A truck-mounted crane transport vehicle and a preset circuit thereof

Abstract

This invention discloses a truck-mounted crane and its pre-installed circuit. The pre-installed circuit includes a chassis circuit, a crane circuit, and a connecting module. The crane circuit includes a start-stop control device for generating a start control signal or a stop control signal. The chassis circuit includes a start trigger unit, a stop trigger unit, and an on-board control unit. The stop trigger unit and the start trigger unit are respectively connected to the start-stop control device. The start trigger unit generates a start trigger signal, and the stop trigger unit generates a stop trigger signal. The on-board control unit is connected to both the stop trigger unit and the start trigger unit, and controls the engine start-stop based on the start and stop trigger signals. The connecting module is located between the chassis circuit and the crane circuit. This invention reduces assembly difficulty, improves the safety and reliability of the pre-installed circuit and the truck-mounted crane, and reduces manual labor.

Description

Technical Field

[0001] The present invention relates to automobile manufacturing technology, and more particularly to a vehicle-mounted crane transport vehicle and its pre-installed circuit. Background Technology

[0002] In the production process of truck-mounted cranes, the chassis manufacturer usually needs to produce the chassis for transportation, the crane manufacturer produces the crane installed on the chassis, and finally the assembly plant assembles the chassis and the crane before the truck-mounted crane can leave the factory.

[0003] The existing pre-installed circuits include a chassis circuit installed on the chassis and a lifting circuit installed on the crane. The two circuits are manufactured by different manufacturers. During assembly, the assembly plant modifies and connects the circuits on both sides according to the assembly requirements.

[0004] However, the circuit products manufactured by chassis manufacturers and crane equipment manufacturers are often not directly compatible, and the performance of pre-installed circuits relies too heavily on modifications made by assembly plants, resulting in low reliability. Furthermore, during operation, the crane equipment on truck-mounted cranes cannot control the engine to start and stop as needed, which not only increases the driver's workload and working hours but also affects vehicle safety. Summary of the Invention

[0005] This invention provides a truck-mounted crane and its pre-installed circuit, which reduces the dependence of circuit performance on the professional skills of assembly workers, lowers the assembly difficulty, improves the safety and reliability of the pre-installed circuit and the truck-mounted crane, and reduces the workload.

[0006] In a first aspect, embodiments of the present invention provide a pre-set circuit for a truck-mounted crane transport vehicle. The pre-set circuit includes a chassis circuit, a crane circuit, and a connection module. The crane circuit includes a start-stop control device, which is used to generate a start control signal or a shutdown control signal.

[0007] The chassis circuit includes a start trigger unit, a stop trigger unit, and an on-board control unit. The stop trigger unit and the start trigger unit are respectively connected to the start-stop control device. The start trigger unit is used to generate a start trigger signal according to the start control signal, and the stop trigger unit is used to generate a stop trigger signal according to the stop control signal.

[0008] The vehicle control unit is connected to the engine shutdown trigger unit and the engine start trigger unit respectively. The vehicle control unit is used to control the engine to start according to the engine start trigger signal and control the engine to shut down according to the engine shutdown trigger signal.

[0009] The connection module is located between the undercarriage circuit and the lifting circuit, and is used to control the disconnection or connection of the corresponding lines between the undercarriage circuit and the lifting circuit.

[0010] Optionally, the vehicle control unit includes a start detection positive terminal, a start detection negative terminal, a shutdown detection positive terminal, and a shutdown detection negative terminal, and the start-stop control device includes a start control terminal and a shutdown control terminal;

[0011] The start-up triggering unit includes a first normally open relay, the two ends of which are connected to the start-up detection positive terminal and the start-up detection negative terminal, respectively. The control terminal of the first normally open relay is connected to the start-up control terminal via the connection module. The first normally open relay is used to turn on according to the start-up control signal to generate the start-up triggering signal.

[0012] The flameout triggering unit includes a second normally open relay. The two ends of the second normally open relay are respectively connected to the positive terminal of the flameout detection and the negative terminal of the flameout detection. The control terminal of the second normally open relay is connected to the flameout control terminal via the connection module. The second normally open relay is used to conduct according to the flameout control signal to generate the flameout triggering signal.

[0013] Optionally, the start-stop control device further includes a two-position selector switch, wherein the first position signal output interface of the two-position selector switch serves as the start control terminal, and the second position signal output interface of the two-position selector switch serves as the shut-off control terminal.

[0014] Optionally, the lifting circuit further includes lifting electrical equipment, and the undercarriage circuit further includes an energy storage unit and a main power switch. One end of the main power switch is connected to the energy storage unit, and the other end of the main power switch is connected to the lifting electrical equipment via the connection module.

