CN221142907U - Excavator - Google Patents

Abstract

The utility model provides a technique capable of simply inhibiting contact with a boom cylinder along with swing of a control cabin. An excavator (100) is provided with: a lower traveling body (1); an upper revolving body (3) having a revolving frame (3F) rotatably provided to the lower traveling body (1); a boom cylinder (7) provided to the upper revolving unit (3); and a control room (10) provided in the upper revolving unit (3) at a position adjacent to the boom cylinder (7) for the operator to ride. The shovel (100) is provided with: a plurality of supports (50) fixed to the revolving frame (3F) for swingably supporting the cab (10) in a state of being floated from the revolving frame (3F); and a stopper (60) provided between the revolving frame (3F) and the control room (10). The stopper (60) is provided to suppress contact between the boom cylinder (7) and the cab (10) when the cab (10) swings.

Description

Excavator

Technical Field

The present application claims priority based on japanese patent application No. 2022-207545 filed on day 2022, 12 and 23. The entire contents of this japanese application are incorporated by reference into the present specification.

The present utility model relates to an excavator having a cab.

Background

Patent document 1 discloses an excavator, which includes: a lower traveling body; an upper revolving unit capable of revolving relative to the lower traveling unit; and a cab (control room) provided on the upper revolving structure for an operator to ride on.

Such an excavator supports the cab on the revolving frame of the upper revolving structure via a plurality of supports. Each support is made of elastic material, and supports the cab while reducing vibration during operation of the excavator. Thus, the earth-moving machine can improve riding comfort of an operator.

Patent document 1: international publication No. 2019/039522

The excavator includes a boom cylinder at a position adjacent to the cab. Therefore, as the excavator swings laterally due to vibration, the gap between the cab and the boom cylinder becomes narrower. If the excavator swings greatly, the possibility of the cab coming into contact with the boom cylinder increases.

Disclosure of utility model

The utility model provides a technique capable of simply avoiding contact with a boom cylinder along with swing of a control cabin.

According to one aspect of the present utility model, there is provided an excavator comprising: a lower traveling body; an upper revolving structure having a revolving frame rotatably provided to the lower traveling body; a boom cylinder provided to the upper revolving unit; a control room provided in the upper revolving body at a position adjacent to the boom cylinder, for an operator to ride; a plurality of holders fixed to the swing frame to swingably support the cab in a state of being lifted from the swing frame; and a stopper provided between the revolving frame and the control room, the stopper being provided to suppress contact between the boom cylinder and the control room when the control room swings.

Effects of the utility model

According to one embodiment, contact with the boom cylinder with swing of the cab can be simply avoided

Drawings

Fig. 1 is a left side view of an excavator according to an embodiment.

Fig. 2 (a) is a view of the cabin of the excavator and the peripheral portion thereof, as seen from the front side. Fig. 2 (B) is a view of the revolving frame of the installation site of the cab, viewed from the upper side.

Fig. 3 is a perspective view showing a structure for supporting the cab in the revolving frame.

Fig. 4 is a partial cross-sectional view showing a state in which the stopper is installed.

Fig. 5 is an enlarged partial cross-sectional view showing the peripheral portion of the stopper when the cab is shaken.

Fig. 6 (a) is a front view illustrating a state in which shake of the control room is suppressed by the stopper according to the present embodiment. Fig. 6 (B) is a front view illustrating the swing of the cab of the excavator without the stopper as a comparative example.

Fig. 7 (a) is a diagram showing the 1 st operation of removing the stopper. Fig. 7 (B) is a diagram showing the 2 nd operation of removing the stopper. Fig. 7 (C) is a diagram showing the 3 rd operation of removing the stopper. Fig. 7 (D) is a diagram showing the 4 th operation of removing the stopper.

In the figure: 1-lower traveling body, 3-upper revolving body, 3F-revolving frame, 7-movable arm cylinder, 10-cab, 50-support, 60-stopper, 61-stopper body, 62-reinforcing rib, 63-fixing bolt, 100-excavator, 114-eave portion, 611-base plate portion, 612-protruding plate portion, 613-roof portion.

Detailed Description

Hereinafter, modes for carrying out the present utility model will be described with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals, and overlapping description thereof may be omitted.

