Photosensitive license plate lamp for tire type excavator

Abstract

The utility model provides a photosensitive license plate lamp for a tire type excavator, which belongs to the technical field of license plate lamps and comprises a license plate lamp shell, the license plate lamp shell is hollow, a light control circuit is placed in the license plate lamp shell, and a photosensitive resistor and an LED lamp bead are arranged on the light control circuit in parallel. A first window and a second window are formed in the top of the license plate lamp shell, the photoresistor is arranged right opposite to the first window, and the LED lamp beads are arranged right opposite to the second window. The license plate lamp does not need to be additionally provided with wiring harnesses and is suitable for the tire type excavator, and the license plate lamp can be automatically lightened when detecting that ambient light becomes dark, so that automatic control of the license plate lamp is achieved, and operation of a driver is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of license plate lights, and in particular relates to a photosensitive license plate light for a tire excavator. Background Art

[0002] Excavators are one of many types of working machinery, including crawler excavators and wheel excavators. Compared with crawler excavators, wheel excavators are easy to move and do not require trailers, so they are popular with many engineering companies. With the increase in the number of wheel excavator models in the domestic market, in order to maintain normal order and pedestrian safety, traffic management departments will investigate and punish wheel excavators on the road without license plates.

[0003] The existing license plate lights of wheel excavators on the market can only be lit when turned on manually, and cannot be automatically lit when walking or working in dark or dim light scenes (such as entering a tunnel).

[0004] In addition, the existing photosensitive license plate lights usually set the photosensitive element and the license plate light separately, which makes the vehicle wiring harness layout more complicated and is not suitable for tire excavators. Utility Model Content

[0005] In view of the defects or shortcomings in the prior art, the utility model provides a photosensitive license plate light for a tire excavator, which does not require additional wiring harness arrangement and is suitable for tire excavators. The license plate light can be automatically lit when it detects that the ambient light is dimming, thereby realizing automatic control of the license plate light and reducing driver operation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An embodiment of the utility model provides a photosensitive license plate light for a tire excavator, comprising a license plate light housing, the interior of the license plate light housing is hollow, a light control circuit is placed inside the license plate light housing, a photoresistor and an LED lamp bead are arranged in parallel on the light control circuit, a first window and a second window are opened on the top of the license plate light housing, the photoresistor is arranged opposite to the first window, and the LED lamp bead is arranged opposite to the second window.

[0008] Furthermore, the license plate light housing includes a top plate and two side plates, the top plate is an arched structure, and the two side plates are symmetrically arranged on both sides of the top plate.

[0009] Furthermore, the connection between the top plate and the two side plates is an arc-shaped transition, and the top plate and the two side plates are integrally formed.

[0010] Furthermore, the sensing end of the photoresistor extends out of the license plate light housing through the first window.

[0011] Furthermore, the license plate lamp housing is provided with an opening at the bottom, and a license plate lamp blocking cover is provided at the bottom opening of the license plate lamp, and the license plate lamp blocking cover is embedded in the bottom opening of the license plate lamp housing.

[0012] Furthermore, the first window is arranged at the top of the license plate light housing, bolt holes are opened on both sides of the first window, and mounting bolts are arranged in the bolt holes.

[0013] Furthermore, a through hole is provided on the license plate light cover at a position corresponding to the bolt hole, and the mounting bolt passes through the license plate light housing and the license plate light cover in sequence.

[0014] Furthermore, the second window is located on a side panel on one side of the license plate light housing.

[0015] Furthermore, a power plug is connected to the light control circuit, a third window is provided on the license plate light cover, the power plug is arranged opposite to the third window, and the power plug is connected to the vehicle wiring harness.

[0016] Furthermore, a triode is also provided on the lighting control circuit, one end of the photoresistor is connected to the base of the triode through the resistor R2, the other end of the photoresistor is connected to the vehicle main power switch, the positive pole of the LED lamp bead is connected to the vehicle main power switch through the resistor R3, the negative pole of the LED lamp bead is connected to the collector of the triode, the emitter of the triode is connected to the photoresistor through a sliding rheostat, the sliding rheostat is connected to the negative pole of the polarity capacitor, the positive pole of the polarity capacitor is connected to the vehicle main power switch, and the vehicle main power switch is connected to the vehicle main power supply.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model integrates a photoresistor, an LED lamp bead and a light control circuit inside a license plate lamp housing, and can realize automatic control of the license plate lamp through only one power line, thereby reducing the complexity of the vehicle wiring harness layout. The utility model is suitable for tire excavators, does not require manual control, and reduces the driver's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front structure of the license plate light in the embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the reverse structure of the license plate light in the embodiment of the utility model;

