Starting circuit, starting protection device, and working machine

Abstract

The embodiment of the utility model provides a starting circuit, a starting protection device and an operation machine. The method comprises the following steps: a relay used for controlling on-off of a starting circuit; the power supply equipment is connected with the relay and the starter and used for supplying power; the current sensor is respectively connected with the relay and the starter and is used for acquiring the working current of the starter; the control module is connected with the power supply equipment, the relay, the current sensor and the engine and used for controlling the relay according to the working current and the working rotating speed of the engine; and the rotating speed sensor is installed on a flywheel of the engine, connected with the control module and used for collecting the working rotating speed of the engine, and the current sensor and the rotating speed sensor are arranged in the starting circuit, so that the risk of secondary starting of the engine is completely eradicated.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, in particular to a starting circuit, a starting protection device and a working machine. BACKGROUND

[0002] The engine converts the chemical energy of fuel into mechanical energy to provide power for the working machine. Due to the misoperation of the operator or the failure of the working machine, the control signal may be abnormal, and the engine may be started twice, which not only causes serious damage to the expensive and vulnerable parts such as the flywheel ring gear of the starter and the engine, greatly shortens the service life of these parts, but also causes the starting circuit to fail, affecting the normal operation of the working machine. SUMMARY

[0003] The purpose of the embodiment of the present application is to provide a starting circuit, a starting protection device and a working machine to solve the technical problem that the engine is started twice in the prior art, causing the working machine to fail to operate normally.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a starting circuit, comprising:

[0005] A relay is used to control the on-off of the starting circuit.

[0006] A power supply device is connected with the relay and the starter, and is used to supply power.

[0007] A current sensor is connected with the relay and the starter respectively, and is used to collect the working current of the starter.

[0008] A control module is connected with the power supply device, the relay, the current sensor and the engine respectively, and is used to control the relay according to the working current and the working speed of the engine.

[0009] A speed sensor is installed on the flywheel of the engine, and is connected with the control module, and is used to collect the working speed of the engine.

[0010] In the embodiment of the present application, the relay comprises a normally open switch and a coil; the normally open switch is connected with the positive side of the power supply device and the current sensor respectively; one side of the coil is connected with the control module, and the other side of the coil is grounded.

[0011] In the embodiment of the present application, the control module is built-in with a timer, which is used to accumulate the single starting time length of the engine.

[0012] In the embodiment of the present application, the control module is further built-in with an alarm detection module, which is used to send an alarm prompt in the case that the single starting time length is greater than the preset time length.

[0013] In the embodiment of the present application, the starting circuit further comprises a safety element; the safety element is installed on the positive side of the power supply device and is connected with the positive side, the relay and the control module respectively.

[0014] In the embodiment of the present application, the safety element is a fuse.

[0015] In the embodiment of the present application, a shielded cable is used to connect the speed sensor and the control module.

[0016] In the embodiment of the present application, the power supply device is a storage battery.

[0017] The second aspect of the present application provides a starting protection device comprising the starting circuit described above.

[0018] The third aspect of the present application provides a working machine comprising:

[0019] a starter;

[0020] an engine;

[0021] the starting protection device described above.

[0022] Through the above technical solution, the current sensor and the speed sensor are arranged in the starting circuit, which completely eliminates the risk of secondary starting of the engine, effectively protects the expensive and vulnerable components such as the flywheel ring gear of the starter and the engine, prolongs the service life of the working machine, reduces the maintenance cost of the working machine, reduces the occurrence of starting circuit failure, and enables the working machine to operate normally. In addition, the control module is built-in timer, which strictly controls the starting time of the starter, avoids unnecessary waste of power, and ensures the reasonable use of power.

[0023] Other features and advantages of the embodiments of the present application will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are used to provide further understanding of the embodiments of the present application and constitute a part of the specification, and are used to explain the embodiments of the present application together with the following specific implementation, but do not constitute a limitation on the embodiments of the present application. In the drawings:

[0025] Figure 1 The circuit structure schematic diagram of the starting circuit according to the embodiment of the present application is schematically shown. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. It should be understood that the specific implementation described herein is only used to explain and describe the embodiments of the present application, and should not be used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0027] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, motion condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0028] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and should not be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0029] In the embodiments of the present application, a starting circuit is provided, and the starting circuit comprises:

[0030] A relay is used to control the on-off of the starting circuit.

[0031] A power supply device is connected with the relay and the starter, and is used to supply power.

