JP2006257932A - Muffler installing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a muffler installing device for facilitating muffler installing work. <P>SOLUTION: This muffler installing device 41 has a lower bracket 43 for holding a lower part of a muffler 30, and an upper bracket 44 for holding an upper part of the muffler 30. The muffler installing device 41 has a bolt body 48 positioned so as to straddle the upper bracket 44 and the lower bracket 43, and a nut body 50 threadedly engaging with the bolt body 48. The muffler 30 is sandwiched by the upper bracket 44 and the lower bracket 43 by threadedly engaging with a screw part 47 of an upper end part of the bolt body 48 by rotatably operating the nut body 50 from an upper part of the muffler 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a muffler attachment device for attaching a muffler used in various work machines, traveling vehicles, and the like to a muffler attachment portion.

  Conventionally, for example, as shown in FIGS. 10 to 12, a muffler mounting portion in which a substantially cylindrical muffler 5 protrudes from the engine 4 at a position between the protection plate 3 and the engine 4 in the engine room 2 of the excavator 1. As the muffler attaching device 7 for attaching to the device 6, one using a U bolt 8 is known (see, for example, Patent Document 1). The protective plate 3 divides the engine room 2 and the pump room 9 and protects the hydraulic circuit pump 10 in the pump room 9 and its piping from high temperatures of the muffler 5 in the engine room 2.

  The muffler mounting device 7 is fitted to the muffler mounting portion 6 with a bolt 11 and a washer 12 to form a U-bolt insertion hole 13 and support the lower portion of the muffler 5 and the upper half of the muffler 5. The screw portion 15 on the lower end side is inserted into the U-bolt insertion hole 13, and the screw portion 15 is provided with a U-bolt 8 to which a pair of upper and lower nuts 16 and washers 17 are attached.

When the muffler 5 is attached to the muffler attaching portion 6 using the muffler attaching device 7, first, the bracket 14 is attached to the muffler attaching portion 6, and then the muffler 5 is placed on the bracket 14 in a horizontally placed state. . Next, the upper nut 16 is screwed into the threaded portion 15 of the U bolt 8 and the washer 17 is passed through. Then, the U bolt 8 is fitted to the upper half of the muffler 5, and the threaded portion 15 is inserted into the U bolt of the bracket 14. The lower nut 16 is screwed into the threaded portion 15 of the U bolt 8 through the washer 17 after that.
JP 2003-104071 A

  However, in the conventional muffler mounting device 7, the muffler 5 is disposed in a narrow space between the protective plate 3 and the engine 4 in a state close to the protective plate 3 and the engine 4. Insert a tool with nut 16 and washer 17 into the lower side of bracket 14 through a narrow gap between muffler 5 and protective plate 3 and between muffler 5 and engine 4 from above, and nut from the lower part of bracket 14 16 has to be rotated by hand and screwed into the threaded portion 15 of the U-bolt 8, which requires a great deal of labor for mounting the muffler 5.

  This invention is made | formed in view of such a point, and it aims at providing the muffler attachment apparatus which can aim at the simplification of the attachment operation | work of a muffler.

  The muffler attachment device according to claim 1 is a muffler attachment device for attaching the muffler to the muffler attachment portion, and is attached to the muffler attachment portion, and holds a first side bracket of the muffler, and the muffler An other side bracket for holding the other side, a bolt body positioned so as to straddle the one side bracket and the other side bracket, and a nut body screwed to the bolt body, on the other side of the muffler The nut body is screwed into the bolt body by rotating one of the nut body and the head of the bolt body located on the space section side of the other side bracket from the facing space section side. Thus, the one side bracket and the other side bracket sandwich the muffler.

  The muffler mounting device according to claim 2 is the muffler mounting device according to claim 1, wherein the one side bracket is a lower bracket that holds a lower portion of the muffler, and the other side bracket holds an upper portion of the muffler. An upper bracket that rotates the nut body from above the muffler so that the nut body is screwed into the upper end of the bolt body, whereby the upper bracket and the lower bracket are A muffler is sandwiched between them.