[0015] Optionally, the lifting circuit further includes a protection unit, which is disposed between the main power switch and the connection module. The protection unit is used to control the disconnection of the line between the main power switch and the connection module when a power failure is detected in the line.

[0016] Optionally, the lifting circuit includes a lifting throttle unit, which includes a start / stop control terminal and a signal output terminal; the lifting throttle unit is used to generate a start / stop signal and output it through the start / stop control terminal, and to generate a throttle control signal and output it through the signal output terminal.

[0017] The chassis circuit also includes a reserved throttle, which includes a start / stop function terminal and a signal input terminal. The start / stop function terminal is connected to the start / stop control terminal via the connection module, and the signal input terminal is connected to the signal output terminal via the connection module. The reserved throttle is used to adjust the engine speed according to the throttle control signal when the start / stop signal includes start information.

[0018] Optionally, the undercarriage circuit further includes a neutral simulation unit, a parking power take-off switch, a crane power take-off switch, and a parking brake switch. The parking power take-off switch is used to generate a first control signal to control the on / off state of the parking power take-off, the crane power take-off switch is used to generate a second control signal to control the on / off state of the crane power take-off, and the parking brake switch is used to generate a third control signal to control the on / off state of the parking brake device.

[0019] The neutral simulation unit is connected to the vehicle control unit, the crane power take-off switch, the parking power take-off switch and the parking brake switch respectively. The neutral simulation unit is used to generate a neutral simulation signal when the first control signal, the second control signal and the third control signal are all open signals.

[0020] The vehicle control unit is used to control the engine to start according to the start trigger signal when a neutral signal or the neutral simulated signal is detected.

[0021] Optionally, the vehicle control unit includes a first neutral detection terminal and a second neutral detection terminal;

[0022] The neutral gear simulation unit includes a third normally open relay and a fourth normally open relay, which are connected in series between the first neutral gear detection terminal and the second neutral gear detection terminal. The control terminal of the third normally open relay is connected to the parking power take-off switch, and the third normally open relay is used to close when the first control signal is detected. The control terminal of the fourth normally open relay is connected to the crane power take-off switch and the parking brake switch, respectively, and the fourth normally open relay is used to close when the second control signal and the third control signal are detected. The neutral gear simulation unit is used to generate the neutral gear simulation signal when both the third and fourth normally open relays are closed.

[0023] Optionally, the connection module includes a connector and a conductive slip ring.

[0024] Secondly, embodiments of the present invention also provide a truck-mounted crane transport vehicle, which includes any of the pre-set circuits described in the first aspect.

[0025] The present invention provides a truck-mounted crane and its pre-installed circuit. The circuits of the undercarriage circuit and the crane circuit are one-to-one. The start trigger unit and the stop trigger unit are respectively connected to different interfaces of the start-stop control device. The start trigger unit can generate a start trigger signal based on the start control signal to trigger the on-board control unit to start the engine. The stop trigger unit can generate a stop trigger signal based on the stop control signal to trigger the on-board control unit to stop the engine. This achieves a one-to-one correspondence between the connection lines of the undercarriage circuit and the crane circuit. Furthermore, connection modules are provided on the connection lines of the crane circuit and the undercarriage circuit. Assembly only requires plugging in the wiring, reducing reliance on the professional skills of assembly workers and lowering the assembly difficulty. The inclusion of a neutral simulation unit to generate a neutral simulation signal improves the safety and reliability of the pre-installed circuit and the truck-mounted crane, while reducing workload. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the composition of a pre-set circuit in the prior art;

[0027] Figure 2 A schematic diagram of a preset circuit provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of another preset circuit provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of another preset circuit provided in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of another preset circuit provided in an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of another preset circuit provided in an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of another preset circuit provided in an embodiment of the present invention;

[0033] Figure 8 A schematic diagram illustrating the composition of the plug-in surface of a connector provided in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the composition of a truck-mounted crane transport vehicle provided in an embodiment of the present invention. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0036] As described in the background art, refer to Figure 1 Circuit products manufactured by chassis manufacturers and crane equipment manufacturers are often incompatible. Research by the inventors has shown that existing crane equipment manufacturers' crane circuits 120 include a start-stop control device 102 with two output interfaces. However, chassis manufacturers' chassis circuits 110 have an onboard control unit 101 with four start-stop detection interfaces: a positive start detection terminal 1+, a negative start detection terminal 1-, a positive engine shutdown detection terminal 2+, and a negative engine shutdown detection terminal 2-. During assembly, the assembly plant needs to remove the start-stop control device 102 with its two output interfaces and replace it with a start control device 103 and a shutdown control device 104. Then, the positive start detection terminal 1+ and the negative start detection terminal 1- are connected to the start control device 103, and the positive engine shutdown detection terminal 2+ and the negative engine shutdown detection terminal 2- are connected to the shutdown control device 104 to achieve start-stop control of the chassis engine by the crane equipment. This assembly process is cumbersome and labor-intensive. Furthermore, modifications made during the assembly process often result in the malfunction of the truck-mounted crane due to errors by assembly workers, and the reliability of prefabricated circuits is poor.

