JP2014047463A - Electric product mounting structure for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a risk for the theft of electric products without impairing maintainability, by devising a mounting structure for the electric products.SOLUTION: A protecting cover 60 has a cylindrical mounting part 62 in which insertion hole 62a is formed with its inner diameter larger than the outer diameter of a fuel filler cylinder body 26 of a fuel tank 25 and smaller than the outer diameter of a fuel filler cap 27. The fuel filler cylinder body 26 is inserted through the insertion hole 62a and the fuel filler cap 27 is mounted and locked to the fuel filler cylinder body 26. Then, the fuel filler cap 27 restricts the removal of the protecting cover 60 from the fuel tank 25.

Description

  The present invention relates to an electrical component mounting structure for a construction machine.

  2. Description of the Related Art Conventionally, a construction machine is known that includes a lower traveling body, an upper swing body mounted on the lower traveling body, and a cab disposed on the left side of the upper swing body (see, for example, Patent Document 1). ). In this construction machine, a camera for checking safety on the right side of the upper swing body in the cab is attached to the right side of the vehicle. Here, in consideration of maintainability and ease of assembly, it is a general mounting structure that the camera is fastened and fixed to the machine room cover on the right side of the upper swing body by a fastening bolt or the like.

JP 2010-198519 A

  However, in the conventional construction machine camera mounting structure, the camera can be easily attached and detached simply by removing the fastening bolts, etc., so the construction machine parked at the construction site is stolen for resale purposes. There was a problem.

  The present invention has been made in view of such a point, and the object thereof is to devise the mounting structure of the electrical component, so that the risk of the electrical component being stolen can be reduced without impairing maintainability. There is.

  The present invention relates to a construction machine including a lower traveling body, an upper swing body mounted on the lower traveling body, a fuel tank mounted on the upper swing body, and an electrical component disposed on the fuel tank. The following solutions were taken for the electrical equipment mounting structure.

That is, according to the first aspect of the present invention, the fuel tank is provided with an oil supply cylinder having an opening of an oil supply port,
An oil filler cap having a cap portion detachably attached to a tip portion of the oil supply cylinder so as to close the oil supply opening, and a lock portion for locking the cap part so as not to be detached from the oil supply cylinder; ,
An electrical component protection unit that covers the electrical component; and a protective cover that includes an attachment portion in which an insertion hole having an inner diameter that is larger than the outer diameter of the oil supply cylinder and smaller than the outer diameter of the oil filler cap is formed. ,
The protective cover is removed from the fuel tank by the fuel filler cap in a state where the fuel filler cylinder is inserted into the insertion hole of the attachment portion and the fuel filler cap is attached to the fuel cylinder and locked. In the first invention, the protective cover of the electrical component is larger than the outer diameter of the fuel tank cylinder of the fuel tank and outside the filler cap. An insertion hole having an inner diameter smaller than the diameter is formed. When the oil supply cylinder is inserted into the insertion hole and the oil supply cap is attached to the oil supply cylinder and locked, the removal of the protective cover from the fuel tank is restricted by the oil supply cap.

  With such a configuration, it is possible to reduce the risk of electrical components being stolen without impairing maintainability. Specifically, when removing the electrical component from the fuel tank, it is necessary to remove the protective cover from the fuel supply cylinder after unlocking the lock portion of the fuel filler cap and removing the fuel filler cap. As a result, the risk of electrical components being stolen for resale purposes while parked at a construction site can be reduced. In addition, since the lock portion of the filler cap is originally provided to prevent theft of fuel, it can be used as a lock mechanism for the protective cover, so that no additional cost is required and maintenance is impaired. Absent.

According to a second invention, in the first invention,
The protective cover includes a wiring protection portion that extends along a wiring direction of the electrical wiring connected to the electrical component and covers the electrical wiring.

