Standby starting circuit for micro excavation

Abstract

The utility model relates to the field of engineering machinery, in particular to a standby starting circuit for micro excavation, which comprises a control instrument, a starter and a power supply, the starter is connected with the power supply to form a power supply loop, and the standby starting circuit further comprises a one-key starting switch used for outputting starting signals to the control instrument and electrically connected with the control instrument and the power supply. The control instrument is electrically connected with the control end of the starter and outputs a starting control signal to the starter, the standby starting switch is used for outputting a standby starting signal to the control instrument, the standby starting switch is electrically connected with the control instrument and the power supply, and the control end of the starter is connected with the power supply to form a power supply loop. And a normally open contact of the starting relay is arranged on the power supply loop. According to the standby starting circuit for the micro-excavation, starting of the starter can be achieved through the standby starting switch, it is ensured that the micro-excavation can be started smoothly and continue to work, the reliability and usability of the starting circuit are remarkably improved, and the use requirement under the complex engineering environment is met.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a standby starting circuit for a micro excavator. Background Art

[0002] With the continuous development of modern engineering machinery technology, mini excavators, as an important type of engineering machinery, are widely used in the fields of construction, municipal administration, gardening, etc. The starting system of a mini excavator is one of its key components, responsible for providing the necessary power to start the engine. However, in a complex engineering environment, the starting system may fail for various reasons, such as failure of the one-button start switch, unstable power supply, etc., resulting in the mini excavator being unable to start smoothly, which in turn affects the project progress and operating efficiency.

[0003] At present, the mini excavators with cabs are used in harsh environments because the one-button start switch is directly exposed to the outside environment and is easily damaged, resulting in the problem that the vehicle cannot be started. The backup start circuits equipped with some mini excavators on the market are not flexible enough in the connection between the backup start switch and the control instrument, and cannot realize the flexible switching of multiple start modes; some backup start circuits are not well designed in terms of circuit protection, and cannot effectively avoid the damage to the mini excavators caused by circuit failures, which needs to be improved. Utility Model Content

[0004] The utility model aims to provide a standby starting circuit for a micro excavator which can start a starter through a standby starting switch in view of the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses a backup starting circuit for a micro excavator, including a control instrument, a starter and a power supply. The starter is connected to the power supply to form a power supply circuit. Its structural characteristics are: it also includes a one-button starting switch for outputting a starting signal to the control instrument, the one-button starting switch is electrically connected to the control instrument and the power supply, the control instrument is electrically connected to the control end of the starter and outputs a starting control signal to it, and also includes a backup starting switch for outputting a backup starting signal to the control instrument, the backup starting switch is electrically connected to the control instrument and the power supply.

[0006] The one-button start switch is used for normal vehicle start, and the start operation can be completed on the switch; the backup start switch is only used for backup start after the one-button start switch is damaged. To prevent misoperation, after the backup start switch is pressed, the instrument backup switch port receives a high level, and the instrument interface will pop up a start prompt message to complete the start operation on the instrument. As a central control unit, the control instrument can receive the start signal from the one-button start switch and convert it into a start control signal to drive the starter to start the engine. The backup start switch provides an additional starting method. When the one-button start switch fails, the operator can start the engine through the backup start switch, ensuring the reliability of the starting circuit. The backup starting circuit should be able to start the starter through the backup start switch when the one-button start switch or power supply fails, ensuring that the mini excavator can start smoothly and continue to work, significantly improving the reliability and availability of the starting circuit, and meeting the use requirements in complex engineering environments.

[0007] It also includes a starter relay. The control end of the starter is connected to the power supply to form a power supply circuit. The normally open contact of the starter relay is installed on the power supply circuit. The starter relay is used to control the power supply circuit of the starter. By controlling the on and off of the normally open contact, the starter can be started and stopped, which enhances the safety and reliability of the circuit.

[0008] One end of the coil of the starter relay is grounded, and the other end is electrically connected to the control instrument. This connection method enables the control instrument to indirectly control the action of the starter relay by controlling the current of the coil, thereby realizing remote control.

[0009] A first fuse is connected in series to the power supply circuit of the starter control end. The first fuse plays an overcurrent protection role. When an abnormal current appears in the circuit, the fuse will melt and cut off the circuit to prevent damage to circuit components and equipment.

[0010] A second fuse is connected in series on the connection line of the one-touch start switch. The second fuse is used to protect the one-touch start switch and its related circuits from damage caused by short circuit or overload.

[0011] The connection line of the standby start switch is connected in series with a third fuse, which is used to protect the standby start switch and its related circuits, ensuring that the standby start switch can work normally in an emergency.

[0012] The negative pole of the power supply is connected to the vehicle body, and a power switch is installed on the connection line between the power supply and the vehicle body. The power switch is convenient for operators to control the on and off of the power supply. At the same time, the negative pole of the power supply connected to the vehicle body can provide a stable reference potential and enhance the stability of the circuit.

[0013] The standby start switch and the one-button start switch are connected to different ports of the control instrument respectively, ensuring that the vehicle can still start normally when one of the port lines fails.

[0014] In summary, the beneficial effect of the utility model is that the control instrument, as a central control unit, can receive the start signal from the one-button start switch and convert it into a start control signal to drive the starter to start the engine. The backup start switch provides an additional starting method. When the one-button start switch fails, the operator can start the engine through the backup start switch, ensuring the reliability of the starting circuit. The backup starting circuit should be able to start the starter through the backup start switch when the one-button start switch or power supply fails, ensuring that the micro-excavator can start smoothly and continue to work, significantly improving the reliability and availability of the starting circuit, and meeting the use requirements in complex engineering environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the circuit structure of the utility model.

