JP5579453B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine provided with an exhaust gas processing device for processing exhaust gas of an engine.

  In general, a hydraulic excavator as a representative example of a construction machine is a self-propelled lower traveling body, an upper revolving body that is swingably mounted on the lower traveling body, and can be raised and raised on the front side of the upper revolving body. And a working device provided.

  The upper revolving structure includes a revolving frame that forms a support structure, a cab that is provided on the front side of the revolving frame, on which an operator rides, an engine that is mounted on the rear side of the revolving frame, and a length of the engine. A hydraulic pump provided on one side of the direction and an exhaust gas processing device connected to the exhaust manifold of the engine via an exhaust pipe are roughly constituted.

  As this exhaust gas treatment device, an exhaust gas purification device for removing harmful substances in the exhaust gas, a silencer for reducing noise of the exhaust gas, and the like are known. Further, as exhaust gas purification devices, there are particulate matter removal devices called particulate matter (PM) that collect and remove particulate matter, NOx purification devices that purify nitrogen oxides (NOx), etc. Can be used in combination.

  Here, a support member is attached to the engine so as to protrude toward the upper side of the hydraulic pump, and an exhaust gas treatment device is mounted on the support member (for example, Patent Documents 1, 2, 3, or 4). reference).

JP 2004-340114 A JP 2005-68810 A JP 2004-293495 A JP 2003-104071 A

  By the way, in the prior art mentioned above, it has the structure which attaches the support member for supporting an exhaust-gas processing apparatus to an engine with a volt | bolt. That is, in the mounting portion of the support member, the vertical load of the exhaust gas treatment device applied via the support member is supported by the frictional force based on the fastening force of the bolt. On the other hand, an exhaust gas processing device provided with an exhaust gas purification device required to satisfy exhaust gas emission standards is heavier than an exhaust gas processing device provided with only a silencer (exhaust muffler).

  For this reason, in the prior art mentioned above, when the weight of the exhaust gas treatment device is increased, there is a possibility that the vertical load of the exhaust gas treatment device applied to the support member cannot be sufficiently supported. That is, the mounting strength (support strength, holding strength) of the support member with respect to the engine cannot be sufficiently ensured, and for example, the exhaust gas treatment device may be shaken with long-term use.

  In order to secure the mounting strength of the support member, it is conceivable to increase the size of the bolt or increase the number of bolts. However, if, for example, a structure is used in which a bolt for attaching the hydraulic pump to the engine is used and the support member is tightened together with the hydraulic pump, the number of bolts to be tightened can be increased or increased. There is a limit, and there is a possibility that sufficient mounting strength cannot be secured.

  In addition, even if the size of the bolts to be tightened is increased or the number of bolts is increased, the support member is attached only at the portion to be tightened, and the center of gravity position is not increased as the weight of the exhaust gas treatment device increases. There is a risk that the support member may be deformed or damaged based on vibrations from the engine or the like. Although it is conceivable to reinforce the support member in order to prevent such deformation and damage, there is a problem that the support member is enlarged only by reinforcement.

  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 prevent the exhaust gas treatment device from rattling even if the exhaust gas treatment device is heavy, and to increase the size of the support member. It is to provide a construction machine that can suppress the conversion.

In order to solve the above-described problems, the present invention relates to a self-propelled vehicle body, an engine mounted on the vehicle body and surrounding the output shaft at the end of the housing , and a pump mounting portion of the engine. A hydraulic pump that is rotationally driven by the engine, a support member that is disposed on the upper side of the hydraulic pump, and an exhaust gas of the engine that is placed on the support member. The present invention is applied to a construction machine including an exhaust gas processing device for processing.

According to a first aspect of the present invention, the engine has a vertical mounting surface for mounting the support member at a position opposite to the hydraulic pump across the pump mounting portion. A support member mounting portion is provided, and the support member is fixed to the end portion of the flange portion of the hydraulic pump by joint fastening with the fastening member, and the hydraulic pressure from the upper end of the fixing portion. A mounting portion extending on the pump and mounting the exhaust gas treatment device; and an additional fixing portion fixed to the supporting member mounting portion at a position different from the fixing portion, and the supporting member is The fixing part, the mounting part, and the additional fixing part are configured as a single body by welding and / or bending, and the additional fixing part of the support member is formed from the end of the mounting part to the support member mounting part. Contact with vertical mounting surface It is formed in the mounting section integrally by forming folded so that in that is configured to be fixed to the supporting member mounting portion.

