JP2005068962A - Fuel piping structure in construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency of fuel hose laying work in a construction machine. <P>SOLUTION: The fuel piping structure comprises a swing frame 1 having a pair of side plates 2A and 2B and an end plate 3C, a fuel tank 5 located outside the pair of side plates 2A and 2B on the swing frame 1, a motor 4 arranged at least across one the side plates 2A and 2B on the swing frame 1 and driven by fuel from the fuel tank 5, and fuel pipes 7A, 7B and 7C connecting the fuel tank with the motor 4. This fuel piping system is constructed so that the fuel pipes 7A, 7B and 7C are laid up to the vicinity of the ends of side plates 2A and 2B, passing along the outer edge of swing frame 1 located outside the side plates 2A and 2B, across one of the plates 2A or 2B and along the upper edge of the end plate 3C. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fuel piping structure for a construction machine.

Generally, in a construction machine, an upper structure is disposed on an upper part of a lower structure, and a driver's cab and various work devices are provided on a frame of the upper structure. Here, a hydraulic excavator will be described as an example of the construction machine.
The hydraulic excavator has an upper swing body as an upper structure on the lower traveling body as a lower structure, and the upper swing body includes an engine, a hydraulic drive device, a hydraulic oil tank, an engine fuel tank, and the like. It is arranged. In addition, this fuel tank is located away from the engine (for example, the upper swivel) from the viewpoint of balancing the weight of the vehicle body, the relationship with other devices and hydraulic piping, and being less susceptible to the heat generated by the engine. (For example, refer to Patent Document 1).

In such a case, in order to dispose the fuel tank on the upper swing body at a position away from the engine, a fuel supply hose pipe (fuel hose) that connects the engine and the fuel tank across the width direction of the upper swing body is provided. ) Must be laid.
JP 2000-266377 A

However, since the upper revolving body is provided with a side plate for ensuring strength in the longitudinal direction, in order to lay the fuel hose across the width direction of the upper revolving body, It is necessary to make a hole for fuel hose piping. This will be described with reference to FIG.
FIG. 4 shows a swing frame 101 which is a base of the upper swing body. The swing frame 101 has a pair of side plates 102A and 102B arranged in the longitudinal direction, and a fuel tank 103 is disposed on the right side thereof. An engine 104 is disposed on the swing frame 101, and a fuel filter 105 is disposed on the side (left side) of the side plate 102B opposite to the side on which the fuel tank 103 is disposed. Has been.

  The fuel tank 103 and the fuel filter 105 are connected by a fuel hose 106, the fuel filter 105 and the engine 104 are connected by a fuel hose 107, and the engine 104 and the fuel tank 103 are connected by a fuel hose 108. Yes. Thereby, the fuel in the fuel tank 103 is supplied to the fuel filter 105 via the fuel hose 106, and then the fuel filtered by the fuel filter 105 is supplied to the engine 104 via the fuel hose 107. It has become. Further, the overflowed fuel in the engine 104 is returned to the fuel tank 103 via the fuel hose 108.

  In addition, in order to lay these fuel hoses 106, 107, 108, fuel hose laying holes 110A, 110B, 110C, 110D are drilled in the side plates 102A, 102B and the cross members 109A, 109B. In general, 107 and 108 are laid so as to pass through holes 110A, 110B, 110C and 110D for laying fuel hoses.

However, when the fuel hose laying holes 110A, 110B, 110C, and 110D are formed in this way, there is a problem that the strength of the side plates 102A and 102B and the cross members 109A and 109B is reduced.
Further, the ends of the fuel hoses 106, 107, and 108 are provided with a base 111A having a linear shape (straight type) as shown in FIG. 6A, or as shown in FIG. In order to pass the fuel hoses 106, 107, 108 through the holes 110A, 110B, 110C, 110D for laying the fuel hoses, since the base 111B having a bent shape (90 ° type) is provided. It is necessary to insert the caps 111A, 111B into the fuel hose laying holes 110A, 110B, 110C, 110D.

