JP5094759B2 - Work implement equipment - Google Patents

Description

  The present invention relates to a work tool device for a work machine such as a loader work machine or a backhoe, in which a work tool is attached to the tip side of a boom.

  2. Description of the Related Art Conventional work tool devices for work machines such as loader work machines and backhoes have a bucket (work tool) mounted on the tip side of the boom, and a work tool cylinder is connected between the boom and the work tool. There is a work tool that is operated by expansion and contraction of the cylinder for the thumb. A thumb is mounted on the tip of the boom facing the bucket, and the thumb cylinder is provided between the thumb and the boom. There is a configuration in which the thumb can be opened and closed with respect to the bucket, the gripping operation is performed between the bucket and the thumb, and an object can be gripped (for example, Patent Document 1).

  In addition, a work tool device of another work machine is provided with a pair of work members constituting a work tool that performs a gripping operation on the tip end side of the boom, and the pair of work members is formed by an expansion / contraction operation of one kind of opening / closing cylinder. There is one which is made to grasp and operate (for example, Patent Document 2).

JP 2007-92763 A JP 2000-34743 A

However, in the former conventional case, by removing the thumb, a digging operation and a carrying operation can be performed by the bucket, and a gripping operation can be performed by attaching the thumb. The cylinder control and the hydraulic circuit structure are complicated, the overall structure is complicated and the manufacturing cost is high.
In the latter conventional case, only one type of working tool cylinder is required, and the control of the cylinder and the configuration of its hydraulic circuit are simplified, but it is inconvenient because the operation of digging and carrying by the bucket cannot be performed.

  In view of the above problems, the present invention can perform a digging operation and a conveying operation by a bucket, can also perform a grasping operation, and only one type of cylinder for a work tool is required, and the control of the cylinder and the structure of its hydraulic circuit are simplified. The overall structure is simple and the manufacturing cost is low.

The technical means of the present invention for solving this technical problem is that a work tool is mounted on the tip side of the boom, a work tool cylinder is connected between the boom and the work tool, and the work tool cylinder is expanded and contracted. A work implement device of a work machine adapted to operate a tool,
The work tool includes a first work member and a second work member, a first link projects from the base side of the first work member, a second link projects from the base side of the second work member, The first link and the second link are swingably connected around the opening / closing axis so that the first work member and the second work member can grip each other, and the first work member and the second work member are closed. The first link and the second link are configured to be connected and fixed by a detachable connecting pin at a position spaced from the opening and closing shaft so that the bucket is fixed to each other in a state.
A support bracket is provided on the first work member, the support bracket is swingably connected to the tip of the boom around the boom support shaft, and the first work member swings around the boom support shaft by the expansion and contraction operation of the work tool cylinder. The working tool cylinder is coupled to the support bracket so that the second working member swings about the opening / closing axis relative to the first working member in conjunction with the swinging motion of the first working member about the boom support shaft. The distal end side of the second link and the boom are connected to each other by the third link so that the first working member and the second working member can be gripped by moving.

According to another technical means of the present invention, the opening / closing shaft connects the first link and the second link so as to be freely disengaged, and the connection between the first link and the second link by the opening / closing shaft is released. By removing the second work member, the second link, and the third link from the boom side, the first work member can swing around the boom support shaft by the expansion and contraction operation of the work tool cylinder and can be pushed. It is in the point which is comprised.
According to another technical means of the present invention, the support bracket is detachably attached to the first link so that the first working member and the first link can be detached from the boom and the working tool cylinder. In the point.

  According to the present invention, by connecting the first link and the second link with the connecting pin at a position separated from the opening and closing shaft, the first working member and the second working member are fixed to each other in a closed state, The digging operation and the carrying operation can be performed by the bucket, and the second working member is moved relative to the first working member in conjunction with the swinging operation of the first working member around the boom support shaft by removing the connecting pin. By swinging around the opening / closing shaft, the first working member and the second working member come to grip each other. Moreover, only one type of work tool cylinder is required, the cylinder control and hydraulic circuit are simplified, the overall structure is simple, and the manufacturing cost is reduced.

