Work machine

Abstract

The invention provides a technology capable of appropriately arranging hydraulic cylinders in a work machine having a yaw function using the hydraulic cylinders. An exemplary work machine is provided with a rotating body in which a work device is disposed in the front thereof, and is provided with: a rotating frame that constitutes the bottom of the rotating body; a first vertical plate and a second vertical plate which extend from the front to the rear on the rotating frame and are arranged at an interval in the left-right direction; a swinging body which is supported by the rotating frame in front of the first vertical plate and the second vertical plate in a horizontally rotatable manner, and which supports the work device; a hydraulic cylinder which is disposed on the outer side of the machine body on the side opposite to the second vertical plate with respect to the first vertical plate on the rotating frame, and one end of which is connected to the swinging body; and an auxiliary vertical plate disposed between the first vertical plate and the hydraulic cylinder on the slewing frame and connected to the other end of the hydraulic cylinder.

Description

Technical Field

[0001] The present invention relates to a working machine. Background Art

[0002] Conventionally, there is known a so-called swing work vehicle equipped with a sway function in which a support portion that supports a work machine so as to be rotatable up and down can be horizontally rotated (for example, refer to Patent Document 1).

[0003] The revolving work vehicle disclosed in Patent Document 1 comprises: a lower traveling body; and an upper revolving body disposed above the lower traveling body in a revolving manner. A swinging body supported in a horizontally rotatable manner is disposed at the front portion of a revolving frame constituting the bottom of the upper revolving body. The swinging body supports the working machine so as to be able to rotate up and down. A first longitudinal plate and a second longitudinal plate are disposed upright in a manner that are positioned at intervals on the left and right and extend in the front-rear direction on the bottom plate of the revolving frame. A hydraulic lateral swing cylinder is disposed on the side opposite to the first longitudinal plate across the second longitudinal plate to connect the revolving frame and the swinging body.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2019-218784

[0005] In addition, sometimes an electric motor drives a hydraulic pump that pressurizes oil to a hydraulic actuator such as a sway cylinder. In such a structure, a battery unit that supplies power to the electric motor is mounted on the revolving frame. If the storage capacity of the battery unit is to be increased, the battery unit will occupy a large area on the revolving frame.

[0006] The battery unit is heavy, so it is considered advantageous to arrange the battery unit in the center of the revolving frame whose strength is improved by arranging the first longitudinal plate and the second longitudinal plate. In such a structure, components such as the electric motor and the hydraulic pump are arranged on the side of the battery unit, and interference between at least a part of these components and the sway cylinder may become a problem. Summary of the invention

[0007] In view of the above circumstances, an object of the present invention is to provide a technology capable of appropriately laying out hydraulic cylinders in a working machine having a yaw function using hydraulic cylinders.

[0008] An exemplary working machine of the present invention is a working machine having a rotating body with a working device arranged at the front, wherein the machine comprises: a rotating frame constituting the bottom of the rotating body; a first longitudinal plate and a second longitudinal plate extending from the front to the rear on the rotating frame and arranged at intervals on the left and right; a swinging body supported on the rotating frame in a horizontally rotatable manner in front of the first longitudinal plate and the second longitudinal plate, the swinging body supporting the working device; a hydraulic cylinder arranged on the rotating frame at the outer side of the machine body on the side opposite to the second longitudinal plate side relative to the first longitudinal plate, one end of which is connected to the swinging body; and an auxiliary longitudinal plate arranged on the rotating frame between the first longitudinal plate and the hydraulic cylinder and connected to the other end of the hydraulic cylinder.

[0009] According to the exemplary present invention, it is possible to appropriately lay out the hydraulic cylinders in a working machine having a yaw function using the hydraulic cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a perspective view showing a schematic structure of a working machine.

[0011] Figure 2 It is a perspective view showing the schematic structure of the interior of the rotating body.

[0012] Figure 3 Observe from above Figure 2 A schematic top view of the structure shown.

[0013] Figure 4 It is a side view schematically showing the relationship between the auxiliary vertical plate, the yaw cylinder, and the first vertical plate.

[0014] Figure 5 This is a perspective view schematically showing the relationship between the yaw cylinder and the hydraulic oil tank on the revolving frame.