[0037] To address the aforementioned problems, this invention provides a pre-installed circuit for a truck-mounted crane transport vehicle. Figure 2 This is a schematic diagram of a preset circuit provided in an embodiment of the present invention, with reference to... Figure 2 The preset circuit 100 includes a chassis circuit 110, a lifting circuit 120, and a connection module 130. The lifting circuit 120 includes a start-stop control device 102, which generates a start control signal or a shutdown control signal. The chassis circuit 110 includes a start trigger unit 105, a shutdown trigger unit 106, and an on-board control unit 101. The shutdown trigger unit 106 and the start trigger unit 105 are respectively connected to the start-stop control device 102. The start trigger unit 105 generates a start trigger signal based on the start control signal, and the shutdown trigger unit 106 generates a shutdown trigger signal based on the shutdown control signal. The on-board control unit 101 is connected to both the shutdown trigger unit 106 and the start trigger unit 105. The on-board control unit 101 controls the engine to start based on the start trigger signal and controls the engine to shut down based on the shutdown trigger signal. The connection module 130 is located between the undercarriage circuit 110 and the lifting circuit 120, and is used to control the disconnection or connection of the corresponding lines between the undercarriage circuit 110 and the lifting circuit 120.

[0038] Among them, the truck-mounted crane transport vehicle refers to a transport vehicle equipped with lifting equipment. The driver can drive the transport vehicle from the cab of the undercarriage or perform lifting operations on the lifting equipment. The power of the lifting equipment is supplied by the engine of the undercarriage. During the lifting process, the driver needs to adjust the engine status on the lifting equipment to adapt the engine output power to the lifting requirements of the equipment. The undercarriage circuit 110 refers to the circuit section installed on the undercarriage, which can be connected to the lifting equipment and adjust the engine operating status according to the signals sent by the lifting equipment to meet the power requirements of the lifting equipment. The lifting circuit 120 refers to the circuit section installed on the lifting equipment, which can receive the driver's operation commands and then send control signals to the undercarriage circuit 110 according to the operation commands. The connection module 130 refers to the connection device between the undercarriage circuit 110 and the lifting circuit 120, which can realize the corresponding connection and signal transmission between the undercarriage circuit 110 and the lifting circuit 120. The start trigger unit 105 refers to the start trigger signal generation component, which can generate a start trigger signal according to the start control signal. The engine shutdown trigger unit 106 refers to the component that generates the engine shutdown trigger signal, which can generate an engine shutdown trigger signal based on the engine shutdown control signal. The vehicle control unit 101 refers to the electronic control unit of the chassis, also known as the vehicle computer, which can control the engine to shut down based on the engine shutdown trigger signal and control the engine to start based on the start trigger signal. The start-stop control device 102 refers to the start-stop control component installed on the lifting equipment, which can generate a start control signal or an engine shutdown control signal based on the driver's operation.

[0039] Specifically, the start-stop control device 102 can be a signal generation component, installed in the operator's cab of the crane equipment. It can generate start control signals or shutdown control signals based on the operator's actions. For example, the start-stop control device 102 may include a rocker switch or a single-pole double-throw switch, allowing the operator to generate the corresponding control signal. The start trigger unit 105 can generate a start trigger signal based on the start control signal to trigger the on-board control unit 101 to start the engine. The shutdown trigger unit 106 can generate a shutdown trigger signal based on the shutdown control signal to trigger the on-board control unit 101 to shut down the engine. For example, both the start trigger unit 105 and the shutdown trigger unit 106 may include normally open relays, transistors, or other controllable switching devices. The on-board control unit 101 is connected to the start trigger unit 105 and can detect the start trigger signal from the start trigger unit 105. Upon detecting the start trigger signal, it can control the engine to start. The vehicle control unit 101 is connected to the engine shutdown trigger unit 106 and can detect the engine shutdown trigger signal from the engine shutdown trigger unit 106. Upon detecting the engine shutdown trigger signal, it can control the engine to shut down, thus achieving engine start-stop control on the lifting equipment. The connection module 130 is located between the undercarriage circuit 110 and the lifting circuit 120, and can include an undercarriage connection part and a lifting connection part. The interfaces of the two parts correspond one-to-one and can be connected by different manufacturers. For example, the undercarriage connection part can include two interfaces: a first interface can be connected to the start trigger unit 105, and a second interface can be connected to the engine shutdown trigger unit 106. Correspondingly, the lifting connection part also includes two interfaces: a third interface corresponds to the first interface and can be connected to the start control signal output interface on the start-stop control device 102; a fourth interface corresponds to the second interface and can be connected to the engine shutdown control signal output interface on the start-stop control device 102. The corresponding interfaces can be indicated by setting the same number or icon. During the assembly process, the assembly worker only needs to find the corresponding interfaces of the two parts of the connection module 130 for plugging, which reduces the workload of the assembly worker and the possibility of errors, and improves the reliability of the pre-set circuit 100.