On the other hand , a feature of the configuration adopted by the invention of claim 2 is that the engine has a horizontal mounting surface for mounting the support member at a position opposite to the hydraulic pump across the pump mounting portion. A support member mounting portion is provided, and the support member is fixed to the end portion of the flange portion of the hydraulic pump by joint fastening with the fastening member, and the hydraulic pressure from the upper end of the fixing portion. A mounting portion extending on the pump and mounting the exhaust gas treatment device; and an additional fixing portion fixed to the supporting member mounting portion at a position different from the fixing portion, and the supporting member is The fixing part, the mounting part, and the additional fixing part are configured as a single body by welding and / or bending, and the additional fixing part of the support member is directed from the end of the mounting part to the support member mounting part. In a continuous state Is formed on the mounting portion integrally, and bent continuously plate from an end portion of the mounting section, bent so as to abut with the horizontal mounting surface of the support member attachment portion from the continuous plate part the support in that a configuration in which closed the mounting plate portion fixed to a member mounting portion.

According to the first and second aspects of the present invention, the support member includes the fixing portion, the mounting portion, and the additional fixing portion, and the fixing portion, the mounting portion, and the additional fixing portion are welded and / or Since it is configured as a single body by bending, the load of the exhaust gas treatment device applied to the support member can be shared and supported by the fixing portion and the additional fixing portion. For this reason, even when the weight of the exhaust gas treatment device increases, the mounting strength of the support member can be sufficiently ensured. As a result, it is possible to prevent the exhaust gas treatment device from rattling regardless of long-term use, and the exhaust gas treatment device can reliably remove harmful substances in the exhaust gas over a long period of time. Can increase the sex.

Moreover, it is possible to support by sharing the load of the exhaust gas treatment device acting on the support member by the additional fixing unit, the dimensions of the fastening member to be fastened in a state where the fixing portion in contact with the end surface of the flange portion of the hydraulic pump The mounting strength of the support member can be ensured without increasing (upsizing) or increasing the number of fastening members. Further, since the additional fixing portion is fixed to a supporting member mounting portion provided at a position opposite to the hydraulic pump with the pump mounting portion in the engine at a position different from the fixing portion, the center of gravity of the supporting member is The position can also be stabilized. For this reason, even if it employ | adopts the structure of joint fastening, it is not necessary to reinforce a supporting member excessively, and the space around a supporting member can be used effectively by suppressing the enlargement of this supporting member.

Furthermore, according to the first aspect of the invention, additional stationary portion of the support member is integral with the mounting portion by bent formed as from the end of the mounting portion abuts on the vertical mounting surface of the support member mounting part It is formed and fixed to the support member mounting portion . Therefore, Ru can secure the mounting strength of the support member as described above, in addition that the exhaust gas treatment apparatus rattling or the like can prevent, can be provided with additional fixing portion without increasing the number of parts Further, the manufacturing cost of the support member can be reduced .

On the other hand , according to the invention of claim 2 , the additional fixing portion of the support member is integrally formed with the mounting portion in a state of being continuous from the end of the mounting portion toward the support member mounting portion. And a mounting plate portion that is bent from the continuous plate portion so as to contact the horizontal mounting surface of the support member mounting portion and is fixed to the support member mounting portion . . Therefore, Ru can secure the mounting strength of the support member as described above, in addition that the exhaust gas treatment apparatus rattling or the like can prevent, can be provided with additional fixing portion without increasing the number of parts Further, the manufacturing cost of the support member can be reduced .

Is a front view showing a hydraulic excavator that by the reference example of the present invention. FIG. 2 is an enlarged plan view showing the upper swing body in FIG. 1 with the cab and the like omitted. It is a partially broken perspective view which shows an engine, a support member attaching part, a hydraulic pump, etc. by removing a support member. It is a principal part enlarged view which looked at the engine, the supporting member attachment part, the hydraulic pump, the supporting member, the exhaust gas processing apparatus, etc. from the arrow IV-IV direction in FIG. It is a principal part enlarged view which looked at the engine, the supporting member attachment part, the hydraulic pump, the supporting member, the exhaust gas processing apparatus, etc. from the arrow VV direction in FIG. It is a partially broken perspective view showing an engine, a support member mounting portion, a hydraulic pump, a support member, an exhaust gas processing device, and the like. It is sectional drawing of the principal part expansion which looked at an engine, the supporting member attaching part, the hydraulic pump, the supporting member, etc. from the arrow VII-VII direction in FIG. It is a perspective view which shows a supporting member alone. It is a perspective view which shows the supporting member by the 1st Embodiment of this invention alone. It is a partially broken perspective view which shows an engine, a support member attaching part, a hydraulic pump, etc. by removing a support member. It is sectional drawing similar to FIG. 7 which shows an engine, a supporting member attaching part, a hydraulic pump, a supporting member, etc. It is a perspective view which shows the supporting member by the 2nd Embodiment of this invention alone. It is sectional drawing similar to FIG. 7 which shows an engine, a supporting member attaching part, a hydraulic pump, a supporting member, etc.