First, an overall structure of an excavator 100 according to an embodiment of the present utility model will be described with reference to fig. 1. Fig. 1 is a side view showing an excavator 100 according to an embodiment of the present utility model.

In the following description, the X direction, the Y direction, and the Z direction shown in fig. 1 are directions perpendicular to each other, and typically, the X direction and the Y direction are horizontal directions, and the Z direction is a vertical direction. The X direction is the front-rear direction of the shovel 100, the front side is the +x direction, and the rear side is the-X direction. The Y direction is the left-right width direction of the shovel 100, the right side is the +y direction, and the left side is the-Y direction. The Z direction is the height direction of the shovel 100, the upper side is the +z direction, and the lower side is the-Z direction.

The shovel 100 has: a crawler-type lower walking body 1 capable of self-walking; and an upper revolving unit 3 rotatably mounted on the lower traveling body 1 via a revolving unit 2.

The upper revolving structure 3 has a revolving frame 3F fixed to a revolving unit, not shown, of the revolving mechanism 2. The boom 4 is attached to the revolving frame 3F so as to be capable of tilting. The boom 5 is rotatably attached to the tip end of the boom 4. A bucket 6 as an attachment is rotatably attached to the front end of the arm 5. The work attachment includes a boom 4, an arm 5, and a bucket 6.

The boom cylinder 7 is provided between the revolving frame 3F and the boom 4. By the boom cylinder 7, the boom 4 performs a pitching operation with respect to the revolving frame 3F. The boom cylinder 8 is provided between the boom 4 and the arm 5. By the boom cylinder 8, the arm 5 is rotated with respect to the boom 4. Further, a bucket cylinder 9 is provided between the bucket 6 and the arm 5. The bucket cylinder 9 rotates the bucket 6 with respect to the arm 5.

An engine not shown and components attached to the engine are mounted on the rear part of the revolving frame 3F of the upper revolving unit 3. A cab 10 for an operator to ride on and operate the shovel 100 is provided at the front portion of the revolving frame 3F of the upper revolving structure 3.

Fig. 2 (a) is a view of the cab 10 and its peripheral portion of the shovel 100 from the front (+x direction) side. Fig. 2 (B) is a view of the revolving frame 3F of the installation site of the cab 10, viewed from above (+z direction) side. As shown in fig. 2 (a), the shovel 100 includes a cab 10 on the +y direction side of the upper revolving structure 3. The shovel 100 is provided with a boom 4 at a center portion in the Y direction (right-left width direction), and a pair of boom cylinders 7 are provided on both right and left sides (Y direction) of the boom 4. The pair of boom cylinders 7 varies according to the position of the boom 4, and extends substantially obliquely upward (in the +x direction and the +z direction).

The control cabin 10 is formed in a substantially rectangular parallelepiped shape of a size that can be ridden by an operator. A driver's seat, a control box, a lever, an operating pedal, and the like, not shown, are provided in the cabin 10.

The control room 10 has a control room side frame 11 forming a skeleton of the control room 10. The cage-side frame 11 includes: a substantially flat floor panel 111; a plurality of posts 112 extending upward from the floor panel 111; and a ceiling frame 113 supported by the plurality of columns 112. The cabin 10 includes a window 12 fixed to the cabin side frame 11 and a door 13 for allowing an operator to enter and exit from the side in the +y direction (see fig. 1).

The window 12 is made of transparent glass, and is provided in +x direction, -X direction, +y direction (including the door 13), and-Y direction of the cab 10 so that the entire work site can be visually recognized as much as possible. Therefore, the window 12 in the-Y direction is disposed at a position adjacent to the boom cylinder 7. The window 12 may be provided on the ceiling (between the ceiling frames 113) of the cab 10.

On the other hand, revolving frame 3F includes cab support area 30 at a portion where cab 10 is supported. The cage support region 30 is formed by assembling a plurality of frames extending in the horizontal direction by a fixing method such as welding or screw fastening. For example, the cab support area 30 includes an outer side vertical frame 31 extending in the X direction on the +y direction side, a plurality of lateral frames (a front lateral frame 32, a middle lateral frame 33, and a rear lateral frame 34) connected to the outer side vertical frame 31, a 1 st inner side vertical frame 35 extending in the X direction between the front lateral frame 32 and the middle lateral frame 33 on the-Y direction side, and a 2 nd inner side vertical frame 36 extending in the X direction between the middle lateral frame 33 and the rear lateral frame 34 on the-Y direction side.

