High-low voltage full-isolation electric appliance control system for electric loader

Abstract

The utility model relates to the technical field of electric loaders, in particular to a high-low voltage full-isolation electric appliance control system for an electric loader. According to the electric appliance control system, two high-voltage normally-open relays are arranged in the braking and retreating processes of the electric loader respectively, and the two ends of the coil control ends of the relays are correspondingly connected to the high-voltage positive electrode end and the high-voltage negative electrode end of a wire harness respectively and correspondingly connected to the braking signal receiving end and the retreating signal receiving end of a controller; the controlled end of a relay coil is correspondingly connected to a brake lamp, a reversing lamp and a reversing buzzer; based on the above, when brake switches arranged at the coil control end of a relay and the high-voltage positive electrode end of a wiring harness are closed, a generated high-voltage signal drives a pull-in switch in the corresponding relay to be closed, so that a brake lamp / a reversing lamp / a reversing buzzer is correspondingly started; according to the invention, the low-voltage circuit is conducted based on the high-voltage circuit, so that the brake lamp, the reversing lamp and the reversing buzzer are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of electric loaders, in particular to a high-low voltage fully isolated electrical control system for electric loaders. Background Art

[0002] At present, electric loader controllers generally use high voltage as control signals, but the working voltage of common electrical parts such as lights, horns, and reversing buzzers is usually 12V or 24V. Based on the above, it is not difficult to know: First, if the whole vehicle voltage uses high voltage, there will be certain safety hazards (safe power voltage 36V), and the whole vehicle cannot be grounded, and the wiring harness cost will increase; second, if the whole vehicle voltage uses low voltage (12V or 24V), it will not reach the controller power supply voltage, and it is necessary to add a boost module to the controller electrical signal input and a buck module to the lithium battery discharge end, which will increase the cost.

[0003] In summary, there is an urgent need to provide a high and low voltage fully isolated electrical control system for an electric loader to solve the aforementioned technical problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a high and low voltage fully isolated electrical control system for an electric loader, which solves the technical problem existing in the existing electric loader that "it is difficult to simultaneously meet: the high voltage demand of the controller input end and the low voltage demand of the power supply end of common electrical appliances".

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] The utility model provides a high-low voltage fully isolated electrical control system for an electric loader, the electrical control system comprising: a controller, a first relay and a second relay;

[0009] The first relay and the second relay are both provided with: a coil control A end and a coil controlled A end and a coil controlled B end; the controller is provided with: a brake signal receiving end and a reverse signal receiving end;

[0010] For the first relay and the second relay, the coil control A end is connected to the high-voltage positive end of the wiring harness, and a corresponding brake switch is provided between the coil control A end and the high-voltage positive end of the wiring harness, the coil control B end is connected to the high-voltage negative end of the wiring harness, the coil controlled A end is connected to the low-voltage positive end of the wiring harness, and the coil controlled B end is connected to the corresponding low-voltage electrical appliance;

[0011] The first relay coil control A end is connected to the brake signal receiving end, and the second relay coil control A end is connected to the reverse signal receiving end.

[0012] Optionally, the first relay and the second relay are both: high-voltage normally open relays with an operating voltage of 72V;

[0013] Also, the wiring harness low voltage is set to 24V and the wiring harness high voltage is set to 62.9V.

[0014] Optionally, the front axle travel motor is connected to a controller; wherein the controller is: a front axle travel motor controller of model EVC550-8250A, and the model of the front axle travel motor is YBQ100-3-60B07C;

[0015] The front axle travel motor is used to control the forward / reverse movement of the electric loader based on the signal received from the controller.

[0016] Optionally, the first relay and the second relay are both provided with: an internal coil and an internal pickup switch;

[0017] The two ends of the internal coil serve as: coil control end A and coil control end B; the two ends of the internal pickup switch serve as: coil controlled end A and coil controlled end B.

[0018] Optionally, one end of the low-voltage electrical appliance is connected to the corresponding coil controlled B end, and the other end is connected to the low-voltage negative end of the wiring harness.

[0019] Optionally, the low-voltage electrical appliances respectively connected to the controlled B ends of the first relay coil include: a left rear brake light and a right rear brake light;

[0020] The low-voltage electrical appliances connected to the controlled B ends of the second relay coil include: a left reversing light, a right reversing light and a reversing buzzer.