  The muffler mounting device according to claim 3 is a muffler mounting device for mounting the muffler to the muffler mounting portion, and is attached to the muffler mounting portion and holds one side of the muffler, and the one side bracket. A nut body provided on the bracket, an other side bracket for holding the other side of the muffler, and a bolt body positioned so as to straddle the one side bracket and the other side bracket, on the other side of the muffler The nut body is screwed into the bolt body by rotating the head of the bolt body located on the space section side of the other side bracket from the facing space side, so that the one side A bracket and the other side bracket sandwich the muffler.

  The muffler mounting device according to claim 4 is the muffler mounting device according to claim 3, wherein the one side bracket is a lower bracket that holds a lower portion of the muffler, and the other side bracket holds an upper portion of the muffler. The upper bracket and the lower bracket by rotating the head of the bolt body from the upper part of the muffler and screwing the nut body into the lower end of the bolt body. And sandwich the muffler.

  According to the first aspect of the present invention, the muffler can be held between the one side bracket and the other side bracket by a turning operation from the space portion side facing the other side of the muffler. It can be carried out easily in a short time.

  According to the second aspect of the present invention, the muffler can be clamped between the upper bracket and the lower bracket by the turning operation from the upper part of the muffler, so that the muffler can be simply attached in a short time while observing the attachment / detachment of the muffler. Can do.

  According to the invention of claim 3, since the muffler can be clamped between the one side bracket and the other side bracket by a turning operation from the space portion side facing the other side of the muffler, It can be carried out easily in a short time.

  According to the invention which concerns on Claim 4, since a muffler can be clamped with an upper bracket and a lower bracket by the rotation operation from the upper part of a muffler, it is simply performed in a short time, visually observing attachment / detachment of a muffler. Can do.

  An embodiment of the muffler mounting device of the present invention will be described with reference to FIGS.

  In FIG. 7, reference numeral 21 denotes a hydraulic excavator as a work machine. The hydraulic excavator 21 includes a crawler-type lower traveling body 22, and the upper traveling body 23 is centered on a rotating shaft in the vertical direction. It is provided so that turning is possible.

  A working body 24 for performing excavation work, a cab 25, and the like are provided at the front portion of the upper swing body 23. An engine room 26 is provided at the rear of the upper swing body 23, and an engine 27, a radiator 28, a muffler 30, a protective plate 31, and the like are accommodated in the engine room 26. The substantially cylindrical muffler 30 is disposed between the protective plate 31 and the engine 27 so as to be close to the protective plate 31 and the engine 27 in a horizontal state in which the axial direction coincides with the horizontal direction. The protection plate 31 partitions the engine room 26 and the pump room, and protects the hydraulic circuit pump in the pump room and its piping from the high temperature of the muffler 30 in the engine room 26.

  As shown in FIG. 6, the muffler 30 is a filter built-in type muffler such as a ceramic muffler that requires periodic replacement of the ceramic filter 33 between a pair of clamps 32. 1 and 2, the muffler 30 is fixedly attached to a muffler attaching portion 40 protruding from the engine 27 by a muffler attaching device 41.

  Here, the muffler mounting device 41 includes a plurality of, for example, two lower brackets 43 that are one-side brackets, that are attached to the muffler mounting portion 40 with bolts 42 that are mounting tools and hold a lower portion that is one side of the muffler 30; A plurality of, for example, two upper brackets 44 which are other side brackets are provided to hold the upper side which is the other side of the muffler 30.

  The muffler mounting device 41 has a hexagonal head 46 on the base end side, a threaded portion 47 on the tip end side, and a plurality of, for example, four, positioned so as to straddle the lower bracket 43 and the upper bracket 44. And a plurality of, for example, four hexagonal nut bodies 50 that are screwed into the threaded portion 47 of the bolt body 48.