However, since these caps 111A and 111B are made of metal and cannot be bent, this causes the workability of laying the fuel hoses 106, 107, and 108 to be significantly reduced.
In particular, when the 90 ° type base 111B is passed through the holes 110A, 110B, 110C, 110D for laying the fuel hose, in addition to the problem that the workability is deteriorated, the holes 110A, 110B, There is also a problem that the diameters of 110C and 110D must be increased. However, increasing the diameter of the fuel hose laying holes 110A, 110B, 110C, 110D drilled in the side plates 102A, 102B, etc. may reduce the strength of the side plates 102A, 102B.

Incidentally, various electrical harnesses are also laid on the swing frame 101, as shown in FIG. 5 is basically the same as the diagram shown in FIG. 4, but differs from FIG. 4 in that the electrical harness 112 is also laid on the swing frame 101.
As shown in FIG. 5, the laying route of these electrical harnesses 112 is often the same as the laying route of the fuel hoses 106, 107, and 108. As described above, the side plates 102A, 102B and the cross members 109A, 109B are already provided with the fuel hose laying holes 110A, 110B, 110C, 110D, and the fuel hose laying holes 110A, 110B. This is because the electrical harness 112 is laid using 110C, 110D. This is a measure for further reducing the strength of the member when a hole for laying the electrical harness 112 is newly drilled in a member such as the side plates 102A and 102B.

However, it is not preferable from the viewpoint of workability to install the fuel hoses 106, 107, 108 and the electrical harness 112 close to each other.
The present invention has been made in view of such problems, and an object of the present invention is to provide a fuel piping structure for a construction machine that can improve the workability of laying a fuel hose.

  The fuel pipe structure for a construction machine according to claim 1 is a swing frame comprising a pair of side plates and an end plate for connecting between the end portions of the pair of side plates in the fuel pipe structure for a construction machine. A fuel tank disposed outside the pair of side plates on the swing frame, and a fuel tank disposed across at least one side plate of the pair of side plates on the swing frame, And a fuel pipe member that connects the fuel tank and the prime mover, and the fuel pipe member is located on the outer edge of the swing frame that is located outside the pair of side plates. Along the edge of the side plate, straddling the one side plate, and further It is characterized by being laid along the upper edge of the over bets.

  According to a second aspect of the present invention, there is provided a fuel pipe structure for a construction machine according to the first aspect, wherein the fuel is disposed on the side of the swing frame opposite to the fuel tank with respect to the pair of side plates. A filter is provided, and the fuel piping member is configured to connect the fuel tank, the fuel filter, and the prime mover, and is laid across the other side plate of the pair of side plates. Yes.

  According to a third aspect of the present invention, there is provided a fuel pipe structure for a construction machine, comprising: a swing frame including a pair of side plates; and an end plate that connects between end portions of the pair of side plates. A fuel tank disposed on the outside of the pair of side plates on the swing frame and at least one side plate of the pair of side plates on the swing frame. A motor that is driven using fuel, a fuel piping member that connects the fuel tank and the motor, and an electrical harness provided on the swing frame, the fuel piping member and the electrical harness described above Is laid so as to be isolated from each other.

According to a fourth aspect of the present invention, there is provided a fuel pipe structure for a construction machine according to the third aspect, wherein the fuel pipe member is disposed along the outer edge portion of the swing frame located outside the pair of side plates. It is laid down to the vicinity of the end of the plate, and is further laid along the upper edge of the end plate across the one side plate.
According to a fifth aspect of the present invention, there is provided a fuel pipe structure for a construction machine according to the third aspect, wherein the fuel filter is disposed on the swing frame opposite to the fuel tank across the pair of side plates. With
The fuel pipe member is configured to connect the fuel tank, the fuel filter, and the prime mover, and an end portion of the side plate along an outer edge portion of the swing frame located outside the pair of side plates. It is laid to the vicinity, is further laid along the upper edge of the end plate across the one side plate, and is also laid over the other side plate of the pair of side plates. It is said.

