CN102536421B - Engineering machine - Google Patents

Abstract

The present invention provides an engineering machine which can prevent abrasion and damage of a middle housing that is formed by elastic material, and ensures cooling efficiency and improves reliability. The engineering machine of the invention is provided with a heat exchanger side jointing projection (26) on a heat exchanger side housing (23). Furthermore a middle housing (25) is provided with a middle housing side jointing projection (27). Even when a displacement inclination occurs in a circumferential direction relative to the heat exchanger side housing (23) along with vibration and swinging of an engine (8) in operation of a hydraulic excavator (1), the middle housing side jointing projection (27) abuts against the heat exchanger side jointing projection (26) in the circumferential direction. Therefore, displacement of the middle housing (25) in the circumferential direction can be prevented, thereby preventing abrasion and damage of the middle housing (25).

Description

Engineering machinery

Technical field

The present invention relates to the building machinery of such as hydraulic shovel, wheel loader etc., particularly relate to the engineering machinery of the housing possessing the flowing of adjusting along cooling air.

Background technique

In general, as the hydraulic shovel of the typical case of engineering machinery, car body, by can caterpillar lower traveling body voluntarily and the upper rotation be loaded in pivotally on this lower traveling body form, can be provided with apparatus for work to pitch rotation in the toe lateral of upper rotation.And hydraulic shovel makes upper rotation turn round the digging operation etc. carrying out sand.

Here, the upper rotation of hydraulic shovel comprises: the slewing frame forming supporting structure; Be arranged at the rear end side of this slewing frame in order to keep the counterweight with the weight balancing of apparatus for work; Be positioned at the front side of this counterweight and the motor as prime mover be loaded on slewing frame; To be arranged near this motor and to the heat exchanger cooled by the liquid heated; And with this heat exchanger in the face of to configure and by rotating motor come as power source the cooling fan that heat exchanger supplies cooling air.

In this case, heat exchanger is made up of the radiator of the cooling water of cooled engine, the oil cooler etc. of cooling work oil, when utilizing engine operation, cooling fan rotates heat exchanger supply cooling air, thus can cool the liquid that should cool of cooling water, work wet goods.

On the other hand, be provided with at the outer circumferential side of the cooling fan of heat exchanger supply cooling air the housing forming cooling air passage between these cooling fan and heat exchanger.This housing such as roughly comprises: be arranged at heat exchanger side and have the heat exchanger side body of opening portion; Be arranged at cooling fan side and surround the fan side housing (engine side housing) of the tubular of this cooling fan from outer circumferential side; And to be arranged between heat exchanger side body and fan side housing and to divide the middle casing (tubular rubber) of the tubular forming cooling air passage.(for example, referring to Japanese Unexamined Patent Publication 10-212955 publication)

According to prior art, the two end part of the middle casing of tubular are configured to, and by reeling linking belt with the outer circumferential face of heat exchanger side body and embedding this outer circumferential side that is incorporated in of the outer circumferential face of fan side housing, thus are fixed on heat exchanger side body and fan side housing.

When this formation, the tightening force of such as linking belt with Long-Time Service etc. and lower degradation time, have the danger that following problem occurs.

Namely, be installed to the motor on slewing frame by vibration-proof mounting to produce vibration with the traveling of engineering machinery or digging operation etc. relative to slewing frame, swing.Now, if the tightening force of such as linking belt declines, then such as middle casing is relative to heat exchanger side body to circumferencial direction displacement (rotation), thus there is the danger of the end inner peripheral surface of middle casing and the end outer circumferential face phase mutual friction of heat exchanger side body.Thus, the end inner peripheral surface that there is middle casing is worn away, damages, and cooling air spills from this position, the problem of cooling effectiveness reduction and so on.

Summary of the invention

The present invention completes in view of above-mentioned prior art problem, and the object of invention is to provide a kind of abrasion, the damage that can prevent middle casing, can guarantee cooling effectiveness and improve the engineering machinery of reliability.

In order to solve the problem, the present invention is applied in the following engineering machinery formed, and this project machinery possesses: be mounted with prime mover and can car body voluntarily; To be arranged on this car body and to the heat exchanger cooled by the liquid heated; With this heat exchanger in the face of configuring and supplying the cooling fan of cooling air to this heat exchanger; And between this cooling fan and described heat exchanger, form the housing of cooling air passage, wherein, this housing comprises: be arranged at described heat exchanger side and have the heat exchanger side body of opening portion; Be arranged at described cooling fan side and surround the fan side housing of the tubular of this cooling fan from outer circumferential side; And to be arranged between described heat exchanger side body and described fan side housing and to divide the middle casing of the tubular forming described cooling air passage.

