JP2007291602A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of parts constituting a frame, reduce the weight of a construction machine, and miniaturize the construction machine by attaching a tank to the frame without using a pedestal. <P>SOLUTION: Front and rear projections 8, 9 for suspension positioned on an upper side are provided on an outer side face of a right vertical plate 6C of the turning frame 6, and a projection 10 for preventing swing positioned on a lower side of the right vertical plate 6C is provided. Front and rear brackets 19, 20 of the fuel tank 17 are suspended and attached to each projection 8, 9 for suspension, and a lower side of the fuel tank 17 is fixed to the projection 10 for preventing swing. Consequently, since the fuel tank 17 is arranged by suspending it from the front and rear projections 8, 9 for suspension provided in the turning frame 6, the pedestal for loading the fuel tank becomes unnecessary, and the weight and size of the turning frame 6 can be reduced. The lower side of the fuel tank 17 can be fixed by using the projection 10 for preventing swing to stop the swing of the fuel tank 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a construction machine such as a hydraulic crane or a hydraulic excavator, and more particularly to a construction machine provided with a tank for storing fuel, hydraulic oil, or the like.

  In general, construction machines include a hydraulic crane that transports materials and the like from the ground to a high place, a hydraulic excavator that performs excavation work of earth and sand, and the like. The construction machine is configured by a lower traveling body capable of self-running, an upper revolving body mounted on the lower traveling body so as to be able to swivel, and a work device provided on the upper revolving body.

  The upper swing body has a swing frame formed as a strength member by attaching left and right vertical plates extending forward and rearward on the bottom plate, and a working device is provided on the front side of the swing frame. On the rear side, a counterweight that balances the weight with the working device is provided. In addition, an engine that is a power source, a hydraulic pump driven by the engine, a fuel tank that stores fuel to be supplied to the engine, a hydraulic oil tank that stores hydraulic oil, and the like are mounted on the turning frame.

  Here, the swivel frame is provided with a cantilevered base that has a base end attached to the outer surface of the vertical plate and a distal end that extends leftward and rightward, and a fuel tank, for example, is provided on the base. (For example, refer to Patent Document 1).

JP 2002-180497 A

  By the way, according to the invention of Patent Document 1 described above, the gantry on which the fuel tank is placed is attached in a cantilevered manner to the vertical plate of the revolving frame. In addition, the fuel tank mounted on the gantry is formed in a large size to store a large amount of fuel, and the weight is increased accordingly.

  Therefore, it is necessary to make the gantry large so that a large fuel tank can be mounted. In addition, the cantilever structure has a problem that it must be formed with high strength using a thick steel plate and many parts in order to support a heavy fuel tank.

  Moreover, since the gantry formed in a large size requires an installation space, there is a problem that other devices mounted on the revolving frame cannot be efficiently arranged, and the upper revolving unit is increased in size.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to reduce the weight, size and size of the frame by attaching a tank to the frame without using a gantry. An object of the present invention is to provide a construction machine capable of improving the assembly efficiency and the assembly workability.

  A construction machine according to the present invention is provided with a frame formed as a strength member by attaching a longitudinal plate extending forward and rearward on a bottom plate, a working device provided on the front side of the frame, and a rear side of the frame. And a counterweight that balances the weight of the working device.

  In order to solve the above-described problem, the feature of the configuration adopted by the invention of claim 1 is that the vertical plate located on one of the left and right sides of the frame is suspended above the outer surface. A protrusion for lowering is provided and an anti-swaying protrusion is provided on the lower side, and the upper part of the tank for storing the liquid is suspended in the hanging protrusion, and the lower side of the tank is It is in the structure fixed to the protrusion for a stop.

  According to a second aspect of the present invention, the tank is configured to be suspended using a pin with respect to the suspension protrusion.

  The invention of claim 3 is that the tank is arranged so that the back side facing the vertical plate fits between the bottom plate and the upper flange of the vertical plate.

  According to a fourth aspect of the present invention, the suspension protrusion comprises a front suspension protrusion located on the front side of the outer side surface of the vertical plate and a rear suspension protrusion located on the rear side. A front bracket and a rear bracket are respectively provided at positions corresponding to the front and rear suspension protrusions, and a pin is inserted between the front and rear suspension protrusions and the front and rear brackets to thereby suspend the suspension. The lower projection and the bracket are connected to each other.

