CN100447352C - Cab of construction machinery - Google Patents

Abstract

The present invention relates to an engineering machinery used operator cabin which is suitable for forming the operating rooms such as hydraulic excavator, hydraulic crane and the like. The invention provides an engineering machinery used operator cabin which can restrain the back space deformation in the operator cabin under the conditions that the vehicle are overturned and has sufficient rigidity to protect the inner operator. The operator cabin is composed of the left and right upper extending components (29 and 30) which are arranged at the left and right cylinders (27 and 28) at the roof plate side of the operator cabin (12) and extends backward; and the left and right connecting components (31 and 32) that connects the back end side of the upper extending component to the upper end side of the left and right back cylinders (24 and 25). Besides, the left and right connecting component uses casing or forging method to form the solid beam component. Furthermore, the transverse beam components (33 and 34) which are connected on the connecting component with welded connection by the two end sides that space in the front and back direction and extend to the left and right directions are arranged between the connecting components.

Description

Cab of construction machinery

Technical field

The present invention relates to a kind of being applicable to and form for example cab of construction machinery of the operating room of hydraulic crawler excavator, hydraulic crane etc.

Background technology

Usually, engineering machinery such as hydraulic crawler excavator are, on the upper rotating body that is equipped on pivotally on the bottom traveling body drivers' cab are set, and are made of the structure of boarding operator's etc. operating room this drivers' cab.

The cab of construction machinery of this conventional art is by the facial box shape that forms general square shape of last face, front face, rear face and left and right side.And, for example left and right side face etc. is formed on the inner structure (for example with reference to patent documentation 1-TOHKEMY 2001-182098 communique) that constitutes the spatial portion of post portion for being engaged with the state that overlaps by interior plate and the outer panel that for example steel sheet constitutes.

In addition, as other conventional art, known have joint by using mo(u)lding system etc. will interconnect the structure (for example with reference to patent documentation 2-TOHKEMY 2000-198469 communique) of the cab of construction machinery that constitutes cage construction to a plurality of tubing that front and rear direction and left and right direction are extended.

In addition, the cab of construction machinery of this situation is that left and right forward cylinder, left and right rear cylinder and left and right top cylinder five equilibrium are not formed by the metal tube of steel, connect the structure of also using the joint of cast member system to be connected simultaneously between rear cylinder and the top cylinder between these forward cylinder and the top cylinder with the joint of cast member system.

In above-mentioned conventional art (patent documentation 1), owing to used the interior plate that constitutes by steel sheet, outer panel etc. to form drivers' cab, so, have the advantage of the appearance design that can improve the drivers' cab of using as engineering machinery, shaping processability etc.But, has the problem that is difficult to guarantee its intensity as drivers' cab because in this case interior plate, outer panel are formed by steel sheet.

In addition, under the situation of above-mentioned conventional art, also adopted following countermeasure, by above-mentioned interior plate is engaged with the state that overlaps with outer panel, form the spatial portion that the post portion of hollow constitutes in inside, and in this spatial portion, stiffener etc. is set, improve as the intensity of drivers' cab etc.

But owing in inside stiffener is set, the spatial portion that needs the post portion of hollow to constitute is bigger.And, if the external dimensions of drivers' cab is limited in the scope of specification, above-mentioned post portion (spatial portion) will stretch out to the inboard of drivers' cab, so the usage space stenosis in the drivers' cab, be difficult to guarantee sufficient space and operational stability etc. as cab of construction machinery.

On the other hand, the conventional art of patent documentation 2 is, by using joint to interconnect respectively, be assembled into the structure of the cab of construction machinery that constitutes skeleton structure by a plurality of duct members that left and right forward cylinder, left and right rear cylinder and left and right top cylinder etc. constitute.

But; in the case; because only for assembling the engineering that the constitutes skeleton structure structure of machinery with drivers' cab by using joint that a plurality of pipe fittings are interconnected structure; so; when being applied in bigger external force when vehicle overturning for example etc.; there is the problem must fully implement to be used to protect built-in function person's Security Countermeasures in the possibility that the drivers' cab breakage is arranged.

Summary of the invention

The present invention is the scheme that proposes in view of the problem in the above-mentioned conventional art; its objective is provide a kind of when vehicle overturning for example etc. under the situation, can suppress the back space distortion in the drivers' cab, have sufficient rigidity to protect inner operator's cab of construction machinery.

In addition, another object of the present invention provides a kind ofly can guaranteed at beyond from the abundant intensity of the shock loading of outside, rigidity, can also improve the space in the drivers' cab and the cab of construction machinery of operational stability.

In order to solve the problems of the technologies described above, the present invention is applicable to the cab of construction machinery with following each several part: form the roughly downside pedestal framework of tetragonal framework of conduct; From the front of this pedestal framework left, right is left at interval and the upwards upright left and right forward cylinder that is provided with; From the rear end side of said base framework left, right is left at interval and the upwards upright left and right rear cylinder that is provided with; Left, right is left at interval and backward directions are extended, and is connected the left and right top cylinder on the upper end side of above-mentioned each forward cylinder with the upper end side with each rear cylinder.