And, the feature of the formation that the invention of first scheme adopts is, the opening portion of described heat exchanger side body arranges heat exchanger side engagement portion, position corresponding with described heat exchanger side engagement portion in described middle casing is arranged engagement portion, middle case side, by making described heat exchanger side engagement portion engage with engagement portion, described middle case side, prevent described middle casing from producing displacement in a circumferential direction relative to described heat exchanger side body.

The formation that the invention of alternative plan adopts is, described heat exchanger side body has the mounting cylinder portion to the outstanding tubular in described middle casing side, described middle casing has the assembly department of the tubular of the outer circumferential side being installed on described mounting cylinder portion, described heat exchanger side engagement portion is made up of the heat exchanger side engaging protrusion of the outer circumferential side being arranged on described mounting cylinder portion, and engagement portion, described middle case side is by be arranged on described assembly department and to form in the middle case side engaging protrusion that circumferencial direction abuts with described heat exchanger side engaging protrusion.

The formation that the invention of third program adopts is, described heat exchanger side body has the mounting cylinder portion to the outstanding tubular in described middle casing side, described middle casing has the assembly department of the tubular of the outer circumferential side being installed on described mounting cylinder portion, described heat exchanger side engagement portion is made up of the undercut groove be arranged in described mounting cylinder portion, and engagement portion, described middle case side is formed by be arranged on described assembly department and to insert the engaging protrusion be embedded in described undercut groove.

Effect of the present invention is as follows.

According to first scheme of the present invention, owing to being configured to arrange heat exchanger side engagement portion on heat exchanger side body, and engagement portion, middle case side is set on middle casing, therefore, even if motor produces vibration, swings with the traveling, digging operation etc. of engineering machinery, thus middle casing has the tendency producing displacement relative to heat exchanger side body in a circumferential direction, also this displacement can be stoped by engagement portion, middle case side with the engaging of heat exchanger side engagement portion.Thereby, it is possible to prevent the end outer circumferential face phase mutual friction of the end inner peripheral surface of middle casing and heat exchanger side body, can prevent because of the abrasion of middle casing, the spilling of damage and the cooling air caused.Its result, can guarantee cooling effectiveness and improve reliability.

According to alternative plan of the present invention, heat exchanger side engagement portion is made up of heat exchanger side engaging protrusion, and engagement portion, middle case side is made up of middle case side engaging protrusion.Therefore, even if middle casing has the tendency producing displacement relative to heat exchanger side body in a circumferential direction, also can be abutted at circumferencial direction with heat exchanger side engaging protrusion by middle case side engaging protrusion, stop the displacement of the circumferencial direction of middle casing.Thereby, it is possible to prevent from, because of the abrasion of middle casing, damage and spilling of the cooling air caused, can cooling effectiveness being guaranteed and improving reliability.

According to third program of the present invention, heat exchanger side engagement portion is made up of undercut groove, and engagement portion, middle case side is made up of engaging protrusion.Therefore, even if middle casing has the tendency producing displacement relative to heat exchanger side body in a circumferential direction, also can be embedded in undercut groove by engaging protrusion insertion and stop its displacement, therefore, stop the displacement of the circumferencial direction of middle casing.Thereby, it is possible to prevent from, because of the abrasion of middle casing, damage and spilling of the cooling air caused, can cooling effectiveness being guaranteed and improving reliability.

Accompanying drawing explanation

Fig. 1 is the plan view of the hydraulic shovel represented according to the first embodiment of the present invention.

Fig. 2 is the sectional view observed from arrow II-II direction Fig. 1 representing motor, heat exchanger unit, cooling fan, housing etc.

Fig. 3 is the amplification view in (III) portion represented in Fig. 2 of motor, heat exchanger unit, cooling fan, housing etc.

Fig. 4 is the stereogram representing motor, heat exchanger unit, cooling fan, housing etc.

Fig. 5 is the stereogram being equivalent to (V) portion in Fig. 4 of the state representation housing having blocked middle casing etc.

Fig. 6 is the exploded perspective view representing heat exchanger unit and housing.

Fig. 7 be represent middle casing with monomer block stereogram.

Fig. 8 is the amplification view in (VIII) portion represented in Fig. 3 of cooling fan, housing etc.

Fig. 9 is the stereogram identical with Fig. 5 representing housing according to a second embodiment of the present invention etc.

Figure 10 is the stereogram representing heat exchanger unit.

With monomer, Figure 11 represents that the identical with Fig. 7 of middle casing blocks stereogram.

Figure 12 is the amplification view identical with Fig. 8 representing cooling fan, housing etc.

Symbol description

1-hydraulic shovel (engineering machinery), 2-lower traveling body (car body), 3-upper rotation (car body), 8-motor (prime mover), 11-heat exchanger unit, 15-heat exchanger, 15A-radiator, 15B-oil cooler, 15C-condenser, 18-cooling fan, 21-housing, 22-cooling air passage, 23-heat exchanger side body, 23B-mounting cylinder portion, 24-fan side housing, 25-middle casing, 25A-assembly department, 26-heat exchanger side engaging protrusion (heat exchanger side engagement portion), 27-middle case side engaging protrusion (engagement portion, middle case side), 31-undercut groove (heat exchanger side engagement portion), 32-engaging protrusion (engagement portion, middle case side).