According to the fuel piping structure of the construction machine of the present invention, the fuel hose laying workability can be remarkably improved. In other words, by laying the fuel piping member along the outer edge of the swing frame and the upper edge of the end plate, it is possible to facilitate the laying work of the fuel piping member and prevent the strength of the side plate from being lowered. Become.
Further, a fuel filter disposed on the side of the swing frame opposite to the fuel tank is provided with respect to the pair of side plates, and the fuel piping member is configured to connect the fuel tank, the fuel filter, and the prime mover. In addition, even when the fuel pipe member is further laid across the other side plate of the pair of side plates, the fuel filter, the prime mover, and the fuel tank are spaced apart. The laying operation of the fuel piping member can be improved without causing a decrease in the strength of the side plate by laying the fuel piping member.

  Even when both the fuel piping member and the electrical harness are laid on the swing frame, the fuel piping member and the electrical harness can be separated from each other by laying them apart. Both the laying workability and the wiring workability of the electrical harness can be improved, and can contribute to the improvement of safety.

  Hereinafter, a fuel piping structure of a construction machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view schematically showing the configuration and explaining a route for laying a fuel hose. FIG. 2 is a block diagram schematically showing the structure, and FIG. 3 is a perspective view schematically showing the structure and explaining the laying route of the fuel hose and the electrical harness. In the present embodiment, a hydraulic excavator will be described as an example of the construction machine.

  First, as shown in FIG. 1, a swing frame 1 that is a base of an upper swing body of a hydraulic excavator is mainly composed of a main frame 21 and skirts 22, 22. A pair of side plates 2A and 2B are juxtaposed across (longitudinal direction; directions of arrows A and B in the figure), and the strength of the swing frame 1 is maintained. Note that a working device constituted by a boom, a bucket or the like (not shown) is attached to the front end (the end on the arrow A side in the figure) of the swing frame 1.

Further, cross members 3A, 3B, 3C are provided between the pair of side plates 2A, 2B to support the pair of side plates 2A, 2B. Of these cross members 3A, 3B, and 3C, the cross member 3C that supports the back end portions of the side plates 2A and 2B by combining them is called an end plate 3C.
Further, a fuel tank 5 for storing fuel for driving the engine (prime mover) 4 is disposed outside (on the arrow D side; right side) one of the side plates 2A and 2B on the swing frame 1. In addition, on the side opposite to the fuel tank 5 (arrow C side; left side, that is, outside the other side plate 2B on the swing frame 1), water in the fuel is removed or the fuel is filtered. A fuel filter 6 is disposed. The fuel tank 5 may be disposed on the left side of the swing frame 1 and the fuel filter 6 may be disposed on the right side of the swing frame 1.

The engine 4 is mounted on the swing frame 1 so as to straddle one side plate 2A of the pair of side plates 2A and 2B.
Further, on the swing frame 1, a first fuel hose (fuel piping member) 7A for connecting the fuel tank 5 and the engine 4 and a second fuel hose (fuel piping) for connecting the fuel tank 5 and the fuel filter 6 are provided. Member) 7B and a third fuel hose (fuel piping member) 7C for connecting the fuel filter 5 and the engine 4 are laid. In addition, these fuel piping members 7A-7C are made of synthetic rubber.

  As shown in FIG. 2, the second fuel hose 7 </ b> B feeds fuel stored in the fuel tank 5 to the fuel filter 6, and the third fuel hose 7 </ b> C receives moisture from the fuel filter 6. Is removed and the filtered fuel is supplied to the engine 4, and the first fuel hose 7 </ b> A returns the fuel overflowed in the engine 4 into the fuel tank 5.

  Further, the first to third fuel hoses 7A, 7B, and 7C are respectively provided by clips 8A provided on the outer edge of the swing frame 1 on the right side (in the direction of arrow D) from the fuel tank 5, as shown in FIG. While being held, the swing frame 1 is laid along the right edge of the swing frame 1 toward the rear of the swing frame 1 (in the direction of arrow B in the figure), and while being held by the clip 8B provided at the rear outer edge of the swing frame 1, It is laid along the rear edge of the frame 1.