  In 2nd invention, the electrical wiring connected to the electrical component is covered with the wiring protection part of the protective cover extended along the wiring direction. With such a configuration, it is possible to protect the electrical wiring of the electrical component from getting wet by rainwater or the like.

According to a third invention, in the first or second invention,
The protective cover is provided with a waste oil groove which is recessed along the periphery of the oil supply cylinder and whose groove end is open toward the outside of the vehicle.

  In the third invention, the protective cover is provided with a waste oil groove. The waste oil groove is recessed along the periphery of the oil supply cylinder, and the end of the groove opens toward the outside of the vehicle.

  With this configuration, when fuel is supplied from the fuel supply port of the fuel tank, even if the fuel leaks around the fuel supply cylinder, the fuel is guided to the outside of the vehicle from the waste oil groove of the protective cover. Therefore, fuel does not stay on the upper surface of the protective cover.

According to a fourth invention, in any one of the first to third inventions,
A cab mounted on one end side in the vehicle width direction of the upper swing body,
The fuel tank is mounted on the other end side in the vehicle width direction of the upper swing body,
The electrical component includes a monitoring camera for monitoring a side of the upper swing body.

  In the fourth invention, a cab is mounted on one end side of the upper turning body in the vehicle width direction, and a fuel tank is mounted on the other end side. The electrical component is a monitoring camera, and the side of the upper swing body is monitored.

  With such a configuration, by applying the electrical component mounting structure of the present invention to the surveillance camera for side surveillance, it becomes difficult to remove the surveillance camera, and there is a risk that the surveillance camera will be stolen for resale purposes. Can be reduced.

  According to the present invention, it is possible to reduce the risk of electrical components being stolen without impairing maintainability. Specifically, when removing the electrical component from the fuel tank, it is necessary to remove the protective cover from the fuel supply cylinder after unlocking the lock portion of the fuel filler cap and removing the fuel filler cap. As a result, the risk of electrical components being stolen for resale purposes while parked at a construction site can be reduced. In addition, since the lock portion of the filler cap is originally provided to prevent theft of fuel, it can be used as a lock mechanism for the protective cover, so that no additional cost is required and maintenance is impaired. Absent.

1 is a side view showing an overall configuration of a construction machine according to an embodiment of the present invention. It is a top view which shows the whole structure of a construction machine. It is a plane sectional view showing the composition of a protective cover. It is side surface sectional drawing which shows the structure of a protective cover. It is XX arrow sectional drawing of FIG. 4 which shows the structure of the lock part of a protective cover. It is side surface sectional drawing which shows the state which removed the protective cover.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a side view showing the overall configuration of a construction machine according to an embodiment of the present invention, and FIG. 2 is a plan view. As shown in FIGS. 1 and 2, the construction machine 10 is a hydraulic excavator in which an upper revolving body 12 that can be turned is mounted on a crawler type lower traveling body 11.

  The upper swing body 12 is provided on the rear end side of the swing frame 13, the attachment 14 that is provided on the front end side of the swing frame 13 and performs excavation work such as earth and sand, the cab 15, the machine room 16, and the swing frame 13. And a counterweight 21 for balancing the weight with the attachment 14.

  In this embodiment, in FIG. 1, the side on which the attachment 14 on the left side of the drawing is arranged is the front side of the vehicle, and the side on which the cab 15 on the front side of the paper is arranged is the left side of the vehicle. Shall follow unless otherwise stated. Moreover, in FIG. 2, the description of the lower traveling body 11 and the attachment 14 is omitted.

  The attachment 14 has a boom 14a pivotally attached to a pair of vertical plates 13a (see FIG. 2) provided on the revolving frame 13 on the base end side, and an arm pivotally attached to the distal end side of the boom 14a. 14b and a bucket 14c rotatably attached to the distal end side of the arm 14b.

  The cab 15 is a rectangular box type cab equipped with an operation seat, various control devices, operation devices, and the like, and is located on the left side of the front of the upper swing body 12 so as to be adjacent to the left side of the attachment 14. It is arranged.