1 is an overall side view of a work machine showing an embodiment of the present invention. It is a top view of the boom and a work tool part. It is an enlarged plan view of the boom and the work tool part. It is a side view of the work tool part in the state which performs the same gripping operation. It is a side view of the work tool part of the state which carries out the digging and carrying operation. It is a side view of the work tool part in the state which performs the pushing operation. It is a side view of the 2nd working member part of the state removed from the boom. It is a side view of the boom front-end | tip part in the state which removed the work tool from the boom. It is a side view of the work tool part of the state removed from the boom. It is a side view of the work tool part of the state which the working members opened. It is a side view of the work tool part of the state which performs the holding | grip operation | movement which shows other embodiment. It is a side view of the work tool part of the state which the working members opened.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a loader working machine in which a front loader 3 is attached to the front portion of a tractor (traveling vehicle) 2.
The vehicle body 4 of the tractor 2 is mainly composed of a clutch housing connected to the rear of the engine and a transmission case connected to the rear of the clutch housing, and a pair of left and right front wheels 7 serving as steering wheels, and driving wheels. The left and right rear wheels 8 are supported so as to be able to travel.
The engine is housed in a front bonnet 5, and a front axle frame 6 projecting forward from the engine is attached and fixed to the front left and right side surfaces of the engine by bolts or the like. A front wheel 7 is supported via a front axle case or the like.

A driver's seat 10 is provided above the rear of the vehicle body 4, and a steering handle 11 is provided in front of the driver's seat 10.
The front loader 3 includes a frame 12, a boom 13, and a work tool (attachment) 14 constituting a bucket.
The frame 12 is provided on the front side of the vehicle body 4 so as to protrude outwardly in the left-right direction from the vehicle body 4, and is provided on the support table 15 so as to protrude upward from the support table 15. The main frame 17, a side frame 18 detachably attached to the main frame 17, and a pair of left and right sub-frames 19 disposed in the front-rear direction on the side of the vehicle body 4 are provided.

A pair of left and right booms 13 is provided, and each of the left and right booms 13 is pivotally connected to the upper portion of the side frame 18 by a pin at the base end side (rear end side), and is vertically moved around a support shaft 16 in the left-right direction. The left and right booms 13 are connected to each other by a connecting member 21 on the front side thereof.
In addition, a boom cylinder 20 made of a hydraulic cylinder is interposed between the middle part of each of the left and right booms 13 and the middle part of each of the left and right side frames 18. 13 can swing up and down.

2 to 5, a work tool 14 is mounted on the distal end side of the pair of left and right booms 13, and a pair of left and right work tool cylinders 25 are connected between the pair of left and right booms 13 and the work tool 14. The work tool 14 is configured to be operated by expansion and contraction of the working cylinder 25.
The work tool 14 includes a first work member 26 and a second work member 27. The first working member 26 includes a pair of left and right side wall bodies 28 and a rear wall body 29 provided between the pair of side wall bodies 28, and the rear wall body 29 has a square shape with a bottom wall portion 30 having a short front and rear width. A claw body 32 is integrally provided with the bent back wall portion 31 and protrudes forward from the bottom wall portion 30. The second working member 27 includes a pair of left and right side wall bodies 34 and a bottom wall body 35 provided between the pair of side wall bodies 34, and a rear claw body 36 projecting rearward from the bottom wall body 35 and a front projecting front body. A nail body 37 is provided.

  A first link 39 projects from the base side of the first work member 26, and a second link 40 projects from the base side of the second work member 27. The left and right widths of the work tool 14 (the first work member 26 and the second work member 27) are formed larger than the separation width of the pair of left and right booms 13, and the first links 39 are formed on both left and right sides of the first work member 26. A pair of left and right is disposed, and the second link 40 is disposed on each of the left and right sides of the second working member 27. On the left and right sides of the work tool 14, the pair of left and right second links 40 are arranged outside the pair of left and right first links 39 in parallel with the first links 39.

