KR20020000570A - Overload alarm bell apparatus for truck - Google Patents

Abstract

PURPOSE: An overload warning device for a truck is provided to detect a displacement amount of a plate spring without any influence of external factors for improving the reliability of the detected displacement amount. CONSTITUTION: An overload warning device for a truck includes a housing fixed to an auxiliary frame, a roller(26) coupled in the housing by a shaft(28), a wire(20) wound on the roller, a rotary encoder(34) coupled with an end of the shaft for converting a rotation change amount of the roller to an electric signal, an auxiliary controller(36) mounted to an output part of the rotary encoder for collecting the electric signal output from the rotary encoder to convert the electric signal to a digital signal, and a main controller(38) mounted to an output part of the auxiliary controller for converting a load of cargoes on the basis of information transmitted from the auxiliary controller to output.

Description

Overload Alarm for Freight Vehicles {OVERLOAD ALARM BELL APPARATUS FOR TRUCK}

The present invention relates to an overload warning device for a cargo vehicle, and in particular, by allowing the operator to check the weight of cargo carried on both sides of the loading box, the vehicle body can be prevented from being displaced to one side due to unbalanced cargo, and also heavy cargo If this is the case, it is related to the overload alarm device for freight vehicles, which makes it possible to prevent overloading by sounding an alarm.

In general, the leaf spring installed in the cargo vehicle is installed between the main frame and the rear axle of the vehicle, which primarily provides the load of the loading box and the elastic load of the cargo loaded on the secondary loading box. Given.

These leaf springs are mainly used in the places where a large load is applied.

Looking at the prior art of the Republic of Korea Utility Model Publication No. 96-24209, the prior art, both ends of the leaf spring is first fixed to the main frame, the rear axle is installed in the lower center of the leaf spring.

Between the upper end of the leaf spring and the main frame is installed a cargo weight detection means for checking the weight of the cargo carried in the loading box, the detection means is connected to the leaf spring and the frame respectively guide the slider guides, and the slider Spring for mounting elastically, and variable resistor and electrode installed in the state adjacent to the slider and the outside of the guide to detect the degree of deformation of the leaf spring by the load applied to the frame and digitize and output the signal. do.

Referring to the operation of the conventional technology configured as described above is as follows.

When the cargo is first loaded into the load box, the load is transmitted to the leaf spring through the main frame, where the leaf spring elastically receives the load and gives the load box lowered by the weight of the cargo.

As described above, when the loading box descends, the slider compresses the spring while descending in proportion.

At this time, the displacement of the leaf spring is detected by the variable resistor detecting the moving distance of the slider.

The conventional technology has a structure in which the variable resistor is installed in close proximity to the slider, which causes a problem in that the displacement amount of the leaf spring cannot be detected more accurately due to a foreign material, etc., for a long time of use, thereby lowering reliability.

Another problem is that the operator can not grasp that the cargo loaded in the load as the overall balance is loaded, the center of gravity of the vehicle is imbalanced.

It is an object of the present invention to improve the reliability by allowing the displacement amount of the leaf spring to be detected without being influenced by external requirements.

Another object is to improve convenience by allowing the operator to grasp and adjust the imbalance from the outside when the cargo loaded in the loading box is imbalanced.

The present invention for realizing this, a housing fixed to the auxiliary frame, a roller coupled to the shaft inside the housing, a wire wound around the front end fixed to the rear axle to the roller, and the other end of the shaft A rotary encoder coupled to convert the rotational change amount of the roller into an electrical signal, an auxiliary controller for collecting the electrical signal transmitted to the rotary encoder output unit and converts it into a digital signal and outputs it to the auxiliary controller output unit; It is composed of a main controller that converts the load of cargo based on the information.

1 is a state diagram installed embodiment of the present invention.

2 is a perspective view showing the structure of the present invention;

Figure 3 is a graph showing the state of the leaf spring when the cargo loaded in the cargo loading.

<Explanation of symbols for the main parts of the drawings>

2: loaded 4: main frame 6: secondary frame

8: Bracket 10: Leaf spring 12: Rear axle

14: fixing plate 16: fixing bolt 17: weight sensing unit

18, 32: Lug 20: Wire 22: Housing

24: Hall 26: Roller 28: Shaft

30: Spiral spring 34: Rotary encoder 36: Auxiliary controller

38: main controller 40: display unit 42: buzzer

In the present invention, as shown in FIG. 1, the main frame 4 is provided to give the stacking box 2, and the main frame 4 has a plurality of auxiliary frames 6 distributed along the lengthwise direction. Is installed.

