JP2020045658A - Construction machine - Google Patents

Abstract

To improve a maintainability of a hydraulic pump and increase a stability of a post-treatment device stand.SOLUTION: A post-treatment device stand 25 that supports an exhaust gas post-treatment device 14 comprises a front support leg 26 and a rear support leg 28 erected on a revolving frame 5 with a hydraulic pump 11 interposed therebetween in front and rear directions, and a support member 30 provided at upper ends of the front support leg 26 and the rear support leg 28 and to which the exhaust gas post-treatment device 14 is attached. A pump housing chamber 31 for housing the hydraulic pump 11 is formed between the front support leg 26 and the rear support leg 28 and the support member 30. A lower surface plate 30A of the support member 30 is disposed above a plurality of bolts 12 for attaching the hydraulic pump 11 to an engine 9. Between the support member 30 and the front support leg 26 and the rear support leg 28, a reinforcing member 32 for increasing mounting strength of the front and rear support legs 26, 28 and the support member 30 is provided.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a construction machine such as a hydraulic shovel provided with an exhaust gas post-processing device for purifying exhaust gas from an engine, for example.

  2. Description of the Related Art Generally, a hydraulic excavator, which is a typical example of a construction machine, includes a lower traveling body capable of traveling forward and backward, and an upper revolving body pivotally mounted on the lower traveling body to form a vehicle body. A work device for performing an excavation operation or the like is provided on the front side of the robot so as to be capable of elevating.

  The upper revolving superstructure, a revolving frame serving as a support structure, a cab provided on the front side of the revolving frame, on which an operator rides, an engine mounted on the rear side of the revolving frame, and a hydraulic pump mounted on the engine, The exhaust gas aftertreatment device is connected to the exhaust side of the engine via an exhaust pipe, and a building cover provided on a revolving frame to cover these devices is roughly configured.

  Here, as the exhaust gas post-processing device, an exhaust gas purifying device for removing harmful substances contained in the exhaust gas, a silencer (exhaust muffler) for reducing noise of the exhaust gas, and the like are known. As the exhaust gas purifying device, there are a particulate matter removing device for removing particulate matter (PM), a NOx purifying device for purifying nitrogen oxides (NOx), and the like, which are used alone or in combination as appropriate. can do.

  The exhaust gas post-processing device is provided on the rear side of the turning frame via a post-processing device stand. The post-processing device mount usually includes a pair of support legs disposed to face each other with the hydraulic pump interposed therebetween, and a support member provided on the upper end side of the pair of support legs and supporting the exhaust post-processing device. In addition, it is arranged so as to straddle the upper side of the hydraulic pump (for example, see Patent Document 1).

JP 2012-97413 A

  By the way, since the post-processing apparatus frame according to the related art is disposed so as to straddle the upper side of the hydraulic pump, a pump housing space formed between the pair of support legs and the support member is narrow. For this reason, there is a problem that workability when performing maintenance on the hydraulic pump housed in the pump housing space is reduced. On the other hand, it is conceivable to improve the maintainability of the hydraulic pump by moving the height position of the support member constituting the post-processing apparatus base upward and expanding the space of the pump housing space upward.

  However, when the height position of the support member of the post-processing device base is moved upward, the center of gravity of the exhaust gas post-processing device supported by the support member increases, and the stability of the post-processing device base decreases. There is a problem of doing.

  The present invention has been made in view of the above-described problems of the related art, and an object of the present invention is to provide a construction machine capable of improving the maintainability of a hydraulic pump and increasing the stability of a post-processing device stand. It is in.

  In order to solve the above-described problems, the present invention provides a vehicle body capable of traveling forward and backward, an engine mounted on the vehicle body, a hydraulic pump mounted on the engine using a plurality of bolts, A post-processing device mount provided on the vehicle body over the upper side of a pump; and an exhaust gas post-processing device attached to the post-processing device mount and performing post-processing on exhaust gas from the engine, the post-processing The device mount is provided with a pair of support legs erected on the vehicle body in a state of facing the front and rear directions across the hydraulic pump, and the exhaust gas post-processing device is provided on the pair of support legs. The present invention is applied to a construction machine having a support member, wherein a pump housing chamber for housing the hydraulic pump is formed between the pair of support legs and the support member.

  A feature of the present invention is that a lower surface of the support member is disposed at a position higher than the plurality of bolts for attaching the hydraulic pump to the engine, and the lower surface of the pair of support legs is provided between the support member and the pair of support legs. And a reinforcing member that shields oil scattered from the hydraulic pump to the engine through the pump housing chamber is provided detachably.

  ADVANTAGE OF THE INVENTION According to this invention, since the height position of a support member moves upward, the space in a pump accommodation room is expanded upward, and the workability | operativity at the time of performing maintenance with respect to a hydraulic pump can be improved. On the other hand, even when the height position of the support member moves upward, the stability of the post-processing apparatus gantry can be ensured by the reinforcing member provided between the pair of support legs and the support member.

1 is a front view illustrating a hydraulic shovel to which an embodiment of the present invention has been applied. FIG. 4 is a plan view showing a state where a counterweight, an engine, an exhaust gas post-processing device, and the like are mounted on a turning frame. FIG. 4 is an exploded perspective view showing a post-processing device base, a reinforcing member, and an oil scattering prevention plate. FIG. 4 is an exploded perspective view showing a revolving frame and a post-processing device gantry. FIG. 5 is an enlarged view of a main part of the hydraulic pump, the post-processing device mount, and the exhaust gas post-processing device as viewed from the direction indicated by arrows VV in FIG. It is a principal part enlarged view which shows the state which removed the oil scattering prevention plate in FIG. FIG. 7 is a cross-sectional view of an engine, a hydraulic pump, a post-processing device mount, a reinforcing member, an oil scattering prevention plate, and the like, as viewed from the direction of arrows VII-VII in FIG. 5. It is a perspective view which shows a reinforcement member by itself. It is a perspective view which shows an oil scattering prevention plate by itself. FIG. 2 is a configuration diagram schematically showing an exhaust gas post-processing device.

