WO1997031159A1

WO1997031159A1 - Working machine for hydraulic excavator

Info

Publication number: WO1997031159A1
Application number: PCT/JP1997/000500
Authority: WO
Inventors: Masahiko Hamaguchi
Original assignee: Komatsu Ltd.
Priority date: 1996-02-21
Filing date: 1997-02-21
Publication date: 1997-08-28
Also published as: JPH09287163A

Abstract

Engaging portion pressure between an engaging member for engagement with a working tool such as a bucket and a pin is reduced to make a quick coupler light and improve durability of the coupler and to enable simple and ready interchange with other working tools having different mount holes. A working machine for a hydraulic excavator provided with a working tool (35) such as boom, arm and bucket connected to a vehicle body in this order, an engaging link (1) connected to one side of the working tool and adapted to engage with a working machine link (38), and an engaging member (2) connected to the other side of the working tool and adapted to engage with an arm (33) comprises right and left pins (3a, 3b) secured to one side of right and left brackets (35a, 35b) of the working tool, slit portions (2a, 2b) having a smaller width than a maximum diameter of the pins being inserted thereinto, and the engaging member (2) having fixing portions (2c, 2d) for fixing the pins. The engaging link (1) is secured at its one end to the engaging member and is provided at its other end with a slot (1a), and a third pin (39) is used to engage the other sides of the right and left brackets with the working machine link (38).

Description

Description Excavator work equipment Technical field

The present invention relates to a working machine of a hydraulic shovel in which a working tool such as a bucket or a breaker is detachably provided at an end of an arm of the working machine of a hydraulic shovel via an engagement link.

Background technology

Hydraulic excavators are widely used for gravel and soil extraction, road construction, field maintenance, land reclamation, water and sewage works, and building foundation works. In addition to the various baguettes used for these operations, various types of work equipment such as hydraulic breakers and crushers have been developed and provided. In general, in the case of small-scale construction, the number of hydraulic excavators to be input is small, and it is necessary to carry out a number of operations with one hydraulic excavator. The effective use of attachments allows efficient construction.

A conventional hydraulic excavator will be described with reference to FIG.

An upper revolving body 23 is mounted on a lower traveling body 21 of the excavator 20 via a revolving circle 22. The upper rotating body 23 can be turned by a turning motor (not shown). A work machine 30 is attached to the upper swing body 23. The work machine 30 includes a boom 31, an arm 33, and a bucket 35, and is driven by a boom hydraulic cylinder 32, an arm hydraulic cylinder 34, and a bucket hydraulic cylinder 36.

Meanwhile, there is a conventional quick force bra 60 having a four-point support configuration, and this configuration will be described with reference to FIG. 15A. The arm 51 is connected to a bucket hydraulic cylinder 52 and a link 53 via a lever 54. The quick cover 60 is rotated by the tip of the arm 51 and the pin 50a, and the link 53 is rotated by the pin 50b. In addition to being freely connected, one end of a bracket 55a of the bucket 55 and a pin 50c are connected rotatably to the other end by a pin 50d. The pin 50c is adapted to engage with a groove provided in the quick force bra 60 as shown in the detail of a portion P in FIG. 15B, thereby facilitating the mounting of the bucket 55. ing. The turning radius of the bucket edge when this quick coupler 60 is not used is the turning radius R from the pin 50c to the bag edge. On the other hand, when the quick force bra 60 is used, the turning radius of the bucket edge is the turning radius R from the pin 50a of the arm 51 to the bucket edge (R. <R).

In addition, the present applicant has proposed a hydraulic shovel working machine using a three-point-supported quick force bra (see Japanese Patent Application No. 7-3117327). This configuration is such that the breaker chisel can be passed between the first bracket and the second bracket that are fixed to the bucket and are separated from each other.

By the way, as shown in FIG. 15B, the pin 50c that engages with the hook of the conventional four-point supporting quick force bra 60 hits the line, and a large surface pressure is generated, and the engaging part is Wears prematurely. For this reason, it is necessary to make the plate material of the quick force bra 60 thick, and as a result, there is a problem that the weight becomes heavy and the size becomes large due to the four-point support. When the four-point supporting quick force bra 60 shown in FIG. 15A is used, the bucket edge force _FE is the turning radius R when the quick force bra 60 is not used. And the ratio of the turning radius R when used, R. Since it decreases in proportion to R, it is not possible to obtain the same cutting edge force F _κ without using the quick force bra 60.