In addition, two brackets 8 are respectively installed at a predetermined distance from one side of the lower side of the main frame 4, and the brackets 8 installed as above are equally installed on the other side of the main frame 4.

Both ends of each of the brackets (8), the ends of the leaf spring 10 for elastically giving the weight of the cargo carried in the stacking box (2) are each coupled to one side to combine the not shown sackle, the plate The middle portion of the spring 10 is located on the rear axle 12 and is provided with a fixing plate 14 at the top.

At this time, the leaf spring 10 is fixed to the rear axle 12 as the U-shaped high information bolt 16 coupled to the rear axle 12 is fixed while being fastened to the fixing plate 14. do.

A weight sensing unit 17 is installed between each of the leaf springs 10 installed at both sides of the main frame 4 to detect a load of a cargo carried in the loading box 2, and lugs are provided at both sides of the rear axle 12. 18 are provided, respectively, and the lugs 18 are fixed to the end portions of the wires 20 whose lengths are changed by the lower loading box 2.

The wire 20 is installed in the housing 22 as shown in FIG.

The housing 22 forms a rectangular parallelepiped to be easily installed in the auxiliary frame 6, and a hole 24 through which the wire 20 enters and exits is formed at one bottom surface of the housing 22. It is provided.

A roller 26 wound around the wire 20 is installed inside the housing 22, and a shaft 28 constituting a rotation center is rotatably coupled to one side wall of the housing 22 in the roller 26. .

And the other side of the shaft 28 is provided with a spiral spring 30 for providing an action force so that the roller 26 rotates to return to the original position, the rear end of the spiral spring 30 is It is fixed to the shaft 28 and the tip is coupled to the lug 32 which is installed on the bottom surface of the housing 22.

Along with the other end of the shaft 28, a rotary encoder 34, which serves to change the rotational change amount of the roller 26 into an electrical signal, is coupled, and the electrical signal transmitted to the rotary encoder 34 is output. The auxiliary controller 36 is connected to collect and convert the digital signal to output.

The rotary encoder 34 and auxiliary controller 36 are installed in the housing 22.

In addition, the auxiliary controller 36, the output unit is connected to the main controller 38 for converting the load of the cargo based on the information transmitted, the main controller 38 is separated from the housing 22, the driver's seat not shown It may be located at or may be selectively installed outside the vehicle.

The main controller 38 has a display unit 40 to visually check the load of the cargo contained in the loading box 2, and a buzzer to notify a warning when the load of the loading box 2 exceeds the rated load. 42 are respectively connected.

Referring to the operation of the present invention configured as described above are as follows.

First, when the load is placed in the loading box (2), the load is passed through the main frame (4) at both ends of the leaf spring 10, wherein the leaf spring 10 is elastically opened by the load transmitted to the Dedicated to the loading box (2).

Therefore, both ends of the leaf spring 10 is in a position which is lowered from the initial position while opening.

As described above, the displacement amount of the leaf spring 10 is different depending on the type and weight of the cargo as shown in a, b, and c of FIG.

Subsequently, when the stacking box 2 is lowered, the weight sensing unit 17 also changes, which will be described below.

First, both ends of the leaf spring 10 are positioned at the initial height before the cargo is loaded in the stacking box 2, and the weight sensing unit 17, the main frame 4, the auxiliary frame 6, etc. And the wire 20 wound on the roller 26 is unrolled to a constant length.

At this time, the spiral spring 30 is to rotate the shaft 28 in one direction by the elastic force, the front end of the wire 20 wound on the roller 26, the lug 18 is installed on the rear axle 12 In the state of being fixed and tightened), despite the repulsive force of the spiral spring 30, the shaft 28 does not rotate and remains stationary.

When the cargo is loaded in the loading box 2 in the above state, the loading frame 2 and the main frame 4 press the leaf spring 10 in proportion to the load of the auxiliary frame 6, the feeling of weight It descends with the branch 17 and the like.