And according to the invention of scheme 1, its architectural feature is the left and right parts that prolong that above-mentioned left and right top cylinder is provided with to extension towards the rear by the upper end side from above-mentioned each forward cylinder; Use casting or forging method to form solid beam parts, the left and right link that the rear end side of prolonging parts on this is connected the upside of above-mentioned each rear cylinder constitutes, between this left and right link, be provided with a plurality of beam parts, these a plurality of beam parts leaving on the fore-and-aft direction at interval left, right is extended and both end sides by solder joints on this left and right link.

In addition, according to the invention of scheme 2, above-mentioned beam part uses the pipe fitting of hollow structure to make.In addition, according to the invention of scheme 3, on above-mentioned left and right link, form the fitting portion of the both end sides of chimeric above-mentioned beam part.

On the other hand, invention according to scheme 4, between above-mentioned cylinder and rear cylinder, be provided with at least one side's side of the left and right direction that is positioned at the said base framework and the upwards upright middle cylinder that is provided with, the upper end side of this centre cylinder by solder joints on above-mentioned link.

In addition, according to the invention of scheme 5, below above-mentioned link, form the fitting projection on the upper end side of giving prominence to and being entrenched in above-mentioned middle cylinder downwards.

In addition, invention according to scheme 6, between the cylinder, be provided with at least one side's side of the left and right direction that is positioned at the said base framework and the upwards upright middle cylinder that is provided with in above-mentioned cylinder and back, the upper end side of this centre cylinder is prolonged on the parts on above-mentioned by solder joints.

In addition, according to the invention of scheme 7, in the middle of above-mentioned the upper end of cylinder with above-mentioned on prolong between the parts, be provided with by the joint component of welding both joints.

In addition, according to the invention of scheme 8, above-mentioned left and right forward cylinder and the above-mentioned parts that prolong on left and right use the pipe fitting that constitutes hollow structure to make respectively.

The effect of invention

As mentioned above, invention according to record in the scheme 1, because being positioned at the left and right top cylinder of the top board side of drivers' cab prolongs parts and will be somebody's turn to do the left and right link that the rear end side of prolonging parts is connected the upper end side of left and right rear cylinder and constitute by extend be provided with left and right towards ground, rear from the upper end side of left and right forward cylinder, so, can by link will on prolong parts the upper end side of rear end side and rear cylinder between be connected securely.And because this link forms solid beam parts by casting or forging method, so, also can guarantee full intensity even its area of section is little.In addition, because between left and right link, be provided with will leave on the fore-and-aft direction compartment of terrain left, the right both end sides of extending is by a plurality of beam parts of solder joints on left and right link, so, use these beam parts can improve the rigidity at (rear, top of drivers' cab) between the left and right link, guarantee full intensity.

Thereby; the distortion that the shock loading from the outside of generations causes when the top rear space in the drivers' cab that is provided with around the head that is seated at the operator of operation on the seat can suppress for example in the vehicle overturning etc. can have sufficient rigidity and protect the interior operator of drivers' cab.In addition, form the drivers' cab that skeleton structure is assembled by pedestal framework, forward cylinder, rear cylinder, top cylinder and beam part etc., except can be at guaranteeing from shock loading of outside etc. abundant intensity, the rigidity, can also in drivers' cab, form bigger space, can enlarge the interior space of drivers' cab, improve operational stability etc.

In addition, the invention of scheme 2 records is because beam part uses the pipe fitting of hollow structure to form, so, the stretch process that can use pipe fitting for example etc. forms beam part at an easy rate, in the weight that can alleviate beam part, can guarantee full intensity.

In addition, invention according to scheme 3 records, owing on left and right link, form the fitting portion of the both end sides of chimeric beam part, so, can be embedded in the both end sides of beam part under the state on the left and right link, on both fitting portions, carry out weld job, thereby can improve the bond strength of link and beam part reliably.

On the other hand, invention according to scheme 4 records, owing between cylinder and rear cylinder, be provided with at least one side of the left and right direction that is positioned at the pedestal framework and the upwards upright middle cylinder that is provided with, so, upper end side by will this centre cylinder is bonded on the link with welding method, can improve intensity, the rigidity of link by the end of middle cylinder from downside support and connection parts.And, can on this centre cylinder, install and be used for the operator and pass in and out door in the drivers' cab, the sufficient holding strength in the middle of can giving on the cylinder open and close door.

In addition, invention according to scheme 5 records, because the fitting projection in the middle of side is formed with and gives prominence to downwards and be entrenched in below link on the upper end side of cylinder, so, under the state in the middle of can being entrenched in the fitting projection of link on the upper end side of cylinder, fitting portion with both is carried out weld job, thereby can further improve the bond strength of middle cylinder and link.

In addition, the invention of scheme 6 records, since adopt will be arranged at the middle cylinder between forward cylinder and the rear cylinder upper end side by solder joints in last structure of prolonging on the parts, so, support from downside by middle cylinder in the case and prolong parts, on can improving, prolong in the intensity, rigidity etc. of parts, can be by prolonging the flexural rigidity etc. that parts improve link on this.

In addition, the invention of scheme 7 record and since adopt the upper end of middle cylinder and on prolong the structure that joint component is set between the parts, so, can by the middle cylinder that uses joint component to improve to obtain by welding and on prolong the bond strength of parts, can strengthen both bonding areas.In addition, the upper end of middle cylinder and on prolong and need not to be provided with special fitting portion etc. between the parts, can make the simple structureization of prolonging parts, improve the operating efficiency of making, adding man-hour.