[0040] The pre-installed circuit of the truck-mounted crane provided in this embodiment has a one-to-one correspondence between the chassis circuit and the crane circuit. The start trigger unit and the shut-off trigger unit are respectively connected to different interfaces of the start-stop control device. The start trigger unit can generate a start trigger signal according to the start control signal to trigger the on-board control unit to start the engine. The shut-off trigger unit can generate a shut-off trigger signal according to the shut-off control signal to trigger the on-board control unit to shut down the engine. This achieves a one-to-one correspondence between the chassis circuit and the crane circuit. Furthermore, connection modules are provided on the connection lines of the crane circuit and the chassis circuit. During assembly, only plugging is required to assemble the wiring, reducing reliance on the professional skills of assembly workers, lowering the assembly difficulty, and improving the reliability of the pre-installed circuit.

[0041] Optionally, Figure 3 This is a schematic diagram of another preset circuit provided in an embodiment of the present invention, referring to... Figure 3 Based on the aforementioned embodiments, the vehicle control unit 101 includes a start detection positive terminal 1+, a start detection negative terminal 1-, an engine shutdown detection positive terminal 2+, and an engine shutdown detection negative terminal 2-. The start-stop control device 102 includes a start control terminal a and an engine shutdown control terminal b. The start trigger unit 105 includes a first normally open relay 201, with its two ends connected to the start detection positive terminal 1+ and the start detection negative terminal 1-, respectively. The control terminal of the first normally open relay 201 is connected to the start control terminal a via a connection module 130. The first normally open relay 201 is used to conduct according to the start control signal to generate a start trigger signal. The engine shutdown trigger unit 106 includes a second normally open relay 202, with its two ends connected to the engine shutdown detection positive terminal 2+ and the engine shutdown detection negative terminal 2-, respectively. The control terminal of the second normally open relay 202 is connected to the engine shutdown control terminal b via a connection module 130. The second normally open relay 202 is used to conduct according to the engine shutdown control signal to generate an engine shutdown trigger signal.

[0042] Specifically, one side of the control terminal of the first normally open relay 201 is connected to the start control terminal a via the connection module 130, and the other side of the control terminal of the first normally open relay 201 can be connected to the negative power supply V-. When the start control terminal a outputs a start control signal, the start control signal can cause the first normally open relay 201 to close via the control terminal of the first normally open relay 201, and then be introduced into the negative power supply V-. The start detection positive terminal 1+ and start detection negative terminal 1- of the vehicle control unit 101 detect a low-impedance start trigger signal when the first normally open relay 201 is closed, thereby controlling the engine to start. Similarly, one side of the control terminal of the second normally open relay 202 is connected to the stop control terminal b via the connection module 130, and the other side of the control terminal of the second normally open relay 202 can be connected to the negative power supply V-. When the stop control terminal b outputs a stop control signal, the stop control signal can cause the second normally open relay 202 to close via the control terminal of the second normally open relay 202, and then be introduced into the negative power supply V-. The engine shutdown detection positive terminal 2+ and negative terminal 2- of the vehicle control unit 101 detect a low-impedance shutdown trigger signal when the second normally open relay 202 is closed, thereby controlling the engine to shut down. The start-stop control device 102 may include a dual-position selector switch S1. The first position signal output interface of the dual-position selector switch S1 serves as the start control terminal a, and the second position signal output interface of the dual-position selector switch S1 serves as the shutdown control terminal b. The power interface of the dual-position selector switch S1 can be connected to the positive terminal V+ of the power supply. The driver can adjust the dual-position selector switch S1 to connect the positive terminal V+ of the power supply to either the first or second position signal output interface. The signal output interface connected to the positive terminal V+ of the power supply can output the corresponding control signal to achieve the closing of the normally open relay.

