Work equipment

Abstract

To reduce the number of components necessary for fastening components to be fitted with screws while preventing edge collision of peripheral components.SOLUTION: A work machine comprises: a machine body; a plate (21) that is a first component installed in the machine body; a round rod (26) that is a rod-shaped protective component formed round on the outer peripheral surface and installed in an edge (24a) of the plate (21); and a sheet metal component (28) that is a component fitted to the plate (21) with a screw. The sheet metal component (28) has a side end surface 28a that is brought into contact with the round rod (26), and is fitted to be used for preventing rotation of the round rod (26) in a state where it is screw-fastened by using a bolt (30).SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a work machine such as a backhoe. [Background technology]

[0002] Conventionally, work machines (construction machines) are known, as disclosed in Patent Documents 1 and 2. In the work machine disclosed in Patent Document 1, a round bar-shaped protective member is provided on the edge of the oil tank, and the protective member is used to prevent contact between the edge of the oil tank and the hydraulic hose. In the work machine disclosed in Patent Document 2, the oil tank is provided with a viewing window and a cylindrical portion having an outer surface that protrudes from the wall of the oil tank and guides the hydraulic hose, and the cylindrical portion guides the hydraulic hose to prevent contact between the oil tank and the hydraulic hose. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-31513 [Patent Document 2] Japanese Patent Publication No. 2022-85494 Summary of the Invention [Problem to be solved by the invention]

[0004] While the above-mentioned conventional techniques are all designed to protect hydraulic hoses and are specialized in protecting hydraulic hoses, in a work machine there are multiple peripheral parts other than hydraulic hoses, such as harnesses and fuel tubes, that must be prevented from coming into contact with the edges of other parts or components.

[0005] Conventionally, cover members made of rubber or other materials, known as trim, have been attached to the edges of sheet metal or other parts as a safety measure or to prevent the edges from hitting the parts. However, attaching the cover members is time-consuming and requires securing an attachment margin, which is the space required to attach the cover members to the edges.

[0006] Furthermore, another part (hereinafter referred to as an attachment part) may be fastened to such a part with an edge using a bolt or the like. In such cases, a separate anti-rotation part or the like is provided on the part with the edge to prevent the attachment part from rotating together with the bolt. This poses a problem in that the number of parts, such as anti-rotation parts, required for screw fastening of the attachment part increases.

[0007] One aspect of the present invention has been developed in consideration of these problems, and provides a work machine that can reduce the number of parts required for screwing together attached parts while preventing contact with the edges of surrounding parts. [Means for solving the problem]

[0008] In order to solve the above problem, a work machine according to one embodiment of the present invention comprises a first part, a rod-shaped protective part with a rounded outer circumferential surface that is installed on the edge of the first part, and an attachment part that is screwed to the first part or a second part different from the first part, and is characterized in that the attachment part abuts against the protective part and cannot rotate around the screw axis.

[0009] According to the above-mentioned configuration, the rod-shaped protective component placed on the edge portion can prevent peripheral components such as harnesses, hoses, and tubes from contacting the edge. This eliminates the need for the time-consuming task of attaching cover components such as trim. Another advantage is that the attachment allowance can be reduced compared to a configuration that requires attaching cover components.

[0010] Moreover, in the above configuration, the mounting part abuts against the protective part and is configured to be unable to rotate around the screw shaft. In other words, the protective part also functions as a rotation stopper that prevents the mounting part from rotating around the screw shaft. This eliminates the need for a separate rotation stopper, and reduces the number of parts required for screw fastening of the mounting part. Furthermore, because the mounting part is prevented from rotating simply by abutting against the protective part, the shape can be simplified compared to a configuration in which a separate rotation stopper is required.

[0011] In the work machine according to one aspect of the present invention, the protective component may be a metal round bar, which makes it possible to reliably obtain a protective component with excellent durability.

[0012] In the work machine according to one aspect of the present invention, the protective component may be welded to the edge portion, which allows the protective component to be attached simply and firmly.

[0013] In the work machine according to one aspect of the present invention, the round bar may have a diameter of 4 to 8 mm. This ensures both the function as a protective part that prevents contact with the edges of surrounding parts and the function as a rotation stopper for attached parts, while avoiding unnecessary space. [Effects of the Invention]

[0014] According to one aspect of the present invention, it is possible to reduce the number of parts required for screw fastening of attachment parts while preventing contact with the edges of surrounding parts. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic perspective view showing the overall configuration of a work machine according to an embodiment of the present invention; [Figure 2] FIG. 2 is a schematic perspective view showing the interior of a cabin of the work machine. [Figure 3] FIG. 2 is a cross-sectional perspective view of the work machine taken along a horizontal plane near the top surface of the step. [Figure 4]FIG. 4 is an enlarged view of an area B shown in FIG. [Figure 5] FIG. 10 is an enlarged perspective view of the essential part of the edge portion where the round bar is arranged, viewed from a different angle. DETAILED DESCRIPTION OF THE INVENTION

[0016] (Outline of the work equipment) An embodiment of the present invention will be described below with reference to the drawings as appropriate. Fig. 1 is a schematic perspective view showing the overall configuration of a work machine 1 according to this embodiment. In this embodiment, a backhoe is exemplified as the work machine 1.

