WO2013145385A1 - Machine de terrassement - Google Patents

Machine de terrassement Download PDF

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Publication number
WO2013145385A1
WO2013145385A1 PCT/JP2012/075659 JP2012075659W WO2013145385A1 WO 2013145385 A1 WO2013145385 A1 WO 2013145385A1 JP 2012075659 W JP2012075659 W JP 2012075659W WO 2013145385 A1 WO2013145385 A1 WO 2013145385A1
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WO
WIPO (PCT)
Prior art keywords
exhaust pipe
exhaust
seat
cover
exhaust gas
Prior art date
Application number
PCT/JP2012/075659
Other languages
English (en)
Japanese (ja)
Inventor
おさむ 國領
哲也 角野
入野　照男
川本　純也
Original Assignee
日立建機株式会社
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Filing date
Publication date
Application filed by 日立建機株式会社 filed Critical 日立建機株式会社
Publication of WO2013145385A1 publication Critical patent/WO2013145385A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E02F3/325—Backhoes of the miniature type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment

Definitions

  • the present invention relates to a working machine such as a mini-excavator having a canopy and an exhaust pipe having an exhaust port for releasing an exhaust gas of an engine at a position above a revolving structure.
  • Patent Document 1 discloses a working machine such as a mini-excavator having a canopy and an exhaust pipe having an exhaust port for releasing exhaust gas of the engine at a position above the revolving structure.
  • an exhaust pipe is provided such that the exhaust port is located above the roof of the canopy.
  • Patent No. 3987895 gazette
  • the building since the exhaust pipe protrudes from the roof of the canopy, the building may be subjected to height restrictions when carrying the mini-excavator on the trailer for transportation, etc., or to perform work in the building.
  • the exhaust pipe When entering from the entrance of the building, there is a risk that the exhaust pipe will hit the upper part of the entrance and it will not be possible to enter the building.
  • the present invention has been made from the situation in the above-mentioned prior art, and its object is to reduce the flow of exhaust gas discharged from the exhaust port of the exhaust pipe toward the driver's seat and to carry the working machine.
  • An object of the present invention is to provide a working machine capable of relieving restrictions due to an exhaust pipe at the time of working in a building or in a building.
  • the present invention is provided on a revolving unit, a working device attached to the revolving unit, a driver's seat disposed on the revolving unit, and the revolving unit, and covers the upper part of the driver's seat
  • a canopy having a roof, a muffler disposed on the revolving structure, to which exhaust gas of the engine is introduced, and an exhaust pipe having an exhaust port for discharging exhaust gas discharged from the muffler at a position above the counterweight
  • the height dimension of the exhaust pipe is set to a height dimension at which the exhaust port is disposed between the top and the bottom of the roof of the canopy.
  • the exhaust gas discharged from the exhaust port of the exhaust pipe is blocked by the portion located between the top and the bottom of the roof of the canopy when the revolving structure is turned or the like. Inflow to the seat direction can be reduced.
  • the temperature of the exhaust gas discharged from the exhaust port of the exhaust pipe becomes high, but as described above, the inflow of exhaust gas to the driver's seat decreases, so the present invention It is suitable also as a working machine provided with such an exhaust gas treatment device.
  • the exhaust pipe can be prevented from protruding from the roof of the canopy, it is possible to relieve the restriction due to the height restriction received when carrying the work machine on the trailer for transportation.
  • the present invention also enables the exhaust pipe to enter the building without hitting the top of the entrance when trying to enter from the entrance of the building to perform in-building work. That is, the present invention can alleviate the restriction due to the exhaust pipe at the time of transportation of the work machine or at the time of work in the building.
  • the present invention is characterized in that, in the above-mentioned invention, the exhaust pipe is disposed such that the direction of the exhaust port is the rear or the side.
  • the exhaust gas discharge direction is the direction opposite to the driver's seat or the direction along the portion between the top and bottom of the roof of the canopy, ie, the direction different from the driver's seat direction Therefore, the inflow of the emitted exhaust gas toward the driver's seat can be reduced.
  • the present invention is characterized in that, in the above invention, the height dimension from the ground on which the work machine is installed to the exhaust port of the exhaust pipe is set to a height dimension greater than the average height of an adult.
  • the present invention thus configured can realize protection from exhaust gas to persons present around the work machine.
  • the present invention is characterized in that, in the above-mentioned invention, a flange for fixing the exhaust pipe to the upper surface of the counterweight is provided. According to the present invention thus constituted, the exhaust pipe can be stably erected and held on the upper surface of the counterweight via the flange.
