JPH11343640A - Revolving super structure in construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a revolving super structure for a construction machine by which rigidity of a deck part of a machine body frame carrying an operator cab can be improved and a sufficient passage space for a hydraulic pipe and the like connected to a hydraulic valve and the like arranged inside the deck part can be secured. SOLUTION: A longitudinal cross section of a lateral beam member 20 in a machine body frame 17 supporting the lower rear part of an operator cab mounted on a revolving super structure is formed into a box shape. A hydraulic pipe 6 and the like connected to a hydraulic valve and the like arranged in the machine body frame 17 from an operation device and the like inside the operator cab is passed through a piping hole 28 bored in a boom mounting bracket rising plane 15 of the machine body frame 17 and through the inside of the beam member 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an upper swing body of a construction machine such as a hydraulic shovel or the like, which is relatively small.

[0002]

2. Description of the Related Art FIG. 10 is a perspective view showing a revolving upper body 1 of an all-swing type working machine disclosed in Japanese Patent No. 2659563. In the turning upper body 1 shown in FIG.
A hydraulic valve device A is provided on the left side (below the driver's seat, not shown) of the work machine mounting base in the front half of the substantially circular turning upper body 1.
The hydraulic piping 2 is guided from the valve device A to the back of the main boom 4. At this time, the hydraulic piping 2 is led out between the work implement mounting bases 5 through the pipe passage openings 3 opened in the work implement installation base 5.

FIG. 11 is a perspective view showing a frame 25 of an all-turn type working machine according to another embodiment of the prior art described in Japanese Patent Application Laid-Open No. 9-221790. In the frame 25 shown in FIG. 11, two fixing portions 25c, 25c located on the rear side of the cab (not shown) are fixed to the partition plate 33 by welding or the like.

[0004]

FIG. 10 shows a prior art full-rotation type working machine according to an embodiment of the present invention, in which a pipe passing port 3 is formed in a base 5 for mounting the working machine. Work machine mounting base 5
Are the main boom 4 and an offset boom (not shown),
A work attachment is formed by sequentially connecting the bucket boom, the bucket, and the like, and excavation work and the like are performed by the work attachment, so that a considerable load is applied. In the case where the pipe passage opening 3 is opened in the working machine mounting base 5 as in the prior art shown in FIG. 10, the rigidity of the working machine mounting base 5 is reduced, and work is performed to prevent the rigidity from lowering. It is necessary to set the plate thickness of the machine mounting base 5 to a large size. According to this, there arises a problem that unnecessary weight increase of the body occurs.

[0005] In a full-turn type working machine according to another embodiment of the prior art shown in Fig. 11, a pipe passing hole 3 is formed in the working machine mounting base 5 and the working machine mounting base 5 is provided in the same manner as in the previous case. A partition plate 33 whose one end is joined extends in the left-right direction. The partition plate 33 is a beam for increasing the rigidity of a deck portion 25F on which an operator's cab (not shown) is mounted, and further fixes a fixing portion 25C for directly supporting the operator's cab against vibration. Since the plate 33 is formed by a single plate, it is difficult to make the rigidity of the deck portion 25F sufficient, and the deck portion 25F may bend or deform and cause vibration, so that the ride comfort of the driver's cab is increased. Could be worse.

According to the present invention, there is provided a construction machine capable of improving the rigidity of a deck portion of a body frame on which a driver's cab is mounted and securing a sufficient space for passage of hydraulic pipes and the like disposed in the deck portion to hydraulic valves and the like. It is an object to provide a structure of an upper revolving superstructure.

[0007]

An upper revolving structure, a pair of uprights constituting a boom mounting bracket which is provided upright in the center front-rear direction of the upper revolving structure, and one end is joined to the uprights. A beam member extending in the left-right direction, a driver's cab disposed above the beam member on one of the left and right sides with a boom mounting bracket on the upper revolving structure interposed therebetween, and a driver member disposed in the driver's cab. The beam member is formed in a box-shaped cross section, and an opening for introducing hydraulic piping and / or a harness connected to the various operation devices into the box-shaped cross section is opened. A pipe hole is drilled in the upright plate on the side where the operator's cab is mounted, and the beam member is formed so that each side of the box-shaped cross section surrounds an outer periphery of the pipe hole. The hydraulic piping and / or harness Etc., the introduced from below the cab into the box section through the inlet, so as to derive the pair of vertical plate of the boom mounting bracket further through the pipe hole.

