Revolving work vehicle

Abstract

To provide a useful work machine.SOLUTION: A revolving work vehicle 1 (work machine) is provided with a first mounting member 8 and a second mounting member 8. The first mounting member 8 and the second mounting member 8 are arranged above the roof 50r of the control part 5, which is arranged on one side of the left and right direction of the machine body in a plan view, and an antenna 6 (mounted-on-roof-object) can be detachably installed thereon. The first mounting member 8 is arranged in front of the second mounting member 8, and the second mounting member 8 is arranged on the other side of the first mounting member 8 in the left and right direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a slewing work vehicle. [Background technology]

[0002] Patent Document 1 describes a hydraulic excavator that is capable of detecting the position coordinates of the machine body by a GPS antenna. The GPS antenna is installed on the bonnet that covers the engine, but installation space is not necessarily secured on the bonnet. For example, in a small rear swing hydraulic excavator, the seat mount is located above the engine, so the GPS antenna cannot be installed on the bonnet. In such a case, from the viewpoint of securing the antenna reception level, it is preferable to install the GPS antenna on the roof where there are no obstructions around.

[0003] However, installing a GPS antenna on the roof of a hydraulic excavator can cause inconvenience when loading it onto a truck or the like for transport. Figure 6 shows the height of the hydraulic excavator 10 from the ground during transport (hereinafter referred to as the transport height) HT, which is calculated as the sum of the machine height HS of the hydraulic excavator 10 that is the load, and the bed height HC of the truck or the like. The transport height HT has an upper limit set by traffic regulations, and must be kept within the specified height limit. For this reason, if the installation of the GPS antenna causes the transport height HT to exceed the height limit, the GPS antenna must be removed before transport.

[0004] Normally, a GPS antenna is installed via a mounting member having a stay. If the stay causes the height during transportation to exceed the height limit, it is necessary to remove the mounting member along with the GPS antenna. However, while the GPS antenna is designed to be removed when not in use and can be easily attached and detached from the mounting member, the mounting member is firmly fixed since it is designed to be attached at all times, and the task of removing the mounting member from the roof is very complicated. This applies not only to GPS antennas, but also to other roof-mounted items that are similarly installed on the roof.

[0005] Patent Document 2 describes a hydraulic excavator in which an antenna is attached to a reinforcing member provided at the joint between the side beam of the cabin and the rear pillar. The antenna is configured so that it can be directed downward via a spherical rotating member. However, this is based on the premise of a rod-shaped antenna such as a radio antenna, and is not applicable to a GPS antenna. Even if it could be applied, the mounting structure would be unstable, and there is a risk that accurate coordinate detection would not be possible. Of course, this is a structure for mounting an antenna on the side wall of the cabin, and does not disclose a method for installing an antenna on the roof. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2002-181538 A [Patent Document 2] International Publication No. 2016 / 043344 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a swivel work vehicle that can be easily operated even when the height limit is exceeded due to roof-mounted objects such as antennas. [Means for solving the problem]

[0008] The working machine of the present invention is provided with a first mounting member and a second mounting member that are arranged above the roof of a control section that is arranged on one side of the left and right sides of the body in a plan view, and can be used to detachably mount an object to be installed on the roof, the first mounting member being arranged in front of the second mounting member, and the second mounting member being arranged on the other side of the left and right sides of the first mounting member.

[0009] In addition, the first mounting member and the second mounting member may be disposed inside an outer periphery of the roof in a plan view. The roof-mounted object attached to the second mounting member may overlap the outer periphery in a plan view.

[0010] The roof-mounted object attached to the second mounting member may be positioned so as to be offset to the one side with respect to the roof.

[0011] The first mounting member may be arranged so as to be shifted to the other of the left and right directions with respect to the center of the roof.

[0012] The second mounting member may be positioned so as to be offset to one side relative to a center of the roof.

