CN220964663U - Isolatable DC device for electric forklift and electric forklift - Google Patents
Isolatable DC device for electric forklift and electric forklift Download PDFInfo
- Publication number
- CN220964663U CN220964663U CN202322627717.6U CN202322627717U CN220964663U CN 220964663 U CN220964663 U CN 220964663U CN 202322627717 U CN202322627717 U CN 202322627717U CN 220964663 U CN220964663 U CN 220964663U
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- direct current
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- power supply
- forklift
- electric forklift
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- 238000002955 isolation Methods 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 8
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Forklifts And Lifting Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model relates to a DC converter device for an electric forklift, which belongs to the technical field of intelligent control of special engineering machinery, and comprises a direct current input end, a direct current output end, a converter unit, an isolating switch, an isolating judging unit and a control unit; the converter unit is connected with the direct current input end and the direct current output end, and converts the input direct current power supply into an output power supply suitable for the electric forklift when receiving the direct current power supply input; the isolation judging unit is connected with the isolating switch and the isolating device control unit and judges whether the electric connection between the electric system and the external power supply is required to be cut off when an external power supply fault signal is received; and the control unit is connected with the converter unit and the isolating switch and is used for controlling the operation states of the converter unit and the isolating switch when receiving a control signal of a forklift driver. The utility model has the advantages of safety, convenience, fault diagnosis, power recovery and the like.
Description
Technical Field
The utility model relates to an isolatable DC device for an electric forklift and the electric forklift, and belongs to the technical field of intelligent control of special engineering machinery.
Background
Current electric forklifts typically use a dc battery as their power source. In daily operation, the battery needs to be charged frequently, which inevitably creates some safety hazards. Current electric forklifts must connect the battery to the electrical circuit of the vehicle when performing the charging operation, which can result in the battery being difficult to repair and maintain. In addition, since the battery is connected to the electric circuit of the electric fork-lift truck, the malfunction of the battery may cause the vehicle to malfunction.
Disclosure of utility model
The utility model aims to overcome the technical problems and provide an isolatable DC device for an electric forklift and the electric forklift.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
An isolatable DC device for an electric forklift, comprising
The direct current input end is used for receiving direct current power input of the electric forklift;
the direct current output end is used for outputting the converted direct current power supply to the electric forklift;
The converter unit is connected with the direct current input end and the direct current output end, and converts the input direct current power supply into an output power supply suitable for the electric forklift when receiving the direct current power supply input;
the isolating switch is used for cutting off the electrical connection between the forklift electric system and an external power supply;
The isolation judging unit is connected with the isolating switch and the isolating device control unit and judges whether the electric connection between the electric system and the external power supply is required to be cut off when an external power supply fault signal is received;
And the control unit is connected with the converter unit and the isolating switch and is used for controlling the operation states of the converter unit and the isolating switch when receiving a control signal of a forklift driver.
Furthermore, the converter unit adopts a pulse width modulation technology, and adjusts the voltage and current of the output direct current power supply by adjusting the width and the duty ratio of the pulse.
Further, the isolating switch comprises a direct current breaker and a power isolating switch, wherein the direct current breaker is used for isolating a battery from a circuit of the electric forklift in a charging operation; the power isolation switch is used for isolating the power supply before connecting the battery with the circuit of the electric forklift. Wherein, the direct current breaker and the power isolating switch have overload protection function. The direct current breaker and the power isolating switch are controlled by a programmable controller. The direct current circuit breaker and the power isolating switch have the function of fault elimination.
Furthermore, the isolating switch is controlled by a mechanical handle or a remote controller, and a soft switch technology is adopted.
Furthermore, the direct current breaker and the power isolating switch are controlled by the programmable controller and have overload protection function and fault removal function.
Further, the isolation judging unit judges whether the electric connection between the electric system and the external power supply needs to be cut off or not by detecting the frequency, amplitude or waveform characteristics of the fault signal of the external power supply.
Further, the control unit may be controlled by an electronic control system comprising a manual switch or an automatic control device connected to the operating portion of the fork truck.
Further, the electric power supply system also comprises an alarm unit, wherein the alarm unit is connected with the isolating switch, the isolating device control unit and the control unit, and an alarm signal is sent out when the electric connection between the electric system and the external power supply is cut off.
Further, the electric power recovery device also comprises a power recovery unit for reestablishing the electric connection between the forklift electric system and the external power supply after the external power supply is in fault recovery. Wherein the power restoration unit may determine whether the electrical connection needs to be reestablished by monitoring restoration of the external power failure signal.
