CN101139844A - Working machinery - Google Patents

Abstract

To hold an engine cover in a door opening state by operation of only one hand, and to ensure a large opening angle in the door opening state.A guide hole 28 made from a long linear guide portion 28A and a V-shaped guide 28B is provided on a stay guide 27 of a door opening holding mechanism 21. A first bending portion 28B1 of the V-shaped guide portion 28B is formed so as to curve along a moving track 25 when a tip end side of a stay 22 rises and falls at a position on an opposite side to the linear guide portion 28A. A second bending portion 28B2 is formed from an end portion of the first bending portion 28B1 to have a shape which is generally bent in a V-shape, and extends outward in a diameter direction of the moving track 25 in regard to the first bending portion 28B1. When the engine cover 14 is held in the door opening state, the tip end side of the stay 22 is hooked to the second bending portion 28B2 to be locked.

Description

Work machine

Technical field

The present invention relates to be suitable for use as the Work machine of engineering machinery such as hydraulic crawler excavator, crane, wheel loader, fork truck for example or handling machinery, particularly possess the Work machine of the roof system that holds power sources such as motor.

Background technology

Usually, in Work machines such as hydraulic crawler excavator (engineering machinery), the formation of employing is: the framework of car body is provided with roof system, forms the Machine Room that holds power sources such as motor in inside by this roof system.In addition, that adopts constitutes: the inspection peristome that is provided with the indoor motor of maintenance and inspection machinery on roof system top, and switchably cover this peristome (for example, opening the 2001-180526 communique) with reference to patent documentation 1-spy by hood (hood).

In addition, between above-mentioned hood and roof system, be provided with slide bar (pole) and slide rail (rod guide) for remaining the state (open mode) of opening hood, when hood is carried out opening operation, above-mentioned slide bar is slided along slide rail from a side be displaced to opposite side.

And, be provided with the card-tight part that is used to tighten slide bar at the opposite side of slide rail, when making hood remain open mode, the operator grasps slide bar also is secured to the card-tight part of slide rail with manual working with it.Like this, hood maintenance (fixing) is an open mode.

But, in above-mentioned prior art, but just make hood remain the formation of open mode, thereby exist to differ and surely the opening angle (open angle) of hood is set at the problem of enough big angle by slide bar being clamped at the set card-tight part in slide rail end.

That is, engineering machinery such as hydraulic crawler excavator need make overall width as far as possible little and form compactly because of nearest condition of road surface.Like this, the width dimensions of roof system also will be restricted to less size, and then set inspection must diminish with peristome on the roof system.

Therefore, it is to make its opening angle (open angle) remain open mode that the switch inspection has more than with the hood of peristome with being set at enough big angle, thus the problem of the operation reduction when hood becomes obstacle and safeguards when also having maintenance and checking motor in the roof system.

In addition, in the prior art, when making hood remain open mode, owing to need slide bar be tightened with respect to card-tight part set on the opposite side of slide rail, so there is the problem that the operation that hood is remained open mode is lost time and operator's burden increases with manual working.

That is, when the operator opens hood, need be when opening hood with a hand, hold slide bar and it is secured on the card-tight part of slide rail with another, thereby can not make hood remain open mode with one-handed performance with manual working.

Summary of the invention

The present invention is the scheme that proposes in view of above-mentioned prior art problems, and its objective is provides the Work machine that can only just hood be remained open mode with one-handed performance and can alleviate operator's burden conscientiously.

In addition, other purpose of the present invention provides the open angle that can increase when hood remained open mode, and can be stably keep in repair and check being contained in motor in the roof system etc., simultaneously, can alleviate operator's burden and can improve the Work machine of the operation when safeguarding.

For addressing the above problem, the Work machine that the present invention was suitable for possesses: the framework that is provided with the car body of apparatus for work; Be loaded into the motor on this framework; Setting is arranged on the said frame and marks off the Machine Room that holds this motor and be provided with the roof system that is used to check this motor on top; Switchably be located on this roof system to cover the hood of this roof system peristome; Be located between above-mentioned roof system and the hood, when upwards opening hood, make this hood remain the maintaining body of opening of open mode.

And, the architectural feature that the invention of scheme 1 is adopted is, constitute the above-mentioned maintaining body of opening by a pole and a rod guide, cardinal extremity one side of pole is installed in rotation on the above-mentioned roof system and makes front end one side depict circular-arc moving rail slash along with the switching manipulation of above-mentioned hood and rises and falls, rod guide is arranged on the above-mentioned hood and guides front end one side of above-mentioned pole along with the switching manipulation of this hood, the structure that this rod guide adopts has: the linearity rail portion, its make above-mentioned hood from fastening position when open position is opened, front end one lateral root of above-mentioned pole is come side direction opposite side linearity guiding from length direction according to the opening angle of above-mentioned hood; V-way portion, the opening angle that its opposite side position in this linearity rail portion forms V-arrangement and front end one side of above-mentioned pole directed into above-mentioned hood is maximum maximum open position, and is articulated by the deadweight of above-mentioned hood and to be locking state.