[0013] The rooftop installation may be an antenna for positioning. [Brief description of the drawings]

[0014] [Figure 1] A left side view showing an example of a rotating work vehicle. [Diagram 2] FIG. 2 is a plan view showing the rotating work vehicle of FIG. [Diagram 3] A perspective view showing a roof guard [Figure 4] FIG. 1 is a perspective view showing a mounting member in an upward position; [Diagram 5] FIG. 1 is a perspective view showing a mounting member in a downward position; [Figure 6] Schematic diagram showing how to transport a hydraulic excavator DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment of the present invention will be described with reference to the drawings. As shown in Figs. 1 and 2, a revolving work vehicle 1 of this embodiment includes a lower traveling body 2, an upper revolving body 3, and a working implement 4. The revolving work vehicle 1 is configured as an excavator (backhoe) with a so-called boom swing function that swings the working implement 4 left and right relative to the upper revolving body 3, but is not limited to this. In general, a boom swing function is equipped on a mini excavator (small hydraulic excavator) that is required to be able to work in a narrow space.

[0016] The lower traveling body 2 is driven by power from the engine 30 to travel and rotate the slewing work vehicle 1. The lower traveling body 2 is equipped with a pair of left and right crawlers 21, 21 and a traveling motor 22 that drives them. The lower traveling body 2 is also provided with a pair of blade arms 23, 23, a blade 24 that serves as a blade plate extending in the left-right direction between the tips of the blade arms 23, 23, and a blade cylinder 25 that is an actuator for rotating the blade 24 up and down.

[0017] The upper rotating body 3 is provided rotatably above the lower traveling body 2. A swivel base 31 that rotatably supports the upper rotating body 3 is provided between the pair of crawlers 21, 21, and a swivel motor (not shown) drives the swivel base to rotate the upper rotating body 3. The upper rotating body 3 is formed in a generally circular plate shape in a plan view that can rotate within the width of the lower traveling body 2 (the distance between the outer edge of the left crawler 21 and the outer edge of the right crawler 21). An engine 30, a counterweight 32, etc. are arranged on the upper rotating body 3.

[0018] The work machine 4 is driven by power from the engine 30, and performs work such as excavating earth and sand in response to operation at the control unit 5. The work machine 4 has a boom 41, an arm 42, a bucket 43 which is an excavation attachment, and actuators for driving them (specifically, a boom cylinder 41c, an arm cylinder 42c, a bucket cylinder 43c, and a swing cylinder 45, which will be described later). The work machine 4 performs a swing motion in conjunction with the horizontal rotation of the boom bracket 41b, and moves horizontally relative to the upper rotating body 3.

[0019] The boom 41 extends in the vertical direction from a base end supported by a boom bracket 41b, and is bent in a boomerang shape in a side view. The boom 41 is attached to the boom bracket 41b so as to be able to rotate up and down (rotate back and forth). The base end of the boom 41 is supported so as to be able to rotate up and down around a pivot pin 41a. A boom cylinder 41c that can move telescopically is provided between the boom bracket 41b and a mid-way portion of the boom 41. The vertical rotation of the boom 41 relative to the boom bracket 41b operates in response to the telescopic movement of the boom cylinder 41c.

[0020] The boom bracket 41b is attached to the front end of the upper rotating body 3 via a stay 33 so as to be capable of horizontal rotation (swinging). The boom bracket 41b is supported so as to be capable of horizontal rotation about a pivot pin 33a provided on the stay 33. A swing cylinder 45 that expands and contracts in the front-rear direction is provided between the upper rotating body 3 and the boom bracket 41b. The horizontal rotation of the boom bracket 41b operates in response to the expansion and contraction of the swing cylinder 45.

[0021] The arm 42 is attached to the boom 41 so as to be able to rotate up and down (rotate back and forth). The base end of the arm 42 is supported so as to be able to rotate up and down around a pivot pin 42a. An arm cylinder 42c that is movable so as to be able to expand and contract is provided between the middle part of the boom 41 and the base end of the arm 42. The arm 42 rotates up and down relative to the boom 41 in response to the expansion and contraction of the arm cylinder 42c.