  According to the first aspect of the present invention, since the tank is suspended from the suspension protrusion provided on the outer side surface of the vertical plate of the frame, the gantry required for placing the tank is removed from the frame. Can be abolished. Thereby, the frame can be reduced in weight by the amount of the frame made of the strength member, and the size can be reduced.

  In addition, the suspended tank does not require a gantry and can be arranged at a low position. Accordingly, since a space can be provided above the tank by the amount of the lowered tank, other devices can be arranged using this space, and the degree of design freedom can be increased. Moreover, the liquid supply operation can be easily performed by arranging the tank low. Furthermore, when the tank is extended upward using the space, the capacity of the tank can be increased.

  On the other hand, since the lower side of the suspending tank is in an open state, for example, piping, hose connection ports, drain cocks, and the like can be freely provided. In addition, it is possible to easily connect piping and hoses to these.

  In addition, when the tank is suspended, the lower side of the tank will sway, but by fixing the lower side of the tank to the anti-sway projection provided on the frame side, the tank can be prevented from shaking during operation and running. It is possible to improve reliability and life by preventing the tank from interfering with the frame and deforming.

  According to the second aspect of the present invention, the tank can be suspended from the suspension projection using the pin, and the tank can be attached to the frame with a simple configuration. Further, by forming a gap between the pin and the suspension projection at this time, even if the frame is deformed due to a load during operation, this deformation is absorbed by the gap between the pin and the suspension projection. And durability of the tank can be improved.

  According to the invention of claim 3, the vertical plate of the frame is erected on the bottom plate, and the upper flange is provided on the upper portion of the vertical plate. In this configuration, since the ends of the bottom plate and the upper flange are generally projected outward from the vertical plate, a space is formed between the vertical plate, the bottom plate, and the upper flange in the frame. On the other hand, since the suspended tank can be lowered to the vicinity of the bottom plate, the tank can be stored between the bottom plate and the upper flange. Thereby, a tank can be arrange | positioned using the space which is hard to use surrounded by the vertical board, the baseplate, and the upper flange, for example, the capacity | capacitance of a tank can be expanded.

  According to the invention of claim 4, the front and rear suspension projections on the frame side and the front and rear brackets on the tank side are aligned, and a pin is inserted between each suspension projection and bracket. By wearing it, the tank can be suspended from the frame with a simple operation.

  Hereinafter, as a construction machine according to an embodiment of the present invention, a crawler hydraulic crane will be described as an example, and will be described in detail with reference to FIGS.

  In FIG. 1, 1 shows the hydraulic crane by this Embodiment which comprises a construction machine. The hydraulic crane 1 includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 4 mounted on the lower traveling body 2 via a revolving device 3, and a front side of the upper revolving body 4. The working device 5 is generally constituted. Further, as shown in FIGS. 1 and 2, the upper swing body 4 includes a swing frame 6, a cab 11, a counterweight 12, winches 14, 15, 16 and a fuel tank 17 which will be described later. Furthermore, the working device 5 is configured by a boom 5A attached to a later-described turning frame 6 so as to be able to move up and down, and a load hanging hook (not shown) suspended from the tip of the boom 5A.

  Reference numeral 6 denotes a revolving frame that forms the base of the upper revolving structure 4. The revolving frame 6 is formed as a strength member and is attached to the lower traveling body 2 via a revolving device 3 so as to be revolving. Further, as shown in FIGS. 3 and 4, the revolving frame 6 has a bottom plate 6A that forms a lower horizontal plate extending in the front and rear directions, and is positioned on both the left and right sides of the bottom plate 6A and on the bottom plate 6A. It is composed of a left vertical plate 6B, a right vertical plate 6C, and the like that are erected and extend rearward. An upper flange 6D forming a part of the left vertical plate 6B is fixed to the upper side of the left vertical plate 6B, and an upper flange 6E forming a part of the right vertical plate 6C is fixed to the upper side of the right vertical plate 6C. Is fixed.

