JP5063618B2 - Construction machine muffler water drainage equipment - Google Patents

Description

  The present invention relates to a drainage device for a muffler of a construction machine that guides rainwater that has entered the muffler through an outlet pipe or water condensed in the muffler from the lower part of the muffler to the outside of the construction machine by a drain pipe.

  Conventionally, a drain pipe is attached to the lower part of the muffler of the prime mover. (See Patent Document 1).

Japanese Utility Model Publication No. 6-4318

  By the way, in a machine room of a construction machine such as a hydraulic excavator, a firewall is provided that partitions a prime mover side space where a prime mover and a muffler are located and a discharge port side space where a discharge port of a hydraulic pump is located. The purpose of this firewall is to prevent the hydraulic oil scattered in the direction of the prime mover or muffler from reaching the high temperature part of the prime mover or muffler when the hydraulic hose connected to the discharge port of the hydraulic pump bursts. It is provided for the purpose of preventing the fired hydraulic oil from adhering to the high temperature part and igniting.

  In a hydraulic excavator, the position of the muffler is often set at a position that is higher than the prime mover and protrudes outward from the installation space of the prime mover. The firewall corresponding to the position of the muffler includes an upper vertical plate portion that vertically partitions the prime mover side space and the discharge port side space in the upper part of the machine room, and the prime mover side space and the discharge port side space in the lower part of the machine room. And a horizontal plate portion connecting the lower end of the upper vertical plate portion and the upper end of the lower vertical plate portion below the muffler.

  Conventionally, the drain pipe is attached to the lower part of the muffler as described above. The drain pipe is required to have heat resistance with respect to the temperature around the prime mover, and is preferably inexpensive. Drain piping that satisfies both heat resistance and low cost has the disadvantage of poor elasticity.

  The drain pipe is attached to the lower part of the muffler. When installing the drain pipe to the lower part of the muffler, first insert the upper end of the drain pipe into the opening that penetrates the horizontal plate of the firewall, and then connect the upper end of the drain pipe between the muffler and the horizontal plate. In a narrow space, it is attached to the lower part of the muffler by searching, and finally a gap formed between the edge of the opening of the horizontal plate portion and the drain pipe is attached to the horizontal plate portion to cover it. Equipment other than the engine and hydraulic pump is also arranged around the firewall, which is narrow and restricts the movement of workers, so it is very difficult to install drain piping. For this reason, if a drain pipe having poor elasticity is used, the drain pipe is easily bent during installation work, and the drain pipe is easily damaged.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a muffler draining device for a construction machine that can facilitate the operation of attaching a drain pipe.

  The present invention is configured as follows to achieve the above-described object.

The present invention includes a prime mover side space of the machine room of the construction machine engine and the muffler is positioned, e Bei the discharge port side space and the partition any firewall which the discharge port of the hydraulic pump is located, the firewall of the machine room An upper vertical plate portion that partitions the prime mover side space and the discharge port side space at an upper portion; a lower vertical plate portion that partitions the prime mover side space and the discharge port side space at a lower portion of the machine room; and It consists of a horizontal plate portion that is located below and connects the upper vertical plate portion and the lower vertical plate portion and has a through hole,
The lower part of the muffler has a tubular projecting part that protrudes downward and has an opening whose projecting end is open, and guides the water in the muffler to the outside,
The muffler is provided in a state where the tubular projecting portion penetrates the through hole of the horizontal plate portion and projects into the discharge port side space,
A drain pipe that is inserted into the tubular projecting portion projecting from the lateral plate portion into the discharge port side space and guides water discharged from the opening to the outside of the construction machine is attached to the lateral plate portion. It is characterized in that it is attached by attaching it to the surface on the discharge side space side with a bolt .

According to the thus configured present invention, the drain pipe is than the mounting allowance is mounted by being attached by bolts to the surface of the discharge port side space side of the horizontal plate portion, the horizontal plate portion of drain pipe It is not necessary to insert the drain pipe into the lower part of the muffler by searching in the narrow space between the horizontal plate part and the muffler. Thereby, it is possible to facilitate the work of attaching the drain pipe.

Further , according to the present invention, since the drain pipe is attached to the surface on the discharge port side space side of the horizontal plate portion, that is, not directly connected to the muffler, the influence of heat on the drain pipe is reduced. Can be small.

Further, according to the present invention, the tubular projecting portion projecting from the through hole of the transverse plate portion on the discharge port side space, because it is inserted into the drain pipe, the water flowing down from the tip of the opening of the tubular projection reliably Can be led into the drain pipe.

Moreover, according to this invention, a muffler and drain piping can be located away. That is, it is not necessary to have a joint between the muffler and the drain pipe. Therefore, it is possible to prevent damage to the connecting portion between the muffler and the drain pipe due to the vibration of the muffler.