Embodiment

, enumerate the example of the occasion be applied on hydraulic shovel below, with reference to accompanying drawing while describe the mode of execution relating to engineering machinery of the present invention in detail.

Fig. 1 to Fig. 8 represents the first mode of execution of the present invention.In figure, symbol 1 is the hydraulic shovel as engineering machinery, and this hydraulic shovel 1 is by caterpillar lower traveling body 2 voluntarily and the upper rotation 3 be assemblied in pivotally on this lower traveling body 2 forming car body.And, can be provided with apparatus for work 4 to pitch rotation in the toe lateral of upper rotation 3, be carried out the digging operation etc. of sand by this apparatus for work 4.

Here, upper rotation 3 is made up of following slewing frame 5, operator cabin 6, counterweight 7, motor 8, cabin cover 10, heat exchanger unit 11, cooling fan 18, housing 21 etc.

Symbol 5 is the slewing frames forming upper rotation 3, and this slewing frame 5 is formed as supporting structure.And as shown in Fig. 2 and Fig. 4 etc., slewing frame 5 is roughly made up of following part, the base plate 5A that the steel plate etc. thicker by thickness extended namely, is in front-rear direction formed; Erect and be arranged on this base plate 5A also in the lateral direction with left intermediate beam 5B, right center sill 5C that the spacing of regulation extends in front-rear direction; Spacing form is entered and the left side framework 5D, the right framework 5E that extend in front-rear direction between the left and right of this each center sill 5B, 5C is with regulation; Stretch out in the lateral direction from above-mentioned base plate 5A and center sill 5B, 5C and support left and right side frame frame 5D, 5E many at its front end and stretch out beam 5F; And be arranged at base plate 5A and the multiple lower cover plate 5G between frame 5D, 5E.And, apparatus for work 4 can be installed pitching pivotally in the front side of each center sill 5B, 5C.

Slewing frame 5 is provided with and is positioned at its left back portion and the mounting bracket 5H that extends in front-rear direction, as shown in Fig. 2 and Fig. 3 etc., this mounting bracket 5H is for installing the lower bracket 14 etc. of following heat exchanger unit 11.Here, the steel that mounting bracket 5H is コ font by such as sectional shape are formed, and its end is fixed on by methods such as welding and is positioned at forward and backward stretch out on beam 5F.

Symbol 6 is the operator cabins (with reference to Fig. 1) of the front left side being loaded into slewing frame 5, and this operator cabin 6 is taken for operator.Further, have in the internal configurations of operator cabin 6 (all not shown) such as the indoor sets of the driver's seat taken for operator, various operating stem, aircondition.

Symbol 7 is the counterweights (with reference to Fig. 1) of the rearward end being installed on slewing frame 5, and this counterweight 7 is formed as heavy thing, is used for keeping the weight balancing with apparatus for work 4.

Symbol 8 represents the front side and the motor as prime mover be loaded on slewing frame 5 that are positioned at counterweight 7.Here, with regard to motor 8, the axis of bent axle 8A is configured with the accumbency state extended in left-right direction, and such as its four bights are installed on slewing frame 5 by vibration-proof mounting 8B.Further, motor 8 has the water jacket (not shown) for engine cooling water circulation, and this water jacket is connected to the following radiator 15A for dispelling the heat to cooling water.

In the end of the bent axle 8A of motor 8, driving pulley 8C is installed.Being rotated through of this driving pulley 8C is referred to as V-strapped endless belt 8D and is delivered on driven pulley 8E, thus the following cooling fan 18 be installed on this driven pulley 8E is rotated.

Use multiple (such as three) bracket 8F, in the left side (cooling fan 18 side) of motor 8, following fan side housing 24 is installed.In addition, each bracket 8F is provided with the fan protector 8G (with reference to Fig. 4) for preventing from being involved in cooling fan 18.

Symbol 9 represents and is installed on the oil hydraulic pump on the right side of motor 8, this oil hydraulic pump 9 by being undertaken driving by motor 8 using working oil as hydraulic oil towards discharge such as apparatus for work 4 grade.In addition, from the working oil that apparatus for work 4 etc. returns, can cool by flowing through following oil cooler 15B.

