Forklift full-type universal display adjusting circuit

Abstract

The utility model discloses a forklift full-type universal display adjusting circuit, which comprises a step-down power supply chip U12, the input end of the step-down power supply chip U12 is connected with a first filter circuit and a protection circuit, the protection circuit is connected with a power supply module, the protection circuit comprises a fuse F1 connected with the power supply module, the fuse F1 is respectively connected with a voltage limiting protection element and a TVS tube D9, and the TVS tube D9 is connected with the voltage limiting protection element. And the step-down power supply chip U12 can reduce and convert different voltages input by the input end into specified voltages, and outputs the specified voltages to a forklift display after the specified voltages are filtered by the second filter circuit connected with the output end of the step-down power supply chip U12. According to the utility model, by arranging the step-down power supply chip, different working voltages of different types of forklifts are reduced and converted into specified voltages, and the specified voltages are supplied to the forklift display for use, so that the same type of forklift display adapts to different types of forklifts; the input end and the output end of the step-down power supply chip are respectively connected with a filter circuit, so that stable signals can still be output after voltage conversion.

Description

TECHNICAL FIELD

[0001] The utility model relates to a forklift display field especially relates to a forklift full type general display adjustment circuit. BACKGROUND

[0002] The forklift display is an important component in forklift operation, which is generally used in cooperation with the forklift camera to provide real-time information of the forklift running state, which helps the driver to better control the forklift and improve the operation efficiency and safety.

[0003] The forklift is mainly divided into diesel forklift and pure electric forklift, the power supply of diesel forklift is mostly 12-36v voltage, and the power supply of pure electric forklift is mostly 60-120v voltage, and at present, the forklift display product type is relatively single, therefore, the diesel forklift and the pure electric forklift are respectively configured with the display of corresponding voltage.

[0004] The above-mentioned forklift display configuration of different vehicle types is more troublesome, and since the display cannot be mixed, after a forklift is damaged and scrapped, the display installed thereon cannot be installed on other types of forklifts, if the same type of forklift is not purchased, the display cannot continue to work, which invisibly increases the use cost of the forklift and causes unnecessary resource waste. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model aims at providing a forklift full type general display adjustment circuit to solve the problem that different types of forklift displays cannot be mixed in the prior art, and the specific technical scheme is as follows:

[0006] A forklift full type general display adjustment circuit, comprising a step-down power supply chip U12, a first filter circuit is connected to the input end of the forklift full type general display adjustment circuit, a protection circuit is connected to the first filter circuit, and the protection circuit is connected with a power module, wherein the protection circuit comprises a fuse F1 connected with the power module, the fuse F1 is respectively connected with a voltage limiting protection element and a TVS tube D9, and the other end of the voltage limiting protection element and the TVS tube D9 is grounded.

[0007] The step-down power supply chip U12 can reduce and convert different voltages input by the input end into specified voltages, and output the specified voltages to the forklift display after filtering through the second filter circuit connected to the output end.

[0008] As a preferred implementation manner, the protection circuit is connected with the first filter circuit through an anti-reverse diode D7, and is used for filtering unstable voltage signals.

[0009] As a preferred implementation: the first filter circuit includes a first inductive element L1 connected with the anti-reverse diode D7 and a plurality of first capacitive elements connected with the first inductive element L1 and in parallel with each other, the other ends of the plurality of first capacitive elements are grounded, and the plurality of first capacitive elements are connected with the step-down power supply chip U12.

[0010] As a preferred implementation: the fuse F1 is a self-restoring fuse.

[0011] As a preferred implementation: the voltage limiting protection element is a ceramic discharge tube.

[0012] As a preferred implementation: the step-down power supply chip U12 is connected with the second filter circuit through the anti-reverse diode D2, for filtering unstable voltage signals.