In addition, the invention of scheme 8 records, since left and right forward cylinder with left and right on prolong parts use respectively the formation hollow structure pipe fitting form, so, can by hollow tube make these forward cylinder and on prolong the parts weight reduction, can with on prolong parts front be bonded on the forward cylinder upper end side and be provided with by waiting such as welding.In addition, can use pipe fitting for example stretch process etc. will on prolong parts forwardly the upper end side of cylinder be integrally formed, thereby can alleviate forward cylinder and on prolong component weight, improve intensity.

Description of drawings

Fig. 1 is the elevation of hydraulic crawler excavator that has carried the drivers' cab of the 1st embodiment of the present invention.

Fig. 2 is the elevation of the drivers' cab in the enlarged drawing 1.

Fig. 3 is for taking off the stereogram under the states such as door, window glass from drivers' cab shown in Figure 2.

Fig. 4 is the exploded perspective view of pedestal framework, forward cylinder, rear cylinder and the top cylinder etc. of drivers' cab framework.

Fig. 5 be from the exploded perspective view of the being seen drivers' cab framework in the rear of Fig. 4 opposition side.

Fig. 6 is the exploded perspective view of top cylinder in the enlarged drawing 5 etc.

Fig. 7 is the amplification profile of the being seen rear cylinder of arrow VII-VII direction from Fig. 6.

Fig. 8 is the amplification profile of the being seen middle cylinder of the arrow VIII-VIII direction from Fig. 6.

Fig. 9 is the being seen amplification profile that prolongs parts of arrow IX-IX direction from Fig. 6.

Figure 10 is the amplification profile of the being seen link of arrow X-X direction from Fig. 6.

Figure 11 is the exploded perspective view of the drivers' cab framework of the 2nd embodiment.

Figure 12 is for amplifying the exploded perspective view of top cylinder among Figure 11 etc.

Figure 13 is connected middle cylinder the amplification profile that prolongs the state on the parts for the arrow XIII-XIII direction from Figure 12 is being seen by joint.

Figure 14 be the 1st modified example forward cylinder, on prolong the exploded perspective view of parts and link.

Figure 15 be the 2nd variation forward cylinder, on prolong the exploded perspective view of parts and link.

Among the figure: the 11-drivers' cab, 12,51-drivers' cab framework, 13-pedestal framework, 22,23,52,53,22 ', 23 ', 52 ', 53 '-forward cylinder, 24, the 25-rear cylinder, 26, cylinder in the middle of the 54-, 27,28,55,56-top cylinder, 29,30,57,58,29 ', 30 ', 57 ', 58 '-on prolong parts, 31,32,59,60,31 ', 32 '-link, 31B, the 32B-fitting projection, 31C, 32C, 59B, lateral process behind the 60B-(fitting portion), 31D, 32D-center protrusion (fitting portion), 59C, lateral process (fitting portion) before the 60C-, 33,34,61, the 62-beam part, 35,63-reinforced bulkhead portion, the 64-joint component.

The specific embodiment

Below, be applicable to that with cab of construction machinery the situation in the hydraulic crawler excavator is an example, with reference to the accompanying drawings embodiments of the invention are described.

At this, Fig. 1 to Figure 10 is the 1st embodiment of the present invention.Among the figure, 1 is the hydraulic crawler excavator as engineering machinery, and this hydraulic crawler excavator 1 roughly is made of upper rotating body 4, the apparatus for work described later 8 that bottom traveling body 2, use swiveling wheel 3 rotatably carry on this bottom traveling body.

In addition, top revolving body 4 roughly by rotation framework 5, see from the rear of vehicle lift-launch the drivers' cab described later 11 in the anterior left side of this rotation framework 5, be positioned at the rear side etc. of this drivers' cab 11 and be arranged at the outer mounting cover body 6 on the rotation framework 5, the counterweight 7 that is installed on the rearward end of rotating framework 5 constitutes.

8 for but elevating movement ground is arranged on the apparatus for work of the toe lateral of upper rotating body 4, and this apparatus for work 8 carries out the device of the digging operation of the earthwork etc. for the scraper bowl 8A that uses front for example etc.In addition, can be provided with casting scraper plate 9 up and down pivotally in the front side of bottom traveling body 2.And, discharge scraper plate 9 in the casting operation of carrying out cubic metre of earth etc., be used during smooth operation etc.In addition, casting scraper plate 9 is also as the stable posture outrigger of hydraulic crawler excavator 1 (vehicle) is used.

11 are the drivers' cab on the left of the front portion that is equipped on rotation framework 5, and this drivers' cab 11 constitutes the operating room that operators take advantage of seat, and its inside is provided with driver's seat, action bars (all not shown) etc.And drivers' cab 11, is made of drivers' cab framework 12 described later, top panel 36, rear board 38, left and right side panel 39,40 and door 41 etc. to shown in Figure 5 as Fig. 2.

12 is the drivers' cab framework that constitutes the skeleton structure of drivers' cab 11, this drivers' cab framework 12 as Fig. 3 to shown in Figure 5, by formations such as pedestal framework 13 described later, forward cylinder 22,23, rear cylinder 24,25, middle cylinder 26, top cylinder 27,28 (on prolong parts 29,30, link 31,32) and beam parts 33,34.