  Hereinafter, a crawler-type hydraulic excavator will be described as an example of a construction machine according to an embodiment of the present invention with reference to the accompanying drawings. In the present embodiment, the traveling direction of the excavator 1 to be described later will be referred to as a front and rear direction, and directions perpendicular to the traveling direction of the excavator 1 will be referred to as left and right directions.

  In FIG. 1, a vehicle body of a hydraulic excavator 1 includes a crawler-type lower traveling body 2 that can travel forward and backward, and an upper revolving body 3 that is rotatably mounted on the lower traveling body 2. . A working device 4 is provided on the front side of the upper revolving unit 3 so as to be able to move up and down, and the working device 4 can perform excavation work of earth and sand.

  The upper revolving unit 3 has a revolving frame 5 rotatably mounted on the lower traveling unit 2, and a counterweight 6 for balancing the weight with the working device 4 is provided at a rear end side of the revolving frame 5. ing. A cab 7 on which an operator rides is provided on the front left side of the turning frame 5. Further, a building cover 8 is provided on the turning frame 5 in front of the counterweight 6, and an engine 9, an exhaust gas post-processing device 14, a post-processing device stand 25, and the like described below are provided inside the building cover 8. Is housed.

  As shown in FIGS. 2 and 4, the revolving frame 5 is disposed at the center in the left and right directions and extends forward and rearward, and the revolving frame 5 is disposed on the left side of the center frame 5A and extends forward and rearward. A left side frame 5B and a right side frame 5C arranged on the right side of the center frame 5A and extending in the front and rear directions are roughly constituted. The center frame 5A includes a bottom plate 5A1 made of a thick steel plate and the like, and a left vertical plate 5A2 and a right vertical plate 5A3 which are erected on the bottom plate 5A1 and extend in the front and rear directions while facing left and right. It is comprised including.

  Between the center frame 5A and the left side frame 5B, a plurality of left overhanging beams 5D extending in the left and right directions are provided at intervals in the front and rear directions. The left side frame 5B is attached to the center frame 5A via the plurality of left overhanging beams 5D. On the other hand, between the center frame 5A and the right side frame 5C, a plurality of right overhanging beams 5E extending in the left and right directions are provided at intervals in the front and rear directions. The right side frame 5C is attached to the center frame 5A via the plurality of right overhanging beams 5E.

  Here, as shown in FIG. 4, three bolt insertion holes 5 </ b> F penetrating upward and downward are formed in the right rear overhanging beam 5 </ b> E <b> 1 disposed at the rearmost side of the plurality of right overhanging beams 5 </ b> E. Have been. A rear support leg 28 to be described later is mounted on the right rear overhang beam 5E1. Also, three bolt insertion holes 5G penetrating upward and downward are formed in the right front overhanging beam 5E2 disposed in front of the right rear overhanging beam 5E1. A front support leg 26 of a post-processing device base 25 described later is placed on the right front overhang beam 5E2.

  On the rear side of the center frame 5A, a left front engine support bracket 5H, a left rear engine support bracket 5J, a right front engine support bracket 5K, and a right rear engine support bracket 5L are located between the left vertical plate 5A2 and the right vertical plate 5A3. (See FIG. 4). The left front engine support bracket 5H and the left rear engine support bracket 5J are arranged near the left vertical plate 5A2 in a state where they are separated in the front and rear directions. The right front engine support bracket 5K and the right rear engine support bracket 5L are disposed near the right vertical plate 5A3 in a state where they are separated in the front and rear directions. These four engine support brackets 5H, 5J, 5K, 5L support the engine 9.

  The engine 9 is provided on the turning frame 5 in front of the counterweight 6. The engine 9 is elastically supported by the left front engine support bracket 5H, the left rear engine support bracket 5J, the right front engine support bracket 5K, and the right rear engine support bracket 5L provided on the revolving frame 5 via vibration isolating members. Have been. The engine 9 is constituted by a diesel engine, and is mounted on the turning frame 5 in a horizontal state in which a crankshaft (not shown) extends in the left and right directions. On one side (left side) of the engine 9 in the left and right directions, a cooling fan 9 </ b> A rotationally driven by the engine 9 is provided. The cooling fan 9A faces the heat exchanger 10 such as a radiator or an oil cooler, and the heat exchanger 10 is cooled by the outside air (cooling air) drawn into the building cover 8 by the rotation of the cooling fan 9A. Has become.

  The hydraulic pump 11 is mounted on the right side of the engine 9. The hydraulic pump 11 has, for example, a plurality of pumps (not shown) provided in parallel in one pump casing 11A, and the drive shafts of the plurality of pumps are simultaneously rotated via gears. I have. The respective pumps constituting the hydraulic pump 11 are driven by the engine 9 to discharge operating hydraulic oil to various hydraulic devices mounted on the hydraulic excavator 1. As shown in FIGS. 5 to 7, the pump casing 11A of the hydraulic pump 11 has a disk-shaped mounting flange 11B, and the mounting flange 11B is mounted to the engine 9 using a plurality of bolts 12. An oil supply port 11C is provided in an upper portion of the pump casing 11A, and a lubricating oil is supplied into the pump casing 11A through the oil supply port 11C to lubricate gears attached to the drive shafts of the respective pumps. Has become.