[0015] Figure 6 This is a perspective view schematically showing the relationship between the yaw cylinder and the hydraulic oil tank on the revolving frame.

[0016] Description of Reference Numerals

[0017] 1…rotating body; 3…working device; 4…battery unit; 5…electric motor; 6…hydraulic pump; 9…working oil tank; 14…rotating frame; 34…boom bracket (swinging body); 38…swing cylinder (hydraulic cylinder); 91…cutout; 100…working machine; 142…first longitudinal plate; 148…auxiliary longitudinal plate; 148a…connecting portion; 1481…connecting structure. DETAILED DESCRIPTION

[0018] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same reference numerals are given to the same or corresponding parts in the drawings, and the description thereof will not be repeated unless it is particularly necessary.

[0019] <1. Schematic structure of working machine>

[0020] Figure 1 1 is a perspective view showing a schematic structure of a working machine 100 according to an embodiment of the present invention. Specifically, the working machine 100 is a hydraulic excavator. The working machine 100 may be, for example, a small hydraulic excavator. In addition, the working machine of the present invention is not limited to a hydraulic excavator. The present invention can be widely applied to working machines (swinging working machines) having a swinging body.

[0021] like Figure 1 As shown, the working machine 100 includes a revolving structure 1 , a traveling structure 2 , and a working device 3 .

[0022] In addition, in this specification, the front-to-back direction is defined by taking the side where the working device 3 is located as "front" relative to the rotating body 1. In addition, the gravity direction perpendicular to the front-to-back direction is taken as the up-down direction, the upstream side of the gravity direction is taken as "up", and the downstream side is taken as "down". The direction perpendicular to the front-to-back direction and the up-down direction is taken as the left-to-right direction, the side that becomes the left when moving from the back to the front is taken as "left", and the side that becomes the right is taken as "right". In addition, the plane parallel to the front-to-back direction and the left-to-right direction is taken as a horizontal plane, and the plane orthogonal to the horizontal plane is taken as a vertical plane. In addition, since the rotating body 1 rotates, its direction is not fixed, but the rotating body 1 is taken as Figure 1 The directions are expressed on the premise that the orientation shown does not change. In addition, the directions defined here are only names used for explanation and are not intended to limit the actual positional relationship and direction.

[0023] The revolving body 1 is configured to be able to rotate around an axis extending in the vertical direction at its central portion. In addition, in the present embodiment, the revolving body 1 is supported by a traveling body 2 arranged below it in a manner that allows it to rotate. The revolving body 1 is driven by a revolving motor (not shown) composed of a hydraulic motor to rotate. The revolving body 1 is configured to be able to rotate right and left. The working device 3 is arranged in front of the revolving body 1. That is, the working machine 100 includes a revolving body 1 with a working device 3 arranged in front.

[0024] The revolving body 1 is provided with a driving seat 11 for an operator who operates the working machine 100 to sit on. The operator who sits on the driving seat 11 faces forward and operates various operating devices provided around the driving seat 11. In the present embodiment, the operating device includes an operating lever 12. The driving seat 11 is supported by a cover (not shown) that covers various components arranged inside the revolving body 1 (engine room). The various components arranged inside the revolving body 1 will be described later. In addition, a counterweight 13 is arranged at the rear end of the revolving body 1.

[0025] The traveling body 2 enables the working machine 100 to move by itself. Specifically, the traveling body 2 has a pair of crawlers 22 arranged on the left and right sides of the traveling body frame 21. Each crawler 22 is driven by a traveling motor 23 composed of a hydraulic motor. If the left and right crawlers 22 are driven in the same direction at the same time, the traveling body 2 moves straight forward or backward. Whether it is forward or backward is determined by the rotation direction of the traveling motor 23. The traveling body 2 is driven independently by the left and right crawlers 22 to make a left turn or a right turn.

[0026] In addition, the traveling body 2 of the present embodiment is a crawler type, but the traveling body is not limited to the crawler type, and may also be a wheel type, etc. In addition, a bulldozer for performing land leveling work may be provided at the front or rear of the traveling body 2.