13 is the pedestal framework that constitutes the lower portion of drivers' cab framework 12, this pedestal framework 13 is as Fig. 4, shown in Figure 5, by being arranged at the left and right rear side mounting base 16,17 that leaves the left and right installed in front pedestal 14,15 in bight, front side at interval and be arranged at the bight of rear side, the connecting frame 20,21 of left and right connecting frame 18,19 and front and back constitutes.

At this, use method such as welding to be bonded on tabular framework component 18A on the mounting base 14,16 in the left and right connecting frame 18,19 by the two ends of fore-and-aft direction at the connecting frame 18 in left side, the reinforcement 18B by the square tube shape of solder joints between centre cylinder 26 described later and mounting base 16 constitutes.And this reinforcement 18B is bonded on the upper face side of frame member 18A as illustrated in fig. 5 like that, is the parts of raising connecting frame 18 with the bond strength of intermediolateral column 26.

On the other hand, the connecting frame 19 on right side is made of the pipe fitting of square tube shape etc. in the left and right connecting frame 18,19, and the two ends of its front and rear direction use welding method etc. to engage on the mounting base 15,17.In addition, the two ends of the left and right direction of the connecting frame 20 of front side are bonded on the mounting base 14,15, and the left and right two ends of the connecting frame 21 of rear side are bonded on the mounting base 16,17.

This pedestal framework 13 is positioned at its four jiaos of sides by use mounting base 14～17 interconnects the end of connecting frame 18～21, forms as Fig. 3, roughly dimetric framework shown in Figure 5.And the mounting base 14～17 of pedestal framework 13 is installed on the rotation framework 5, to 11 damping effects of drivers' cab by vibration-proof mounting (not shown).

22,23 for being arranged on the left and right forward cylinder of front portion of drivers' cab framework 12, this forward cylinder 22,23 as shown in Figure 3, from the front of pedestal framework 13 left, right leaves that the compartment of terrain is upwards upright to be provided with.And the lower end side of forward cylinder 22,23 such as Fig. 4, shown in Figure 5 contact with the mounting base 14,15 of pedestal framework 13 or chimeric, are using welding method to be fastened on the mounting base 14,15 under this state.

At this, forward cylinder 22,23 is by will being shaped by the metal tube stretch process that for example ferrous materials etc. constitutes, its upper end side with described later on prolong parts 29,30 one or formation dividually.And, above-mentioned cylinder 22,23 have with on prolong the roughly same transverse shape of parts 29,30 (for example among Fig. 9 roughly the special-shaped hollow structure of L word shape).

24,25 for being arranged on the left and right rear cylinder at rear portion of drivers' cab 12, and this rear cylinder 24,25 is such as illustrated in fig. 3, from the rear end side of pedestal framework 13 left, right leaves that the compartment of terrain is upwards upright to be provided with.And, the lower end side of rear cylinder 24,25 such as Fig. 4, contact with the mounting base 16,17 of pedestal framework 13 or chimeric as shown in Figure 5, using welding method to be fastened on the mounting base 16,17 under this state.

At this, rear cylinder 24,25 is by will being shaped by the metal tube stretch process that for example ferrous materials etc. constitutes, and its section configuration is the convex of hollow shown in Figure 7.And, use concavo-convex chimeric and welding method etc. to be fixedly connected with link 31,32 described later in the upper end side of rear cylinder 24,25.

26 for being arranged at the middle cylinder between forward cylinder 22 and the rear cylinder 24, and this centre cylinder 26 is as Fig. 4, shown in Figure 5, and lower end side is fastened on the connecting frame 18 of pedestal framework 13; Upper end side is fastened on the link 31 described later.Promptly, middle cylinder 26 is provided with between forward cylinder 22 and rear cylinder 24 and from the length direction pars intermedia of connecting frame 18 is upwards upright.

In addition, also by being shaped by the metal tube stretch process that for example ferrous materials etc. constitutes, its section configuration is a roughly tetragonal hollow structure shown in Figure 8 to middle cylinder 26.And door 41 described later is installed on the middle cylinder 26 by side panel 39 grades.

27,28 are the left and right top cylinder between the upper end side that is arranged at the upper end side of forward cylinder 22,23 and rear cylinder 24,25, to shown in Figure 5, be provided with left and right prolongs parts 29,30 to this top cylinder 27,28 and link described later 31,32 constitutes by extending towards the rear from the upper end side of forward cylinder 22,23 as Fig. 3.In the case, prolong parts 29,30 one on or be formed at the upper end side of forward cylinder 22,23 dividually.

At this, prolong under the situation that parts 29,30 and forward cylinder 22,23 form last, can by metal tube stretch process for example will on prolong parts 29,30 and forward cylinder 22,23 is integrally formed.And, on prolong the cross section of parts 29,30 shape form the special-shaped hollow structure (for example constituting the hollow structure of beak shape) of roughly L word shape as shown in Figure 9.The methods such as rear end side use butt welding of prolonging parts 29,30 in addition, are bonded on the link 31,32 described later.

31,32 is the left and right link that constitutes the part of top cylinder 27,28, this link 31,32 uses for example method such as casting or forging formation solid beam parts as shown in Figure 6, the shape (for example shape of beak) of the abnormity that is shaped as roughly L word shape as shown in figure 10 in its cross section.

At this, under the situation of utilizing casting method to become to make relay part 31,32 to be shaped, prepare in advance in the cast steel material and injection molding mould of heating and melting state for example, form solid beam parts as shown in Figure 6.In addition, under the situation that link 31,32 is shaped, also can form by using method press moldings such as for example die forging.