  As shown in FIGS. 3 to 5, the lower bracket 43 has a substantially rectangular attachment plate portion 51 attached to the upper surface portion of the muffler attachment portion 40, and has a belt-like shape from one side edge portion of the attachment plate portion 51. The rising plate portion 52 rises at a right angle and protrudes to one side in the longitudinal direction of the mounting plate portion 51, and the holding plate portion 53 having the same length as the rising plate portion 52 extends from the leading edge of the rising plate portion 52. Projects at a right angle in the opposite direction to 51.

  On both ends in the longitudinal direction of the holding plate portion 53, notches (slots) 54 are formed in the width direction of the holding plate portion 53 from the front end edge portion to the vicinity of the base end edge portion on the rising plate portion 52 side. A curved portion 55 that holds the lower portion of the muffler 30 is formed on the central side in the longitudinal direction of the holding plate portion 53 with substantially the same curvature as the outer diameter of the muffler 30, and the curved portion 55 has a semi-elliptical cutout portion 56. Is formed.

  Further, on the side surface of the rising plate portion 52 of the holding plate portion 53, a pair of rotation restricting rib plate portions 58, which are rotation restricting portions, sandwich the respective notch portions 54 in parallel, and the holding plate portion 53 and the rising plate portion 52. It is fixed to and. The distance between the two rotation restricting rib plate portions 58 located on both sides of the notch portion 54 corresponds to the distance between the two opposing surfaces of the head portion 46 of the bolt body 48. When the muffler 30 is attached, the screw portion When the head 46 of the bolt body 48 in which the 47 is inserted into the notch portion 54 is accommodated between the rotation regulating rib plate portions 58, when the rotational torque is applied to the bolt body 48, a pair of rotations with the head 46 The contact with the regulating rib plate portion 58 prevents the bolt body 48 from rotating together. On the rising plate portion 52 side of the notch portion 54, a rib plate portion 58 parallel to the rotation restricting rib plate portion 58 is fixed to the holding plate portion 53 and the rising plate portion 52, and this rib plate portion 59 is When the nut body 50 is screwed onto the bolt body 48, the holding plate portion 53 is prevented from being bent and deformed by the tightening torque of the nut body 50 together with the rotation restricting rib plate portion 58. In addition, a rib plate portion 60 is provided between the mounting plate portion 51 and the rising plate portion 52 so as to be positioned at the approximate center in the longitudinal direction of the rising plate portion 52.

  On the other hand, the upper bracket 44 has a belt-like holding plate portion 61 that holds the upper portion of the muffler 30 as shown in FIGS. 1, 2, and 5. One side edge of the holding plate 61 is formed to have the same length as the holding plate 61, and the holding plate 61 is bent by the tightening torque of the nut 50 when the nut 50 is screwed to the bolt body 48. A rising rib plate portion 62 that prevents deformation is provided to project at a right angle to the holding plate portion 61.

  Flat plate portions 65 having bolt insertion holes 64 are formed on both ends of the holding plate 61 in the longitudinal direction. On the center side in the longitudinal direction of the holding plate portion 61, a curved portion 66 that fits with the upper portion of the muffler 30 is formed with a curvature that is substantially the same as the outer diameter of the muffler 30. When the nut body 50 is screwed to the bolt body 48, the lower surface of the flat plate portion 65 of the holding plate portion 61 of the upper bracket 44 is supported by the receiving nut body 70, and the tightening torque by the nut body 50 is kept constant. .

  Next, a case where the muffler 30 is attached to the muffler attachment portion 40 in a narrow space between the protection plate 31 and the engine 27 in the engine room 26 using the muffler attachment device 41 having the above configuration will be described.

  First, the attachment plate portion 51 of the lower bracket 43 is attached to the muffler attachment portion 40 with the bolts 42.

  Next, the muffler 30 is placed horizontally on the holding plate portion 53 of the lower bracket 43.