  • the present invention is characterized in that, in the above invention, the exhaust pipe cover for preventing the contact with the exhaust pipe is provided.
  • the exhaust pipe cover protects an operator who may come into contact with the exhaust pipe and persons present around the work machine from coming into contact with the heated exhaust pipe. Can. Furthermore, it is particularly suitable as a working machine that is provided with an exhaust gas treatment device and the surface temperature of the exhaust pipe tends to be high.
  • the height dimension of the exhaust pipe is set to the height dimension at which the exhaust port is disposed between the top and the bottom of the roof of the canopy.
  • FIG. 1 It is a side view which shows the vehicle body of the mini shovel which comprises one Embodiment of the working machine which concerns on this invention. It is a rear view of the vehicle body with which the mini shovel shown in FIG. 1 is equipped. It is the perspective view which looked at the vehicle body of the mini shovel shown in FIG. 1 from diagonally forward. It is a top view of the vehicle body of the mini shovel shown in FIG. It is a figure which shows the positional relationship of the operator who sat at the driver's seat of the mini shovel shown in FIG. 1, a rear side left support
  • FIG. 1 is a side view showing a car body of a mini shovel constituting an embodiment of a working machine according to the present invention
  • FIG. 2 is a rear view of a car body provided in the mini shovel shown in FIG. 4 is a plan view of the body of the mini excavator shown in FIG. 1
  • FIG. 5 is an operator sitting on the driver's seat of the mini excavator shown in FIG. It is a figure which shows the positional relationship of an exhaust pipe, (a) figure is a rear view, (b) A figure is a top view.
  • the working machine comprises, for example, a mini shovel.
  • the present embodiment includes a traveling body 1, a revolving unit 2 disposed on the traveling unit 1, and a not-shown working device supported by a support portion 16 disposed on the front side of the revolving unit 2.
  • the work device includes a boom, an arm, a bucket, and the like, and can carry out a digging operation and the like of earth and sand.
  • the traveling body 1 and the revolving body 2 described above constitute a vehicle body.
  • a driver's seat 3 is disposed on the swing frame 2 a of the swing body 2, and a canopy 4 disposed to cover the driver's seat 3 is provided.
  • the canopy 4 is made of, for example, a canopy having four columns. That is, the canopy 4 includes the front right support 5 a, the front left support 5 b, the rear right support 5 c, and the rear left support 5 d.
  • the canopy 4 is provided with a roof 6 which is disposed above the columns 5 a to 5 d and covers the driver's seat 3.
  • a counterweight 7 for securing a weight balance is provided at a portion of the swing body 2 located behind the driver's seat 3.
  • an exhaust pipe 13 having an exhaust port 13a for discharging the exhaust gas of the engine at a position above the counterweight 7 is provided upright.
  • an exhaust pipe cover 21 which is disposed so as to surround the circumferential surface of the exhaust pipe 13 and which prevents contact with the exhaust pipe 13 is provided.
  • the exhaust pipe 13 and the exhaust pipe are located near the virtual straight line 18 connecting the ship point of the driver's seat 3, ie, the seat reference point 17 and the rear left support 5d.
  • a cover 21 is arranged.
  • FIG. 6 is a view for explaining the height position of the exhaust port of the exhaust pipe provided in the present embodiment.
  • the mini shovel according to the present embodiment has the height of the exhaust pipe 13 and the height 6a1 of the top 6a of the roof 6 of the canopy 4 and the height of the bottom 6b.
  • the height dimension is set to be included in the height area 23 between the height dimension 6b1. That is, the lower end of the exhaust port 13a is moved downward by the height position 6b1 of the lowermost portion 6b of the roof 6 so that the upper end of the exhaust port 13a is not positioned higher than the height position 6a1 of the top 6a of the roof 6
  • the height dimension of the exhaust pipe 13 is set so as not to be positioned.
  • the exhaust pipe 13 is disposed such that the direction of the exhaust port 13a of the exhaust pipe 13 is, for example, directed rearward.
  • the height dimension from the ground where the mini shovel is installed to the exhaust port 13a of the exhaust pipe 13 is set to a height dimension greater than the average height of an adult, for example, a height dimension greater than 170 cm.
  • FIG. 7A and 7B are diagrams showing an exhaust pipe and an exhaust pipe cover provided in the present embodiment, where FIG. 7A is a front view, FIG. 7B is a plan view, and FIG. 7C is a perspective view as viewed from the front side d)
  • FIG. 8 is a view showing an exhaust pipe and an exhaust pipe cover provided in the first embodiment, (a) a rear view, (b) a (a) view
  • the BB cross-sectional view of (c) is a CC cross-sectional view of the (a) view
  • (d) is an AA cross-sectional view of the (a) view
  • (e) is a side view.