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

First, FIGS. 1 to 8 show a reference example of the present invention. In FIG. 1, reference numeral 1 denotes a crawler hydraulic excavator as a construction machine. The hydraulic excavator 1 is mounted on a self-propelled lower traveling body 2 and on the lower traveling body 2 so as to be turnable. 2 is constituted roughly by an upper swing body 3 constituting a vehicle body, and a work device 4 provided on the front side of the upper swing body 3 so as to be able to move up and down and performing excavation work of earth and sand.

  Here, the upper swing body 3 constituting the hydraulic excavator 1 includes a swing frame 5, a cab 6, a counterweight 7, an engine 8, a hydraulic pump 13, an exhaust gas processing device 18, and the like which will be described later.

  Reference numeral 5 denotes a swing frame of the upper swing body 3, and the swing frame 5 is configured as a strong support structure. Then, as shown in FIG. 2, the revolving frame 5 is provided with a bottom plate 5A made of a thick steel plate or the like extending in the front and rear directions, and standing on the bottom plate 5A. A left vertical plate 5B and a right vertical plate 5C extending in the rear direction, and a left side frame 5D and a right side frame 5E arranged in the left and right directions of the vertical plates 5B and 5C with a space therebetween and extending in the front and rear directions. The base plate 5A and the vertical plates 5B and 5C project in the left and right directions, and are generally constituted by a plurality of projecting beams 5F that support the left and right side frames 5D and 5E at the front ends thereof. The working device 4 is attached to the front side of each of the vertical plates 5B and 5C so as to be able to move up and down, and the engine 8 described later is provided on the rear side of the turning frame 5. Yes.

  Reference numeral 6 denotes a cab (see FIG. 1) mounted on the left front side of the revolving frame 5 (left side of the foot part of the working device 4). The cab 6 is used by an operator, and a driver's seat on which the operator is seated, an operation lever for traveling, an operation lever for work, and the like (all not shown) are arranged.

  Reference numeral 7 denotes a counterweight attached to the rear end portion of the revolving frame 5. The counterweight 7 balances the weight with the working device 4 and protrudes so that the rear surface side is curved.

  Reference numeral 8 denotes an engine provided on the rear side of the revolving frame 5, and the engine 8 is mounted on the front side of the counterweight 7 so as to extend leftward and rightward. A cooling fan 8B for supplying cooling air to the heat exchanger 8A is provided on the left side of the engine 8. On the other hand, the right side of the engine 8 is a pump mounting portion 9 for mounting a hydraulic pump 13 described later. Further, an exhaust pipe 8C for exhaust gas exhaust is provided on the upper right side of the engine 8, and an exhaust gas processing device 18 to be described later is attached to an intermediate portion of the exhaust pipe 8C.

  Reference numeral 9 denotes a pump mounting portion provided at the right end portion of the housing 8 </ b> D that forms the outer shell of the engine 8. The pump mounting portion 9 is provided in an annular shape around the output shaft 8E (see FIG. 6) of the engine 8 so as to surround the output shaft 8E. It is what For this purpose, the pump mounting portion 9 is provided with a vertical surface 9A perpendicular to the axial direction of the output shaft 8E over the entire circumference, and a plurality of bottomed bolt holes 9B are provided in the vertical surface 9A in an annular shape. ing. And it is the structure which attaches the flange part 14 of the hydraulic pump 13 to the pump attachment part 9 using the fastening bolt 10 screwed together in each of these bolt holes 9B.

  Reference numeral 11 denotes a pair of support member mounting portions provided on the housing 8D of the engine 8, and each support member mounting portion 11 mounts an additional fixing portion 17C of the support member 17 described later. Here, as shown in FIG. 3, each support member mounting portion 11 is located at a position different from the pump mounting portion 9 in the housing 8 </ b> D of the engine 8, that is, on the opposite side of the hydraulic pump 13 across the pump mounting portion 9. On the upper side of the outer surface of the provided flywheel housing 8D1, they are spaced apart from each other in the front-rear direction.

  In this case, the upper surface of each support member mounting portion 11 is in a horizontal relationship that is perpendicular to the vertical surface 9A of the pump mounting portion 9, that is, in a positional relationship parallel to the axial direction of the output shaft 8E of the engine 8. It is a mounting surface 11A. Each horizontal mounting surface 11A is provided with a bottomed fixing bolt hole 11B (see FIG. 3). And it becomes the structure which fixes the additional fixing | fixed part 17C of the support member 17 mentioned later to each support member attaching part 11 using the pair of fixing bolt 12 screwed to each of these fixing bolt holes 11B (FIG. 4). reference).