In the case, be formed with outstanding fitting projection 31A, 31B downwards in the both sides, front and back of link 31 that are positioned at the left side, the upper end side of rear cylinder 24, middle cylinder 26 with chimeric state by solder bond on this fitting projection 31A, 31B.In addition, integrally formed too fitting projection 32A, 32B on the link 32 on right side, the upper end side of rear cylinder 25 with chimeric state by solder bond on the fitting projection 32A of rear side.

In addition, on opposed facing that face on the left and right direction of link 31,32, be formed with back lateral process 31C, the 32C that is arranged on fitting projection 31A, 32A upside and be arranged at center protrusion 31D, 32D on the length direction pars intermedia of link 31,32, these backs lateral process 31C, 32C constitute the fitting portion relative with beam part described later 33,34 with center protrusion 31D, 32D.

33,34 for being arranged at the beam part between the left and right link 31,32, this beam part 33,34 as shown in Figure 6, use the section that constitutes hollow structure to form as the quadrangle pipe fitting, its both end sides is entrenched on back lateral process 31C, the 32C and center protrusion 31D, 32D of link 31,32.

And, between the link 31,32 about crossbeam portion 33,34 is fastened on by welding, these links 31,32 are bonded with each other on left and right direction and integrated.In addition, beam part 33,34 leaves the compartment of terrain before and after between left and right link 31,32 and is provided with as Fig. 6 shows ground, with the common roughly tetragonal reinforced bulkhead portion 35 that forms of these links 31,32.

36 for covering the top panel of drivers' cab framework 12 upper face sides, this top panel 36 is extremely shown in Figure 5 as Fig. 3, formed by punch process by metal sheet, its and arranged on left and right sides uses method such as welding to be bonded on the top cylinder 27,28 (on prolong parts 29,30, link 31,32).

In addition, the leading section of top panel 36 is such as illustrated in fig. 3, becomes along the 36A of side cut portion of the circular-arc extension of upper side of forward cylinder 22,23.And the field of front vision that is seated at the operator on the driver's seat in the drivers' cab 11 can extend to till the position of the 36A of this side cut portion upward.

37 for being arranged at the gusset of rear end side of top panel 36, and this gusset 37 covers the welding assembly of rear cylinder 24,25, beam part 33 etc. from the outside in the rear end side of link 31,32, with (design) attractive in appearance at the upside rear portion of improving drivers' cab 12.

38 rear boards for the back side that covers drivers' cab 12, this rear board 38 also metal sheet by will be thin etc. carry out punch process and form, and its and arranged on left and right sides is waited by welding and is bonded on the rear cylinder 24,25.In addition, the lower end side of rear board 38 is bonded on the connecting frame 21 of pedestal framework 13.

39 for being arranged at the rear cylinder 24 of drivers' cab framework 12 and the side panel in the left side between the middle cylinder 26, and this side panel 39 is positioned at the rear side of door 41 described later, covers the left surface of drivers' cab framework 12.And,, door 41 shown in Figure 2 can be installed on this stage portion 39A with opening and closing at the stage portion 39A of the middle cylinder 26 in the integrally formed edge of the front of side panel 39 direction extension up and down.

40 is the right panel that covers the right flank of drivers' cab framework 12, and this side panel 40 is arranged between forward cylinder 23 and the rear cylinder 25 to ground shown in Figure 5 as Fig. 3, and its lower end side engages with the connecting frame 19 of pedestal framework 13.

41 is the door that constitutes the part of drivers' cab 11, this 41 is arranged between the forward cylinder 22 and side panel 39 in left side as illustrated in fig. 2 like that, distolaterally thereafter can be installed on the stage portion 39A of side panel 39 by hinge 42,42 (with reference to Fig. 2) like that as illustrated in fig. 3 with opening and closing.

That is, as shown in Figure 3, form between the forward cylinder 22 in left side and the side panel 39 the connecting frame 18 of pedestal framework 13 with on prolong the stopping port 43 of the drivers' cab 11 between the parts 29, door 41 these stopping ports 43 of switching shown in Figure 2.

44 for being formed at the top rear space in the drivers' cab 11 as illustrated in fig. 3, and this top rear space 44 is positioned at the top of the operation seat that is arranged on drivers' cab 11, from surrounding the head side that for example sits in the operator on the operation seat on every side.And, the spatial portion that this top rear space 44 is represented for two chain-dotted lines among Fig. 2 for example.

In addition, in drivers' cab 11, be separately installed with glass window 41 on rear board 38, left and right side panel 39,40 and the door 41, between left and right forward cylinder 22,23, windshield glass be installed.And this windshield provides broad field of front vision for the operator in the drivers' cab.

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

At first, the operator in entering drivers' cab 11 is seated under the state of operating on the seat, when for example action bars is used in promotion operation traveling, can make vehicle advance, retreat by bottom traveling body 2.In addition, when carrying out the digging operation of the earthwork,, when can making apparatus for work 8 pitching action ground action, can rotate driving upper rotating body 4 by promoting the operation task action bars.

, this hydraulic crawler excavator 1 is more in the situation of for example carrying out digging operation on the level land does not reach obliquely, vehicle (hydraulic crawler excavator 1) overturning is arranged and apply big external force on drivers' cab according to the occasion difference, can make the possibility of drivers' cab 11 breakages.And in this case, to implement sufficient Security Countermeasures are important problems for entering operators in the drivers' cab 11.