Of the pair of left and right second links 40 on the left and right sides of the second working member 27, the second links 40 on the inner side in the left-right direction are connected to each other by an inner connecting body 41 in the left-right direction. Of the pair of left and right second links 40 on the left and right sides of the second working member 27, the second links 40 on the outer side in the left-right direction are connected to the side wall body 34 of the second working member 27 by the outer connecting body 42. ing.
A pair of left and right first links 39 and a pair of left and right second links 40 on both the left and right sides of the work tool 14 are connected to each other around an opening / closing shaft 43 so as to be swingable. The open / close shaft 43 is removably inserted into a connecting boss portion 44 provided in the middle portion of the pair of left and right first links 39 and a connecting boss portion 45 provided in the middle portion of the pair of left and right second links 40. The first link 39 and the second link 40 are connected so as to be freely disengaged, and the opening / closing shaft 43 is removed from the connecting boss portions 44 and 45 so that the pair of left and right first links 39 and the pair of left and right second links 40 are connected. The connection can be released.

  A connecting boss 46 is provided at the tip of each pair of left and right first links 39 on the left and right sides of the work tool 14, and a connecting boss 47 is provided in the middle of each pair of left and right second links 40. When the first working member 26 and the second working member 27 are in a closed state with respect to the first working member 26 around the opening / closing shaft 43. The connecting boss 47 of the two links 40 is aligned with the connecting boss 46 of the first link 39 and the connecting boss 47 of the second link 40 is aligned with the connecting boss 46, 47. By being inserted, the pair of left and right first links 39 and the pair of left and right second links 40 are connected and fixed by connecting pins 49 that are detachable at positions spaced from the opening and closing shaft 43, thereby the first working member 26. And the second working member 27 Flip was being fixed to each other in a state, so as to constitute a bucket for the operation and carry operation dig in the first working member 26 and the second working member 27.

That is, when the first work member 26 and the second work member 27 are closed and fixed to each other, the side wall body 28 of the first work member 26 and the side wall body 34 of the second work member 27 form the side wall of the bucket. The bottom wall portion 30 and the claw body 32 of the rear wall body 29 of the first working member 26 and the bottom wall body 35 and the rear claw body 36 of the second working member 27 form a long bottom wall before and after the bucket. The back wall of the bucket is constituted by the back wall portion 31 of the rear wall body 29 of the first working member 26.
On both the left and right sides of the work tool 14, support brackets 51 are detachably provided on the first work member 26, and the pair of left and right support brackets 51 are connected to each other by a connecting rod 52 in the left-right direction. Each support bracket 51 has a pair of left and right bracket plates 53, and the pair of left and right bracket plates 53 are connected to each other by a groove forming member 60 and a mounting boss portion 62 described later.

By inserting the boom support shaft 57 into the support boss portion 55 of the support bracket 51 and the support boss portion 56 at the distal end of the boom 13, the pair of left and right support brackets 51 are respectively attached to the distal end portions of the pair of left and right booms 13. It is connected so that it can swing around. A pair of left and right work tool cylinders 25 are connected to a pair of left and right support brackets 51 (on the left and right sides of the work tool 14) via a connecting boss portion 58 so as to be swingable around a support shaft 54. The first working member 26 is configured to swing around the boom support shaft 57 by the expansion / contraction operation.
A groove forming member 60 having a U-shaped locking groove 59 is fixed to the upper end portion on the base end side of the support bracket 51, and an engagement shaft 61 is provided on the upper portion on the base side of the first link 39. By engaging the engagement shaft 61 with the groove 59, the upper part of the base side of the first link 39 is locked to the support bracket 51 so as to be swingable around the engagement shaft 61. A mounting boss 62 is provided in the lower part of the base end side of the support bracket 51, and a mounting boss part 63 is provided in the lower part of the base side of the first link 39, and the mounting pin 64 is inserted into and removed from these mounting boss parts 62, 63. By freely inserting, the lower part on the base end side of the support bracket 51 and the lower part on the base part side of the first link 39 are connected to each other by a mounting pin 64 that is detachable. The engaging bracket 61 is engaged with the engaging groove 59, and the lower part on the base end side of the support bracket 51 and the lower part on the base side of the first link 39 are connected by the mounting pin 64, so that the support bracket 51 is The first link 39 to the first work member 26 are detachably fixed. Accordingly, by removing the mounting pin 64 from the support bracket 51 and the first link 39 and removing the engagement shaft 61 from the locking groove 59, the first from the support bracket 51 to the boom 13 as shown in FIGS. The working member 26, the second working member 27, the first link 39, the second link 40, and a third link 66 described later can be removed.