  Here, the exhaust gas discharged from the engine 9 is introduced into an exhaust gas post-processing device 14 through an exhaust pipe 13 connected to the exhaust side of the engine 9 and then discharged outside. That is, the proximal end of the exhaust pipe 13 is connected to the engine 9, and the distal end of the exhaust pipe 13 is connected to the exhaust gas post-processing device 14. As a result, harmful substances such as nitrogen oxides (NOx) contained in the exhaust gas of the engine 9 are removed by the exhaust gas post-processing device 14.

  The exhaust gas post-processing device 14 is provided above the hydraulic pump 11 in a state where the exhaust gas post-processing device 14 is attached to a post-processing device base 25 described later. The exhaust gas post-processing device 14 is connected to the engine 9 via the exhaust pipe 13 and processes harmful substances contained in exhaust gas from the engine 9. As shown in FIG. 10, the exhaust gas post-processing device 14 is configured to include a first exhaust gas post-processing device 15 and a second exhaust gas post-processing device 20, which will be described later.

  The first exhaust gas post-processing device 15 constitutes an exhaust gas post-processing device 14 together with the second exhaust gas post-processing device 20, and is arranged above the hydraulic pump 11. The first exhaust gas post-processing device 15 includes a cylindrical tubular body 16 extending in the front and rear directions. The cylindrical body 16 is formed as a closed container whose both ends are closed. An inflow port 16 </ b> A is provided on the upstream side of the cylindrical body 16, and the tip of the exhaust pipe 13 is connected to the inflow port 16 </ b> A.

  An oxidation catalyst 17 is provided in the cylinder 16. The oxidation catalyst 17 is made of, for example, a ceramic cylindrical body, has a large number of through holes formed in the axial direction, and has an inner surface coated with a noble metal or the like. The oxidation catalyst 17 oxidizes and removes carbon monoxide (CO), hydrocarbon (HC), and the like contained in the exhaust gas by flowing the exhaust gas through each through hole at a predetermined temperature. It is. Further, if necessary, the particulate matter (PM) is also burned off.

  The connection pipe 18 connects between the first exhaust gas post-processing device 15 and the second exhaust gas post-processing device 20. The inlet side of the connection pipe 18 is connected to the cylinder 16 of the first exhaust gas post-processing device 15, and the connection pipe 18 extends in the front and rear directions in parallel with the cylinder 16. A urea water injection nozzle 19 is attached to the rear end side of the connection pipe 18. The urea water injection nozzle 19 is connected to a urea water tank that stores an aqueous urea solution via a pump (neither is shown). The urea water injection nozzle 19 injects a urea aqueous solution toward exhaust gas flowing in the connection pipe 18.

  The second exhaust gas post-processing device 20 is disposed diagonally above and to the right of the first exhaust gas post-processing device 15. The second exhaust gas aftertreatment device 20 is connected to the outlet side of the connection pipe 18. The second exhaust gas post-processing device 20 includes a cylindrical cylinder 21 extending in the front and rear directions in parallel with the cylinder 16 of the first exhaust gas post-processing device 15. The cylindrical body 21 is formed as a closed container whose both ends are closed.

  In the cylinder 21, a selective reduction catalyst 22 and an oxidation catalyst 23 are provided. The selective reduction catalyst 22 is made of, for example, a ceramic cylindrical body, has a large number of through holes formed in the axial direction thereof, and has an inner surface coated with a noble metal. The selective reduction catalyst 22 selectively reduces the nitrogen oxides (NOx) contained in the exhaust gas discharged from the engine 9 by the ammonia in the urea aqueous solution injected from the urea water injection nozzle 19 to reduce nitrogen and water. Decompose into On the other hand, the oxidation catalyst 23 is made of a ceramic cylindrical body, almost similarly to the above-described oxidation catalyst 17, and has a large number of through holes formed in the axial direction, and the inner surface is coated with a noble metal. Thus, the oxidation catalyst 23 oxidizes residual ammonia remaining after the reduction of nitrogen oxides by the selective reduction catalyst 22, and separates it into nitrogen and water.

  The tail tube 24 is located at a rear portion on the downstream side of the tubular body 21, one end (lower end) in the length direction is inserted into the tubular body 21, and the other end projects radially upward from the tubular body 21. I have. Therefore, the exhaust gas discharged from the engine 9 is introduced into the exhaust gas post-processing device 14 by the exhaust pipe 13, is purified by the exhaust gas post-processing device 14, and is then discharged outside via the tail pipe 24. .

  Next, a post-processing device base 25 used for mounting the exhaust gas post-processing device 14 on the turning frame 5 will be described.

  The post-processing device base 25 is provided on the revolving frame 5 over the hydraulic pump, and supports the exhaust gas post-processing device 14 above the hydraulic pump 11. As shown in FIG. 3 to FIG. 7, the post-processing apparatus frame 25 is generally configured by a front support leg 26, a rear support leg 28, and a support member 30.

  The front support leg 26 is disposed on the front side of the hydraulic pump 11 and is attached to the right front overhanging beam 5E2 of the turning frame 5. The front support leg 26 is composed of a lower plate 26A abutting on the upper surface of the right front overhang beam 5E2, a vertical plate 26B extending upward from the lower plate 26A, and an upper plate 26C fixed to the upper end of the vertical plate 26B. ing.

  The lower plate 26A is formed as a rectangular plate extending leftward and rightward along the right front overhanging beam 5E2. The lower plate 26A is provided with three female screws 26A1 made of a welding nut or the like at positions corresponding to the three bolt insertion holes 5G provided in the right front overhang beam 5E2. The three bolts 27 are inserted into the respective bolt insertion holes 5G from below the right front overhang beam 5E2, and are screwed to the female screws 26A1 of the lower plate 26A. Thus, the front support leg 26 is attached to the right front overhang beam 5E2 using the bolt 27.

