CN104812964A - Boom assembly for construction machines - Google Patents

Abstract

A boom assembly for a construction machine may comprise a first (170) and a second side barrier (270) including a first (172) and a second pin receiving groove (182), respectively. The second side barrier (180) being spaced apart the first side barrier (170) for defining a boom mounting portion (60) therebetween. A boom (28) including a pin receiving bore (92) may be disposed within the boom mounting portion (60), such that the pin receiving bore (92) is aligned with the first and second pin receiving grooves (172, 182). A boom mounting pin (94) may extend through the pin receiving bore (92), the first and second pin receiving grooves (172, 182). A first (178) and a second mounting member (188) may be mounted on the boom mounting pin (94) at the first and second pin receiving grooves (172, 182), respectively, and may be removably attached to the first and second side barriers (170, 180), respectively.

Description

Cantilever components for construction machinery

technical field

The present invention generally relates to a boom assembly for a construction machine and a method for mounting the boom to the construction machine.

Background technique

Construction machines (eg, wheel or track excavators, wheel loaders, backhoes, etc.) may be provided with booms and bars for receiving work tools, such as buckets, in order to perform certain operations.

The boom is typically operably mounted to the construction machine by boom mounting pins that extend through corresponding holes in the chassis of the construction machine and through the boom.

US 2006/0275074 A1 discloses a link pin that incorporates mechanical deformation to form a joint, wherein the parts are arranged in a specific direction in order to provide optimum durability.

A loader attachment pivot pin assembly is known from US 6 694 571 B2. The pivot pin assembly is formed by providing a cylindrical pin portion having a boss on one end, the cylindrical pin portion having a flat shoulder surface so that its outer edge is non-circular.

US 5 630 673 A discloses a pivot joint assembly which mounts a first member to a second member for relative rotation therebetween. The first member is positioned between a pair of brackets defined by the second member, and the two members define a plurality of apertures aligned on a common axis.

The present invention aims, at least in part, to improve or overcome one or more aspects of previous systems.

Contents of the invention

According to an aspect of the present invention, a boom assembly for a construction machine may include a first side barrier including a first pin receiving slot and a second side spaced from the first side barrier for defining a boom mounting portion therebetween barrier. The second side barrier includes a second pin receiving slot. The boom may include pin receiving holes and may be disposed within the boom mounting portion such that the pin receiving holes may be aligned with the first pin receiving slot and the second pin receiving slot. The cantilever mounting pin can extend through the pin receiving hole, the first pin receiving slot, and the second pin receiving slot. The first mounting member is mountable on the cantilever mounting pin at the first pin receiving slot and can be removably attached to the first side barrier, while the second mounting member is mountable on the cantilever mounting at the second pin receiving slot pins and can be detachably attached to the second side barrier.

According to another aspect of the invention, a method for assembling a boom assembly is disclosed. The boom assembly may include a first side barrier including a first pin receiving slot and a second side barrier spaced from the first side barrier for defining a boom mounting portion therebetween, wherein the second side barrier may A second pin receiving slot aligned with the first pin receiving slot is included. The disclosed exemplary method may include: inserting a boom mounting pin into a pin receiving hole of the boom such that the boom mounting pin protrudes at least partially from the pin receiving hole on both sides; positioning the boom within the boom mounting portion such that the boom mounting pin At least partially received by the first pin receiving slot and at least partially received by the second pin receiving slot. The method may further include: mounting a first mounting member on the cantilever mounting pin at the first pin receiving slot, and removably attaching the first mounting member to the first side barrier; and attaching the second mounting member to the first side barrier. The mounting member is mounted on the cantilever mounting pin at the second pin receiving slot and removably attaches the second mounting member to the second side barrier.

According to another aspect of the present invention, a boom assembly may include: a first side barrier; a second side barrier spaced apart from said first side barrier for defining a boom mounting portion therebetween; a boom including a pin receiving hole and be arranged in the cantilever mounting part; the cantilever mounting pin, which extends through the pin receiving hole and is configured to protrude from the pin receiving hole at least partially on both sides; the first mounting member, which is installed on the first extension of the cantilever mounting pin and a second mounting member mounted on a second protruding side of the cantilever mounting pin opposite to the first protruding side. The first mounting member may be detachably attached to the first side screen, and the second mounting member may be detachably attached to the second side screen.