[0027] The working device 3 has a boom 31, an arm 32, and a bucket 33. The working device 3 performs excavation work of sand and soil by operating these simultaneously or independently. In addition, the bucket 33 can be replaced with other working tools such as a crusher used in the demolition work.

[0028] One end of the boom 31 is supported by a boom bracket 34, and the boom 31 can rotate in a vertical plane (can rotate up and down). The boom bracket 34 is supported by the revolving body 1. The boom 31 is bent in the middle part and has a V-shape when viewed from the side. The boom 31 rotates by extending and retracting a boom cylinder 35, one end of which is connected to the boom bracket 34 and the other end of which is connected to the middle part of the boom 31.

[0029] One end of the boom 32 is supported on the other end of the boom 31 so as to be rotatable in a vertical plane. The boom 32 is rotated by extending and retracting an arm cylinder 36, one end of which is connected to the middle portion of the boom 31 and the other end of which is connected to one end of the boom 32. One end of the bucket 33 is supported on the other end of the boom 32 so as to be rotatable in a vertical plane. The bucket 33 is rotated by extending and retracting a bucket cylinder 37, one end of which is connected to one end of the boom 32 and the other end of which is connected to the bucket 33. Figure 1 In the embodiment, the boom 31, the arm 32, and the bucket 33 are respectively provided so as to be rotatable around an axis (not shown) extending in the left-right direction.

[0030] Specifically, the boom bracket 34 is supported on the revolving body 1 so as to be rotatable in a horizontal plane (horizontally rotatable). In other words, the boom bracket 34 can rotate about an axis (not shown) extending in the vertical direction. The boom bracket 34 rotates in a left or right direction by extending and retracting a sway cylinder 38 connected to the boom bracket at one end and connected to the revolving body 1 at the other end. That is, by operating the sway cylinder 38, the working device 3 can be swung in a left or right direction.

[0031] The boom cylinder 35, the arm cylinder 36, the bucket cylinder 37, and the sway cylinder 38 are all hydraulic cylinders, and are included in the hydraulic actuator of the working machine 100. In addition, the hydraulic actuator of the working machine 100 also includes the above-mentioned travel motor 23 and a swing motor (not shown). The operator sitting in the driving seat 11 can control the hydraulic actuator by operating the above-mentioned operating lever 12, and perform work using the working device 3.

[0032] <2. Structure of the rotating body>

[0033] [2-1. Overview of the interior of the rotating body]

[0034] Figure 2 1 is a perspective view showing the schematic structure of the interior of the rotating body 1. Figure 2 As shown, the revolving structure 1 includes a revolving frame 14 at the bottom thereof. In other words, the working machine 100 includes a revolving frame 14 constituting the bottom of the revolving structure 1. The revolving frame 14 is composed of a flat plate-shaped member. Various components are mounted on the revolving frame 14.

[0035] like Figure 2 As shown, the battery unit 4, the electric motor 5, the hydraulic pump 6 and the control valve 7 are arranged on the revolving frame 14. That is, the working machine 100 includes the battery unit 4, the electric motor 5, the hydraulic pump 6 and the control valve 7. The working machine 100 includes the battery unit 4, the electric motor 5, the hydraulic pump 6 and the control valve 7 arranged on the revolving frame 14.

[0036] In addition, the yaw cylinder 38 is arranged at the other end portion of the revolving frame 14 connected to the yaw cylinder 38 , which will be described later.

[0037] (2-1-1. Rotating frame)

[0038] Figure 3 Observe from above Figure 2 A schematic top view of the structure shown in FIG. Figure 2 and Figure 3As shown, the revolving frame 14 includes a first vertical plate 142 and a second vertical plate 143. That is, the working machine 100 includes the first vertical plate 142 and the second vertical plate 143. By providing the first vertical plate 142 and the second vertical plate 143, the strength of the revolving frame 14 can be improved.