On both the left and right sides of the work tool 14, the distal end side of the pair of left and right second links 40 and the boom 13 are connected to each other by a pair of left and right third links 66 so as to be freely disengaged. As the second working member 27 swings around the opening / closing shaft 43 relative to the first working member 26 in conjunction with the swinging motion of the first working member 26, the first working member 26 and the second working member 27 are gripped. It is configured.
That is, a pair of left and right third links 66 that connect the pair of left and right second links 40 and the boom 13 are provided on the left and right sides of the first work member 26 and the second work member 27, respectively. 66 is arranged on the outside of the pair of left and right second links 40 so as to be close to and parallel to each of the second links 40. A connection boss 67 is provided on one end of the third link 66, a connection boss 68 is provided on the tip of the second link 40, and a connection boss 67 of the third link 66 and a connection boss of the second link 40. By inserting the support shaft 69 into the portion 68, one end portion side of the third link 66 is connected to the tip end side of the second link 40 so as to be swingable around the support shaft 69. A connecting boss portion 71 is provided on the other end side of the third link 66, a connecting boss portion 72 is provided on the tip side of the boom 13 via a support piece 70, and the connecting boss portion 71 of the third link 66 and the boom 13 are connected. By inserting the connecting pin 73 into the connecting boss part 72, the other end of the third link 66 can be swung around the pin axis by the connecting pin 73 which can be inserted into and removed from the distal end side of the boom 13, and the connection can be released. It is connected. Then, when the other end side of the third link 66 is connected to the tip end side of the boom 13 by the connecting pin 73, the second work member is interlocked with the swinging motion around the boom support shaft 57 of the first work member 26. 27 is configured to swing around the opening / closing shaft 43 with respect to the first work member 26 so that the first work member 26 and the second work member 27 grip each other.

An attachment hole 75 corresponding to the connection boss is provided in the middle of the pair of left and right third links 66, and the connection pins are removed from the pair of left and right third links 66 and the boom 13 to connect the third link 66 and the boom 13. By releasing and swinging the pair of left and right third links 66 around the support shaft 69 with respect to the second link 40, the mounting hole 75 of the third link 66 is connected to the connecting boss 46 and the second link of the first link 39. 40, and a pair of left and right first links 3 can be obtained by inserting the connecting pin 49 into the mounting hole 75 and the connecting bosses 46 and 47 in this state.
9, the pair of left and right second links 40 and the pair of left and right third links 66 can be fixed together, and the first working member 26 and the second working member 27 are fixed to each other in a closed state. It has become.

  The opening / closing shaft 43 is extracted from the connection boss portions 44 and 45 to release the connection between the first link 39 and the second link 40, and the connection pin 73 is extracted from the pair of left and right third links 66 and the boom 13 to form the third link 66. And the boom 13 are released, the second working member 27, the second link 40, and the third link 66 can be easily detached from the boom 13, as shown in FIGS. Thus, the first work member 26 can swing around the boom support shaft 57 by the expansion and contraction operation of the pair of left and right work tool cylinders 25, and the first work member 26 removes snow accumulated on the road surface and the like. It is comprised so that pushing operation for can be performed.

Note that the pressing operation by the first work member 26 is performed, for example, as shown in FIG. 6 by a telescopic operation of the work tool cylinder 25 so that the bottom of the first work member 26 is positioned downward. The member 26 is swung around the boom support shaft 57 and the boom 13 is lowered so that the bottom portion (claw body 32, bottom wall portion 30) of the first working member 26 is brought into contact with the ground or the ground. This is done by moving the work machine 1 forward.
According to the above embodiment, when the work tool 14 grabs and moves a wood or metal material, as shown in FIGS. 4 and 10, the opening / closing shaft 43 is connected to the pair of left and right first links 39. 44 and the connecting boss portion 45 of the pair of left and right second links 40 to connect the pair of left and right first links 39 and the pair of left and right second links 40 so as to be swingable around the opening and closing shaft 43, By inserting the connecting pin 73 into the connecting boss part 71 of the three links 66 and the connecting boss part 72 of the boom 13, the other end side of the third link 66 can be swung around the pin axis to the tip side of the boom 13. In this state, the working tool cylinder 25 may be expanded and contracted.