[0022] The bucket 43 is attached to the arm 42 so as to be able to rotate up and down. The base end of the bucket 43 is supported so as to be able to rotate up and down (rotate back and forth) around a pivot pin 43a. A bucket link 44 that transmits driving force to the bucket 43 is interposed between the tip end of the arm 42 and the bucket 43. A bucket cylinder 43c that is movable so as to be able to expand and contract is provided between the bucket link 44 and the base end of the arm 42. The bucket 43 rotates up and down relative to the arm 42 in response to the expansion and contraction of the bucket cylinder 43c.

[0023] The control section 5 is provided above the upper rotating body 3 and is surrounded by a cabin 50. The control section 5 is equipped with a driver's seat 51 where an operator sits, an operation device 52 operated by the operator, a display device (not shown) that displays various information, and the like. The operator can perform travel, rotation, operation of the work machine 4, and the like by operating the operation device 52 while seated in the driver's seat 51. The driver's seat 51 is supported by a seat mount 53. The driver's seat 51, the operation device 52, the display device, and the seat mount 53 are all disposed inside the cabin 50.

[0024] The rotating work vehicle 1 of this embodiment is equipped with two GNSS antennas 6A, 6B (hereinafter, these will be collectively referred to as "antenna 6"). Antenna 6A is arranged on the same horizontal plane as antenna 6B. Antenna 6 is, for example, a GPS (Global Positioning System) antenna, but is not limited to this. For example, the position of the end of a bucket 43 can be detected based on the position coordinates detected by antenna 6 and the detection results of various sensors mounted on the rotating work vehicle 1. This enables high-precision control, which can be useful for automating work and ensuring safety in the surrounding area.

[0025] 1, in this revolving work vehicle 1, like a typical small rear swing hydraulic excavator, the engine 30 is disposed at the rear of the upper revolving body 3, and the seat mount 53 supporting the driver's seat 51 is disposed above the engine 30, making it difficult to secure installation space for the antenna 6 on the bonnet that covers the engine 30. On the other hand, there is no obstruction around the roof 50r above the driver's seat 51 (i.e., the roof of the cabin 50), which is convenient for ensuring the reception level of the antenna 6. For this reason, in this embodiment, the antenna 6 is installed on the roof 50r.

[0026] A roof guard 7 as shown in FIG. 3 is attached to the roof 50r of the cabin 50. The roof guard 7 is a structure for protecting the roof 50r of the cabin 50, and prevents damage to the cabin 50 due to objects falling from above. The roof guard 7 is fixed to the roof 50r with a number of bolts 73. As will be described later, the roof guard 7 functions as a support for supporting the antenna 6. The roof 50r has a water gradient that is low at the front and high at the rear (see FIG. 1), but the roof guard 7 itself is disposed along the horizontal direction. This is convenient for arranging the base 82 described later horizontally, and therefore for mounting the antenna 6 vertically.

[0027] The slewing work vehicle 1 is equipped with a roof guard 7 as a support fixed to the roof 50r above the driver's seat 51, and a mounting member 8 for installing an antenna 6 (an example of an object installed on a roof) on the roof 50r. The antenna 6 is installed on the roof 50r via the roof guard 7 and the mounting member 8. As shown in FIG. 4, the mounting member 8 has a stay 81 to which the antenna 6 is attached, and a base 82 attached to the roof guard 7. The base 82 is attached to the roof guard 7 via a hinge 83, and is configured to be freely rotatable around an axis along the horizontal direction.

[0028] The lower part of the antenna 6 is formed in a cylindrical shape, and the antenna 6 is attached to the stay 81 by placing this over the stay 81 and fastening the clamp member 61 (see FIG. 1). The lower part of the antenna 6 is split in at least one place in the circumferential direction, and is configured so that its diameter can be reduced in response to fastening of the clamp member 61. Since the antenna 6 is expensive, it is assumed that it will be removed when not in use, such as during transportation, and it can be attached and detached relatively easily by operating the clamp member 61. In contrast, the mounting member 8 is assumed to be permanently attached, and its attachment and detachment require relatively complicated work.