Further, an electric forklift is provided with the isolatable DC device; the electric forklift is an electric forklift with lifting capacity of 3-3.5T and rated voltage of 80V.
The isolatable DC device for the electric forklift and the electric forklift provided by the embodiment of the utility model have the following beneficial effects:
1. the safety is improved: the isolation DC device can cut off the electrical connection between the electric forklift and an external power supply, effectively reduce the power supply danger of the electric forklift under the conditions of shutdown, maintenance and the like, avoid electric shock accidents and protect the safety of forklift drivers and other personnel.
2. Protection electric fork truck: when the external power supply fails, the isolation DC device can rapidly cut off the electrical connection between the electric forklift and the external power supply, so that damage of the failure power supply to the electric forklift is avoided, and maintenance and replacement costs are reduced.
3. The operation is convenient: the switch, the control unit, the judging unit and the alarm unit of the isolation DC device are arranged at positions which are easy to operate and observe, so that a driver can conveniently control and monitor the isolation state, the operation efficiency is improved, and the safe operation of the driver on the electric forklift is ensured.
4. Fault diagnosis: the isolation DC device is provided with a fault detection unit, so that the fault of the device can be timely detected and diagnosed, and an alarm signal is sent out, so that a driver or a maintainer can take measures timely, and the loss and the downtime caused by the fault are reduced.
5. And (3) power recovery: the isolation DC device is provided with a power recovery unit, so that the electric connection between the electric forklift and the external power supply can be reestablished after the external power supply fails to recover, the normal operation is recovered, and the reliability and the continuous working capacity of the electric forklift are improved.
Drawings
Fig. 1 is a block diagram of an isolatable DC device for an electric forklift according to an embodiment of the present utility model;
Fig. 2 is a circuit diagram of an isolatable DC device for an electric forklift according to an embodiment of the present utility model.
Detailed Description
The following detailed description of the technical solutions of the present utility model will be given by way of the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present utility model are detailed descriptions of the technical solutions of the present utility model, and not limiting the technical solutions of the present utility model, and that the embodiments and technical features of the embodiments of the present utility model may be combined with each other without conflict.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Examples
As shown in fig. 1 and 2, a first embodiment of the present utility model provides an isolatable DC device for an electric forklift, comprising
The direct current input end is used for receiving direct current power input of the electric forklift, and the rated voltage of the battery of the electric forklift is 80V;
The direct current output end is used for outputting a converted direct current power supply to the electric forklift, and the rated voltage of the direct current output end is 12V and is used for connecting low-voltage devices of the electric forklift, such as lamplight and a loudspeaker;
The converter unit is connected with the direct current input end and the direct current output end, and converts the input direct current power supply into an output power supply suitable for the electric forklift when receiving the direct current power supply input;
the isolating switch is used for cutting off the electrical connection between the forklift electric system and an external power supply;
And the isolation judging unit is connected with the isolating switch and the isolating device control unit and judges whether the electric connection between the electric system and the external power supply is required to be cut off when an external power supply fault signal is received.
And the control unit is connected with the converter unit and the isolating switch and is used for controlling the operation states of the converter unit and the isolating switch when receiving a control signal of a forklift driver.
The converter unit adopts a pulse width modulation technology, and the voltage and the current of the output direct current power supply are regulated by adjusting the width and the duty ratio of the pulse.
The isolating switch comprises a direct current breaker and a power isolating switch, wherein the direct current breaker is used for isolating a battery from a circuit of the electric forklift in a charging operation. The power isolation switch is used to isolate the power supply prior to connecting the battery to the electrical circuitry of the electric fork-lift truck. Wherein, the direct current breaker and the power isolating switch have overload protection function. The direct current breaker and the power isolating switch are controlled by a programmable controller. The direct current circuit breaker and the power isolating switch have the function of fault elimination.
Specifically, when the electric forklift needs to be maintained, the power isolating switch is firstly turned on, and the battery is isolated from the circuit of the electric forklift. In this way, it is ensured that the electric fork-lift truck is not affected at all during maintenance and repair of the battery. Then, the dc breaker is opened, and the battery is connected to the electric fork-lift truck. At this time, the electric forklift can normally operate and perform various operations.
In the charging process, when the battery is required to be maintained and repaired, the battery and the electric fork truck circuit can be isolated only by closing the direct current breaker and then opening the power isolating switch. In this way, the operator can repair and maintain the battery under safe conditions.
The isolating switch can be controlled by a mechanical handle or a remote controller. The isolating switch adopts a soft switching technology to improve efficiency and reduce power loss.