In addition, invention according to scheme 2, the structure of the V-way portion of above-mentioned rod guide comprises: first bend, for the above-mentioned motion track bending that the maximum open position that front end one side of above-mentioned pole is directed into above-mentioned hood from the opposite side position of above-mentioned linearity rail portion is described along front end one side of above-mentioned pole from the opposite side position of above-mentioned linearity rail portion is extended; Second bend, deadweight crooked from the side radially outward of the above-mentioned motion track of front end edge of this first bend and by above-mentioned hood articulate front end one side of above-mentioned pole to be locking state.

Have again, according to the invention of scheme 3, the structure that above-mentioned hood adopts is: with the center of gravity of this hood be configured in than the V-way portion of above-mentioned rod guide by under the position when hood is opened to maximum open position, to move to closing direction because of deadweight.

As mentioned above, according to scheme 1 described invention, because being a rod guide of opening maintaining body, the structure that adopts is provided with long linearity rail portion and V-way portion, and V-way portion wherein forms V-arrangement in the position that becomes above-mentioned linearity rail portion opposite side, so, the open angle that front end one side of above-mentioned pole can be directed into sleekly hood is maximum position, and can be limited in open angle and make pole to opening moving of direction again when maximum.And, if the operator leaves hand from hood after making hood open up into maximum open position, then begin to move because of deadweight to closing direction by this hood, can make front end one side of above-mentioned pole be articulated to the end of V-way portion, and the motion that can lock pole, simultaneously, can at this moment hood be articulated to open mode and maintenance.

Therefore, the operator who carries out the switching manipulation of hood can only remain open mode with singlehanded operation with hood, and can alleviate operator's burden conscientiously.And, by on rod guide, linearity rail portion and V-way portion being set, can increase the opening angle when hood remained open mode, and can be stably keep in repair and check (upkeep operation) being contained in motor in the roof system etc.Like this, can alleviate operator's burden and can improve operation when safeguarding.

In addition, according to scheme 2 inventions disclosed, owing to use first bend of the motion track bending extension of describing from the opposite side position of above-mentioned linearity rail portion along front end one side of pole and second bend that deadweight crooked from the side radially outward of the above-mentioned motion track of front end edge of this first bend and by above-mentioned hood articulates to locking state front end one side of above-mentioned pole is formed in set V-way portion on the rod guide, so it is maximum position along the open angle that motion track directs into hood glibly that V-way portion can be made front end one side of above-mentioned pole by first bend, and can be limited by first bend again and move to opening direction.And, if the operator leaves hand from hood after hood is opened to maximum open position, then begin to move because of deadweight to closing direction by this hood, can make front end one side of above-mentioned pole be articulated to second bend of V-way portion, and the motion that can lock pole, simultaneously, can at this moment hood be articulated to open mode and maintenance.In addition, with hood when open position is closed, can make front end one side of pole move and remove the state that articulates smoothly to first bend from second bend, then, front end one side that can make pole from first bend to linearity rail portion slide displacement and make hood get back to fastening position.

Have again, according to scheme 3 described inventions, when hood is opened up into maximum open position, since with its position of centre of gravity be configured in than the V-way portion of a rod guide by under the position, so when making front end one side of pole be articulated to the V-way portion of a rod guide by deadweight, can stably keep this to articulate state (locking state), and can prevent open mode (locking state) because of external force false dismissal hoods such as for example wind.Therefore, can under the open mode of hood, stably keep in repair and check (maintenance), and can in the burden that alleviates the caused operator of upkeep operation, improve operation, safety etc. motor etc.

Description of drawings

Fig. 1 is the overall diagram of the hydraulic crawler excavator of expression embodiment of the present invention.

Fig. 2 is a vertical view of observing Fig. 1 middle and upper part rotor from upside,

Fig. 3 amplifies the stereogram of representing rotor rear portion, top.

Fig. 4 is the sectional view that the IV-IV direction shown in the arrow is observed roof system peristome and hood from Fig. 2.

Fig. 5 amplifies hood and the sectional view of opening maintaining body in the presentation graphs 4.

Fig. 6 is the sectional view that expression opens up into hood among Fig. 5 the state of maximum open position.

Fig. 7 amplifies the action specification figure that comes to open in the presentation graphs 6 maintaining body.