[0043] In the pre-set circuit provided in this embodiment, a first normally open relay and a second normally open relay are provided in the chassis circuit. The first normally open relay can close according to the start control signal output by the start-stop control device, so that the start detection positive and start detection negative terminals of the vehicle control unit detect a low-impedance start trigger signal, thereby controlling the engine to start. The second normally open relay can close according to the shutdown control signal output by the start-stop control device, so that the shutdown detection positive and shutdown detection negative terminals of the vehicle control unit detect a low-impedance shutdown trigger signal, thereby controlling the engine to shut down. This realizes the corresponding connection and control between the chassis circuit and the crane circuit. The two control terminals, the start control terminal and the shutdown control terminal, correspond to the control terminals of the first normally open relay and the second normally open relay, respectively, achieving a one-to-one correspondence. This avoids modification of the circuit composition during assembly, reduces the error rate during assembly, and further improves the reliability of the pre-set circuit.

[0044] Optionally, Figure 4 This is a schematic diagram of another preset circuit provided in an embodiment of the present invention, referring to... Figure 4 Based on the aforementioned embodiments, the lifting circuit 120 further includes lifting electrical equipment 301, and the undercarriage circuit 110 further includes an energy storage unit 302 and a main power switch S2. One end of the main power switch S2 is connected to the energy storage unit 302, and the other end of the main power switch S2 is connected to the lifting electrical equipment 301 via a connection module 130. The lifting circuit 120 also includes a protection unit Q, which is disposed between the main power switch S2 and the connection module 130. The protection unit Q is used to disconnect the line between the main power switch S2 and the connection module 130 when a power failure is detected in the line.

[0045] Specifically, lifting electrical equipment 301 refers to electrical components installed on lifting equipment. For example, lifting electrical equipment 301 may include indicator lights, screens, alarms, and any other electrical equipment installed on lifting equipment. Energy storage unit 302 refers to energy storage components installed on the undercarriage. For example, energy storage unit 302 may include an energy storage battery, a positive power terminal V+, and a negative power terminal V-. The main power switch S2 is a switch connected to the positive lead of energy storage unit 302. The positive terminals of all electrical appliances on the truck-mounted crane transport vehicle, except for normally powered equipment (such as the on-board control unit 101), are connected to the positive terminal of energy storage unit 302 via the main power switch S2. For example, the main power switch S2 may be a push-button switch or a toggle switch. The protection unit Q is a protective component used to prevent power supply failures in the lifting equipment 301. It can disconnect the power supply from the energy storage unit 302 to the lifting equipment 301 in the event of an overcurrent or overload fault. For example, the protection unit Q may include a fuse or a temperature-controlled circuit breaker. In addition to supplying power to the lifting equipment, the positive terminal V+ of the energy storage unit 302 is also connected to the power interface of the dual-position selector switch S1 via the main power switch S2 and the connection module 130. The negative terminal V- of the energy storage unit 302 is also connected to the control terminals of the first normally open relay 201 and the second normally open relay 202, respectively, to form a control signal loop.

[0046] The pre-set circuit provided in this embodiment also includes lifting electrical equipment in the lifting circuit, and the undercarriage circuit also includes an energy storage unit and a main power switch. The energy storage unit supplies power to the lifting electrical equipment through the main power switch and the connection module. When the transport vehicle is in a non-operational state, the driver can operate the main power switch to shut off the power supply path of the energy storage unit to electrical equipment other than the normally open equipment, so as to avoid the waste of the energy storage unit's power, reduce the situation where the power of the truck-mounted crane transport vehicle is exhausted and cannot start after long-term parking, and improve the power reliability of the truck-mounted crane transport vehicle.

[0047] Furthermore, in existing technologies, truck-mounted cranes require the engine to be in neutral to start. However, the inventors discovered that when a driver operates the crane, there is often a waiting period after a lift, during which the driver must wait for loading and unloading workers or machinery to move the next load. During this waiting time, continuous engine operation can waste a significant amount of fuel. Therefore, drivers tend to operate the start-stop control device to send a shutdown signal to turn off the engine and save fuel. However, when restarting the engine is needed, simply operating the start-stop control device is insufficient. This is because the engine was shut off in a non-neutral position, and it cannot be started directly in a non-neutral position. This requires assistance from other personnel, or the driver must climb down from the crane to the cab of the undercarriage to operate the equipment and then return to the crane, or ask other personnel to help operate it from the cab. This wastes time, increases the driver's workload, and may even lead to accidents due to other personnel's lack of understanding of vehicle operating rules.

[0048] To address these issues, alternatively, Figure 5 This is a schematic diagram of another preset circuit provided in an embodiment of the present invention, referring to... Figure 5 Based on the aforementioned embodiments, the chassis circuit 110 further includes a neutral simulation unit 501, a parking power take-off switch 502, a crane power take-off switch 503, and a parking brake switch 504. The parking power take-off switch 502 generates a first control signal to control the on / off state of the parking power take-off; the crane power take-off switch 503 generates a second control signal to control the on / off state of the crane power take-off; and the parking brake switch 504 generates a third control signal to control the on / off state of the parking brake. The neutral simulation unit 501 is connected to the vehicle control unit 101, the crane power take-off switch 503, the parking power take-off switch 502, and the parking brake switch 504. The neutral simulation unit 501 generates a neutral simulation signal when the first, second, and third control signals are all on signals. The vehicle control unit 101 controls the engine to start according to a start trigger signal when a neutral signal or a neutral simulation signal is detected.