[0039] The first longitudinal plate 142 and the second longitudinal plate 143 are plate-shaped and are vertically arranged in the central part of the left-right direction of the upper surface of the revolving frame 14. The first longitudinal plate 142 and the second longitudinal plate 143 extend from the front to the rear on the revolving frame 14, and are arranged at intervals in the left-right direction. In detail, the first longitudinal plate 142 is arranged on the right side, and the second longitudinal plate 143 is arranged on the left side. However, this is an example, and the first longitudinal plate 142 can also be on the left side and the second longitudinal plate 143 can be on the right side. The first longitudinal plate 142 and the second longitudinal plate 143 have an inclined structure in which the height in the up-down direction of the rear side is lower than that of the front side. The first longitudinal plate 142 and the second longitudinal plate 143 are the same component integrated with the revolving frame 14.

[0040] A bracket support portion 144 is provided at the left-right center portion of the front end portion of the revolving frame 14, which supports the boom bracket 34 so as to be horizontally rotatable. The front ends of the first longitudinal plate 142 and the second longitudinal plate 143 are fixed to the bracket support portion 144. In addition, the boom bracket 34 that supports the boom 31 of the working device 3 so as to be rotatable is an example of a swing body of the present invention. That is, the working machine 100 includes a swing body 34, which is supported on the revolving frame 14 in a horizontally rotatable manner in front of the first longitudinal plate 142 and the second longitudinal plate 143, and supports the working device 3.

[0041] (2-1-2. Battery unit)

[0042] The battery unit 4 is configured to include at least one battery 41. The battery 41 is, for example, a secondary battery such as a lithium-ion battery. Figure 2 As shown, the battery unit 4 includes a plurality of batteries 41. The plurality of batteries 41 may be connected in series or in parallel. In addition, for example, the plurality of batteries 41 may be partially connected in series, and the partially connected in series may be connected in parallel to each other. In this embodiment, the number of batteries 41 is 4. The four batteries 41 are connected in series in pairs, and the two batteries 41 connected in series are connected in parallel to each other.

[0043] The working machine 100 is provided with a power supply (not shown) that converts power supplied from an AC power source (commercial power source, etc.) located outside the working machine 100 from AC power to DC power. The battery unit 4 can be charged by receiving power from the power supply. In addition, the battery unit 4 can supply power to various loads provided in the working machine 100, such as the electric motor 5.

[0044] like Figure 2 and Figure 3 As shown, a battery unit support 145 (also see Figure 6 The battery cell support 145 is a single component integrated with the revolving frame 14. In the present embodiment, the battery cell support 145 is divided into a plurality of parts, but may be composed of a single part. The battery cell 4 is supported on the battery cell support 145 via a vibration-proof component 146. The vibration-proof component 146 is composed of, for example, a rubber component.

[0045] The battery cell 4 supported by the battery cell support 145 is arranged approximately in the center in the left-right direction of the revolving frame 14, and more specifically, is arranged slightly offset to the left from the center. In addition, the battery cell 4 supported by the battery cell support 145 is arranged slightly to the rear from the center in the front-rear direction of the revolving frame 14. Figure 3 As shown, the battery unit 4 overlaps the second vertical plate 143 in a plan view. In addition, the battery unit 4 is on the upper side relative to the second vertical plate 143. As can be seen from the above, the battery unit 4 is arranged in the center of the revolving frame 14 where the first vertical plate 142 and the second vertical plate 143 are arranged to increase the strength.

[0046] (2-1-3. Electric motor)

[0047] The electric motor 5 uses the power of the battery unit 4 as a power source. That is, the electric motor 5 is driven by the power supplied from the battery unit 4. In the present embodiment, the electric motor 5 is a three-phase AC motor whose rotation speed is determined by a rotating magnetic field. In detail, power is supplied from the battery unit 4 to an inverter device (not shown). The inverter device converts the DC power supplied from the battery unit 4 into AC power and supplies the AC power to the electric motor 5.

[0048] like Figure 2 and Figure 3 As shown, a motor support 147 is provided on the upper surface of the revolving frame 14. In the present embodiment, the motor support 147 is divided into a plurality of parts, but it may also be composed of a single part. The electric motor 5 is supported on the motor support 147. The motor support 147 is supported on the revolving frame 14 via a vibration-proof component 146. The electric motor 5 supported on the motor support 147 is arranged adjacent to one side (the right side in the present embodiment) in the left-right direction of the battery unit 4. In addition, as shown in FIG. Figure 3 As shown, the electric motor 5 overlaps with the first longitudinal plate 142 when viewed from above. In addition, the electric motor 5 is on the upper side relative to the first longitudinal plate 142. As can be seen from the above, the heavy electric motor 5 is arranged at a position relatively close to the central part of the revolving frame 14 in the left-right direction where the first longitudinal plate 142 and the second longitudinal plate 143 are arranged to enhance the strength.