In addition, since the operating angle of the bucket blade becomes larger as the turning radius becomes larger, operating the work machine with a driving feeling without using the quick force bra 50 causes the lower surface of the boom 31 and the arm to operate. 33 The bucket blade collides with the back of 3 or the cab 24.

Also, if the mounting pin diameter is different when exchanging from the mounting bucket 55 to another work tool with one hydraulic excavator 20, if the boss of the bracket of the work tool is modified or additional work is performed. Is required, and replacement work becomes extremely difficult. In addition, in the case of a 4-point support quick force bra 60, it is necessary to remove the two pins 50c50d when exchanging the bucket 55 for the bracing force. In short, each pin 50c, 50d is deformed and damaged by repeated attachment and detachment. Also, when a three-point supporting quick force bra is used, there is a problem similar to that of the four-point supporting quick coupler 60 described above. Or repair such as changing the position of the mounting hole on the attachment side is required.

Disclosure of the invention

The present invention focuses on such a conventional problem, and reduces the surface pressure of an engaging portion between a pin and an engaging member that engages a work implement such as a bucket breaker to improve the weight and durability of the quick force bra. It is another object of the present invention to provide a hydraulic shovel working machine capable of easily and easily replacing other working tools having different pin diameters to be mounted.

According to a first aspect of the present invention, there is provided a working tool such as a boom, an arm, and a bucket which is sequentially connected from a vehicle body, an engaging link which is connected to one side of the working tool, and which is engaged with a working machine link. In a working machine of a hydraulic shovel having an engaging member connected to the other side of the work implement and engaged with an arm, a left and right pin fixed to the left and right brackets of the work implement, and a maximum diameter of the left and right pins A slit portion having a small width and the engaging members having fixing portions for fixing the left and right pins at both ends are provided.

According to this configuration, by inserting the slit portion of the engaging member into the distal end portion of the left and right pins and rotating the engaging member, the left and right pins engage with the fixed portion of the engaging member. And the arm can be reliably engaged. Since the engaging portion between the left and right pins and the fixing portion of the engaging member comes into contact with each other, the surface pressure is small, wear of the engaging member and the left and right pins is prevented, and the durability is improved. In addition, since the surface pressure can be reduced by the structure of the left and right pins and the engagement member, the contact width between the left and right pins and the engagement member can be reduced, and the weight of the engagement member can be reduced.

The second invention further supports the left and right pins on one side of the left and right brackets, The engaging member engages with the arm, one end is attached to the engaging member, and the other end has an elongated hole for engaging the other side of the left and right brackets and the working machine link with a third pin. And

According to this configuration, even if the distance between the mounting holes at the two power points of the arm and the working machine link provided on the left and right brackets is different, the working machine link is moved by the long hole provided on the engaging link. The work pins can be mounted by aligning the holes in the work link with the mounting holes in the left and right brackets and inserting the third pin. The work efficiency can be improved because it is easy to attach the work tools of each force with one hydraulic excavator without any repairs.

Since the engagement link is made of i steel plates, it is lightweight and can be easily attached by one person. In addition, since the engaging link has a two-point support structure, the turning point of the working tool does not change, and the same bucket edge force as when the engaging link is not used can be obtained. In the third invention, the left and right pins are fixed to the fixing portion of the engaging member by rotating the engaging link by approximately 90 °.

According to this configuration, when the engagement link is set to a substantially vertical state, the tip portions of the left and right pins and the slit portion of the engagement member are engaged, and from this state, the engagement link is rotated by approximately 90 °. The left and right pins engage with the fixed portion of the engaging member, and do not fall out of the slit portion. The engagement state can be reliably maintained only by rotating the engagement link.

In the fourth invention, the engagement member and the engagement link are fixed to each other by a fixing pin.

According to this configuration, the relative positional relationship between the slit portion of the engagement member and the left and right pins can always be kept constant, so that the work implement can be easily engaged.