And even in a location (see arrow E in the figure) that crosses one side plate 2A of the side plates 2A, 2B, the side plate 2A is straddled without forming a hole for laying the fuel hose on the side plate 2A. Thus, the fuel hoses 7A and 7B are laid along the upper edge of the end plate 3C.
Similarly, in the side plates 2A and 2B that cross the other side plate 2B (see the arrow F in the figure), the side plate 2B is not formed in the side plate 2B without forming a hole for laying the fuel hose. Fuel hoses 7B and 7C are laid along the upper edge of the end plate 3C so as to straddle.

  That is, the fuel hose 7A, 7B, 7C (fuel piping member) is configured to connect the fuel tank 5, the fuel filter 6 and the engine 4 and is located outside the pair of side plates 2A, 2B. 1 is laid to the vicinity of the rear end portion of the side plates 2A and 2B along the outer edge portion 1 and further straddles at least one side plate (here, the side plate 2A) of the pair of side plates 2A and 2B. It is laid along the upper edge of the plate 3C, and straddles the other side plate (here, the side plate 2B) of the pair of side plates. This eliminates the need for drilling holes in the side plates 2A and 2B for laying the fuel hoses 7A, 7B and 7C, so that the rigidity of the side plates 2A and 2B is not lowered, and the fuel hose The fuel hoses 7A, 7B, and 7C can be easily laid while reducing the processing cost and labor for forming the holes for laying.

In general, since a long fuel hose is about 6 m or longer, it takes a lot of work to pass such a long fuel hose through a hole for laying the fuel hose. Further, as described above with reference to FIG. 4, since the cap is provided at the tip of the fuel hose, it is very difficult to pass the fuel hose through the hole for laying the fuel hose, and the laying workability is poor. .
On the other hand, according to the present embodiment, the work of passing the fuel hoses 7A, 7B, 7C through the holes for laying the fuel hose can be eliminated, so that the workability can be greatly improved and the swing frame can be easily obtained. Fuel hoses 7A, 7B, 7C can be laid on 1.

Incidentally, harnesses for various electrical equipment are also laid on the swing frame 1. This is shown in FIG. FIG. 3 is basically the same as the diagram shown in FIG. 1, but differs from FIG. 1 in that it also shows that the electrical harness 9 is laid on the swing frame 1.
The electrical harness 9 is wired through a central portion of the swing frame 1 from a relay box (not shown) connected to a battery (not shown) to each electrical equipment (not shown). The electrical equipment includes, for example, an unillustrated cell motor for starting an engine, a hydraulic pump for generating hydraulic pressure, a fuel level sensor for detecting the remaining amount of fuel in the fuel tank, and fuel stored in a drum can. A fuel transfer pump (fuel transfer pump) that sucks into a fuel tank.

  These electrical harnesses 9 are not laid along the outer edge of the swing frame 1 as in the fuel hoses 7A, 7B, 7C described above, but instead of the electrical harnesses 9 drilled in the side plates 2A, 2B. It is laid through the center of the swing frame 1 through holes (harness laying holes) 10A, 10B for laying, and the fuel hoses 7A, 7B, 7C and the electrical harness 9 are laid separately on the swing frame 1. It has come to be.

  The reason why the electrical harness 9 is laid in such a route is that the outer diameter of the electrical harness 9 is smaller than the outer diameter of the fuel hoses 7A, 7B, and 7C, and therefore the side plates 2A and 2B and the side member 3A. , 3B or the like, even if the harness laying holes 10A and 10B are formed, the hole diameter may be relatively small, and the strength of the members such as the side plates 2A and 2B and the cross members 3A and 3B may be reduced. For no reason.

  Also, the wiring route of the electrical harness 9 can be considered to straddle the side plates 2A, 2B as in the case of the fuel hoses 7A, 7B, 7C described above, but the electrical harness 9 is connected to the fuel hose 7A. , 7B, and 7C, the rigidity is very low. Therefore, a large number of fixing members such as clips are required for wiring along the end plate 3C across the side plates 2A and 2B. There is also a reason to avoid this situation.