According to another aspect of the present invention, the boom assembly may include: a first side barrier including a first pin receiving aperture; a second side barrier spaced apart from said first side barrier for defining a boom mounting portion therebetween, and comprising a second pin receiving hole aligned with said first pin receiving hole; a cantilever arm disposed within the cantilever mounting portion and comprising a cantilever receiving slot aligned with the first pin receiving hole and the second pin receiving hole; the cantilever mounted a pin extending through the first pin receiving hole, the second pin receiving hole and the pin receiving slot; and a boom mounting member mounted on the boom mounting pin at the pin receiving slot and detachably attached to the boom.

According to another aspect of the invention, a superstructure of a construction machine may comprise a boom assembly according to the invention.

In some embodiments, the second mounting member may be integrally formed with the second side barrier at the second pin receiving slot, thereby forming a pin receiving hole. In these embodiments, the cantilever mounting pin may extend through the first mounting slot, the pin receiving hole of the cantilever, and the pin receiving hole of the second side barrier.

Other features and aspects of the invention will become apparent from the following description and accompanying drawings.

Description of drawings

Figure 1 is a side view of a construction machine including a boom;

Fig. 2 is a top view of the construction machine in Fig. 1 without a cantilever;

Figure 3 is an exploded view of the boom assembly according to the first embodiment;

Figure 4 is an exploded view of a boom assembly according to a second embodiment;

Figure 5 is an exploded view of a boom assembly according to a third embodiment;

Figure 6 is an exploded view of a boom assembly according to a fourth embodiment;

Figure 7 is a front view of an embodiment of a cantilever mounting pin; and

Figure 8 is a perspective view of another embodiment of a cantilever mounting pin.

Detailed ways

The following is a detailed description of exemplary embodiments of the present invention. The exemplary embodiments described therein and shown in the drawings are intended to teach the principles of the invention and enable one of ordinary skill in the art to make and use the invention in many different environments and for many different applications. Accordingly, the exemplary embodiments are not intended and should not be construed as a limiting description of the scope of protection. Rather, the scope of patent protection shall be defined by the appended claims.

The invention may be based in part on the insertion of a boom mounting pin into a boom, and subsequently, placing the boom with the pre-assembled boom mounting pin into a boom mounting part of a construction machine that provides a corresponding Pin storage slots to aid in attaching the boom to construction machinery. In particular, the alignment of the pin-receiving holes of the boom and the pin-receiving holes of the chassis of the construction machine can at least partially disappear.

Referring to FIG. 1 , a construction machine 10 , such as a wheeled excavator, is shown. The construction machine 10 includes a power source, such as an internal combustion engine 12 . The construction machine 10 further comprises a superstructure 14 which is rotatably attached to an undercarriage 16 via a swivel 15 . Alternatively, the superstructure 14 may be fixedly mounted to the chassis 16 or in any suitable manner or configuration.

The construction machine 10 also includes a traction system 18 , such as sets of wheels 24 , 26 , operatively attached to the chassis 16 . At least one set of wheels is steerable.

While the traction system 18 has been shown as including wheels, the invention is also applicable to construction machines or vehicles having one or more endless tracks and/or belts, or any other type of traction device. Furthermore, the invention is applicable to steering systems that vary the steering angle of one or more traction devices, as well as skid steer and differential steering systems. Furthermore, these systems are applicable to work machines with various types of tracks and devices. For example, while track-type work machines are typically configured with a skid steer or differential steering system, they may be automatically or additionally configured with a steering system that changes the steering angle of one or more tracks. Similarly, wheeled work machines or vehicles may be steered via variable steering angle systems, skid steering, and/or differential steering systems.

Construction machine 10 , shown in FIG. 1 as a wheeled excavator, may be any type of work machine with operator-controlled steering and travel. For example, construction machine 10 may include wheel loaders, motor graders, backhoe loaders, skid steers, track tractors, track excavators, material handlers, cranes, and any other type of machine with operator controls. Steering and traveling work machinery.