[0032] A current sensor is connected with the relay and the starter respectively, and is used to collect the working current of the starter.

[0033] A control module is connected with the power supply device, the relay, the current sensor and the engine respectively, and is used to control the relay according to the working current and the working speed of the engine.

[0034] A speed sensor is installed on the flywheel of the engine, and is connected with the control module, and is used to collect the working speed of the engine.

[0035] The starting circuit includes a power supply device connected to a relay and a starter motor, which supplies power to the starter motor. The power supply device can be any device with power supply functionality; in this embodiment, it is a battery. The battery provides current to the starter motor to ensure smooth engine starting.

[0036] The starting circuit includes a current sensor that collects the starter motor's operating current. The current sensor is made of a high-precision Hall element, featuring fast response and strong anti-interference capabilities. After collecting the starter motor's operating current, the current sensor converts the corresponding current signal into an electrical signal and transmits it to the control module.

[0037] The starting circuit includes a speed sensor mounted on the engine's flywheel, which senses changes in the flywheel's ring gear speed. The speed sensor is used to acquire the engine's operating speed. After acquiring the engine's operating speed, the speed sensor transmits this information to the control module.

[0038] In one embodiment, both the current sensor and the speed sensor can communicate with the control module via a CAN bus.

[0039] In this embodiment, the speed sensor and the control module can be connected by a shielded cable to ensure the stability of signal transmission between the speed sensor and the control module and to avoid external electromagnetic interference.

[0040] The starting circuit includes a control module and relays. The control module is connected to the power supply, relays, current sensor, and engine. The relays control the on / off state of the starting circuit. The control module receives the starter motor's operating current from the current sensor and the engine's operating speed from the speed sensor. Based on the operating current and engine speed, the control module controls the relays to control the on / off state of the starting circuit, preventing secondary starting.

[0041] Specifically, in one embodiment, when the starter's operating current increases instantaneously and the engine's operating speed has not reached the preset idle speed, the control module can determine that the engine is in the process of starting. At this time, if a start command signal is received again, the control module can control the relay to cut off the starting circuit to prevent the starter from starting again.

[0042] In this embodiment, the relay includes a normally open switch and a coil; the normally open switch is connected to the positive side of the power supply device and the current sensor respectively; one side of the coil is connected to the control module, and the other side of the coil is grounded.

[0043] The relay consists of a normally open switch and a coil. One side of the coil is connected to the control module, and the other side is grounded. The normally open switch is connected to the positive terminal of the power supply and a current sensor. When the starter motor's operating current increases instantaneously and the engine speed has not reached the preset idle speed, the control module can determine that the engine is starting. At this time, the normally open switch of the relay is closed, and the starting circuit is energized. If a start command signal is received again, the control module can control the normally open switch of the relay to open, thereby cutting off the starting circuit and preventing the starter motor from restarting.

[0044] In this embodiment of the application, the control module has a built-in timer for accumulating the duration of a single engine start-up.

[0045] During each engine start-up, a partial blockage of the fuel filter may occur, leading to insufficient fuel supply. Prolonged starting in this situation could cause the starter motor to overheat and be damaged. To address this, the control module incorporates a timer. The timer accumulates the duration of each engine start-up attempt.

[0046] During engine starting, the control module synchronously accumulates the engine starting time using a timer and detects whether the starting time of a single engine start exceeds a preset time. If the starting time of a single engine start exceeds the preset time, the control module can control the relay to cut off the starting circuit. Specifically, it can control the normally open switch of the relay to open, thereby cutting off the starting circuit and preventing the starter motor from overheating and being damaged.

[0047] In this embodiment of the application, the control module also has a built-in alarm detection module, which is used to send an alarm prompt when the single start-up duration exceeds the preset duration.

[0048] To further protect the starter motor during operation, the control module also includes a built-in alarm detection module. This module can send an alarm notification to a terminal if the starter motor's duration exceeds a preset time. For example, it can send an alarm notification to the display terminal of the equipment where the starter motor is located. If the equipment is a work machine, the notification can be sent to the display screen in the operator's cab of that machine.

[0049] In one embodiment, the preset duration refers to the safe starting time of the engine, within which starting the engine can ensure that the starter motor does not overheat and become damaged. The preset duration can be set according to actual conditions. For example, the preset duration can be set to 10 seconds.

[0050] In this embodiment, the starting circuit further includes a safety element; the safety element is installed on the positive side of the power supply device and is connected to the positive side, the relay, and the control module respectively.