Fig. 8 is the sectional view that expression opens up into hood the state of opening the holding position.

Fig. 9 amplifies the action specification figure that comes to open in the presentation graphs 8 maintaining body.

Figure 10 is that the pole of maintaining body and the exploded perspective view of a rod guide are opened in expression.

Figure 11 is the front view of a rod guide among expression Figure 10.

Among the figure:

1-hydraulic crawler excavator (Work machine), 2-lower running body, 3-top rotor, the 4-apparatus for work, 5-rotating frame (framework), 6-driver's cabin, the 7-counterweight, 8-roof system, 8A-side cover, the 8B-upper cap, 9-peristome, 10-motor, the 11-heat exchanger, 12-cooling fan, 13-hydraulic pump, the 14-hood, 16-hinge, 17-seal member, 18-handle, 21-are opened maintenance means (maintaining body opens the door), 22-pole, 23-pivot connection (cardinal extremity one side), 24-has step roller (front end one side), 25-motion track, 26-support, 27-props up rod guide, the 28-guide-track groove, 28A-linearity rail portion, 28B-V shape rail portion, 28B1-first bend, 28B2-second bend.

The specific embodiment

The Work machine that makes embodiment of the present invention that develops simultaneously with reference to the accompanying drawings is applicable to that the situation of hydraulic crawler excavator is that example is elaborated.

Here, Fig. 1 to Figure 11 represents first embodiment of the invention.Among the figure, mark 1 is the hydraulic crawler excavator as Work machine, and the roughly formation of this hydraulic crawler excavator 1 comprises: the crawler type lower running body 2 that can walk automatically as shown in Figure 1; Be loaded into the top rotor 3 on this lower running body 2 rotationally; And movably be arranged at the apparatus for work 4 of the front portion of this top rotor 3 up and down for carrying out the digging operation of sand etc. for example.

Under this situation, the top rotor 3 and the lower running body 2 of hydraulic crawler excavator 1 together constituted the car body of Work machine.And top rotor 3 is made of rotating frame 5 described later, driver's cabin 6, counterweight 7, roof system 8, motor 10 and hood 14 etc.In addition, the overall width of top rotor 3 is set to the size W shown in Fig. 2, and roof system 8 described later is the compact formation in less ground in this size W scope.

Mark 5 is the rotating frames that constitute the supporting structure (framework) of top rotor 3, and this rotating frame 5 is faced upward in its front side to bow apparatus for work 4 movably is installed, and at its rear side counterweight 7 described later is installed.

Mark 6 be configured in rotating frame 5 anterior left side take the driver's cabin of portion as the operator, this driver's cabin 6 portion within it forms pulpit, and disposes driver's seat that the operator takes, control stick, guidance panel (all not shown) etc.

Mark 7 is the counterweights that are provided with in the rear end of rotating frame 5 side, and this counterweight 7 releasably is equipped on rear end one side of rotating frame 5, and realizes the weight balancing of top rotor 3 integral body with respect to the apparatus for work 4 of front side.In addition, the front side of counterweight 7 is provided with the roof system 8 that holds aftermentioned motor 10 grades.And, the top 7A of counterweight 7 as shown in Figure 3 general configuration with the identical substantially face of upper cap 8B described later on (height and position).

Mark 8 is between driver's cabin 6 and counterweight 7 and is located at roof system on the rotating frame 5 with erecting, and this roof system 8 uses as shown in Figure 4 a plurality of metal sheets such as steel plate to form as Fig. 1, and portion forms the Machine Room within it.And roof system 8 erects side cover 8A, the 8A of setting by the left and right sides at rotating frame 5 and the upper cap 8B that is provided with on the top of this each side cover 8A etc. constitutes.

Mark 9 is the peristomes that become the inspection hole that is provided with on the upper cap 8B of roof system 8, this peristome 9 as shown in Figure 4 as from above come open and close through hood 14 when checking motor 10 grades described later.And peristome 9 is positioned at the front side of counterweight 7 and forms in that the fore-and-aft direction of upper cap 8B and right and left are upwardly extending and is roughly tetragonal square hole.

Here, peristome 9 forms with respect to the eccentric configuration of a side (left side among Fig. 4) at left and right directions of the middle position of upper cap 8B, and can be beneficial to from the top maintenance, checks heat exchanger 11 the aftermentioned motor 10 and cooling fan 12 etc.And this peristome 9 is switchably covered from upside by aftermentioned hood 14.

