock, that is, switch to the first state.

[0050] It should be noted that, based on the connection relationship between the piston rod and the brake pad 101, the connection position between the piston chamber and the first oil outlet 302 can be set accordingly. For example, if the brake pad 101 switches to the first state when the piston rod extends, the first oil outlet 302 is connected to the part of the piston chamber away from the brake pad 101; if the brake pad 101 switches to the first state when the piston rod retracts, the first oil outlet 302 is connected to the part of the piston chamber near the brake pad 101.

[0051] See Figure 1 Preferably, the control system described above further includes:

[0052] The travel control oil circuit 7 has a second oil outlet 701 connected to the travel motor 8 via a first pipe 702, and a third oil outlet 703 connected to the brake actuator 1 via a second pipe 704.

[0053] The first oil outlet 302 is connected to the end of the second pipeline 704 near the brake actuator 1.

[0054] In this embodiment, the control system further includes a walking control oil circuit 7, wherein the second oil outlet 701 of the walking control oil circuit 7 is connected to the walking motor 8 through a first pipeline 702, and the walking motor 8 can be driven by oil supply through the second oil outlet 701. Specifically, the second oil outlet 701 can be divided into a forward oil outlet and a reverse oil outlet. The forward oil outlet and the reverse oil outlet are respectively connected to the two ends of the walking motor 8 through a first pipeline 702, so as to drive the walking motor 8 forward or backward respectively.

[0055] The third oil outlet 703 of the travel control hydraulic circuit 7 is connected to the brake actuator 1 via the second pipeline 704. This allows the brake actuator 1 to be supplied with oil through the third oil outlet 703 and the second pipeline 704 when the excavator equipped with a ripper needs to travel, thereby releasing the rotation restriction on the travel motor 8 and ensuring the excavator's travel. Simultaneously, the first oil outlet 302 supplies oil to the brake actuator 1 via the second pipeline 704, further reducing changes to the original structure and thus reducing costs.

[0056] See Figure 1 Preferably, in the control system described above, the switching solenoid valve 3 includes a two-position three-way solenoid valve or a two-position two-way solenoid valve.

[0057] In this embodiment, based on other control requirements, the switching solenoid valve 3 can be configured as a two-position three-way solenoid valve or a two-position two-way solenoid valve, wherein, the present application's Figure 1An example was given using a two-position three-way solenoid valve. In this case, the switching solenoid valve 3 also includes a port connected to the oil tank. Through this port, when the brake actuator 1 switches to the braking state, the hydraulic oil input into the brake actuator 1 during unlocking can be output to the oil tank, ensuring the normal operation of the brake actuator 1 during state switching.

[0058] When switching solenoid valve 3 to a two-position two-way solenoid valve, the aforementioned port is in a closed state. When unlocking, the hydraulic oil input into the brake actuator 1 cannot be output through the switching solenoid valve 3, but can be output through the oil circuit corresponding to the original two-speed travel function.

[0059] Another embodiment of this application provides an excavator with a ripper, comprising: the ripper and a control system for the excavator with the ripper as described above.

[0060] The excavator equipped with a ripper provided in this embodiment can, through the above-mentioned control system, unlock the braking actuator by controlling the switching position of the solenoid valve when the ripper is detected to move or the excavator is rotating, without adding the original vehicle solenoid valve. This effectively avoids damage to the travel reducer gear caused by external force.

[0061] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0062] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0063] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A control system for an excavator equipped with a ripper, characterized in that, include: The braking actuator (1) is connected to the travel motor (8) and includes a braking state that restricts the rotation of the travel motor (8) and an unlocking state that does not restrict the rotation of the travel motor (8). The first pressure sensor (2) is installed on the pilot oil circuit of the ripper equipment. The first pressure sensor (2) detects the pressurization signal of the pilot oil circuit and sends the first pressure signal. The switching solenoid valve (3) includes: a first working position (303) connecting the first oil inlet (301) and the first oil outlet (302) and a second working position (304) disconnecting the first oil inlet (301) and the first oil outlet (302), wherein the first oil inlet (301) is connected to an oil supply line (4) and the first oil outlet (302) is connected to the brake actuator (1); the switching solenoid valve (3) receives a first control signal and switches from the second working position (304) to the first working position (303), the oil supply line (4) is connected to the brake actuator (1), and the brake actuator (1) switches from the braking state to the unlocking state; The vehicle controller (5) is communicatively connected to the control terminals of the first pressure sensor (2) and the switching solenoid valve (3). The vehicle controller (5) receives the first pressure signal from the first pressure sensor (2) and sends the first control signal to the switching solenoid valve (3).

2. The control system according to claim 1, characterized in that, Also includes: The second pressure sensor (6) is installed on the swing pilot oil circuit of the excavator and is connected in communication with the vehicle controller (5). The second pressure sensor (6) detects the boost signal of the swing pilot oil circuit and sends a second pressure signal to the vehicle controller (5). The vehicle controller (5) receives the second pressure signal from the second pressure sensor (6) and sends the first control signal to the switching solenoid valve (3).

3. The control system according to claim 1 or 2, characterized in that, The braking actuator (1) includes: Brake pad (101) is connected to the travel motor (8) and includes a first state that restricts the rotation of the travel motor (8) and a second state that does not restrict the rotation of the travel motor (8); The brake piston (102) includes: a piston rod connected to the brake pad (101) and a piston chamber for driving the piston rod to move linearly, wherein the piston chamber is in communication with the first oil outlet (302); When the switching solenoid valve (3) is in the first working position (303), the oil supply pipe supplies oil to the piston chamber through the first oil inlet (301) and the first oil outlet (302), the piston rod switches to the extended state, and the brake pad (101) switches to the first state.

4. The control system according to claim 1 or 2, characterized in that, Also includes: The travel control oil circuit (7) has a second oil outlet (701) connected to the travel motor (8) via a first pipeline (702), and a third oil outlet (703) connected to the brake actuator (1) via a second pipeline (704). The first oil outlet (302) is connected to the end of the second pipeline (704) near the brake actuator (1).

5. The control system according to claim 1, characterized in that, The switching solenoid valve (3) includes a two-position three-way solenoid valve or a two-position two-way solenoid valve.

6. An excavator equipped with a soil ripper, characterized in that, include: The ripper equipment and the control system of the excavator equipped with the ripper equipment as described in any one of claims 1 to 5.

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