JP6023913B2 - Excavator - Google Patents

Description

  The present invention relates to a hydraulic excavator.

  2. Description of the Related Art Conventionally, as a small hydraulic excavator, a canopy specification that is operated by an operator while being opened to the outside is known (see, for example, Patent Document 1). In recent years, in such excavators, information from various sensors installed in the main part of the vehicle body is acquired and processed through the vehicle body network, and the results are displayed on a monitor, or the information is transmitted to the management center wirelessly. In addition, necessary information is received from the management center. For this purpose, electrical components including a processing device and a communication terminal are mounted on the hydraulic excavator.

  Such electrical parts are mounted in a concentrated manner between the left and right support columns constituting the canopy behind the operator seat due to restrictions on the mounting space in the vehicle body. In addition, because of the necessity of protecting the electrical components from rainwater and dust, a cover that covers the electrical components from above is installed between the columns.

JP 2005-350911 A

  However, since the cover that covers the electrical component is only fixed to the vehicle body by bolts or the like, it is determined that the cover can be easily removed, and the expensive electrical component may be stolen.

  An object of the present invention is to provide a hydraulic excavator that can suppress theft of electrical components.

  The hydraulic excavator of the present invention is a hydraulic excavator having a canopy, and is inserted through an electrical component disposed behind a seat back, a cover covering the electrical component, and an opening provided in the cover, A distal end side is provided on the outside of the cover so as to face a back surface of the seat back, and a proximal end side is provided with a bracket attached to a support frame on the inside of the cover.

  According to the present invention, in order to remove the cover covering the electrical component, it is necessary to remove the cover from the bracket inserted through the opening, in addition to the operation of loosening a bolt or the like conventionally used. At this time, since the portion of the bracket that faces the seat back is located between the seat back and the cover, it is difficult to understand the presence of the bracket. Therefore, it is not possible to remove the cover only by loosening the bolts and the like, and the theft of electrical components can be suppressed.

In the hydraulic excavator of the present invention, it is preferable that a back surface of the seat back is in contact with a tip of the bracket.
In the hydraulic excavator of the present invention, the bracket includes a first member on a proximal end side and a second member on a distal end side joined to the first member by a bolt, and the head portion of the bolt is It is preferable to be located inside the cover.

  In the hydraulic excavator of the present invention, the support frame includes a partition plate that partitions a space inside the cover, and one space partitioned by the partition plate communicates with the outside through the opening, and the other space. It is preferable that the electrical component is located inside.

1 is a side view showing a hydraulic excavator according to an embodiment of the present invention. The top view which shows the cab of a hydraulic excavator. The perspective view which shows the cover and electrical component which are mounted in a hydraulic excavator. FIG. 4 is a cross-sectional view of the cover, and is a cross-sectional view taken along arrow IV-IV in FIG. 3.

[Schematic configuration of hydraulic excavator]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a hydraulic excavator 1 according to the present embodiment. In FIG. 1, a hydraulic excavator 1 includes a crawler type lower traveling body 2 driven by a hydraulic motor, an upper revolving body 3 that is pivotably provided on an upper portion of the lower traveling body 2, and a front side of the upper revolving body 3. And a working machine 4 for excavating earth and sand, etc., and is configured as a small hydraulic excavator.

  Of these, the upper swing body 3 includes a revo frame 31 provided with a swing hydraulic motor (not shown) at substantially the center. The revo frame 31 is provided with the working machine 4, a cab 32 on which an operator gets on, and a counterweight 33 in order from the front side to the rear side. In addition, the revo frame 31 is provided with a canopy 34 that covers the cab 32 from above.

  Here, the canopy 34 includes a pair of pillars 34A standing up and down on the left and right sides, and a roof 34B supported by the upper ends of the pillars 34A. The lower end of the column 34A is supported by a support plate 33A located on the upper portion of the engine (not shown). Such a support plate 33 </ b> A is installed between the upper ends of the left and right support columns 33 </ b> B standing on the counterweight 33.

  Although not shown, a control valve that distributes the pressure oil pumped from the hydraulic pump driven by the engine to the lower traveling body 2 and the work implement 4 below the cab 32 in the revo frame 31. Has been placed. On the right side of the cab 32, tanks such as a fuel tank, a hydraulic oil tank, and a sub tank for engine cooling water are arranged. In the present embodiment, front, rear, left, and right are directions based on an operator seated on the cab 32.