  • the lower end of the exhaust pipe 13 has a hole communicating with the cylindrical portion of the exhaust pipe 13, and is integrally provided with a flange 19 fixed to the upper surface of the counterweight 7. It is The flange 19 is fixed to the upper surface of the counterweight 7 by a bolt 15.
  • the lower end portion of the exhaust pipe cover 21 is provided with a notch portion which forms an opening portion 30 which allows the insertion of a cleaning tool such as a brush (not shown).
  • a cleaning tool such as a brush (not shown).
  • the exhaust pipe cover 21 is disposed such that the opening 30 is located, for example, only on the driver's seat 3 side.
  • the exhaust pipe cover 21 is disposed with a gap 13 a between itself and the exhaust pipe 13.
  • the exhaust pipe covers 21 extend along the extending direction of the exhaust pipe 13 and are disposed to face each other with a gap 21 C so as to sandwich the exhaust pipe 13.
  • the first divided cover portion 21A and the second divided cover portion 21B are included.
  • the above-mentioned notches are a first notch 21A2 formed at the lower end of the first divided cover 21A, and a second notch 21B2 formed at the lower end of the second divided cover 21B. It consists of
  • the first divided cover portion 21A and the second divided cover portion 21B each have a flat plate-shaped first mounting portion 21A3 and a second mounting portion 21B3 attached to the upper surface of the counterweight 7 at lower ends thereof.
  • the attachment portions 21A3 and 21B3 are fastened together with the flange 19 of the exhaust pipe 13 by the above-described bolt 15 and fixed to the counterweight 7.
  • a large number of slits 21A1 are formed on the side surface of the first divided cover portion 21A.
  • a large number of slits are formed on the side surface of the second divided cover portion 21B.
  • FIG. 9 is an enlarged perspective view showing an upper portion of an exhaust pipe and an exhaust pipe cover provided in the present embodiment
  • FIG. 10 is a view showing a cover holding portion provided in the present embodiment
  • FIG. (B) is a perspective view showing the cover holding portion attached to the exhaust pipe
  • FIG. 11 is a view showing the cover holding portion provided in the present embodiment
  • (a) view Fig. 12 is an enlarged perspective view showing a state in which the cover holding portion is attached to the exhaust pipe
  • Fig. 12 (b) is an enlarged plan view showing the state in which the cover holding portion is attached to the exhaust pipe It is a disassembled perspective view which shows the attachment relation of an exhaust pipe cover.
  • the cover holding portion 24 for holding the exhaust pipe cover 21 on the exhaust pipe 13 is provided.
  • the cover holding portion 24 is, as shown in FIG. 11B, an annular member 24a disposed with a gap 13b with the exhaust pipe 13 so as to surround the circumferential surface of the exhaust pipe 13, and the annular member 24a is supported, and a support member described later fixed by welding, for example, around the exhaust pipe 13, a standing member fixed to the annular member 24a by welding, for example, extended in the vertical direction, and the standing member And an attachment means for attaching the exhaust pipe cover 21 thereto.
  • the annular member 24a is welded to the support member.
  • the above-described support members are composed of a pair of support members 24 b and 24 c disposed to face each other with the exhaust pipe 13 interposed therebetween.
  • the erecting members described above are disposed to face each other with the exhaust pipe 13 interposed therebetween, and each of the first divided cover portion 21A or the second divided cover portion 21B of the exhaust pipe cover 21 is attached and bent. It consists of standing members 24d and 24e.
  • the pair of support members 24 c and 24 d are disposed, for example, in the upper portion of the exhaust pipe 13. Lower portions of the pair of upright members 24d and 24e are fixed by, for example, welding to an annular member 24a supported by the support members 24c and 24d.
  • Attached members 24f and 24g having female threads are fixed to the upper portions of the upright members 24d and 24e, respectively, and corresponding bolts 25 shown in FIG. 9 are attached to the female threads of the attached members 24f and 24g.
  • the attachment members 24f and 24g and the bolts 25 constitute attachment means for attaching the first divided cover portion 21A and the second divided cover portion 21B included in the exhaust pipe cover 21 to the upright members 24d and 24e.
  • the pair of support members 24b and 24c and the pair of upright members 24d and 24e are disposed to be orthogonal to each other in plan view. Further, one cover holding portion 24 having the above-described configuration is provided, and the upper portions of the first divided cover portion 21A and the second divided cover portion 21B are held by the cover holding portion 24 as described above. Lower ends of the cover portion 21A and the second divided cover portion 21B, that is, the first and second attachment portions 21A3 and 21B3 are fixed to the counterweight 7 as described above.
  • the upper surface 7b of the counterweight 7 is formed with a hole 7C to which the exhaust gas of the engine is introduced, and a plurality of bolt holes 7b1 are formed around the hole 7C.
