JPH0559735U - Fuse box for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] In a conventional fuse box equipped with a hydraulic excavator, a large number of fuses are closely arranged in a small fuse box, and therefore it is necessary to identify a fuse that has broken. It was difficult, took a lot of effort and time. Moreover, at the time of the above-mentioned determination operation, the power of the power supply battery is consumed, and so-called battery raising may occur. The present invention aims to solve the above problems. [Structure] In the present invention, a check switch is provided in the fuse box, and the light emitting diodes are connected in parallel with the electric paths connected to the downstream side contacts of the plurality of fuses, and all the downstream sides of the light emitting diodes are connected. To form a connecting electric circuit, and the connecting electric circuit was grounded via the check switch.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a fuse box in an electric circuit installed in a construction machine, a work vehicle, or the like.

[0002]

[Prior Art]

 FIG. 3 is a perspective view showing an assembly structure of the fuse box 1 mounted on a hydraulic excavator (not shown). In the figure, 2 is a base body of the fuse box 1, 3 is a cord, 4 is a cover, F is a fuse, and 5 is a fuse puller. FIG. 4 is a plan view of an essential part viewed from AA in FIG. In the figure, 6F, 7F,-, NF are fuses, respectively. FIG. 5 is an electric circuit diagram of a main part including a fuse box 1 of the related art. In the figure, 6R, 7R,-, NR are various electrical loads, 6S, 7S,-, NS are switches for electrical loads 6R, 7R,-, NR, 8 is a main switch, and 9 is a switch. Power. In the electric circuit of the prior art equipped in the hydraulic excavator, as shown in FIGS. 3 to 5, a large number of fuses 6F, 7F, ..., NF are arranged in the base body 2 of the fuse box 1, and the power source 9 and , A plurality of electric loads 6R, 7R,-, NR are connected in parallel via fuses 6F, 7F,-, NF, respectively.

[0003]

[Problems to be solved by the device]

 In hydraulic excavators, the fuse box is minimized in order to secure space inside the vehicle body. For this reason, a large number of fuses are closely arranged in the fuse box, which makes it difficult to identify a blown fuse. When determining whether the fuse is broken, it takes a lot of labor and time to check whether each electric load is energized or de-energized by operating the switch. Moreover, the energizing operation consumes the power of the power source battery, which may cause so-called battery charging. An object of the present invention is to provide a fuse box that can solve the above problems.

[0004]

[Means for Solving the Problems]

 In the present invention, a check switch is provided in the fuse box, and the light emitting diodes are connected in parallel with the electric paths connected to the downstream side contacts of the multiple fuses, respectively, and all the downstream sides of the light emitting diodes are connected. The connection electric circuit was formed by connecting them, and the connection electric circuit was grounded via the check switch.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a main part of a fuse box 10 of the present invention. In the figure, 11 is a base body of the fuse box 10, 12 is a check switch, 6F, 7F,-, NF are fuses respectively, and 6L, 7L,-, NL are light emitting diodes (LEDs), respectively. FIG. 2 is an electric circuit diagram of a main part of a hydraulic excavator having a fuse box 10 of the present invention. In the drawing, the same reference numerals are given to those using the same constituent elements in the conventional technique.

Next, the configuration of the fuse box 10 of the present invention will be described with reference to FIGS. 1 and 2. A check switch 12 is provided on the base body 11 of the fuse box (10), and in parallel with the electric paths 6W, 7W,-, NW which are connected to the downstream contacts of a large number of fuses 6F, 7F,-, NF. The light emitting diodes 6L, 7L,-, NL are connected to each other, and all the downstream sides of the light emitting diodes 6L, 7L,-, NL are connected to form a connecting electric path 13, and the connecting electric path 13 is connected to the check switch 12 described above. It was constructed by grounding it.

Next, the operation of the fuse box 10 of the present invention will be described. When checking for a broken fuse in the fuse box 10, the main switch 8 is turned on. In this case, the switches 6S, 7S,-, NS for various electric loads are kept in the off state. Next, the check switch 12 is turned on. The current from the power source 9 is branched from the main switch 8 side in parallel, and the fuses 6F, 7F,-, NF are respectively connected to the electric paths 6W, 7W,-, NW, the light emitting diodes 6L, 7L,-, NL, and the connection electric paths 13 and the check switch 12 to the earth 14. Therefore, when there is no blown fuse, the light emitting diodes 6L, 7L, ..., NL are all turned on. However, if there is a blown fuse, no current flows through the light emitting diode connected to the blown fuse, so that the light emitting diode remains off. Therefore, in the fuse box 10 of the present invention, by operating the main switch 8 and the check switch 12, it is possible to easily identify the blown fuse in a short time. In addition, since the battery (power source 9) consumes almost no electric power during the operation of determining the blown fuse, there is no concern about the battery going up, and maintainability is improved.

[0008]

[Effect of the device]

 In the conventional fuse box installed in the hydraulic excavator, a large number of fuses are closely arranged in a small fuse box, which makes it difficult to identify a blown fuse. When determining whether the fuse is broken, it takes a lot of labor and time to check whether each electric load is energized or de-energized by a switch operation. Moreover, the energizing operation consumes the power of the power supply battery, which may cause so-called battery charging. However, in the fuse box of the present invention, a check switch is provided in the fuse box, and a light-emitting diode is connected in parallel with each of the electric paths connected to the downstream side contacts of a number of fuses, and the downstream side of the light-emitting diode is connected to the fuse box. All were connected to form a connected electric circuit, and the connected electric circuit was grounded via the check switch. When checking the fuse for disconnection, turn on the main switch and operate the check switch. The current from the battery branches from the main switch side and flows in parallel through each fuse, each light emitting diode, and check switch to the ground. Therefore, when there is no blown fuse, all the light emitting diodes are turned on. However, if there is a blown fuse, no current flows in the light emitting diode connected to the blown fuse, so the light emitting diode remains in the off state. Therefore, in the fuse box of the present invention, by operating the check switch, it is possible to easily discriminate a fuse that has been broken in a short time. In addition, since the battery consumes almost no electric power during the operation of distinguishing a blown fuse, there is no concern about the battery going up, and maintainability is improved.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a fuse box according to the present invention.

FIG. 2 is an electric circuit diagram of a main part of a hydraulic excavator having a fuse box of the present invention.

FIG. 3 is a perspective view showing an assembly structure of a conventional fuse box.

FIG. 4 is a plan view of an essential part seen from AA in FIG.

FIG. 5 is a main part electric circuit diagram including a conventional fuse box.

[Explanation of symbols]

 1, 10 Fuse box 2, 11 Base body 6F, 7F, ─, NF Fuse 6R, 7R, ─, NR Electrical load 6S, 7S, ─, NS switch 6W, 7W, ─, NW Electric circuit 6L, 7L, ─, NL LED 8 Main switch 9 Power supply 12 Check switch 13 Connection circuit

Claims (1)

[Scope of utility model registration request] 1. A power source installed in a construction machine, a work vehicle, etc. and a large number of various electric loads are connected in parallel via fuses, and the large number of fuses are arranged in a fuse box. A fuse box having means for distinguishing a broken fuse among the above fuses, provided with a check switch in the fuse box, and an electric circuit connected to each downstream side contact of a large number of fuses. A fuse box for a construction machine, wherein light-emitting diodes are connected in parallel, and all the downstream sides of the light-emitting diodes are connected to form a connection electric path, and the connection electric path is grounded via the check switch.