[0021] Figure 3 This is a lighting control circuit diagram in an embodiment of the utility model;

[0022] Among them, 1. license plate light housing; 2. top plate; 3. side plate; 4. photoresistor; 5. license plate light cover; 6. first window; 7. bolt hole; 8. mounting bolt; 9. second window; 10. third window. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] A typical implementation of the present utility model is as follows Figure 1 and Figure 2 As shown, a photosensitive license plate light for a tire excavator includes a license plate light housing 1, which is hollow inside and open at the bottom. Specifically, the license plate light housing 1 includes a top plate 2 and two side plates 3, the top plate 2 is an arched structure, the two side plates 3 are symmetrically arranged on both sides of the top plate 2, the connection between the top plate 2 and the two side plates 3 is an arc transition, and the top plate 2 and the two side plates 3 are integrally formed.

[0025] The interior of the license plate lamp housing 1 is used to place the lighting control circuit, LED lamp beads and photoresistor 4. A license plate lamp blocking cover 5 is provided at the bottom opening of the license plate lamp housing 1. The license plate lamp blocking cover 5 is embedded in the bottom opening of the license plate lamp housing 1. A plurality of card blocks are provided on the bottom inner wall of the license plate lamp housing 1. The license plate light blocking cover 5 is connected with the card blocks to fix the license plate light blocking cover 5 to the bottom of the license plate lamp housing 1, thereby protecting the electronic components inside the license plate lamp housing 1.

[0026] A first window 6 is provided on the top of the license plate lamp housing 1, and a photoresistor 4 is arranged in the first window 6. The sensing end of the photoresistor 4 extends out of the license plate lamp housing 1 through the first window 6. One end of the photoresistor 4 located inside the license plate lamp housing 1 is connected to the light control circuit, so that the photoresistor 4 is used to sense the intensity of the surrounding light.

[0027] Bolt holes 7 are provided on both sides of the first window 6, and mounting bolts 8 are arranged in the bolt holes 7. Through holes are provided on the license plate light cover 5 at positions corresponding to the bolt holes 7. The mounting bolts 8 pass through the license plate light housing 1 and the license plate light cover 5 in sequence, so that the license plate light can be fixed to the vehicle body by using the mounting bolts 8.

[0028] A second window 9 is also provided on the license plate lamp housing 1. The second window 9 is located on the side panel 3 on one side. LED lamp beads are placed in the second window 9. When installed, the second window 9 is arranged vertically to the license plate, so that the LED lamp beads are used to illuminate the license plate. A transparent acrylic plate is installed at the second window 9, which can ensure the light transmittance and protect the electronic components inside the license plate lamp housing 1.

[0029] The LED lamp beads are connected to the light control circuit, which also includes a three-stage tube Q1 (3DG6C). Figure 3As shown, one end of the photoresistor R1 is connected to the base of the triode Q1 (3DG6C) through the resistor R2 (33K), the other end of the photoresistor R1 is connected to the vehicle main power switch K1, the positive electrode of the LED lamp bead LED1 is connected to the vehicle main power switch K1 through the resistor R3, the negative electrode of the LED lamp bead LED1 is connected to the collector of the triode Q1 (3DG6C), the emitter of the triode Q1 (3DG6C) is connected to the photoresistor R1 through the sliding rheostat RP1, the sliding rheostat RP1 is connected to the negative electrode of the polarity capacitor C1, the positive electrode of the polarity capacitor C1 is connected to the vehicle main power switch K1, and the vehicle main power switch K1 is connected to the vehicle main power supply, so that the intensity of the ambient light is sensed by the photoresistor to control the switch of the LED lamp bead.

[0030] When the incident light is strong, the resistance of the photoresistor R1 decreases. After the input voltage is divided by the photoresistor R1 and the sliding rheostat RP1, the voltage loaded to the base of the transistor Q1 is small. At this time, the transistor Q1 cannot be turned on, and there is no current in the LED1 lamp circuit, and the light is not on; when the incident light is dark, the photoresistor R1 prevents the increase, and the voltage loaded to the base of the transistor Q1 is large. At this time, the transistor Q1 enters the on state, and current flows through the LED1 lamp circuit, and the lamp is on; thus, the photoresistor is used to sense the intensity of the surrounding light to control the switch of the LED lamp bead.