  Further, the front side of the revolving frame 6 is a boom attachment portion 6F to which the base end of the boom 5A of the work device 5 is attached. Further, on the right side surface of the swivel frame 6, there are a front suspension protrusion 8, a rear suspension protrusion 9, and an anti-swing protrusion 10 that are located closer to the rear side and support a fuel tank 17 (described later) in a suspended state. Is provided. Further, the swivel frame 6 has a left vertical plate 6B and a right vertical plate 6C arranged in the left and right directions with an interval therebetween so that three winches 14, 15, 16 described later can be interposed between the vertical plates 6B and 6C. Is arranged.

  Here, the upper flange 6D fixed to the upper end of the left vertical plate 6B, the upper flange 6E fixed to the upper end of the right vertical plate 6C, and the bottom plate 6A fixed to the lower ends of the vertical plates 6B and 6C, It protrudes from the vertical plates 6B and 6C to the outside in the left and right directions. Thereby, as shown in FIGS. 5 and 9, the revolving frame 6 is strengthened by the upper flanges 6D and 6E and the bottom plate 6A arranged in an I shape with respect to the vertical plates 6B and 6C. Further, on the right side of the right vertical plate 6C, a concave space 7 is formed between the upper flange 6E protruding outward in the left and right directions and the bottom plate 6A, and this concave space 7 is generally arranged with devices. It is a dead space that is difficult to do.

  Reference numeral 8 denotes a front suspension protrusion provided on the upper side of the right side surface of the revolving frame 6 and provided near the rear side. The front suspension protrusion 8 is a vertical plate that protrudes from the right upper flange 6E to the left and to the right and is on the right side, and a suspension pin 23 (described later) is loose at the tip. A hanging pin hole 8A to be inserted in the fitted state is formed.

  Reference numeral 9 denotes a rear suspension protrusion provided on the rear portion located on the right side of the revolving frame 6 and spaced rearward from the front suspension protrusion 8. As shown in FIG. 5, the rear suspension protrusion 9 is also provided as a rib for reinforcing the right vertical plate 6C, and protrudes to the right at substantially the same height as the front suspension protrusion 8. Is provided. In addition, a suspension pin hole 9A is formed substantially coaxially with the suspension pin hole 8A of the front suspension protrusion 8 at the tip of the rear suspension protrusion 9.

  Here, the front suspension protrusion 8 and the rear suspension protrusion 9 are provided on the revolving frame 6 in a cantilever structure, and suspend and support a fuel tank 17 that stores a large amount of fuel at the tip side. . For this reason, when the suspension protrusions 8 and 9 are formed long, a downward moment is increased, and an excessive stress is applied to the attachment portion of the suspension protrusions 8 and 9 with respect to the turning frame 6. End up. Therefore, as shown in FIG. 9, each of the suspension protrusions 8 and 9 is short so that excessive stress does not act. For example, the length is about one third to one quarter of the width of the fuel tank 17. It is set to. As a result, the suspension protrusions 8 and 9 are formed on the revolving frame 6 by a normal welding operation using a general steel plate without using a steel plate having a large plate thickness or performing special processing or welding. Can be installed.

  Reference numeral 10 denotes an anti-sway projection provided on the lower side of the right vertical plate 6 </ b> C, located substantially in the middle between the front suspension projection 8 and the rear suspension projection 9. This anti-swaying projection 10 stops the swaying of the suspended fuel tank 17 in cooperation with an anti-sway bracket 21 and an engagement pin 22 of the fuel tank 17 described later. Further, a pin hole 10A through which the engagement pin 22 is inserted is formed at the tip of the anti-swing projection 10.

  Here, when the fuel tank 17 is suspended by the suspension protrusions 8 and 9, the fuel tank 17 is centered on suspension pins 23 to be described later that are inserted into the suspension protrusions 8 and 9. The lower side swings left and right. On the other hand, the anti-sway projection 10 is connected to a later-described anti-sway bracket 21 provided on the fuel tank 17 side, thereby fixing the lower side of the fuel tank 17 in the left and right directions to stop the shaking. Is.

  Further, the center of gravity of the fuel tank 17 suspended by the suspension protrusions 8 and 9 is located on the left and right outside of the position of the suspension pin 23 that is the suspension position. The fuel tank 17 is pressed against the right vertical plate 6C. At this time, the anti-swaying protrusion 10 fixes the lower side of the fuel tank 17 as described above, thereby receiving a moment that acts to press the fuel tank 17 against the right vertical plate 6C. The mounting posture of the tank 17 can be fixed.

