JP2018178442A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine capable of appropriately setting a distance between a side portion of a cab and a support plate of a cab side support body and firmly fixing a cab side support body to a top face plate.SOLUTION: A cab side support body 15 is welded with a rib 55 along a direction crossing the longitudinal direction of a top face plate 27. Even if welding distortion occurs at the time of welding, the rib 55 merely tilts in the longitudinal direction with respect to the top face plate 27, so that the influence on the distance direction from a cab 14 is small. It is possible to appropriately set the distance between a side portion of the cab 14 and a support plate 56 attached to the rib 55 and positioned away from the top face plate 27. Even when a large load is applied in the longitudinal direction of the top face plate 27, stress is hardly concentrated on a welded portion between the rib 55 and the top face plate 27, floating hardly occurs, and the welded portion hardly breaks; therefore, the cab side support body 15 can be firmly fixed to the top face plate 27.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a working machine provided with a cab protecting member that suppresses deformation of a cab due to an external force.

  Since work machines such as hydraulic shovels work even on rough terrain or slopes, they may fall over depending on the swing angle of the upper swinging body relative to the lower traveling object, the working posture of the working device, and the bucket load etc. There is also.

  In order to prevent the driver's cab or cab from being deformed by such a lateral load at the time of tipping etc., conventionally, one having a side and a cab side support opposite to the side of the rear of the cab is known. See, for example, Patent Documents 1 and 2.).

JP 2007-85017 A JP 2004-330807 A

  The cab side support body described above is welded to one of the upper surface plates located on the cab side of the pair of vertical plates of the main frame located at the central portion of the turning frame. In the case of such welding, welding distortion is likely to occur in the longitudinal direction of the top plate, that is, in the front and back direction, and additional construction and additional work are necessary to appropriately set the distance to the side of the cab. It will be necessary.

  In addition, since a large load is applied to the longitudinal plate and the upper plate of the main frame in the longitudinal direction, when welding the cab-side support along the longitudinal direction, stress concentrates on the welding end, so the welding strength Challenges such as improvement of

  On the other hand, piping connected to each cylinder, wiring for various sensors, piping and wiring for attachment, etc. are provided on the back of the boom of the working device, and for fixing these or installing valves, etc. Although a bracket may be provided on the top plate of the plate, this bracket also has the same problem as the above-described cab side support depending on the mounting method.

  The present invention has been made in view of such a point, and it is possible to appropriately set the distance between the side portion of the driver's cab and the support plate of the driver's cab protecting member and to make the driver's cab protecting member firmly against the top plate. It is an object of the present invention to provide a work machine that can be fixed.

  The invention according to claim 1 comprises an airframe having an upper surface plate, a working device protrudingly provided on the airframe, a driver's cab disposed laterally on the airframe adjacent to the working device, and a side of the driver's cab And a driver's cab protecting member for suppressing the driver's cab deformation by abutting on the driver's cab when the driver's cab is deformed due to an external force, the driver cab protecting member being opposed to the top plate of the machine body A rib welded along a direction intersecting the longitudinal direction of the top plate, and a support plate attached to the rib and opposed to the side plate of the driver's cab, located apart from the top plate of the airframe It is a work machine.

  The invention according to claim 2 is a working machine to which at least a part of the actuating device for operating the working device is fixed on the side opposite to the cab side of the support plate of the cab protecting member in the working machine according to claim 1 is there.

  According to the first aspect of the present invention, even if the driver's cab protection member welds the ribs along the direction intersecting the longitudinal direction of the top plate, welding distortion may occur even if welding occurs. The rib is inclined with respect to the top plate in the longitudinal direction of the top plate and has little influence on the distance to the driver's cab. It is possible to set the distance between the support plate located away from the face plate appropriately and stress concentration in the weld between the rib and the top plate even when a large load is applied in the longitudinal direction of the top plate. As a result, it is difficult for the welding portion to be damaged due to the occurrence of the shock or the floating, and the driver's cab protection member can be firmly fixed to the top plate.

  According to the invention of claim 2, by supporting at least a part of the actuating device on the opposite side to the cab of the support plate of the cab protecting member, the function of suppressing the deformation of the cab due to the external force, and the actuating device The cab protecting member can double as a function of a fixed bracket that supports at least a part of the driver.

It is a perspective view of an important section of one embodiment of a working machine concerning the present invention. It is a side view of the principal part of a work machine same as the above. It is the rear elevation which expanded the principal part of the work machine same as the above. It is a side view showing the whole same as the above-mentioned working machine.