[0013] As a preferred implementation: the second filter circuit includes a second inductive element L12 connected with the step-down power supply chip U12 and a plurality of second capacitive elements connected with the second inductive element L12 and in parallel with each other, the other ends of the plurality of second capacitive elements are grounded, and the second filter circuit is connected with the forklift display through the inductive element L11.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model discloses a step-down power supply chip is set up, and different working voltage of different types of forklifts is reduced and is converted into specified voltage and is supplied to forklift display for use, so that the same type forklift display can adapt to different types of forklifts.

[0016] Meanwhile, the input end and the output end of the step-down power supply chip are connected with the first filter circuit and the second filter circuit respectively, the first filter circuit is connected with the power module through the protection circuit, the safety of the circuit is guaranteed, and different voltages are filtered through the filter circuit before and after being stepped down by the step-down power supply chip, so that stable signals can still be output after conversion voltage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole circuit diagram of the forklift full type general display adjusting circuit disclosed in the utility model embodiment one.

[0018] In the drawing: wafer 2.0 horizontal type is a connector, FRVL050 is a self-restoring fuse, 2R3000T-8 is a ceramic discharge tube, and EG1192H is a step-down power supply chip. DETAILED DESCRIPTION

[0019] The embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0020] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0021] Example 1

[0022] like Figure 1 As shown, a universal display adjustment circuit for all types of forklifts includes a step-down power supply chip U12, model EG1192H, which can achieve a voltage input of 11-120V. The input terminals of the step-down power supply chip U12 include VIN pin, gnd pin, EN pin, VIA pin and EP pin, and the output terminals of the step-down power supply chip U12 include IS pin, VS pin, VB pin and FP pin.

[0023] The VIN pin is connected to resistor R49, which in turn connects to the first filter circuit. Specifically, the other end of resistor R49 is connected to capacitor C4, which in turn connects to capacitor C137. Capacitor C137 is connected to the first inductor L1, which in turn connects to capacitor C2. Capacitor C2 is connected to the cathode of the anti-reverse diode D7. All capacitors C2, C137, and C4 are grounded. The first filter circuit eliminates interference signals, ensuring a stable signal input to the step-down power supply chip U12. The first filter circuit is also connected to a protection circuit. Specifically, the anode of the anti-reverse diode D7 is connected to the cathode of TVS diode D9, and the anode of TVS diode D9 is grounded, providing protection against high voltage. The anode of the anti-reverse diode D7 is also connected to a voltage limiting protection element to prevent damage to subsequent circuits. In this embodiment, the voltage limiting protection element is a ceramic discharge tube, which provides lightning protection and protects subsequent circuits. It is also connected to a fuse F1 with a self-resetting function. Fuse F1 is connected to the power module, which is connected to connector J6 for connecting to the forklift power supply.

[0024] The GND pin is grounded.

[0025] The EN pin is connected to resistor R49, and resistor R49 is connected to capacitor C4.

[0026] The VIA pin is connected to capacitor C126, and capacitor C126 is grounded.

[0027] The EP pin is connected to a power supply, and the power supply is connected to the resistor R49.

[0028] The first filter circuit connected to the input end of the step-down power supply chip U12 filters out redundant signals, and the power supply is connected through the protection circuit to prevent damage to the circuit caused by excessive voltage and ensure the stability and safety of the input voltage of the step-down power supply chip.

[0029] The step-down power supply chip U12 outputs a specified voltage after reducing the input voltage to power the forklift display. The output end of the step-down power supply chip U12 includes the IS pin, the VS pin, the VB pin, and the FB pin.

[0030] The IS pin is connected to the resistor R91, the resistor R91 is connected to the cathode of the anti-reverse diode D2, and the anode of the anti-reverse diode D2 is grounded. The resistor R91 is also connected to the second filter circuit, which specifically includes a second inductive element L12 connected to the resistor R91, the second inductive element L12 is connected to the capacitor C9, the capacitor C9 is connected to the capacitor C5, and is connected to the resistor R102, the capacitor C9, the capacitor C5, and the resistor R102 are all grounded. The resistor R102 is connected to the third inductive element L11, the third inductive element L11 is connected to the capacitor C109. The capacitor C109 is connected to the capacitor C124, and the capacitor C109 and the capacitor C124 are both grounded and output a 5V voltage for connecting the forklift display.