In some embodiments, construction machine 10 may include a cab lift function by which operator station 14 may be raised and lowered relative to underframe 16 . Alternatively or additionally, the cab lift function may cause the operator station 22 to be raised and lowered relative to the superstructure 14 . The cab lift function is hydraulically actuatable.

The construction machine 10 further includes a work tool 20 and an operator station 22 from which the work tool 20 is controlled. Work tool 20 may be any type of work tool and may include any type of work implement, eg, buckets, blades, grapples, jackhammers, shears, and the like.

As shown in FIG. 1 , work tool 20 includes a boom 28 , a rod 30 , and a work tool 32 attached to an end of rod 30 . The boom 28 is pivotally attached to the superstructure 14 . At least one boom actuator 34 is attached to the superstructure 14 and the boom 28 such that actuation of the boom actuator 34 raises and lowers the distal end 36 of the boom 28 .

The distal end 36 of the boom 28 is also moved side to side. In the exemplary embodiment shown, boom 28 is moved side to side by rotating superstructure 14 about axis 38 relative to chassis 16 in the direction indicated by arrow 40 . The construction machine 10 may also include an offset boom feature by which the boom 28 may be pivoted side to side relative to the superstructure 14 .

Rod 30 is pivotally attached to proximal end 42 of boom 28 . A lever actuator 44 is attached to the boom 28 and the lever 30 such that actuation of the lever actuator 44 causes the lever 30 to extend and retract relative to the boom 28 in a jackknife manner. That is, the distal end 46 of the rod 30 is extended further away from the chassis 12 and retracted closer to the chassis 16 by actuating the rod actuator 44 .

Work tool 32 is attached to distal end 46 of rod 30 . Although work tool 32 has been shown in FIG. 1 as a bucket 48 , work tool 32 may be any type of work tool. Work tool 32 is pivotally attached to distal end 46 of rod 30 . Work tool pivot actuator 50 is attached to lever 30 and work tool 32 such that actuation of work tool pivot actuator 50 causes work tool 32 to pivot relative to lever 30 .

Boom actuator 34 , rod actuator 44 and work tool pivot actuator 50 may be any type of actuator, such as a hydraulic cylinder, as shown in FIG. 1 . Each hydraulic cylinder can be associated with its own hydraulic circuit so that it can be controlled independently. Certain work tools, such as bucket 48 , may have a single actuator and thus be controlled by a single hydraulic circuit. Other types of work tools, such as grapples, may contain more than one actuator and thus be controlled by more than one hydraulic circuit. For example, a grab can be controlled by two or more hydraulic circuits. One circuit controls work tool pivot actuator 50 which pivots the grapple in the same manner as bucket 48 . In addition, a second loop can control auxiliary functions, such as the rotation of the grapple.

Referring now to FIG. 2 , a top view of the construction machine of FIG. 1 is shown. In particular, a top view of the superstructure 14 is shown without booms attached. An operator station 22 is depicted from which an operator can control operation of the construction machine 10 .

Construction machine 10 is provided with a boom mounting portion 60 configured to receive a boom (not explicitly shown in FIG. 2 ) and provide space for movement of the boom relative to superstructure 14 .

The superstructure 14 may include a base frame including a first side barrier 70 and a second side barrier 80 for housing the boom 28 and at least one boom actuator 34 (see FIG. 1 ). As indicated by the dashed lines, the first and second side barriers 70 , 80 may extend from the back side to the front side of the construction machine 10 .

In the embodiment shown in FIG. 2 , the first side barrier 70 includes pin receiving slots 72 and the second side barrier 80 includes pin receiving holes 82 indicated by dashed lines. Pin receiving slots 72 and barrier holes 82 are aligned with one another (indicated by axis 62 ) and are configured to receive boom mounting pins 94 (see, eg, FIG. 3 ) for mounting boom 28 to the base frame of superstructure 14 .

Referring to FIG. 3 , an exploded view of a first embodiment of the boom assembly 90 is shown. The first side barrier 70 provides two mounting surfaces 73 , 74 configured to receive a mounting member 78 . In particular, both mounting surfaces 73 , 74 include at least one aperture 75 , 76 configured to receive, for example, a screw configured to removably attach a mounting member 78 to the first side barrier 70 . Accordingly, the mounting member 78 comprises at least two holes corresponding to said at least two holes 75 , 76 .