  Hereinafter, the present invention will be described in detail based on one embodiment shown in FIGS. 1 to 4.

  In FIGS. 1 to 4, reference numeral 11 denotes a working machine, and in the present embodiment, this working machine 11 is, for example, a hydraulic shovel type working machine.

  The work machine 11 includes an airframe 12. Further, the work machine 11 includes a work device 13 which is operatively provided on the machine body 12. Further, the work machine 11 includes a cab 14 which is a cab provided to the machine body 12. Further, the working machine 11 is provided with a cab side support 15 which is a cab protecting member.

  The airframe 12 is provided with a crawler type lower traveling body 21 and an upper revolving structure 22 rotatably provided on the lower traveling body 21. The machine body 12 also includes a main frame (center frame) 23 shown in FIGS. 1 to 3. The main frame 23 is a frame structure which is long in the front-rear direction, is located at the central portion of the swing frame 24 that constitutes the upper swing body 22, and pivotally supports the work device 13 with respect to the machine body 12. The main frame 23 is provided with a pair of vertical plates 26, 26 positioned at the left and right. Further, the main frame 23 is provided with upper surface plates 27, 27. Further, the main frame 23 is provided with a swash plate 28. Also, the main frame 23 is provided with a rear plate not shown. Furthermore, the main frame 23 is provided with a bottom plate 30. Further, the main frame 23 is provided with a reinforcing plate 31. Furthermore, the main frame 23 may be provided with an engine mount. Further, the main frame 23 may be provided with a pivot bearing portion. The main frame 23 is formed into a box shape elongated in the front-rear direction by the vertical plates 26 and 26, the top plates 27 and 27, the swash plate 28, the rear plate, and the bottom plate 30.

  The vertical plates 26, 26 are formed longitudinally along the front-rear direction. That is, the vertical plates 26 have a thickness in the left-right direction. The vertical plates 26, 26 include vertical plate main portions 26a, 26a. Further, the vertical plates 26, 26 are provided with bracket portions 26 b, 26 b for pivotally supporting the working device 13. The vertical plate main portions 26a, 26a and the bracket portions 26b, 26b are integrally formed.

  The vertical plate main portions 26a, 26a are formed to gradually project upward from the rear to the front, that is, to increase in height.

  The bracket portions 26b, 26b are formed to project upward at the front end portions of the vertical plate main portions 26a, 26a. These bracket portions 26 b and 26 b are located on the side near the rear of the cab 14. The rear end of the working device 13 is pivotally supported by a pin (boom foot pin) (not shown) at the rear end of the working device 13 so that the working device 13 protrudes forward. .

  The upper surface plates 27, 27 constitute an upper portion of the main frame 23. The top plates 27, 27 are welded along the upper portions of the vertical plates 26, 26. That is, the upper surface plates 27, 27 have a longitudinal direction along the longitudinal direction which is the longitudinal direction of the airframe 12 (main frame 23), and have a thickness in the vertical direction. In other words, the upper surface plates 27, 27 are horizontal plate portions substantially perpendicular to the vertical plates 26, 26. Further, the upper surface plates 27, 27 are provided with upper surface plate main portions 27a, 27a located above the vertical plate main portions 26a, 26a. Further, the upper surface plates 27, 27 are provided with mounting plate portions 27b, 27b positioned above the bracket portions 26b, 26b. The top plate main body portions 27a and 27a and the mounting plate portions 27b and 27b are integrally formed.

  The upper surface plate main body portions 27a, 27a are formed longitudinally along the front-rear direction.

  The mounting plate portions 27b, 27b are located at the upper rear portions of the bracket portions 26b, 26b. For this reason, these mounting plate parts 27b and 27b are arranged to incline upward from the rear to the front.

  The swash plate 28 is welded between the fronts of the vertical plates 26, 26. Specifically, the swash plate 28 is welded between the bracket portions 26b and 26b. Therefore, the swash plate 28 is positioned opposite to the rear of the working device 13. The swash plate 28 is disposed to be inclined downward toward the front.

  The rear plate is welded between the rear ends of the vertical plates 26, 26 in the left-right direction, that is, in a direction intersecting (orthogonal to) the longitudinal direction of the main frame 23.

  A plurality of bottom plates 30 are stretched between the vertical plates 26 and 26 and welded.

  The reinforcing plate 31 is welded between the inner side surfaces of the vertical plates 26, 26 in the left-right direction, that is, in a direction intersecting (orthogonal to) the longitudinal direction of the main frame 23.