[0049] The neutral gear simulation unit 501 refers to the neutral gear signal simulation component, which can generate a neutral gear simulation signal upon detecting the first, second, and third control signals. The neutral gear simulation signal simulates the neutral gear signal received by the vehicle control unit 101 in neutral mode, helping the chassis to start even when not in neutral. The parking power take-off (PTO) is a power output device that outputs power from the engine to the parking device; the parking PTO switch 502 controls the on / off state of the parking PTO. The parking device may include parking outriggers. The crane power take-off (PTO) is a power output device that outputs power from the engine to the lifting equipment; the crane PTO switch 503 controls the on / off state of the crane PTO. The parking brake switch 504 is the control switch for the chassis's parking brake device, also known as the handbrake.

[0050] Specifically, the vehicle control unit 101 includes a first neutral detection terminal 3+ and a second neutral detection terminal 3-. The neutral simulation unit 501 includes a third normally open relay 505 and a fourth normally open relay 506, which are connected in series between the first neutral detection terminal 3+ and the second neutral detection terminal 3-. The control terminal of the third normally open relay 505 is connected to the parking power take-off switch 502, and the third normally open relay 505 is used to close when a first control signal is detected. The control terminal of the fourth normally open relay 506 is connected to the crane power take-off switch 503 and the parking brake switch 504, respectively, and the fourth normally open relay 506 is used to close when a second control signal and a third control signal are detected. The neutral simulation unit 501 is used to generate a low-impedance neutral simulation signal when both the third normally open relay 505 and the fourth normally open relay 506 are closed.

[0051] For example, before lifting, the driver turns on the parking power take-off switch 502, the crane power take-off switch 503, and the parking brake switch 504 from the cab of the undercarriage. At this time, the parking outriggers are lowered, the handbrake is engaged, and the crane power take-off is activated, ensuring that the vehicle does not move when the undercarriage is started in non-neutral gear. Then, the driver climbs onto the lifting equipment to perform the lifting operation. While waiting, the driver can operate the start-stop control device 102 to send a shutdown control signal to shut down the engine and save fuel. When it is necessary to restart the engine, the driver only needs to operate the start-stop control device 102 to start the engine. Because the neutral simulation unit 501 continuously outputs a neutral simulation signal to the vehicle control unit 101, the vehicle control unit 101 can directly start the engine in non-neutral mode based on the start trigger signal when it detects the neutral simulation signal. This enables the engine to start in non-neutral mode during lifting. By associating the states of the parking power take-off switch 502, the crane power take-off switch 503, and the parking brake switch 504 with the neutral simulation signal, the safety of the vehicle can be ensured when starting in non-neutral mode, preventing accidental vehicle movement during neutral start-up. This allows the driver to start and stop the engine with peace of mind, saving energy and ensuring vehicle safety.

[0052] Optionally, Figure 6 This is a schematic diagram of another preset circuit provided in an embodiment of the present invention, referring to... Figure 6 Based on the aforementioned embodiments, the lifting circuit 120 includes a lifting throttle unit 601, which includes a start-stop control terminal 602 and a signal output terminal c. The lifting throttle unit 601 is used to generate a start-stop signal and output it through the start-stop control terminal 602, and to generate a throttle control signal and output it through the signal output terminal c. The undercarriage circuit 110 also includes a reserved throttle 603, which includes a functional start-stop terminal 604 and a signal access terminal d. The functional start-stop terminal 604 is connected to the start-stop control terminal 602 via a connection module 130, and the signal access terminal d is connected to the signal output terminal c via the connection module 130. The reserved throttle 603 is used to adjust the engine speed according to the throttle control signal when the start-stop signal includes start information.

[0053] The lifting throttle unit 601 refers to the throttle control component installed on the lifting equipment. Exemplarily, the lifting throttle unit 601 may include a start / stop switch, a pedal, and a position sensor installed on the pedal. The start / stop control terminal 602 of the lifting throttle unit 601 includes a positive control terminal 4+ and a negative control terminal 4-. The reserved throttle 603 may include an electronic throttle and its reserved interface (i.e., a functional start / stop terminal 604 and a signal access terminal d). The reserved throttle 603 can adjust the engine speed according to the throttle control signal when the start / stop signal includes start information. The functional start / stop terminal may include a positive start / stop terminal 5+ and a negative start / stop terminal 5-. The positive start / stop terminal 5+ is connected to the positive control terminal 4+ via a connection module 130, and the negative start / stop terminal 5- is connected to the negative control terminal 4- via a connection module 130.