[0031] The VS pin is connected to the cathode of the anti-reverse diode D2 and the second inductive element L12. The VB pin is connected to the capacitor C29, the capacitor C29 is connected to the cathode of the anti-reverse diode D2, and is connected to the second inductive element L12.

[0032] The FB pin is connected to the anode of the anti-reverse diode D2, and is connected to the resistor R32, the resistor R4, and the capacitor C31. The resistor R32 is grounded, the capacitor C31 is connected to the capacitor C9, the capacitor C9 is connected to the capacitor C5, the capacitor C5 is connected to the inductor L11 and is connected to the forklift display, and the resistor R4 is connected in parallel to the capacitor C31.

[0033] The inductor L11 is connected to the capacitor C109 and the capacitor C124 respectively, and the capacitor C109 and the capacitor C124 are both grounded.

[0034] The second filter circuit filters the voltage output by the step-down power supply chip U12 to remove interference signals, outputs a specified frequency signal to output a more stable voltage, and ultimately provides a stable 5V voltage for the forklift display, so that different models of forklifts can use the same type of forklift display.

[0035] The adjusting circuit of the embodiment can convert the voltage of 11V-120V into a lower voltage of 5V, improve the safety line, and make the same type of forklift display adapt to different types of forklifts with different working voltages, save the cost of adapting the forklift display, avoid the problem that different types of forklift displays may be idle due to the inability to adapt to forklifts, and be suitable for popularization and use.

[0036] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0037] In the utility model, unless explicitly specified and limited, the first feature is "on" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through an intermediate medium. The meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0038] In the utility model, unless explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] The above is only for the purpose of illustrating the embodiments of the utility model, and is not used to limit the utility model. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model without creative labor should be included in the protection scope of the utility model.

Claims

1. A forklift full-type universal display adjustment circuit, characterized by: The voltage reducing power chip U12 is connected with the first filter circuit, the first filter circuit is connected with the protection circuit, the protection circuit is connected with the power module, wherein the protection circuit comprises the fuse F1 connected with the power module, the fuse F1 is connected with the voltage limiting protection element and the TVS tube D9 respectively, and the other ends of the voltage limiting protection element and the TVS tube D9 are grounded. The voltage reducing power chip can reduce and convert different input voltages into specified voltages, and output the specified voltages to the forklift display through the second filter circuit connected with the output end of the voltage reducing power chip.

2. The forklift full-range universal display adjustment circuit according to claim 1, characterized in that: The protection circuit is connected with the first filter circuit through the anti-reverse diode D7, and is used for filtering unstable voltage signals.

3. The forklift full-range universal display adjustment circuit according to claim 2, characterized in that: The first filter circuit comprises the first inductor L1 connected with the anti-reverse diode D7 and a plurality of first capacitors connected with the first inductor L1 and in parallel with each other, the other ends of the plurality of first capacitors are grounded, and the plurality of first capacitors are connected with the voltage reducing power chip U12.

4. The forklift full-range universal display adjustment circuit according to claim 1, characterized by: The fuse F1 is a self-recovery fuse.

5. The forklift full-range universal display adjustment circuit according to claim 1, characterized in that: The voltage limiting protection element is a ceramic discharge tube.

6. The forklift full-range universal display adjustment circuit of claim 1, wherein: The voltage reducing power chip U12 is connected with the second filter circuit through the anti-reverse diode D2, and is used for filtering unstable voltage signals.

7. A forklift full-range display adjustment circuit according to any one of claims 1 to 6, characterized in that: The second filter circuit comprises the second inductor L12 connected with the voltage reducing power chip U12 and a plurality of second capacitors connected with the second inductor L12 and in parallel with each other, the other ends of the plurality of second capacitors are grounded, and the plurality of second capacitors are connected with the forklift display through the inductor L11.

Images