JP2008266882A - Wiring structure of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction machine equipped with a counterweight, wherein wiring work can be easily performed in the arrangement of an electric wire for a battery etc., and the number of components for an electric wire fixing member such as a strap is reduced. <P>SOLUTION: A recessed groove 2b is formed in the inner peripheral surface portion 2a of the counterweight 2 mounted in the rear of a machine body, so as to serve as a wiring path for a battery cable 10 leading to a starter motor for the start of an engine from the battery; and the battery cable 10 in the recessed groove 2b is fixed by means of a fixing member 12 formed of an elastic material and detachably fitted into the recessed groove 2b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to the technical field of wiring structures in construction machines such as hydraulic excavators.

In general, a construction machine such as a hydraulic excavator is equipped with a battery and various electrical devices such as a starter motor, an alternator, a controller, a light, an air conditioner, a solenoid valve, a sensor, and an instrument. Electric wires are connected to these electrical equipments. However, when the electric wires are wired to the construction machine, if they are wired in a free state, they may move with the machine vibration and touch the surrounding objects to cause a disconnection. Therefore, conventionally, wiring is generally performed along an airframe structure such as a floor surface or an airframe frame, and is fixed with a clip, a strap, or the like.
By the way, in construction machines such as a hydraulic excavator, an engine room in which an engine, a radiator, and the like are disposed is provided in front of a counterweight mounted on the rear portion of the machine body, and a tank is disposed in front of the radiator in the engine room. And a battery in front of the tank (see, for example, Patent Documents 1 and 2). In this way, when the engine and the battery are arranged apart from each other, the battery cable from the battery to the starter motor for starting the engine bypasses the tank, the radiator, etc., and further the engine related filter such as a filter in the engine room. Wiring is performed so as to bypass various devices.
Japanese Patent Laid-Open No. 11-81374 JP 2002-97665 A

  However, for example, a small construction machine such as a mini excavator has a small space. Therefore, as described above, when wiring the battery cable so as to bypass the tank, the radiator, various engine-related devices, etc. Therefore, it is difficult to secure a free space for the battery, and therefore, it is necessary to wire the cable while fixing it with a strap so that the battery cable does not interfere with other devices by sewing a slight gap. Such a permission or a large number of fixing members such as straps is necessary, which causes a problem of high cost. In addition, the radiator and the engine are usually separated by a radiator support that supports the radiator. However, if the battery cable is routed through a partition wall such as the radiator support, the radiator and the engine are further separated. In addition, there is a problem that it is necessary to attach a grommet for holding the battery cable to the through hole of the partition wall, and there is a problem that the number of parts for wiring further increases, and here is a problem to be solved by the present invention. is there.

The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 is a construction machine in which a counterweight is mounted on the rear part of the machine body. A wiring structure in a construction machine, wherein a concave groove is formed in an inner side surface portion of a counterweight, and the concave groove is used as a wiring path of an electric wire distributed to the construction machine.
In the invention of claim 2, a fixing member for fixing the electric wire wired in the groove is disposed in the groove, and the fixing member is formed of an elastic material and is detachable from the groove. The wiring structure in the construction machine according to claim 1, wherein the wiring structure is fitted.
According to a third aspect of the present invention, in the construction machine according to the first or second aspect, the electric wire wired in the concave groove is a battery cable extending from the battery to the starter motor for starting the engine.

With the invention of claim 1, it is possible to perform the wiring of the electric wire by effectively using the counterweight, so that it is not necessary to separately secure a space for wiring, and while being fixed with a strap or the like There is no need to perform wiring by bypassing other equipment or wiring through a partition wall, wiring work can be performed easily and in a short time, and can greatly contribute to improvement of workability. At the same time, the number of parts for fixing electric wires such as straps can be reduced, which contributes to cost reduction. Moreover, since the electric wires wired in the concave grooves of the counterweight are protected by the counterweight, it is possible to reliably avoid the possibility of interference with other equipment devices.
By making it the invention of claim 2, the electric wire wired in the concave groove is fixed by the fixing member, so that the electric wire is surely removed from the concave groove inadvertently. The fixing member is formed of an elastic material and is detachably fitted into the groove, so that it is possible to fix the electric wire very easily without the need for a tool or the like. Contributes to improved workability and cost reduction.
According to the invention of claim 3, wiring of the battery cable from the battery to the starter motor for starting the engine can be performed easily and at low cost.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a revolving frame that serves as a frame for an upper revolving structure of a hydraulic excavator. A counterweight 2 is mounted on the rear portion of the revolving frame 1 to balance the machine body. In this embodiment, it is formed in an arc shape. Further, in the latter half of the swivel frame 1, the engine 3, the radiator 4, the hydraulic pump 5, various engine-related devices such as a filter and an alternator (not shown), etc., with the arc-shaped counterweight 2 being surrounded on the rear side. In this embodiment, the radiator 4 is disposed on the right side of the engine 3 (right side as viewed from the rear of the swivel frame 1), and the radiator 4 and the engine are disposed. 3 is separated by a radiator support 7 to which the radiator 4 is attached and supported. In addition, a proximal end portion of a front attachment (not shown) is attached to a central portion in the left-right direction of the front half of the revolving frame 1, while a hydraulic oil tank 8 is disposed in front of the radiator 4 on the right side of the front half of the revolving frame 1. Further, a battery 9 is disposed in front of the hydraulic oil tank 8, and a driver seat portion (not shown) is disposed on the left side of the front half of the revolving frame 1.