  The periphery of the machine room 16 is covered with a machine room cover 20. A cooler 18 and an engine 19 are disposed in front of the vehicle with respect to the counterweight 21 in the machine room 16.

  A hydraulic oil tank 31 for storing hydraulic oil is disposed on the right side of the attachment 14. A fuel tank 25 for storing fuel is disposed on the front side of the hydraulic oil tank 31. On the front side of the fuel tank 25, a trunk room 33 capable of storing equipment and the like is disposed. A step stool 34 is provided at a portion of the swivel frame 13 located in the lower front part of the trunk room 33 so as to protrude forward. And in order to assist an operator's raising / lowering, the handrail 35 is provided so that it may extend in the front-back direction.

  A rectangular maintenance hole 20 a through which the engine 19 can be visually recognized is formed on the upper surface of the machine room cover 20. The maintenance hole 20a is closed by a bonnet 40 so as to be opened and closed. The bonnet 40 is a dome-shaped member whose periphery is formed slightly larger than the maintenance hole 20a. The bonnet 40 is supported through a hinge 40a so as to be opened and closed. The bonnet 40 is provided with a lock member 41 for locking the opening / closing operation.

  Here, by opening the bonnet 40, the maintenance hole 20a is opened, and the operator can perform work such as periodic inspection of the engine 19 through the maintenance hole 20a. Below the maintenance hole 20a, inspection parts that are regularly performed are arranged in a concentrated manner so that the inspection work can be performed efficiently.

  A monitoring camera 50 as an electrical component is disposed on the upper portion of the fuel tank 25. The monitoring camera 50 is for monitoring the right side of the upper swing body 12 and is covered with a protective cover 60.

  FIG. 3 is a plan sectional view showing the structure of the protective cover, and FIG. 4 is a side sectional view. As shown in FIGS. 3 and 4, an upper portion of the fuel tank 25 is provided with an oil supply cylinder 26 having an oil supply port 26 a that extends upward. An oil filler cap 27 that closes the oil filler 26 a is detachably attached to the tip of the oil filler cylinder 26. A boss portion 28 is welded to the upper portion of the fuel tank 25 with an interval in the left-right direction. A holding member 51 is fastened and fixed to the boss portion 28 at the right end.

  The holding member 51 includes a cover bracket 51 a that holds the protective cover 60, and a camera bracket 51 b that is attached to the cover bracket 51 a and holds the monitoring camera 50.

  The cover bracket 51a is formed by bending a single plate material. Specifically, the right end portion of the flat surface in contact with the boss portion 28 is bent upward and the upper end portion thereof is bent rightward. The lower flat surface of the cover bracket 51 a is fastened and fixed to the boss portion 28 by fastening bolts 55. A weld nut 56 is welded to the lower surface side of the upper flat surface of the cover bracket 51a.

  The camera bracket 51b is formed of a plate material bent into a concave cross-section with an opening on the right side of the vehicle in plan view, and the monitoring camera 50 is disposed in the recess. The surveillance camera 50 is fastened and fixed to the camera bracket 51b by a camera screw 57.

  The protective cover 60 is formed with a camera protection unit 61 (electrical component protection unit) that covers the monitoring camera 50 and an insertion hole 62 a having an inner diameter that is larger than the outer diameter of the fuel filler cylinder 26 and smaller than the outer diameter of the fuel filler cap 27. And a wiring protector 63 that covers the electrical wiring 50 a connected to the monitoring camera 50. The camera protection part 61, the attachment part 62, and the wiring protection part 63 are integrally formed.

  The camera protection unit 61 covers the periphery of the surveillance camera 50. In the camera protection unit 61, a window hole 61a for securing the field of view of the monitoring camera 50 is opened obliquely downward. The camera protection unit 61 is fastened to the weld nut 56 of the cover bracket 51 a by fastening bolts 55. Thereby, the camera protection part 61 of the protective cover 60 and the cover bracket 51a are fastened and fixed.