In some embodiments, the mounting member 78 may be fixedly attached to the first side barrier 70 by, for example, welding, brazing, riveting, bonding, or any other suitable means known in the art.

As further shown in FIG. 3 , the mounting member 78 may also include a pin receiving slot 79 corresponding to the pin receiving slot 72 of the first side barrier 70 . It should be appreciated that pin receiving slot 72 and pin receiving slot 79 together form a cylindrical opening for receiving cantilever mounting pin 94 .

The boom 28 includes pin receiving holes 92 at the ends thereof at which the boom 92 is mounted to the superstructure 14 (see FIG. 1 ). The pin receiving aperture 92 is configured to receive a cantilever mounting pin 94 through the axis 64 . The pin receiving aperture 92 may include a diameter substantially corresponding to the diameter of the cantilever mounting pin 94 .

The cantilever mounting pin 94 is further configured to be disposed within the pin receiving slot 72 and the pin receiving hole 82 , as will be described in more detail below. The cantilever mounting pin 94 includes a length that is at least the distance between the first side barrier 70 and the second side barrier 80 . Preferably, the cantilever mounting pin 94 includes a length such that the cantilever mounting pin 94 extends beyond the cantilever mounting portion 60 from the pin receiving slot 72 into the pin receiving hole 82 .

Referring to FIG. 4 , an exploded view of a second embodiment of the boom assembly 90 is shown. The first side barrier 170 of the second embodiment is the same as the first side barrier 70 of the first embodiment. Elements of the first side member 170 are identified by the same reference numerals as the first side screen 70, but with the prefix "1".

According to the second embodiment, the second side screen 180 is similar to the first side screen 170 such that the second side screen 180 includes two mounting surfaces 183 , 184 configured to receive mounting members 188 . In particular, both mounting surfaces 183\184 include at least one aperture 185, 186 configured to receive, for example, a screw configured to removably attach a mounting member 188 to the second side barrier 180.

Referring to FIG. 5 , an exploded view of a third embodiment of a boom assembly 90 is shown. According to the third embodiment, the first side barrier 270 includes a first hole 275 and a second hole 276 . The first hole 275 and the second hole 276 are configured to receive, for example, screws configured to fixedly attach the mounting member 278 to the first side barrier 270 . The second side barrier 280 includes a first hole 285 and a second hole 286 . The first hole 285 and the second hole 286 are configured to receive, for example, screws configured to removably attach the mounting member 288 to the first side barrier 280 .

Each mounting member 278, 288 includes a pin receiving aperture 272, 282, respectively. Pin receiving apertures 272 , 282 are aligned with each other (indicated by axis 62 ) and are configured to mount on cantilever mounting pin 94 .

Referring to FIG. 6 , an exploded view of a fourth embodiment of a boom assembly 190 is shown. The second side barrier 380 is the same as the second side barrier 80 of the first embodiment shown in FIG. 3 . Accordingly, elements of the second side member 380 are identified by the same reference numerals as the second side screen 80, but with the prefix "3".

According to the fourth embodiment, the first side shield 370 includes a shield aperture 372 configured to align with the pin receiving aperture 382 of the second side shield 380 (indicated by axis 62 ) and receive the cantilever mounting pin 94 .

The fourth embodiment boom 328 includes pin receiving slots 192 configured to receive boom mounting pins 94 . A cantilever mounting member 395 including a pin receiving slot 393 corresponding to the pin receiving slot 192 is configured to mount on the cantilever mounting pin 94 and is detachably connected by, for example, four screws received by corresponding holes 396, 397, 398 and 399. Attached to boom 328. In some embodiments, cantilever mounting member 395 may be removably attached to cantilever 328 by more or less than four screws. In some other embodiments, cantilever mounting member 395 may be fixedly attached to cantilever 328 by means of, for example, welding, brazing, riveting, adhesives, or any other suitable means known in the art.

