Miniaturized power distribution circuit of storage battery relay for excavator

Abstract

The utility model relates to the field of engineering machinery, in particular to a miniaturized power distribution circuit of a storage battery relay for an excavator, which comprises a key switch, a power supply and a load relay connected with the power supply to form a power supply loop, and is structurally characterized by further comprising the storage battery relay, a coil end of the storage battery relay is connected with a power supply to form a power supply loop, the key switch is installed on the power supply loop of the storage battery relay, and a normally open switch of the storage battery relay is installed on a coil loop of the load relay. A normally-open switch of the high-low speed relay is installed on a power supply loop of the high-low speed electromagnetic valve, and a switch can be independently installed on the power supply loop of the high-low speed electromagnetic valve. According to the miniaturized power distribution circuit of the storage battery relay for the excavator, the storage battery relay with smaller over-current capability and smaller volume can be used under the condition of the same load power of the whole machine, so that the integrated arrangement is facilitated, the cost is reduced, and the service life of the relay can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a miniaturized power distribution circuit of a battery relay for an excavator. Background Art

[0002] An excavator is a type of engineering machinery widely used in earthwork construction. A bucket is provided on the front side of the excavator, and the bucket is connected to the excavator through a boom and an arm. A bucket cylinder for controlling the movement of the bucket is installed at the front end of the boom, and an arm cylinder for controlling the movement of the arm is installed on the upper part of the boom. In addition, a boom cylinder for controlling the movement of the boom is also installed on the excavator. The movement of the bucket is controlled by the bucket cylinder, and the extension and retraction of the boom cylinder and the arm cylinder control the excavation, loading and other actions of the bucket.

[0003] Existing excavators are usually equipped with battery relays that are large in size and have an overcurrent capacity of more than 100A. All controlled (ACC) electricity passes through the battery relay, which has a large load. In order to meet the overcurrent requirements, the cost is high, and the large size makes it inconvenient for integrated layout, which needs to be improved. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a miniaturized power distribution circuit of a battery relay for an excavator with high integration.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses a miniaturized power distribution circuit of a battery relay for an excavator, including a key switch, a power supply and a load relay. The load relay is connected to the power supply to form a power supply circuit. Its structural feature is that it also includes a battery relay, the coil end of the battery relay is connected to the power supply to form a power supply circuit, the key switch is installed on the power supply circuit of the battery relay, and the normally open switch of the battery relay is installed on the coil circuit of the load relay.

[0006] After adopting the above structure, the key switch ACC supplies power to the battery relay coil, the battery relay controlled end changes from controlling the entire ACC to controlling only the coil of the secondary relay, and the secondary relay controlled end changes from ACC to normal power; the positive pole of the secondary relay coil is provided by the battery relay, and the negative pole is controlled by each switch; the above two measures can greatly reduce the load current of the battery relay, and then select a battery relay with a smaller overcurrent capacity. When using battery relays of the same specifications, a smaller load can effectively extend the service life of the relay.

[0007] Regarding the specific structural form of the load relay, the load relay includes high and low speed relays. The normally open switches of the high and low speed relays are installed on the power supply circuits of the high and low speed solenoid valves. Switches can be installed separately on the power supply circuits of the high and low speed solenoid valves.

[0008] Furthermore, the load relay includes a speaker relay, a normally open switch of the speaker relay is installed on the power supply circuit of the speaker, and a switch can be installed separately on the power supply circuit of the speaker.

[0009] Furthermore, the load relay includes a washer relay, a normally open switch of the washer relay is installed on the power supply circuit of the washer, and a switch can be installed separately on the power supply circuit of the washer.

[0010] Furthermore, the load relay includes a work light relay, a normally open switch of the work light relay is installed on the power supply circuit of the work light, and a switch can be installed separately on the power supply circuit of the work light.

[0011] Furthermore, the load relay includes a wiper low-speed relay, a wiper high-speed protection relay and a wiper high-speed relay, and control ends of the wiper low-speed relay, the wiper high-speed protection relay and the wiper high-speed relay are installed on the power supply circuit of the wiper.

[0012] In summary, the beneficial effects of the utility model are as follows: the key switch ACC supplies power to the battery relay coil, the battery relay controlled end is changed from the original control of the entire ACC power to only control the coil power of the secondary relay, and the secondary relay controlled end power is changed from ACC power to normal power; the positive pole power of the secondary relay coil is provided by the battery relay, and the negative pole is changed to be controlled by each switch; through the above two measures, the load current of the battery relay can be greatly reduced, and then a battery relay with a smaller overcurrent capacity can be selected. When using battery relays of the same specifications, a smaller load can effectively extend the service life of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the circuit structure of the utility model.