  • the holes 19a formed in the flange 19 of the exhaust pipe 13 and the holes formed in the first mounting portion 21A3 of the first divided cover portion 21A are fitted to the bolt holes 7b1 of the upper surface 7b of the counterweight 7, and the exhaust pipe
  • a hole 19a formed in the flange 19 of 13 and a hole formed in the second attachment portion 21B3 of the second divided cover portion 21B are fitted to the other bolt holes 7b1 on the upper surface of the counterweight 7, and
  • the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13 are fastened, and the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13 are illustrated on the counterweight 7 as shown in FIG.
  • it is fixed in a self-supporting state so as not to contact the canopy 4, and is set up and held.
  • FIG. 13 is a cross-sectional view of an essential part showing an arrangement relationship between a tail pipe and an exhaust pipe provided in the present embodiment.
  • a muffler 10 for guiding and muffling exhaust gas of an engine (not shown) and a tail pipe 11 for guiding the exhaust gas discharged from the muffler 10 are disposed.
  • a passage 7a communicating with the hole 7c of the counterweight 7 shown in FIG. 12 described above is formed in the counterweight 7.
  • the tail pipe 11 is inserted into the passage 7 a so as not to contact the wall surface of the counterweight 7 forming the passage 7 a, and the upper end 11 a is inserted into the exhaust pipe 13.
  • the exhaust gas of the engine is led to the exhaust pipe 13 through the muffler 10 and the tail pipe 11, and discharged outside from the exhaust port 13a of the exhaust pipe 13 at a position above the counterweight 7. Be done.
  • the height dimension of the exhaust pipe 13 is set to the height dimension at which the exhaust port 13a is disposed between the uppermost portion 6a and the lowermost portion 6b of the roof 6 of the canopy 4. It is Since the exhaust gas discharged from the exhaust port 13a of the exhaust pipe 13 is intercepted by the portion between the top 6a and the bottom 6b of the canopy 6 at the time of the turning of the turning body 2 and the like with this configuration, It is possible to reduce the inflow of exhaust gas in the three directions of the seat.
  • the present embodiment is also particularly suitable as a mini-excavator equipped with an exhaust gas treatment device.
  • the exhaust pipe 13 can be made not to protrude from the roof 6 of the canopy 4, relieving the restriction due to the height restriction received when the mini shovel is put on the trailer and transported. Can.
  • the exhaust pipe 13 when entering from the entrance of the building in order to carry out the work in the building, the exhaust pipe 13 is an inlet pipe as long as the height of the entrance is higher than the height of the roof 6. You can enter the building without hitting the top. That is, this embodiment can relieve the restriction by the exhaust pipe at the time of conveyance of the mini shovel, or at the time of work in the building.
  • the exhaust pipe 13 is disposed so that the exhaust port 13a is directed rearward, so the emitted exhaust gas is directed to the driver seat 3 with the discharge direction of the exhaust gas being the opposite direction to the driver seat 3. It can be prevented from flowing in the direction.
  • the height dimension from the ground on which the mini shovel is installed to the exhaust port 13a of the exhaust pipe 13 is set to a height dimension greater than the average height of an adult. It is possible to realize protection from exhaust gases for the people present.
  • the counterweight 7 is provided with a passage 7a into which the tail pipe 11 is inserted, and the upper end 11a of the tail pipe 11 is inserted into the exhaust pipe 13.
  • Exhaust gas led from the muffler 10 to the tail pipe 11 is not radiated to the wall surface forming the passage 7 a of the counterweight 7, and a gap between the tail pipe 11 and the wall surface forming the passage of the counterweight 7 Is provided.
  • the counterweight 7 is not directly heated, and the temperature rise of the counterweight 7 due to the exhaust gas can be suppressed to be low. Therefore, while the exhaust gas is released from the exhaust pipe 13, it is possible to prevent the discomfort due to the contact with the counterweight 7.
  • the exhaust pipe 13 is heated by the exhaust gas being introduced, but the radiation heat from the surface of the exhaust pipe 13 is erected behind the driver's seat 3 by the rear left support 5d. It is blocked. As a result, it is possible to prevent the operator 22 seated in the driver's seat 3 from having an unpleasant warmth due to the heat of the exhaust gas. Therefore, in the case of a working machine provided with the above-described exhaust gas processing device in which the temperature of the exhaust gas tends to be high, the surface temperature of the exhaust pipe 13 also tends to be high. As described above, the present embodiment is also suitable as a mini-excavator in which the surface temperature of the exhaust pipe 13 increases and the above-described radiation heat increases.