As shown in FIGS. 3-6 , the boom mounting pin 94 includes a cylindrical shape that corresponds to the shape of corresponding pin receiving slots and pin receiving holes at the side barrier, mounting member, and/or boom. In some embodiments, a bearing sleeve (not shown) may be provided between the boom mounting pin 94 and the pin receiving hole 92 at the boom 28 to provide rotational movement of the boom 28 relative to the boom mounting pin 94 .

Referring to FIG. 7 , another embodiment of a cantilever mounting pin 194 is shown. Cantilever mounting pin 194 includes a cylindrical portion 195 and a flat portion 195 . The flat portion 195 is configured to limit the rotation of the boom mounting pin 194 during movement of the boom 28 after the boom 28 is assembled to the side barrier. Accordingly, corresponding pin-receiving slots and pin-receiving holes at the side barriers, mounting members, and/or booms may also include flattened portions for completely corresponding to the shape of the boom mounting pins 194 such that the boom mounting pins 194 are fixedly fastened. to the side barrier.

With respect to FIG. 8 , another embodiment of a cantilever mounting pin 294 is depicted. Cantilever mounting pin 294 includes a first portion 295 having a first diameter, a second portion 296 having a second diameter, and a third portion 297 having a third diameter. The first and third diameters may be equal, wherein the second diameter may be greater than the first and third diameters. Accordingly, the cantilever mounting pin 294 of FIG. 9 is provided in a stepped shape.

The first portion 295 and the third portion 297 include a length corresponding to the length of the pin receiving groove and/or the pin receiving hole, wherein the second portion 296 includes a length substantially corresponding to the length of the first side barrier and the second side barrier. The distance between the two side barriers.

In some embodiments, the cantilever mounting pin 294 may only include a first portion 295 and a second portion 296 having unequal diameters.

Industrial Applicability

In the following, an exemplary embodiment of a method for mounting a boom to a construction machine such as a wheeled excavator may be described with reference to FIGS. 1 to 8

A first embodiment for mounting the boom 28 to the chassis of a construction machine (such as the first side barrier 70 and the second side barrier 80 ) is described with reference to FIG. 3 . In a first assembly step, the cantilever mounting pin 94 is inserted into the pin receiving hole 92 of the cantilever 28 such that one end face of the cantilever mounting pin 94 is coplanar with one end face of the cantilever 28 facing the pin receiving hole 82 of the second side barrier 80 . Thus, the cantilever mounting pin 94 at least partially protrudes from the pin receiving aperture 92 on the side facing the pin receiving slot 72 . Subsequently, the cantilever 28 is positioned within the cantilever mounting portion 60 such that the at least partially protruding cantilever mounting pin is received in the pin receiving slot 72 and the pin receiving hole 92 of the cantilever 28 is aligned with the pin receiving hole of the second side barrier 80 82 aligned.

Next, the cantilever mounting pin 94 is slid into the pin receiving hole 82 from the protruding side of the cantilever mounting pin 94 such that the cantilever mounting pin 94 is at least partially disposed within the pin receiving slot 72 and at least partially disposed in the pin receiving hole 82 Inside. In some embodiments, at least one cotter pin (not shown in the figures) may be used for preventing the cantilever mounting pin from exiting the pin receiving slot 72 and the pin receiving hole 82 .

In a final step, the mounting member 78 is mounted on the cantilever mounting pin 94 at the pin receiving slot 72 and removably attached to the mounting surfaces 73, 74 by, for example, two screws. For example, to ensure a rigid attachment of the boom 28 to the construction machine 10, the screws may have a size of M36 or larger.

With respect to FIG. 4 , a second embodiment (such as first side barrier 170 and second side barrier 180 ) for mounting boom 28 to the chassis of a construction machine is described. First, the boom mounting pin 94 is inserted into the pin receiving hole 92 of the boom 28 such that the boom mounting pin 94 protrudes at least partially from both sides of the pin receiving hole 92 .

The boom 28 is then positioned within the boom mounting portion 60 such that the two projecting ends of the boom mounting pin 92 are received within the two pin receiving slots 172 , 182 . Then, in a final step, mounting members 178, 188 are mounted on cantilever mounting pins 94 at pin receiving slots 172, 182, respectively, and removably attached to mounting surfaces 73, 74, and 183, respectively, by screws. 784.