  Reference numeral 13 denotes a hydraulic pump attached to the right side of the engine 8, and the hydraulic pump 13 is driven to rotate by the engine 8 and discharges hydraulic oil for operation toward various hydraulic actuators mounted on the hydraulic excavator 1. To do. Here, as shown in FIG. 4, an annular flange portion 14 corresponding to the pump mounting portion 9 of the engine 8 is provided at the left end portion facing the engine 8 of the housing 13 </ b> A forming the outer shell of the hydraulic pump 13. The flange portion 14 is provided with a plurality of bolt insertion holes 14 </ b> A corresponding to the bolt holes 9 </ b> B of the pump mounting portion 9 of the engine 8. Then, with the flange portion 14 butted against the vertical surface 9A of the pump mounting portion 9, each fastening bolt 10 is inserted into each bolt insertion hole 14A and screwed into each bolt hole 9B, whereby the hydraulic pump 13 is engine driven. 8 is attached.

  A hydraulic oil tank 15 (see FIG. 2) is provided on the right side of the revolving frame 5 and is located on the front side of the hydraulic pump 13. The hydraulic oil tank 15 is used for driving the lower traveling body 2, the working device 4, and the like. The hydraulic oil supplied to the hydraulic actuator is stored. Reference numeral 16 denotes a fuel tank (see FIG. 2) provided on the front side of the hydraulic oil tank 15. The fuel tank 16 stores fuel supplied to the engine 8.

Reference numeral 17 denotes a support member disposed on the upper side of the hydraulic pump 13, and the support member 17 is for supporting an exhaust gas processing device 18 described later on the upper side of the hydraulic pump 13. Here, as shown in FIGS. 4 to 8, the support member 17 has a fixing portion 17A formed in a U-shaped frame shape when viewed from above, and means such as welding on the upper end portion of the fixing portion 17A. A mounting portion 17B formed of a rectangular flat plate that is fixed using and extending in the horizontal direction, and an additional fixing that is formed in an L shape when viewed from the side and is fixed to the left end surface of the fixing portion 17A by means of welding or the like. The unit 17C is a single unit .

  Here, the fixing portion 17A includes an attachment portion 17A1 extending in the length direction (front and rear directions) of the exhaust gas treatment device 18, and reinforcement before and after being bent into a U-shape from both ends of the attachment portion 17A1. Part 17A2. A plurality of fixed portion side bolt insertion holes 17A3 are formed on the lower end side of the attachment portion 17A1 corresponding to the bolt insertion holes 14A provided in the flange portion 14 of the hydraulic pump 13. Then, the lower end side of the mounting portion 17A1 constituting the fixing portion 17A is brought into contact with the end surface of the flange portion 14 of the hydraulic pump 13, and the fastening is inserted through the fixing portion side bolt insertion hole 17A3 and the bolt insertion hole 14A of the flange portion 14. By screwing the bolt 10 into the bolt hole 9 </ b> B of the pump mounting portion 9, the fixing portion 17 </ b> A of the support member 17 is fixed to the flange portion 14 of the hydraulic pump 13 by fastening with the fastening bolt 10.

  On the other hand, the mounting portion 17B constituting the support member 17 is for mounting the exhaust gas processing device 18 on the upper surface via a mounting bracket 19 described later, and extends on the hydraulic pump 13 from the fixed portion 17A. It is fixed to this fixing portion 17A. In addition, a rectangular hole 17B1 for reducing the weight of the support member 17 is formed at the center of the mounting portion 17B, and mounting portion side bolt insertion holes 17B2 are formed at the four corners of the mounting portion 17B. .

  Further, the additional fixing portion 17C constituting the support member 17 is fixed to the support member mounting portion 11 of the engine 8 at a position different from the fixing portion 17A, so that the exhaust gas processing device applied to the support member 17 together with the fixing portion 17A. 18 loads are supported. Here, the additional fixing portion 17C is formed in a L-shaped cross-section by bending a rectangular flat plate made of metal, and is fixed to the left end surface of the fixing portion 17A by means such as welding. The fixing plate portion 17C1 and the mounting plate portion 17C2 bent at a right angle to the fixing plate portion 17C1. In this case, the lower surface of the mounting plate portion 17C2 has a right-angled positional relationship with the mounting portion 17A1 of the fixing portion 17A, and is a horizontal additional fixing surface 17C3 that faces the horizontal mounting surface 11A of the support member mounting portion 11. The mounting plate portion 17C2 is provided with a fixing bolt insertion hole 17C4 penetrating in the vertical direction.