A fifth invention provides a hydraulic device including a working tool such as a boom, an arm, and a bucket that is sequentially connected from a vehicle body, and an engaging link that is connected to both sides of the working tool and that is engaged with the working machine link and the arm. In the work machine of the shovel, a second pin fixed to one side of the left and right brackets of the work tool, a slit having a width smaller than the maximum diameter of the second pin, and the inserted second pin are fixed. The engaging link having a fixing portion. According to this configuration, the slit portion of the engagement link is inserted into the distal end portion of the second pin, and the second pin is engaged with the fixed portion of the engagement link by rotating the engagement link by approximately 90 °. Therefore, the working tool can be reliably engaged. In addition, since the engaging portion between the second pin and the fixing portion of the engaging link comes into contact with the surface, the surface pressure is small, and the engagement link and the second pin can be prevented from being worn, and the durability is improved. Since the surface pressure can be reduced by the structure of the second pin and the engagement link, the contact width between the second pin and the engagement link can be reduced, and the weight of the engagement link can be reduced.

A sixth invention provides a hydraulic device having a working tool such as a boom, an arm, and a baggage that is sequentially connected from a vehicle body, and an engaging link that is connected to both ends of the working tool and that is engaged with the working machine link and the arm. In a working machine of a shovel, a first connecting portion connected to the tip of the arm, a hook-shaped second connecting portion connected to one side of the left and right brackets of the work implement, and the other side of the left and right brackets and An engagement link having a third hole-shaped connecting portion that connects the distal end portion of the working machine link together; and an insertion link inserted into the distal end portion of the working machine link and the third connecting portion of the engaging link. And a third pin for attaching the work tool by inserting the pipe member and the mounting hole on the other side of the left and right brackets.

According to this configuration, the pipe member and the third pin do not rotate with respect to each other, so that they do not wear. In addition, since it is not necessary to disassemble the sliding part between the pipe member and the work equipment link when replacing the work tool, dust is not mixed and the wear life is extended.

Further, if one third pin of the engagement link is removed, the hook-shaped second connecting portion can be removed, so that the working tool can be easily replaced and the replacement time can be reduced.

And since the pipe member and the third pin do not slide, there is no need for grease lubrication between the inner peripheral cylindrical portion of the pipe member and the outer peripheral portion of the third pin, and there is no need to machine the grease hole. Give

According to a seventh aspect of the present invention, the pipe member is made of various pipe members having different inner diameters D, corresponding to the diameters of the mounting holes of various work tools, respectively. Various pins with different outer diameters that can be inserted according to the inner diameter of Become.

According to such a configuration, and the different tube member inner diameter D _3, if a third pin having different outer diameters with various prepared, standard bucket DOO, slope bucket Bok, replacement of the breaker and the gripping device of various work tool Mounting becomes possible. Accordingly, various work tool, or even different attachment hole of the implement by the manufacturer, by preparing a different tube member having an inner diameter D _3, can be easily replaced implement without repair machining.

According to an eighth aspect of the present invention, a cutout portion is provided at the left and right ends of the tube member, and a slit portion is provided at the engagement link for receiving and stopping the cutout portion.

According to this configuration, the slit portion of the engagement link and the cutout portion of the pipe member are slidably engaged with each other, and both are in planar contact. Therefore, the engaging link and the pipe member do not rotate relative to each other, and the contact surface is wide, so that the wear life is extended and the durability is improved.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view of a working machine of a hydraulic shovel according to a first embodiment of the present invention. FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

5A and 5B are explanatory views of the operation of the engagement link of the first embodiment.

FIG. 6A is a side view of a working machine of the hydraulic shovel of the second embodiment, and FIG. 6B is a cross-sectional view taken along a line C-C of FIG. 6A.

FIG. 7 is an operation explanatory view of the engagement link of the second embodiment.

FIG. 8 is a Z view of FIG. 7, and FIG. 9 is a sectional view taken along the line DD of FIG.

FIG. 10 is a partial side sectional view of a working machine of a hydraulic shovel according to a third embodiment.

FIG. 11 is a sectional view taken along line E--E of FIG.

FIG. 12 is a cross-sectional view taken along line FF of FIG.