  The vertical plate 26B includes a middle plate 26B1 extending leftward and rightward along the lower plate 26A, a left bent plate 26B2 bent from the left end side of the middle plate 26B1 to the rear side (the rear support leg 28 side), and a middle plate. The right bent plate 26B3 bent rearward from the right end side of the plate 26B1 forms a plate having a U-shaped cross section. The vertical plate 26B is fixed to the lower plate 26A by means of welding or the like, extends upward from the lower plate 26A, and an upper plate 26C is attached to the upper end of the vertical plate 26B. Here, a front extension plate 26D that extends rearward from the left bending plate 26B2 is provided on the upper end side of the left bending plate 26B2. Two female screws 26D1 (only one is shown in FIG. 3) made of a welding nut or the like are provided on the front overhang plate 26D at intervals in the front and rear directions, and a reinforcing member 32 described later is attached. ing.

  The upper plate 26C is fixed to the upper end of the vertical plate 26B by means such as welding. The upper plate 26C is formed as a rectangular plate extending in the left and right directions, and faces the lower plate 26A in the upper and lower directions. The front part of the support member 30 is attached to the upper surface side of the upper plate 26C.

  The rear support leg 28 is disposed on the rear side of the hydraulic pump 11 and is attached to the right rear overhang beam 5E1 of the turning frame 5. The rear support leg 28 forms a pair with the front support leg 26 in the front and rear directions, and the rear support leg 28 and the front support leg 26 face each other with the hydraulic pump 11 interposed therebetween in the front and rear directions. The rear support leg 28 includes a lower plate 28A that contacts the upper surface of the right rear overhang beam 5E1, a vertical plate 28B that extends upward from the lower plate 28A, and an upper plate 28C that is fixed to the upper end of the vertical plate 28B. Have been.

  The lower plate 28A is formed as a rectangular plate extending in the left and right directions along the right rear overhanging beam 5E1. The lower plate 28A is provided with three female threads 28A1 made of a welding nut or the like at positions corresponding to the three bolt insertion holes 5F provided in the right rear overhang beam 5E1. The three bolts 29 are inserted into the respective bolt insertion holes 5F from below the right rear overhanging beam 5E1, and screwed into the female screws 28A1 of the lower plate 28A. Thus, the rear support leg 28 is attached to the right rear overhang beam 5E1 using the bolt 29.

  The vertical plate 28B includes a middle plate 28B1 extending leftward and rightward along the lower plate 28A, a left bent plate 28B2 bent from the left end side of the middle plate 28B1 to the front side (the front support leg 26 side), and a middle plate. A right bent plate 28B3 bent forward from the right end side of 28B1 forms a plate having a U-shaped cross section. The vertical plate 28B is fixed to the lower plate 28A by means such as welding, extends upward from the lower plate 28A, and an upper plate 28C is attached to the upper end of the vertical plate 28B. Here, on the upper end side of the left bent plate 28B2, a rear overhang plate 28D that extends forward from the left bent plate 28B2 is provided. The rear overhang plate 28D is provided with two female screws 28D1 made of a welding nut or the like at intervals in the front and rear directions, and has a configuration in which the reinforcing member 32 is attached.

  The upper plate 28C is fixed to the upper end of the vertical plate 28B by means such as welding. The upper plate 28C is formed as a rectangular plate extending in the left and right directions, and faces the lower plate 28A in the upper and lower directions. A rear portion of the support member 30 is attached to the upper surface of the upper plate 28C. Here, the upper plate 26C of the front support leg 26 is disposed at a position higher than the upper end 11B1 of the mounting flange 11B provided on the hydraulic pump 11 (pump casing 11A) (see FIG. 7). Similarly, the upper plate 28C of the rear support leg 28 is arranged at a position higher than the upper end 11B1 of the mounting flange 11B of the hydraulic pump 11.

  The support member 30 is provided above the upper plate 26C of the front support leg 26 and the upper plate 28C of the rear support leg 28. The support member 30 extends forward and rearward between the front support leg 26 and the rear support leg 28 over the upper side of the hydraulic pump 11, and supports the exhaust gas post-processing device 14 above the hydraulic pump 11. ing. The support member 30 includes a lower plate 30A disposed above the front support leg 26 and the rear support leg 28, a front plate 30B and a rear plate 30C provided on the lower plate 30A at intervals in the front and rear directions, It is substantially constituted by a mounting base 30D provided between the face plate 30B and the rear plate 30C and provided on the lower plate 30A.

  The lower surface plate 30A is formed of a flat plate, and extends between the front support leg 26 and the rear support leg 28 in the front and rear directions. The front end of the lower plate 30A is fixed to the upper surface of the upper plate 26C of the front support leg 26, and the rear end of the lower plate 30A is fixed to the upper surface of the upper plate 28C of the rear support leg 28. The first exhaust gas post-processing device 15 is mounted on the upper surface side of the lower plate 30A. Here, two female screws 30E made of a welding nut or the like are provided on the left end side of the lower surface plate 30A and at an intermediate portion in the front and rear directions (length direction) with an interval in the front and rear directions. (See FIG. 3). A horizontal plate 32B of a reinforcing member 32 described later is attached to these two female screws 30E.

  Here, as shown in FIG. 7, the upper plate 26C of the front support leg 26 and the upper plate 28C of the rear support leg 28 are higher than the upper end 11B1 of the mounting flange 11B provided on the hydraulic pump 11 (pump casing 11A). It is located at a high position. Thus, the lower surface plate 30A constituting the lower surface of the support member 30 is disposed at a position higher than the plurality of bolts 12 for mounting the mounting flange 11B of the hydraulic pump 11 (pump casing 11A) to the engine 9.