  Then, as shown in FIG. 7, the fixing portion 17 </ b> A of the support member 17 is fastened to the flange portion 14 of the hydraulic pump 13 using the fastening bolt 10, and the horizontal attachment surface 11 </ b> A of the support member attachment portion 11 is additionally fixed. By horizontally contacting the horizontal additional fixing surface 17C3 of the portion 17C and screwing the fixing bolts 12 into the fixing bolt holes 11B of the support member mounting portion 11 through the fixing bolt insertion holes 17C4 of the additional fixing portion 17C, respectively. The additional fixing portion 17 </ b> C of the support member 17 is fixed to each support member mounting portion 11.

  Thus, in addition to fastening the fixing portion 17A of the supporting member 17 to the flange portion 14 of the hydraulic pump 13 using the fastening bolt 10, the additional fixing portion 17C provided on the supporting member 17 is fixed using the fixing bolt 12. By fixing to the support member mounting portion 11 of the engine 8, for example, even when the exhaust gas processing device 18 supported by the support member 17 is heavy, the mounting strength of the support member 17 can be sufficiently secured.

  Reference numeral 18 denotes an exhaust gas processing device mounted on the support member 17, and the exhaust gas processing device 18 processes exhaust gas discharged from the engine 8. As shown in FIGS. 5 and 6, the exhaust gas treatment device 18 includes a cylindrical case 18A formed as a single cylindrical container extending in the front and rear directions, and a front side (upstream side) of the cylindrical case 18A. ) From the rear side (downstream side) of the cylindrical case 18A and an exhaust port extending upward from the rear side (downstream side) of the cylindrical case 18A, and the cylindrical case 18A. And a processing apparatus main body (not shown).

  Here, the processing apparatus main body accommodated in the cylindrical case 18A will be described. As the processing apparatus main body, in order to collect and remove particulate matter (PM) contained in the exhaust gas, an oxidation catalyst or a filter is used. Known particulate matter removal devices, NOx purification devices that purify nitrogen oxides (NOx) contained in exhaust gas using an aqueous urea solution, silencers (exhaust mufflers) that reduce exhaust gas noise, and the like are known Yes. These treatment equipment bodies may be used alone as a silencer, but in recent years, they must be used in combination with exhaust gas purification equipment such as particulate matter removal equipment and NOx purification equipment in order to satisfy exhaust gas emission standards. There are many.

  Reference numeral 19 denotes a pair of mounting brackets provided on the cylindrical case 18A of the exhaust gas treatment device 18. The mounting bracket 19 has the same curvature as the outer peripheral surface of the cylindrical case 18A at the center as shown in FIG. It consists of a plate having an arcuate concave curved portion 19A, and the concave curved portion 19A is welded to the lower surface of the cylindrical case 18A. In addition, elongated bolt insertion holes 19 </ b> B are formed at both ends of the mounting bracket 19 that contacts the mounting portion 17 </ b> B of the support member 17. The nuts 21 are screwed into the support bolts 20 inserted through the bolt insertion holes 19B and the mounting portion side bolt insertion holes 17B2 of the mounting portion 17B, whereby the exhaust gas processing device 18 is connected via the mounting bracket 19. Is mounted on the mounting portion 17 </ b> B of the support member 17.

The hydraulic excavator 1 according to the reference example has the above-described configuration. Next, the operation of the hydraulic excavator 1 will be described.

  First, the operator gets on the cab 6 and sits on the driver's seat. By operating the operating lever in this state, the lower traveling body 2 can be driven to move the hydraulic excavator 1 forward or backward. Further, the operator seated in the driver's seat can perform the excavation work of earth and sand, etc. by operating the operation lever for work to move the working device 4 up and down.

  During operation of the hydraulic excavator 1, the exhaust gas discharged from the engine 8 is discharged into the atmosphere through the exhaust gas processing device 18. In this case, the exhaust gas treatment device 18 collects and removes particulate matter (PM) contained in the exhaust gas, for example, and NOx that purifies nitrogen oxide (NOx) contained in the exhaust gas. Since an exhaust gas purification device such as a purification device is built in, the weight of the exhaust gas processing device 18 tends to increase.

On the other hand, in the reference example , not only the fixing portion 17A but also the additional fixing portion 17C is provided on the support member 17 that supports the exhaust gas processing device 18. As shown in FIGS. 5 to 7, in addition to fastening the fixing portion 17A together with the flange portion 14 of the hydraulic pump 13 using the fastening bolt 10, the additional fixing portion 17C is used for the engine 8 using the fixing bolt 12. By fixing to the support member attaching portion 11, the load applied to the support member 17 is shared and supported by the fixing portion 17A and the additional fixing portion 17C.