FIG. 13 is a GG view of FIG. FIG. 14 is a side view of the excavator.

FIG. 15A is an explanatory view of a working machine using a conventional four-point supporting quick force bra, and FIG. 15B is a detailed view of a P portion of FIG. 15A. BEST MODE FOR CARRYING OUT THE INVENTION

A first embodiment of a working machine of a hydraulic shovel according to the present invention will be described in detail with reference to FIGS. Note that the components denoted by the same reference numerals as those in FIG. 14 have the same configuration, and thus description thereof will be omitted.

The arm 33 shown in FIG. 1 and the link 38 linked with the lever 37 operated by the bucket hydraulic cylinder 36 are connected to a bracket or the like via an engagement link 1 such as a bucket 35 (hereinafter referred to as a bucket). 35) are attached to the left and right brackets 35a and 35b. The engagement state between the arm 33 and the link 38 and the engagement link 1 will be described with reference to FIG. The left and right brackets 35 a 35 b are fixed parallel to the outer surface of the baguette 35. One end of the engagement link 1 and the engagement member 2 are integrally fixed by a fixing pin 2e. The center of the engaging member 2 is connected to the arm 33, and both ends of the engaging member 2 are engaged by left and right pins 3a and 3b. The left and right pins 3a, 3b are integrally fixed to the left and right brackets 35a, 35b by locking.

The other end of the engaging link 1 and the left and right end portions 38a, 38b of the link 38 of the working machine are connected by a tubular connecting member 38c. A third pin 39 is inserted into a hole where the other end of the engagement link 1 and the left and right end portions 38a, 38b are aligned. Third pin 3 9, left bracket 3 5 b to arresting the previous end of the right pin 3 a which is integrally fixed to the turn stop to _c right bracket Bok 3 5 a that is integrally fixed to As shown in FIG. 3, the portion has a shape having a straight portion having a parallel cross section and arc portions on both sides thereof. The diameter of the right pin 3a is set to be larger than the opening of the slit portion 2a of the engaging member 2. Therefore, the engaging member 2 cannot be disengaged from the right pin 3a, and is in the engaged state.

Similarly, the left pin fixed to the left bracket 35 As shown in FIG. 4, the distal end of 3b has a shape having a straight section having a parallel cross section and circular arc sections on both sides thereof. The diameter of the left pin 3b is set larger than the opening of the slit portion 2b of the engaging member 2. Therefore, the engaging member 2 cannot be disengaged from the left pin 3b, and is in the engaged state. In this manner, both ends of the engaging member 2 are engaged with the left and right pins 3a, 3 and are securely held.

The thickness T of the tip of the left and right pins 3a, 3b. , The maximum diameter T of the left and right pins 3 a, 3 b,, if slit isolation portion 2 a, 2 b opening ratio T ₃ of, these interrelationships T. <Τ ₃ , Τ,> Τ ₃

Next, the operation of the present embodiment will be described with reference to FIGS.

As shown in FIG. 5A, the long hole 1a of the engaging link 1 is in a state where the left and right end portions 38a, 38b of the link 38 of the working machine are connected via the tubular connecting member 38c. is there. When the engagement link 1 is set to a substantially vertical state, the two slit portions 2a and 2b of the engagement member 2 face downward, so that the two slit portions 2a are attached to the tips of the left and right pins 3a and 3b. , 2b can be inserted to engage both. When the bucket cylinder 36 is extended from this state, the work machine link 38 operates forward, and the engagement link 1 fixed integrally with the engagement member 2 also moves forward with the left and right pins 3a and 3b as the centers. To rotate.

Then, when the engaging link 1 is rotated by about 90 ° as shown in FIG. 5B, the connecting member 38 c movable in the long hole 1 a of the engaging link 1 and the left and right brackets 35 a, Align the mounting holes 40a and 40b of the 35b, insert the third pin 39, and stop the rotation. Also, when the engagement link 1 is rotated by approximately 90 °, both the slit portions 2a and 2b of the engagement member 2 are turned rightward, so that the left and right pins 3a and 3b and the engagement member 2 are securely connected. It is engaged with and does not come off.

