Maintenance lighting system and excavator

Abstract

The maintenance lighting system comprises a second power supply loop, a power supply, a power main switch, a first power supply loop and a maintenance lamp loop, the power supply, the power main switch, the first power supply loop and the maintenance lamp loop are connected in series, and the second power supply loop comprises a maintenance mode power switch and a diode; the maintenance mode power switch is connected in series between the power supply and the power supply end of the maintenance lamp loop through a lead; the anode of the diode is connected with the first power supply loop through a wire, and the cathode of the diode is connected with the power supply end of the maintenance lamp loop and the power supply end of the second power supply loop, thereby forming a control relation that the first and second power supply loops simultaneously supply power to the maintenance lamp loop and the second power supply loop cannot supply power to the first power supply loop. According to the utility model, by additionally arranging the maintenance lighting second power supply loop and the independent wire harness connecting structure, the excavator maintenance lighting system can still be used after the power supply main switch is switched off, so that the excavator maintenance lighting system is applicable to an electrical fault maintenance scene, and the maintenance convenience is improved.

Description

Technical Field

[0001] This utility model relates to a maintenance lighting system and belongs to the field of excavator technology. Background Technology

[0002] Currently, most large excavators are equipped with maintenance lighting devices to provide illumination for maintenance personnel in environments with poor visibility, facilitating maintenance work. However, in actual use, since the power supply is controlled by the main power switch, the lighting system cannot be used when maintenance personnel are inspecting electrical system components and turning off the excavator's main power switch. Maintenance personnel usually bring their own lighting for electrical fault repair work.

[0003] Problems with existing technology: When it is necessary to inspect the circuit of an excavator, it is generally necessary to disconnect the main power switch before the circuit test is performed. At this time, the excavator's maintenance lighting system cannot work because there is no power supply. That is, the maintenance lighting device cannot be used in scenarios that require power-off operation, such as when inspecting the electrical system. Maintenance personnel can only carry out electrical fault repair work by using their own lights.

[0004] The above technical problems arise because the lighting system circuit is not isolated from the circuits of conventional electrical equipment, making it impossible to supply or disconnect power independently. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a maintenance lighting system for large excavators. By adding a second power supply circuit for maintenance lighting and an independent wiring harness connection structure, the excavator maintenance lighting system can still be used after the main power switch is turned off, thus achieving applicability to electrical fault maintenance scenarios and improving maintenance convenience.

[0006] This utility model is achieved according to the following technical solution:

[0007] In a first aspect, this utility model provides a maintenance lighting system, including a second power supply circuit and a power supply, a main power switch, a first power supply circuit, and a maintenance lamp circuit connected in series. The second power supply circuit includes:

[0008] The maintenance mode power switch is connected in series between the power supply and the power supply terminal of the maintenance lamp circuit via a wire. After the main power switch is turned off, the maintenance mode power switch is used to control the on / off of the maintenance lamp circuit independently.

[0009] The diode has its anode connected to the first power supply circuit via a wire, and its cathode connected to the power supply terminals of the maintenance lamp circuit and the second power supply circuit, forming a control relationship in which the first and second power supply circuits simultaneously supply power to the maintenance lamp circuit, while the second power supply circuit cannot supply power to the first power supply circuit.

[0010] In some embodiments, at least one fuse for circuit protection is connected in series in the second power supply circuit.

[0011] In some embodiments, the fuses in the second power supply circuit are all installed in the same fuse box, which is independent of the fuse box in the first power supply circuit.

[0012] In some embodiments, a movable maintenance lamp power outlet is connected in parallel at the maintenance lamp position in the maintenance lamp circuit, so that other lighting devices can draw power at that position to provide lighting for maintenance personnel.

[0013] In some embodiments, a circuit status indicator light is connected in parallel at the location of the inspection light in the inspection light circuit, and the circuit status indicator light is installed at the location of the main power switch or the personnel boarding / alighting passage to prevent the power switch of the inspection mode from not being turned off in time.

[0014] In some embodiments, the power supply terminal of the maintenance lamp circuit is connected in parallel to the vehicle controller port. The vehicle controller port has a voltage monitoring function. The controller determines the status of the maintenance lighting system by monitoring the port voltage and sends a signal to remind the driver to prevent the maintenance mode power switch S2 from not being turned off in time.

[0015] In some embodiments, a maintenance lamp switch is connected in series in the maintenance lamp circuit of the maintenance lamp circuit, which can independently control the on / off state of the maintenance lamp circuit.

[0016] In some embodiments, at least one fuse for circuit protection is connected in series in the inspection lamp circuit of the inspection lamp line.