[0031] By adjusting the resistance of the sliding resistor RP1, the voltage divided by the sliding rheostat RP1 and the photoresistor R1 can be changed, thereby changing the voltage at the base of the transistor Q1. This can adjust the degree to which the transistor Q1 is turned on when the light becomes dim, that is, realize the adjustment of lighting the lamp when the light is dim.

[0032] If the resistance of the sliding rheostat RP1 increases, the photoresistor R1 needs a larger resistance (the light becomes dimmer) to turn on the transistor Q1 and light the lamp. Conversely, if the resistance of the sliding rheostat RP1 is reduced, the lamp can be turned on when the light is not very dim.

[0033] Furthermore, capacitor C1 is provided to filter out DC offset and low-frequency noise caused by voltage fluctuation, thereby ensuring the stability and reliability of the DC circuit; resistor R2 is provided to provide current limiting protection for transistor Q1; resistor R3 is provided to provide current limiting protection for LED lamp beads.

[0034] The lighting control circuit is also connected to a power plug. A third window 10 is provided on the license plate light cover 5. The power plug is arranged opposite to the third window 10. The power plug is connected to the vehicle wiring harness, and thus connected to the vehicle main power supply through the vehicle main power switch K1. The vehicle main power supply provides a 12V DC power supply, thereby powering the license plate light.

[0035] The utility model integrates a photoresistor, an LED lamp bead and a light control circuit inside a license plate lamp housing, and can realize automatic control of the license plate lamp through only one power line, thereby reducing the complexity of the vehicle wiring harness layout. The utility model is suitable for tire excavators, does not require manual control, and reduces the driver's operation.

[0036] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A photosensitive license plate light for a tire excavator, characterized in that: It includes a license plate lamp housing, which is hollow inside and has a light control circuit placed inside. A photoresistor and an LED lamp bead are arranged in parallel on the light control circuit. A first window and a second window are opened on the top of the license plate lamp housing. The photoresistor is arranged opposite to the first window, and the LED lamp bead is arranged opposite to the second window.

2. The photosensitive license plate light for a tire excavator according to claim 1, characterized in that: The license plate lamp housing comprises a top plate and two side plates, wherein the top plate is an arched structure, and the two side plates are symmetrically arranged on both sides of the top plate.

3. The photosensitive license plate light for a tire excavator according to claim 2, characterized in that: The connection between the top plate and the two side plates is an arc-shaped transition, and the top plate and the two side plates are integrally formed.

4. The photosensitive license plate light for a tire excavator according to claim 1, characterized in that: The sensing end of the photoresistor extends out of the license plate lamp housing through the first window.

5. The photosensitive license plate light for a tire excavator according to claim 1, characterized in that: The bottom opening of the license plate lamp housing is provided, and a license plate lamp blocking cover is provided at the bottom opening of the license plate lamp, and the license plate lamp blocking cover is embedded in the bottom opening of the license plate lamp housing.

6. The photosensitive license plate light for a tire excavator according to claim 5, characterized in that: The first window is arranged on the top of the license plate lamp housing, bolt holes are opened on both sides of the first window, and mounting bolts are arranged in the bolt holes.

7. The photosensitive license plate light for a tire excavator according to claim 6, characterized in that: A through hole is provided on the license plate light blocking cover at a position corresponding to the bolt hole, and the mounting bolt passes through the license plate light housing and the license plate light blocking cover in sequence.

8. The photosensitive license plate light for a tire excavator as claimed in claim 2, characterized in that: The second window is located on a side plate at one side of the license plate light housing.

9. The photosensitive license plate light for a tire excavator according to claim 5, characterized in that: The light control circuit is also connected to a power plug. A third window is provided on the license plate light cover. The power plug is arranged opposite to the third window and is connected to a vehicle wiring harness.

10. The photosensitive license plate light for a tire excavator according to claim 1, characterized in that: The light control circuit is also provided with a triode, one end of the photoresistor is connected to the base of the triode through a resistor R2, the other end of the photoresistor is connected to the vehicle main power switch, the positive electrode of the LED lamp bead is connected to the vehicle main power switch through a resistor R3, the negative electrode of the LED lamp bead is connected to the collector of the triode, the emitter of the triode is connected to the photoresistor through a sliding rheostat, the sliding rheostat is connected to the negative electrode of the polarity capacitor, the positive electrode of the polarity capacitor is connected to the vehicle main power switch, and the vehicle main power switch is connected to the vehicle main power supply.

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