Thus, according to the reference example , the load of the exhaust gas processing device 18 applied to the support member 17 can be shared and supported by the fixing portion 17A and the additional fixing portion 17C. Even when the thickness of the support member 17 increases, the mounting strength of the support member 17 can be sufficiently secured. As a result, the exhaust gas treatment device 18 can be prevented from rattling regardless of long-term use, and the exhaust gas treatment device 18 can reliably remove harmful substances in the exhaust gas over a long period of time. 1 reliability can be improved.

  Moreover, since the load of the exhaust gas treatment device 18 applied to the support member 17 can be shared and supported by the additional fixing portion 17C as described above, the dimensions of the fastening bolts 10 to be fastened can be increased (upsized). The mounting strength of the support member 17 can be secured without increasing the number of fastening bolts 10. Further, since the additional fixing portion 17C is fixed to the support member mounting portion 11 of the engine 8 at a position different from the fixing portion 17A (a position away from the fixing portion 17A), the position of the center of gravity of the support member 17 can be stabilized. For this reason, even when the co-fastening configuration is adopted, it is not necessary to reinforce the support member 17 excessively, and the space around the support member 17 can be effectively utilized by suppressing the increase in size of the support member 17. Can do.

  Further, since the horizontal additional fixing surface 17C3 of the additional fixing portion 17C and the horizontal mounting surface 11A of the support member mounting portion 11 are in contact with each other in the horizontal direction, the vertical load of the exhaust gas treatment device 18 applied to the support member 17 is applied to the horizontal mounting surface. 11A can be received with a large pressure receiving area. Further, the horizontal load applied to the support member 17 can be supported by the contact (friction) between the horizontal additional fixing surface 17C3 and the horizontal mounting surface 11A. For this reason, the attachment strength of the support member 17 can be ensured reliably, and it can prevent more reliably that the exhaust-gas processing apparatus 18 rattles.

Next, FIG. 9 to FIG. 11 show a first embodiment of the present invention. The feature of this embodiment is that the support member attaching portion and the additional fixing portion are fixed in contact with each other in the vertical direction. In the present embodiment, the same components as those in the reference example described above are denoted by the same reference numerals, and the description thereof is omitted.

In the figure, reference numeral 31 denotes a support member mounting portion provided in the housing 8D of the engine 8. The support member mounting portion 31 is used in the first embodiment in place of the support member mounting portion 11 according to the reference example described above. Is. Here, as shown in FIG. 10, the support member mounting portion 11 is located at a position different from the pump mounting portion 9 in the housing 8 </ b> D of the engine 8, that is, a flywheel housing provided adjacent to the pump mounting portion 9. It is provided on the opposite side of the hydraulic pump 13 across 8D1 and at a position above the flywheel housing 8D1.

  In this case, the end surface of the support member mounting portion 31 has a vertical positional relationship that is parallel to the vertical surface 9A of the pump mounting portion 9, that is, a vertical positional relationship with respect to the axial direction of the output shaft 8E of the engine 8. It is a surface 31A. The vertical mounting surface 31A is provided with a pair of fixing bolt holes 31B. And it is the structure which fixes the additional fixing | fixed part 33C of the support member 33 mentioned later to the support member attaching part 31 using the pair of fixing bolt 32 screwed together in each of these fixing bolt holes 31B.

Reference numeral 33 denotes a support member disposed on the upper side of the hydraulic pump 13. The support member 33 is used in the first embodiment instead of the support member 17 according to the reference example . Here, the support member 33 uses a fixing portion 33A formed in a U-shaped frame shape by the mounting portion 33A1 and the front and rear reinforcing members 33A2, and means such as welding on the upper end portion of the fixing portion 33A. The mounting portion 33B is fixed and extends in the horizontal direction, and an additional fixing portion 33C that is integrally formed with the mounting portion 33B by bending upward from the end of the mounting portion 33B. ing. Further, a plurality of fixed portion side bolt insertion holes 33A3 are formed in a circular arc shape on the lower end side of the attachment portion 31A1 of the fixed portion 33A. Further, a rectangular hole 33B1 is formed at the center of the mounting portion 33B, and mounting portion side bolt insertion holes 33B2 are formed at the four corners of the mounting portion 33B.