  • the opening 30 for permitting the insertion of the cleaning tool such as the brush is formed at the lower end portion of the first and second divided cover portions 21A and 21B included in the exhaust pipe cover 21. Since the second notches 21A2 and 21B2 are formed, dust such as dead leaves intrudes from the gap 13b between the exhaust pipe 13 and the first and second divided cover parts 21A and 21B. If the first and second divided cover portions 21A and 21B are not disassembled, the lower end portions of the first and second divided cover portions 21A and 21B are collected when they are accumulated near the lower end portions of the two divided cover portions 21A and 21B.
  • the present embodiment is also suitable as a mini-excavator that is equipped with the exhaust gas treatment device and the temperature of the exhaust gas tends to be high, and it is particularly desirable to prevent dust such as dead leaves from contacting the exhaust pipe 13 It is. Furthermore, this first embodiment is suitable for a mini-excavator often used in a work environment where waste such as dead leaves is likely to be produced, such as in a town.
  • the opening 30 formed by the first and second notches 21A2 and 21B2 of the first and second divided cover parts 21A and 21B is positioned only on the driver's seat 3 side. Because the first and second divided cover portions 21A and 21B are disposed, the opening 30 is hidden behind the driver's seat 3, thereby preventing contact with the heated exhaust pipe 13. Can.
  • a gap portion which is formed in the vicinity of the exhaust pipe 13 and the first and second divided cover portions 21A and 21B and on the driver's seat 3 side and communicates with the opening 30, ie, the driver's seat 3 and the Even when dust intrudes into the clearance formed between the first and second divided cover portions 21A and 21B, the cleaning tool such as a brush along with the dust accumulated in the clearance 30 in the clearance 30 Can be cleaned and removed.
  • the heat of the exhaust pipe 13 due to the exhaust gas can be dissipated from the gap 21C formed between the first divided cover portion 21A and the second divided cover portion 21B.
  • the heat of the exhaust pipe 13 between the pipe 13 and the first and second divided cover portions 21A and 21B can prevent the first and second divided cover portions 21A and 21B from being heated.
  • dust such as dead leaves which enter from the gap 21C of the first and second divided cover portions 21A and 21B and accumulated near the lower end portions of the exhaust pipe 13 and the first and second divided cover portions 21A and 21B is also an opening portion. It can be easily cleaned and removed by inserting a cleaning tool such as a brush at 30.
  • the exhaust pipe cover 21 including the first divided cover portion 21A and the second divided cover portion 21B can be stably erected. It can be held.
  • the support members 24b and 24c fixed to the circumferential surface of the exhaust pipe 13, the annular member 24a supported by the support members 24b and 24c, and the upright members fixed to the annular member 24a.
  • the first and second divided cover portions 21A, 21A, and 24b and the bolts 25 attach the first and second divided cover portions 21A and 21B to the erected members 24d and 24e, respectively. 21B can be stably held.
  • the heat of the exhaust pipe 13 heated by the exhaust gas is transmitted to the support members 24 b and 24 c fixed to the circumferential surface of the exhaust pipe 13, and the exhaust pipe 13 is transmitted from these support members 24 b and 24 c.
  • the two split cover portions 21A and 21B are transmitted. Therefore, the heat transferred from the exhaust pipe 13 to the support members 24b and 24c is mainly cooled after being cooled at the portion of the annular member 24a located between the support members 24b and 24c and the standing members 24d and 24e.
  • a heat insulating material or a long body is formed so as to surround the exhaust pipe 13 with the heat transmitted from the exhaust pipe 13 to the first and second divided cover portions 21A and 21B. It can be lowered without requiring a tubular member. Therefore, the safety at the time of contacting the first and second divided cover portions 21A and 21B provided in the present embodiment is secured.
  • the first and the second members are disposed via the annular member 24a disposed with a gap 13b between the exhaust pipe 13 and the first and the second embodiments without using the heat insulating material and the cylindrical member forming the long body.
  • the exhaust pipe 13 can hold the second divided cover portions 21A and 21B.
  • the first divided cover portion 21A included in the exhaust pipe cover 21 is fixed to the exhaust pipe 13 by a pair of support members 24b and 24c, and an annular member supported by the support members 24b and 24c. It can be attached to the exhaust pipe 13 via the upright member 24d of the pair of upright members 24d and 24e fixed to the annular member 24a. Further, a pair of support members 24b and 24c fixing the second divided cover portion 21B to the exhaust pipe 13, an annular member 24a supported by the support members 24b and 24c, and a standing installation provided to the annular member 24a It can be attached to the exhaust pipe 13 via the member 24e.
  • each of the pair of erected members 24d and 24c is bent, it is possible to ensure relatively high strength.
  • the first cover portion 21A and the second cover portion 21B included in the exhaust pipe cover 21 can be stably erected and held on the exhaust pipe 13.