  The front plate 30B extends upward from the front end side of the lower plate 30A. The front plate 30B includes a middle plate 30B1 extending leftward and rightward on the lower plate 30A, a left bent plate 30B2 bent from the left end side of the middle plate 30B1 to the front side (front support leg 26 side), and a middle plate 30B1. Is formed as a plate having a U-shaped cross section by a right bent plate 30B3 bent from the right end side to the front side.

  The rear plate 30C is disposed on the rear end side of the lower plate 30A so as to face the front plate 30B in the front and rear directions, and extends upward from the lower plate 30A. The rear plate 30C is formed in an L-shape by a substrate 30C1 extending leftward and rightward on the lower plate 30A, and a right bent plate 30C2 bent from the right end side of the substrate 30C1 to the rear side (the rear support leg 28 side). Is formed as a plate having a cross-sectional shape of.

  The mounting base 30D is provided between the front plate 30B and the rear plate 30C and provided on the lower plate 30A. The mounting pedestal 30D is formed of a plate bent in a crank shape, and includes a lower vertical plate 30D1 rising vertically upward from the lower surface plate 30A, and a horizontal plate 30D2 bent rightward from the upper end side of the lower vertical plate 30D1. And an upper vertical plate 30D3 which rises vertically upward from the right end of the horizontal plate 30D2. The front ends of the lower vertical plate 30D1, the horizontal plate 30D2, and the upper vertical plate 30D3 are fixed to the front plate 30B by means such as welding, and the rear ends of the lower vertical plate 30D1, the horizontal plate 30D2, and the upper vertical plate 30D3 are It is fixed to the rear face plate 30C by means such as welding. The second exhaust gas post-processing device 20 is mounted on the upper surface of the horizontal plate 30D2 constituting the mounting base 30D.

  The pump housing chamber 31 is formed between the front support leg 26 and the rear support leg 28 and the lower surface plate 30 </ b> A of the support member 30. The hydraulic pump 11 is housed in the pump housing chamber 31. Here, the lower surface plate 30 </ b> A constituting the lower surface of the support member 30 is disposed at a position higher than the plurality of bolts 12 for mounting the mounting flange 11 </ b> B of the hydraulic pump 11 to the engine 9. Therefore, the space in the pump housing chamber 31 is expanded upward. Therefore, a large working space is secured between the oil supply port 11C of the hydraulic pump 11 housed in the pump housing chamber 31 and the lower surface plate 30A of the support member 30. Accordingly, the operation of supplying the lubricating oil into the pump casing 11A through the oil supply port 11C can be smoothly performed in the expanded pump housing chamber 31.

  Next, the reinforcing member 32 attached to the post-processing apparatus base 25 will be described.

  The reinforcing member 32 is attached between the supporting members 26 and 28 before and after the post-processing device base 25 is formed and the supporting member 30, and the attachment strength of the supporting member 30 to the front and rear supporting legs 26 and 28 is reduced. Is increasing. The reinforcing member 32 is formed of a single plate extending in the front and rear directions between the front support leg 26 and the rear support leg 28 using a steel plate or the like. The reinforcing member 32 is disposed at a vertical plate 32A having a vertical surface attached to the front overhang plate 26D of the front support leg 26 and the rear overhang plate 28D of the rear support leg 28, and at an intermediate portion in front and rear directions of the vertical plate 32A. And a horizontal plate 32B having a horizontal surface attached to the lower surface plate 30A of the support member 30.

  The vertical plate 32A of the reinforcing member 32 is formed in a flat plate shape extending in the front and rear directions. A front portion 32A1 of the vertical plate 32A faces the front extension plate 26D of the front support leg 26, and a rear portion 32A2 of the vertical plate 32A. Faces the rear overhang plate 28D of the rear support leg 28. Above the front portion 32A1 of the vertical plate 32A, two bolt insertion holes 32A3 are formed at positions corresponding to the female screws 26D1 of the front extension plate 26D, and above the rear portion 32A2 of the vertical plate 32A, Two bolt insertion holes 32A4 are formed in the rear extension plate 28D at positions corresponding to the female screws 28D1.

  On the other hand, a notch 32A5 cut in a concavely curved shape upward from the lower edge of the vertical plate 32A is provided at an intermediate portion between the front and rear directions of the vertical plate 32A (between the front portion 32A1 and the rear portion 32A2). Are formed. As shown in FIG. 6, the cutout portion 32A5 has a shape that accommodates an upper portion of the pump casing 11A of the hydraulic pump 11 in a state where the reinforcing member 32 is attached to the post-processing device base 25. As a result, the gap between the front support leg 26 of the post-processing device base 25 and the upper portion of the hydraulic pump 11 is closed by the front portion 32A1 of the vertical plate 32A, and the rear support leg 28 and the upper portion of the hydraulic pump 11 are closed. Is closed by the rear portion 32A2 of the vertical plate 32A.

  Further, two notch grooves 32A6 cut in a groove shape upward are formed in the upper edge of the notch 32A5. These two notches 32A6 accommodate the bolts 12 for mounting the upper end 11B1 of the mounting flange 11B of the hydraulic pump 11 to the engine 9 in a state where the reinforcing member 32 is mounted on the post-processing device base 25. A plurality of (for example, seven) female screws 32A7 made of a welding nut or the like are provided at the lower edge of the vertical plate 32A at intervals in the front and rear directions. The plurality of female screws 32 </ b> A <b> 7 are screwed with bolts 36 for attaching an oil scattering prevention plate 35, which will be described later, to the reinforcing member 32.