[0021] Optionally, a first brake switch is provided between the first relay coil control A terminal and the wiring harness high voltage positive terminal;

[0022] A second brake switch is provided between the second relay coil control A terminal and the high voltage positive terminal of the wiring harness, and a function selection brake switch is provided between the second relay coil control A terminal and the second brake switch.

[0023] Optionally, the controller is further provided with a forward signal receiving terminal;

[0024] And, the function selection brake switch is matched to one of: a reverse closing gear and a forward closing gear; wherein, the reverse closing gear is correspondingly connected to the controlled B end of the second relay coil, and the forward closing gear is connected to the forward signal receiving end.

[0025] (III) Beneficial effects

[0026] In the present application, in the electrical control system of the electric loader, two high-voltage normally open relays are respectively arranged for the braking and reversing processes of the electric loader, and the two ends of the relay coil control end are respectively connected to the high-voltage positive and negative ends of the wiring harness, and are correspondingly connected to the brake signal receiving end and the reversing signal receiving end of the controller; the controlled end of the relay coil is correspondingly connected to the brake light, the reversing light and the reversing buzzer; based on the above, it is further achieved that: when the brake switch provided at the control end of the relay coil and the high-voltage positive end of the wiring harness is closed, the high-voltage signal generated thereby drives the corresponding internal switch of the relay to close, so as to correspondingly start the brake light / reversing light / reversing buzzer; the present application is based on the high-voltage circuit conducting the low-voltage circuit, thereby protecting the brake light, the reversing light and the reversing buzzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the connection of a high and low voltage fully isolated electrical control system for an electric loader provided by one embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the structure of a first relay provided in one embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the structure of a second relay provided in one embodiment of the utility model;

[0030] The foregoing Figures 1 to 3 The components included are:

[0031] Controller 1, first relay 2, second relay 3, coil control A end 4, coil control B end 5, coil controlled A end 6, coil controlled B end 7, internal coil 8, internal pickup switch 9, wiring harness high voltage positive end 10, wiring harness high voltage negative end 11, wiring harness low voltage positive end 12, wiring harness low voltage negative end 13, left rear brake light 14, right rear brake light 15, left reverse light 16, right reverse light 17, reverse buzzer 18, first brake switch 19, second brake switch 20, function selection brake switch 21, brake signal receiving end 22, reverse signal receiving end 23, forward signal receiving end 24, reverse closed gear 25, forward closed gear 26, front axle travel motor 27. DETAILED DESCRIPTION

[0032] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0033] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0034] Embodiment 1

[0035] This embodiment proposes a high and low voltage fully isolated electrical control system for an electric loader;

[0036] In this embodiment, it is first necessary to explain that:

[0037] For electric loaders, all actions of the loader are completed by the cooperation of the controller and the corresponding motor, and the control signal received by the controller is generally a high-voltage electrical signal. For example, when the working voltage range of the controller selected for the electric loader is 40-96V, the forward signal, key switch, seat switch and low-speed switch that need to be controlled in the controller can be directly input into the controller through the corresponding switch control high-voltage electrical signals, and then the controller controls the corresponding motor to realize the corresponding action of the electric loader; because the brake signal and the reverse signal are also high-voltage electrical signals, when the electric loader brakes or reverses, while the controller receives the high-voltage electrical signal, the brake light or reversing light, and the reversing buzzer also need to receive the corresponding high-voltage electrical signal, so as to provide warnings to external staff through sound and light warnings.

[0038] The operating voltage of brake lights, reversing lights and reversing buzzers used in general transport vehicles is usually 12V or 24V, but the working environment of construction machinery is more complex and harsh than that of household cars and commercial vehicles. Therefore, for electric loaders commonly used in mines and construction sites, in order to ensure the voltage safety of electrical components and facilitate maintenance and replacement, all electrical components except the controller are selected to be suitable for 24V voltage models. Since the 24V voltage is lower than the operating voltage range of 40-96V corresponding to the controller, the electrical control system of the electric loader needs to meet both the high voltage requirement of the controller input end and the low voltage requirement of the power supply end of common electrical components.

[0039] In this embodiment, it should be noted that Figure 1 As shown, the electrical control system described in this application includes: a controller 1, a first relay 2 and a second relay 3. Among them, the controller 1 is: a front axle travel motor controller of model EVC550-8250A; the first relay 2 and the second relay 3 are both: high-voltage normally open relays with a working voltage of 72V.