  A seal member 29 is provided at the upper end portion of the attachment portion 62. The seal member 29 seals a gap between the insertion hole 62 a of the attachment portion 62 and the fuel supply cylinder 26 of the fuel tank 25. The attachment portion 62 is restricted from moving in the axial direction by the fuel filler cap 27 in a state where the fuel filler cap 27 is attached to the fuel cylinder 26 and locked. As a result, the protective cover 60 cannot be removed from the fuel tank 25.

  The wiring protection part 63 extends along the wiring direction of the electric wiring 50a. Specifically, since the electrical wiring 50a extends toward the left side of the vehicle along the upper surface of the fuel tank 25, the wiring protection part 63 also extends from the right side of the vehicle toward the left side of the vehicle. The electrical wiring 50 a is bent downward at the left end portion of the fuel tank 25 and routed in the machine chamber 16.

  On the upper surface of the wiring protection portion 63, a mounting recess 63a that is recessed corresponding to the position where the boss portion 28 is disposed is formed. A through hole (not shown) is formed in the mounting recess 63a. The fastening bolt 55 is inserted into the through hole and fastened to the boss part 28, whereby the wiring protection part 63 and the boss part 28 of the protective cover 60 are fastened. Fixed.

  The protective cover 60 is provided with a waste oil groove 60a which is recessed along the periphery of the oil supply cylinder 26 and whose groove end opens toward the right outside of the vehicle. When fuel is supplied from the fuel supply port 26a of the fuel tank 25, even if the fuel leaks around the fuel supply cylinder 26, the fuel is guided from the waste oil groove 60a of the protective cover 60 to the right outside of the vehicle. Therefore, the fuel does not stay on the upper surface of the protective cover 60.

  The fuel filler cap 27 has a cap portion 27a that closes the fuel filler port 26a, and a lock portion 27b that locks the cap portion 27a so as not to be detached from the fuel filler cylinder 26. As shown in FIG. 5, a flange portion 26 b is provided on the inner peripheral surface of the oil supply cylinder 26 so as to protrude inward of the oil supply port 26 a. Three cutout holes 26c are formed in the flange portion 26b at intervals in the circumferential direction.

  The lock portion 27b is formed of a columnar member that is integrally formed with the cap portion 27a and inserted into the cylinder of the oil supply cylinder 26, and includes three engagement claws 27c that protrude radially outward and one lock claw. 27d.

  The engaging claws 27 c are provided at intervals in the circumferential direction corresponding to the cutout holes 26 c of the flange portion 26 b of the oil supply cylinder 26. Between adjacent engagement claws 27c, a lock claw 27d that is movable back and forth in the radial direction is provided.

  Here, when the oil filler cap 27 is attached to the oil supply cylinder 26, first, the engaging claw 27c is inserted into the cutout hole 26c, and then the oil filler cap 27 is rotated in the circumferential direction so that it can be seen in a plan view. The engaging claw 27c is overlapped with the flange portion 26b and engaged. Then, the locking claw 27d is protruded in the radial direction, and the locking claw 27d is overlapped with and engaged with the flange portion 26b in a plan view. As a result, the filler cap 27 is locked so as not to be detached from the filler cylinder 26.

  FIG. 6 is a side sectional view showing a state in which the protective cover is removed. As shown in FIG. 6, it is necessary to remove the protective cover 60 from the fuel tank 25 in order to perform angle adjustment, maintenance, and the like of the monitoring camera 50. Hereinafter, a procedure for removing the protective cover 60 will be described.

