JPH0674651U - Short loader - Google Patents

Abstract

(57) [Summary] [Purpose] In the short loader of the related art, one boom cylinder is arranged between one end of a bracket fixed to the abdominal surface of the boom and the front of the upper swing body, and Since the arm cylinder is arranged between the lower part of the arm base end part and the other end part of the bracket, the total length of the boom was considerably long. Therefore, the work radius of the short loader is large, and the balance of the vehicle body is poor, which hinders the loader work. This problem is solved. [Structure] In the short loader of the present invention, one end is connected to the arm cylinder at the lower part of the arm base end of the work attachment, and the other end of the arm cylinder is inside the boom tip side and the back of the boom is attached. It was constructed by connecting to the inside position of the plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a short loader in which a backhoe work and a loader work are selectively performed by reversing and replacing a bucket attached to a tip of a work attachment of a construction machine.

[0002]

[Prior art]

 FIG. 3 is a side view of a prior art short loader. In the figure, 1 is a lower traveling body of the short loader, 2 is an upper swing body, 3 is a work attachment mounted on the front portion of the upper swing body 2, 4 is a boom of the work attachment 3, 5 is an arm, 6 is a bucket, 7 Is a bucket link, 8 is an idler link, 9 is a boom cylinder, 10 is an arm cylinder, 11 is a bucket cylinder, and 12 is a pin coupling part that connects the boom (4) tip part and the arm (5) base end part. is there. FIG. 4 is a perspective view of a main part of the work attachment 3 in FIG. FIG. 5 is a side view showing a state in which the bucket 6 of the short loader in FIG. 3 is reversed and replaced (the bucket 6 is reversed by 180 ° in the front-rear direction and replaced).

As shown in FIGS. 3 to 5, in the conventional short loader, the boom 4, the arm 5 and the bucket 6 are sequentially connected to the front portion of the upper swing body 2, and the belly portion of the boom 4 and the upper swing body are rotated. One boom cylinder 9 is arranged between the front part of the body 2 and the arm cylinder 10 is arranged below the pin coupling part 12 between the tip of the boom (4) and the base of the arm (5). The backhoe work and the loader work are selectively performed by reversing and replacing the bucket 6 attached to the tip of the arm (5).

[0004]

[Problems to be solved by the device]

 In the conventional short loader, as shown in FIG. 3, one boom cylinder 9 is arranged between one end of the bracket 13 fixed to the abdominal surface of the boom 4 and the front of the upper swing body 2. Moreover, since the arm cylinder 10 is arranged between the lower part of the base end of the arm (5) and the other end of the bracket 13, the total length L of the boom 4 is considerably long. Moreover, since the loader work is performed in the bucket 6, the mouth width dimension W (shown in FIG. 4) of the bucket 6 must be increased. . Therefore, the work radius R from the turning center OO of the upper-part turning body 2 (shown in FIG. 3) and the bucket capacity are large, so that the stability of the short loader is poor and the loader work is hindered.

[0005]

[Means for Solving the Problems]

 In the short loader of the present invention, the bucket attached to the arm tip portion of the work attachment is inverted and replaced to perform backhoe work and loader work selectively. The arm cylinder is connected to one end of the arm cylinder, and the other end of the arm cylinder is connected to the inside of the boom back plate inside the boom tip end side.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a main part of a short loader of the present invention. In the figure, 1'is the lower traveling body of the short loader, 2'is the upper rotating body, 14 is the work attachment mounted on the front part of the upper rotating body 2 ', 15 is the boom of the work attachment 14, and 5'is Arm, 6'bucket, 7'bucket link, 8'idler link, 9'boom cylinder, 16 arm cylinder, 11 'bucket cylinder, 12' boom (15) tip and arm (5) ') It is a pin coupling part that connects the base end. FIG. 2 is a side view of an essential part showing a state in which the bucket 6'of the short loader in FIG. 1 is inverted and replaced.