[0040] In this embodiment, for the first relay 2 and the second relay 3, it should be noted that:

[0041] The reason why the present application uses high-voltage normally open relays as the first relay 2 and the second relay 3 is that the electric loader involved in the present application is not equipped with a gearbox, and the forward / reverse is directly controlled by an electrical signal through a function selection brake switch 21. The function selection brake switch 21 controls both the forward and reverse signals, wherein the forward signal does not require high voltage control by other external electrical components; on the other hand, low-voltage relays can be selected to control both the reverse signal and the brake signal. However, in order to prevent assembly workers from using the wrong high-voltage relays and low-voltage relays during the assembly process, thereby damaging the low-voltage relays, high-voltage relays are used in the present application.

[0042] In this embodiment, Figure 2 and Figure 3 As shown, the first relay 2 and the second relay 3 are both provided with: a coil control A terminal 4 and a coil control B terminal 5 , a coil controlled A terminal 6 and a coil controlled B terminal 7 .

[0043] In this embodiment, for the aforementioned coil control A terminal 4 and coil control B terminal 5, coil controlled A terminal 6 and coil controlled B terminal 7, it should be noted that: Figure 2 and Figure 3 As shown, the first relay 2 and the second relay 3 are both provided with: an internal coil 8 and an internal pickup switch 9; the two ends of the internal coil 8 serve as: a coil control A end 4 and a coil control B end 5; the two ends of the internal pickup switch 9 serve as: a coil controlled A end 6 and a coil controlled B end 7.

[0044] In this embodiment, combined with Figure 1 , Figure 2 and Figure 3 For the first relay 2 and the second relay 3, the coil control A terminal 4 is connected to the wiring harness high voltage positive terminal 10, and a corresponding brake switch is provided between the coil control A terminal 4 and the wiring harness high voltage positive terminal 10, the coil control B terminal 5 is connected to the wiring harness high voltage negative terminal 11, the coil controlled A terminal 6 is connected to the wiring harness low voltage positive terminal 12, and the coil controlled B terminal 7 is connected to the corresponding low voltage electrical appliance.

[0045] In this embodiment, for the high-voltage end and the low-voltage end of the wiring harness, it should be noted that: the low voltage of the wiring harness is set to 24V, and the high voltage of the wiring harness is set to 62.9V.

[0046] In this embodiment, for the aforementioned low-voltage electrical appliances, it should be noted that:

[0047] First, combination Figure 1 , Figure 2 and Figure 3The low-voltage electrical appliances connected to the coil-controlled B end 7 of the first relay 2 include: a left rear brake light 14 and a right rear brake light 15; the low-voltage electrical appliances connected to the coil-controlled B end 7 of the second relay 3 include: a left reverse light 16, a right reverse light 17 and a reverse buzzer 18.

[0048] Second, combination Figure 1 , Figure 2 and Figure 3 One end of the low-voltage electrical appliance is connected to the corresponding coil controlled B end 7, and the other end is connected to the low-voltage negative end 13 of the wiring harness.

[0049] In this embodiment, combined with Figure 1 , Figure 2 and Figure 3 A first brake switch 19 is provided between the coil control A terminal 4 of the first relay 2 and the high-voltage positive terminal 10 of the wiring harness; a second brake switch 20 is provided between the coil control A terminal 4 of the second relay 3 and the high-voltage positive terminal 10 of the wiring harness, and a function selection brake switch 21 is provided between the coil control A terminal 4 of the second relay 3 and the second brake switch 20.

[0050] In this embodiment, Figure 1 As shown, the controller 1 is provided with a brake signal receiving terminal 22 , a reverse signal receiving terminal 23 and a forward signal receiving terminal 24 .

[0051] In this embodiment, combined with Figure 1 , Figure 2 and Figure 3 The coil control A terminal 4 of the first relay 2 is connected to the brake signal receiving terminal 22 , and the coil control A terminal 4 of the second relay 3 is connected to the reverse signal receiving terminal 23 .

[0052] In this embodiment, it should be noted that for the aforementioned function selection brake switch 21: Figure 1 As shown, the function selection brake switch 21 is matched to one of: the reverse closing gear 25 and the forward closing gear 26; wherein, combined with Figure 1 and Figure 3 The backward closing gear 25 is connected to the coil controlled B terminal 7 of the second relay 3 , and the forward closing gear 26 is connected to the forward signal receiving terminal 24 .