[0014] In the figure: key switch 1, battery relay 2, power supply 3, high and low speed relay 4, horn relay 5, washer relay 6, work light relay 7, wiper low speed relay 8, wiper high speed protection relay 9, wiper high speed relay 10, high and low speed solenoid valve 11, horn 12, washer 13, work light 14, wiper 15. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0020] A miniaturized power distribution circuit for a battery relay for an excavator includes a key switch 1, a power supply 3, and a load relay. The load relay is connected to the power supply 3 to form a power supply circuit. The structural feature is that it also includes a battery relay 2. The coil end of the battery relay 2 is connected to the power supply 3 to form a power supply circuit. The key switch 1 is installed on the power supply circuit of the battery relay 2, and the normally open switch of the battery relay 2 is installed on the coil circuit of the load relay. After adopting the above structure, the key switch 1 ACC power supplies power to the coil of the battery relay 2, and the controlled end of the battery relay 2 is changed from the original control of the entire ACC power to only control the coil power of the secondary relay, and the controlled end power of the secondary relay is changed from ACC power to normal power; the positive pole power of the secondary relay coil is provided by the battery relay 2, and the negative pole is changed to be controlled by each switch; through the above two measures, the load current of the battery relay 2 can be greatly reduced, and then a battery relay 2 with a smaller overcurrent capacity can be selected. When using battery relays 2 of the same specification, a smaller load can effectively extend the service life of the relay.

[0021] Refer to the attached Figure 1Regarding the specific structural form of the load relay, the load relay includes a high-speed and low-speed relay 4, the normally open switch of the high-speed and low-speed relay 4 is installed on the power supply circuit of the high-speed and low-speed solenoid valve 11, and the switch can be installed separately on the power supply circuit of the high-speed and low-speed solenoid valve 11. The load relay includes a horn relay 5, the normally open switch of the horn relay 5 is installed on the power supply circuit of the horn 12, and the switch can be installed separately on the power supply circuit of the horn 12. The load relay includes a washer relay 6, the normally open switch of the washer relay 6 is installed on the power supply circuit of the washer 13, and the switch can be installed separately on the power supply circuit of the washer 13. The load relay includes a work light relay 7, the normally open switch of the work light relay 7 is installed on the power supply circuit of the work light 14, and the switch can be installed separately on the power supply circuit of the work light 14. The load relay includes a wiper low-speed relay 8, a wiper high-speed protection relay 9 and a wiper high-speed relay 10, and the control ends of the wiper low-speed relay 8, the wiper high-speed protection relay 9 and the wiper high-speed relay 10 are installed on the power supply circuit of the wiper 15.

[0022] 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 miniaturized power distribution circuit for a battery relay for an excavator, comprising a key switch (1), a power supply (3) and a load relay, wherein the load relay is connected to the power supply (3) to form a power supply circuit, characterized in that: It also includes a battery relay (2), wherein the coil end of the battery relay (2) is connected to a power supply (3) to form a power supply circuit, a key switch (1) is installed on the power supply circuit of the battery relay (2), and a normally open switch of the battery relay (2) is installed on the coil circuit of the load relay.

2. The miniaturized power distribution circuit of the battery relay for excavator according to claim 1, characterized in that: The load relay comprises a high-speed and low-speed relay (4), and a normally open switch of the high-speed and low-speed relay (4) is installed on the power supply circuit of the high-speed and low-speed solenoid valve (11).

3. The miniaturized power distribution circuit of the battery relay for excavator according to claim 1, characterized in that: The load relay comprises a horn relay (5), and a normally open switch of the horn relay (5) is installed on a power supply circuit of the horn (12).

4. The miniaturized power distribution circuit of the battery relay for excavator according to claim 1, characterized in that: The load relay comprises a washer relay (6), and a normally open switch of the washer relay (6) is installed on a power supply circuit of the washer (13).

5. The miniaturized power distribution circuit of the battery relay for excavator according to claim 1, characterized in that: The load relay comprises a working light relay (7), and a normally open switch of the working light relay (7) is installed on a power supply circuit of the working light (14).

6. The miniaturized power distribution circuit of the battery relay for excavator according to claim 1, characterized in that: The load relay comprises a wiper low-speed relay (8), a wiper high-speed protection relay (9) and a wiper high-speed relay (10), and control ends of the wiper low-speed relay (8), the wiper high-speed protection relay (9) and the wiper high-speed relay (10) are mounted on a power supply circuit of the wiper (15).

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