  On the other hand, the additional fixing portion 33C is fixed to the support member mounting portion 31 of the engine 8 at a position different from the fixing portion 33A. Here, the end surface of the additional fixing portion 33C has a positional relationship parallel to the mounting portion 33A1 of the fixing portion 33A, and is a vertical additional fixing surface 33C1 that faces the vertical mounting surface 31A of the support member mounting portion 31. The additional fixing portion 33C is provided with a fixing bolt insertion hole 33C2 penetrating in the plate thickness direction.

  Then, as shown in FIG. 11, with the fastening bolt 10, the fixing portion 33 </ b> A of the support member 33 is fastened to the flange portion 14 of the hydraulic pump 13, and the vertical attachment surface 31 </ b> A of the support member attachment portion 31 is additionally fixed. The vertical additional fixing surface 33C1 of the portion 33C is brought into contact with the vertical direction, and the fixing bolt 32 is screwed into the fixing bolt hole 31B of the support member mounting portion 31 through each fixing bolt insertion hole 33C2 of the additional fixing portion 33C. Thus, the additional fixing portion 33 </ b> C of the support member 33 is fixed to the support member mounting portion 31.

The hydraulic excavator 1 according to the first embodiment includes the support member mounting portion 31 and the support member 33 as described above. Even when the weight of the exhaust gas treatment device 18 is increased, the fixed portion 33A of the support member 33 The load can be shared and supported by the additional fixing portion 33C, and the mounting strength of the support member 33 can be sufficiently secured. Therefore, also in the present embodiment, it is possible to obtain the same effects as those of the reference example described above.

In the first embodiment, the vertical additional fixing surface 33C1 of the additional fixing portion 33C is brought into contact with the vertical mounting surface 31A of the support member mounting portion 31 in the vertical direction. Since the fixing bolt 32 is pressed against the vertical mounting surface 31A, the vertical load and the horizontal load applied to the support member 33 can be reliably supported. For this reason, the attachment strength of the support member 33 can be reliably ensured, and the exhaust gas processing device 18 can be reliably prevented from rattling.

Moreover, in the first embodiment, since the additional fixing portion 33C and the mounting portion 33B of the support member 33 are integrally formed, the additional fixing portion 33C can be provided without increasing the number of parts. Further, the manufacturing cost of the support member 33 can be reduced.

Next, FIGS. 12 to 13 show a second embodiment of the present invention. The feature of the present embodiment is that the support member attaching portion and the additional fixing portion are fixed in contact with each other in the horizontal direction, and the additional fixing portion and the mounting portion are integrally formed. In the present embodiment, the same components as those in the reference example described above are denoted by the same reference numerals, and the description thereof is omitted.

In the figure, reference numeral 41 denotes a support member disposed on the upper side of the hydraulic pump 13, and the support member 41 is used in the second embodiment instead of the support member 17 according to the reference example . Here, the support member 41 uses a fixing portion 41A formed in a U-shaped frame shape by the mounting portion 41A1 and the front and rear reinforcing members 41A2, and means such as welding on the upper end portion of the fixing portion 41A. The mounting portion 41B that is fixed and extends in the horizontal direction and the additional fixing portion 41C that is formed integrally with the mounting portion 41B in a state continuous from the end portion of the mounting portion 41B are configured as a single body. In addition, a plurality of fixed portion side bolt insertion holes 41A3 are formed in a circular arc on the lower end side of the mounting portion 41A1 of the fixed portion 41A. Further, a rectangular hole 41B1 is formed at the center of the mounting portion 41B, and mounting portion side bolt insertion holes 41B2 are formed at the four corners of the mounting portion 41B.

  On the other hand, the additional fixing portion 41C is fixed to the support member mounting portion 11 of the engine 8 at a position different from the fixing portion 41A, and a continuous plate portion 41C1 bent downward from the end portion of the mounting portion 41B; The mounting plate portion 41C2 is bent horizontally from the lower end of the continuous plate portion 41C1. In this case, the lower surface of the mounting plate portion 41C2 has a right-angled positional relationship with respect to the mounting portion 41A1 of the fixing portion 41A, and is a horizontal additional fixing surface 41C3 that faces the horizontal mounting surface 11A of the support member mounting portion 11. The mounting plate portion 41C2 is provided with a fixing bolt insertion hole 41C4 penetrating in the vertical direction.

  Then, as shown in FIG. 13, the fixing part 41 </ b> A of the support member 41 is fastened together with the flange part 14 of the hydraulic pump 13 using the fastening bolt 10, and the horizontal attachment surface 11 </ b> A of the support member attachment part 11 is additionally fixed. The horizontal additional fixing surface 41C3 of the portion 41C is brought into contact with the horizontal direction, and the fixing bolts 12 are screwed into the fixing bolt holes 11B of the supporting member mounting portion 11 through the fixing bolt insertion holes 41C4 of the additional fixing portion 41C. The additional fixing portion 41 </ b> C of the support member 41 is fixed to each support member attachment portion 11.