[0049] (2-1-4. Hydraulic pump)

[0050] The hydraulic pump 6 is driven by the electric motor 5. The hydraulic pump 6 driven by the electric motor 5 pressure-feeds hydraulic oil to the hydraulic actuators (the hydraulic cylinders 35 to 38 and the hydraulic motor 23, etc.).

[0051] In detail, the hydraulic pump 6 is arranged adjacent to the right side of the electric motor 5. The hydraulic pump 6 is connected to the connecting body 5a provided at the right end of the electric motor 5. In detail, the motor support stand 147 supports the connecting body 5a. The hydraulic pump 6 is arranged on the outside of the machine body on the side opposite to the second longitudinal plate 143 side (the right side in this embodiment) with respect to the first longitudinal plate 142. By arranging components lighter than heavy objects such as the battery unit 4 on the outside of the machine body, the balance of the working machine 100 can be improved.

[0052] (2-1-5. Control valve)

[0053] The control valve 7 is interposed between the hydraulic pump 6 and the hydraulic actuator (hydraulic cylinders 35 to 38 and the hydraulic motor 23, etc.). The control valve 7 is operated by the operating lever 12 to control the flow of the hydraulic oil supplied from the hydraulic pump 6 to the hydraulic actuator. Specifically, the control valve 7 controls the flow direction and flow rate of the hydraulic oil.

[0054] In more detail, the control valve 7 is a collection of multiple hydraulic switching valves. The control valve 7 controls the operation of each of the hydraulic cylinders 35 to 38 and the hydraulic motor 23 included in the hydraulic actuator by switching the supply and discharge of working oil. The control valve 7 is arranged on the outside of the machine body on the side opposite to the first longitudinal plate 142 (the left side in this embodiment) relative to the second longitudinal plate 143. Arranging components lighter than heavy objects such as the battery unit 4 on the outside of the machine body can improve the balance of the working machine 100.

[0055] [2-2. Layout of the sway cylinder]

[0056] Next, the layout of the yaw cylinder 38 which is one of the hydraulic cylinders included in the working machine 100 will be described.

[0057] like Figure 3 As shown, the sway cylinder 38 is arranged on the revolving frame 14 on the side opposite to the second vertical plate 143 side (right side in this embodiment) with respect to the first vertical plate 142. In addition, as described above, one end (front end) of the sway cylinder 38 is connected to the boom bracket (swing body) 34. That is, the working machine 100 includes a hydraulic cylinder 38 arranged on the revolving frame 14 on the side opposite to the second vertical plate 143 side with respect to the first vertical plate 142 and one end connected to the swing body 34. In addition, one end of the sway cylinder 38 is connected to the boom bracket 34 in a horizontally rotatable manner.

[0058] In addition, if Figure 3 As shown, the working machine 100 includes an auxiliary vertical plate 148, which is arranged between the first vertical plate 142 and the sway cylinder (hydraulic cylinder) 38 on the revolving frame 14. Specifically, the auxiliary vertical plate 148 is arranged on the right side of the first vertical plate 142 and on the left side of the sway cylinder 38. The auxiliary vertical plate 148 is arranged outside the machine body relative to the first vertical plate 142, and is arranged inside the machine body relative to the sway cylinder 38.

[0059] The auxiliary longitudinal plate 148 is configured in a plate shape and is vertically disposed on the upper surface of the revolving frame 14. The auxiliary longitudinal plate 148 is the same component that is integrated with the revolving frame 14. The auxiliary longitudinal plate 148 extends from the front to the rear on the revolving frame 14. The auxiliary longitudinal plate 148 is arranged obliquely relative to the first longitudinal plate 142 that also extends from the front to the rear. The auxiliary longitudinal plate 148 separates from the first longitudinal plate 142 toward the outside of the machine body (the right side in this embodiment) as it moves from the front to the rear. The front side of the auxiliary longitudinal plate 148 is bent toward the inside (left side) of the machine body, toward the first longitudinal plate 142. In detail, the front end portion of the auxiliary longitudinal plate 148 is connected to the first longitudinal plate 142. Thereby, the strength of the auxiliary longitudinal plate 148 can be enhanced.