  Reference numeral 11 denotes a cab provided at a corner position on the right front side of the revolving frame 6. The cab 11 is used by an operator. Further, inside the cab 11, a driver's seat, an operation lever, and the like (all not shown) are arranged on a floor board. Reference numeral 12 denotes a counterweight mounted on the rear portion of the revolving frame 6, and the counterweight 12 balances the weight with respect to the work device 5.

  Reference numeral 13 denotes a building cover provided on the revolving frame 6. The building cover 13 is provided on the left side of the left vertical plate 6B. For example, a left cover unit 13A that covers an engine, a hydraulic pump, etc. (none of which are shown), and a right cover unit that is provided on the right side of the right vertical plate 6C. 13B. Further, as shown by a dotted line in FIG. 6, a fuel tank 17 is housed in the lower portion of the right cover portion 13 </ b> B, and the boom hoisting rope winch 16 is raised and lowered above the fuel tank 17. The hydraulic motor 16B for use is accommodated.

  Reference numeral 14 denotes a main winding rope winch (see FIG. 2 and the like) which is located between the left and right vertical plates 6B and 6C and is located on the front side of the revolving frame 6. The load hanging hook is raised and lowered. The main winding rope winch 14 is roughly constituted by a main winding drum 14A for winding a main winding rope (not shown), a main winding hydraulic motor 14B for rotating the main winding drum 14A, and the like. Yes.

  Reference numeral 15 denotes an auxiliary winding rope winch provided on the revolving frame 6 at the rear side of the main winding rope winch 14. The auxiliary winding rope winch 15 is substantially the same as the main winding rope winch 14. The winding drum 15A, the auxiliary winding hydraulic motor 15B, and the like are roughly configured.

  Reference numeral 16 denotes a boom hoisting rope winch which is located on the rear side of the auxiliary winding rope winch 15 and is provided on the revolving frame 6. The boom hoisting rope winch 16 moves the boom 5A of the working device 5 up and down. Is. In addition, the boom hoisting rope winch 16 is roughly constituted by a hoisting drum 16A, a hoisting hydraulic motor 16B, and the like, in substantially the same manner as the main winding rope winch 14.

  Here, the boom hoisting rope winch 16 is disposed at substantially the same front and rear positions as a fuel tank 17 described later, and the hoisting hydraulic motor 16B protrudes to the right side beyond the right vertical plate 6C. In such an arrangement relationship, it is conceivable that the undulation hydraulic motor 16B interferes with the fuel tank 17, but as will be described later, by reducing the height position and height dimension of the fuel tank 17, the interference between the two is prevented. The hydraulic motor 16B for raising and lowering can be freely arranged.

  Reference numeral 17 denotes a fuel tank provided on the right rear side of the revolving frame 6. The fuel tank 17 stores liquid fuel therein. The fuel tank 17 is attached to the front suspension protrusion 8 and the rear suspension protrusion 9 in a suspended state. As shown in FIGS. 7 to 13, the fuel tank 17 is roughly constituted by a tank body 18, a front bracket 19, a rear bracket 20, an anti-sway bracket 21 and the like which will be described later.

  Reference numeral 18 denotes a tank main body that constitutes the main body of the fuel tank 17, and the tank main body 18 is, as shown in FIG. 7 to FIG. The rear surface portion 18B positioned, the left surface portion 18C positioned inside the left and right directions on the back side facing the right vertical plate 6C, the right surface portion 18D positioned outside the left and right directions, and the upper surface The top surface portion 18E and the bottom surface portion 18F located on the lower side constitute a rectangular parallelepiped container. Further, the tank body 18 has an oil supply port 18G for supplying fuel to the top surface portion 18E, and an outlet 18H for discharging the fuel toward the engine and a drain port 18J for draining water on the bottom surface portion 18F. is doing.

  Reference numeral 19 denotes a front bracket attached to the upper side of the front surface portion 18A of the tank body 18. The front bracket 19 corresponds to the front suspension protrusion 8 of the revolving frame 6 and is disposed on the left surface portion 18C side. A suspension pin hole 19 </ b> A through which a later-described suspension pin 23 is inserted is formed in the upper portion of the front bracket 19.