[0053] In this embodiment, Figure 1 As shown, the front axle travel motor 27 is connected to the controller 1 , and the model of the front axle travel motor 27 is YBQ100-3-60B07C; the front axle travel motor 27 is used to control the forward / reverse movement of the electric loader based on the signal received by the controller 1 .

[0054] For the high and low voltage fully isolated electrical control system for an electric loader described in the aforementioned embodiment 1, in the electrical control system of the electric loader, two high-voltage normally open relays are respectively provided for the braking and reversing processes of the electric loader, and the two ends of the relay coil control end are respectively connected to the high-voltage positive and negative ends of the wiring harness, and to the brake signal receiving end and the reversing signal receiving end of the controller; the controlled end of the relay coil is correspondingly connected to the brake light, the reversing light and the reversing buzzer; based on the above, it is further achieved that: when the brake switch provided at the control end of the relay coil and the high-voltage positive end of the wiring harness is closed, the high-voltage signal generated thereby drives the corresponding internal switch of the relay to close, so as to correspondingly start the brake light / reversing light / reversing buzzer; this application is based on the high-voltage circuit conducting the low-voltage circuit, thereby protecting the brake light, the reversing light and the reversing buzzer.

[0055] It should be noted that in the claims, any reference numerals placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The use of the words first, second, third, etc., is only for convenience of expression and does not indicate any order. These words may be understood as part of the component name.

[0056] In addition, it should be noted that, in the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0057] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments after knowing the basic creative concept. Therefore, the claims should be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0058] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention should also include these modifications and variations.

Claims

1. A high and low voltage fully isolated electrical control system for an electric loader, characterized in that: The electrical control system includes: a controller, a first relay and a second relay; The first relay and the second relay are both provided with: a coil control A end and a coil controlled A end and a coil controlled B end; the controller is provided with: a brake signal receiving end and a reverse signal receiving end; For the first relay and the second relay, the coil control A end is connected to the high-voltage positive end of the wiring harness, and a corresponding brake switch is provided between the coil control A end and the high-voltage positive end of the wiring harness, the coil control B end is connected to the high-voltage negative end of the wiring harness, the coil controlled A end is connected to the low-voltage positive end of the wiring harness, and the coil controlled B end is connected to the corresponding low-voltage electrical appliance; The first relay coil control A end is connected to the brake signal receiving end, and the second relay coil control A end is connected to the reverse signal receiving end.

2. The electrical appliance control system according to claim 1, characterized in that: The first relay and the second relay are both: high-voltage normally open relays with a working voltage of 72V; Also, the wiring harness low voltage is set to 24V and the wiring harness high voltage is set to 62.9V.

3. The electrical appliance control system according to claim 1, characterized in that: The front axle travel motor is connected to the controller; wherein the controller is: the front axle travel motor controller of model EVC550-8250A, and the model of the front axle travel motor is YBQ100-3-60B07C; The front axle travel motor is used to control the forward / reverse movement of the electric loader based on the signal received from the controller.

4. The electrical appliance control system according to claim 1, characterized in that: The first relay and the second relay are both provided with: an internal coil and an internal pickup switch; The two ends of the internal coil serve as: coil control end A and coil control end B; the two ends of the internal pickup switch serve as: coil controlled end A and coil controlled end B.

5. The electrical appliance control system according to claim 1, characterized in that: One end of the low-voltage electrical appliance is connected to the corresponding coil controlled B end, and the other end is connected to the low-voltage negative end of the wiring harness.

6. The electrical appliance control system according to claim 1, characterized in that: The low-voltage electrical appliances connected to the controlled B ends of the first relay coil include: a left rear brake light and a right rear brake light; The low-voltage electrical appliances connected to the controlled B ends of the second relay coil include: a left reversing light, a right reversing light and a reversing buzzer.

7. The electrical appliance control system according to claim 1, characterized in that: A first brake switch is provided between the first relay coil control A terminal and the wiring harness high voltage positive terminal; A second brake switch is provided between the second relay coil control A terminal and the high voltage positive terminal of the wiring harness, and a function selection brake switch is provided between the second relay coil control A terminal and the second brake switch.

8. The electrical appliance control system according to claim 7, characterized in that: The controller is also provided with a forward signal receiving terminal; And, the function selection brake switch is matched to one of: a reverse closing gear and a forward closing gear; wherein, the reverse closing gear is correspondingly connected to the controlled B end of the second relay coil, and the forward closing gear is connected to the forward signal receiving end.

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