[0060] The auxiliary vertical plate 148 is connected to the other end (rear end) of the sway cylinder (hydraulic cylinder) 38. In other words, the other end of the sway cylinder 38 is supported by the auxiliary vertical plate 148. In addition, the other end of the sway cylinder 38 is connected to the auxiliary vertical plate 148 in a manner that allows horizontal rotation. If such a structure is set, the sway cylinder 38 can be supported on the outside of the machine body of the auxiliary vertical plate 148 arranged at a position closer to the outside of the machine body than the first vertical plate 142. Therefore, the sway cylinder 38 can be easily arranged on the revolving frame 14 to avoid interference with other equipment.

[0061] In particular, in the present embodiment, the electric motor 5 is disposed at a position overlapping the first vertical plate 142 in a plan view. According to the structure of the present embodiment, the yaw cylinder 38 can be disposed while avoiding interference with the electric motor 5 .

[0062] In addition, in this embodiment, if Figure 3 As shown, the hydraulic pump 6 overlaps with the auxiliary vertical plate 148 in a plan view. The hydraulic pump 6 is on the upper side relative to the auxiliary vertical plate 148. The hydraulic pump 6 is smaller in size than the electric motor 5 and is not directly supported by the revolving frame 14. By arranging the auxiliary vertical plate 148 supporting the sway cylinder 38 below such equipment, the battery unit 4 and the electric motor 5, which are heavy and need to be firmly supported, can be supported in a wide range on the central side of the revolving frame 14 with high strength. As a result, the battery unit 4 with a large storage capacity can be installed.

[0063] Figure 4It is a side view schematically showing the relationship among the auxiliary vertical plate 148 , the yaw cylinder 38 , and the first vertical plate 142 . Figure 4 This is a diagram obtained by viewing the revolving frame 14 from the right. Figure 4 As shown, the auxiliary vertical plate 148 includes a connection portion 148a having a connection structure 1481 connected to the other end (rear end) of the yaw cylinder (hydraulic cylinder) 38. The auxiliary vertical plate 148 includes the connection portion 148a at the rear end thereof.

[0064] In detail, the connection structure 1481 has: an upper plate-like body 1481a; and a lower plate-like body 1481b arranged below the upper plate-like body 1481a. The upper plate-like body 1481a and the lower plate-like body 1481b protrude from the connecting portion 148a (auxiliary longitudinal plate 148) to the outside of the machine body. In detail, the upper plate-like body 1481a and the lower plate-like body 1481b protrude to the right from the right side surface of the connecting portion 148a and extend in the horizontal direction. The upper plate-like body 1481a and the lower plate-like body 1481b are arranged at intervals in the up-down direction. The rear end portion 38a of the sway cylinder 38 is arranged between the upper plate-like body 1481a and the lower plate-like body 1481b in the up-down direction. The rear end portion 38a of the sway cylinder 38 is horizontally rotatably connected to the upper plate-shaped body 1481a and the lower plate-shaped body 1481b via a pin member 149 penetrating the upper plate-shaped body 1481a and the lower plate-shaped body 1481b in the up-down direction.

[0065] like Figure 4 As shown, when viewed from the side in the left-right direction, the connecting portion 148a protrudes upward relative to the first longitudinal plate 142. The connecting portion 148a connecting the other end (rear end) of the sway cylinder 38 is easily increased in height in the vertical direction due to the provision of the connecting structure 1481. Therefore, if it is assumed that a connecting portion having a connecting structure is provided on the first longitudinal plate 142 existing on the inner side of the body, interference with the electric motor 5 and the like will become a problem. In this regard, in the present embodiment, the connecting portion 148a is provided on the auxiliary longitudinal plate 148 disposed at a position closer to the outside of the body than the first longitudinal plate 142. Therefore, the sway cylinder 38 can be arranged on the revolving frame 14 to avoid interference with larger equipment such as the electric motor 5 disposed on the inner side of the body.