[0017] In some embodiments, the wiring harness connection points in the first power supply circuit are connected via a first wiring harness connection plug, and the wiring harness connection points in the second power supply circuit are connected via a second wiring harness connection plug; the first wiring harness connection plug and the second wiring harness connection plug have different shapes and sizes.

[0018] Secondly, this utility model provides an excavator, including the aforementioned maintenance lighting system.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a maintenance lighting system for large excavators. Compared to conventional excavator maintenance lighting systems, it adds a maintenance mode power switch and diodes, which are connected in sequence to form a second power supply circuit for the maintenance lamp. This allows the maintenance lamp to have two power supply circuits simultaneously. The system can be used normally when the main power switch is on, or the maintenance mode power switch can be used to control the power supply of the maintenance lighting system after the main power switch is off, without affecting the power supply of conventional electrical components on the machine. This makes it suitable for excavator electrical fault repair scenarios. Additionally, the maintenance lighting system can be equipped with a maintenance lighting system operation indicator to prevent issues if the maintenance mode power switch is not turned off in time. Furthermore, in the internal connection position of the wiring harness of this maintenance lighting system, the wires in the second power supply circuit are independently connected to the wires in the conventional electrical equipment power supply circuit through an internal connector, and are clearly marked. They can be plugged and unplugged separately when troubleshooting circuit faults without affecting the power supply of the maintenance lighting system, facilitating personnel in troubleshooting circuit faults. Attached Figure Description

[0021] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0022] In the attached diagram:

[0023] Figure 1 This is a circuit diagram of a standard excavator maintenance lighting system.

[0024] Figure 2 This is a circuit diagram of the excavator maintenance lighting system of this utility model;

[0025] Figure 3 This is a schematic diagram of the internal connection arrangement of the wire harness of this utility model;

[0026] Figure 4 This is a schematic diagram showing the arrangement of the electrical components of this utility model;

[0027] Figure 5 This is a schematic diagram of the inspection lamp and the arrangement of the power supply port for the inspection lamp according to this utility model.

[0028] Attached diagram labels: Battery G1 / G2, Main power switch S1, Maintenance mode power switch S2, Maintenance light switch S3, Constant power copper busbar T1, Key power copper busbar T2, Battery positive busbar T3, Battery negative busbar T4, Constant power main fuse F01, Key power fuse F02, Maintenance circuit 1 fuse F03, Maintenance circuit 2 fuse F04, Maintenance light group 1 fuse F101, Maintenance light group 2 fuse F102, Maintenance status signal fuse F103, Power relay K1, Maintenance signal relay K101, Diode V1, Maintenance light E1 / E2, Circuit status indicator light E3, Mobile maintenance light power input port X1.

[0029] 1. Battery pack; 2. Battery positive busbar; 3. Battery negative busbar; 4. Main power switch; 5. Constant power busbar; 6. Key power busbar; 7. Wiring harness; 8. Maintenance mode power switch; 9. Fuse box; 10. Circuit status indicator light; 11. Connecting plugs in the wiring harness of common electrical components; 12. Connecting plugs in the wiring harness of the second power supply circuit of the maintenance lighting system; 13. Maintenance lamp; 14. Power outlet for the portable maintenance lamp.

[0030] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Figure 1 A circuit diagram of a conventional excavator maintenance lighting system is provided, including batteries G1 and G2, a main power switch S1, maintenance lights E1 and E2, a maintenance light switch S3, a constant power bus T1, a key power bus T2, a battery positive bus T3, a battery negative bus T4, and connecting wiring harnesses. Multiple batteries are connected in series and parallel. The positive terminal is connected to the battery positive bus T3, and the negative terminal is connected to the battery negative bus T4. The battery positive bus T3 and the constant power bus T1 are connected through the main power switch S1. The battery negative bus T4 is connected to the excavator's metal body through the main power switch S1. The constant power bus T1 and the key power bus T2 are connected through the normally open contact of the power relay K1. The on / off state of the power relay K1 coil circuit is controlled by the key switch signal. The main power switch S1 is used to switch the power supply on and off. When the main power switch S1 is turned on, the constant voltage copper busbar T1 is energized. When the key switch is turned on, the coil of the power relay K1 is energized, and the normally open contact closes and conducts, energizing the key voltage copper busbar T2. The constant voltage or key voltage is connected to the maintenance light switch and the maintenance light through the wiring harness. The negative terminal of the maintenance light is connected to the metal body of the excavator, forming the first power supply circuit of the maintenance lighting system. The connection relationship of this circuit and the power supply control logic of the maintenance light are described in reference [reference needed]. Figure 1 The maintenance lamp can be powered by a constant-voltage copper busbar or by a key-operated copper busbar. The maintenance lamp switch can be directly controlled by the switch or indirectly controlled by the maintenance lamp signal. The fundamental characteristic of this first power supply circuit is that its operation is controlled by the main power switch.