[0017] As shown in Fig. 1, the work machine 1 includes a traveling device 2, a machine body 3, and a working device 4. The machine body 3 is supported on the frame of the traveling device 2 via a bearing body so as to be rotatable about a vertical axis (an axis extending in the up-down direction). The machine body 3 is equipped with a cabin 5, a prime mover 6, a bonnet 7, a counterweight 8, the working device 4, and the like.

[0018] Inside the cabin 5 (hereinafter referred to as the interior), there is provided a driver's seat 20 (see FIG. 2) where an operator (driver) sits. In the following description, the front side of the worker seated in the driver's seat 20 will be referred to as the front, the rear side of the worker will be referred to as the rear, the left side of the worker will be referred to as the left side, and the right side of the worker will be referred to as the right side. The cabin 5 is installed on the left side of the machine body 3.

[0019] The working device 4 is a device that operates using hydraulic oil pressure as a working fluid pressure, and is installed at the front of the machine body 3. The working device 4 includes a first boom 15, a second boom 16, an arm 17, a bucket 18, and the like, which are rotated by hydraulic cylinders 11, 12R, 12L, 13, and 14.

[0020] (Inside the cabin) Fig. 2 is a schematic perspective view showing the interior of the cabin 5 of the work machine 1. As shown in Fig. 2, the aforementioned driver's seat 20 is installed inside the cabin. The driver's seat 20 is installed on a step (first component) 21 that forms the floor of the cabin. Around the driver's seat 20, a plurality of operating levers 22 are arranged for operating the traveling device 2, the work device 4, and the machine body 3. In addition, an air conditioning unit 23 is arranged below the driver's seat 20.

[0021] Fig. 3 is a cross-sectional perspective view of the work machine 1 taken along a horizontal plane near the top surface of the step 21. Fig. 4 is an enlarged view of area B shown in Fig. 3. As shown in Fig. 4, the air conditioning unit 23 is disposed inside an opening 24 formed in the step 21. A holding member 25 for holding the air conditioning unit 23 is disposed below the opening 24, and the air conditioning unit 23 is held on the mounting surface of the holding member 25.

[0022] (Avoiding contact with harness edges) 4, in a configuration in which the holding member 25 is positioned below the step 21 and the air conditioning unit 23 is attached so as to protrude from the opening 24, the harness (not shown) of the air conditioning unit 23 is also pulled out to the upper surface side of the step 21 through the opening 24. Therefore, it is necessary to take measures to prevent the harness from coming into contact with the edge portion 24a of the opening 24.

[0023] 4, in the work machine 1, a metal round bar 26 is disposed on the edge portion 24a of the opening 24 in the step 21. The round bar 26 is a rod-shaped protective part with a rounded outer periphery, and is disposed so as to fit along the edge portion 24a.

[0024] In this embodiment, since both the round bar 26 and the step 21 are made of metal, the round bar 26 is attached to the edge portion 24a by welding. This allows the round bar 26, which is a protective component, to be attached simply and firmly. However, the method of attaching the round bar 26 to the edge portion 24a is not limited to welding.

[0025] In this embodiment, by using a metal round bar 26 as the protective component, a protective component with excellent durability can be reliably obtained. However, the cross section of the protective component is not limited to a circular shape, and it may be a rod-shaped member with an elliptical cross section, or a rod-shaped member with a D-cut arc cross section.

[0026] The round bar 26 is placed at a location on the edge portion 24a that may come into contact with at least the harness (not shown) of the air conditioning unit 23. The round bar 26 may also be placed at a location that may come into contact with not only the harness but also peripheral parts that should be prevented from coming into contact with the edge portion 24a, such as hydraulic hoses and fuel tubes.

[0027] Furthermore, the position of the round bar 26 relative to the tip (corner) of the edge portion 24a may be such that the outer peripheral surface protrudes further toward the opening 24 than the tip of the edge portion 24a, or conversely, the outer peripheral surface may be located more inward than the tip of the edge portion 24a. The key point is that it is sufficient that the peripheral members do not come into contact with the edge portion 24a by coming into contact with the round bar 26.

[0028] Figure 5 is an enlarged perspective view of the essential parts of the edge portion 24a where the round bar 26 is disposed, seen from a different angle. As shown in Figure 5, the peripheral part 27 comes into contact with the round bar 26 and is supported by the rounded outer circumferential surface of the round bar 26, as the round bar 26 is attached to the edge portion 24a. This alleviates stress concentration at the contact point of the peripheral part 27, preventing damage to the peripheral part 27.

[0029] This configuration eliminates the need for the time-consuming task of attaching a cover member, such as trim, to the edge portion 24a, simplifying the work process. Furthermore, a configuration for attaching a cover member requires an attachment margin, which is a space for attaching the cover member from the tip of the edge portion 24a toward the inside. In contrast, in the case of the round bar 26, it is only necessary to secure a space equal to the diameter of the round bar 26 from the tip of the edge portion 24a toward the inside. Therefore, even in narrow edge portions where it is difficult to secure an attachment margin for the cover member, contact between the peripheral component 27 and the edge portion can be avoided. Furthermore, since the cover member is attached by inserting it into the edge portion 24a, there is a problem that it becomes easily detached due to deterioration of the material over time, but this problem can be eliminated.