The outer side vertical frames 31, the front side horizontal frames 32, the rear side horizontal frames 34, the 1 st inner side vertical frames 35, and the 2 nd inner side vertical frames 36 have substantially the same dimensions as the planar shape of the cab 10 in the plan view shown in fig. 2 (B). Thereby, the cabin supporting region 30 can stably support the outer peripheral portion of the floor panel 111 of the cabin 10.

Further, the shovel 100 is configured such that a plurality of (4 in fig. 2B) mounts (vibration-proof mounts) 50 are provided on the revolving frame 3F, and the cab 10 is supported by the plurality of mounts 50. The 4 holders 50 are provided at positions corresponding to the 4 corners of the floor panel 111 of the cab 10, respectively. Specifically, in the +x direction of the cab support area 30, one support 50 is provided at a corner where the outer side vertical frame 31 and the front side horizontal frame 32 are connected, and the other support 50 is provided at a corner where the front side horizontal frame 32 and the 1 st inner side vertical frame 35 are connected. In the-X direction of the cab support area 30, 2 holders 50 are provided on both sides in the width direction of the rear cross frame 34. As shown in fig. 2 (a), each of the holders 50 puts the cab 10 in a (floating) state away from the revolving frame 3F, and swingably supports the cab 10 with appropriate elasticity. The mount 50 may be disposed on the-Y direction side (boom cylinder 7 side) instead of the +y direction side away from the boom cylinder 7.

Fig. 3 is a perspective view showing a structure for supporting the cab 10 in the revolving frame 3F. Each holder 50 includes, for example, a bottomed cylindrical case 51 having an upper surface opened, and an elastic member 52 is accommodated in the case 51. The case 51 has a flange 51f protruding in an outer direction at an upper end portion. The flanges 51F are attached to brackets 53 fixed to the revolving frame 3F by bolts 54 or the like.

The elastic member 52 is formed of an elastic body such as synthetic rubber, and is fixed to the inner side of the housing 51. A highly viscous liquid, not shown, may be injected into the space between the housing 51 and the elastic member 52. The elastic member 52 includes a cylindrical base 521 and a pin 522 protruding from the center of the base 521. The base 521 and the pin 522 are integrally formed with each other.

The pin 522 protrudes upward (in the +z direction) to be short, and is inserted into a hole (not shown) provided in the floor panel 111 of the cab 10. The base portion 522a of the pin 522 connected to the base 521 is formed in a truncated cone shape (see also fig. 4). The pins 522 can support the floor panel 111 by contacting the upper end portions of the base portions 522a with the peripheral edges of the holes of the floor panel 111 in a state inserted into the holes of the floor panel 111.

The shovel 100 suppresses vibration accompanying the operation in each of the mounts 50, and transmits the vibration from the revolving frame 3F to the cab 10. Thus, although the cabin 10 swings, the swing thereof is suppressed, thereby improving the riding comfort of the operator riding in the cabin 10. However, the cab 10 supported by the respective brackets 50 may also largely swing due to various causes such as the large vibration of the shovel 100 and the vibration of the shovel 100 on a slope. In the shovel 100, the adjacent boom cylinder 7 may contact the cab 10 due to the large swing of the cab 10. In the case where the window 12 is adjacent to the boom cylinder 7, the window 12 may be broken (ruptured) by contact with the boom cylinder 7.

Therefore, in the shovel 100 according to the present embodiment, the stopper 60 is provided to suppress contact between the boom cylinder 7 and the cab 10 when the cab 10 swings. Next, the stopper 60 and its peripheral structure will be described in detail with reference to fig. 3 and 4. Fig. 4 is a partial cross-sectional view showing a state in which the stopper 60 is installed.

The stopper 60 is fixed to the upper surface of the 1 st inner vertical frame 35 of the revolving frame 3F. In the shovel 100 according to the present embodiment, 2 stoppers 60 are provided in an aligned manner along the extending direction (X direction) of the 1 st inner vertical frame 35. The number of stoppers 60 provided on the 1 st inner vertical frame 35 is not particularly limited, and may be 1 or 3 or more.