  On the other hand, reference numeral 20 denotes a rear bracket attached to the upper side of the rear surface portion 18B of the tank body 18. The rear bracket 20 corresponds to the rear suspension protrusion 9 of the revolving frame 6 and is disposed on the left surface portion 18C side. A suspension pin hole 20 </ b> A through which the suspension pin 23 is inserted is formed in the upper part of the rear bracket 20 substantially coaxially with the suspension pin hole 19 </ b> A of the front bracket 19.

  Reference numeral 21 denotes an anti-sway bracket (see FIGS. 11 and 12) attached to the bottom surface part 18F of the tank body 18, and the anti-sway bracket 21 together with the anti-sway projection 10 on the revolving frame 6 side, etc. This is to stop the shaking on the lower side. The anti-sway bracket 21 has a pair of pin mounting plates 21A facing in the front and rear directions.

  The anti-sway bracket 21 has the anti-sway projection 10 disposed between the pin mounting plates 21A, and engages with each pin mounting plate 21A so as to be inserted into the pin hole 10A of the anti-sway projection 10 in this state. The pin 22 is inserted. As a result, the anti-sway projection 10 and the anti-sway bracket 21 can be engaged by the engaging pin 22 and positioned left and right, so the lower side of the fuel tank 17 is fixed to the left and right. can do.

  Reference numeral 23 denotes a suspension pin for attaching the fuel tank 17 to the revolving frame 6 in a suspended state. The suspending pin 23 is formed as a round bar that is longer than the front and rear dimensions of the tank body 18. Further, on both end sides of the suspending pin 23, a retaining pin hole 23 </ b> A for inserting the retaining pin 24 is formed.

  As shown in FIGS. 7 and 8, the hanging pin 23 is hung before and after the hanging pin holes 19A and 20A of the front and rear brackets 19 and 20 are provided on the revolving frame 6 side. The fuel tank 17 is lifted so as to be positioned substantially in line with the hanging pin holes 8A and 9A of the lowering projections 8 and 9. In this state, the hanging pins 23 are moved in the order shown in FIG. , 9A, 19A, 20A. As a result, the suspension pin 23 can connect the brackets 19 and 20 on the fuel tank 17 side and the suspension projections 8 and 9 on the revolving frame 6 side, and the retention pin hole 23A has a retention pin. By inserting 24, the fuel tank 17 can be attached to the revolving frame 6 in a suspended state.

  Reference numeral 25 denotes a collar disposed between the front and rear suspension protrusions 8 and 9 and the front and rear brackets 19 and 20, respectively. The collar 25 fills the space between the front suspension protrusion 8 and the front bracket 19 and the space between the rear suspension protrusion 9 and the rear bracket 20, thereby allowing the fuel tank 17 to move forward and rearward. It functions as a regulating spacer.

  The hydraulic crane 1 according to the present embodiment has the above-described configuration. Next, an installation operation of the fuel tank 17 which is a characteristic part of the present embodiment will be described.

  First, the fuel tank 17 is disposed on the right rear side of the revolving frame 6, and the fuel tank 17 is lifted to approach the right vertical plate 6 </ b> C of the revolving frame 6. At this time, the tank body 18 is disposed between the bottom plate 6A and the upper flange 6E of the right vertical plate 6C, and the left surface portion 18C is brought close to the right vertical plate 6C at the same height. As a result, the left surface 18C side, which is the back side of the tank body 18, can be accommodated in the recessed space 7 defined by the bottom plate 6A, the right vertical plate 6C, and the upper flange 6E of the revolving frame 6, and a dead space is formed. The fuel tank 17 can be arranged using the recessed space 7 that has been provided.

  Next, the position of the fuel tank 17 is finely adjusted, and the front and rear suspension projections 8 and 9 of the front and rear brackets 19 and 20 are provided with the suspension pin holes 19A and 20A on the revolving frame 6 side. The pin holes 8A and 9A for suspending are arranged on a substantially straight line. In this state, as shown in FIG. 13, the suspension pins 23 are inserted into the respective pin holes 19 </ b> A, 20 </ b> A, 8 </ b> A, 9 </ b> A, and the retaining pins 24 are attached to both ends of the suspension pins 23. Thereby, the upper side of the fuel tank 17 can be attached in a suspended state to the suspension protrusions 8 and 9 on the revolving frame 6 side.

