JP2010106582A - Bracket-and-flange integrated type engine assembly component of construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of part items and cost, and to enhance assemblability, by integrating a muffler bracket and a pump flange. <P>SOLUTION: In this construction machinery, a hydraulic pump 16 is connected to an engine 10 side face via a bell flange 18, a muffler 11 installed in an upper side of the bell flange 18 is supported by the muffler bracket 19, and the muffler bracket 19 and the bell flange 18 are formed into integrated structure as one assembly component 20. The integrated component 20 therein is manufactured by a casting, and is fastened and fixed on the engine 10 side face removably by a bolt 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bracket / flange integrated engine assembly part of a construction machine, and in particular, a bracket of a construction machine in which a hydraulic pump is connected to the engine via a pump flange, and the muffler is supported by the muffler bracket.・ It relates to flange-integrated engine assembly parts.

  Conventionally, a construction machine such as this type of hydraulic excavator has an upper swing body mounted on a lower traveling body so that the upper swing body can pivot, and a boom, an arm, a bracket, and the like are attached to a front center portion of the upper swing body so as to be movable up and down. Yes.

  A cab is provided on one front side of the upper swing body, and devices such as an engine, a muffler, and a hydraulic pump are mounted on the rear portion of the upper swing body. As shown in FIG. 4, the engine 41 is supported by an engine support 42, and a pump flange (bell flange) 43 is provided on the side of the engine 41.

As shown in FIG. 5, a hydraulic pump 44 is connected to the side of the engine 41 via a pump flange 43. Further, a substantially cylindrical muffler 45 is installed above the pump flange 43, and the muffler 45 is connected to the exhaust port of the engine 41. The muffler 45 is fixed on a steel muffler bracket 46, and the muffler bracket 46 is disposed above the side surface of the engine 41 (above the hydraulic pump 44). Reference numerals 47 and 48 in FIG. 5 are bolts that fasten and fix the pump flange 43 and the muffler bracket 46 to the side of the engine 10 (see, for example, Patent Document 1).
JP 2004-137484 A

  In the above-described conventional structure, since the two parts of the muffler bracket and the pump flange are separately assembled on the side of the engine at the time of assembly, the number of parts increases, the cost increases, and the assembly of the parts decreases.

  In addition, since intense vibration is generated in the vicinity of the engine, the muffler bracket may be broken. Furthermore, since the muffler bracket is manufactured by welding steel plates, there is a problem that the manufacturing efficiency is lowered.

  Therefore, there is a technical problem to be solved in order to reduce the number of parts and reduce the cost by integrating the muffler bracket and the pump flange, and to improve the assembling property or the manufacturing efficiency. Aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is a muffler in which a hydraulic pump is connected to a side surface of an engine via a pump flange, and is arranged above the side surface of the engine. Is a bracket / flange integrated engine assembly part of a construction machine supported by a muffler bracket, wherein the muffler bracket and the pump flange are integrally formed, and the integrated part is mounted on the engine side surface. Provided is a bracket / flange integrated engine assembly part for a construction machine configured to be assembled.

  According to this configuration, the muffler bracket and the pump flange, which are formed separately from each other in the conventional structure, are integrated into one component. The integrated parts are fastened and assembled to the engine side surface with bolts or the like.

  According to a second aspect of the present invention, there is provided a bracket / flange integrated engine assembly part for a construction machine according to the first aspect, wherein the integrated part is formed of a casting.

  According to this configuration, since the muffler bracket and the pump flange are manufactured as an integrated part by casting, the integrated part has high vibration damping performance. Therefore, even if intense vibration occurs in the vicinity of the engine, the vibration transmitted to the integrated component is effectively damped.

  According to the first aspect of the present invention, the muffler bracket and the pump flange are integrated into one part, so that the number of parts can be reduced, the manufacturing cost can be reduced, and the structure can be simplified. Further, in the conventional structure, the muffler bracket and the pump flange are separately assembled. However, in the present invention, the assembly is remarkably improved because the parts are assembled at the same time.

  In the invention according to claim 2, in addition to the effect of the invention according to claim 1, in addition to the effect of the invention according to claim 1, it is difficult to transmit the vibration to the integrated part (cast product) even when severe vibration is generated in the vicinity of the engine. Unlike the components consisting of the above, it is possible to effectively prevent problems such as cracks in the muffler bracket caused by engine vibration.

  Furthermore, since the casting-made integrated part does not require a welding process at the time of manufacture, it has an advantage of improving manufacturing efficiency.

  The present invention integrates a muffler bracket and a pump flange to reduce the number of parts and reduce the cost, and to achieve the purpose of improving the assembly and manufacturing efficiency. A hydraulic pump is connected to the side of the engine, and a muffler disposed above the side of the engine is supported by the muffler bracket, which is a bracket / flange integrated engine assembly part of a construction machine, the muffler bracket and the pump This was realized by integrally forming the flange and allowing the integrated part to be assembled to the engine side surface.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the muffler bracket and the bell flange (connecting parts for the hydraulic pump) are integrated into one part using cast iron, but can be integrated into one part using a metal material other than cast iron.

  FIG. 1 is a side view showing a hydraulic excavator as a construction machine according to the present embodiment. As shown in the figure, an upper swing body 4 is turnably mounted on the lower traveling body 2 via a swing mechanism 3, and a boom 5 is provided at the front center portion of the upper swing body 4 so as to be able to move up and down. It has been.