  As described above, the fuel hoses 7A, 7B, and 7C are laid along the outer edge of the swing frame 1 and the electrical harness 9 is laid so as to run vertically through the swing frame 1, whereby the fuel hoses 7A and 7B. , 7C and the wiring harness 9 can be routed differently so that the fuel hoses 7A, 7B, 7C and the wiring harness 9 can be separated and wired. , 7C laying workability and wiring workability of the electrical harness 9 can be improved, and can contribute to improvement of safety.

Since the present embodiment is configured as described above, the following operations and effects can be obtained.
First, the first and second fuel hoses 7A and 7B are held by the clip 8A provided on the outer edge of the swing frame 1 on the right side (in the direction of arrow D in the figure) from the fuel tank 5, respectively. The first and second fuel hoses can be laid along the right edge of the frame 1 toward the rear of the swing frame 1 (in the direction of arrow B in the figure), and the first and second fuel hoses are provided by a clip 8B provided at the rear outer edge of the swing frame. Since it is held, it can be laid along the rear edge of the swing frame 1. Similarly, since the second and third fuel hoses 7B and 7C are held by the clips 8C and 8D, they can be laid along the rear edge of the swing frame 1 from the fuel filter 6, respectively.

  As a result, the fuel hose 7A and the fuel hose 7A, so as to straddle the side plates 2A and 2B, without drilling a hole for laying the fuel hose in the side plates 2A and 2B, even at locations crossing the side plates 2A and 2B By laying 7B and 7C, the processing cost and labor for forming the hole for laying the fuel hose can be reduced without reducing the rigidity of the members such as the side plates 2A and 2B.

In addition, since it is not necessary to pass the fuel hoses 7A, 7B, and 7C through the holes for laying the fuel hoses, the workability is improved and the fuel hoses 7A, 7B, and 7C are easily laid on the swing frame 1. can do.
The electrical harness 9 is not laid along the outer edge of the swing frame 1 like the fuel hoses 7A, 7B, 7C, but is formed in the harness laying holes formed in the side plates 2A, 2B. 10A, 10B, the fuel hose 7A, 7B, 7C and the electrical harness 9 are routed differently to separate the fuel hose 7A, 7B, 7C and the electrical harness 9 from each other. Thus, the laying workability of the fuel hoses 7A, 7B, and 7C and the wiring workability of the electrical harness 9 can be improved, and further, the safety can be improved.

Thus, according to the fuel piping structure of the construction machine according to the present embodiment, the first fuel hose 7A and the second fuel hose 7B are laid along the outer edge of the swing frame 1 and the upper edge of the end plate 3C. It is possible to improve the workability of laying the fuel hose and prevent the strength of the side plates 2A and 2B from being lowered.
Further, by laying the second fuel hose 7B and the third fuel hose 7C along the upper edge of the end plate 3C, the operability of laying the fuel hose is improved and the strength of the side plates 2A, 2B is reduced. It becomes possible to prevent.

  Further, by laying the first fuel hose 7A and the second fuel hose 7B along the outer edge of the swing frame 1 and the upper edge of the end plate 3C, the fuel hose laying workability is improved and the electrical equipment harness 9 is provided. By laying through the vicinity of the center of the swing frame 1, the first fuel hose 7A and the electrical harness 9 can be laid apart.

  Further, by laying the second fuel hose 7B and the third fuel hose 7C along the upper edge of the end plate 3C, the fuel hose laying workability is improved and the electrical harness 9 is connected to the center of the swing frame 1. By laying through the vicinity, the second fuel hose 7B and the third fuel hose 7C and the electrical harness 9 can be laid apart.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, a hydraulic excavator is described as an example of the construction machine. However, the construction machine can be applied to any construction machine as long as it has a swing frame.