Each stopper 60 is provided on the outer side (-Y direction side) of the mount 50 provided on the-Y direction side in the cab support area 30 of the revolving frame 3F. In other words, each stopper 60 is provided separately from the portion where the mount 50 in the-Y direction is located, and is disposed on the proximal side of the boom cylinder 7 than the mount 50 in the-Y direction. Further, each stopper 60 is disposed further forward than the intermediate position (intermediate cross frame 33) in the front-rear direction of the cab support area 30. In particular, in the present embodiment, each stopper 60 is provided on the front (+x direction) side in the 1 st inner side vertical frame 35 adjacent to the boom cylinder 7 (refer to fig. 2 (B) in addition). Thereby, each stopper 60 can suppress the swing of the cab 10 at a position closer to the boom cylinder 7.

More specifically, each stopper 60 is provided at an inclined position on the-Y direction side and the-X direction side with respect to the holder 50 in the-Y direction and the +x direction. The distance between the stopper 60 closest to the holder 50 and the holder 50 may be longer than the width of the stopper 60 in the width direction and shorter than the total length of the stopper 60 in the length direction, for example. In this way, each stopper 60 is provided at a position away from the mount 50 (a position not overlapping the mount 50 in a plan view, a position not contacting the swing mount 50 itself), and thus, contact between the cab 10 and the boom cylinder 7 can be suppressed without interfering with swing of the cab 10 by the mount 50.

However, the installation position of each stopper 60 is not limited to the example of fig. 2 (B). The stoppers 60 may be provided on the rear (-X direction) side of the 1 st inner vertical frame 35 or may be provided on the 2 nd inner vertical frame 36. Alternatively, the stoppers 60 may be provided on the-Y direction side of the front cross frame 32, the-Y direction side of the intermediate cross frame 33, the-Y direction side of the rear cross frame 34, or the like. Further, each stopper 60 may be provided on the far side (+y direction side) from the holder 50 on the-Y direction side.

The stopper 60 is formed in a rectangular shape in a plan view, and is fixed to the 1 st inner side vertical frame 35 so that the X direction in which the 1 st inner side vertical frame 35 extends coincides with the longitudinal direction. The stopper 60 is made of a material having sufficient rigidity and durability. The material of the stopper 60 is not particularly limited, and for example, a metal material such as iron, steel, stainless steel, or other alloy is preferably used.

In detail, the stopper 60 has: the stopper main body 61 has a C-shape (コ -shape) in a cross section orthogonal to the longitudinal direction; a reinforcing rib 62 provided inside the stopper main body 61; and a plurality of fixing bolts 63 for fixing the stopper main body 61 to the revolving frame 3F.

The stopper main body 61 is formed by bending a rectangular plate member having an appropriate thickness 2 times, for example. Thus, as shown in fig. 4, the stopper main body 61 has a shape having: a base plate portion 611; a protruding plate portion 612 protruding from the base plate portion 611 in the orthogonal direction; and a top plate portion 613 protruding from the protruding plate portion 612 in the orthogonal direction. The base plate portion 611 and the top plate portion 613 extend parallel to each other. The base plate portion 611 and the protruding plate portion 612 and the top plate portion 613 are connected to each other via corner portions (not shown) bent into an R shape.

The base plate 611 is fixed to the upper surface of the revolving frame 3F (1 st inner vertical frame 35). The base plate 611 functions as a base when the stopper 60 supports the cab 10. Accordingly, the width of the base plate portion 611 with the protruding plate portion 612 as a base point is set to be longer than the width of the top plate portion 613. The base plate portion 611 has a plurality of bolt holes 611h into which the fixing bolts 63 are inserted.

The protruding plate portion 612 is a portion that supports the top plate portion 613 that is away from the base plate portion 611 in the +z direction. The protruding plate portion 612 has an appropriate length in the Z direction so that the top plate portion 613 approaches the floor panel 111 of the cabin 10 in a state where the base plate portion 611 is fixed to the revolving frame 3F. For example, the length L of the protruding plate portion 612 is set longer than the distance D between the floor panel 111 and the top plate portion 613.

The top plate portion 613 is a portion that is not in contact with the floor panel 111 in a state where the shovel 100 is not vibrating, and is in contact with the floor panel 111 when the cab 10 is largely swung. For example, the upper surface of the top plate 613 (the protruding end surface of the stopper body 61) may be disposed above (in the +z direction) the upper surface of the base 521 of the stand 50 in a state where the base plate 611 is fixed to the revolving frame 3F.