Due to this, the wire 20 wound on the roller 26 is in a loose state in proportion to the distance from which the loading box 2 is lowered. In this case, the spiral spring 30 exerts an elastic force to the shaft 28. To rotate in one direction with the roller 26.

Thus, the wire 20 is in a taut state as the loose excess is wound around the roller 26.

As described above, when the shaft 28 rotates, the rotary encoder 34 converts the amount of change into an electronic signal by the rotational speed and transmits it to the sub-controller 36, and the information reaching the sub-controller 34 is digital. The signal is converted into a signal and transmitted to the main controller 38.

The information transmitted as described above converts the rotational speed of the shaft 28 rotated by the change amount of the length of the wire 20 in the main controller 38 to the load of the cargo, and the converted value is the display unit 40. To indicate.

Subsequently, when the cargo is loaded in the stacking box 2, the stacking box 2, the main frame 4, the auxiliary frame 6, the weight sensing unit 17, etc. are lowered together and the wire 20 as described above. ), Which causes the rotating shaft (28) to be wound around the roller (26) by the elastic force of the spiral spring (30).

Therefore, the rotational speed of the shaft 28 is converted into an electronic signal by the rotary encoder 34, such information is sequentially transmitted to the auxiliary controller 36 and the main controller 38, the display unit 40 The amount of change appears at).

At this time, if the cargo loaded in the loading box (2) exceeds the standard weight, the main controller 38 sends a signal to the buzzer 42 to inform the operator to stop the further loading.

In the process of loading the cargo as described above, if the cargo is loaded in an unbalanced stack 2, the wires 20 of the weight sensing unit 17, respectively installed on both sides of the rear axle 12 to vary the length This results in a different amount of displacement detected at each of the rotary encoders 34.

Subsequently, the rotary encoders 34 of the weight sensing units 17 provided on both sides of the rear axle 12 respectively transmit information to the main controller 38 through the auxiliary controller 36.

Therefore, the main controller 38 converts the weight of the cargo loaded on both sides of the stacking box 2 based on the transmitted information and displays it on the display unit 40.

In such a state, the operator does not load the cargo loaded in the stacking box 2 to one side, so that the cargo loaded in the stacking box 2 can be totally balanced.

The present invention has a structure for detecting the displacement of the leaf spring by the amount of change in the length of the wire, it is possible to detect without being affected by external requirements, etc., thereby improving the reliability.

Another effect is that when the cargo loaded in the loading box is imbalanced, the operator can load the cargo while adjusting the cargo, thereby improving convenience.

Claims (6)

A housing 22 fixed to the auxiliary frame 6, Roller 26 coupled to the shaft 28 in the housing 22, A wire 20 wound around the roller 26 to fix the tip portion to the rear axle 12; A rotary encoder 34 coupled to the other end of the shaft 28 to convert the rotational change amount of the roller 26 into an electrical signal; The rotary encoder 34 outputs an auxiliary controller 36 which collects an electrical signal transmitted and converts it into a digital signal and outputs the digital signal. Overload alarm device for a cargo vehicle, characterized in that the auxiliary controller 36, the output unit is composed of a main controller 38 for converting the output of the load based on the information transmitted. The method of claim 1, Spiral spring 30 is coupled to the shaft 28, the rear end of the spiral spring 30 is fixed to the outer periphery of the shaft 28 and the front end is fixed to the inner bottom surface of the housing 22 Overload alarm device for a cargo vehicle, characterized in that. The method according to claim 1 or 2, Overload alarm device for a cargo vehicle, characterized in that the main controller 38, the display unit 40 for indicating the load of the loaded cargo is connected. The method according to claim 1 or 2, Overload alarm device for a cargo vehicle, characterized in that connected to the main controller 38, a buzzer (42) that sounds an alarm when the cargo loaded in the loading box (2) is overloaded. The method of claim 3, wherein The roller 26, the wire 20, the rotary encoder 34, and the auxiliary controller 36 are installed in the housing 22, and the housing 22 is installed on both sides of the rear axle 12, respectively. And a main controller (38) connected to an output of an auxiliary controller (36) installed in each of the housings (22). The method of claim 3, wherein The main controller 38 converts the displacement amount of each of the leaf springs 10 to the display unit 40 based on the information provided from the sub-controllers 36 located on both sides of the rear axle 12. Featured overload alarm for freight vehicles.