At this, according to present embodiment, adopt the left and right top cylinder 27,28 make the top board side that is positioned at drivers' cab 11 to prolong parts 29,30 and will be somebody's turn to do the rear end side of prolonging parts 29,30 and be connected the structure that the left and right link 31,32 of the upper end side of left and right rear cylinder 24,25 constitutes by extend be provided with left and right towards ground, rear from the upper end side of left and right forward cylinder 22,23.

And, for left and right link 31,32 forms solid beam parts by casting or forging method, between this link 31,32, be provided with and on fore-and-aft direction, leave at interval, left, the structure of the right both end sides of extending by the beam part 33,34 of solder joints on this connecting portion 31,32.

Therefore, can be on rear side position, the top of drivers' cab 12 form as Fig. 5, shown in Figure 6 roughly tetragonal reinforced bulkhead portion 35 by left and right link 31,32 and crossbeam portion 33,34.And the rigidity that can use crossbeam portion 33,34 to improve between the left and right link 31,32 can be guaranteed full intensity on rear side position, the top of drivers' cab framework 12.

In addition, because link 31,32 forms solid beam parts by casting or forging means, also can guarantee full intensity even its area of section is little.And, by using such link 31,32, can with on prolong between the upper end side of parts 29,30 rear end side and rear cylinder 24,25 and be connected securely.

Its result, by left and right link 31,32 and beam part, can make the top rear lateral portion of drivers' cab 11 (drivers' cab framework 12) form strong construction with roughly tetragonal reinforcement framework, can be when the overturning of for example vehicle etc. under the situation, suppress rear side position, the top distortion of drivers' cab framework 12.

That is, the operator in entering drivers' cab 11 is seated under the state of operating on the seat, and operator's head is positioned on the position of the top rear side that constitutes drivers' cab 11.Therefore, form firm structure by the top rear side that makes drivers' cab 11, can prevent in the drivers' cab 11 top rear space 44 since for example the shock loading during the vehicle overturning be out of shape, can have the interior operator of sufficient rigid protective drivers' cab 11.

In addition, because the drivers' cab framework 12 of the drivers' cab 11 of present embodiment is assembled by formation skeleton structures such as pedestal framework 13, forward cylinder 22,23, rear cylinder 24,25, top cylinder 27,28 (on prolong parts 29,30) and beam parts 33,34, also can guarantee full intensity, rigidity for the shock loading of outside etc.

And, by using the drivers' cab framework 12 that constitutes this skeleton structure, with the conventional art of using the interior plate for example constitute, outer panel etc. to form drivers' cab by steel sheet relatively, can in drivers' cab, form the space of broad, can improve drivers' cab 11 interior space and operational stability.

In addition, left and right forward cylinder 22,23 use the pipe fitting that constitutes hollow structures with on prolong parts 29,30 one or form the hollow structure (for example constituting rostriform hollow structure) of the abnormity of its transverse shape formation roughly L word shape as shown in Figure 9 dividually.

Therefore, by forward cylinder 22,23 and on prolong parts 29,30 and constitute the hollow structure of cross sections for abnormity, can improve its crooked rigidity, can form firm structure.And, can use pipe fitting for example stretch process etc. will on prolong parts 29,30 forwardly the upper end side of cylinder 22,23 be integrally formed, can alleviate forward cylinder 22,23 and on prolong parts 29,30 weight, improve intensity.

In addition, the parts that the upper end side of forward cylinder 22,23 (on prolong parts 29,30) can need not to use left, right is extended etc. will be will connect the drivers' cab framework 12 that constitutes skeleton structure between the two especially.Therefore, the field of front vision of drivers' cab 11 can extend to till the position of the 36A of side cut portion of the front that is positioned at top panel 36 for example shown in Figure 3 up significantly, can enlarge the field of front vision of operation.

In addition, because for the crossbeam portion 33,34 that connects 31,32 of links on left and right direction also is that pipe fitting by hollow structure forms structure, the stretch process that can use pipe fitting for example etc. easily forms beam part 33,34, in the weight that can alleviate beam part 33,34, can guarantee full intensity.

In addition, owing on link 31,32, form back lateral process 31C, 32C and center protrusion 31D, the 32D of the both end sides of chimeric beam part 33,34 with method such as integrally formed, so, under the state of lateral process 31C, 32C and center protrusion 31D, 32D both fitting portions are carried out weld job after can being embedded in the both end sides of beam part 33,34, thereby can improve the bond strength of link 31,32 and beam part 33,34 reliably.

On the other hand, since be forwardly between cylinder 22 and the rear cylinder 24 setting from the connecting frame 18 upwardly extending centre cylinders 26 of pedestal framework 13, so be bonded on the link 31 by upper end side that will this centre cylinder 26 with welding method, can be by the anterior end of middle cylinder 26 from downside support and connection parts 31, thus the intensity, rigidity etc. of links 31 can be improved by middle cylinder 26.

And, on this centre cylinder 26, can be used for the operator and pass in and out door 41 in the drivers' cab, cylinder 26, the sufficient holding strength of side panel 39 on open and close door 41 in the middle of can giving by installations such as side panels 39.In addition, be entrenched in by upper end side under the state among the fitting projection 31B that is formed at below the link 31, wait fitting portion to engage, the bond strength of cylinder 26 and link 31 in the middle of can further improving both by welding at middle cylinder 26.