The floor panel 111 of the cab 10 includes a lower plate body 111a supported by the respective supports 50 and an upper plate body 111b mounted on an upper surface of the lower plate body 111 a. The upper plate 111b is formed with a floor design constituting the interior of the cab 10. The column 112 of the cab 10 is fixed to an end wall of the upper plate 111b bent downward (-Z direction) at the outer edge portion thereof. The end wall of the floor panel 111 and the lower end portion of the pillar 112 function as an eave 114 covering the stopper main body 61 in the-Y direction. That is, the stopper 60 attached to the revolving frame 3F is substantially covered by the eave 114 of the cab 10, and is prevented from being visually recognized from the side.

As described above, since the width of the top plate 613 in the Y direction is shorter than the width of the base plate 611 in the Y direction, the stopper 60 can be taken out by being inspected so as to bypass the eave 114 in a state where the cab 10 is mounted on the revolving frame 3F. The removal operation of the stopper 60 will be described in detail later.

The reinforcing ribs 62 of the stopper 60 reinforce the C-shape of the stopper 60 inside the stopper body 61. In the present embodiment, 2 reinforcing ribs 62 are provided along the longitudinal direction of the stopper main body 61 (see fig. 3). Of course, the number of the reinforcing ribs 62 is not particularly limited, and may be 1 or 3 or more.

Each of the ribs 62 is formed in a C-shape along the stopper main body 61, and a concave portion 621 is provided on the inner side thereof. Thus, the stopper 60 has a concave space 60s inside the reinforcing rib 62.

Each of the ribs 62 is formed of a plate member different from the stopper main body 61, for example, and is connected to the stopper main body 61 by an appropriate connecting method such as welding. Each of the ribs 62 is connected to the base plate portion 611, the protruding plate portion 612, and the top plate portion 613. Thereby, each of the reinforcing ribs 62 can firmly support the inside of the stopper main body 61. In order to increase the rigidity of the stopper 60 as a whole, the thickness of each reinforcing rib 62 is preferably formed to be thicker than the plate thickness of the stopper main body 61. Further, by cutting out the position facing the corner of the stopper main body 61 of each reinforcing rib 62, each reinforcing rib 62 can be easily coupled to the inner surface of the stopper main body 61 without being affected by the shape of the corner of the stopper main body 61.

Returning to fig. 3, the stopper 60 is attached to the revolving frame 3F by a plurality of (3 in fig. 3) fixing bolts 63. Each fixing bolt 63 is screwed into an internal screw hole (not shown) formed in the revolving frame 3F through a bolt hole 611h penetrating the base plate portion 611 of the stopper main body 61, and the stopper main body 61 can be firmly fixed.

The bolt holes 611h of the stopper main body 61 and the female screw holes of the revolving frame 3F are arranged in a staggered manner in the X direction. Thereby, the 3 fixing bolts 63 fix the base plate 611 in a staggered manner. Specifically, the fixing bolt 63 at one longitudinal end of the stopper body 61 and the fixing bolt 63 at the other longitudinal end of the stopper body 61 are arranged in the X direction at positions distant from the protruding plate portion 612. The fixing bolt 63 at the middle part in the longitudinal direction of the stopper body is provided closer to the protruding plate part 612 than the other 2 fixing bolts 63. By providing the fixing bolts 63 in this manner, the stopper 60 can suppress tilting of the stopper main body 61 or the like.

The excavator 100 according to the present embodiment is basically configured as described above, and the operation thereof will be described below. Fig. 5 is an enlarged partial cross-sectional view showing the peripheral portion of stopper 60 when cab 10 swings.

As shown in fig. 5, when the cab 10 is largely swung, the floor panel 111 contacts the top plate portion 613 of the stopper 60 provided in the 1 st inner vertical frame 35. That is, the distance D between the floor panel 111 and the top plate 613 is zero. The stopper 60 is disposed at a position where it can support the floor panel 111 so that the eave 114 does not come into contact with the 1 st inner vertical frame 35 even when the cab 10 is largely swung. That is, even If the cab 10 largely swings, the stopper 60 can suppress the distance If between the eave 114 and the 1 st inner vertical frame 35 to a constant value. Thus, the stopper 60 can prevent the cab 10 from being greatly inclined in the-Y direction, and can be prevented from abutting the boom cylinder 7.