  The engine mount supports the engine. The engine mount is attached to the side surface of the vertical plate 26 or other frame portion, for example, at the rear of the vertical plates 26, 26 without the top plates 27, 27.

  The pivot bearing portion is a portion for pivotably attaching the pivot frame 24 to the lower traveling body 21. The pivot bearing portion is, for example, bolted to the bottom plate 30.

  The work device 13 is disposed on the airframe 12 adjacent to the side of the front of the cab 14. Specifically, in the working device 13, the boom 34 as an arm portion constituting the base end portion is a pin at the upper swing body 22 (between the vertical plates 26, 26 (bracket portions 26b, 26b) of the main frame 23) It is pivotally supported by (a boom foot pin) and is positioned adjacent to the side of the cab 14. In the working device 13, the boom 34 is pivotally supported in the vertical direction by the upper swing body 22 and is pivoted by the boom cylinder 35, and the arm 36 is pivotally connected to the tip of the boom 34. The bucket 38 is pivotally connected to the tip end of the arm 36 so that the bucket 38 is pivoted by the bucket cylinder 39.

  The cab 14 protects an operator who operates the machine body 12 and the working device 13. The cab 14 is provided on one side in the left-right direction of the front portion on the machine body 12, for example, on the left side. That is, the cab 14 is disposed on the side of the work device 13 and the main frame 23. The cab 14 is provided with front pillars 40. Further, the cab 14 is provided with rear pillars 41 and 41. Furthermore, the cab 14 is provided with a center pillar 42. Further, the cab 14 is provided with a front head portion 43. Further, the cab 14 is provided with a rear head portion 44. Also, the cab 14 is provided with a ceiling panel 45. Furthermore, the cab 14 is provided with a rear panel 46. Further, the cab 14 is provided with a front window 47. Furthermore, the cab 14 is provided with a rear window 48. Further, the cab 14 is provided with side windows 49 and 50. Furthermore, the cab 14 may be provided with a skylight 51. Then, inside the cab 14, although not shown, a driver's seat on which the operator sits, an operation lever operated by the operator, an operation pedal, a monitor and the like are arranged.

  The front pillars 40 and 40 are disposed from the front of the cab 14 to the ceiling and are disposed on the left and right. The front pillars 40 may be, for example, deformed steel pipes.

  The rear pillars 41 and 41 are located at the rear of the cab 14 and disposed at the left and right portions, respectively. The rear ends of the front pillars 40 are connected to the upper ends of the rear pillars 41.

  The center pillar 42 is located on the left side which is one side of the cab 14, that is, on the opposite side to the working device 13. The center pillar 42 is located between the front pillar 40 and the rear pillar 41, and its upper end is connected to the front pillar 40. A door 52 is provided between the front pillar 40 and the center pillar 42 for opening and closing when the operator gets on and off (FIG. 4).

  The front head portion 43 is located along the left-right direction, and connects the upper portions of the front pillars 40 at the front of the cab 14.

  The rear head portion 44 is located along the left-right direction, and connects the upper portions of the rear pillars 41 and 41.

  The ceiling panel 45 is disposed between the front pillars 40 and 40 and the rear pillars 41 and 41 at the ceiling of the cab 14.

  The rear panel 46 is disposed below the rear window 48 between the rear pillars 41 and 41.

  The front window 47 is located in front of the cab 14 and surrounded by the front pillars 40 and 40 and the front head portion 43.

  The rear window 48 is positioned on the rear surface of the cab 14 so as to be surrounded by the rear pillars 41 and 41, the ceiling panel 45, and the rear panel 46.

  The lateral window 49 is located on the left side surface of the cab 14 so as to be enclosed between the front pillar 40 and the center pillar 42 and between the center pillar 42 and the front pillar 40 and the rear pillar 41. That is, a part of the side window 49 is provided to the door 52.

  The side window 50 is positioned on the right side of the cab 14 so as to be surrounded by the front pillar 40 and the rear pillar 41. The side window 50 is positioned to face the work device 13 (the boom 34).

  The skylight 51 is disposed at the front of the ceiling panel 45 at the ceiling of the cab 14. The skylight 51 is adjacent to the front window 47 via the front head portion 43. This skylight 51 may be provided so as to be openable and closable.

  The cab side support 15 is disposed on the side of the rear of the cab 14 and abuts on the cab 14 when the cab 14 is deformed by an external force F such as a lateral load when, for example, the work machine 11 falls over. To suppress the deformation (torsion deformation) of That is, the cab side support 15 protects the cab 14 against deformation due to the external force F. The cab side support 15 is fixed to the machine body 12 (main frame 23). Further, the cab side support 15 is provided with a rib 55. Furthermore, the cab side support 15 is provided with a support plate (plate) 56. And, at least a part of the actuating device 57 (FIG. 1) may be fixed to the cab side support 15.