[0029] Therefore, in this slewing work vehicle 1, the posture of the mounting member 8 can be changed by rotation of the base 82 about an axis along the horizontal direction between an upward posture in which the tip of the stay 81 faces upward as shown in FIG. 4 and a downward posture in which the tip of the stay 81 faces downward as shown in FIG. 5. The upward posture is used when installing the antenna 6 on the roof 50r, and the downward posture is used during transportation, etc. The roof guard 7 has a first fixing portion 71 for fixing the mounting member 8 in the upward posture and a second fixing portion 72 for fixing the mounting member 8 in the downward posture. The first fixing portion 71 and the second fixing portion 72 are provided adjacent to each other.

[0030] As shown in Fig. 4, by placing the mounting member 8 in an upward position, the antenna 6 attached to the stay 81 is placed on the roof 50r. Also, by placing the mounting member 8 in a downward position as shown in Fig. 5, the stay 81 (and the antenna 6) do not protrude significantly upward. Therefore, when the slewing work vehicle 1 is loaded onto the bed of a truck or the like and transported on a road, if the antenna 6 and stay 81 exceed the height limit, this can be dealt with by the simple task of rotating the base 82, and the height can be kept within the prescribed height limit set by traffic regulations.

[0031] For example, if the vehicle height of the swivel work vehicle 1 required as the height to the top end of the roof guard 7 is 2700 mm, and the bed height of the truck (low-floor vehicle) is 1000 mm, the height during transportation calculated without considering deflection will be 3700 mm (see FIG. 6). Therefore, if the height limit set by traffic regulations is 3800 mm, and the stay 81 protrudes from the top end of the roof guard 7 by more than 100 mm, the height limit cannot be met even if the antenna 6 is removed, and the work of removing the mounting member 8 is complicated. However, if the mounting member 8 is positioned downward by rotating the base 82, it can be placed within the specified height limit, and this can be dealt with by simple work.

[0032] The stay 81 is erected on a base 82 formed in a plate shape. The stay 81 is fixed to the base 82 by welding or the like. In this embodiment, the stay 81 is formed of a hollow support, but is not limited to this and may be a solid support. The mounting member 8 has a first support member 84 that supports the base 82 in the upward position, and a second support member 85 that supports the base 82 in the downward position. The first support member 84 is disposed on the first fixing portion 71 of the roof guard 7, and the second support member 85 is disposed on the second fixing portion 72 of the roof guard 7. The first and second support members 84, 85 are each formed in a plate shape.

[0033] The base 82 has a bolt hole 82h through which a bolt 86 is inserted. The base 82 lying horizontally on the first fixing portion 71 is supported from below by a first support member 84. The first support member 84 has a bolt hole 84h formed in a position opposite the bolt hole 82h. The mounting member 8 is fixed in an upward position as shown in FIG. 4 by tightening a nut (not shown) on the bolt 86 inserted through the bolt holes 82h, 84h. The antenna 6 attached to this stay 81 is not displaced due to vibration or the like, and can accurately detect position coordinates.

[0034] The base 82 lying horizontally on the second fixing portion 72 is supported from below by the second support member 85. The second support member 85 is disposed on the same horizontal plane as the first support member 84, and the base 82 can rotate within a range of 180 degrees. The second support member 85 has a bolt hole 85h formed at a position opposite the bolt hole 82h. The mounting member 8 is fixed in a downward position as shown in FIG. 5 by tightening a nut (not shown) on the bolt 86 inserted into these bolt holes 82h, 85h. Therefore, the position of the mounting member 8 is stable even during transportation. In the downward position, the stay 81 is disposed in the space between the upper end of the roof guard 7 and the roof 50r, and does not protrude from the upper end of the roof guard 7.

[0035] In this embodiment, as shown in Fig. 3, the roof guard 7, which is the support body, is constituted by a frame body 70, and the second fixing portion 72 is constituted so that the stay 81 can be arranged within the space partitioned by the frame body 70. The frame body 70 is formed in a lattice shape by combining frame members 70a extending in the front-rear direction and frame members 70b extending in the left-right direction. The roof guard 7 covers a skylight 50w provided at the front of the roof 50r (see Fig. 2), but since this is constituted by the frame body 70, natural lighting is ensured. The support body is not limited to being constituted by such a frame body 70, and may be constituted by, for example, a box body.