Therefore, the drivers' cab framework 12 of the drivers' cab 11 of present embodiment can be when vehicle overturning for example etc. suppresses the distortion of the top rear space 44 in the drivers' cab 11, has the operator that enough rigidity are protected inside.And, by adopting this drivers' cab framework 12, can guarantee for beyond from the abundant intensity of the shock loading of outside, rigidity, can also enlarge space in the drivers' cab 11, improve operational stability etc.

Below, Figure 11 to Figure 13 shows the 2nd embodiment of the present invention, and in the present embodiment, the inscape identical with above-mentioned the 1st embodiment annotated with same-sign and omitted its explanation.But being characterized as of present embodiment rearward prolongs prolonging parts on the cylinder of top, uses welding method etc. that the upper end side of middle cylinder is bonded on structure on the rear end side of prolonging parts on this.

Among the figure, 51 is the drivers' cab framework that adopts in the present embodiment, drivers' cab framework 12 described in this drivers' cab framework 51 and the 1st embodiment is roughly the same, by formations such as pedestal framework 13, rear cylinder 24,25, forward cylinder described later 52,53, middle cylinder 54, top cylinder 55,56 (on prolong parts 57,58, link 59,60) and beam parts 61,62.

52,53 is the left and right forward cylinder that is arranged at the front portion of drivers' cab framework 51, and the structure of the forward cylinder 22,23 described in this forward cylinder 52,53 and the 1st embodiment is roughly the same.

54 for being arranged at the middle cylinder between forward cylinder 52 and the rear cylinder 24, and the structure of the middle cylinder 26 described in this centre cylinder 54 and the 1st embodiment is roughly the same, and its lower end side is fixedly connected on the connecting frame 18 of pedestal framework 13.But the upper end side of middle cylinder 54 in the case is bonded on by joint 64 prolongs on the parts 57 on described later.

55,56 are the left and right top cylinder between the upper end side that is arranged at the upper end side of forward cylinder 52,53 and rear cylinder 24,25, this top cylinder 55,56 as Figure 11, ground shown in Figure 12 like that with forward cylinder 52,53 one or separate formation, by prolonging parts 57,58 from the upper lateral rear extension setting of forward cylinder 52,53 left and right and link described later 59,60 constitutes.

And, on prolong described in parts 57,58 and the 1st embodiment on to prolong parts 29,30 same, can be shaped by for example stretch process metal tube.But, prolong in the case parts 57,58 form in the middle of for example crossing different with the 1st embodiment on the long part this point that extends back of the position of cylinder 54.

59,60 for constituting the left and right link of top cylinder 55,56 parts, and this link 59,60 is identical with the link 31,32 described in the 1st embodiment, uses methods such as casting or forging to form solid beam parts.But link 59,60 in the case forms short part with the state of the part of the strip that prolongs parts 57,58 on replenishing and form.

And, form outstanding fitting projection 59A, 60A downwards in the rear end side of link 59,60, on this fitting projection 59A, 60A, the upper end side of rear cylinder 24,25 is arranged by solder joints with chimeric state.In addition, on the left and right direction of link 50,60 on opposed facing side, on the position of the upside that form to constitute fitting projection 59A, 60A, form back lateral process 59B, 60B, on the position of the front that constitutes link 50,60 integrally formed before lateral process 59C, 60C.In addition, these backs lateral process 59B, 60B and preceding lateral process 59C, 60C formation are for the fitting portion of crossbeam described later portion 61,62.

61,62 for being arranged at the beam part between the link 59,60, this beam part 61,62 is identical with the structure of the described beam part 33,34 of the 1st embodiment, and back lateral process 59B, 60B and preceding lateral process 59C, the 60C of its both end sides and link 59,60 are chimeric.

And beam part 61,62 utilizes welding to be fastened between the left and right link 59,60, and it is also integrated that these links 59,60 are bonded with each other on left and right direction.In addition, such as illustrated in fig. 12 forward and backward being arranged at dividually between the left and right link 59,60 of beam part 61,62 is with the roughly tetragonal reinforced bulkhead of these links 59,60 common formation portion 63.

64 for the upper end of cylinder 54 in the middle of being arranged at and on prolong joint between the parts 57 as link, this joint 64 as shown in figure 13, lower side is entrenched on the upper end side of middle cylinder 54, constitute fitting portion 64A, on upper side, form to connect the maintaining part 64B that the state that engages keeps prolonging parts 57 from the bottom by solder joints.

And joint 64 for example forms solid link by casting or forging method, and makes above-mentioned fitting portion 64A and maintaining part 64B integrally formed.And the fitting portion 64A that joint 64 becomes downside surveys by welding and with the upper end of middle cylinder 54 down with chimeric state and engages, the fitting portion 64B of upside with the state that connects joint from downside by welding with prolong parts 57 and engage.

Therefore, in the present embodiment of this structure, by about link 59,60 and beam part 61,62, the rear side position, top of drivers' cab 51 can be made firm structure, thereby can access roughly same action effect with above-mentioned the 1st embodiment with roughly tetragonal reinforced bulkhead portion 63.