  According to the present invention, as described above, the drain pipe can be easily attached. Therefore, it is possible to reduce the labor of the operator required for the installation work of the drain pipe and to reduce the frequency of damaging the drain pipe during the installation.

It is a left side view showing a hydraulic excavator is a construction machine according to the implementation embodiments of the present invention. It is a rear view of the drainage device according to the implementation embodiments of the present invention. It is a right view of the water draining apparatus shown to FIGS. It is a rear view of the water draining apparatus which concerns on the reference example of this invention. It is a right view of the water draining apparatus shown to FIGS. 3-1.

Figure 1 is a left side view showing a hydraulic excavator is a construction machine according to the implementation embodiments of the present invention. Figure 2-1 is a rear view of the drainage device according to the implementation embodiments of the present invention. FIG. 2-2 is a right side view of the water draining apparatus shown in FIG. 2-1.

  As shown in FIG. 1, a hydraulic excavator 1 includes a traveling body 2 that travels by driving a crawler belt 2 a, a revolving body 3 that is turnable on the traveling body 2, and a front portion of the revolving body 3. And a front working device 4 provided in the center.

  The revolving unit 3 includes a driver's cab 3a provided on the left side of the front working device 4 at the front of the revolving unit 3, a counterweight 3b that forms the rear end of the revolving unit 3, the front working device 4 and the driving unit. The machine room 3c provided in the range between the front part of the hydraulic excavator 1 in which the chamber 3a is located, and the counterweight 3b is provided.

  As shown in FIGS. 2-1 and 2-2, in the machine room 3c, a prime mover 10 and a hydraulic pump 11 that is driven by transmitting the power of the prime mover 10 are installed. The prime mover 10 and the hydraulic pump 11 are integrated by connecting the casings with each other. The position of the muffler 12 is set to a position that is higher than the prime mover 10 and protrudes to the right, which is outside the installation space of the prime mover 10. The muffler 12 is fixed to the prime mover 10 via a bracket 13.

  Above the prime mover 10 and the hydraulic pump 11, a cover member 3c1 that forms a part of the upper surface of the machine room 3c is located. An outlet pipe 14 is provided above the muffler 12 so as to protrude upward. The outlet pipe 14 passes through the cover member 3c1 and is positioned so as to protrude above the machine chamber 3c.

  A prime mover side space S1 where the prime mover 10 and the muffler 12 are located and a discharge port side space S2 where the discharge port of the hydraulic pump 11 is located are partitioned by a firewall 15. The firewall 15 includes an upper vertical plate portion 15a that partitions the prime mover side space S1 and the discharge port side space S2 in the left and right direction in the upper part in the machine room 3c, and a prime mover side space S1 and the discharge port side in the lower part in the machine room 3c. A lower vertical plate portion 15b that partitions the space S2 in the left-right direction, and a horizontal plate portion 15c that connects the lower end of the upper vertical plate portion 15a and the upper end of the lower vertical plate portion 15b below the muffler 12. . The hydraulic pump 11 is positioned through the lower vertical plate portion 15b. The right side of the horizontal plate portion 15c is inclined obliquely upward to the right.

  The muffler 12 has a shape in which both ends of a cylinder extending in the front-rear direction of the excavator 1 are closed. At the lower part of the cylindrical part of the muffler 12, a tubular projecting part 21 is provided which projects downward and penetrates the horizontal plate part 15c. The opening at the protruding end of the tubular projecting portion 21 is a drainage port that guides rainwater that has entered the muffler 12 through the outlet pipe 14 and water condensed in the muffler 12 to the outside of the muffler 12. A drain pipe 22 is attached to a portion of the horizontal plate portion 15c on the discharge port side space S2 side. The drain pipe 22 includes a first pipe 23 and a second pipe 24.

  The first pipe 23 is integrally formed with a steel pipe main body 23a that is curved and positioned away from the hydraulic pump 11, and a flat mounting margin 23b provided at the outer edge of the upper end of the pipe main body 23a. It is a thing. Two female screw portions (not shown) are formed in the horizontal plate portion 15c. Through holes (not shown) through which the bolts 23c and 23d are respectively inserted are formed at the positions of the mounting allowances 23b corresponding to these two female screw portions. That is, the mounting allowance 23b is screwed to the horizontal plate portion 15c by two female screw portions of the two bolts 23c and 23d and the horizontal plate portion 15c, whereby the first pipe 23 is connected to the discharge plate side space S2 side of the horizontal plate portion 15c. It is attached to the surface. In a state where the first pipe 23 is attached to the horizontal plate portion 15c, the tubular projecting portion 21 is inserted into the upper end of the tube main body 23a.