[0066] In this embodiment, if Figure 3 As shown, the yaw cylinder (hydraulic cylinder) 38 is arranged in front of the hydraulic pump 6. Thus, the yaw cylinder 38 can be arranged avoiding the electric motor 5 and the battery unit 4 arranged inside the body (left side in this embodiment) of the hydraulic pump 6.

[0067] Figure 5 and Figure 6 It is a perspective view schematically showing the relationship between the yaw cylinder 38 and the hydraulic oil tank 9 on the revolving frame 14 . Figure 5This is the picture viewed from the front left. Figure 6 This is a picture viewed from the left rear. Figure 3 , Figure 5 as well as Figure 6 As can be seen, the hydraulic oil tank 9 is arranged in front of the hydraulic pump 6. The hydraulic oil tank 9 is a tank that stores hydraulic oil discharged from the hydraulic pump 6. That is, the working machine 100 includes the hydraulic oil tank 9 that stores hydraulic oil discharged from the hydraulic pump 6 in front of the hydraulic pump 6.

[0068] Furthermore, the hydraulic pump 6 is driven to deliver the hydraulic oil in the hydraulic oil tank 9 to the control valve 7. The hydraulic oil delivered to the control valve 7 is delivered to the hydraulic actuator (hydraulic cylinders 35 to 38 and hydraulic motor 23, etc.) based on the control performed by the control valve 7. A portion of the hydraulic oil delivered to the control valve 7 that is not delivered to the hydraulic actuator is returned to the hydraulic oil tank 9. In addition, the hydraulic oil delivered to the hydraulic actuator is returned to the hydraulic oil tank 9 from the hydraulic actuator via an oil cooler (not shown).

[0069] like Figure 5 and Figure 6 As shown, the sway cylinder (hydraulic cylinder) 38 passes through a cutout 91 provided in the hydraulic oil tank 9. With such a structure, the space on the revolving frame 14 can be efficiently utilized. Specifically, the cutout 91 is provided in the lower part of the hydraulic oil tank 9. With respect to a part of the lower side of the hydraulic oil tank 9, the position of the left side wall is shifted to the right and the position of the bottom wall is shifted upward, thereby forming the cutout 91.

[0070] The sway cylinder (hydraulic cylinder) 38 is disposed between the auxiliary vertical plate 148 and the side wall 9a of the hydraulic oil tank 9 where the cutout portion 91 is provided. The side wall 9a corresponds to the left side wall at the lower portion of the hydraulic oil tank 9 and is located outside (to the right) of the machine body relative to the auxiliary vertical plate 148. The sway cylinder 38 is disposed between the right surface of the auxiliary vertical plate 148 and the side wall 9a in the left-right direction.

[0071] The auxiliary vertical plate 148 supports the bottom wall 9b of the portion of the hydraulic oil tank 9 where the cutout portion 91 is provided. Specifically, the auxiliary vertical plate 148 supports the left end portion of the bottom wall 9b. With such a structure, the auxiliary vertical plate 148 can be given a function of supporting the hydraulic oil tank 9 instead of only a function of supporting the sway cylinder 38. That is, with such a structure, the elements (supporting components) arranged on the revolving frame 14 can be reduced, and the equipment can be efficiently arranged on the revolving frame 14.

[0072] <3. Notes, etc.>

[0073] Various technical features disclosed in this specification can be modified in various ways without departing from the scope of the technical creation. In addition, multiple embodiments and modified examples shown in this specification can be combined and implemented within the possible scope.

[0074] <4. Notes>

[0075] An exemplary working machine of the present invention can be the following structure (first structure), that is, a working machine with a rotating body having a working device arranged at the front, wherein it comprises: a rotating frame constituting the bottom of the rotating body; a first longitudinal plate and a second longitudinal plate extending from the front to the rear on the rotating frame and arranged at intervals on the left and right; a swinging body supported on the rotating frame in a horizontally rotatable manner in front of the first longitudinal plate and the second longitudinal plate, and the swinging body supports the working device; a hydraulic cylinder arranged on the rotating frame on the outer side of the machine body on the side opposite to the second longitudinal plate side relative to the first longitudinal plate, and one end portion is connected to the swinging body; and an auxiliary longitudinal plate arranged on the rotating frame between the first longitudinal plate and the hydraulic cylinder and connected to the other end portion of the hydraulic cylinder.