The stopper 60 having a C-shape can firmly maintain the posture of the top plate 613 by the rib 62, the base plate portion 611, the protruding plate portion 612, and the like even when a load is applied from the floor panel 111. In particular, the stopper 60 prevents the entire stopper body 61 from tilting by the fixing bolts 63 fixed in a staggered manner, and thus can stably suppress the swing of the cab 10.

Fig. 6 (a) is a front view illustrating a state in which tilting of the cab 10 is suppressed by the stopper 60 according to the present embodiment. Fig. 6 (B) is a front view illustrating the swing of the cab 10 of the excavator 200 without the stopper 60 as a comparative example. As shown in fig. 6B, in the excavator 200 without the stopper 60, when the cab 10 is largely swung in the Y direction (see the arrow of the two-dot chain line), the clearance C between the cab and the boom cylinder 7 located at the adjacent position is almost eliminated. For example, the cab 10 may be inclined in the-Y direction by 5 ° or more with respect to the standing posture when there is no vibration. Further, according to circumstances, the window 12, the column 112, or the like of the cab 10 may come into contact with the boom cylinder 7, thereby causing breakage of the cab 10 (-window breakage in the Y direction, or the like).

In contrast, in the construction including the stopper 60 as in the shovel 100 according to the present embodiment, the floor panel 111 of the cab 10 that swings greatly contacts the stopper 60, so that the cab 10 can be prevented from tilting in the-Y direction. For example, the cab 10 is prevented from being inclined in the-Y direction by a predetermined angle (for example, 4 °) or more with respect to the standing posture when there is no vibration. Therefore, even if the cab 10 swings greatly, the cab 10 can be reliably prevented from contacting the boom cylinder 7.

However, the shovel 100 does not suppress the swing itself of the cab 10 accompanying the vibration of the shovel 100. That is, the swing of the cab 10 in the +y direction is allowed by not providing the stopper 60 on the swing frame 3F in the +y direction. Therefore, the occurrence of an uncomfortable feeling of the operator due to the stopper 60 suppressing tilting is reduced. That is, in the shovel 100, even if the stopper 60 is provided on the-Y direction side of the cab support region 30, the reduction in riding comfort for the operator can be sufficiently suppressed.

Fig. 7 (a) is a diagram showing the 1 st operation of the removal operation of the stopper 60. Fig. 7 (B) is a diagram showing the 2 nd operation of the removal operation of the stopper 60. Fig. 7 (C) is a diagram showing the 3 rd operation of the removal operation of the stopper 60. Fig. 7 (D) is a diagram showing the 4 th operation of the removal operation of the stopper 60. As shown in fig. 7, the stopper 60 according to the present embodiment is configured to be detachable from the shovel 100. For example, when the stopper 60 is replaced during maintenance or the like, or when the operator wants to remove the stopper 60 in order to further improve riding comfort, the operator performs the removal operation of the stopper 60.

In the removal operation of the stopper 60, the stopper 60 can be disengaged without removing the cab 10 from the revolving frame 3F. Specifically, in the removal operation of the stopper 60, the operator first removes the fixing bolts 63 that fix the base plate 611, as shown in fig. 7 (a). For example, the operator inserts a ratchet wrench (not shown) from the gap between the revolving frame 3F and the eave 114, and rotates the heads of the fixing bolts 63 to release the screwing of the 1 st inner vertical frame 35 by the fixing bolts 63. Thereby, the stopper 60 is free with respect to the revolving frame 3F.

Next, the operator grips the stopper 60 with an instrument such as pliers or his/her hand, and moves the stopper 60 toward the eave 114 side (-Y direction) of the cab 10 as shown in fig. 7 (B). Thereby, the base plate 611 is exposed from the gap between the revolving frame 3F and the eave 114.

Thereafter, the operator holds the base plate 611 and rotates the stopper 60 by tilting the base plate 611 upward as shown in fig. 7 (C). Thereby, the concave space 60s of the stopper 60 rotates around the eave 114, and the protruding plate portion 612 moves downward (the revolving frame 3F side).