[0051] The starting circuit also includes a safety element, which is installed on the positive side of the power supply equipment to maintain the power supply safety of the equipment. The safety element is also connected to the normally open switch of the relay and the control module.

[0052] In this embodiment, the safety element is a fuse. In the event of a short circuit in the starting circuit, the fuse can quickly disconnect the starting circuit by melting, thereby preventing damage to the equipment containing the starter motor or a safety accident, and ensuring the safety of the engine starting process.

[0053] In one embodiment, the starting circuit further includes a start switch, which is connected to the control module, and the control module can receive a start switch signal sent by the start switch.

[0054] like Figure 1 As shown, a circuit structure diagram of a starting circuit is provided. The starting circuit includes a fuse, a battery, a control module 1, a current sensor 2, a speed sensor 3, and a relay 4.

[0055] The relay 4 includes a normally open switch and a coil. The control module 1 includes a start control interface, a current detection interface, a speed detection interface, a positive power supply interface, a negative power supply interface, and a start signal detection interface. The start signal detection interface is connected to the start switch to receive start switch signals. The negative power supply interface is grounded, and the positive power supply interface is connected to one side of the fuse and the normally open switch of the relay 4. The other side of the fuse is connected to the positive terminal of the battery, and the negative terminal of the battery is grounded.

[0056] The speed detection interface is connected to speed sensor 3, which is connected to the engine flywheel to detect the engine's operating speed. The current detection interface is connected to current sensor 2. Current sensor 2 is located between the starter motor and relay 4. The starter motor is connected to both current sensor 2 and the negative terminal of the battery. The normally open switch of relay 4 is connected to both a fuse and current sensor 2. The starter control interface is connected to one side of the coil of relay 4, and the other side of the coil is grounded.

[0057] By incorporating current and speed sensors into the starting circuit, the risk of secondary engine starting is completely eliminated. This effectively protects expensive and easily damaged components such as the starter motor and engine flywheel ring gear, extending the service life of the machinery, reducing maintenance costs, and minimizing starter circuit failures, thus ensuring normal operation of the machinery. Furthermore, the control module includes a built-in timer to strictly control the starter motor's starting duration, preventing unnecessary power waste and ensuring efficient power usage.

[0058] In this application embodiment, a starting protection device is provided, including the starting circuit described above.

[0059] In this application embodiment, a working machine is provided, including:

[0060] starter;

[0061] engine;

[0062] The aforementioned starting protection device.

[0063] In one embodiment, the operating machinery may be earthmoving machinery, which may include earthmoving and transport machinery, excavating machinery, soil transport machinery, leveling machinery, and compaction machinery. Earthmoving and transport machinery may include bulldozers, scrapers, and loaders. Excavating machinery may include single-bucket excavators and multi-bucket excavators. Soil transport machinery may include dump trucks. Leveling machinery may include graders. Compaction machinery may include road rollers and tampers.

[0064] In one embodiment, the operating machinery may further include an alarm device for issuing an alarm. This alarm device may include an audible and visual alarm device, a voice alarm device, a remote notification alarm device, etc. The audible and visual alarm device may include a buzzer and a flashing light. A buzzer can be used for high-frequency audible warnings. A flashing light can be used for visual warnings. The voice alarm device may have pre-recorded voice prompts. The remote notification alarm device may be used for SMS / telephone alarms, APP push alarms, and cloud platform alarms.

[0065] The starting protection device includes a starting circuit. The starting circuit includes a relay, power supply, current sensor, control module, and speed sensor. The control module has a built-in alarm detection module that can detect whether the duration of a single engine start exceeds a preset duration. If the detected starting duration exceeds the preset duration, it indicates that the engine starting time is too long and may have exceeded the set starting safety threshold.

[0066] At this time, the alarm detection module of the control module can send alarm prompts through alarm devices. For example, it can issue sound / visual alarm prompts through audible and visual alarm devices, issue voice alarm prompts through voice alarm devices, and issue SMS / telephone alarm prompts through remote notification alarm devices. Simultaneously, the control module can control the relay to cut off the starting circuit. Specifically, it can control the normally open switch of the relay to open, thereby cutting off the starting circuit, preventing the starter motor from overheating and being damaged, reducing the equipment failure rate caused by excessively long starting time, and improving the safety and reliability of equipment operation.