With respect to FIG. 5 , a third embodiment for mounting the boom 28 to the chassis of a construction machine (such as a first side barrier 270 and a second side barrier 280 ) is illustrated. First, the cantilever mounting pin 94 is inserted into the pin receiving hole 92 such that the cantilever mounting pin 94 at least partially protrudes from the pin receiving hole 92 on both sides.

Subsequently, the two mounting members 278 , 288 are mounted on the boom mounting pin 92 at both projecting ends of the boom mounting pin 94 , ie, the boom mounting pin 94 is further received within the pin receiving holes 272 , 282 .

The boom 28 is then positioned within the boom mounting portion 60 such that the attachment holes of the mounting members 278 , 288 align with the holes 275 , 276 and 285 , 286 of the respective side barriers 270 , 280 . In a final step, the two mounting members 272, 282 are fastened to the side barriers 270, 280 by eg corresponding screws.

A fourth embodiment (eg, first side barrier 370 and second side barrier 380 ) for mounting boom 28 to the chassis of a construction machine is described with respect to FIG. 6 . First, the cantilever mounting pin 94 is inserted into the pin receiving hole 372 of the first side barrier 370 and into the pin receiving hole 382 of the second side barrier 380 . The boom 28 is then positioned within the boom mounting portion 60 such that the boom's pin receiving slot 192 fits over the boom mounting pin 94 . Then, the boom mounting member 395 is also provided in the boom mounting portion 60 so that the pin receiving groove 393 is also mounted on the boom mounting pin 94 at the side opposite to the side of the mounting pin receiving groove 92 . In a final step, the boom mounting member 395 may be removably attached to the boom 28 by, for example, screws.

In the above-described embodiments, screws having a size of M36 or larger may be used for mounting the boom to the chassis of the construction machine.

It should be stated that the above-described method for mounting a boom to a construction machine is not limited to construction machines having at least two side barriers. In some embodiments, the two side barriers may be integrally formed with the chassis of the superstructure or the chassis of the construction machine. Thus, any of said pin receiving slots and pin receiving holes may also be provided at the chassis of the construction machine so that mounting the boom to the construction machine is still facilitated.

While preferred embodiments of the invention have been described herein, improvements and modifications can be made without departing from the scope of the following claims.

Claims (15)