Next, the configuration of the short loader of the present invention will be described with reference to FIG. In the short loader of the present invention, one end of the arm cylinder 16 (bottom base end in this embodiment shown in FIG. 1) is connected to the lower part of the base end of the arm (5 ′) of the work attachment 14, and The other end of the arm cylinder 16 (rod end in this embodiment shown in FIG. 1) is connected to the inside position a of the back plate 17 of the boom 15 inside the boom (15) end.

Next, the operation of the short loader of the present invention will be described. In the present invention, the rod-side tip of the arm cylinder 16 is connected to the inside position a of the back plate 17 of the boom 15 inside the boom (15) tip side. The inside position a is the rod tip of the boom cylinder 9 '. The position is behind the coupling position b by a dimension l (shown in FIG. 1). Therefore, it is possible to make the total length L'of the boom 15 shorter than the total length L of the boom 4 of the prior art. That is, since the working radius R'from the swing center 0-0 of the upper swing body 2'can be set to be relatively small, the stability of the short loader can be improved without reducing the bucket capacity. Further, as shown in FIG. 2, the backhoe work can be performed by reversing and replacing the bucket 6'mounted on the tip of the arm (5 ') without any trouble.

[0009]

[Effect of device]

 In the conventional short loader, one boom cylinder is arranged between one end of a bracket fixed to the abdominal surface of the boom and the front part of the upper swing body, and the lower part of the arm base end and the bracket. Since the arm cylinder is placed between the boom and the other end, the length of the boom was considerably long. Therefore, the work radius of the short loader was large, and the balance of the vehicle body was poor, which hindered the loader work. However, in the short loader of the present proposal, one end of the arm cylinder is connected to the lower part of the arm base end of the work attachment, and the other end of the arm cylinder is connected to the inside of the boom tip side of the boom. It was configured by connecting to the inside position of the back plate. As a result, the inside position of the back plate of the boom connecting the other end of the arm cylinder is located behind the rod tip connecting position of the boom cylinder. That is, it is possible to set the working radius to be relatively small by making the entire length of the boom shorter than that of the boom of the prior art. Therefore, the stability of the short loader can be improved and the loader work efficiency can be improved without reducing the bucket capacity. Further, since the other end of the arm cylinder is connected to the inside of the back plate of the boom inside the boom tip side, the extension / contraction stroke amount of the arm cylinder can be made shorter than that of the conventional arm cylinder. Therefore, the weight and cost of the short loader can be reduced. The function of the short loader can be exhibited by attaching the boom of the present invention to the so-called mini excavator, for example, via a swing bracket.

[Brief description of drawings]

FIG. 1 is a side view of essential parts of a short loader of the present invention.

FIG. 2 is a side view of an essential part showing a state in which the bucket of the short loader in FIG. 1 is reversely attached and replaced.

FIG. 3 is a side view of a prior art short loader.

FIG. 4 is a perspective view of a main part of the work attachment in FIG.

FIG. 5 is a side view showing a state in which the bucket of the short loader in FIG. 3 is reversed and replaced.

[Explanation of symbols]

 2,2 'Upper revolving structure 3,14 Work attachment 4,15 Boom 5,5' Arm 6,6 'Bucket 9,9' Boom cylinder 10,16 Arm cylinder 12,12 'Pin joint 17 Back plate

Claims (1)

[Scope of utility model registration request] 1. A boom, an arm, and a bucket are sequentially connected to a front portion of an upper swing body, and a single boom cylinder is arranged between a ventral surface portion of the boom and a front portion of the upper swing body, and a boom tip portion. An arm cylinder is placed below the pin coupling part between the arm and the base end of the arm, and the backhoe work and loader work are selectively performed by reversing and replacing the bucket attached to the arm front end. In the loader, one end of the arm cylinder is connected to the lower part of the base end of the arm, and the other end of the arm cylinder is connected to the boom back plate position inside the boom tip side. loader.