  Subsequently, the bolt body 48 is temporarily fixed to the upper bracket 44 with the nut body 50 and the receiving nut body 70.

  Next, as shown in FIG. 5, the base of the threaded portion 47 of the bolt body 48 is inserted into the cutout portion 54, and the head 46 of the bolt body 48 is inserted between the rotation restricting rib plate portions 58 to restrict the rotation. The rib plate portion 58 restricts the rotation of the bolt body 48 and the holding plate portion 61 of the upper bracket 44 is fitted to the upper portion of the muffler 30.

  Thereafter, the nut body 50 is turned from the space 71 side facing the other side of the muffler 30 using a tool, that is, from the upper part of the muffler 30 in this embodiment, and the rotation of the bolt body 48 is adjusted to the head. The muffler 30 is fixed to the upper bracket 44 and the lower bracket 43 by screwing the nut body 50 to the upper end portion of the threaded portion 47 of the bolt body 48 while preventing it from coming into contact with the rotation restricting rib plate portion 58. And hold it between. In other words, the nut body 50 is turned between the protection plate 31 and the engine 27 from the upper part of the muffler 30 disposed in the state of being close to the protection plate 31 and the engine 27, and the nut body 50 is moved to the upper end portion of the bolt body 48. The muffler 30 is sandwiched between the upper bracket 44 and the lower bracket 43 by being screwed into the threaded portion 47 of the second bracket. Thus, the mounting operation of the muffler 30 to the muffler mounting portion 40 by the muffler mounting device 41 is completed.

  Thus, according to the muffler mounting device 41, the main mounting work of the muffler 30 is performed on the space 71 side above the muffler 30, and the nut body 50 is operated from the upper portion of the muffler 30 and screwed into the bolt body 48. By doing so, the muffler 30 can be clamped between the upper bracket 44 and the lower bracket 43, so that the muffler can be easily attached in a short time while visually observing, and the bolt body 48 and the nut body 50 can be screwed together. In this case, a stable tightening torque can be easily set.

  Further, since the nut body 50 can be removed from the bolt body 48 by the turning operation from the upper part of the muffler 30, the replacement work of the ceramic filter 33 can be facilitated and the maintainability is also good.

  In the above embodiment, the nut body 50 is rotated from the upper part of the muffler 30 to rotate the nut body 50 with respect to the bolt body 48 whose rotation is restricted by the rotation restriction rib plate portion 58. Thus, the nut body 50 is screwed into the upper end portion of the bolt body 48, so that the upper bracket 44 and the lower bracket 43 sandwich the muffler 30. The nut body is screwed into the lower end of the bolt body by rotating the head of the bolt body and rotating the bolt body with respect to the nut body restricted by the rotation regulating rib plate portion. Thus, the upper bracket and the lower bracket may sandwich the muffler.

  Further, the muffler mounting device 41 supports the head 46 of the bolt body 48 from below and controls the rotation of the head 46 of the bolt body 48 as shown in another embodiment of FIG. The U-shaped bracket 68 that is a portion may be fixed to the rising plate portion 52 side of the holding plate portion 53 of the lower bracket 43 so as to surround the notch portion 54. In this case, since the bolt body 48 is previously attached (temporarily fixed) to the lower bracket 43 on the lower side of the muffler and the bolt body 48 is not temporarily fixed to the upper bracket 44, the mounting workability of the muffler 30 can be further improved. it can.

  For example, the muffler mounting device 41 can achieve the effects of being able to easily perform the mounting of the muffler in a short time while visually observing the mounting of the muffler, even in the configuration shown in still another embodiment of FIG. The muffler mounting device 41 shown in FIG. 9 has a bolt insertion hole 72 formed at both ends in the longitudinal direction of the holding plate 53 of the lower bracket 43, and a portion facing the bolt insertion hole 72 of the holding plate 53 A nut body 73 is fixed to the lower surface of the steel plate by welding or the like. Then, from the space 71 side facing the other side of the muffler 30, that is, from the upper part of the muffler 30, by turning the head 46 of the bolt body 48 located above the upper bracket 44, the nut body 73 is The muffler 30 is sandwiched between the upper bracket 44 and the lower bracket 43 by being screwed into the threaded portion 47 at the lower end of the bolt body 48.