  Here, when the upper side of the fuel tank 17 is suspended with respect to the suspension protrusions 8 and 9, the lower side is not fixed, and therefore the fuel tank 17 swings left and right around the suspension pin 23. End up. Therefore, the anti-sway bracket 21 provided on the lower side of the fuel tank 17 is connected to the anti-sway projection 10 provided on the right vertical plate 6 </ b> C of the revolving frame 6 using the engagement pin 22. Thereby, the lower side of the fuel tank 17 can be fixed in the left and right directions.

  When the fuel tank 17 is attached to the right rear side of the revolving frame 6 in this way, a pipe is connected to the outlet 18H provided in the bottom surface portion 18F of the tank body 18. In addition, piping, wiring, etc. (all not shown) are connected. Here, since the lower side of the fuel tank 17 is in an open state, piping and wiring work can be easily performed. In addition, the drain port 18J for draining can be easily operated.

  Next, when the hydraulic crane 1 is assembled, the operator can get into the cab 11 and operate the operation lever or the like to run the lower traveling body 2 or to carry materials by the work device 5. it can.

  According to the present embodiment configured as described above, the front and rear suspension protrusions 8 and 9 are provided on the outer surface of the right vertical plate 6C of the revolving frame 6 on the upper side. An anti-swaying projection 10 is provided below the vertical plate 6C. In addition, brackets 19 and 20 at the front and rear of the fuel tank 17 are suspended and attached to the suspension protrusions 8 and 9, and the lower side of the fuel tank 17 is fixed to the anti-swing protrusion 10. .

  Therefore, since the fuel tank 17 can be hung on the front and rear suspension protrusions 8 and 9 provided on the revolving frame 6, the frame used to mount the fuel tank is eliminated. Can do. As a result, the revolving frame 6 can be reduced in weight and downsized by the amount that the frame is eliminated.

  In addition, since the fuel tank 17 is suspended, the frame can be removed from the lower side of the fuel tank 17 and the fuel tank 17 can be disposed at a low position. As a result, a space can be provided above the fuel tank 17 as much as the fuel tank 17 is lowered. Therefore, the hoisting hydraulic motor 16B of the boom hoisting rope winch 16 is arranged using this space. Can increase the degree of design freedom. Further, when the fuel tank 17 is extended upward using the upper space, the capacity of the tank body 18 can be increased, and the operation time can be extended.

  Further, when the fuel tank 17 is arranged low, the fuel filler opening 18G provided in the tank body 18 can also be arranged low. Thereby, the fuel supply operation | work can be performed easily and workability | operativity and safety | security can be improved.

  On the other hand, since the lower side of the suspended fuel tank 17 is open, the outlet 18H, the drain port 18J, and the like can be freely arranged on the bottom surface portion 18F of the tank body 18. Moreover, the operation | work which connects piping to the outflow port 18H, the operation | work which opens and closes the drain port 18J, etc. can be performed easily and exactly, without being disturbed by a mount frame. Also, inspection work and repair work of this part can be easily performed.

  Further, an anti-swing projection 10 is provided below the right vertical plate 6C of the revolving frame 6, and an anti-sway bracket 21 is provided on the bottom surface portion 18F of the tank body 18 in the fuel tank 17, and the anti-sway projection 10 is provided. By connecting the anti-sway bracket 21 with the engaging pin 22, the lower side of the fuel tank 17 can be fixed. As a result, during operation, the fuel tank 17 can be prevented from shaking during traveling, and the moment to try to press the fuel tank 17 against the right vertical plate 6C of the revolving frame 6 can also be received. Interference or deformation with the revolving frame 6 can be prevented, and reliability and life can be improved.

  Further, since the suspension pin 23 is used to suspend the fuel tank 17, the fuel tank 17 can be attached to the revolving frame 6 with a simple configuration, improving assembling workability, reducing manufacturing cost, and the like. Can be achieved.

  Moreover, the suspension pin holes 8A, 9A of the suspension protrusions 8, 9 are formed larger than the suspension pins 23. Thereby, for example, when the working device 5 cuts off the material, even if the swivel frame 6 may be deformed between the working device 5 and the counterweight 12, for each suspension by the deformation at this time The positional deviation of the protrusions 8 and 9 can be absorbed by the gap between the hanging pin holes 8A and 9A and the hanging pin 23. As a result, the durability of the fuel tank 17 can be improved.