Mark 10 is to be positioned near the counterweight 7 and as the motor of the prime mover at the place, rear portion that is located at rotating frame 5, be contained in the roof system 8 (Machine Room) with horizontal state as the double dot dash line of this motor 10 as shown in for example Fig. 2, Fig. 4, and in roof system 8, extend along left and right directions.And, having disposed the heat exchanger 11 that constitutes by for example water tank and oil cooler etc. and cooling fan 12 etc. in a side of motor 10, the opposite side of motor 10 has disposed a plurality of hydraulic pumps 13 etc.

Mark 14 is hoods of the peristome 9 of open and close roof system 8, this hood 14 is as Fig. 2 to Fig. 6, shown in Figure 8, by being roughly the rectangular upper side cover 14A of portion, being positioned at the left and right directions both sides of the 14A of this cover plate portion and the lid of expanding left side board 14B and the right side board 14C that extends, the fore-and-aft direction both sides that are positioned at the 14A of this cover plate portion and forming more flat (the shallow end) of quadrangularly to the preceding board 14D and the back board 14E of the expansion extension of oblique below to oblique below.

Under this situation, its downside position of left side board 14B of hood 14 use hinge 16 grades described later be connected in rotationally roof system 8 (upper cap 8B) above.Like this, hood 14 is with hinge 16 switch as rotating fulcrum and upwards, and at this moment, right side board 14C becomes free end, and dipping and heaving as shown in Figure 4.

In addition, when hood 14 is closed as Fig. 2, as shown in Figure 3, left side board 14B, right side board 14C and before board 14D etc. contact with the top of upper cap 8B by aftermentioned seal member 17 etc., and back board 14E contacts with the top 7A of counterweight 7 by seal member 17 etc.Like this, the hood 14 of closed condition prevents that foreign matter such as rainwater, dust for example from entering in the roof system 8 from the peristome 9 of upper cap 8B.

Here, hood 14 disposes in left and right directions one side (left side among Fig. 2 one Fig. 4) off-centre of upper cap 8B for the peristome 9 of open and close roof system 8.And the length of hood 14 (left and right directions size) is compared with the overall width (size W) among Fig. 2, makes little of for example 1/3～1/4.

Like this, the weight saving of hood 14, the operator who carries out upkeep operation can hold aftermentioned handle 18 and easily open hood 14.In addition, the right side board 14C of hood 14 go up and upper cap 8B between be provided with retaining mechanism (not shown), this retaining mechanism becomes when cutting out the peristome 9 of roof system 8 with hood 14, and hood 14 is remained closed condition, and as required and locking formation.

On the other hand, be provided with aftermentioned regularly with methods such as welding between the 14A of cover plate portion of hood 14 and the preceding board 14D and prop up rod guide 27.And, when opening hood 14, by making guide-track groove 28 slide displacements of pole described later 22, and after being opened to maximum open position shown in Figure 6 by pole 22, hood 14 remains in open position shown in Figure 8 by its deadweight Wg along a rod guide 27.

In addition, the center of gravity G of hood 14 (position of centre of gravity), in Fig. 6 and the illustrated maximum open position of Fig. 7 (position of open angle θ 1), be than motion track described later 25 positions slightly in the outer part, and be disposed at than the 28B of V-way portion of guide-track groove 28 by under the position.And the deadweight Wg of hood 14 acts on this center of gravity G, and this deadweight Wg is decomposed into longitudinal component Wgl and two axial components of cross stream component Wg2 as shown in Figure 7.Therefore, hood 14 is subjected to the power of closing direction because of the cross stream component Wg2 of deadweight Wg.

Mark 15 is to be used for hinge 16 is installed to installing plate on the left side board 14B of hood 14, this installing plate 15 is by for example forming into about コ shape the metal sheet roof covering bending as shown in Figure 5, and uses method such as welding to be fixed on the left side board 14B (medial surface) of hood 14.And installing plate 15 is installed on aftermentioned hinge 16 on the board 14B of left side securely when the inboard strengthens the left side board 14B of hood 14.

Mark the 16, the 16th switchably is connected to hood 14 hinge on the upper cap 8B of roof system 8, and these hinges 16 are made of the fastening means that for example cardinal etc. constitutes.And hinge 16 is rotatably installed on as Fig. 2～Fig. 6, as shown in Figure 8 between the installing plate 15 of the upper cap 8B of roof system 8 and hood 14, and constitutes switch motor and cover 14 o'clock fulcrum (center of rotation).

Mark 17 is seal members set below hood 14, sealing parts 17 are installed on as shown in Figure 5 on the following integral body (below left side board 14B, right side board 14C, preceding board 14D and the back board 14E) of hood 14, and will be in the upper cap 8B around the peristome 9, sealing between 7A and the hood 14 above the counterweight 7.