[0076] It may be the following structure (second structure), that is, based on the working machine of the first structure, the auxiliary longitudinal plate has a connecting portion, the connecting portion has a connecting structure connected to the other end of the hydraulic cylinder, and when viewed from the side in the left and right directions, the connecting portion protrudes upward relative to the first longitudinal plate.

[0077] In the working machine of the first or second structure, a configuration (third configuration) may be adopted in which a front end portion of the auxiliary vertical plate is connected to the first vertical plate.

[0078] It may be the following structure (the fourth structure), that is, a working machine of any one of the first to third structures comprises: a battery unit, overlapping with the second longitudinal plate when viewed from above; an electric motor, using the electric power of the battery unit as a power source, overlapping with the first longitudinal plate when viewed from above; and a hydraulic pump, driven by the electric motor, overlapping with the auxiliary longitudinal plate when viewed from above.

[0079] In the working machine of the fourth configuration, a configuration (fifth configuration) may be adopted in which the hydraulic cylinder is disposed in front of the hydraulic pump.

[0080] The working machine of the fifth structure may include a hydraulic oil tank in front of the hydraulic pump, the hydraulic oil tank storing hydraulic oil discharged by the hydraulic pump, and the hydraulic cylinder passing through a cutout portion provided in the hydraulic oil tank.

[0081] In the working machine of the sixth configuration, the hydraulic cylinder may be arranged between the auxiliary vertical plate and a side wall of a portion of the hydraulic oil tank where the cutout portion is provided.

[0082] In the working machine of the seventh configuration, the auxiliary vertical plate may support a bottom wall of a portion of the hydraulic oil tank where the cutout portion is provided.

Claims

1. A working machine comprising a rotating body with a working device arranged at the front, characterized in that: have: A revolving frame, constituting the bottom of the revolving body; The first longitudinal plate and the second longitudinal plate extend from the front to the rear on the revolving frame and are arranged at intervals on the left and right sides; a swing body supported on the revolving frame in a horizontally rotatable manner in front of the first longitudinal plate and the second longitudinal plate, the swing body supporting the working device; a hydraulic cylinder disposed on the revolving frame at the outer side of the machine body on the side opposite to the second vertical plate side with respect to the first vertical plate, and having one end connected to the swing body; and The auxiliary vertical plate is disposed on the revolving frame between the first vertical plate and the hydraulic cylinder and is connected to the other end of the hydraulic cylinder.

2. The working machine according to claim 1, characterized in that: The auxiliary vertical plate includes a connecting portion having a connecting structure connected to the other end of the hydraulic cylinder. The connecting portion protrudes upward relative to the first vertical plate when viewed from the left-right side.

3. The working machine according to claim 1 or 2, characterized in that: The front end portion of the auxiliary vertical plate is connected to the first vertical plate.

4. The working machine according to claim 1, characterized in that: have: a battery unit overlapping the second longitudinal plate when viewed from above; an electric motor, which uses the power of the battery unit as a power source and overlaps the first longitudinal plate when viewed from above; as well as The hydraulic pump is driven by the electric motor and overlaps the auxiliary vertical plate in a plan view.

5. The working machine according to claim 4, characterized in that: The hydraulic cylinder is arranged in front of the hydraulic pump.

6. The working machine according to claim 5, characterized in that: A hydraulic oil tank is provided in front of the hydraulic pump, and the hydraulic oil tank stores hydraulic oil discharged by the hydraulic pump. The hydraulic cylinder passes through a cutout portion provided in the hydraulic oil tank.

7. The working machine according to claim 6, characterized in that: The hydraulic cylinder is disposed between the auxiliary vertical plate and a side wall of a portion of the hydraulic oil tank where the cutout portion is provided.

8. The working machine according to claim 7, characterized in that: The auxiliary vertical plate supports a bottom wall of a portion of the hydraulic oil tank where the cutout portion is provided.

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