  The configuration in which the nut body 73 is fixed to the lower bracket 43 is not limited, and a structure in which a screw hole portion that is a nut body is formed in the lower bracket 43 may be used.

  In any of the above embodiments, the number of lower brackets 43, upper brackets 44, etc. is arbitrary, and two lower brackets 43 are connected by a connecting plate 74 as shown by a two-dot chain line in FIG. And may be integrated.

  Furthermore, the present invention can also be applied to the case where the muffler 30 is disposed in a vertical position, and can also be applied to a muffler of a working machine other than the hydraulic excavator 21, a muffler of a traveling vehicle, or the like.

It is a side view which shows the attachment state of the muffler attached with the muffler attachment apparatus which concerns on one embodiment of this invention. It is another side view which shows the attachment state of a muffler same as the above. It is a top view of the lower bracket of a muffler attachment apparatus same as the above. It is a side view of the lower bracket of a muffler attachment apparatus same as the above. It is another side view of the lower bracket of a muffler attachment apparatus same as the above. It is a side view of a muffler same as the above. It is a perspective view of the hydraulic excavator provided with the muffler same as the above. It is a side view of the lower bracket of the muffler attachment apparatus which concerns on other embodiment of this invention. It is a side view which shows the attachment state of the muffler attached with the muffler attachment apparatus which concerns on other embodiment of this invention. It is a side view which shows the attachment state of the muffler attached with the conventional muffler attachment apparatus. It is another side view which shows the attachment state of a muffler same as the above. It is a perspective view of a muffler same as the above.

Explanation of symbols

27 engine
30 muffler
31 Guard plate
40 Muffler mounting part
41 Muffler mounting device
43 Lower bracket, one side bracket
44 Upper bracket as the other side bracket
48 bolt body
50 Nut body
71 Space
73 Nut body

Claims (4)

A muffler mounting device for mounting the muffler to the muffler mounting part,
One side bracket that is attached to the muffler mounting portion and holds one side of the muffler;
The other side bracket for holding the other side of the muffler;
A bolt body positioned so as to straddle the one side bracket and the other side bracket;
A nut body screwed into the bolt body,
From the space part side facing the other side of the muffler, by rotating the nut body located on the space part side of the other side bracket and the head of the bolt body, the nut body is The muffler mounting device, wherein the one side bracket and the other side bracket sandwich the muffler by being screwed into a bolt body. The one side bracket is a lower bracket that holds the lower part of the muffler,
The other side bracket is an upper bracket that holds an upper part of the muffler,
By rotating the nut body from above the muffler, the nut body is screwed into the upper end of the bolt body, so that the upper bracket and the lower bracket sandwich the muffler. The muffler mounting device according to claim 1, wherein A muffler mounting device for mounting the muffler to the muffler mounting part,
One side bracket that is attached to the muffler mounting portion and holds one side of the muffler;
A nut body provided on the one side bracket,
The other side bracket for holding the other side of the muffler;
A bolt body positioned so as to straddle the one side bracket and the other side bracket;
The nut body is screwed into the bolt body by rotating the head of the bolt body located on the space side of the other side bracket from the space side facing the other side of the muffler. Accordingly, the muffler mounting device is characterized in that the one side bracket and the other side bracket sandwich the muffler. The one side bracket is a lower bracket that holds the lower part of the muffler,
The other side bracket is an upper bracket that holds an upper part of the muffler,
By rotating the head of the bolt body from above the muffler, the nut body is screwed into the lower end of the bolt body, so that the upper bracket and the lower bracket sandwich the muffler. The muffler mounting device according to claim 3.

Images