[0036] The installation location of the antenna 6B is configured in the same manner as the installation location of the antenna 6A shown in FIG. 4. However, in the installation location of the antenna 6A, both the first fixing part 71 and the second fixing part 72 are set on the roof 50r, whereas in the installation location of the antenna 6B, as shown in FIGS. 2 and 3, the first fixing part 71 is set on the roof 50r (more specifically, on the outer edge of the roof 50r) and the second fixing part 72 is set on the outside of the roof 50r in a plan view. The roof guard 7 has a part that protrudes outward from the side edge of the roof 50r, and this part is configured as the second fixing part 72. As a result, even if it is difficult to secure a space for arranging the stay 81 between the upper end of the roof guard 7 and the roof 50r, the mounting member 8 can be changed to a downward position without any particular problems.

[0037] Furthermore, in the case where the second fixing portion 72 is set outward in a plan view of the roof 50r in this manner, it is possible to rotate the base 82 with the antenna 6B attached to the stay 81, and change the mounting member 8 from an upward to a downward orientation. This embodiment is not intended for such use, but when rotating the base 82 without removing the antenna 6B, it is only necessary to appropriately modify the shape and size of the constituent material (frame materials 70a, 70b) of the roof guard 7 that forms the second fixing portion 72 so that the antenna 6B does not interfere with the roof guard 7.

[0038] In this embodiment, the GNSS antenna 6 is installed on the roof 50r as an example of a rooftop installation, but the present invention is not limited to this. Examples of rooftop installations other than antennas include a prism used in a total station, a laser receiver, and a rotating light.

[0039] In the present embodiment, an example has been shown in which the roof guard 7 functions as a support for supporting the antenna 6, but the present invention is not limited to this. In addition, the support is not limited to being provided over the entire roof 50r like the above-mentioned roof guard 7, but may be provided locally on the roof 50r, for example, only at a corner of the roof 50r where the antenna 6 is to be installed.

[0040] In this embodiment, an example is shown in which a cabin 50 is provided to surround the control unit 5, but instead of this, a configuration in which a canopy is provided to cover the control unit 5 from above may be used. In such a case, the above-mentioned configuration is applied in order to install a roof-mounted object on the roof of the canopy above the driver's seat.

[0041] The present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0042] 1 Swing work vehicle 2 Undercarriage 3. Upper rotating body 4 Work equipment 5. Control Unit 6 Antenna (example of rooftop installation) 7 Roof guard (an example of a support) 8 Mounting material 30 Engine 50 Cabin 50r roof 51 Driver's seat 53 Seat mount 70 Frame 81 Stay 82 Base

Claims

1. A first mounting member and a second mounting member are provided above a roof of a control section that is provided on one side of the left and right direction of the aircraft in a plan view, and a roof-mounted object can be detachably mounted on the first mounting member and the second mounting member, A working machine, wherein the first mounting member is disposed in front of the second mounting member, and the second mounting member is disposed on the other of the first mounting member in a left-right direction.

2. A work machine, wherein the first mounting member and the second mounting member are disposed inside an outer periphery of the roof in a plan view.

3. The work machine according to claim 2 , wherein the roof-mounted object attached to the second mounting member overlaps with the outer periphery in a plan view.

4. 4. A work machine according to claim 1, wherein the roof-mounted object attached to the second mounting member is disposed so as to be shifted to the one side with respect to the roof.

5. 4. A work machine according to claim 1, wherein the first mounting member is disposed so as to be shifted to the other of the left and right directions with respect to the center of the roof.

6. 4. A work machine according to claim 1, wherein the second mounting member is disposed so as to be offset to one side with respect to a center of the roof.

7. The work machine according to claim 1 , wherein the roof-mounted object is an antenna for position measurement.

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