  The floor surface of the machine room 3c is formed by an under cover 3c2. The second pipe 24 is positioned through the under cover 3c2 with the lower end of the pipe body 23a of the first pipe 23 being inserted. A fastener (not shown) is attached to the outer peripheral surface of the portion of the second pipe 24 into which the pipe main body 23a is inserted, whereby the second pipe 24 is prevented from coming off from the first pipe 23. Yes.

  The drainage device 20 configured in this manner allows the drain that flows down from the drain outlet at the protruding end of the tubular protruding portion 21 to the underside that is outside the excavator 1 through the pipe body 23 a and the second piping 24 of the first piping 23. A drain passage leading to the lower side of the cover 3c2 is formed.

  The water draining device 20 is assembled in the following procedure.

  First, the hydraulic pump 11 and the muffler 12 are attached to the prime mover 10. Next, the prime mover 10 is installed in the machine room 3c. Next, a firewall 15 is provided in the machine room 3c. At this time, the tubular protruding portion 21 is inserted into a through hole (not shown) formed in the horizontal plate portion 15c of the firewall 15 and protrudes into the discharge port side space S2.

  Next, in the discharge port side space S2, the mounting allowance 23b of the first pipe 23 is lateral so that the portion of the tubular protruding portion 21 protruding from the horizontal plate portion 15c to the discharge port side space S2 is inserted into the tube body 23a. It arrange | positions at the surface at the side of the discharge outlet side space S2 of the board part 15c, and the attachment allowance 23b is screwed to the horizontal board part 15c. And the 2nd piping 24 is arrange | positioned in the lower end part of the pipe main body 23a of the 1st piping 23, and it removes with a fastener, and the draining apparatus 20 is completed.

  According to the water draining device 20, the following effects can be obtained.

  According to the drainage device 20, since the first pipe 23 of the drain pipe 22 is attached to the portion of the horizontal plate portion 15c on the discharge port side space S2 side, the drain pipe is provided in the opening that penetrates the horizontal plate portion 15c. It is not necessary to insert the drain pipe 22 or to attach the drain pipe 22 to the lower part of the muffler 12 by searching in a narrow space between the horizontal plate portion 15 c and the muffler 12. As a result, it is possible to facilitate the work of installing the drain pipe, and therefore it is possible to reduce the labor of the operator required for the work of installing the drain pipe, and to reduce the frequency of damaging the drain pipe during installation. .

  According to the water draining device 20, the portion of the tubular projecting portion 21 projecting from the horizontal plate portion 15 c to the discharge port side space S <b> 2, that is, the projecting end of the tubular projecting portion 21 including the drain port, becomes the first piping 23 of the drain piping 22. Since it is inserted, the drain flowing down from the drain port can be reliably guided into the drain pipe 22.

  According to the water draining device 20, the muffler 12 and the drain pipe 22 can be positioned apart. That is, it is not necessary to have a coupling portion between the muffler 12 and the drain pipe 22. Therefore, it is possible to prevent damage to the connecting portion between the muffler 12 and the pipe due to the vibration of the muffler 12.

  According to the water draining device 20, since the drain pipe 22 is attached to a portion on the discharge port space S2 side of the horizontal plate portion 15c, that is, is not directly connected to the muffler 12, the drain pipe 22 The influence of heat can be reduced.

In the above-described embodiment, the drain pipe 22 is composed of two pipes (first and second pipes 23 and 24). However, the drain pipe in the present invention is not limited thereto, and one drain pipe is used. You may be comprised from these piping.

FIG. 3-1 is a rear view of a water draining apparatus according to a reference example of the present invention. 3-2 is a right side view of the water draining apparatus shown in FIG. 3-1. 3-1 and 3-2, the same reference numerals as those in FIGS. 2-1 and 2-2 are used for those equivalent to those shown in FIGS. did.

In the water draining device 30 according to the reference example , the drain port of the muffler 12 includes a hole (not shown) penetrating the lower part of the cylindrical portion of the muffler 12.

  Further, the horizontal plate portion 15c of the firewall 15 is a plate portion that extends in a substantially horizontal direction in a state in which the revolving structure 3 is in a substantially horizontal posture. The horizontal plate portion 15c is provided with a tray portion 31 that is located below the drain port of the muffler 12 and that is wider than the drain port. The tray portion 31 has a shape that tapers downward. In this tray part 31, the approximate center is the deepest part. A tubular projecting portion 32 is formed so as to project downward from the deepest portion, that is, into the discharge port side space S2. The saucer portion 31 and the tubular projecting portion 32 are formed integrally with the horizontal plate portion 15c and form a funnel shape as a whole.

  A drain pipe 33 is connected to the tubular projecting portion 32. The drain pipe 33 is composed of a single pipe that is curved and is located away from the hydraulic pump 11. A tubular projecting portion 32 is inserted into the upper end portion of the drain pipe 33. On the outer peripheral surface of the upper end portion, a fastening tool (not shown) is attached, and thereby the drain pipe 33 is prevented from coming off from the tubular projecting portion 32.