Symbol 10 to represent between operator cabin 6 and counterweight 7 and the cabin cover be arranged on slewing frame 5.Shown in waiting as shown in Figure 1, Figure 2, this cabin cover 10 roughly comprises: left and right side panel 10A, 10B that the left and right sides being positioned at slewing frame 5 also extends in front-rear direction; This each between side plate 10A, 10B to substantially horizontal extend top plate 10C; And cover the opening portion 10C1 hood 10D of this top plate 10C.And on the Left-Hand Panel 10A of cabin cover 10, be formed with the inflow entrance 10E that the cooling air F to the supply of following heat exchanger 15 is flowed into, right panel 10B is formed the outflow opening 10F of the cooling air F outflow making to have passed motor 8 grade.

Symbol 11 is that this heat exchanger unit 11 is roughly made up of following supporting frame support body 12, upper bracket 13, lower bracket 14, heat exchanger 15 etc. with following cooling fan 18 in the face of being arranged at the heat exchanger unit in the left side of motor 8.

Symbol 12 is the supporting frame support bodys of the belfry forming heat exchanger unit 11, and this supporting frame support body 12 for following heat exchanger 15 being configured in the left back portion of slewing frame 5, and forms heat exchanger side body 23.Here, as shown in Fig. 2, Fig. 4 and Fig. 6, this supporting frame support body 12 roughly comprises: at the fore-and-aft direction of upper rotation 3 by relative abreast side plate 12A, 12B of spacing of regulation; Extend in front-rear direction in the mode on the top linking this each side plate 12A, 12B and the connecting member 12C of the long box like on the top of cover heating exchanger 15; And be positioned at each side plate 12A, 12B, connecting member 12C downstream side (motor 8 side) and the following heat exchanger side body 23 of all-in-one-piece is set with these each side plate 12A, 12B, connecting member 12C.

In the side, upstream of supporting frame support body 12, across each side plate 12A, 12B, the stiffening element 12D for improving intensity while allowing cooling F wind circulation is installed.In addition, be provided with for these each side plate 12A, 12B are stretched out bolt hole 12E on beam 5F (with reference to Fig. 6) with being bolted in the lower end side of each side plate 12A, 12B.Further, be provided with mounting plate 12F for supporting following condenser 15C etc. (with reference to Fig. 2) at the central position of each side plate 12A, 12B in the mode of setting up side plate 12A, 12B.

Symbol 13 is positioned at the following side of connecting member 12C and the upper bracket extended at the fore-and-aft direction of upper rotation 3, and this upper bracket 13 is such as formed by the steel etc. of cross section in roughly L-shaped of upper lateral bend.Here, upper bracket 13 is for being fixed to supporting frame support body 12 by the upper end portion of following heat exchanger 15.Therefore, upper bracket 13 is provided with along the length direction (fore-and-aft direction) of upper bracket 13 upper end portion of radiator 15A and the upper end portion of oil cooler 15B that form heat exchanger 15 side by side.And upper bracket 13 is fixed by screw thread and is installed on the connecting member 12C of supporting frame support body 12.

Symbol 14 is positioned at the downside of upper bracket 13 and the lower bracket extended at fore-and-aft direction, and this lower bracket 14 is such as formed by the steel etc. of cross section in roughly L-shaped of lower lateral bend.Here, these heat exchangers 15 and supporting frame support body 12 for the underpart of heat exchanger 15 is being fixed to supporting frame support body 12, and are fixed on the mounting bracket 5H of slewing frame 5 by lower bracket 14.Therefore, lower bracket 14 is provided with along the length direction of lower bracket 14 underpart of radiator 15A and the underpart of oil cooler 15B that form heat exchanger 15 side by side.And, with regard to lower bracket 14, its length direction (fore-and-aft direction) two end part are fixed by screw thread and are installed on the lower end side of each side plate 12A, 12B of supporting frame support body 12, and its lower end side is fixed by screw thread and is installed on the upper surface of mounting bracket 5H of slewing frame 5.

Symbol 15 represents and is configured at the heat exchanger of supporting frame support body 12 inside, and this heat exchanger 15 is for engine cooling water, being cooled by the fluid heated of work wet goods.Here, heat exchanger 15 comprises the condenser 15C etc. being installed on radiator 15A, the oil cooler 15B on supporting frame support body 12 by upper bracket 13 and lower bracket 14 and being installed on by mounting plate 12F on supporting frame support body 12.

And radiator 15A passes through the thermal transpiration of the engine cooling water that will circulate between the water jacket of motor 8 in cooling air F, cools by the engine cooling water heated.Oil cooler 15B by by from the various hydraulic transmissions be loaded on hydraulic shovel 1 to the thermal transpiration of the working oil (oil return) of service tank (not shown) circulation in cooling air F, cool by the working oil heated.Condenser 15C, by by being used for the thermal transpiration of the refrigerant (refrigerant by compressing) be arranged in the aircondition in operator cabin 6 in cooling air F, cools by the refrigerant heated.

Symbol 16 is installed on the water storage tank on the side plate 12A of supporting frame support body 12, and this water storage tank 16 is for holding the engine cooling water to radiator 15A supply.In addition, symbol 17 is Air Filters of upstream side of radiator cover 15, oil cooler 15B, and this Air Filter 17 is installed on upside, each bracket 13,14 in downside removably.