Finally, as shown in fig. 7 (D), the operator rotates the stopper 60 further to take out the top plate 613 from the gap between the revolving frame 3F and the eave 114. Thus, the stopper 60 can be smoothly removed from the shovel 100. In the case where the stopper 60 is attached to the shovel 100, the stopper 60 is attached by performing an operation opposite to the above-described removal operation. The stopper 60 may be added to the conventional shovel 100 without the stopper 60.

As described above, the shovel 100 according to the present embodiment includes the stopper 60 between the revolving frame 3F and the cab 10, and can thereby easily suppress contact with the boom cylinder 7 in response to the swing of the cab 10. In particular, the shovel 100 can suppress a decrease in riding comfort for the operator as much as possible by providing the stopper 60, and the stopper 60 allows the swing of the cab 10 in a direction away from the boom cylinder 7. Further, by disposing the stopper 60 at a position adjacent to the boom cylinder 7, tilting of the cab 10 in the-Y direction can be more reliably suppressed. Further, by disposing the stopper 60 on the front side of the cab support area 30, tilting of the cab 10 can be satisfactorily suppressed even when the cab 10 swings obliquely forward or the like.

Further, the stopper 60 is provided so as to be detachable from the revolving frame 3F, and can be detached as needed. Thus, the stopper 60 can be simply used or not used depending on the operator's situation. At this time, the C-shaped stopper main body 61 can be rotated around the eave 114, and the stopper 60 can be easily taken out from the narrow gap. The stopper 60 may be provided so as not to be detachable with respect to the revolving frame 3F. For example, a projection, not shown, that functions as the stopper 60 may be connected to the upper surface of the revolving frame 3F.

The shovel 100 is not limited to the above-described embodiment, and various modifications may be employed. For example, the stopper 60 may be provided with a buffer member on the upper surface of the stopper body 61 or the lower surface of the floor panel 111. This can alleviate the impact when the floor panel 111 contacts the stopper main body 61 during the swing of the cab 10.

The shovel 100 according to the embodiments disclosed herein is illustrative in all respects and not restrictive. The embodiments can be modified and improved in various ways without departing from the scope and spirit of the appended claims. Other configurations can be adopted within the range of no contradiction with respect to the matters described in the above-described embodiments, and combinations can be made within the range of no contradiction.

Claims (10)

1. An excavator, comprising:

A lower traveling body;

An upper revolving structure having a revolving frame rotatably provided to the lower traveling body;

A boom cylinder provided to the upper revolving unit;

a control room provided in the upper revolving body at a position adjacent to the boom cylinder, for an operator to ride;

A plurality of holders fixed to the swing frame to swingably support the cab in a state of being lifted from the swing frame; and

A stopper arranged between the revolving frame and the control room,

The stopper is provided to suppress contact of the boom cylinder with the cab when the cab swings.

2. The excavator of claim 1, wherein,

The stopper is provided to allow the cab to swing in a direction away from the boom cylinder.

3. The excavator of claim 2, wherein,

The stopper is disposed on a frame adjacent to the boom cylinder in a cab support area of the cab supporting the revolving frame.

4. The excavator of claim 3, wherein,

The stopper is disposed further forward than a middle position in a front-rear direction of the cab support area.

5. The excavator according to any one of claims 1 to 4, wherein,

The stopper is disposed closer to the boom cylinder than the mount.

6. The excavator according to any one of claims 1 to 4, wherein,

The stopper may be taken out from a gap between the swing frame and the cab.

7. The excavator of claim 6, wherein,

The control room is provided with an eave part which is covered and arranged at the side of the stopper of the revolving frame,

The stopper is taken out from the swing frame by rotating in such a manner as to bypass the eaves.

8. The excavator according to any one of claims 1 to 4, wherein,

The stopper is fixed on the revolving frame by a plurality of fixing bolts,

The plurality of fixing bolts are arranged in a staggered manner along the length direction of the stopper.

9. The excavator according to any one of claims 1 to 4, wherein,

The stopper has a stopper body formed in a C-shape by a base plate portion fixed to the revolving frame, a protruding plate portion protruding in an orthogonal direction from the base plate portion, and a top plate portion protruding in an orthogonal direction from the protruding plate portion.

10. The excavator of claim 9, wherein,

The stopper includes a reinforcing rib provided on the inner side of the stopper body and connected to the base plate portion, the protruding plate portion, and the top plate portion, respectively.