  • the gap 21C is formed between the opposing first divided cover portion 21A and the second divided cover portion 21B, the side surfaces of the first and second divided cover portions 21A and 21B are also formed. Since the slits 21A1 and the like are formed in the above, the heat of the exhaust pipe 13 does not stay between the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13, and the heat of the exhaust pipe 13 It can be dissipated to the outside from 21 C and the slit 21 A or the like. Accordingly, the heating of the first and second divided cover portions 21A and 21B due to such stagnant heat can be suppressed.
  • the pair of support members 24b and 24c are fixed to the upper portion of the exhaust pipe 13, and the annular members 24a supported by the support members 24b and 24c are located below the pair of upright members 24d and 24e. It has a fixed configuration. With this configuration, the mounting position of the exhaust pipe cover 21 in the cover holding portion 24 can be set to a high position at the top of the exhaust pipe 13.
  • the lower part of the exhaust pipe 13 is located in the vicinity of the introduction part of the exhaust gas discharged from the muffler 10, and the temperature of the lower part becomes high due to the high temperature of the exhaust gas.
  • the temperature of the upper portion of the exhaust pipe 13 is lower than that in the lower portion due to the temperature decrease accompanying the rise of the exhaust gas.
  • the heat of the upper part of the exhaust pipe 13 whose temperature has dropped in this way is contained in the exhaust pipe cover 21 through the support members 24b and 24c, the annular member 24a, and the standing members 24d and 24e.
  • the temperature of the first and second divided cover portions 21A and 21B attached to the exhaust pipe 13 by the cover holding portion 24 can be suppressed to a relatively low level.
  • the pair of support members 24b and 24c and the pair of upright members 24d and 24e are arranged to be orthogonal to each other in plan view.
  • the first divided cover portion 21 A side and the second Since the portions of the annular member 24a positioned on the divided cover portion 21B side and the pair of standing members 24d and 24e are arranged symmetrically with respect to the above-mentioned center line, a stable weight balance on the left and right is ensured.
  • stable holding of the exhaust pipe 13 of the first and second divided cover portions 21A and 21B can be realized.
  • the heat transfer path transmitted from the support members 24b and 24c to the first divided cover portion 21A or the second divided cover portion 21B via the annular member 24a and the standing members 24d and 24e may be a relatively long path. This contributes to lowering the temperature of the first and second divided cover portions 21A and 21B.
  • the upper portions of the first and second divided cover portions 21A and 21B are held by the cover holding portion 24 and the lower portions are fixed to the counterweight 7, respectively.
  • the second divided cover portions 21A and 21B can be stably erected and held in a self-supporting state not contacting the surrounding members as described above. Therefore, the first and second divided cover portions 21A and 21B can be cooled by the air surrounding the first and second divided cover portions 21A and 21B, and the heat of the first and second divided cover portions 21A and 21B is Transmission to the surrounding members is prevented. Further, the provision of only one cover holding portion 24 which tends to increase the number of members contributes to the reduction of the manufacturing cost.
  • the exhaust pipe 13 and the exhaust pipe cover 21 are disposed in the vicinity of the virtual straight line 18 connecting the seat reference point 17 of the driver's seat 3 and the rear left support 5 d of the canopy 4
  • the exhaust pipe 13 and the exhaust pipe cover 21 may be disposed on the surface 18.
  • the said embodiment arrange
  • the exhaust pipe 13 and the exhaust pipe cover 21 are disposed on a virtual straight line connecting the seat reference point 17 of the seat 3 and the rear right support 5 c of the canopy 4 or at a position near the virtual straight line. May be Such a configuration can also ensure a good rearward visibility of an operator or the like seated in the driver's seat 3.
  • the exhaust pipe 13 is arrange
  • only one cover holding portion 24 for holding the exhaust pipe cover 21 on the exhaust pipe 13 is provided on the upper part of the exhaust pipe 13.
  • the lower end part of the exhaust pipe cover 21 is used as the counterweight 7
  • the exhaust pipe cover 21 may be configured to be held on the exhaust pipe 13 by the cover holding portions 24 provided on both the upper portion and the lower portion of the exhaust pipe 13 without being fixed.
  • the working machine which concerns on the said embodiment consists of mini shovels
  • this invention is not limited to mini shovels.
  • the present invention is also applicable to working machines such as hydraulic excavators which are larger than mini excavators.
  • Running body (vehicle body) 2 Rotating body (vehicle body) Reference Signs List 3 driver's seat 4 canopy 6 roof 6a top 6a1 height 6b bottom 6b1 height 7 counterweight 7b top 10 muffler 11 tail pipe 13 exhaust pipe 13a exhaust port 16 support 21 exhaust pipe cover 21A first division cover section 21B 2nd division cover part 22 operator