The isolation determination unit may determine whether it is necessary to cut off the electrical connection between the electric system and the external power source by detecting the frequency, amplitude or waveform characteristics of the external power source fault signal.
The control unit may be controlled by an electronic control system comprising a manual switch or an automatic control device connected to the operating portion of the fork truck.
The electric power supply system also comprises an alarm unit, wherein the alarm unit is connected with the isolating switch, the isolating device control unit and the control unit, and an alarm signal is sent out when the electric connection between the electric system and the external power supply is cut off.
The power recovery unit is used for reestablishing the electrical connection between the forklift electric system and the external power supply after the external power supply is in fault recovery. Wherein the power restoration unit may determine whether the electrical connection needs to be reestablished by monitoring restoration of the external power failure signal.
The present embodiment provides an electric forklift, which is configured as described in any one of the embodiments. The electric forklift can be an electric forklift with lifting capacity of 3-3.5T and rated voltage of 80V.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.
Claims (10)
1. An isolatable DC device for an electric forklift comprising
The direct current input end is used for receiving direct current power input of the electric forklift;
the direct current output end is used for outputting the converted direct current power supply to the electric forklift;
The converter unit is connected with the direct current input end and the direct current output end, and converts the input direct current power supply into an output power supply suitable for the electric forklift when receiving the direct current power supply input;
the isolating switch is used for cutting off the electrical connection between the forklift electric system and an external power supply;
The isolation judging unit is connected with the isolating switch and the isolating device control unit and judges whether the electric connection between the electric system and the external power supply is required to be cut off when an external power supply fault signal is received;
And the control unit is connected with the converter unit and the isolating switch and is used for controlling the operation states of the converter unit and the isolating switch when receiving a control signal of a forklift driver.
2. The isolatable DC device for an electric forklift of claim 1 wherein said inverter unit employs pulse width modulation techniques to regulate the voltage and current of the output DC power supply by adjusting the width and duty cycle of the pulses.
3. The isolatable DC device for an electric forklift of claim 1, wherein said isolation switch comprises a direct current circuit breaker and a power isolation switch, wherein said direct current circuit breaker is used to isolate a battery from the electric circuit of the electric forklift during a charging operation; the power isolation switch is used for isolating a power supply before connecting the battery with a circuit of the electric forklift; the direct current circuit breaker and the power isolating switch have overload protection functions; the direct current circuit breaker and the power isolating switch are controlled by a programmable controller; the direct current circuit breaker and the power isolating switch have the function of fault elimination.
4. The isolatable DC device for an electric forklift of claim 1 wherein said isolating switch is controlled by a mechanical handle or remote control using soft switching technology.
5. The isolatable DC device for an electric forklift of claim 3 wherein said direct current circuit breaker and said power isolation switch are controlled by a programmable controller, each having overload protection and fault removal functions.
6. The isolatable DC device for an electric forklift according to claim 1, wherein the isolation judging unit judges whether or not it is necessary to cut off the electrical connection between the electric system and the external power supply by detecting the frequency, amplitude or waveform characteristics of the external power supply fault signal.
7. An isolatable DC device for an electric forklift as claimed in claim 1, wherein the control unit is controllable by an electronic control system comprising a manual switch or an automatic control device connected to the operating part of the forklift.
8. The isolatable DC device for an electric forklift of claim 1, further comprising an alarm unit connected to the isolating switch, the isolating device control unit and the control unit, for emitting an alarm signal when the electrical connection between the electric system and the external power source is cut off.
9. The isolatable DC device for an electric forklift of claim 1, further comprising a power restoration unit for reestablishing an electrical connection between the forklift electric system and an external power source after an external power source failure has been restored; wherein the power restoration unit may determine whether the electrical connection needs to be reestablished by monitoring restoration of the external power failure signal.
10. An electric forklift truck provided with an isolatable DC device for an electric forklift truck as claimed in any one of claims 1 to 9; the lifting capacity of the electric forklift is 3-3.5T, and the rated voltage of the battery is 80V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322627717.6U CN220964663U (en) | 2023-09-27 | 2023-09-27 | Isolatable DC device for electric forklift and electric forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322627717.6U CN220964663U (en) | 2023-09-27 | 2023-09-27 | Isolatable DC device for electric forklift and electric forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220964663U true CN220964663U (en) | 2024-05-14 |
Family
ID=91008306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322627717.6U Active CN220964663U (en) | 2023-09-27 | 2023-09-27 | Isolatable DC device for electric forklift and electric forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220964663U (en) |
-
2023
- 2023-09-27 CN CN202322627717.6U patent/CN220964663U/en active Active
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