  The horizontal plate 32B is provided at the upper end of the vertical plate 32A. The horizontal plate 32B is formed into a rectangular flat plate orthogonal to the vertical plate 32A and extending in the front and rear directions by bending the upper end side of the intermediate portion in the front and rear directions of the vertical plate 32A to the right from the vertical plate 32A. Is formed. As described above, the strength of the reinforcing member 32 can be increased by forming the vertical plate 32A and the horizontal plate 32B integrally by performing a bending process on a single steel plate material. The horizontal plate 32B faces the lower surface plate 30A of the support member 30, and two front and rear sides of the horizontal plate 32B are provided at positions corresponding to the two female screws 30E provided on the lower surface plate 30A. The bolt insertion hole 32B1 is formed.

  As shown in FIG. 3, bolts 33 (only one is shown) are inserted into two bolt insertion holes 32A4 formed in the rear portion 32A2 of the vertical plate 32A. The bolt 33 is provided on the rear extension plate 28D of the rear support leg 28 and is screwed to the screw 28D1. Similarly, bolts 33 are also inserted into two bolt insertion holes 32A3 formed in the front side portion 32A1 of the vertical plate 32A, and the bolts 33 are provided on the front extension plate 26D of the front support leg 26, so that the screws 33 26D1. On the other hand, bolts 34 (only one is shown) are inserted from below into the two bolt insertion holes 32B1 formed in the horizontal plate 32B. The bolt 34 is provided on the lower plate 30A of the support member 30 and is screwed to the screw 30E.

  As a result, the front portion 32A1 of the vertical plate 32A constituting the reinforcing member 32 is fixed to the front extension plate 26D of the front support leg 26 using the bolt 33, and the rear portion 32A2 of the vertical plate 32A uses the bolt 33. The rear support leg 28 is fixed to the rear overhang plate 28D. The horizontal plate 32B constituting the reinforcing member 32 is fixed to the lower plate 30A of the support member 30 using bolts. Therefore, the pair of front support legs 26 and rear support legs 28 and the support member 30 that constitute the post-processing apparatus base 25 are integrated via the reinforcing member 32, and the support members for the front support legs 26 and the rear support legs 28 are provided. The configuration is such that the mounting strength of the post-processing apparatus frame 30 can be increased and the strength of the entire post-processing apparatus base 25 can be increased. At this time, the notch 32A5 formed in the vertical plate 32A of the reinforcing member 32 accommodates an upper portion of the pump casing 11A of the hydraulic pump 11, and the notch groove 32A6 serves as the upper end 11B1 of the pump casing 11A (the mounting flange 11B). Accommodates a bolt 12 for attaching the bolt to the engine 9.

  Here, in the present embodiment, in order to expand the space in the pump accommodating chamber 31 upward, the lower surface plate 30A constituting the lower surface of the support member 30 has a plurality of mounting flanges 11B of the hydraulic pump 11 mounted on the engine 9. It is arranged at a position higher than the bolt 12. As described above, when the height position of the support member 30 of the post-processing device stand 25 is moved upward, the position of the center of gravity of the exhaust gas post-processing device 14 supported by the support member 30 increases. On the other hand, in the present embodiment, the pair of front support legs 26 and rear support legs 28 constituting the post-processing apparatus base 25 and the support member 30 can be integrated via the reinforcing member 32. As a result, even when the height position of the support member 30 of the post-processing device base 25 is moved upward and the space in the pump housing chamber 31 is expanded upward, the strength of the entire post-processing device base 25 can be increased. Thus, the exhaust gas post-processing device 14 can be stably supported.

  On the other hand, a notch 32A5 is provided in the vertical plate 32A of the reinforcing member 32, and the notch 32A5 has a shape for accommodating the upper part of the hydraulic pump 11 with the reinforcing member 32 attached to the post-processing device base 25. (See FIG. 6). As a result, the gap between the front support leg 26 of the post-processing device base 25 and the upper portion of the hydraulic pump 11 is closed by the front portion 32A1 of the vertical plate 32A, and the rear support leg 28 and the upper portion of the hydraulic pump 11 are closed. Is closed by a rear portion 32A2 of the vertical plate 32A.

  The oil scattering prevention plate 35 as an oil scattering prevention member is attached to the reinforcing member 32. The oil scattering prevention plate 35 is formed of a flexible plate such as a rubber sheet, for example. Here, as shown in FIG. 3 and FIG. 5, the oil scattering prevention plate 35 is attached to a front plate 35A attached to the front portion 32A1 of the vertical plate 32A constituting the reinforcing member 32 and a rear portion 32A2 of the vertical plate 32A. It is composed of two plate bodies with a rear side plate 35B to be attached. Four bolt insertion holes 35A1 corresponding to four of the seven female screws 32A7 provided on the vertical plate 32A of the reinforcing member 32 are formed in the front side plate 35A. Three bolt insertion holes 35B1 corresponding to the remaining three of the seven female screws 32A7 provided on the vertical plate 32A are formed in the rear side plate 35B.