  The work machine 4 includes a boom 41 attached to the revo frame 31 so as to swing up and down, an arm (not shown) attached to the tip of the boom 41 so as to swing up and down, and attached to the tip of the arm so as to swing up and down. And an unillustrated bucket. The boom 41, the arm, and the bucket are connected to the tip of a cylinder rod of the boom cylinder 41A, which is a hydraulic cylinder, the arm cylinder, and the bucket cylinder, respectively, and each cylinder rod is expanded and contracted by the pressure oil from the control valve. Oscillates.

  Furthermore, in this embodiment which is a small hydraulic excavator 1, a blade 42 is provided at the front portion of the track frame 21 of the lower traveling body 2 as another working machine. The blade 42 is operated by a blade cylinder (not shown). The blade cylinder also expands and contracts with the pressure oil from the control valve.

[Composition of cab]
FIG. 2 shows a plan view of the cab 32 of the excavator 1. 1 and 2, the cab 32 includes an operator seat 35 disposed substantially at the center, a console box 36 disposed on the left and right of the operator seat 35, and a work machine provided at the front of each console box 36. In front of the lever 37 and the operator seat 35, a pair of travel levers 38 protruding from the floor surface under the feet, a cover 39 disposed behind the seat back 35A of the operator seat 35, and behind the seat back 35A Electrical components E1, E2, etc., which are arranged and covered with a cover 39, are provided.

  Of these, the operator seat 35 includes a reclining mechanism, and the seat back 35A can tilt forward and backward. The cover 39 covers the electrical components E1, E2 and the like, thereby protecting them from rain water and dust. The electrical components E1 and E2 are configured from a processing device that processes information from various sensors installed in the main part of the vehicle body, a communication terminal that communicates with the management center, and the like, for example, installed on the support plate 33A described above. The

[Composition of cover]
FIG. 3 shows a perspective view of the cover 39. 2 and 3, the cover 39 is made of synthetic resin. The cover 39 has a left concave portion 39A whose left end is located inside the column 34A of the canopy 34 and is recessed rightward so as to avoid the column 34A. On the other hand, the cover 39 has a right concave portion 39B that is recessed from the front to the rear so that the right end of the cover 39 extends to the outside of the column 34A and avoids the column 34A. Further, the cover 39 is low on both side portions, but the center portion located between the pillars 34A bulges upward, and the bulged portion covers the electrical components E1 and A2.

  The front surface portion of the bulging portion is provided adjacent to the seat back 35A of the operator seat 35, and a substantially rectangular opening 39C opened at a predetermined opening area is provided at a position closer to the left side of the front surface portion. A bracket 55 is inserted through the opening 39C. The bracket 55 will be described later. Such a cover 39 includes the above-described support plate by a pair of bolts 39D inserted into positions separated from each other along the rear edge and a bolt 39D inserted into the front side of the cup holder 39E provided on the right side. It is attached to 33A (see FIG. 1) or the like.

  The bolt 39D may be a normal bolt having a hexagonal head, but at least one bolt is preferably a bolt having a specially shaped head. By doing so, it is difficult to remove the cover, and the antitheft effect of the electrical components E1, E2 is enhanced.

[Support structure for electrical components]
As shown in FIGS. 2 and 3, the electrical components E <b> 1 and E <b> 2 are supported on a support plate 33 </ b> A (see FIG. 1) or the like via a support frame 51 configured with a metal plate or the like. The support frame 51 includes a substrate 52 fixed to the support plate 33A, a mounting plate 53 erected on the substrate 52 so that the front and back surfaces face front and rear, and a left side of the substrate 52 so that the front and back surfaces face left and right. A partition plate 54 erected at the position and a bracket 55 provided on the left side surface of the partition plate 54 are provided.

  A sealing material 56 such as urethane resin is attached to the outer edges of the substrate 52 and the partition plate 54, the electrical component E1 is attached to the front surface of the mounting plate 53, and the electrical component E2 is attached to the rear surface. The partition plate 54 partitions the internal space of the bulging portion of the cover 39 to the left and right. The space on the left side partitioned by the partition plate 54 communicates with the outside through the opening 39C. The electrical components E1 and E2 are located in the right space.

  In a state where the electrical components E1 and E2 are covered with the cover 39, the gap between the outer edge of the partition plate 54 and the inner surface of the bulging portion of the cover 39 is blocked by the sealing material 56 attached to the partition plate 54. It is. For this reason, even if dust or rainwater or the like enters the cover 39 from the opening 39C, it does not reach the right space, and the electrical components E1 and E2 are not affected.