Accordingly, the box-shaped beam member has a structurally high rigidity, so that the cab mounting portion (usually called a deck portion) of the fuselage frame is hardly deformed or vibrated. Since the ride comfort of the driver's cab and the operability of the control device can be improved comfortably, and it is joined (by welding) so as to surround the piping hole drilled in the standing plate of the boom mounting bracket, The rigidity of the boom mounting bracket can be sufficiently maintained without increasing the thickness of the upright. Also, a hydraulic pipe extending from the deck portion to a space between the uprights of the boom mounting bracket (or a hydraulic switching valve (not shown) disposed on the deck portion opposite to the side where the operator's cab is mounted) is connected to the beam member. Since the piping holes drilled through the boom mounting bracket standing plate of the body frame are passed through the inside, the length of the hydraulic piping can be minimized and arranged neatly.

[0009] Alternatively, a box-shaped cross section may be formed with the upper revolving structure, a pair of uprights constituting a boom mounting bracket erected in the center front-rear direction of the upper revolving structure, and the uprights as one side. A side frame plate joined along the standing plate, and a driver's cab disposed above the beam member on one of the right and left sides with a boom mounting bracket on the standing plate upper revolving structure interposed therebetween. And various operating devices arranged in the cab, and an introduction port for introducing hydraulic piping and / or a harness connected to the various operating devices into the box-shaped cross section in the side frame plate. And a hole for piping is drilled in a standing plate forming the box-shaped cross section, and the hydraulic piping and / or harness and the like are connected to the box through the introduction port from below the cab. Into the mold section, and furthermore, It was to derive between a pair of vertical plate of the boom mounting brackets.

According to this, the side frame plate having a substantially L-shaped cross section is formed in the longitudinal direction of the vertical plate so as to form a box-shaped cross section so as to cover the vertical plate of the boom mounting bracket in which the piping hole is formed. Since the inlets are opened in the side frame plates, the beam members having the box-shaped cross section have high structural rigidity. The thickness can be kept sufficiently without increasing the thickness. In addition, when used in combination with the above-described configuration, when another device or the like is arranged inside the beam member and the hydraulic pipe cannot be passed, or all the hydraulic pipes are When it cannot pass through the inside, it can be dealt with by passing a pipe hole drilled in a boom mounting bracket standing plate of the body frame at a position in front of the beam member.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a main part of a hydraulic excavator 9 including an upper swing body 7 according to the first embodiment of the present invention. In the drawing, reference numeral 10 denotes a lower traveling body of a hydraulic excavator 9, 7 denotes an upper revolving body that is rotatably mounted on the lower traveling body 10, 12 denotes a work attachment that is provided on the upper revolving body 7 to be able to undulate, and 13 denotes a work. Attachment 12
Reference numeral 14 denotes a driver's cab arranged on one side (the left side in the present embodiment) of the upper swing body 7. FIG. 2 is a plan view of the excavator 9 in FIG. In the figure, reference numeral 15 denotes an upright plate (the upright plate 15 is formed as a pair of left and right) constituting a boom 13 mounting bracket, and 16 denotes a step portion used when the driver gets on and off or refuels.

FIG. 3 is a plan view of a main part showing the body frame 17 of the upper swing body 7 in FIG. In the figure, 1
Reference numeral 8 denotes a deck portion of a body frame 17 on which a cab (not shown) of the cab 14 is mounted, and 19a and 19b.
Are cab mount mounting portions formed to support a lower front portion of the cab 14, 19c and 19d are cab mount mounting portions formed to support a lower rear portion of the cab 14, and 20 is a cab mounting portion. Mount mounting part 19
Left and right beam members to which c and 19d are fixed (by welding), 21 is a mounting plate for a lower cover (not shown) of the deck portion 18, and 22 is a lower plate of the body frame 17 (the lower plate 22 is a deck portion). 18 is extended only to a part of the lower surface of the deck portion 18 for maintenance of hydraulic equipment, hydraulic piping, etc. disposed in the inside 18), and 23 is provided between the lower surface plate 22 and the beam member 20. A fixed connecting plate, 24 is a front plate fixed (by welding) between a pair of right and left standing plates 15, 25 is a swivel joint mounting portion, and 26 is a swing motor mounting portion.

FIG. 4 is an enlarged view of a portion B in FIG. In the drawing, reference numeral 6 denotes a hydraulic piping group, and 27 denotes a standing plate 15 so as to open between the standing plates 15 of the boom mounting bracket (on the side of the swivel joint mounting portion 25) and the inside of the beam member 20 having a box-shaped cross section.
The hole 28 for piping is formed in the front plate 29 of the beam member 20.
This is an inlet for introducing the hydraulic pipe opened in the beam member 20 into the beam member 20. FIG. 5 is a sectional view of the fuselage frame 17 shown in FIG.
FIG. In the drawing, reference numeral 30 denotes an L-shaped plate forming an upper surface side and a rear surface side so that the cross section in the front-rear direction of the beam member 20 becomes a rectangular box shape, and 31 denotes a bottom plate. FIG.
FIG. 5 is a view of the body frame 17 in FIG. 4 as viewed from DD.