  The ribs 55 fix the cab side support 15 to the upper surface plate 27 of the machine body 12 (main frame 23), and reinforce the support plate 56 against the external force F. The rib 55 is arranged to be substantially perpendicular to each of the top plate 27 and the support plate 56. That is, the ribs 55 are an upper surface plate welded portion 55 a welded to the upper surface plate 27 (mounting plate portion 27 b) located on the vertical plate 26 on the cab 14 side, and a support surface 59 facing the cab 14 of the support plate 56. It is formed in a substantially triangular (substantially L-shaped) plate shape including a support plate weld portion 55b welded to the attachment surface 60 which is the opposite surface to the rear surface side, that is, the surface opposite to the cab 14 side. The ribs 55 may be singular or plural, but in the present embodiment, for example, a pair is provided. The ribs 55, 55 are arranged to be substantially parallel to each other at a distance from each other. And each rib 55 intersects the front and back direction which is a longitudinal direction of the upper surface plate 27 with respect to the upper surface plate 27 (attachment plate portion 27b) of the machine body 12 (main frame 23). Welded along the direction. That is, each rib 55 is welded such that the upper surface plate welded portion 55a crosses the upper surface plate 27 in the left-right direction. For this reason, each rib 55 is disposed to be substantially orthogonal to the upper surface plate 27, that is, to have a thickness in the front-rear direction. In other words, the vertical plate 26, the upper surface plate 27, and the rib 55 are disposed such that the plate thickness directions are substantially orthogonal to each other.

  The support plate 56 receives a part of the external force F by coming into contact with the cab 14 deformed by the external force F, thereby suppressing the deformation of the cab 14. The support plate 56 is located away from the airframe 12 (main frame 23) with the ribs 55 (upper surface plate welds 55a) welded to the upper surface plate 27, and is opposed to the side of the cab 14 There is. Specifically, the support plate 56 is spaced upward with respect to the airframe 12 (main frame 23), and faces the side of the rear pillar 41 (rear pillar 41 and rear panel 46) which is the rear of the cab 14 . In other words, the support plate 56 faces the rear of the side window 50 at a distance from the side window 50. In addition, for example, in the present embodiment, the support plate 56 is positioned substantially flush with the edge of the top plate 27 on the cab 14 side (FIG. 3), but the edge of the top plate 27 on the cab 14 side May be located on the cab 14 side. Further, the support plate 56 is arranged such that the support surface 59 facing the cab 14 maintains a substantially constant distance (substantially parallel) with the side portion of the cab 14. The support plate 56 may have an arbitrary shape, but in the present embodiment, it is formed, for example, in a pentagonal shape. For example, the support plate 56 is a side disposed so as to be substantially parallel to the upper surface plate 27 (mounting plate portion 27 b) in a state where the cab side support 15 is fixed to the machine body 12 (main frame 23) A portion 56a, a pair of side portions 56b and 56c which rise substantially perpendicularly to the side portion 56a from both end portions of the side portion 56a, and a side portion 56d which is disposed along the horizontal direction continuously with the side portion 56b; A side portion 56e is provided so as to be continuous with the side portion 56c and to be continuous with the side portion 56d at the shortest distance, that is, along the vertical direction (FIG. 2).

  The operating device 57 operates the working device 13. Specifically, the actuating device 57 works by supplying and discharging a working fluid (hydraulic oil) to fluid pressure actuators (hydraulic actuators) such as cylinders 35, 37, 39 and attachments such as valves and pipes. A hydraulic fluid supply / discharge device (hydraulic fluid supply / discharge device) for operating the device 13 or a wire connected to various sensors disposed in the work device 13 is provided. The actuating device 57 is a surface of the support plate 56 of the cab side support 15 opposite to the cab 14 side, that is, the back side of the support plate 56, in other words, the surface of the rib 55 welded. For example, a bolt 64 or the like is fixed to the mounting surface 60 via a bracket 63 (FIG. 1). More specifically, this actuating device 57 is thus also used as a fixed bracket for fixing the actuating device 57 near the base end of the working device 13 (boom 34). The actuating device 57 is provided such that a long member such as, for example, a pipe or a wiring is directed to the tip end side of the working device 13.

  Next, the operation and effect of the illustrated embodiment will be described.