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

L'objectif de la présente invention est de proposer une machine de terrassement capable de réduire l'écoulement, vers le siège de l'opérateur, de gaz d'échappement évacués à partir d'un orifice d'évacuation d'un tuyau d'échappement, et capable de réduire des restrictions entraînées par le tuyau d'échappement durant le transport de la machine de terrassement et durant un travail dans un environnement intérieur. Ce mini-excavateur comprend : un corps rotatif (2) ; un dispositif de terrassement fixé à ce corps rotatif (2) ; le siège (3) de l'opérateur qui est agencé sur le corps rotatif (2) ; une cabine (4) qui est prévue au-dessus du corps rotatif (2) et qui comporte un toit (6) qui recouvre la zone au-dessus du siège (3) de l'opérateur ; un pot d'échappement (10) qui est agencé sur le corps rotatif (2) et vers lequel les gaz d'échappement du moteur sont guidés ; et un tuyau d'échappement (13) qui comporte l'orifice d'évacuation (13a) qui émet les gaz d'échappement évacués à partir de ce pot d'échappement (10) dans une position au-dessus d'un contrepoids (7). Le mini-excavateur présente une configuration grâce à laquelle la hauteur du tuyau d'échappement (13) est réglée à la hauteur à laquelle l'orifice d'évacuation (13a) est agencé entre la section la plus haute (6a) et la section la plus basse (6b) du toit (6) de la cabine (4).
PCT/JP2012/075659 2012-03-27 2012-10-03 Machine de terrassement WO2013145385A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012071940A JP5759408B2 (ja) 2012-03-27 2012-03-27 ミニショベル
JP2012-071940 2012-03-27

Publications (1)

Publication Number Publication Date
WO2013145385A1 true WO2013145385A1 (fr) 2013-10-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/075659 WO2013145385A1 (fr) 2012-03-27 2012-10-03 Machine de terrassement

Country Status (2)

Country Link
JP (1) JP5759408B2 (fr)
WO (1) WO2013145385A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007062506A (ja) * 2005-08-30 2007-03-15 Hitachi Constr Mach Co Ltd 建設機械
JP2012057414A (ja) * 2010-09-10 2012-03-22 Hitachi Constr Mach Co Ltd 作業機械

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007062506A (ja) * 2005-08-30 2007-03-15 Hitachi Constr Mach Co Ltd 建設機械
JP2012057414A (ja) * 2010-09-10 2012-03-22 Hitachi Constr Mach Co Ltd 作業機械

Also Published As

Publication number Publication date
JP2013204248A (ja) 2013-10-07
JP5759408B2 (ja) 2015-08-05

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