  An arm 6 is pivotally attached to the tip of the boom 5 so as to be rotatable up and down, and a bucket 7 is attached to the tip of the arm 6 so as to be rotatable up and down. Further, a cabin 8 is mounted on one front side of the upper swing body 4.

FIG. 2 is a plan view of the upper swing body 4, but shows a state in which the work attachment such as the boom 5 is removed for convenience of explanation. As shown in the figure, at the rear of the upper swing body 4 is an engine 10, a substantially cylindrical muffler 11 connected to the exhaust line of the engine 10, and a pump chamber 12 installed on the right side of the muffler 11. Is installed.

  The muffler 11 is horizontally installed in a direction orthogonal to the engine 10 (vehicle longitudinal direction), and the muffler 11 has a built-in DPF (Diesel Particulate Filter) capable of complying with the exhaust gas quaternary regulation. Furthermore, the hydraulic pump 16 shown in FIG. 3 is accommodated in the pump chamber 12, and the hydraulic pump 16 is connected to the output shaft side of the engine 10.

  A turning mechanism 3 is provided in front of the engine 10, and a fuel tank 13 is installed on the right side of the turning mechanism 3. Further, a hydraulic oil tank 14 is provided between the fuel tank 13 and the pump chamber 12. These hydraulic oil tank 14, fuel tank 13, pump chamber 12, engine 10 and the like are covered and protected by a house cover 15.

  FIG. 3 shows an assembly part provided on the pump chamber 12 side of the engine 10, an integrated engine assembly part (hereinafter referred to as “integrated part 20”) of the bell flange 18 and the muffler bracket 19.

  The bell flange 18 constituting the lower side of the integrated component 20 is provided at the center of the side surface of the engine 10 and is formed in a dome shape having a center hole. The hydraulic pump 16 is connected to the side surface of the engine 10 through the bell flange 18.

  Further, the muffler bracket 19 constituting the upper side of the integrated part 20 is composed of a horizontal portion for fixing the muffler and a vertical portion fixed to the lower surface of the horizontal portion. The rear surface of the vertical portion of the muffler bracket 19 is in contact with the side surface of the engine 10.

  Further, the horizontal portion of the muffler bracket 19 is located slightly above the upper surface of the engine 10, and the muffler 11 is fastened and fixed to the horizontal portion via a fixture (not shown) such as a U-bolt. Has been.

  The bell flange 18 and the muffler bracket 19 are manufactured as separate parts in the conventional example, but are manufactured as one assembled part in the present invention.

  That is, the outer peripheral upper part of the bell flange 18 is connected to the lower vertical part of the muffler bracket 19. Therefore, since the bell flange 18 and the muffler bracket 19 which are separate bodies in the prior art are integrated, the structure is simplified.

  In the present embodiment, the entire integrated component 20 is made of a casting (cast iron), and thus has high vibration damping performance. Further, an appropriate number of bolt through holes (not shown) (10 in the illustrated example) are formed on the outer periphery of the bell flange 18, and the integrated component 20 is connected to the engine by bolts 21 passing through the holes. It is fastened and fixed to 10 side surfaces so as to be detachable.

  As described above, according to the present invention, since the bell flange 18 and the muffler bracket 19 which are separate parts in the conventional structure are formed as one integrated part 20 as described above, the structure is simplified and the number of parts is reduced. In addition, production costs can be significantly reduced.

  Further, by fastening and fixing the integrated component 20 to the side surface of the engine 10 with bolts 21, unlike the conventional structure, the bell flange 18 and the muffler bracket 19 are assembled at the same time. Therefore, the assembling property is remarkably improved as compared with the prior art, and the working efficiency at the time of assembly is greatly improved.

Furthermore, since the integrated component 20 is made of cast iron, it has high vibration damping performance. Therefore, even when intense vibration occurs in the vicinity of the engine 10, the vibration transmitted to the integrated component 20 (the bell flange 18 and the muffler bracket 19) is effectively damped. Thus, problems such as cracks in the muffler bracket 19 caused by engine vibration can be efficiently prevented.

  Furthermore, since the integrated part 20 made of cast iron does not require a welding operation at the time of manufacture, the manufacturability of the bell flange 18 and the muffler bracket 19 is remarkably improved. In particular, the muffler bracket 19 made of cast iron has a support strength that can sufficiently cope with the muffler 11 having a large weight, so that even the large muffler 11 with a built-in DPF can be stably supported and fixed.

  In FIG. 3, the horizontal portion of the muffler bracket 19 is formed in a downwardly bent shape. However, the present invention should not be limited to this, and the shape of the muffler bracket 19 can be arbitrarily determined according to design matters and the like. Can be set.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified one.

1 is a side view of a hydraulic excavator as a construction machine according to an embodiment of the present invention. The top view explaining arrangement | positioning of the apparatuses in the upper turning body which concerns on one Example. The perspective view which shows the integrated engine assembly | attachment components which concern on one Example. The perspective view which shows the engine and engine assembly component which concern on a prior art example. The perspective view which shows the muffler bracket and bell flange (two assembly components) which concern on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 4 Upper turning body 10 Engine 11 Muffler 16 Hydraulic pump 18 Bell flange 19 Muffler bracket 20 Integrated component 21 Bolt

Claims (2)

  An engine assembly part integrated with a bracket and a flange of a construction machine, in which a hydraulic pump is connected to an engine side via a pump flange, and a muffler disposed above the engine side is supported by the muffler bracket. And the pump flange, and the integrated parts can be assembled to the side of the engine. 2. The bracket / flange integrated engine assembly part for a construction machine according to claim 1, wherein the integrated part is formed of a casting.

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