The excavator 1 according to the second embodiment has the support member 41 as described above, and even when the weight of the exhaust gas treatment device 18 is increased, the fixing portion 41A and the additional fixing portion 41C of the support member 41 The load can be shared and supported, and the mounting strength of the support member 41 can be sufficiently secured. Therefore, also in the present embodiment, it is possible to obtain the same effects as those of the reference example described above.

Moreover, in the second embodiment, the additional fixing portion 41C of the support member 41 and the mounting portion 41B are integrally formed, and therefore the additional fixing portion 41C can be provided without increasing the number of parts. Further, the manufacturing cost of the support member 41 can be reduced.

In the reference examples and the embodiments described above, the hydraulic excavator 1 including the crawler type lower traveling body 2 has been described as an example. However, the present invention is not limited to this, and may be configured to be mounted on a hydraulic excavator including a wheel-type lower traveling body made of, for example, a tire. Besides, it can be widely applied to other construction machines such as lift trucks and hydraulic cranes.

1 Hydraulic excavator 2 Lower traveling body (vehicle body)
3 Upper swing body (car body)
8 Engine 8E Output shaft 9 Pump mounting part 10 Fastening bolt (fastening member)
11, 31 Support member mounting portion 11A Horizontal mounting surface 13 Hydraulic pump 14 Flange portion 17, 33, 41 Support member 17A, 33A, 41A Fixing portion 17B, 33B, 41B Mounting portion 17C, 33C, 41C Additional fixing portion 17C3, 41C3 Horizontal additional fixing surface 18 Exhaust gas treatment device 31A Vertical mounting surface 33C1 Vertical additional fixing surface

Claims (2)

A self-propelled vehicle body, an engine mounted on the vehicle body and surrounding the output shaft at the end of the housing and having a pump mounting portion, and a flange portion that is attached to the pump mounting portion of the engine by a fastening member; Construction comprising a hydraulic pump driven to rotate by the engine, a support member disposed on the upper side of the hydraulic pump, and an exhaust gas processing device mounted on the support member for processing exhaust gas of the engine In the machine
The engine is provided with a support member mounting portion having a vertical mounting surface for mounting the support member at a position opposite to the hydraulic pump across the pump mounting portion.
The support member includes a fixing portion that is fixed by joint fastening using the fastening member in a state of being in contact with an end face of the flange portion of the hydraulic pump, and extends on the hydraulic pump from an upper end of the fixing portion. The mounting portion for mounting the exhaust gas treatment device, and an additional fixing portion fixed to the support member mounting portion at a position different from the fixing portion,
And the said supporting member comprises the said fixing | fixed part, a mounting part, and an additional fixing | fixed part as a single-piece | unit by welding and / or bending formation ,
The additional fixing portion of the support member is formed integrally with the mounting portion by bending from the end portion of the mounting portion so as to contact the vertical mounting surface of the supporting member mounting portion. Construction machine characterized by being configured to be fixed to the part . A self-propelled vehicle body, an engine mounted on the vehicle body and surrounding the output shaft at the end of the housing and having a pump mounting portion, and a flange portion that is attached to the pump mounting portion of the engine by a fastening member; Construction comprising a hydraulic pump driven to rotate by the engine, a support member disposed on the upper side of the hydraulic pump, and an exhaust gas processing device mounted on the support member for processing exhaust gas of the engine In the machine
The engine is provided with a support member mounting portion having a horizontal mounting surface for mounting the support member at a position opposite to the hydraulic pump across the pump mounting portion .
The support member includes a fixing portion that is fixed by joint fastening using the fastening member in a state of being in contact with an end face of the flange portion of the hydraulic pump, and extends on the hydraulic pump from an upper end of the fixing portion. The mounting portion for mounting the exhaust gas treatment device, and an additional fixing portion fixed to the support member mounting portion at a position different from the fixing portion,
And the said supporting member comprises the said fixing | fixed part, a mounting part, and an additional fixing | fixed part as a single-piece | unit by welding and / or bending formation ,
The additional fixing portion of the support member is formed integrally with the placement portion in a state of being continuous from the end portion of the placement portion toward the support member mounting portion, and is bent from the end portion of the placement portion. wherein a continuous plate section, that is configured to be closed and a mounting plate portion fixed to the horizontal mounting surface and said support member attachment portion bent so that contact between the support member mounting part from the continuous plate section And construction machinery.

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