Mark 18 is that the 14A of cover plate portion that is fixed in hood 14 goes up and the handle that is provided with, this handle 18 as Fig. 2, is installed on the central portion (centre position of fore-and-aft direction) of the 14A of cover plate portion as shown in Figure 3 in the board 14C position, right side of close hood 14.And, the operator who carries out upkeep operation etc. with singlehanded hold handle 18 in by being that rotating fulcrum lifts hood 14 and carries out opening door operation with hinge 16.

Mark 19 is to be positioned at the right side of roof system 8 as shown in Figure 2 and to be located at operating oil tank on the rotating frame 5, and this operating oil tank 19 makes the oil that returns from fluid pressure governor (not shown) circulate in the suction side that is connected to above-mentioned hydraulic pump 13.In addition, the front side of operating oil tank 19 is provided with the fuel tank 20 etc. that is used for supplying with to above-mentioned motor 10 fuel.

Mark 21 is the maintaining bodies of opening as the maintenance means of opening that adopt in the present embodiment, this is opened maintaining body 21 and is made of an aftermentioned pole 22 and rod guide 27 grade of Fig. 4～shown in Figure 10, and hood 14 is locked among Fig. 8 the holding position of opening shown in the solid line.And, open maintaining body 21 in the preceding board 14D side of hood 14 and be installed between the upper cap 8B and hood 14 of roof system 8 by what a pole 22 and a rod guide 27 constituted.

Mark 22 is the poles that are rotatably installed on the upper cap 8B of roof system 8, and the slender rod shaped body of this pole 22 by formations such as for example iron and steel rods bends as shown in figure 10 and form.And, being provided with pivot connection 23 in cardinal extremity one side of pole 22, this pivot connection 23 is being connected on the aftermentioned support 26 under the state that prevents to extract rotationally.In addition, free-ended front end one side that becomes pole 22 is provided with along what aftermentioned propped up that the guide-track groove 28 of rod guide 27 slides a step roller 24.

Here, pole 22 has the effective length corresponding with the radius R shown in Fig. 5～Fig. 7, and rotates with 23 centers, pivot connection.And, front end one side (step roller 24 is arranged) of pole 22 as Fig. 5, Fig. 6 and shown in Figure 8 as when hood 14 carried out switching manipulation, thereby dipping and heaving is depicted the circular-arc motion track 25 that is radius R thereupon.

Mark 26 is the supports that support front end one side of pole 22 rotationally, this support 26 be positioned at peristome 9 around (front side of fore-and-aft direction) and as shown in Figure 5 as be fixed on the top 8B of roof system 8 with bolt etc.And support 26 is disposed at the leftward position place than described later rod guide 27 more close hinges 16 when making hood 14 be in closed condition as shown in Figure 5.

In addition, support 26 is disposed at clutch page or leaf 16 to the right on the position of preliminary dimension L with the pivot connection 23 of pole 22.Like this, when hood 14 being opened among Fig. 8 the open position shown in the solid line, pole 22 is configured to the state that surpasses upright position (top position of support 26) and tilt to the direction opposite with hinge 16 sides, and front end one side (step roller 24 is arranged) of pole 22 articulates with respect to the aftermentioned second bend 28B2 because of deadweight.

Mark 27 is in the set rod guide of the preceding board 14D side of hood 14, this rod guide 27 forms by for example sheet metals such as steel plate being carried out bending process as shown in figure 10, and has horizontal plate part 27A and the vertical plate part 27B that extends on the length direction of hood 14.And, penetratingly be provided with the aftermentioned guide-track groove 28 that extends more longways on the vertical plate part 27B of a rod guide 27, and formed the bend 27C, the 27D that are the eaves shape bently with different height at the upper end of vertical plate part 27B one lateral bending.

Here, propping up rod guide 27 covers both sides ground, bight and is provided with between the 14A of cover plate portion of hood 14 and preceding board 14D.That is, the end edge portion of rod guide 27 its horizontal plate part 27A is connected to the preceding board 14D of hood 14 with methods such as welding, and the following and preceding board 14D of horizontal plate part 27A below be configured in the same plane of cardinal principle (coplane).In addition, the vertical plate part 27B that props up rod guide 27 with its bend 27C, 27D the medial surface that contacts the 14A of cover plate portion highlightedly (below) state under welding.

Like this, propping up rod guide 27 is fixed in the hood 14 to extend abreast substantially along preceding board 14D.And a rod guide 27 is configured in the hood 14 so that facial to the right 14C extends from length direction (left and right directions of the vehicle) centre position of hood 14.