[0030] (Prevents dragging) Moreover, in the work machine 1, the round bar 26 arranged on the edge portion 24a is also used as a rotation stopper for the attachment parts attached to the step 21. As shown in Figures 4 and 5, a pair of sheet metal parts 28, which are attachment parts, are arranged near the opening 24 in the step 21 and are fixed (screw-fastened) to the step 21 with bolts 30. When the sheet metal parts 28 are screwed in this way, the sheet metal parts 28 rotate as the bolts 30 rotate.

[0031] For this reason, conventionally, a rotation prevention part is placed on a plate so that the sheet metal part 28 abuts against it, and then the sheet metal part 28 is screwed together while abutting against the rotation prevention part. In this case, as mentioned above, there is a problem in that the number of parts required to screw together the sheet metal part 28, such as the rotation prevention part, increases. In addition, there is also a problem in that the shape of the sheet metal part 28 becomes complicated because it depends on the position where the rotation prevention part is attached and the shape of the rotation prevention part.

[0032] In contrast, in the work machine 1, as shown in Fig. 4, the sheet metal part 28, which is an attachment part, abuts against the round bar 26, which is a protective part, and is prevented from rotating around the screw axis. In other words, the sheet metal part 28 abuts against the round bar 26 arranged on the edge portion 24a, and the round bar 26 is used as a rotation stopper when the sheet metal part 28 is fixed to the plate 21 with the bolt 30. This eliminates the need to separately provide a rotation stopper part, and the number of parts required for screwing the sheet metal part 28 can be reduced. Moreover, the shape of the sheet metal part 28 only needs to be a shape that abuts against the round bar 26, so it is possible to simplify the design compared to when a rotation stopper part is used.

[0033] Specifically, the sheet metal part 28, which is an attachment part, has a side end surface 28a that abuts against the round bar 26 when it is placed in a predetermined attachment position on the plate 21. By shaping the sheet metal part 28 so that it has the side end surface 28a that abuts against the round bar 26 when it is placed in a predetermined attachment position on the plate 21, the round bar 26 can be used as a rotation stopper.

[0034] Here, plate 21 is exemplified as the first part, and sheet metal part 28 is exemplified as the mounting part. However, the first part to which the protective part is attached and the mounting part that is fastened with a screw using the protective part as a rotation stop are not limited to these.

[0035] Also, for example, a configuration may be adopted in which a protective component is attached to the machine frame as a first component, and an electrical component mounting bracket as a mounting component is screwed to the machine frame. Examples of electrical components mounted by the electrical component bracket include alarm devices (horns, running buzzers, turning alarms, etc.), cameras, lights, display devices, and various sensors. The protective component protects the edges of harnesses and the like extending from these electrical components, and also functions as a rotation stopper for the electrical component mounting bracket that is screwed to the machine frame. Alternatively, a configuration may be adopted in which a protective component is attached to a first bracket (first component) for mounting electrical components and the like to the machine frame, and a second bracket (mounting component) for mounting other electrical components and the like is screwed to this first bracket.

[0036] Also, in the above description, an example has been given of a configuration in which sheet metal part 28 as an attachment part is screwed to plate 21 as a first part to which round bar 26 as a protective part is attached. However, the object to which the attachment part is screwed is not limited to the first part to which the protective part is attached, and when the attachment part is screwed to a second part separate from the first part, the protective part attached to the first part may be used as a rotation stopper.

[0037] The diameter of the round bar 26 is not particularly limited, but may be in the range of 4 to 8 mm. By making it this thick, it is possible to avoid taking up unnecessary space while ensuring both the function as a protective part that prevents contact with the edges of the peripheral parts 27 and the function as a rotation stopper for the attached parts.

[0038] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0039] 1 Work equipment 2 Running gear 3 aircraft 4 Work equipment 5 Cabins 20 Driver's seat 21 Plate (first part) 22 Operating lever 23 Air conditioning unit 24 Aperture 24a Edge 25 Retaining member 26 Round bar (protective part) 27 Peripheral parts 28 Sheet metal parts (mounting parts) 28a Side end surface 30 bolts (screws)

Claims

1. A first part; a rod-shaped protective part that is installed on an edge portion of the first part and extends in one direction and has a rounded outer circumferential surface; an attachment part that is screwed to the first part or a second part that is different from the first part, the protective component is disposed in contact with the edge portion along an extension direction of the edge portion, The mounting part has a shape that, when screwed to the first part or the second part, abuts against a portion of the protective part that is positioned along the edge portion and abuts against the edge portion, and the working machine is unable to rotate around the screw axis by abutting against the protective part.

2. The work machine according to claim 1 , wherein the protective part is a metal round bar.

3. 3. The work machine according to claim 1, wherein the protective part is welded to the edge portion.

4. 3. The work machine according to claim 2, wherein the diameter of the round bar is 4 to 8 mm.

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