Symbol 18 is and the inhalation type cooling fan of heat exchanger 15 in the face of configuring, and this cooling fan 18 is installed on the driven pulley 8E of motor 8.And cooling fan 18, by using motor 8 rotary actuation as power source, sucks outside air in cabin cover 10, and using the supply such as radiator 15A, oil cooler 15B, condenser 15C of this outside air as cooling air F heat exchanger 15.

The housing 21 exchanged below along cooling air F is described.

Namely, symbol 21 is arranged on the housing between cooling fan 18 and heat exchanger 15, and this housing 21 is used for forming cooling air passage 22 between cooling fan 18 and heat exchanger 15.Here, housing 21 is roughly made up of heat exchanger side body 23, fan side housing 24, middle casing 25.

Symbol 23 is the heat exchanger side bodies being arranged on heat exchanger 15 side, and this heat exchanger side body 23 also position is downstream formed by than the heat exchanger 15 in the supporting frame support body 12 of heat exchanger unit 11.Here, heat exchanger side body 23 is from radiator 15A and the oil cooler 15B box like outstanding to cooling fan 18 side, and the face relative with cooling fan 18 is formed opening portion 23A.

Around opening portion 23A, be provided with the mounting cylinder portion 23B to motor 8 side (cooling fan 18 side) outstanding cylindrical shape, this mounting cylinder portion 23B is provided with following middle casing 25.In addition, as shown in Fig. 6 etc., the outer circumferential face of mounting cylinder portion 23B is provided with following heat exchanger side engaging protrusion 26.

Symbol 24 is the fan side housings being arranged on cooling fan 18 side, and this fan side housing 24 is the cylindrical body of roughly U-shaped as the cross section surrounding cooling fan 18 from outer circumferential side and forms.Here, as shown in Fig. 2, Fig. 4 and Fig. 5 etc., fan side housing 24 base end part is fixed on motor 8.Namely, on fan side housing 24, being provided with multiple installation sheet 24B from outer circumferential face 24A radially outwardly projecting, by utilizing bolt 24C to be installed to these each installation sheet 24B to be located on the bracket 8F on motor 8, thus fan side housing 24 being fixed on motor 8.In addition, as shown in Fig. 8 etc., with regard to fan side housing 24, forward end becomes free end and extends in the mode that the middle casing 25 with following is overlapping, axial intermediate portion 24D is in roughly U-shaped, and its outer circumferential face 24A makes and becomes large recessed curved shape curved surface towards axial both end sides diameter.

Symbol 25 to be provided between heat exchanger side body 23 and fan side housing 24 and to divide the middle casing forming cooling air passage 22, and this middle casing 25 is made up of the cylinder using the elastic material of such as rubber etc. to be formed.Here, middle casing 25 is configured to roughly comprise: the assembly department 25A being installed to the outer circumferential side of the mounting cylinder portion 23B of heat exchanger side body 23; From the intermediate cylinder portion 25B that the end limit of this assembly department 25A extends to motor 8 side; From the end limit of this intermediate cylinder portion 25B to the inward flange portion 25C that radially inner side extends; Be arranged at the contacting part 25D of the forward end of this inward flange portion 25C; Be arranged at the inside protrusions portion 25E of the vicinity of this contacting part 25D; And following middle case side engaging protrusion 27.

Here, assembly department 25A is provided with the following groove 25F being wound with strapping strand 28 along whole circumference.In addition, contacting part 25D circumferentially contacts whole with the outer circumferential face 24A of fan side housing 24, and chimeric with the outer circumferential face 24A of fan side housing 24 with the magnitude of interference (passing through interference fit) of regulation.Thus, cooling air F can not spill between contacting part 25D and the outer circumferential face 24A of fan side housing 24, thus guarantees the close property (sealing) of contacting part 25D and fan side housing 24.

In addition, inside protrusions portion 25E is formed as being arranged in inward flange portion 25C than contacting part 25D also by the position of radial outside, and along outstanding in whole circumferential cooling air passage 22.Inside protrusions portion 25E is used for abutting with the outer circumferential face 24A of this fan side housing 24 when fan side housing 24 tilts relative to heat exchanger side body 23 with the swing of the motor 8 during running, thus prevents the end edge 24E of fan side housing 24 from contacting with the inward flange portion 25C of middle casing 25.

The following describes and prevent the heat exchanger side engaging protrusion 26 as heat exchanger side engagement portion of middle casing 25 relative to heat exchanger side body 23 displacement in a circumferential direction (rotation) and the middle case side engaging protrusion 27 as engagement portion, middle case side.