[0067] The power supply unit connects to the relay and starter motor, providing power to the starter motor. A current sensor, made with a high-precision Hall effect element, collects the starter motor's operating current, offering fast response and strong anti-interference capabilities. After collecting the starter motor's operating current, the current sensor converts the corresponding current signal into an electrical signal and transmits it to the control module. A speed sensor, mounted on the engine's flywheel, senses changes in the flywheel's ring gear speed. The speed sensor collects the engine's operating speed and transmits this speed data to the control module.

[0068] The control module is connected to the power supply, relays, current sensors, and the engine. The relays control the on / off state of the starting circuit. The control module receives the starter motor's operating current from the current sensor and the engine's operating speed from the speed sensor. Based on the operating current and engine speed, the control module controls the relays to control the on / off state of the starting circuit, preventing secondary starting.

[0069] For example, in combination with the above Figure 1 Taking a bulldozer as an example, after completing a material loading and unloading task, the bulldozer briefly pauses to prepare for the next bulldozing operation. At this time, the operator presses the start button, and the current sensor 2 immediately detects an increase in the main circuit current of the starter and transmits an electrical signal to the control module 1. At the same time, the speed sensor 3 continuously monitors the change in the engine flywheel speed and feeds back a signal to the control module 1.

[0070] Control module 1 determines that the engine is in the normal starting phase. If the start button is pressed again due to operator error, control module 1 can quickly control relay 4 to cut off the starter circuit, preventing damage to the equipment from a second engine start. After the engine starts successfully, control module 1 records the start time. If, during a subsequent cold start, fuel supply is insufficient due to partial blockage of the fuel filter, extending the start time, and control module 1's timing exceeds the set safety threshold, control module 1 can control relay 4 to disconnect the starter circuit, preventing the starter from overheating and being damaged. Furthermore, an audible and visual alarm signal can be emitted through the display screen on the bulldozer's instrument panel to remind the operator to check the fuel system.

[0071] For example, combining the above... Figure 1Taking bulldozers as an example of operating machinery, in harsh environments at mining sites, bulldozers face frequent starts and stops as well as complex operating conditions. Current sensor 2 and speed sensor 3 operate stably, and even in environments with strong electromagnetic interference, thanks to their excellent anti-interference design, they can still accurately transmit signals to control module 1. During a bulldozer operation in a high-altitude, low-temperature environment, the engine experienced difficulty starting in cold conditions, increasing the starting time. However, because the control module has a built-in timer, it monitors the engine's single-start duration in real time.

[0072] When the starting time approaches the safety threshold, the control module 1 controls the relay 4 to intermittently switch the starter circuit on and off, assisting the engine intake air and fuel to mix, so as to successfully start the engine within the safe time range, avoid excessive consumption of battery power, improve the bulldozer's adaptability under complex working conditions, and ensure the bulldozer's continuous and efficient operation.

[0073] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0074] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A starting circuit, characterized by The starting circuit comprises: a relay for controlling on-off of the starting circuit; a power supply device connected with the relay and the starter for power supply; a current sensor connected with the relay and the starter respectively for collecting working current of the starter; a control module connected with the power supply device, the relay, the current sensor and the engine respectively for controlling the relay according to the working current and working speed of the engine; a speed sensor installed on a flywheel of the engine and connected with the control module for collecting working speed of the engine; wherein the control module is built-in with a timer for accumulating single starting time of the engine, and the control module is further used for controlling the normally open switch of the relay to be turned off when the single starting time exceeds a preset time. The current sensor is made of high-precision Hall element.

2. The starting circuit of claim 1, wherein The relay comprises a normally open switch and a coil; the normally open switch is connected with the positive side of the power supply device and the current sensor respectively; one side of the coil is connected with the control module, and the other side of the coil is grounded.

3. The starting circuit of claim 1, wherein The control module is further built-in with an alarm detection module for sending an alarm prompt when the single starting time is greater than the preset time.

4. The starting circuit of claim 1, wherein The starting circuit further comprises a safety element; the safety element is installed on the positive side of the power supply device and connected with the positive side, the relay and the control module respectively.

5. The starting circuit of claim 4, wherein The safety element is a fuse.

6. The starting circuit according to any one of claims 1 to 5, characterized in that The speed sensor is connected with the control module by a shielded cable.

7. The starting circuit according to any one of claims 1 to 5, characterized in that The power supply device is a storage battery.

8. A starting protection device, characterized in that The starting circuit comprises:

9. A work machine characterized by, a starter; an engine; the starting protection device according to claim 8. ​

Images