  Furthermore, by making the fuel tank 17 suspending, the height position can be lowered and the height dimension can be lowered while securing the internal volume. Thereby, the back side of the tank main body 18 can be accommodated in the concave space 7 which is a difficult dead space defined by the bottom plate 6A, the right vertical plate 6C, and the upper flange 6E of the revolving frame 6. As a result, it is possible to improve the degree of freedom in design and increase the capacity of the fuel tank 17.

  In the embodiment, the case where the fuel tank 17 is configured to be suspended and applied to the fuel tank 17 that stores fuel as a tank that stores liquid therein has been described as an example. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic oil tank that stores hydraulic oil therein.

  Moreover, in embodiment, the hydraulic crane 1 which can be self-propelled by the lower traveling body 2 as a construction machine was mentioned as an example, and was demonstrated. However, the present invention is not limited to this, and may be applied to other construction machines such as a hydraulic crane and a hydraulic excavator fixed on a tower.

It is a front view which shows the hydraulic crane applied to embodiment of this invention. It is a top view which shows the hydraulic crane of FIG. 1 in the state which abbreviate | omitted the working device. It is an enlarged front view which shows a turning frame alone. It is an enlarged plan view which shows a turning frame alone. It is a principal part expansion perspective view which expands and shows the protrusion for suspension and the protrusion for rocking | fluctuation before and after provided in the turning frame. It is a principal part enlarged front view which shows the arrangement | positioning relationship between a fuel tank and a hydraulic motor in a building cover. It is a front view which shows the attachment state of the fuel tank with respect to a turning frame. It is a top view which shows the attachment state of the fuel tank with respect to a turning frame. It is sectional drawing which looked at the attachment state of the fuel tank with respect to a turning frame from the arrow IX-IX direction in FIG. It is a perspective view which shows a fuel tank alone. It is a perspective view which shows the bottom part side of a fuel tank. It is a principal part expansion perspective view which shows the state which has connected the protrusion for rocking | fluctuation, and the bracket for rocking | fluctuation with the engagement pin. It is an exploded plan view of the principal part expansion shown in the state which decomposed | disassembled the turning frame, the fuel tank, the pin for suspension, etc.

Explanation of symbols

1 Hydraulic crane (construction machine)
5 Working device 6 Rotating frame 6A Bottom plate 6B Left vertical plate 6C Right vertical plate 6D, 6E Upper flange 7 Recessed space 8 Front suspension projection 9 Rear suspension projection 10 Anti-swing projection 11 Cab 12 Counterweight 16 Boom raising / lowering Rope winch 16A hoisting drum 16B hoisting hydraulic motor 17 fuel tank 18 tank body 19 front bracket 20 rear bracket 21 anti-sway bracket 23 suspension pin

Claims (4)

Weight of the frame formed as a strength member by attaching a vertical plate extending forward and rearward on the bottom plate, a working device provided on the front side of the frame, and a working device provided on the rear side of the frame In a construction machine comprising a counterweight for balancing,
On the outer surface of the vertical plate located on one of the left and right sides of the frame, a suspension projection is provided on the upper side, and an anti-swing projection is provided on the lower side, the suspension projection. The construction machine is characterized in that the upper side of the tank for storing the liquid is suspended and provided, and the lower side of the tank is fixed to the anti-sway projection.   The construction machine according to claim 1, wherein the tank is configured to be suspended using a pin with respect to the suspension protrusion.   The construction machine according to claim 1 or 2, wherein the tank is configured so that a back side facing the vertical plate is placed between the bottom plate and an upper flange of the vertical plate.   The suspension protrusion is composed of a front suspension protrusion located on the front side of the outer surface of the vertical plate and a rear suspension protrusion located on the rear side, and the tank includes the front and rear suspension protrusions. A front bracket and a rear bracket are respectively provided at positions corresponding to the lowering projections, and a pin is inserted between the front and rear hanging projections and the front and rear brackets to thereby connect the hanging projection and the bracket. The construction machine according to claim 1, wherein the construction machine is configured to be coupled.

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