  The drainage device 30 configured in this way allows the drain flowing down from the drain port of the muffler 12 to pass under the under cover 3c2 which is the outside of the excavator 1 through the tray part 31, the tubular projecting part 32 and the drain pipe 33. A drain passage is formed for guiding.

  The water draining device 30 is assembled in the following procedure.

  First, the hydraulic pump 11 and the muffler 12 are attached to the prime mover 10. Next, the prime mover 10 is installed in the machine room 3c. Next, a firewall 15 is provided in the machine room 3c. At this time, the tray portion 31 is positioned below the drain port of the muffler 12.

  Next, in the discharge port side space S2, a state in which the tubular projecting portion 32 is inserted into the upper end portion of the drain pipe 33, and the lower end portion of the drain pipe 33 projects downward from the under cover 3c2. The drain pipe 33 is arranged so as to be. In this state, a fastening tool is attached to the outer peripheral surface of the upper end portion of the drain pipe 33, the drain pipe 33 is prevented from coming off from the tubular projecting portion 32, and the water draining device 30 is completed.

  According to the water draining device 30, the following effects can be obtained.

  According to the water draining device 30, since the drain pipe 33 is attached to the tubular projecting portion 32 that is the portion on the discharge port side space S2 side of the horizontal plate portion 15c, the drain is inserted into the opening that penetrates the horizontal plate portion 15c. There is no need to insert the pipe 33 or attach the drain pipe 33 to the lower part of the muffler 12 by searching in a narrow space between the horizontal plate portion 15 c and the muffler 12. As a result, it is possible to facilitate the work of installing the drain pipe, and therefore it is possible to reduce the labor of the operator required for the work of installing the drain pipe, and to reduce the frequency of damaging the drain pipe during installation. .

  According to the water draining device 30, since the tray part 31 extends over a wider area than the drain outlet, the water falling from the drain outlet can be reliably guided into the drain pipe 33.

  According to the water draining device 30, the muffler 12 and the drain pipe 33 can be positioned apart from each other. That is, it is not necessary to have a joint between the muffler 12 and the drain pipe 33. Therefore, it is possible to prevent damage to the connecting portion between the muffler 12 and the pipe due to the vibration of the muffler 12.

  According to the drainage device 30, since the drain pipe 33 is attached to the portion of the horizontal plate portion 15c on the discharge port space S2 side, that is, not directly connected to the muffler 12, the drain pipe 33 is connected to the drain pipe 33. The influence of heat can be reduced.

  According to the drainage device 30, since it is not necessary to arrange the drain outlet of the muffler 12 in the drain pipe 33, the overall dimensions and assembly accuracy of the drainage device 30 can be made lower than in the first embodiment.

In the above-described reference example , the drain pipe 33 is composed of one pipe. However, the drain pipe in the present invention is not limited thereto, and two or more pipes are used as in the first embodiment. It may be comprised.

1 Excavator (construction machine)
2 traveling body 2a crawler belt 3 revolving body 3a cab 3b counterweight 3c machine room 3c1 cover member 3c2 under cover 4 front working device 10 prime mover 11 hydraulic pump 12 muffler 13 bracket 14 outlet pipe 15 firewall 15a upper vertical plate portion 15b lower vertical Plate portion 15c Horizontal plate portion 20 Drainage device 21 Tubular protrusion 22 Drain pipe 23 First pipe 23a Pipe body 23b Mounting allowance 23c, 23d Bolt 24 Second pipe S1 Motor side space S2 Discharge port side space

30 Drainage device 31 Dish portion 32 Tubular protrusion 33 Drain piping

Claims (1)

A prime mover side space of the machine room of the construction machine engine and the muffler is positioned, Bei give a partition any firewall on the discharge port side space discharge port of the hydraulic pump is located,
The firewall includes an upper vertical plate that partitions the prime mover side space and the discharge port side space at the upper part of the machine room, and a lower side that partitions the prime mover side space and the discharge port side space at the lower part of the machine room. It consists of a vertical plate part and a horizontal plate part that is located below the muffler and connects the upper vertical plate part and the lower vertical plate part and has a through hole,
The lower part of the muffler has a tubular projecting part that protrudes downward and has an opening whose projecting end is open, and guides the water in the muffler to the outside,
The muffler is provided in a state where the tubular projecting portion penetrates the through hole of the horizontal plate portion and projects into the discharge port side space,
A drain pipe that is inserted into the tubular projecting portion projecting from the lateral plate portion into the discharge port side space and guides water discharged from the opening to the outside of the construction machine is attached to the lateral plate portion. A muffler draining device for a construction machine, which is attached to a surface on the discharge side space side by a bolt .

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