CLAIMS 1. A boom assembly (90) for a construction machine (10) comprising: a first side barrier (70; 170) comprising a first pin receiving slot (72; 172); a second side barrier (80; 180) spaced from said first side barrier (70; 170) for defining a cantilevered mounting portion (60) therebetween and comprising a second pin receiving slot (182); a cantilever (28) comprising a pin receiving hole (92) disposed within said cantilever mounting portion (60), said pin receiving hole (92) being connected to said first pin receiving groove (72; 172) and said The second pin receiving groove (182) is aligned; a cantilever mounting pin (94; 194, 294) extending through said pin receiving aperture (92), said first pin receiving slot (72; 172, 182) and said second pin receiving slot (182); A first mounting member (78; 178) mounted on said cantilever mounting pin (94; 194; 294) at said first pin receiving slot (72; 172) and detachably attached to said first side barrier (70; 170); and A second mounting member (188) mounted on said cantilevered mounting pin (94; 194; 294) at said second pin receiving slot (182) and removably attached to said second side barrier (80; 180). 2. The boom assembly (90) of claim 1, wherein said second mounting member (188) engages said second side barrier (80; 180) at said second pin receiving slot (182) Integrally formed to form a pin receiving hole (82). 3. The boom assembly (90) of any one of the preceding claims, wherein at least one of said first mounting member (78; 178) and said second mounting member (188) comprises a corresponding grooves in the shape of the cantilever mounting pins (94; 194; 294) described above. 4. A boom assembly (90) as claimed in any one of the preceding claims, wherein the boom mounting pin (94; 194; 294) comprises a flat portion (196) at least at one end thereof. 5. The boom assembly (90) of any one of the preceding claims, wherein the boom mounting pin (94; 194; 294) comprises a first end having a first diameter and connected to the first end A second end opposite and having a second diameter, the first diameter being unequal to the second diameter. 6. The boom assembly (90) according to any one of claims 1 to 4, wherein said boom mounting pin (94; 194; 294) comprises a first end having a first diameter, and said second A second end opposite the first diameter and having the first diameter and an intermediate portion having a third diameter, the first diameter being unequal to the third diameter. 7. The boom assembly (90) according to any one of the preceding claims, wherein at least one of the first mounting member (78; 178) and the second mounting member (188) is mounted by at least one screw Removably attached to said first side barrier (70; 170) and said second side barrier (80; 180). 8. The boom assembly (90) of any one of the preceding claims, wherein the boom (28) comprises a width substantially corresponding to the boom mounting portion (60). 9. A superstructure (14) of a construction machine (10) comprising a boom assembly (90) according to any one of the preceding claims. 10. The superstructure (14) of claim 9, further comprising at least one boom actuator (34) configured to raise or lower the boom (28). 11. The superstructure (14) according to claim 10, wherein one end of said at least one cantilever actuator (34) is attached to said first side barrier (70; 170) or said second A side barrier (80; 180) and attaches the other end of said at least one boom actuator (34) to said boom (28). 12. A method for assembling said cantilever assembly (90), said cantilever assembly (90) comprising a first side barrier (70; 170) and a second side barrier (80; 180), said first side The barrier (70; 170) includes a first pin receiving slot (72; 172), said second side barrier (80; 180) is spaced from said first side barrier (70; 170) for defining a cantilever therebetween Mounting part (60), said second side barrier (80; 180) including a second pin receiving slot (182) aligned with said first pin receiving slot (72; 172), said method comprising: Inserting the boom mounting pin (94; 194; 294) into the pin receiving hole (92) of the boom (28) such that the boom mounting pin (94; 194; 294) is at least partially received from the pin on both sides The hole (92) protrudes; Positioning said boom (28) within said boom mounting portion (60) such that said boom mounting pin (94; 194; 294) is at least partially bounded by said first pin receiving slot (72; 172) and said boom mounting pin (94; 194; 294) The second pin receiving groove (182) is accommodated; mounting a first mounting member (78; 178) on said cantilever mounting pin (94; 194; 294) at said first pin receiving slot (72; 172), and placing said first mounting member (78 ; 178) detachably attached to said first side barrier (70; 170); and mounting a second mounting member (188) on said cantilever mounting pin (94; 194; 294) at said second pin receiving slot (182), and removably attaching said second mounting member (188) Attached to said second side barrier (80; 180). 13. The method of claim 12, wherein the second mounting member (188) is integrally formed with the second side barrier (80; 180) forming a pin receiving hole (82), the method Further includes: Slide the cantilever mounting pin (94) into the barrier hole (82). 14. A cantilever assembly (10) comprising: first side barrier (270); a second side barrier (280) spaced from said first side barrier (270) for defining a cantilevered mounting portion (60) therebetween; a boom (28) including pin receiving holes (92) and disposed within said boom mounting portion (60), cantilever mounting pins (94; 194; 294) extending through said pin receiving aperture (92) and configured to project at least partially from said pin receiving aperture (92) on both sides; A first mounting member (278) mounted at a first protruding side of said cantilever mounting pin (94; 194; 294), said first mounting member (278) being detachably attached to said first side barriers (270); and A second mounting member (288) mounted at a second projecting side of said cantilever mounting pin (94; 194; 294) opposite said first projecting side, said second mounting member (288) Removably attached to the second side barrier (280). 15. A cantilever assembly (190) comprising: a first side barrier (370) including a first pin receiving aperture (372); A second side barrier (380) spaced apart from said first side barrier (370) for defining a cantilevered mounting portion (60) therebetween, the second side barrier (380) comprising a pin receiving hole associated with said first side barrier (372) aligned second pin receiving holes (382); a cantilever (28) disposed within said cantilever mounting portion (60) and comprising a cantilever receiving slot (192) aligned with said first pin receiving hole (372) and said second pin receiving hole (382) ; cantilever mounting pins (94; 194; 294) extending through said first pin receiving aperture (372), said second pin receiving aperture (382) and said pin receiving slot (192); and A cantilever mounting member (395) mounted on said cantilever mounting pin (94; 194; 294) at said pin receiving slot (192) and detachably attached to said cantilever (28).