[0054] Specifically, the lifting throttle unit 601 can generate a start-stop signal based on the operator's operation. When the start-stop signal includes stop information, the reserve throttle 603 does not receive the throttle control signal issued by the lifting throttle unit 601. When the start-stop signal includes start information, the reserve throttle 603 adjusts the engine speed according to the throttle control signal.

[0055] For example, before performing lifting operations, the operator needs to close the start-stop switch to generate a low-impedance start-stop signal between the positive control terminal 4+ and the negative control terminal 4-. Then, the operator can operate the pedal of the lifting throttle unit 601, and the position sensor can collect the pedal depth to generate a throttle control signal. After detecting the low-impedance start-stop signal, the reserved throttle 603 adjusts the engine speed or power according to the throttle control signal received at the signal input terminal d, thus achieving remote control of the engine power.

[0056] Optionally, Figure 7 This is a schematic diagram of another preset circuit provided in an embodiment of the present invention. Figure 8 This is a schematic diagram illustrating the composition of the plug-in surface of a connector provided in an embodiment of the present invention, in conjunction with... Figure 7 and Figure 8 Based on the aforementioned embodiments, the connection module 130 includes a connector 701 and a conductive slip ring 702.

[0057] Specifically, the lifting circuit 120 and the undercarriage circuit 110 can be connected by seven connecting wires, each of which passes through a connector 701 and a conductive slip ring 702. The seven connecting wires are, in order: the connection between the start trigger unit 105 and the start-stop control device 102; the connection between the stop trigger unit 106 and the start-stop control device 102; the connection between the positive terminal of the energy storage unit 302 and the positive terminal of the lifting equipment 301 via the main power switch S2; the connection between the negative terminal of the energy storage unit 302 and the negative terminal of the lifting equipment 301; the connection between the positive terminal of the functional start-stop terminal 604 of the reserved throttle 603 and the lifting throttle unit 601; the connection between the negative terminal of the functional start-stop terminal 604 of the reserved throttle 603 and the lifting throttle unit 601; and the connection between the signal input terminal d of the reserved throttle 603 and the lifting throttle unit 601. The connector 701 is positioned in the middle of each connecting wire. The connector 701 includes a chassis connection part 801 and a lifting connection part 802, with each interface of the chassis connection part 801 corresponding to the interface of the lifting connection part 802. The conductive slip ring 702 can be positioned either on the side of the connector 701 closer to the lifting circuit 120 or on the side of the connector 701 closer to the chassis circuit 110. The conductive slip ring 702 prevents wire tangling during the operation of the lifting equipment, while the connector 701 allows for one-time connection of the wires, avoiding the high workload and error rate of multiple connections. The conductive slip ring 702 can be an 8-channel conductive slip ring 702, with any extra channels left unused. The corresponding connector 701 can be an 8-interface connector 701, with any extra interfaces on the connector 701 fitted with sealing plugs for waterproofing.

[0058] This invention also provides a vehicle-mounted crane transport vehicle. Figure 9 This is a schematic diagram of the composition of a truck-mounted crane transport vehicle provided in an embodiment of the present invention, with reference to... Figure 9 The truck-mounted crane transport vehicle 900 includes any of the pre-set circuits 100 described in the embodiments of the present invention.

[0059] The vehicle-mounted crane and its pre-installed circuit provided in this embodiment have a one-to-one correspondence between the chassis circuit and the crane circuit. The start trigger unit and the shut-off trigger unit are respectively connected to different interfaces of the start-stop control device. The start trigger unit can generate a start trigger signal according to the start control signal to trigger the on-board control unit to start the engine. The shut-off trigger unit can generate a shut-off trigger signal according to the shut-off control signal to trigger the on-board control unit to shut down the engine. This achieves a one-to-one correspondence between the chassis circuit and the crane circuit. Furthermore, a connection module 130 is provided on the connection lines of the crane circuit and the chassis circuit. During assembly, only plugging is required to assemble the wiring, reducing reliance on the professional skills of assembly workers, lowering the assembly difficulty, and improving the reliability of the pre-installed circuit.