Symbol 26 is multiple (such as 10 ~ 15) the heat exchanger side engaging protrusion be arranged on heat exchanger side body 23, as shown in Fig. 6 etc., this each heat exchanger side engaging protrusion 26 is arranged on the outer circumferential side from the opening portion 23A of the heat exchanger side body 23 mounting cylinder portion 23B outstanding to middle casing 25 side.Here, each heat exchanger side engaging protrusion 26 is formed as cylindric by metallic material such as such as steel, and is fastened on the outer circumferential side of mounting cylinder portion 23B by welding method etc. with the state of being equidistantly separated by circumferencial direction.And as shown in fig. 5 or the like, each heat exchanger side engaging protrusion 26 is engaged (abutting) with following middle case side engaging protrusion 27 by its end face, and stops middle casing 25 to produce displacement in a circumferential direction relative to heat exchanger side body 23.

Symbol 27 is multiple (such as 2 ~ 4) the middle case side engaging protrusion be arranged on middle casing 25, and this each middle case side engaging protrusion 27 is arranged on the outer circumferential face of the mounting cylinder portion 23B from heat exchanger side body 23 in the assembly department 25A of middle casing 25 to the inner side surface 25A1 that radial outside is holded up.Here, each middle case side engaging protrusion 27 is integrally formed on position corresponding with heat exchanger side engaging protrusion 26 in a circumferential direction in the inner side surface 25A1 of assembly department 25A with assembly department 25A as the jut (tab) of the roughly cubic given prominence to towards motor 8 side from inner side surface 25A1.And, as shown in fig. 5 or the like, each middle case side engaging protrusion 27 by engage (abutting) with the end face of heat exchanger side engaging protrusion 26 in a circumferential direction, and stops middle casing 25 to produce displacement in a circumferential direction with the vibration of motor 8, swing.

Here, the middle case side engaging protrusion 27 is such as, shown in Fig. 5 configured to abut with the end face of the side of the circumferencial direction in heat exchanger side engaging protrusion 26 (being clockwise direction side when observing from motor 8 side).But, such as, other middle case side engaging protrusion 27 shown in Fig. 6 at least any one is configured to abut with the end face of the opposite side of the circumferencial direction of other heat exchanger side engaging protrusion 26 (when observing from motor 8 side for counterclockwise side).Thus, even if the tendency of any direction of middle casing 25 directed circle circumferential direction (either direction in clockwise direction, counter clockwise direction) displacement, also its displacement can be stoped.

Symbol 28 is the strapping strands be pressed to by the assembly department 25A of middle casing 25 on the mounting cylinder portion 23B of heat exchanger side body 23, this strapping strand 28 is such as formed by synthetic resin material etc., and by being positioned at the clamp portion 28A of terminal side and forming from the flexible elongated, belt-shaped portion 28B that has that this clamp portion 28A extends, on clamp portion 28A, in case anti-avulsion falls, state is inserted with strap 28B.

Hydraulic shovel 1 according to the present embodiment has structure as above, the following describes its action.

First, operator to take in operator cabin 6 and operate traveling operating stem, then hydraulic shovel 1 just can be made to advance or fall back by lower traveling body 2.In addition, by operation task operating stem (all not shown), apparatus for work 4 pitch rotation can be made and carry out the digging operation etc. of sand.

When hydraulic shovel 1 operates, by the cooling fan 18 driven by motor 8, air is flowed into from the inflow entrance 10E of cabin cover 10, and by being supplied as cooling air F heat exchanger 15 (radiator 15A, oil cooler 15B, condenser 15C etc.) by this air, the respective fluid that should cool can be cooled.And the cooling air F that have passed heat exchanger 15 flow through housing 21 (heat exchanger side body 23, middle casing 25, fan side housing 24) after be directed to motor 8 side, by externally flowing out from outflow opening 10F after the surrounding of this motor 8, oil hydraulic pump 9 etc.

But, if motor 8 with the traveling, digging operation etc. of hydraulic shovel 1 such as shown in Figure 4 arrow X1 carry out vibrating, swinging relative to slewing frame 5 like that, then the fan side housing 24 be fixed on this motor 8 also produce in the same direction vibration, swing.On the other hand, the situation strapping strand 28 on the assembly department 25A of middle casing 25 existing tightening force and reduce with such as Long-Time Service etc. is wound on.In this case, with the vibration of fan side housing 24, swing, contacting part 25D with the interference fit middle casing 25 be fitted and fixed with on the outer circumferential face 24A of this fan side housing 24 have with such as shown in Figure 5 arrow X2 produce the tendency of displacement like that in a circumferential direction relative to heat exchanger side body 23.

In this case, present embodiment is configured to, and heat exchanger side body 23 arranges heat exchanger side engaging protrusion 26, and on middle casing 25, arrange middle case side engaging protrusion 27.Therefore, even if middle casing 25 has relative to heat exchanger side body 23 in the upper tendency producing displacement of circumferencial direction (arrow X2 direction), also can be abutted in a circumferential direction with heat exchanger side engaging protrusion 26 by middle case side engaging protrusion 27, and stop middle casing 25 to produce displacement in a circumferential direction.