Next, the structure and operation of the upper swing body 7 according to the first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, as shown in FIG. 2, the driver's cab 1 is deviated to the left side of the upper revolving unit 7 having a substantially circular shape (a substantially circular shape having a radius R) in plan view.
4 is disposed, and a lower front portion and a lower rear portion of the cab 14 are provided on a deck portion 1 of a body frame 17 of the upper swing body 7.
8 (shown in FIGS. 3 to 6), in the upper revolving superstructure 7 of the hydraulic excavator 9, a cross section in the front-rear direction of the beam member 20 in the left-right direction of the deck part 18 supporting the lower rear part of the cab 14 Into a box shape (front plate 29,
It is formed in an L-shaped plate 30 and a bottom plate 31 in a box shape, and is provided with an operating device (not shown, a pilot operating valve integrated with an operating lever, etc.) in the cab 14 and the like. Hydraulic piping 6 leading to a hydraulic valve (not shown) and the like arranged above is connected to a piping hole 27 formed in the upright plate 15 of the boom mounting bracket of the body frame 17, the inside of the beam member 20, and the beam Front plate 29 of member 20
Through the inlet 28 (shown in FIGS. 6 and 4).

As a result, the beam member 20 having a box-shaped cross section has a structurally high rigidity.
The deck portion 18 is hardly deformed, vibrated, and the like, so that the riding comfort of the cab 14 and the operability of the operation device can be improved comfortably. The center of rotation of the upper swing body 0
(Shown by the body frame 17 in FIGS. 3 and 4) (between the swivel joint mounting portions 2).
5) and a hydraulic pipe 6 communicating with the inside of the deck portion 18.
The inside of the pipe hole 27 and the beam member 20 pierced in the standing plate 15 of the boom mounting bracket of the body frame 17,
Since the cut-out opening 28 is passed through the front plate 29 of the beam member 20, the length of the hydraulic pipe 6 can be minimized and arranged neatly.

Next, FIG. 7 shows an upper revolving unit 7 'according to a second embodiment of the present invention (the outer revolving unit 7' of the second embodiment has an outer shape shown in FIGS. 1 and 2). FIG. 9 is a plan view of a main part showing a body frame 17 ′ of the same shape as the appearance of the body 7 (not shown). In FIG.
The same reference numerals are given to components using the same components as the body frame 17 of the first embodiment shown in FIG. 18 'is a deck portion of the body frame 17', 20 'is a lateral beam member to which cab mount mounting portions 19c and 19d are fixed (by welding), 15' is an upright plate of a boom mounting bracket, and 32a is a boom mounting bracket. A piping hole 32b formed in the bracket standing plate 15 '(on the left side) and an inlet 32b formed in the side frame plate 34 of the deck portion 18' are provided.

FIG. 8 is a diagram viewed from EE in FIG.
In the figure, 29 'is a front plate of the beam member 20'. FIG. 9 is a diagram viewed from FF in FIG.

Next, the structure and operation of the upper swing body 7 'according to the second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the cross section in the front-rear direction of the beam member 20 '(shown in FIG. 7) in the left-right direction of the deck 18' supporting the lower rear portion of the cab (14) is a box-shaped cross section (front) as shown in FIG. Face plate 2
9 ', L-shaped plate 30, box-shaped by bottom plate 31)
An operating device (not shown) in the operator's cab, an operating device (not shown, a pilot operating valve integrated with an operating lever, etc.) integrated in the operating lever, etc., is mounted on the body frame. Hydraulic piping group 6 leading to an arranged hydraulic valve (not shown) or the like is attached to the side frame plate 34 at a position in front of the beam member 20 '(but not in front of the front plate 24 shown in FIG. 8). Introduced inlet 32b, piping hole 3 drilled in boom mounting bracket standing plate 15 '
2a (shown in FIGS. 9 and 8).

Thus, as in the case of the upper swing body 7 of the first embodiment, the side frame plate 34 and the beam member 2 are formed.
0 'has a box-shaped section and possesses high rigidity,
The deck portion 18 'of the body frame 17' is less likely to deform, vibrate, etc., and can improve the riding comfort of the driver's cab and the operability of the control device comfortably. If other equipments (not shown) are arranged in the above and the hydraulic piping cannot be passed, or if there are too many hydraulic pipings,
When it cannot pass through the inside of 0 ', a hole 32b for piping formed in the side frame plate 34 and a standing plate 15' of the boom mounting bracket are formed in a position in front of the beam member 20 '. It can pass through the pipe hole 32a. Further, since the rigidity of the standing plate 15 ′ is increased by the side frame plate 34, even if the piping hole 32 b is opened in the standing plate 15 ′, particularly, the standing plate 15 ′
The working capacity of the work attachment 13 can be maintained without increasing the thickness of the work attachment.