  Bolts 36 (only one is shown) are inserted into three bolt insertion holes 35B1 formed in the rear plate 35B of the oil scattering prevention plate 35, respectively. The bolt 36 is provided on the vertical plate 32A of the reinforcing member 32 and is screwed to the screw 32A7. Similarly, bolts 36 are also inserted into four bolt insertion holes 35A1 formed in the front side plate 35A, and these bolts 36 are provided on the vertical plate 32A and screwed to the screws 32A7. Thereby, as shown in FIGS. 5 and 7, the oil scattering prevention plate 35 extends downward from the vertical plate 32 </ b> A of the reinforcing member 32. Accordingly, in the gap formed between the front support leg 26 of the post-processing device base 25 and the hydraulic pump 11, the range from the upper part to the intermediate part in the height direction of the hydraulic pump 11 is the oil scattering prevention plate 35. Is closed by the front side plate 35A. On the other hand, of the gap formed between the rear support leg 28 and the hydraulic pump 11, the range from the upper part to the intermediate part in the height direction of the hydraulic pump 11 is closed by the rear plate 35 </ b> B of the oil scattering prevention plate 35. Is done. Thus, the oil scattered from the hydraulic pump 11 toward the engine 9 can be shielded by the oil scatter prevention plate 35.

  In this case, the oil scattering prevention plate 35 is formed using a flexible rubber sheet or the like. Therefore, when the hydraulic pump 11 comes into contact with the oil scattering prevention plate 35 due to the vibration during the operation of the vehicle body, the oil scattering prevention plate 35 can be easily deformed. Therefore, damage to the hydraulic pump 11 can be avoided, and the shielded state between the engine room and the pump housing chamber 31 can be maintained even during operation of the vehicle body.

  The hydraulic shovel 1 according to the present embodiment has the above-described configuration, and its operation will be described next.

  First, the operator gets on the cab 7 and operates the engine 9. Then, the operator can run the hydraulic excavator 1 by operating a traveling operation lever (not shown) arranged in the cab 7 and operate the operation lever (not shown). By doing so, excavation work of earth and sand can be performed using the working device 4.

  Exhaust gas discharged from the engine 9 when the hydraulic excavator 1 operates is introduced into a first exhaust gas post-processing device 15 of an exhaust gas post-processing device 14 via an exhaust pipe 13. The exhaust gas is purified from the first exhaust gas post-processing device 15 while passing through the connecting pipe 18 and the second exhaust gas post-processing device 20, and is exhausted to the atmosphere through the tail pipe 24.

  Here, the post-processing device stand 25 that supports the exhaust gas post-processing device 14 is mounted on the turning frame 5 with the hydraulic pump 11 straddling from above. An oil supply port 11C is provided in the pump casing 11A of the hydraulic pump 11, and it is necessary to supply lubricating oil to the pump casing 11A periodically through the oil supply port 11C. For this reason, in the present embodiment, as shown in FIG. 7, the lower surface plate 30A of the support member 30 constituting the post-processing device base 25 is formed by a plurality of bolts 12 for attaching the mounting flange 11B of the hydraulic pump 11 to the engine 9. Is also located at a higher position.

  Therefore, the space in the pump housing chamber 31 formed between the front support leg 26 and the rear support leg 28 and the lower surface plate 30A of the support member 30 can be expanded upward. Therefore, a large working space is secured between the oil supply port 11C of the hydraulic pump 11 housed in the pump housing chamber 31 and the lower surface plate 30A of the support member 30. Thereby, the operation of supplying the lubricating oil into the pump casing 11A through the oil supply port 11C can be performed smoothly in the expanded pump housing chamber 31, and the workability can be improved.

  On the other hand, in order to expand the space in the pump housing chamber 31 upward, when the lower plate 30A constituting the post-processing device base 25 is arranged at a position higher than the plurality of bolts 12 for attaching the pump casing 11A to the engine 9, In this case, the position of the center of gravity of the exhaust gas post-processing device 14 supported by the support member 30 increases.

  On the other hand, in the present embodiment, the reinforcing member 32 is attached between the pair of front support legs 26 and the rear support legs 28 and the support member 30 that constitute the post-processing device base 25. Thereby, the front support leg 26, the rear support leg 28, and the support member 30 can be integrated via the reinforcing member 32. As a result, even when the height position of the support member 30 of the post-processing device stand 25 is moved upward, the overall strength of the post-processing device stand 25 can be increased, and the exhaust gas post-processing device 14 can be stably supported. can do.

  In addition, a notch 32A5 is provided in the vertical plate 32A of the reinforcing member 32. The notch 32A5 accommodates an upper portion of the hydraulic pump 11 in a state where the reinforcing member 32 is attached to the post-processing device base 25. (See FIG. 6). Thereby, the gap between the front support leg 26 of the post-processing device base 25 and the upper part of the hydraulic pump 11 is closed by the front part 32A1 of the vertical plate 32A, and the rear support leg 28 and the upper part of the hydraulic pump 11 are closed. Can be closed by the rear portion 32A2 of the vertical plate 32A. As a result, even when the oil scatters from the hydraulic pump 11, the oil from the hydraulic pump 11 is scattered to the engine 9 through the pump housing chamber 31 by shielding the oil with the vertical plate 32 </ b> A of the reinforcing member 32. Can be suppressed.

  On the other hand, an oil scattering prevention plate 35 formed of a flexible rubber sheet or the like is attached to the reinforcing member 32. As a result, of the gap formed between the front support leg 26 of the post-processing device stand 25 and the hydraulic pump 11, the range from the upper part to the intermediate part in the height direction of the hydraulic pump 11 and the rear support leg 28 The range from the upper part to the middle part in the height direction of the hydraulic pump 11 in the gap formed between the hydraulic pump 11 and the hydraulic pump 11 can be closed by the oil scattering prevention plate 35. As a result, even if oil scatters from the hydraulic pump 11 toward the engine 9, the oil can be reliably blocked by the oil scatter prevention plate 35.

  In this case, the oil scattering prevention plate 35 is formed using a flexible rubber sheet or the like. Therefore, when the hydraulic pump 11 comes into contact with the oil scattering prevention plate 35 due to the vibration during the operation of the vehicle body, the oil scattering prevention plate 35 can be easily deformed. Therefore, damage to the hydraulic pump 11 can be avoided, and the shielded state between the engine room and the pump housing chamber 31 can be maintained even during operation of the vehicle body.