Thereby, it is possible to prevent the outer circumferential face phase mutual friction of the inner peripheral surface of the assembly department 25A of such as middle casing 25 and the mounting cylinder portion 23B of heat exchanger side body 23, can prevent because of the abrasion of middle casing 25, the spilling of damage and the cooling air F caused.Its result, can guarantee cooling effectiveness and improve reliability.

In addition, if motor 8 swings relative to slewing frame 5 with the traveling, digging operation etc. of hydraulic shovel 1, then there is the situation being fixed on the fan side housing 24 on motor 8 and tilting relative to heat exchanger side body 23.

In this case, present embodiment is configured to, and middle casing 25 arranges inside protrusions portion 25E.Therefore, even if fan side housing 24 tilts relative to heat exchanger side body 23 with the swing of motor 8, the inside protrusions portion 25E near the contacting part 25D being arranged on middle casing 25 also abuts with the outer circumferential face 24A of fan side housing 24.

The cooling air F thus, utilizing inside protrusions portion 25E just can prevent the end edge 24E of fan side housing 24 from directly contacting with middle casing 25, can prevent the inward flange portion 25C because of middle casing 25 from wearing away, damage and cause spills.Its result, can guarantee cooling effectiveness and improve reliability.

Below, Fig. 9 to Figure 12 represents the second mode of execution of the present invention.The feature of present embodiment is to be configured to, and stops middle casing to produce displacement (rotation) in a circumferential direction by the undercut groove be arranged on heat exchanger side body with the engaging of the engaging protrusion be arranged on middle casing.In addition, in the present embodiment, for the constitutive requirements note prosign identical with above-mentioned first mode of execution, and the description thereof will be omitted.

In figure, symbol 31 is the undercut groove as heat exchanger side engagement portion be arranged on heat exchanger side body 23, as shown in Figure 10 etc., this undercut groove 31 is arranged at the mounting cylinder portion 23B outstanding to middle casing 25 side from the opening portion 23A of heat exchanger side body 23.Here, undercut groove 31 is formed on a position of the circumferencial direction of mounting cylinder portion 23B in the mode caved in from heat exchanger 15 side, end limit of this mounting cylinder portion 23B.And, as shown in Fig. 9 etc., the formation of undercut groove 31 is inserted by following engaging protrusion 32 to be entrenched in undercut groove 31, and the engaging of this engaging protrusion 32 and undercut groove 31, and stop middle casing 25 to produce displacement in a circumferential direction relative to heat exchanger side body 23.

Symbol 32 represents the engaging protrusion as medial side engagement portion be arranged on middle casing 25.Here, as shown in Figure 11 etc., engaging protrusion 32 is integrally formed as from the tab of this inner peripheral surface roughly cubic outstanding to internal diameter side and assembly department 25A in a position, place (position corresponding with the undercut groove 31 of mounting cylinder portion 23B) of the inner peripheral surface of the assembly department 25A of middle casing 25.And, as shown in Fig. 9 etc., engaging protrusion 32 is configured to be embedded in the undercut groove 31 that is arranged on the mounting cylinder portion 23B of heat exchanger side body 23 by inserting, the engaging of engaging protrusion 32 and undercut groove 31, and stop middle casing 25 to produce displacement in a circumferential direction relative to heat exchanger side body 23.

Hydraulic shovel 1 according to the present embodiment stops the displacement relative to heat exchanger side body 23 of middle casing 25 with the engaging of engaging protrusion 32 by undercut groove 31 as above, as for its basic role, with the effect almost indifference of the first above-mentioned mode of execution.

Namely, according to the present embodiment, even if motor 8 vibrates with the traveling, digging operation etc. of hydraulic shovel 1, swings, make middle casing 25 have with such as shown in Figure 9 arrow X3 produce the tendency of displacement like that in a circumferential direction relative to heat exchanger side body 23, also can be prevented from its displacement by engaging protrusion 32 in undercut groove 31, and stop the displacement of the circumferencial direction (arrow X3 direction) of middle casing 25.Thereby, it is possible to prevent the outer circumferential face phase mutual friction of the inner peripheral surface of the assembly department 25A of such as middle casing 25 and the mounting cylinder portion 23B of heat exchanger side body 23, can prevent because of the abrasion of middle casing 25, the spilling of damage and the cooling air F caused.Its result, can guarantee cooling effectiveness and improve reliability.

In addition, in the above-described first embodiment, enumerate the example making the quantity of heat exchanger side engaging protrusion 26 be different from the occasion of the quantity of middle case side engaging protrusion 27 to be illustrated.But the present invention is not limited thereto, make that the quantity of heat exchanger side engaging protrusion is identical with the quantity of middle case side engaging protrusion also can.