  In this case, when the work tool cylinder 25 is contracted, the support bracket 51, the first link 39, and the first work member 26 swing around the boom support shaft 57 in the direction of the arrow a1, as shown in FIG. The second link 40 and the second work member 27 are swung in the direction of the arrow a2 around the opening / closing shaft 43 with respect to the first work member 26 in conjunction with the swinging motion of the first work member 26 around the boom support shaft 57. Then, the first working member 26 and the second working member 27 perform an operation of closing around the opening / closing shaft 43. When the work tool cylinder 25 is extended, the support bracket 51, the first link 39, and the first work member 26 swing around the boom support shaft 57 in the direction of the arrow b1, as shown in FIG. The second link 40 and the second work member 27 are swung in the direction of the arrow b2 around the opening / closing shaft 43 with respect to the first work member 26 in conjunction with the swinging motion of the first work member 26 around the boom support shaft 57. Thus, the first working member 26 and the second working member 27 open around the opening / closing shaft 43.

Therefore, when the working tool cylinder 25 is expanded and contracted, the first working member 26 and the second working member 27 open and close around the opening / closing shaft 43, and the gripping operation is repeated. Accordingly, the work tool 14 can be used to grab and move wood, metal materials, and the like. In addition, when the gripping work such as gripping and moving wood or the like with the work tool 14 is performed, the boom 13 is set in a floating state.
Further, when digging or carrying soil or the like with the work tool 14, as shown in FIG. 5, the connection pin 73 is removed from the pair of left and right third links 66 and the boom 13 to connect the third link 66 and the boom 13. Is released, and the pair of left and right third links 66 are swung around the support shaft 69 with respect to the second link 40, so that the mounting hole 75 of the third link 66 is connected to the connecting boss 46 and the second link 39 of the first link 39. A pair of left and right first links 39, a pair of left and right second links 40, and a pair of left and right first pairs are inserted by inserting the connecting pins 49 into the mounting holes 73 and the connecting bosses 46 and 47 so as to match the connecting boss 47 of the link 40. The three links 66 are fixed so as to be integrated, and in this state, the work tool cylinder 25 may be expanded and contracted.

In this case, when the work tool cylinder 25 is contracted, the support bracket 51, the first link 39, the second link 40, and the third link 66 with the first work member 26 and the second work member 27 closed. At the same time, it swings around the boom spindle 57 in the direction of arrow a1. Further, when the work tool cylinder 25 is extended, together with the support bracket 51, the first link 39, the second link 40, and the third link 66 in a state where the first work member 26 and the second work member 27 are closed. It swings around the boom spindle 57 in the direction of arrow b1. Then, by fixing the first working member 26 and the second working member 27 in a closed state, the side wall of the bucket is formed by the side wall body 28 of the first working member 26 and the side wall body 28 of the second working member 27. The bottom wall portion 30 and the claw body 32 of the rear wall body 29 of the first working member 26 and the bottom wall body 35 and the rear claw body 36 of the second working member 27 form a long bottom wall before and after the bucket. Thus, the back wall portion 31 of the rear wall body 29 of the first work member 26 can be used to form the back wall of the bucket, and the work tool 14 can function as a bucket.

  Further, when a push operation such as removing snow accumulated on the road surface or the like is performed with the work tool 14, as shown in FIGS. 6 and 7, the opening / closing shaft 43 is extracted from the connecting boss portions 44 and 45 and the first link 39. And the second link 40 are released, the connecting pin 73 is removed from the pair of left and right third links 66 and the boom 13, and the connection between the third link 66 and the boom 13 is released, as shown in FIGS. Thus, the second work member 27, the second link 40, and the third link 66 may be removed from the boom 13 side. Then, the work tool cylinder 25 is expanded and contracted, and the push operation by the first work member 26 is performed such that the bottom of the first work member 26 is positioned downward as shown by a chain line in FIG. The first working member 26 is swung around the boom support shaft 57 by the expansion and contraction operation of the tool cylinder 25, and the boom 13 is lowered to bring the bottom of the first working member 26 into contact with the ground or the ground. This is done by advancing the work implement. Accordingly, the first working member 26 is integrally provided with the bottom wall portion 30 having a short front-rear width and the back wall portion 31 bent in a U-shape, and the nail body 32 protruding forward is provided on the bottom wall portion 30. In this way, the work for removing snow can be performed well.