But, in the present embodiment, for will constitute top cylinder 55,56 on prolong parts and do the growth part, link 59,60 is made the structure of short part.Thus, use method such as casting or forging for example to make the link 59,60 of solid beam parts, can reduce volume with shortening, can realize alleviating of weight.

In addition, also adopt the upper end of middle cylinder 54 and on prolong the structure that is provided for the joint 4 that engages by the welding shape between the parts 57.Therefore, by use joint 64, can improve middle the cylinder 54 that obtains by welding and on prolong the bond strength of parts 57, can strengthen both bonding areas.

And, the upper end of middle cylinder 54 and on prolong between the parts 57, owing to using joint to need not to be provided with special fitting portion, in the middle of can making cylinder 54 with on prolong parts 57 simple structureization, can improve making, add the operating efficiency in man-hour.

In addition, in the present invention, because the mode that employing is supported from downside by middle cylinder 54 supports the structure of the rear end side of prolonging parts 57, so, on can improving, prolong in the intensity, rigidity of parts 57, can be by prolonging the flexural rigidity etc. that parts 57 improve links 59 on this.

In addition, in above-mentioned the 1st embodiment, having exemplified forwardly, the upper end side of cylinder 22,23 is provided with the situation of prolonging parts 29,30 integratedly and is illustrated.But the present invention is not limited to this, for example also can be as the 1st modified example shown in Figure 14, adopt form respectively forward cylinder 22 ', 23 ' and on prolong parts 29 ', 30 ', use the structure of method such as welding then with both one joints.In addition, for link 31 ' (32 '), also can be by being divided into forward and backward two-part dividing body 31a ', 31b ', (32a, 32b) formation.

In addition, in above-mentioned the 2nd embodiment, also exemplified forwardly and on the upper end side of cylinder 52,53 structure of prolonging parts 57,58 to be set integratedly and to be illustrated.But the present invention is not limited to this, and it is such also to can be the 2nd variation for example shown in Figure 15, with forward cylinder 52,53 and on prolong parts 57 ', 58 ' and form respectively, the structure of after this using means such as welding that both are engaged integratedly.

In addition, in above-mentioned the 1st embodiment, exemplified will being arranged at the situation that middle cylinder 26 between forward cylinder 22 and the rear cylinder 24 is arranged on connecting frame 18 sides of pedestal framework 13 and be illustrated.But the present invention is not limited to this, also can be the structure that other middle cylinder for example also is set in connecting frame 19 sides of pedestal framework 13.And this point for the 2nd embodiment too.

In addition, in the various embodiments described above, exemplified and used 2 beam parts 33,34 (61,52) that situation about engaging between the left and right link 31,32 (50,60) is illustrated.But the present invention is not limited to this, also can be the structure that the beam part that for example uses more than 3 engages left and right link.

In addition, in the various embodiments described above, the drivers' cab 11 that has exemplified hydraulic crawler excavator 1 as cab of construction machinery is illustrated.But the present invention is not limited to this, also uses in the drivers' cab applicable to Other Engineerings such as for example hydraulic crane machinery.

Claims (8)

1. cab of construction machinery, has the roughly downside pedestal framework of quadrangle framework of the conduct of formation, from the front of this pedestal framework left, right is left at interval and a left side of upwards uprightly establishing, the right front portion cylinder, from the rear end side of described pedestal framework left, right is left at interval and a upwards upright left side that is provided with, right back cylinder, left, right is left at interval and backward directions are extended, a left side that is connected with the upper end side of described each forward cylinder with upper end side with each rear cylinder, the upper right quarter cylinder, it is characterized in that

The left and right parts that prolong that described left and right top cylinder is provided with to extension towards the rear by the upper end side from described each forward cylinder; Use casting or forging method to form solid beam parts, the rear end side of this being prolonged parts on each is connected the left and right link formation of the upside of described each rear cylinder,

Between this left and right link, be provided with a plurality of beam parts, these a plurality of beam parts leave on the fore-and-aft direction at interval left, right is extended and both end sides by solder joints on this left and right link.

2. cab of construction machinery according to claim 1 is characterized in that, described beam part uses the pipe fitting that constitutes hollow structure to make.

3. cab of construction machinery according to claim 1 and 2 is characterized in that, forms the fitting portion of the both end sides of chimeric described beam part on described left and right link.

4. cab of construction machinery according to claim 1, it is characterized in that, between described forward cylinder and rear cylinder, be provided with at least one side of the left and right direction that is positioned at described pedestal framework and upwards upright and middle cylinder that establish, the upper end side of this centre cylinder by solder joints on described link.

5. cab of construction machinery according to claim 4 is characterized in that, side below described link is formed with the fitting projection on the upper end side of giving prominence to and being entrenched in described middle cylinder downwards.

6. cab of construction machinery according to claim 1, it is characterized in that, in described forward cylinder and rear portion between the cylinder, be provided with at least one side of the left and right direction that is positioned at described pedestal framework and the middle cylinder of upwards uprightly establishing, the upper end side of this centre cylinder is prolonged on the parts on described by solder joints.

7. cab of construction machinery according to claim 6 is characterized in that, in the middle of described the upper end of cylinder with described on prolong between the parts, be provided with by welding both articulate joint components.

8. cab of construction machinery according to claim 1 is characterized in that, described left and right forward cylinder and the described parts that prolong on left and right use the pipe fitting that constitutes hollow structure to make respectively.

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