In this way, the work tool 35 such as a baguette and the arm 33 can be reliably engaged. In addition, the engagement between the left and right pins 3a, 3b and the two fixing portions 2c, 2d of the engagement member 2 comes into contact with the surface as shown in FIGS. Can be prevented and durability is improved. The structure of the left and right pins 3a and 3b and the engagement member 2 makes it possible to reduce the surface pressure and reduce the contact width, so that the weight of the engagement member 2 can be reduced. Also, between the mounting holes 40a, 40b of the working machine link 38 provided on the left and right brackets 35a, 35b of the bucket 35 and the mounting holes 41a, 4lb of the arm 33. Even if the distances are different, the work implement link 38 is moved by the long hole 1a provided in the engagement link 1, and the tubular connecting member 38c of the work link 38 and the left and right brackets 35a , 35b are aligned with the mounting holes 40a, 4Ob, and the pin 39 can be inserted and mounted. For this reason, the work tools 35 such as buckets of each maker can be easily mounted with one hydraulic excavator without any repair or the like, and the work efficiency is improved.

In addition, in order to adjust the distance between the mounting holes 40a, 40b of the working machine link 38 and the mounting holes 41a, 41b of the arm 33, the length provided on the engaging link 1 was adjusted. In addition to the hole 1a, for example, a movable hook that can be extended and contracted by a spring or the like may be provided in the engagement link 1, and the work implement link 38 may be attached to the movable hook.

In addition, since the engagement link 1 is made of a single steel plate, it is lightweight, and can be easily attached by one person. Since the engagement link 1 has a two-point support structure, the pivot point of the bucket 35 does not change, and the same bucket edge force as when the engagement link 1 is not used can be obtained.

Further, the engaging member 2 and the engaging link 1 are fixed by a fixing pin 2e, and the relative positional relationship between the two slit portions 2a, 2b of the engaging member 2 and the left and right pins 3a, 3b is determined. Since it can be kept constant, the working tool 35 such as a bucket can be easily inserted and engaged.

Next, a second embodiment of a working machine for a hydraulic shovel according to the present invention will be described with reference to FIGS. 6A to 9. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In this embodiment, as shown in FIG. 6A, a three-point support engagement link 10 is used. The arm 33 supports the engagement link 10 with a first pin 33a. This first pin 33 a is a pivot point of the bucket 35. The left and right brackets 35a and 35b of the bucket 35 are provided with second pins 45 as shown in FIG. 6B. Lower the frame 33 to move the engagement link 10 downward as indicated by the arrow in FIG. Insert the slit 10c of the bracket 10b into the second pin 45 attached to the left and right brackets 35a, 35b. When the work implement link 38 is pushed to rotate the engagement link 10 by approximately 90 °, the second pin 45 engages with the fixed portion 10d of the engagement link 10. As a result, the second pin 45 does not come out of the slit section 0c, so that both can be reliably engaged.

As shown in FIG. 6A, a lever 37 operated by a bucket hydraulic cylinder 36 is attached to the arm 33. The left and right end portions 38a, 38b of the working machine link 38 connected to the lever 37 and the elongated hole 10a provided in the engagement link 10 are connected by the tubular connecting member 38c. Have been. With the engagement link 10 rotated approximately 90 °, align the mounting holes 40a, 40b of the left and right brackets 35a, 35b, and insert the third pin 39. , They are integrally fixed by the stopper.

As shown in FIGS. 8 and 9, the second pin 45 engaging with the hook portion 1 Ob has a shape having a linear portion having a parallel cross section and circular arc portions on both sides thereof.

Next, the operation of the present embodiment will be described.

Insert the slit 10c of the engagement link 10 into the parallel straight section of the second pin 45, then rotate the engagement link 10 forward approximately 90 ° to fix the hook 10b. The portion 10d and the arc portions on both sides of the second pin 45 are brought into contact with each other and engaged. As a result, the engagement link 10 does not detach from the second pin 45, and the bucket 35 can be securely engaged. Also, since the second pin 45 and the fixed portion 10d of the engagement link 10 are in contact with each other, the surface pressure is small, and the engagement link 10 and the second pin 45 can be prevented from being worn, and the durability is improved. Is improved. The structure of the second pin 45 and the engagement link 10 makes it possible to reduce the surface pressure and reduce the contact width, so that the weight of the engagement link 10 can be reduced. Further, similarly to the first embodiment, various working tools of each manufacturer can be easily mounted with one hydraulic excavator.