  Thus, in the hydraulic excavator 1 according to the embodiment, the post-processing device base 25 that supports the exhaust gas post-processing device 14 is erected on the revolving frame 5 in a state where the post-processing device stand 25 faces the front and rear directions with the hydraulic pump 11 interposed therebetween. A front support leg 26 and a rear support leg 28; and a support member 30 provided at an upper end of the front support leg 26 and the rear support leg 28 and to which the exhaust gas post-processing device 14 is attached. A pump housing chamber 31 for housing the hydraulic pump 11 is formed between the support member 30 and the support member 30. The lower surface plate 30A of the support member 30 is disposed above the plurality of bolts 12 for attaching the hydraulic pump 11 to the engine 9, and reinforcement between the support member 30 and the front support legs 26 and the rear support legs 28 is provided. The member 32 is detachably provided.

  According to this configuration, the front support leg 26, the rear support leg 28, and the support member 30 can be integrated via the reinforcing member 32. As a result, the mounting strength of the support member 30 to the front support leg 26 and the rear support leg 28 can be increased. In addition, the gap between the front support leg 26 and the upper portion of the hydraulic pump 11 and the gap between the rear support leg 28 and the upper portion of the hydraulic pump 11 forming the post-processing device base 25 Can be closed. As a result, even if the oil scatters from the hydraulic pump 11, the oil from the hydraulic pump 11 scatters to the engine 9 through the pump housing chamber 31 by shielding the oil by the vertical plate 32 </ b> A of the reinforcing member 32. Can be suppressed.

  In the embodiment, the reinforcing member 32 is attached to the front support leg 26, the rear support leg 28, and the support member 30 while extending between the front support leg 26 and the rear support leg 28 in the front and rear directions. It is formed by a single plate body. According to this configuration, the front support leg 26, the rear support leg 28, and the support member 30 can be integrated via the reinforcing member 32 formed of a single plate, and the overall strength of the post-processing device stand 25 can be improved. Can be increased. In addition, the number of components of the reinforcing member 32 can be reduced, and workability when mounting the reinforcing member 32 on the post-processing apparatus base 25 can be improved.

  In the embodiment, an oil scattering prevention plate 35 that is made of a flexible plate and that prevents oil from scattering from the hydraulic pump 11 toward the engine 9 is attached to the reinforcing member 32. According to this configuration, of the gap formed between the front support leg 26 of the post-processing device stand 25 and the hydraulic pump 11, the range from the upper part to the intermediate part in the height direction of the hydraulic pump 11 and the rear part Of the gap formed between the support leg 28 and the hydraulic pump 11, the range from the upper part to the intermediate part in the height direction of the hydraulic pump 11 can be closed by the oil scattering prevention plate 35. As a result, even if the oil is scattered from the hydraulic pump 11 toward the engine 9, the oil can be prevented from adhering to the engine 9 by shielding the oil with the oil scatter prevention plate 35.

  In the above-described embodiment, the case where the reinforcing member 32 is formed of a single plate extending between the front support leg 26 and the rear support leg 28 in the front and rear directions is illustrated. However, the present invention is not limited to this, and the reinforcing member may be configured using, for example, two or more plate bodies.

  Further, in the embodiment, the case where the oil scattering prevention plate 35 is constituted by two plate members, that is, a front plate 35A and a rear plate 35B is illustrated. However, the present invention is not limited to this. For example, the oil scattering prevention plate may be configured by a single plate, or the oil scattering prevention plate may be configured by three or more plates.

  Further, in the above-described embodiment, the excavator 1 including the crawler-type lower traveling body 2 has been described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic shovel having a wheel-type lower traveling body, and may be widely applied to other construction machines such as a wheel loader, a dump truck, and a hydraulic crane. it can.

1 Hydraulic excavator (construction equipment)
2 Undercarriage (body)
3 Upper revolving superstructure (body)
Reference Signs List 9 engine 12 bolt 14 exhaust gas post-processing device 25 post-processing device stand 26 front support leg 28 rear support leg 30 support member 30A lower plate (lower surface)
31 Pump accommodation room 32 Reinforcement member 35 Oil scattering prevention plate

Claims (3)

A vehicle body that can travel in the front and rear directions,
An engine mounted on the vehicle body,
A hydraulic pump attached to the engine using a plurality of bolts,
A post-processing device mount provided on the vehicle body over the hydraulic pump,
An exhaust gas post-processing device attached to the post-processing device base and performing post-processing on exhaust gas from the engine;
The post-processing device mount includes a pair of support legs erected on the vehicle body in a state of facing the front and rear directions across the hydraulic pump, and the exhaust gas post-processing device provided on the pair of support legs. And a supporting member to which is attached,
A construction machine in which a pump housing chamber for housing the hydraulic pump is formed between the pair of support legs and the support member,
The lower surface of the support member is disposed above the plurality of bolts for attaching the hydraulic pump to the engine,
Between the support member and the pair of support legs, reinforcement for increasing attachment strength of the support member to the pair of support legs and shielding oil scattered from the hydraulic pump to the engine through the pump housing chamber. A construction machine, wherein a member is detachably provided.   The reinforcing member is formed by a single plate attached to the pair of support legs and the support member while extending between the pair of support legs in the front and rear directions. Item 6. The construction machine according to item 1.   The oil splattering plate which is made of a flexible plate and prevents oil splattering from the hydraulic pump toward the engine is attached to the reinforcing member. 3. The construction machine according to 2.

Images