  First, the cab-side support 15 welds the rib 55 (upper surface plate welded portion 55a) to the upper surface plate 27 (mounting plate portion 27b). At this time, the ribs 55 are welded along, for example, a direction orthogonal to, for example, an anteroposterior direction which is a longitudinal direction of the top plate 27. In the present embodiment, the rib 55 crosses (orthogonalizes) the top surface plate 27 (mounting plate portion 27 b) at a position away from the top surface plate 27 in the longitudinal direction which is the longitudinal direction of the top surface plate 27. Weld one pair each in the direction. At the time of this welding, each rib 55 is, for example, fillet welded to the upper surface plate 27 in the present embodiment for the front and back, but depending on the thickness of each rib 55, it may be groove welding. . Therefore, in the case of the present embodiment, four welding lines intersecting (orthogonal to) the longitudinal direction of the top plate 27 are generated. The cab side support 15 is manufactured in advance by welding the rib 55 (support plate welded portion 55b) to the support plate 56, and the rib 55 (upper surface plate welded portion 55a) is formed on the upper surface plate 27 (attachment plate portion With respect to 27b), welding may be performed along a direction intersecting (orthogonal to) the longitudinal direction which is the longitudinal direction of the top plate 27.

  In this manner, welding distortion is temporarily generated at the time of welding by welding the rib 55 along the direction intersecting (orthogonal to) the longitudinal direction (front-rear direction) of the upper surface plate 27 in this manner. Even if it is generated, the rib 55 is only inclined in the front-rear direction which is the longitudinal direction of the upper surface plate 27 with respect to the upper surface plate 27, and the influence in the lateral direction which is the distance direction from the cab 14 is small. Therefore, it is possible to appropriately set the distance between the side portion of the cab 14 and the support plate 56 attached to the rib 55 and located apart from the top plate 27 of the airframe 12 (main frame 23). .

  In addition, since the rib 55 is oriented in a direction perpendicular to the front-rear direction which is the longitudinal direction with respect to the upper surface plate 27, welding of the rib 55 to the upper surface plate 27 is only the front and back portions of the rib 55. It is welded so that it does not become wide in the longitudinal direction. For this reason, even when a large load is applied in the longitudinal direction of the vertical plate 26 and the upper surface plate 27, stress concentration occurs in the weld between the rib 55 and the upper surface plate 27, and the cab side support 15 is lifted to cause welding. It is hard to damage a part. That is, the cab side support 15 can be firmly fixed to the upper surface plate 27.

  Then, when an external force F directed to the side of the work device 13 acts on the side of the cab 14 opposite to the work device 13, for example, when the work machine 11 falls over, the boom 34 of the work device 13 Since the cab side support 15 supports the rear side of the cab 14 while supporting the front side, the external force F can be dispersed throughout the cab 14, and the torsional deformation of the cab 14 can be realized. It can be suppressed.

  Further, since the cab side support 15 is disposed to face the side portion of the rear pillar 41 at the rear of the cab 14, the cab side support 15 is positioned in the vicinity of the pivot portion (boom foot pin) of the working device 13 in the layout of the working machine 11. Do. For this reason, the cab side support 15 can also support at least a part of the actuating device 57 on the attachment surface 60 opposite to the cab 14 of the support plate 56, and suppresses deformation of the cab 14 due to the external force F. The cab side support 15 can double as the function and the function of the fixed bracket that supports at least a part of the actuating device 57. Therefore, it is not necessary to separately provide a fixing bracket, which makes it possible to reduce the number of parts, which can contribute to the improvement of the manufacturability of the working machine 11 and the cost reduction.

  INDUSTRIAL APPLICABILITY The present invention has industrial applicability to businesses involved in the manufacturing industry, sales industry and the like of working machines such as hydraulic excavators.

11 Working machine
12 aircraft
13 Work equipment
14 Cab that is the cab
15 Cab side support which is a cab protection member
27 top plate
55 ribs
56 Support plate
57 Actuator

Claims (2)

An airframe provided with a top plate,
A working device operatively provided on the machine body;
A driver's cab located laterally on the machine body adjacent to the working device;
It is disposed on the side of the cab, and comprises a cab protecting member for suppressing the deformation of the cab by contacting the cab when the cab is deformed by an external force.
The cab protection member is
A rib welded along a direction intersecting the longitudinal direction of the top plate of the airframe with the top plate of the fuselage;
A working machine comprising: a support plate which is attached to a rib and which is located apart from an upper plate of the machine body and which faces the driver's cab. The work machine according to claim 1, wherein at least a part of an operating device for operating the working device is fixed to a side opposite to the cab side of the support plate of the cab protecting member.

Images