Next, a third embodiment of a working machine for a hydraulic shovel according to the present invention will be described with reference to FIGS. The same members as those in the second embodiment are given the same reference numerals, and description thereof is omitted. This embodiment also uses a three-point support engagement link 10. As shown in FIG. 10, an engagement link 10 is supported by a first pin 33 a at a tip of the arm 33, and forms a first connecting portion 40. The hook portion 10b of the engagement link 10 is engaged with the second pin 45 fixed to one end of the left and right brackets 35a and 35b. Make up. The locking slot 10 e of the long hole 10 a provided at the tip of the engagement link 10, the other ends of the left and right brackets 35 a, 35 b, and the work implement link 38 are both They are connected to form a third connecting portion 42.

Since the first connecting portion 40 and the second connecting portion 41 have the same configuration as the second embodiment, the description is omitted, and the third connecting portion 42 will be described.

In FIGS. 10 and 11, the distal end 38 a of the working machine link 38 and the detent slit 10 e provided on the engagement link 10 are positioned, and the pipe member 43 is inserted. And both are engaged. In addition, the pipe member 43 and the mounting holes at the other ends of the left and right brackets 35a and 35b are positioned, and the third pin 39 is inserted to stop the rotation.

At one end of the long hole 10 a of the engagement link 10, a round mosquito L 10 ί is provided as shown in FIG. 13, and the inside diameter D, is the outside diameter D _{2 of the} pipe member 43. A little larger (D,> D ₂ ) o

The tubular member 4 3, different were various prepared inner diameter D ₃ shown in FIG. 1 2, the diameter of the third pin 3 9 is can be mounted various bucket Bok 3 5 different. A bush 38b is interposed between the outer peripheral portion of the pipe member 43 and the inside of the distal end 38a of the working machine link 38. In addition, cutouts 43a and 43a are provided at both ends of the outer peripheral portion of the pipe member 43. These cutouts 43a, 43a are slidably engaged with detent slits 10e provided in the engagement link 10 as shown in FIG. Next, the operation of the present embodiment will be described.

Since the first connecting portion 40 and the second connecting portion 41 are the same as in the second embodiment, the description is omitted, and the operation of the third connecting portion 42 will be described.

First, the bush 38b is assembled into the tip 38a of the working machine link 38, and the pipe member 43 is inserted. In this state, insert the pipe member 4 3 through the round hole 10 f of the engagement link 10. And then move laterally. The notches 43a and 43a of the pipe member 43 are slidably engaged with the slits 10e of the engagement link 10 by the rolling procedure. Then, the pipe member 43 is aligned with the mounting holes at the other ends of the left and right brackets 35a and 35b, and the third pin 39 is inserted and fixed.

When replacing the left and right brackets 35 a and 35 b of the baguette 35 with another tool having a different pin-to-pin distance, the pipe member 43 is engaged with the second pin 45 by the engagement link 10. Sliding adjustment can be made with the slit portion 10e of the above, and the third pin 39 is inserted at a predetermined position, and can be replaced with another work tool.

According to the present embodiment, if various pipes having different inner diameters of the pipe members 43 are prepared, it is possible to replace and attach various working tools such as a standard bucket, a slope bucket, a breaker, and a gripping device. Become. This makes it possible to easily replace various working tools or working tools with different mounting hole diameters for each manufacturer without repairing. Further, the pipe member 43 and the third pin 39 do not rotate because they do not rotate with respect to each other. Since it is not necessary to disassemble the sliding part between the pipe member 43 and the work equipment link 38 when replacing the work tool, dust is not mixed and the wear life is extended.

The slit 10e of the engagement link 10 and the cutouts 43a, 43a of the pipe member 43 are slidably engaged with each other. Since the two are in planar contact, the engagement link 10 and the pipe member 43 do not rotate relative to each other, and the wear life is extended.