  As described above, the battery 9 is disposed on the right side of the front half of the revolving frame 1. One of the battery cables connected to the terminal of the battery 9 is a starter for starting the engine. The battery cable 10 for supplying electric power to the motor 11 and supplying electric power to the starter motor 11 passes from the battery 9 to the right end of the counterweight 2 through the right side of the hydraulic oil tank 8. After being guided, it is wired so as to reach a starter motor 11 assembled to the engine 3 in the engine room 6 through a groove 2b described later formed in the counterweight 2.

  That is, as described above, the counterweight 2 is attached and fixed to the rear portion of the turning frame 1 so as to surround the rear side of the engine room 6. A U-shaped groove 2b extending in the direction is formed. A battery cable 10 extending from the battery 9 to the starter motor 11 is arranged in the concave groove 2b.

  On the other hand, 12 is a fixing member for fixing the battery cable 10 wired in the concave groove 2b, and is formed of an elastic material such as rubber. The fixing member 12 is inserted through the battery cable 10. And a notch 12b extending from the insertion hole 12a to the outer peripheral edge of the holding member 12. And the fixing member 12 can insert the battery cable 10 into the insertion hole 12a from the outer peripheral side of the fixing member 12 by expanding the cut 12b, and in a state where the battery cable 10 is inserted, The battery cable 10 can be fixed in the concave groove 2b in a state in which the expansion of the cut 12b is restricted by being detachably fitted into the concave groove 2b. In the present embodiment, there are a total of three fixing members 12 at the center and both ends in the left-right direction of the groove 2b, but the length dimension of the groove 2b is not limited to this. Needless to say, a suitable number may be arranged corresponding to the above.

  In the present embodiment configured as described above, the battery cable 10 for supplying power to the starter motor 11 is supplied from the battery 9 disposed on the right side of the front half of the swing frame 1 to the engine provided in the rear half of the swing frame 1. The battery cable 10 is wired so as to reach the starter motor 11 in the room 6. In this case, the battery cable 10 is a concave formed on the inner peripheral surface portion 2 a of the counterweight 2 mounted on the rear portion of the turning frame 1. Wiring is performed to reach the starter motor 11 using the groove 2b as a wiring path.

  As a result, it is possible to effectively use the counterweight 2 to wire the battery cable 10 from the battery 9 to the starter motor 11. Thus, when wiring the battery cable 10, the wiring space is reduced. There is no need to secure it separately, and it is wired so as to bypass the radiator 4 and various engine-related devices in the engine room 6 while being fixed with a strap or the like, and is wired through the radiator support 7. This eliminates the need for wiring work, which can be performed easily and in a short time, can greatly contribute to the improvement of workability, can reduce the number of fixing members such as straps, and can also contribute to cost reduction. In addition, since the battery cable 10 wired in the concave groove 2b of the counterweight 2 is protected by the counterweight 2, even if the battery cable 10 moves slightly due to body vibration or the like, the battery cable 10 Can surely avoid the possibility of interference with other equipment.

  Further, in this case, the battery cable 10 wired in the concave groove 2b of the counterweight 2 is fixed in the concave groove 2b by the fixing member 12, so that the battery cable 10 is inadvertently dropped from the concave groove 2b. However, in this case, the fixing member 12 is formed of an elastic material such as rubber and is detachably fitted into the concave groove 2b so as to be detachable. The battery cable 10 in the recessed groove 2b can be fixed very easily without the need for a tool or the like, which can contribute to further improvement in workability and cost reduction.

Of course, the present invention is not limited to the above-described embodiment. In the above-described embodiment, the battery cable connected to the engine starter motor disposed in the engine room in front of the counterweight. Is wired in the concave groove formed in the counterweight, thereby facilitating the wiring of the battery cable. As the electric wire wired in the concave groove formed in the counterweight, the starter motor Without being limited to the battery cable to be connected, for example, it may be an electric wire connected to an alternator disposed in the engine room like the starter motor, and an electrical component such as a lamp is arranged at the rear of the fuselage. In a construction machine, the electric wire connected to the electrical component is wired in a concave groove formed in the counterweight. It can also be.
Furthermore, in the said embodiment, although the length of a ditch | groove is designed by the length which can guide a battery cable to the arrangement | positioning position of the starter motor in an engine room, it is not limited to this Corresponding to the arrangement position of the electrical component to which the electric wire in the concave groove is connected, for example, the length of the counterweight extends over the entire length of the left or right, or shorter than the concave groove of the above embodiment. You can also In addition, a plurality of electric wires can be wired in the groove, and a plurality of grooves can be formed in the counterweight.
Furthermore, the present invention is not limited to a hydraulic excavator, and can of course be applied to various construction machines in which a counterweight is mounted at the rear of the machine body.

It is the perspective view seen from the back of the revolving frame where various apparatus apparatuses were arranged. It is the perspective view seen from the front of the counterweight which wired the cable.

Explanation of symbols

2 Counterweight 2a Inner peripheral surface 2b Groove 9 Battery 10 Cable 11 Starter motor 12 Fixing member

Claims (3)

  In a construction machine in which a counterweight is mounted at the rear part of the machine body, a concave groove is formed on the inner side surface of the counterweight, and the concave groove is used as a wiring path of an electric wire distributed to the construction machine. Wiring structure in construction machinery.   A fixing member for fixing the electric wire wired in the concave groove is disposed in the concave groove, and the fixing member is formed of an elastic material and is detachably fitted into the concave groove. The wiring structure in the construction machine according to claim 1.   The wiring structure in the construction machine according to claim 1 or 2, wherein the electric wire wired in the concave groove is a battery cable extending from the battery to the starter motor for starting the engine.

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