[Details of brackets]
The bracket 55 includes an L-shaped first member 551 on the base end side which is joined to the partition plate 54 by welding or the like, and a second member on the distal end side joined to the first member 551 with a bolt 55A and a nut 55B. 552. Of these, the second member 552 is further formed into an L shape and attached to the first member 551, and the attachment piece 553 is welded to an inclined edge substantially parallel to the opening surface of the opening 39C by welding or the like. A buffer member 555 made of synthetic resin is affixed to the entire surface of the contact piece 554.

  Such a bracket 55 is inserted into the opening 39 </ b> C, and the first member 551 on the base end side is located inside the cover 39 in addition to the bolt 55 </ b> A and the nut 55 </ b> B. A part of the attachment piece 553 constituting the second member 552 is located inside the cover 39, and the other part is located outside the cover 39. The entire contact piece 554 and the buffer member 555 are located outside the cover 39.

  On the outside of the cover 39, the shock absorbing member 555 on the front end side faces the back surface of the seat back 35A of the operator seat 35. The back surface of the seat back 35A comes into contact with the buffer member 555 when the seat back 35A is tilted backward at a predetermined angle, and the reclining amount of the seat back 35A toward the rear side is regulated.

  Furthermore, the size of the outer edge of the contact piece 554 and the buffer member 555 provided on the front end side of the bracket 55 is larger than the size of the inner edge of the opening 39C. When the cover 39 is to be removed, it is necessary to remove the second member 552 of the bracket 55 so that the opening 39C is not caught by the bracket 55 in addition to removing the bolt 39D fixing the cover 39 as a whole. .

  However, the presence of the bracket 55 is difficult to understand because it is hidden behind the seat back 35A, and in order to remove the bracket 55, a bolt 55A and a nut 55B located inside the cover 39 are inserted through the opening 39C. By removing, it is necessary to separate the first and second members 551 and 552, which is not easy.

[Effect of the embodiment]
According to the hydraulic excavator 1 of the present embodiment described above, the bracket 55 facing the seat back 35A is inserted into the opening 39C of the cover 39, so that the cover 39 can be hardly removed and the theft of electrical components can be suppressed. The effects of the present invention can be achieved.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described embodiment, the support frame 51 that supports the electrical components E1 and E2 has the partition plate 54 that partitions the internal space of the cover 39. However, even if there is no such partition plate 54, the present invention can be applied to the present invention. included. In this case, a bracket having a long length may be prepared as the first member, and its lower end may be directly fixed to the substrate 52 or the like. In addition, in consideration of prevention of dust and rainwater intrusion, the entire opening is closed with a planar sealing material from the inside of the cover, and a linear slit is provided in such a sealing material, and the bracket is inserted through the slit. You may let them.

  In the above-described embodiment, the bolt 55A and the nut 55B used in the bracket 55 are located inside the cover 39. However, these bolts and nuts are outside the cover and are, for example, contact pieces of the second member. It may be located in a place where it is difficult to see and operate.

  In the above embodiment, the bracket 55 is used as a regulating member that regulates the reclining amount of the seat back 35A. However, the bracket according to the present invention may be provided as a dedicated member for making it difficult to remove the cover.

  The present invention can be suitably used particularly for a small hydraulic excavator with a canopy specification.

DESCRIPTION OF SYMBOLS 1 ... Hydraulic excavator, 34 ... Canopy, 35A ... Seat back, 39 ... Cover, 39C ... Opening, 51 ... Support frame, 54 ... Partition plate, 55 ... Bracket, 55A ... Bolt, 551 ... First member, 552 ... First Two members, E1, E2 ... Electrical components.

Claims (4)

A hydraulic excavator having a canopy,
Electrical components placed behind the seat back;
A cover covering the electrical component;
A bracket that is inserted through an opening provided in the cover, has a distal end protruding from the opening to the outside of the cover and facing the back of the seat back, and a proximal end attached to a support frame inside the cover A hydraulic excavator characterized by comprising: The hydraulic excavator according to claim 1,
The excavator, wherein a back surface of the seat back is in contact with a front end of the bracket. The hydraulic excavator according to claim 1 or 2,
The bracket includes a proximal-side first member and a distal-side second member joined to the first member by a bolt,
A head of the bolt is located inside the cover. A hydraulic excavator having a canopy,
Electrical components placed behind the seat back;
A cover covering the electrical component;
A bracket that is inserted through an opening provided in the cover, has a distal end facing the back of the seat back on the outside of the cover, and a base end attached to a support frame on the inside of the cover;
The support frame includes a partition plate that partitions a space inside the cover,
A hydraulic excavator, wherein one space partitioned by the partition plate communicates with the outside through the opening, and the electrical component is located in the other space.

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