[0035] Based on the above basic lighting circuit, this maintenance lighting system also has a second power supply circuit, see reference. Figure 2 As shown, the connection structure of the second power supply circuit is as follows: the positive power supply busbar T3 is connected to one end of the normally open contact of the maintenance mode power switch S2. The other end of the normally open contact is connected to the power supply terminals of maintenance lamps E1 and E2. The maintenance lamp power supply terminal is connected to the first power supply circuit through diode V1. The positive terminal of diode V1 is connected to the first power supply circuit, and the negative terminal of diode V1 is connected to the power supply terminal of the maintenance lamp and the power supply terminal of the second power supply circuit. This forms a logical relationship in which the first power supply circuit and the second power supply circuit supply power to the maintenance lamp simultaneously, but the second power supply circuit cannot supply power to the first power supply circuit. The maintenance lamp circuit can be protected by a fuse (i.e., the maintenance lamp group 1 fuse F101 and maintenance lamp group 2 fuse F102 in the attached figure). The maintenance lamp circuit can also be equipped with a maintenance lamp switch S3 to control the on / off of the maintenance lamp circuit separately. The grounding terminal of the inspection lamp is connected to the metal body of the excavator and then to the negative power busbar T4 via the main power switch S1. Simultaneously, it is also connected to the negative power busbar T4 via the second set of normally open contacts of the maintenance mode power switch S2. The on / off state of this second power supply circuit is controlled by the maintenance mode power switch S2, but not by the main power switch S1.

[0036] With the above circuit structure, the maintenance lighting system can be used normally when the main power switch S1 is open, and the maintenance mode power switch S2 can be used to control the power supply of the maintenance lighting system after the main power switch S1 is closed, without affecting the power supply of the conventional electrical components of the whole machine.

[0037] A further solution involves the wire-to-wire connector insertion position (hereinafter referred to as the internal connection position of the wire harness) provided in wire harness 7 for easy assembly and disassembly, as referenced. Figure 3 The conventional electrical component wiring harness internal connection plug 11 and the maintenance lighting system second power supply circuit wiring harness internal connection plug 12 are provided. The wires in the second power supply circuit are independently connected to the conventional electrical equipment power supply circuit wires through different internal connection plugs and are clearly marked. They can be plugged and unplugged separately when troubleshooting circuit faults without affecting the power supply to the maintenance lighting system, making it convenient for personnel to troubleshoot excavator circuit faults.

[0038] A further option is to add a maintenance lighting system operation indicator device 1, namely, a status indicator light E3 connected in parallel at both ends of the maintenance light. The status indicator light E3 is installed near the main power switch S1 or in the personnel boarding / alighting area, and has a clearly visible function marking. When the maintenance mode power switch S2 is turned on, the maintenance lighting circuit status indicator light E3 is activated; when the maintenance mode power switch S2 is turned off, the maintenance lighting circuit status indicator light E3 is deactivated. When the driver is about to leave, this status indicator light can directly display the on / off status of the maintenance lighting system to remind the driver, preventing the maintenance mode power switch from being left on in a timely manner.

[0039] A further solution is to add a maintenance lighting system operation indicator device 2 to the maintenance lighting system. That is, the power supply terminal of the maintenance lighting lamp is connected in parallel to the excavator controller port. The excavator controller port has a voltage monitoring function. When the driver is about to drive the excavator or disconnect the power to the excavator, the controller judges the status of the maintenance lighting system by monitoring the port voltage and sends a signal to remind the driver to prevent the maintenance mode power switch S2 from not being disconnected in time.

[0040] Example of electrical component layout for an excavator equipped with the above-mentioned maintenance lighting system, see reference. Figure 4 and Figure 5 The positive terminal of battery pack 1 is connected to the positive busbar 2, and its negative terminal is connected to the negative busbar 3. The positive busbar 2 and the constant power busbar 5 are connected via the main power switch 4. The negative busbar 3 is connected to the excavator's metal body via the main power switch 4. The constant power busbar 5 and the key power busbar 6 are connected via relevant wiring harnesses and electrical components. (See reference for connection details.) Figure 2 This forms the first power supply circuit for the maintenance lighting system. Based on the above basic circuit's electrical component layout, a maintenance mode power switch 8, diode V1, and circuit status indicator light 10 are added, and... Figure 2 The circuit connections form the second power supply circuit for the inspection lamp, wherein:

[0041] Even better, each circuit in the electrical system is equipped with a fuse to protect the circuit, and all fuses involved in the second power supply circuit are installed in the same fuse box 9.