[0060] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A pre-installed circuit for a truck-mounted crane, characterized in that, The preset circuit includes a chassis circuit, a lifting circuit, and a connection module. The lifting circuit includes a start-stop control device, which is used to generate a start control signal or a shutdown control signal. The chassis circuit includes a start trigger unit, a stop trigger unit, and an on-board control unit. The stop trigger unit and the start trigger unit are respectively connected to the start-stop control device. The start trigger unit is used to generate a start trigger signal based on the start control signal, and the stop trigger unit is used to generate a stop trigger signal based on the stop control signal. The on-board control unit includes a start detection positive terminal, a start detection negative terminal, a stop detection positive terminal, and a stop detection negative terminal. The start-stop control device includes a start control terminal and a stop control terminal. The start trigger unit includes a first normally open relay, the two ends of which are... The first normally open relay is connected to the positive and negative terminals of the start detection, respectively. Its control terminal is connected to the start control terminal via the connection module. The first normally open relay is used to conduct according to the start control signal to generate the start trigger signal. The flameout trigger unit includes a second normally open relay. The two ends of the second normally open relay are connected to the positive and negative terminals of the flameout detection, respectively. Its control terminal is connected to the flameout control terminal via the connection module. The second normally open relay is used to conduct according to the flameout control signal to generate the flameout trigger signal. The chassis circuit also includes a neutral simulation unit, a parking power take-off switch, a crane power take-off switch, and a parking brake switch. The parking power take-off switch generates a first control signal to control the on / off state of the parking power take-off, the crane power take-off switch generates a second control signal to control the on / off state of the crane power take-off, and the parking brake switch generates a third control signal to control the on / off state of the parking brake. The neutral simulation unit is connected to the vehicle control unit, the crane power take-off switch, the parking power take-off switch, and the parking brake switch. The neutral simulation unit generates a neutral simulation signal when the first control signal, the second control signal, and the third control signal are all on signals. The vehicle control unit controls the engine to start according to the start trigger signal when the neutral signal or the neutral simulation signal is detected. The vehicle control unit is connected to the engine shutdown trigger unit and the engine start trigger unit respectively. The vehicle control unit is used to control the engine to start according to the engine start trigger signal and control the engine to shut down according to the engine shutdown trigger signal. The connection module is located between the undercarriage circuit and the lifting circuit, and is used to control the disconnection or connection of the corresponding lines between the undercarriage circuit and the lifting circuit.

2. The pre-installed circuit of the truck-mounted crane transport vehicle according to claim 1, characterized in that, The start / stop control device also includes a two-position selector switch, wherein the first position signal output interface of the two-position selector switch serves as the start control terminal, and the second position signal output interface of the two-position selector switch serves as the shut-off control terminal.

3. The pre-installed circuit of the truck-mounted crane transport vehicle according to claim 1, characterized in that, The lifting circuit also includes lifting electrical equipment, and the undercarriage circuit also includes an energy storage unit and a main power switch. One end of the main power switch is connected to the energy storage unit, and the other end of the main power switch is connected to the lifting electrical equipment via the connection module.

4. The pre-installed circuit of the truck-mounted crane transport vehicle according to claim 3, characterized in that, The lifting circuit also includes a protection unit, which is located between the main power switch and the connection module. The protection unit is used to disconnect the line between the main power switch and the connection module when a power failure is detected on the line.

5. The pre-installed circuit of the truck-mounted crane transport vehicle according to claim 1, characterized in that, The lifting circuit includes a lifting throttle unit, which includes a start / stop control terminal and a signal output terminal. The lifting throttle unit is used to generate a start / stop signal and output it through the start / stop control terminal, and to generate a throttle control signal and output it through the signal output terminal. The chassis circuit also includes a reserved throttle, which includes a function start / stop terminal and a signal input terminal. The function start / stop terminal is connected to the start / stop control terminal via the connection module, and the signal input terminal is connected to the signal output terminal via the connection module. The reserved throttle is used to adjust the engine speed according to the throttle control signal when the start / stop signal includes start information.

6. The pre-installed circuit of the truck-mounted crane transport vehicle according to claim 1, characterized in that, The vehicle control unit includes a first neutral detection terminal and a second neutral detection terminal; The neutral simulation unit includes a third normally open relay and a fourth normally open relay, which are connected in series between the first neutral detection terminal and the second neutral detection terminal. The control terminal of the third normally open relay is connected to the parking power take-off switch. The third normally open relay is used to close when the first control signal is detected. The control terminal of the fourth normally open relay is connected to the crane power take-off switch and the parking brake switch respectively. The fourth normally open relay is used to close when the second control signal and the third control signal are detected. The neutral simulation unit is used to generate the neutral simulation signal when both the third normally open relay and the fourth normally open relay are closed.

7. The pre-installed circuit of the truck-mounted crane transport vehicle according to claim 1, characterized in that, The connection module includes a connector and a conductive slip ring.

8. A truck-mounted crane transport vehicle, characterized in that, Includes the preset circuit described in any one of claims 1-7.

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