Mark 28 is the long guideway grooves that are provided with on the vertical plate part 27B of rod guide 27, and this guide-track groove 28 forms on the thickness of slab direction of a rod guide 27 and penetratingly is provided with, and the elongated slot that slenderly extends from the length direction one side direction opposite side of a rod guide 27.In addition, guide-track groove 28 have with pole 22 the corresponding substantially width dimensions of step roller 24 arranged, and front end one side (step roller 24 is arranged) of pole 22 is guided along the length direction of guide-track groove 28 slidably.

Here, for hood 14 is guided according to the open-angle of hood 14 front end one lateral root of pole 22 when open position opens from fastening position from length direction one side direction opposite side, the 28B of V-way portion that the long linearity rail portion 28A that guide-track groove 28 is extended by linearity ground on the length direction of a rod guide 27 forms with being positioned at this linearity rail portion 28A opposite side and v-shaped bending constitutes.And the 28B of this V-way portion directs into front end one side of pole 22 the maximum open position place of hood 14 and is locking state because of the deadweight Wg (cross stream component Wg2) of hood 14 articulates pole 22.

Promptly, the first bend 28B1 that the set 28B of V-way portion is extended agley by the motion track of describing along front end one side of pole 22 from the opposite side position of linearity rail portion 28A for the maximum open position that front end one side of pole 22 is directed into hood 14 from the opposite side position of linearity rail portion 28A 25 on the guide-track groove 28 of rod guide 27 and crooked and articulate second bend 28B2 formation in the side radially outward of motion track 25 into locking state because of the deadweight Wg of hood 14 makes front end one side of pole 22 from the front end of this first bend 28B1.

Under this situation, it is crooked and form that the first bend 28B1 that constitutes the V-way 28B of portion is roughly " ㄑ " shape ground with respect to linearity rail portion 28A with the angle [alpha] (for example, 130～140 degree) as the obtuse angle as shown in Figure 11.In addition, the second bend 28B2 is roughly the bending of V-arrangement ground with respect to the first bend 28B1 with the angle beta (for example 85～95 degree) that is roughly the right angle and forms.

And, the first bend 28B1 makes pole 22 when as Fig. 6, as shown in Figure 7 hood 14 being opened to maximum open position (position of open-angle θ 1) front end one side is that the motion track 25 of R is guided glibly along radius, and further moves to opening direction with the ends restrict pole 22 of the first bend 28B1 when maximum at the open angle (open-angle θ 1) of hood 14.

In addition, the end from the first bend 28B1 as the second bend 28B2 forms as shown in figure 11 is roughly the crooked shape in V-arrangement ground, and extends to the radial outside of motion track 25 with respect to the first bend 28B1.And, when operator under the state that hood 14 is opened up into the maximum open position shown in the solid line among Fig. 6, Fig. 7 (position of open-angle θ 1) with hand when hood 14 leaves (power that direction is opened in releasing), the second bend 28B2 is allowing hood 14 to begin when closing direction moves it to be articulated be locking state by front end one side of pole 22 being directed into the second bend 28B2 as shown in Figure 8 because of deadweight Wg (cross stream component Wg2).

Under this situation, when hood 14 being opened up into the illustrated maximum open position of Fig. 6, Fig. 7 (position of open-angle θ 1), the 28B of V-way portion of guide-track groove 28 is configured in the center of gravity G (position of centre of gravity) of ratio engine lid 14 by last position.Therefore, with the front end one side utilization of pole 22 deadweight and from the first bend 28B1 when the second bend 28B2 articulates, can stably keep this to articulate state (locking state).

In addition, on the guide-track groove 28 in the way of linearity rail portion 28A the position penetratingly be provided with large diameter roller insertion section 28C.And, when will the front end one side setting of pole 22 have step roller 24 (with reference to Figure 10) in guide-track groove 28, to install slidably the time, there is step roller 24 to insert, like this, will has step roller 24 to remain to prevent the state of extracting with respect to guide-track groove 28 by roller insertion section 28C.

Promptly, assembling (or decomposition) when opening maintaining body 21, under the state of the aligned in position that makes step roller 24 and roller insertion section 28C, to there be step roller 24 to insert in the roller insertion section 28C (or in the 28C of roller insertion section, extracting), and will has step roller 24 to be installed to (or from guide-track groove 28, unloading) in the guide-track groove 28.

The hydraulic crawler excavator 1 of present embodiment has above-mentioned formation, below its action is described.

At first, if the operator who takes operates start button and starts motor 10 in the roof system 8, then drive hydraulic crawler excavators 13 etc. in the driver's cabin 6 of hydraulic crawler excavator 1 by this motor 10.And, by the operator control stick in the driver's cabin 6 etc. is suitably shaken operation, the pressure fluid of self-hydraulic pump 13 supplies in each hydraulic cylinder of apparatus for work 4, the hydraulic electric motor of rotation usefulness or the walking usefulness hydraulic electric motor (all not shown) of lower running body 3 etc. or from its discharge in the future, carries out digging operations such as native sand.