[0042] Even better, this fuse box 9 is independent of the conventional electrical component circuit fuse box of the excavator, allowing for independent operation when inspecting the excavator's circuits, which facilitates troubleshooting.

[0043] Even better, a portable inspection lamp power take-off port 14 can be connected in parallel to the circuits at both ends of the inspection lamp 13 and installed at a suitable location on the excavator, for reference. Figure 5 As shown, if the visibility is poor when using the inspection lamp, other lighting devices can be used to draw power from the location to provide illumination for the maintenance personnel.

[0044] In summary, this utility model provides a maintenance lighting system for large excavators. Compared to conventional excavator maintenance lighting systems, it adds a maintenance mode power switch and diodes, which are connected in sequence to form a second power supply circuit for the maintenance lamp. This allows the maintenance lighting lamp to have two power supply circuits simultaneously. The maintenance lighting system can be used normally when the main power switch is on, or the maintenance mode power switch can be used to control the power supply of the maintenance lighting system after the main power switch is off, without affecting the power supply of conventional electrical components of the machine. This makes it applicable to electrical fault repair scenarios for excavators. Furthermore, the maintenance lighting system can be equipped with a maintenance lighting system operation indicator to prevent issues if the maintenance mode power switch is not turned off in time. Additionally, at the internal connection position of the wiring harness of this maintenance lighting system, the wires in the second power supply circuit are independently connected to the wires in the conventional electrical equipment power supply circuit through an internal connection plug, and are clearly marked. They can be plugged and unplugged separately when troubleshooting circuit faults without affecting the power supply of the maintenance lighting system, facilitating personnel in troubleshooting circuit faults.

[0045] The excavator provided by this utility model is described below. The excavator described below can be referred to in correspondence with the maintenance lighting system described above.

[0046] The excavator provided by this utility model may include a maintenance lighting system as described in any of the above embodiments.

[0047] The beneficial effects achieved by the excavator provided by this utility model are consistent with the beneficial effects achieved by the maintenance lighting system provided by this utility model, so they will not be repeated here.

[0048] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0049] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A maintenance lighting system, comprising a power supply, a main power switch, a first power supply circuit, and a maintenance lamp circuit connected in series, characterized in that, It also includes a second power supply circuit, which includes: The maintenance mode power switch is connected in series between the power supply and the power supply terminal of the maintenance lamp circuit via a wire. After the main power switch is turned off, the maintenance mode power switch is used to control the on / off of the maintenance lamp circuit independently. The diode has its anode connected to the first power supply circuit via a wire, and its cathode connected to the power supply terminals of the maintenance lamp circuit and the second power supply circuit, forming a control relationship in which the first and second power supply circuits simultaneously supply power to the maintenance lamp circuit, while the second power supply circuit cannot supply power to the first power supply circuit.

2. The maintenance lighting system according to claim 1, characterized in that: At least one fuse is connected in series in the second power supply circuit to protect the circuit.

3. A maintenance lighting system according to claim 2, characterized in that: The fuses in the second power supply circuit are all installed in the same fuse box, which is independent of the fuse box in the first power supply circuit.

4. A maintenance lighting system according to claim 1, characterized in that: A portable maintenance lamp power outlet is connected at the maintenance lamp location in the maintenance lamp circuit, so that other lighting devices can draw power at that location to provide lighting for maintenance personnel.

5. A maintenance lighting system according to claim 1, characterized in that: A circuit status indicator light is connected in parallel at the location of the inspection light in the inspection light circuit, and the circuit status indicator light is installed at the location of the main power switch or the personnel boarding / alighting passage to prevent the power switch of the inspection mode from not being turned off in time.

6. A maintenance lighting system according to claim 1, characterized in that: The power supply terminal of the maintenance lamp circuit is connected in parallel to the vehicle controller port. The vehicle controller port has a voltage monitoring function. The controller judges the status of the maintenance lighting system by monitoring the port voltage and sends a signal to remind the driver to prevent the maintenance mode power switch S2 from not being turned off in time.

7. A maintenance lighting system according to claim 1, characterized in that: The inspection lamp circuit has an inspection lamp switch connected in series in the inspection lamp line, which can independently control the on / off state of the inspection lamp circuit.

8. A maintenance lighting system according to claim 1, characterized in that: At least one fuse is connected in series in the inspection lamp circuit to protect the circuit.

9. A maintenance lighting system according to claim 1, characterized in that: The wiring harness connection in the first power supply circuit is via a first wiring harness connection plug, and the wiring harness connection in the second power supply circuit is via a second wiring harness connection plug; the first wiring harness connection plug and the second wiring harness connection plug have different shapes and sizes.

10. An excavator, characterized in that: Includes the maintenance lighting system as described in any one of claims 1 to 9.

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