Further, in the above-described embodiment, the case where a synthetic rubber fuel hose is applied as the fuel piping member has been described as an example. However, a fuel pipe such as a metal pipe may be applied.
In the above-described embodiment, the case where the fuel filter is disposed on the swing frame on the side opposite to the fuel tank has been described as an example. The fuel filter may be disposed on a swing frame on the same side as the fuel tank. In this case, the fuel hose is laid so as to straddle only one side plate of the pair of side plates.

  In the above embodiment, the fuel hose is laid along the outer edge of the swing frame and the electrical harness is wired at the center of the swing frame as an example. The wiring hose is not limited to the wiring route, and the fuel hose and the electrical harness only need to be separated from each other by laying the fuel hose laying route and the electrical harness wiring route differently.

It is a perspective view for demonstrating the laying route of a fuel hose while showing typically the composition of the construction machine concerning one embodiment of the present invention. It is a block diagram showing typically the composition of the fuel piping structure of the construction machine concerning one embodiment of the present invention. It is a perspective view for explaining the laying route of the fuel hose and the electrical equipment harness while schematically showing the fuel piping structure of the construction machine according to one embodiment of the present invention. It is a perspective view which shows typically the fuel piping structure of the conventional construction machine. It is a perspective view which shows typically the fuel piping structure of the conventional construction machine, Comprising: It is a perspective view for demonstrating the laying route | route of the electrical equipment harness. (A), (B) is a schematic diagram which respectively shows the shape of the nozzle | cap | die of a fuel hose.

Explanation of symbols

1 Swing frame 2A, 2B Side plate 3C End plate 4 Engine (motor)
5 Fuel tank 6 Fuel filter 7A First fuel hose (fuel piping member)
7B Second fuel hose (fuel piping member)
7C 3rd fuel hose (fuel piping member)

Claims (5)

In the fuel piping structure of construction machinery,
A swing frame comprising a pair of side plates and an end plate for connecting between the ends of the pair of side plates;
A fuel tank disposed outside the pair of side plates on the swing frame;
A prime mover that is disposed across at least one side plate of the pair of side plates of the side plate on the swing frame and is driven by using fuel in the fuel tank;
A fuel pipe member connecting the fuel tank and the prime mover;
The fuel piping member is laid to the vicinity of the end of the side plate along the outer edge of the swing frame located outside the pair of side plates, and straddles the one side plate, and further the end plate A fuel pipe structure for a construction machine, wherein the fuel pipe structure is laid along an upper edge of the machine. A fuel filter disposed on the side of the swing frame opposite to the fuel tank with respect to the pair of side plates;
The fuel piping member is configured to connect the fuel tank, the fuel filter, and the prime mover, and is laid across the other side plate of the pair of side plates. The fuel piping structure of the construction machine according to 1. In the fuel piping structure of construction machinery,
A swing frame comprising a pair of side plates and an end plate for connecting between the ends of the pair of side plates;
A fuel tank disposed outside the pair of side plates on the swing frame;
A prime mover that is disposed across at least one side plate of the pair of side plates on the swing frame and is driven by using fuel in the fuel tank;
A fuel piping member connecting the fuel tank and the prime mover;
With an electrical harness provided on the swing frame,
A fuel pipe structure for a construction machine, wherein the fuel pipe member and the electrical harness are laid so as to be isolated from each other. The fuel piping member is laid to the vicinity of the end of the side plate along the outer edge of the swing frame located outside the pair of side plates, and further across the one side plate, the end plate The fuel piping structure for a construction machine according to claim 3, wherein the fuel piping structure is laid along an upper edge of the construction machine. A fuel filter disposed on the swing frame opposite to the fuel tank with the pair of side plates interposed therebetween;
The fuel pipe member is configured to connect the fuel tank, the fuel filter, and the prime mover, and an end portion of the side plate along an outer edge portion of the swing frame located outside the pair of side plates. It is laid to the vicinity, is further laid along the upper edge of the end plate across the one side plate, and is also laid over the other side plate of the pair of side plates. The fuel piping structure for a construction machine according to claim 3.

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