In the second embodiment, if the rigidity of the deck portion 18 'can be maintained, it is not necessary to use the beam member 20', and only the front plate 29 'may be a beam. Further, the beam members 20 and 20 ′ of the present embodiment have a rectangular cross section in the front-rear direction as shown in FIG. 5 and FIG. 8, but are not limited to the quadrangle, but other squares or circles, It is possible to form a round box such as an ellipse.

[0021]

According to the upper revolving structure of the construction machine of the present invention, since the box-shaped beam member has a structurally high rigidity, the cab mounting portion (usually called a deck portion) of the fuselage frame. Hardly deforms, vibrates, etc., and can improve the ride comfort of the driver's cab and the operability of the control device comfortably. The rigidity of the boom mounting bracket also increases the thickness of the standing plate. It can be kept sufficiently without any size. Also, a hydraulic pipe extending from the deck portion to a space between the uprights of the boom mounting bracket (or a hydraulic switching valve (not shown) disposed on the deck portion opposite to the side where the operator's cab is mounted) is connected to the beam member. Since the piping holes are drilled inside (or inside the side frame plate) through the boom mounting bracket standing plate of the body frame, the length of the hydraulic piping can be minimized and arranged neatly.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a hydraulic shovel including an upper swing body according to a first embodiment of the present invention.

FIG. 2 is a plan view of the hydraulic excavator in FIG.

FIG. 3 is a plan view of a main part showing a body frame of the upper-part turning body in FIG. 2;

FIG. 4 is an enlarged view of a portion B in FIG. 3;

5 is a view of the body frame in FIG. 4 as viewed from CC.

FIG. 6 is a view of the body frame in FIG. 4 as viewed from DD.

FIG. 7 is a plan view showing a main part of a body frame of an upper-part turning body according to a second embodiment of the present invention.

FIG. 8 is a diagram viewed from EE in FIG. 7;

FIG. 9 is a view as seen from line FF in FIG. 7;

FIG. 10 is a perspective view showing a revolving upper body of a full-swing type working machine according to one embodiment of the prior art.

FIG. 11 is a perspective view showing a frame of a revolving construction machine according to another embodiment of the prior art.

[Description of Signs] 2,6 Hydraulic Piping Group 7,7 'Upper Revolving Structure 9 Hydraulic Excavator 15,15' Standing Plate 17,17 'Airframe Frame 18,18', 25F Deck 19a, 19b, 19c, 19d Cab Mount Mounting part 20, 20 'Beam member 22 Lower plate 24 Front plate 25 Swivel joint mounting part 27, 28, 32a, 32b Piping hole 29, 29' Front plate 34 Side frame plate

Claims (2)

[Claims] 1. An upper revolving structure, a pair of uprights constituting a boom mounting bracket erected in the center longitudinal direction of the upper revolving structure, one end of which is joined to the uprights and extends in the left-right direction. A beam member to be provided, an operator's cab arranged above the beam member on one of the left and right sides of a boom mounting bracket on the upper revolving unit, and various operation devices arranged in the operator's cab. And the beam member is formed in a box-shaped cross section, and an introduction port for introducing a hydraulic pipe and / or a harness or the like connected to the various operating devices into the box-shaped cross section is opened. Piping holes are formed in the upright on which the operator's cab is mounted, and the beam member is joined to the upright so that each side of the box-shaped cross section surrounds the outer periphery of the piping hole. And the hydraulic piping and / or harness, etc. The construction machine is characterized in that it is introduced into the box-shaped cross section from below the chamber through the introduction port, and is further led out between the pair of uprights of the boom mounting bracket through the piping hole. Upper revolving superstructure. 2. An upper revolving unit, a pair of uprights constituting a boom mounting bracket erected in the front-rear direction of the center of the upper revolving unit, and a box-shaped cross section formed by using the uprights as one side. A side frame plate joined along the standing plate,
An operator's cab arranged above the beam member on one of the left and right sides with a boom mounting bracket on the upper revolving structure interposed therebetween; and various operating devices arranged in the operator's cab. The side frame plate has an opening for introducing hydraulic piping and / or a harness or the like connected to the various operating devices into the box-shaped cross section, and an upright forming the box-shaped cross section. A hole for piping is drilled in the plate, and the hydraulic piping and / or harness is introduced into the box-shaped cross section from below the cab through the introduction port, and further through the piping hole. An upper revolving structure for a construction machine, wherein the upper revolving structure is led out between a pair of uprights of a boom mounting bracket.