In addition, if one third pin 39 is removed, the hook 10b of the engaging link 10 can be detached from the second pin 45, making it easy to replace the baggage 35 with another work tool. (The conventional quick force bra removes two pins and replaces them with another tool.)

Furthermore, since the pipe member 43 and the third pin 39 do not slide, and there is no need to lubricate the two, there is no need to machine a grease hole in the third pin 39 (the conventional lubricating structure requires a lubricating hole). Grease holes are processed). INDUSTRIAL APPLICABILITY The present invention reduces the surface pressure of an engaging portion between a pin and an engaging member that engages a work implement such as a bucket breaker to improve the weight and durability of a quick force bra, It is useful as a working machine of a hydraulic shovel that can easily and easily be replaced with other working tools having different mounting hole diameters. The present invention is also applicable to construction machines and industrial machines other than hydraulic excavators.

Claims

The scope of the claims

1. Work implements (35), such as booms, arms and baguettes, which are sequentially connected from the vehicle body, and an engagement link (38) which is connected to one side of this work implement and engages the work implement link (38). 1) and an engaging member (2) that is connected to the other side of the work implement and engages with the arm (33).

Left and right pins (3a, 3b) fixed to the left and right brackets (35a, 35b) of the work implement (35), and slits (2a, 2b) having a width smaller than the maximum diameter of the left and right pins (3a, 3b). ) And the engaging members (2) having fixing portions (2c, 2d) at both ends for fixing the left and right pins (3a, 3b).

2. The engaging member (2) supported on one side of the left and right brackets (35a, 35b) by the left and right pins (3a, 3b) and engaged with the arm (33), The other end has an elongated hole (la) that engages the other side of the left and right brackets (35a, 35b) and the work equipment link (38) with a third pin (39). The hydraulic excavator working machine according to claim 1, further comprising a link (1).

3. The right and left pins (3a, 3b) are fixed to the fixing portion (2 2d) of the engaging member (2) by rotating the engaging link (1) by approximately 90 °. The hydraulic shovel working machine according to claim 2.

4. The hydraulic excavator working machine according to claim 2, wherein the engaging member (2) and the engaging link (1) are fixed to each other by a fixing pin (2e).

5. Work implements (35), such as booms, arms and buckets, which are sequentially connected from the vehicle body, and a worker engaged with both sides of the work implements and engaged with the work implement link (38) and the arm (33). In a working machine of a hydraulic shovel provided with a joint link (10), A second pin (45) fixed to one side of the left and right brackets (35a, 35b) of the work implement (35); a slit portion (10c) having a width smaller than the maximum diameter of the second pin; The working machine of a hydraulic shovel, comprising: the engaging link (10) having a fixing portion (10d) for fixing the second pin.

6. Work implements (35), such as booms, arms, and baguettes, which are connected sequentially from the vehicle body, and a worker that connects to both ends of the work implements and engages with the work implement link (38) and arm (33). In a working machine of a hydraulic shovel provided with a joint link (10),

A first connecting portion (40) connected to the tip of the arm (33); and a hook-shaped second connecting portion (41) connected to one side of the left and right brackets (35a, 35b) of the work implement (35). ), And the engagement link (10) having an elongated third connection portion (42) for connecting the other side of the left and right brackets and the tip portion (38a) of the working machine link (38) together. A pipe member (43) inserted into the distal end portion of the working machine link (38) and the third connecting portion of the engagement link (10) to engage with each other; and a pipe member and the left and right brackets other than the pipe member. And a third pin (39) for inserting the work tool into the mounting hole on the side of the hydraulic shovel.

7. The pipe member (43) is composed of various pipe members having different inner diameters corresponding to the diameters of the mounting holes of the various working tools, and the third pin (39) for mounting the working tool is configured of the above-described various types. 7. The working machine of a hydraulic shovel according to claim 6, wherein the working machine comprises a variety of pins each having a different outer diameter that can be inserted corresponding to the inner diameter of the pipe member.

8. Cutouts (43a, 43a) are provided at the left and right ends of the pipe member (43), and the engaging link (10) is provided with a slit (10e) for receiving and rotating the cutout. 8. The hydraulic excavator working machine according to claim 6, wherein the hydraulic excavator is provided.