[0016] In the figure: control instrument 1, start relay 2, starter 3, standby start switch 4, one-button start switch 5, power switch 6, power supply 7, first fuse 8, second fuse 9, third fuse 10. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0022] A backup starting circuit for a micro excavator includes a control instrument 1, a starter 3 and a power supply 7. The starter 3 is connected to the power supply 7 to form a power supply circuit. It also includes a one-touch start switch 5 for outputting a start signal to the control instrument 1. The one-touch start switch 5 is electrically connected to the control instrument 1 and the power supply 7. The control instrument 1 is electrically connected to the control end of the starter 3 and outputs a start control signal to it. It also includes a backup start switch 4 for outputting a backup start signal to the control instrument 1. The backup start switch 4 is electrically connected to the control instrument 1 and the power supply 7. Figure 1 ,

[0023] The one-button start switch 5 is used for normal vehicle start, and the start operation can be completed on the switch; the standby start switch 4 is only used for standby start after the one-button start switch 5 is damaged. To prevent misoperation, after the standby start switch 4 is pressed, the instrument standby switch port receives a high level, and the instrument interface will pop up a start prompt message to complete the start operation on the instrument. The control instrument 1, as a central control unit, can receive the start signal from the one-button start switch 5 and convert it into a start control signal to drive the starter 3 to start the engine. The standby start switch 4 provides an additional start mode. When the one-button start switch 5 fails, the operator can start the engine through the standby start switch 4, ensuring the reliability of the starting circuit. The standby starting circuit should be able to start the starter 3 through the standby start switch 4 when the one-button start switch 5 or the power supply 7 fails, ensuring that the micro-excavator can start smoothly and continue to work, significantly improving the reliability and availability of the starting circuit, and meeting the use requirements in complex engineering environments.

[0024] See attached Figure 1, and also includes a starter relay 2. The control end of the starter 3 is connected to the power supply 7 to form a power supply circuit, and the normally open contact of the starter relay 2 is installed on the power supply circuit. The starter relay 2 is used to control the power supply circuit of the starter 3. The start and stop control of the starter 3 is achieved by controlling the on and off of the normally open contact, thereby enhancing the safety and reliability of the circuit. One end of the coil of the starter relay 2 is grounded, and the other end is electrically connected to the control instrument 1. This connection method enables the control instrument 1 to indirectly control the action of the starter relay 2 by controlling the current of the coil, thereby realizing remote control.

[0025] See attached Figure 1 A first fuse 8 is connected in series to the power supply circuit of the control end of the starter 3. The first fuse 8 plays an overcurrent protection role. When an abnormal current appears in the circuit, the fuse will melt and cut off the circuit to prevent damage to circuit components and equipment. A second fuse 9 is connected in series to the connection line of the one-touch start switch 5. The second fuse 9 is used to protect the one-touch start switch 5 and its related circuits from damage caused by short circuit or overload. A third fuse 10 is connected in series to the connection line of the standby start switch 4. The function of the third fuse 10 is to protect the standby start switch 4 and its related circuits to ensure that the standby start switch 4 can work normally in an emergency.

[0026] The negative pole of the power source 7 is connected to the vehicle body, and a power switch 6 is installed on the connection line between the power source 7 and the vehicle body. The power switch 6 is convenient for the operator to control the on and off of the power source 7. At the same time, the negative pole of the power source 7 connected to the vehicle body can provide a stable reference potential and enhance the stability of the circuit. The standby start switch 4 and the one-button start switch 5 are respectively connected to different ports of the control instrument 1. It is ensured that when one of the port lines fails, the vehicle can still start normally.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A backup starting circuit for a micro excavator, comprising a control instrument (1), a starter (3) and a power supply (7), wherein the starter (3) is connected to the power supply (7) to form a power supply circuit, characterized in that: The device also includes a one-touch start switch (5) for outputting a start signal to the control instrument (1), the one-touch start switch (5) being electrically connected to the control instrument (1) and a power supply (7), the control instrument (1) being electrically connected to a control end of the starter (3) and outputting a start control signal thereto, and also includes a standby start switch (4) for outputting a standby start signal to the control instrument (1), the standby start switch (4) being electrically connected to the control instrument (1) and the power supply (7).

2. The backup starting circuit for micro excavation according to claim 1, characterized in that: It also includes a starting relay (2), a control end of the starter (3) is connected to a power supply (7) to form a power supply circuit, and a normally open contact of the starting relay (2) is installed on the power supply circuit.

3. The backup starting circuit for micro excavation according to claim 2, characterized in that: One end of the coil of the starter relay (2) is grounded, and the other end is electrically connected to the control instrument (1).

4. The backup starting circuit for micro excavation according to claim 2, characterized in that: A first fuse (8) is connected in series to the power supply circuit of the control end of the starter (3).

5. The backup starting circuit for micro excavation according to claim 1, characterized in that: A second fuse (9) is connected in series on the connection line of the one-touch start switch (5).

6. The backup starting circuit for micro excavation according to claim 1, characterized in that: A third fuse (10) is connected in series on the connection line of the standby starting switch (4).

7. The backup starting circuit for micro excavation according to claim 1, characterized in that: The negative pole of the power source (7) is connected to the vehicle body, and a power switch (6) is installed on the connection line between the power source (7) and the vehicle body.

8. The backup starting circuit for micro excavation according to claim 1, characterized in that: The standby start switch (4) and the one-touch start switch (5) are respectively connected to different ports of the control instrument (1).

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