  11 and 13 show another embodiment, in which the second link 40 is formed in an elongated shape, the third link 66 is formed in an elongated shape bent in a dogleg shape, and a mounting hole 75 is formed in the middle portion of the third link 66. A mounting boss 77 having the above is provided. In other respects, the configuration is the same as that of the above-described embodiment. Similarly to the above-described embodiment, the opening / closing shaft 43 is connected to the connecting boss portion 44 of the pair of left and right first links 39 and the pair of left and right second links 40. The pair of left and right first links 39 and the pair of left and right second links 40 are swingably connected around the opening / closing shaft 43, and the connection boss 71 of the third link 66 is connected to the connection boss portion 45 of the third link 66. When the working tool cylinder 25 is expanded and contracted by inserting the connecting pin 73 into the connecting boss portion 72 of the boom 13, the first working member 26 and the second working member 27 open and close around the opening / closing shaft 43, The work tool 14 can be used to grab and move wood or metal materials.

Also, the connecting pin 73 is removed from the pair of left and right third links 66 and the boom 13 to release the connection between the third link 66 and the boom 13, and the connecting pin 73 is inserted into the mounting hole 75 and the connecting bosses 46 and 47. Thus, by fixing the pair of left and right first links 39, the pair of left and right second links 40, and the pair of left and right third links 66 so as to be integrated, the work tool 14 can function as a bucket.
Further, by removing the second working member 27, the second link 40, and the third link 66 from the boom 13 side, it is possible to satisfactorily perform a work of pushing the first working member 26 and removing snow.

DESCRIPTION OF SYMBOLS 1 Loader working machine 3 Front loader 13 Boom 14 Working tool 25 Working tool cylinder 26 First working member 27 Second working member 39 First link 40 Second link 43 Opening and closing shaft 51 Support bracket 57 Boom shaft 66 Third link

Claims (3)

A work tool (14) is mounted on the tip side of the boom (13), a work tool cylinder (25) is connected between the boom (13) and the work tool (14), and the work tool cylinder (25) is connected. A work implement device for a work machine configured to operate the work implement (14) by expansion and contraction,
The work tool (14) includes a first work member (26) and a second work member (27), and a first link (39) projects from the base side of the first work member (26), and the second work member (26). A second link (40) protrudes from the base side of the work member (27), and the first link (39) is operated so as to be gripped by the first work member (26) and the second work member (27). And the second link (40) are swingably connected around the opening and closing shaft (43), and the first working member (26) and the second working member (27) are fixed to each other in a closed state, and the bucket is fixed. As configured, the first link (39) and the second link (40) can be connected and fixed by a connecting pin (49) that is detachable at a position spaced from the opening and closing shaft (43),
The first work member (26) is provided with a support bracket (51), and the support bracket (51) is connected to the tip of the boom (13) so as to be swingable about the boom support shaft (57). The work tool cylinder (25) is connected to the support bracket (51) so that the first work member (26) swings around the boom spindle (57) by the expansion and contraction operation of (25), and the first work member. The second work member (27) swings about the opening / closing shaft (43) with respect to the first work member (26) in conjunction with the swing motion of the boom support shaft (57) of (26). The third link (66) connects the tip end side of the second link (40) and the boom (13) so that the first work member (26) and the second work member (27) can grip each other. A work implement device for a work machine, wherein   The opening / closing shaft (43) connects the first link (39) and the second link (40) so as to be freely disengaged, and the first link (39) and the second link (40) by the opening / closing shaft (43). And the second work member (27), the second link (40), and the third link (66) are removed from the boom (13) side so that the first work member (26) 2. The work implement device for a working machine according to claim 1, wherein the work implement device is configured to be swingable around a boom support shaft (57) by a telescopic operation of the implement cylinder (25) and to be capable of pushing.   The support bracket (51) is attached to and detached from the first link (39) so that the first working member (26) and the first link (39) can be attached and detached from the boom (13) and the work tool cylinder (25). The work implement device for a working machine according to claim 1 or 2, wherein the work implement device is freely attached.

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