In addition, when the maintenance of set motor 10, heat exchanger 11 and cooling fan 12 etc. in carrying out roof system 8, inspection, hold handle 18 and lift the opening operation of carrying out hood 14 with singlehanded by the operator.Under this situation, be the open upward while of fulcrum with hood 14 with hinge 16 only, can in Fig. 8, Fig. 9, locating the holding position of opening of the open-angle θ shown in the solid line 2 by opening maintaining body 21 lockings (articulating) with one-handed performance.

Promptly, the operator only with one-handed performance with hood 14 when fastening position opens up into open position, the side of the linearity rail portion 28A that front end one side (step roller 24 is arranged) of pole 22 is extended from linearity on its length direction in the set guide-track groove 28 on rod guide 27 is guided opposite side, and pole 22 is motion track 25 undulatory motions of R along the radius shown in Fig. 5～Fig. 9.

And, if further continue the opening operation of hood 14, then front end one side (step roller 24 is arranged) of pole 22 arrives the first bend 28B1 of guide-track groove 28 (28B of V-way portion), and can be come as Fig. 6, as shown in Figure 7 pole 22 front ends one side to be guided glibly along motion track 25 by the first bend 28B1.And, when the open angle that becomes hood 14 is the maximum open position of open-angle θ 1, can limits civilian bar 22 by the end of the first bend 28B1 and move to opening direction.

Then, under this state (maximum open position shown in the solid line among Fig. 6, Fig. 7), if the operator with hand from hood 14 (handle 18) thus leave the power open direction of removing, then hood 14 begins to move to closing direction because of deadweight Wg (cross stream component Wg2), so front end one side (step roller 24 is arranged) of pole 22 is guided in the second bend 28B2 from the first bend 28B1 as Fig. 8, as shown in Figure 9, and front end one side of pole 22 can be articulated for locking in the second bend 28B2 automatically.

Under this situation, when hood 14 being opened up into Fig. 6, maximum open position (position of open-angle θ 1) shown in Figure 7, the center of gravity G of hood 14 is positioned at the position slightly more outer than motion track 25, and be disposed at than the 28B of V-way portion of guide-track groove 28 by under the position.

Therefore, with front end one side (step roller 24 is arranged) of pole 22 because of deadweight from the first bend 28B1 when the second bend 28B2 articulates, can stably keep this to articulate state (locking state), and can eliminate open mode unfavorable conditions such as (locking states) because of external force false dismissal hoods 14 such as for example wind.

In addition, when carrying out above-mentioned opening operation, hood 14 is only replied Δ θ (Δ θ=θ 1-θ 2) from the maximum open position of open-angle θ 1 to the holding position of opening of open-angle θ 2.But this angle delta θ can be suppressed be the low-angles of 2～3 degree, and the open-angle θ 2 that opens the holding position can be set at the big open angles of 74～75 degree for example and can guarantee big open-angle θ 2.

Like this, open maintaining body 21 and hood 14 lock onto among Fig. 4 and open the place, holding position shown in the double dot dash line, peristome set on upper cap 8B 9 can be opened to the outside significantly by using by what a pole 22 and rod guide 27 grade constituted.And also easily heat exchanging device 11 and cooling fan 12 etc. keep in repair (maintenance, inspection) operation can under this state peristome 9 to be used as inspection hatch.

Especially, when handling operation of the used Air Filter of the water tank that carries out heat exchanger 11 etc., need sometimes hood 14 is remained the state of opening significantly.But, owing to can (for example be set at big open angle as the open-angle θ 2 that will open the place, holding position as above-mentioned, 74～75 degree), so can stably carry out maintenance, inspection (maintenance) operation under the open mode of hood 14, carried out, and in the burden that can alleviate the operator who accompanies with upkeep operation, improve operation, safety etc.

In addition, when after upkeep operation finishes, making hood 14 from the holding position of opening shown in Figure 8 when getting back to closing direction, hood 14 is lifted slightly to maximum open position with singlehanded by the operator, front end one side that can make pole 28 moves to the first bend 28B1 from the second bend 28B2 of guide-track groove 28.

And, at this moment, hold pole 22 and make front end one side of pole 22 force to move to linearity rail portion 28A with singlehanded by the operator from the first bend 28B1, can remove the state that articulates of pole 22, then, front end one side direction linearity rail portion 28A one side slip displacement by making pole 22 can make hood 14 get back to the fastening position shown in Fig. 5.