  First, the fastening bolt 55 that fastens and fixes the camera protection portion 61 of the protective cover 60 and the fastening bolt 55 that fastens and fixes the wiring protection portion 63 are loosened and removed. Then, the lock portion 27b of the filler cap 27 is unlocked, the filler cap 27 is removed from the filler cylinder 26, and the mounting portion 62 of the protective cover 60 is pulled out of the filler cylinder 26, whereby the protective cover 60 is removed from the fuel tank. 25 and the surveillance camera 50 is exposed. Thereby, angle adjustment, maintenance, etc. of the surveillance camera 50 can be performed. In addition, about the attachment procedure of the protective cover 60, since the removal procedure mentioned above should just be performed reversely, the description is abbreviate | omitted.

  As described above, according to the electrical component mounting structure of the construction machine 10 according to the present embodiment, the risk of the surveillance camera 50 being stolen can be reduced without impairing maintainability. Specifically, when removing the monitoring camera 50 from the fuel tank 25, the lock cover 27b of the filler cap 27 is unlocked and the filler cap 27 is removed, and then the protective cover 60 is removed from the filler cylinder 26. There is a need. Thereby, the risk that the surveillance camera 50 is stolen for the purpose of resale while parked at the construction site can be reduced. Further, since the lock portion 27b of the filler cap 27 is originally provided to prevent theft of fuel, it can be used as a lock mechanism for the protective cover 60, so that no additional cost is required and maintainability is impaired. It will not be.

<< Other Embodiments >>
About the said embodiment, it is good also as following structures.

  In this embodiment, although the surveillance camera 50 was illustrated and demonstrated as an electrical component protected by the protective cover 60, it is not limited to this form. For example, the present invention can be applied to other electrical components such as a light and a sensor that are likely to be stolen for resale purposes.

  As described above, the present invention has a highly practical effect of reducing the risk of electrical components being stolen without degrading maintainability by devising the mounting structure of electrical components, It is extremely useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 10 Construction machine 11 Lower traveling body 12 Upper revolving body 15 Cab 25 Fuel tank 26 Oil supply cylinder 26a Oil supply port 27 Oil supply port cap 27a Cap part 27b Lock part 50 Surveillance camera (electric equipment)
50a Electrical wiring 60 Protective cover 60a Waste oil groove 61 Camera protection part (Electrical component protection part)
62 mounting portion 62a insertion hole 63 wiring protection portion

Claims (4)

Electrical equipment mounting of a construction machine comprising a lower traveling body, an upper swing body mounted on the lower travel body, a fuel tank mounted on the upper swing body, and an electrical component disposed on the fuel tank Structure,
The fuel tank is provided with a fuel cylinder having a fuel filler opening,
An oil filler cap having a cap portion detachably attached to a tip portion of the oil supply cylinder so as to close the oil supply opening, and a lock portion for locking the cap part so as not to be detached from the oil supply cylinder; ,
An electrical component protection unit that covers the electrical component; and a protective cover that includes an attachment portion in which an insertion hole having an inner diameter that is larger than the outer diameter of the oil supply cylinder and smaller than the outer diameter of the oil filler cap is formed. ,
The protective cover is removed from the fuel tank by the fuel filler cap in a state where the fuel filler cylinder is inserted into the insertion hole of the attachment portion and the fuel filler cap is attached to the fuel cylinder and locked. An electrical component mounting structure for a construction machine, characterized in that: In claim 1,
The electrical equipment mounting structure for a construction machine, wherein the protective cover includes a wiring protection portion that extends along a wiring direction of electrical wiring connected to the electrical equipment and covers the electrical wiring. In claim 1 or 2,
An electrical component mounting structure for a construction machine, wherein the protective cover is provided with a waste oil groove that is recessed along the periphery of the oil supply cylinder and whose groove end opens toward the outside of the vehicle. In any one of claims 1 to 3,
A cab mounted on one end side in the vehicle width direction of the upper swing body,
The fuel tank is mounted on the other end side in the vehicle width direction of the upper swing body,
The electrical component mounting structure for a construction machine, wherein the electrical component includes a monitoring camera for monitoring a side of the upper swing body.

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