In the above-described 2nd embodiment, the example enumerating the occasion arranging a undercut groove 31 and engaging protrusion 32 is respectively illustrated.But the present invention is not limited thereto, such as, can multiple undercut groove and engaging protrusion be set respectively.

In the above-described 2nd embodiment, enumerate and undercut groove 31 is set on heat exchanger side body 23, and the example arranging the occasion of engaging protrusion 32 on middle casing 25 is illustrated.But the present invention is not limited thereto, such as, heat exchanger side body arranges engaging protrusion, and undercut groove is set on middle casing also can.

In the above-described 2nd embodiment, enumerate and motor 8 is set as prime mover, and the example cooling fan 18 be installed on this motor 8 being carried out the occasion of the formation of rotary actuation by endless belt 8D is illustrated.But the present invention is not limited thereto, such as, be configured to cooling fan and be separated with motor, also can by other driving source rotary actuation cooling fan such as electric motor, oil hydraulic motor.

Further, in the above-described embodiment, enumerate hydraulic shovel 1 as engineering machinery and be illustrated.But the present invention is not limited thereto, such as, be applied in other engineering machinery such as wheel loader, hydraulic hoist, bulldozer and also can.

Claims (3)

1. an engineering machinery, possesses: be mounted with prime mover and can car body voluntarily; To be arranged on this car body and to the heat exchanger cooled by the liquid heated; With this heat exchanger in the face of configuring and supplying the cooling fan of cooling air to this heat exchanger; And between this cooling fan and described heat exchanger, form the housing of cooling air passage, wherein, this housing comprises: be arranged at described heat exchanger side and have the heat exchanger side body of opening portion; Be arranged at described cooling fan side and surround the fan side housing of the tubular of this cooling fan from outer circumferential side; To be arranged between described heat exchanger side body and described fan side housing and to divide the middle casing of the tubular forming described cooling air passage; And be wound on the outer circumferential side of this middle casing, this middle casing is pressed on the strapping strand on above-mentioned heat exchanger side body, the feature of described engineering machinery is,

Described heat exchanger side body has the mounting cylinder portion to the outstanding tubular in described middle casing side, arranges heat exchanger side engaging protrusion at the outer circumferential side in this mounting cylinder portion,

Described middle casing has the outer circumferential side and the assembly department of the tubular of the described strapping strand that reels that are installed on described mounting cylinder portion, the inner side surface of this assembly department arranges middle case side engaging protrusion, this middle case side engaging protrusion is given prominence to from this inner side surface towards above-mentioned prime mover side and is abutted at circumferencial direction with described heat exchanger side engaging protrusion

Described middle casing is stoped to produce displacement in a circumferential direction relative to described heat exchanger side body by making described heat exchanger side engaging protrusion engage with described middle case side engaging protrusion.

2. an engineering machinery, possesses: be mounted with prime mover and can car body voluntarily; To be arranged on this car body and to the heat exchanger cooled by the liquid heated; With this heat exchanger in the face of configuring and supplying the cooling fan of cooling air to this heat exchanger; And between this cooling fan and described heat exchanger, form the housing of cooling air passage, wherein, this housing comprises: be arranged at described heat exchanger side and have the heat exchanger side body of opening portion; Be arranged at described cooling fan side and surround the fan side housing of the tubular of this cooling fan from outer circumferential side; To be arranged between described heat exchanger side body and described fan side housing and to divide the middle casing of the tubular forming described cooling air passage; And be wound on the outer circumferential side of this middle casing, this middle casing is pressed on the strapping strand on above-mentioned heat exchanger side body, the feature of described engineering machinery is,

Described heat exchanger side body has the mounting cylinder portion to the outstanding tubular in described middle casing side, and this mounting cylinder portion arranges the undercut groove caved in above-mentioned heat exchanger side from the end limit in this mounting cylinder portion,

Described middle casing has the outer circumferential side and the assembly department of the tubular of the described strapping strand that reels that are installed on described mounting cylinder portion, and on the inner peripheral surface of this assembly department, arranges outstanding from this inner peripheral surface to internal diameter side and inserts the engaging protrusion be embedded in described undercut groove,

Engaged with engaging protrusion by above-mentioned undercut groove and stop above-mentioned middle casing to produce displacement in a circumferential direction relative to above-mentioned heat exchanger side body.

3. engineering machinery according to claim 1 and 2, is characterized in that,

Described middle casing is configured to also comprise: the intermediate cylinder portion extended to described prime mover side from the end limit of this assembly department; The inward flange portion extended from the end limit in this intermediate cylinder portion to radially inner side; Be arranged at the contacting part of the forward end in this inward flange portion; Be arranged at the inside protrusions portion of the vicinity of this contacting part.