Like this, according to present embodiment, the guide-track groove 28 that is made of long linearity rail portion 28A and the 28B of V-way portion is set opening on the rod guide 27 of maintaining body 21, and the warp architecture that bends of the circular arc motion track 25 described along front end one side of pole 22 from the opposite side position of linearity rail portion 28A for its first bend 28B1 of the structure that adopts of the 28B of this V-way portion.

Thereby, when the operator carries out opening operation to hood 14, the front of pole 22 can be directed into its open angle glibly along motion track 25 and be maximum position (position of open-angle θ 1), when open angle is maximum, can further move by first bend 28B1 restriction pole 5 to opening direction.

And, after hood 14 is opened up into maximum open position, even the operator leaves the handle 18 of hand from hood 14, begin to move because of deadweight by hood 14 to closing direction, can make front end one side of pole 22 be articulated to the second bend 28B2 of a rod guide 27 (28B of V-way portion), and when can locking the moving of pole 5, hood 14 can be articulated at this moment and remain open mode (position of open-angle θ 2).

Therefore, according to present embodiment, the operator who carries out the switching manipulation of hood 14 can only remain open mode with one-handed performance with hood 14, and can alleviate the operator's who carries out opening operation burden conscientiously.

And, by guide-track groove 28 28B of V-way portion (first, second bend 28B1,28B2) is set in a rod guide 27, can make open-angle θ 2 when hood 14 remained open mode big near for example angles of 75 degree, and can stably carry out maintenance, the inspection (upkeep operation) of the motor 10 that holds in the roof system 8 etc.Like this, operator's burden can be alleviated, and the operation when safeguarding can be improved.

Have, in the above-described embodiment, lifting the situation that guide-track groove 28 that linearity rail portion 28A and the 28B of V-way portion are constituted is located on the civilian rod guide 27 is that example describes again.But the present invention is not limited to this, also can replace guide-track groove for example and adopts the formation with identical shaped substantially guide-track groove, guide rail or guide rail teat etc. is set.

In addition, in the above-described embodiment, switch motor was covered 14 o'clock on the upper cap 8B of roof system 8, and lifting the situation that the direction that opens it is made as the left and right vehicle wheel direction is that example describes.But the present invention is not limited to this, for example can adopt becoming and make the make progress formation of switch of hood on the forward and backward direction of vehicle.

In addition, in the above-described embodiment, institute's act hydraulic crawler excavator is that example describes as Work machine.But the present invention is not limited to this, can be widely used in the inspection that engineering machinery such as crane, wheel loader, fork truck for example or Transport Machinery etc. will be located at roof system top and make the several work machinery that carries out the structure of switch with hood with peristome.

Claims (3)

1. a Work machine possesses: the framework that is provided with the car body of apparatus for work; Be loaded into the motor on this framework; Setting is arranged on the said frame and marks off the Machine Room that holds this motor in inside and the roof system that is provided with peristome on top; Switchably be located on this roof system to cover the hood of this roof system peristome; And, be located between above-mentioned roof system and the hood and make this hood remain the maintaining body of opening of open mode when this hood upwards opened, it is characterized in that:

The above-mentioned maintaining body of opening is made of a pole and a rod guide, cardinal extremity one side of pole is installed in rotation on the above-mentioned roof system and makes front end one side depict circular-arc moving rail slash along with the switching manipulation of above-mentioned hood and rises and falls, and a rod guide is arranged on the above-mentioned hood and guides front end one side of above-mentioned pole along with the switching manipulation of this hood;

This rod guide has: the linearity rail portion, its make above-mentioned hood from fastening position when open position is opened, front end one lateral root of above-mentioned pole is come side direction opposite side linearity guiding from length direction according to the opening angle of above-mentioned hood; V-way portion, the opening angle that its opposite side position in this linearity rail portion forms V-arrangement and front end one side of above-mentioned pole directed into above-mentioned hood articulates for the maximum open position of maximum and by the deadweight of above-mentioned hood and is locking state.

2. Work machine according to claim 1 is characterized in that:

The structure of the V-way portion of above-mentioned rod guide comprises: first bend, for the above-mentioned motion track bending that the maximum open position that front end one side of above-mentioned pole is directed into above-mentioned hood from the opposite side position of above-mentioned linearity rail portion is described along front end one side of above-mentioned pole from the opposite side position of above-mentioned linearity rail portion is extended; Second bend articulates front end one side of above-mentioned pole from the front end of this first bend in the radially outward crooked of above-mentioned motion track and the deadweight by above-mentioned hood and is locking state.

3. Work machine according to claim 1 and 2 is characterized in that:

The structure that above-mentioned hood adopts is: with the center of gravity of this hood be configured in than the V-way portion of above-mentioned rod guide by under the position when hood is opened to maximum open position, to move to closing direction because of deadweight.

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