JPH1128373A - Bucket built in crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy to adjust between a movable plate and a bucket lower frame plate by supporting the movable plate on the opposite to the bucket lower frame plate in a manner the movable plate can freely swing, forming insertion hole at an eccentric position in a back side of the movable plate, and fixing a bearing material at any rotatable position in relation to both side frame plates of a bucket. SOLUTION: A bucket 1 of such a hydraulic shovel which is to be mounted on a working carrier comprises a pair of side frame plates 2 and lower frame plate 3 and a movable plate 4 is set on the opposite to the lower frame plate 3 in a manner the movable plate 4 can freely swing in the inside of a bucket frame 40. Crushing plates 26, 26' are installed on the mutually opposed faces of the lower frame plate 3 and the movable plate 4, respectively. The movable plate 4 is journalled as to freely rotate by a rotation axis 7 and a bearing material 8 behind the both side frame plates 2. The bearing material 8 is so formed as to have an insertion hole at a position O eccentric from the center P of a trunk part of the bearing by the distance (e) and the bearing material 8 is fixed at any rotation position in relation to both side frame plates 2, so that the gap between the movable plate 4 and the rear end of the lower frame plate 3 can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket mounted on a work cart such as a hydraulic shovel, and more particularly to a bucket having a built-in reciprocating crusher for crushing a scooped crushed object and opening the bucket from a rear opening. The present invention relates to a bucket capable of discharging finely divided material.

[0002]

2. Description of the Related Art Concrete waste generated from the dismantling of building structures is crushed by a breaker or crusher and then finely crushed by a fine crusher such as a roll crusher. In addition to dumping, it is used as recycled aggregate for roadbed materials and backfill ballast in pipe laying work. On the other hand, a small amount of concrete waste generated at small-scale demolition sites such as private houses and shops is uneconomical if transported to a specialized treatment plant and crushed. There are many.

In the case of processing at a work site, a bucket with a built-in crusher has been proposed as a device for scooping and crushing concrete waste scattered on the site, and the bucket is attached to the tip of an arm of a work cart such as a hydraulic shovel. use. Examples of this type of bucket include, for example, Japanese Patent Publication No. 59-47098 and Japanese Utility Model Publication No.
No. 0-42124 and the like.

[0004] If a bucket with a built-in crushing machine has a function of crushing the aggregate into various sizes according to the use of the aggregate after the crushing, the use as a general-purpose machine is widened and the utility value is increased. Is even higher. The reason is that when backfilling concrete waste to the site, it is necessary to crush it into fine particles so that weathering is promoted without hindering the use of the former site. This is because it is necessary to change the granularity depending on the purpose of use when reusing the same.

[0005] For this reason, even in a conventional bucket with a built-in crusher, various adjustment plates are selected between the rear end of the bucket lower frame plate and the rear end of the movable plate, as disclosed in Utility Model Registration No. 3032387. The particle size is controlled by insertion and fixation. Since these adjust plates have different thicknesses, the gap on the discharge side of the crushed material can be adjusted, and thereby the particle size of the finely divided material discharged from the opening behind the bucket can be controlled.

[0006]

In the above-mentioned bucket,
It is necessary to prepare various types of adjust plates having different thicknesses and replace the adjust plates each time according to the required particle size of the material to be crushed. Therefore, the above-mentioned bucket is uneconomical because it requires a lot of time and labor to adjust and replace the adjustment plate in addition to the preparation of accessory parts such as bolts and adjustment plates.

[0007] Furthermore, due to breakage, bending, abrasion or consolidation of the adjusting plate mounting bolts, it may be difficult to replace the adjusting plate only after disassembling the built-in crusher and taking out the movable plate. In the above bucket, insert the adjustment plate into the crush plate
Due to the fixation, there is also a problem that a step is generated by protruding from the plate plane by the thickness of the adjustment plate, thereby obstructing the flow of the object to be crushed downward and easily causing clogging.

The present invention has been proposed in order to improve the above-mentioned problems with respect to the conventional bucket with a built-in crusher, and without disassembling the built-in crusher, a gap between the movable plate and the lower frame plate of the bucket. It is an object of the present invention to provide a bucket with a built-in crusher that can easily adjust the size of the crusher. Another object of the present invention is to provide a bucket with a built-in crusher capable of moving a movable plate close to a bucket lower frame plate to crush the material to be crushed and smoothly discharging the obtained finely divided material from a rear opening. . Another object of the present invention is to provide a bucket with a built-in crusher for improving the durability of a crush plate installed on a movable plate and a bucket lower frame plate.

[0009]

In order to achieve the above-mentioned object, a bucket 1 according to the present invention is, as shown in FIGS. 1 and 2, a four-frame plate having a rectangular arrangement in which front and rear surfaces are open and communicate with each other. A pair of bracket portions 10, which are configured and fixed to the four frame plates,
It is mounted on a work vehicle such as a hydraulic excavator via the cable 10.
In the present invention, the four frame plates are the two side frame plates 2 and 2 and the lower frame plate 3
And an upper frame plate (for example, FIG. 17), and a structure in which the upper frame plate is replaced with another member by arbitrarily setting these shapes and spatial arrangements is also included in the four frame plates.

In the bucket 1, the flat movable plate 4 faces the bucket lower frame plate 3 in the bucket frame 40,
A bearing member 8 for supporting the rotating shaft 7 behind the movable plate is attached to the rear of the frame plates 2 and 2 on both sides of the bucket. As shown in FIGS. 3 and 8, the insertion hole 33 of the rotating shaft 7 is formed on the inner end face of the bearing member 8.
Is formed at an eccentric position, and both bearing members 8, 8 are fixed to the bucket side frame plates 2, 2 at an arbitrary rotation position.

As this fixing means, as shown in FIG. 8, a plurality of through bolt holes 3 are formed in a flange portion 34 of the bearing member 8.
5 are provided at equal intervals in the circumferential direction along a circle concentric with the center of the bearing body 32, while a plurality of screw bolts corresponding to the through holes are formed around the bearing material receiving hole 39 of the bucket side frame plate 2. Preferably, holes are formed and each bolt 36 is tightened through any set of through holes 35 and screw holes. As another fixing means,
As shown in FIG. 9, the flange portion of the bearing material is formed into a deformed plane such as an octagonal plane, and a cover 46 provided with a recess 47 of the deformed plane fitted with the flange is bolted to the bucket side frame plate 2. Alternatively, it is also possible to employ another fixing means.

In the bucket 1, the bucket lower frame plate 3
And crushing plates 26,
26 'is attached, one end of the hydraulic cylinder 9 is connected to the back of the movable plate 4, and the movable plate is rotated, so that the crushed object 50 (FIG. 4) is moved to the lower frame plate 3 and the movable plate 4. , The cylinder 9 expands and contracts to move the movable plate 4 close to the lower frame plate 3 to crush it, and discharge the granulated material 51 from the rear opening. As illustrated in FIG. 1 and FIG.
6, 26 'have a bar-shaped wear-resistant member 2 on the surface thereof.
It is preferable that a plurality of 7, 27's are arranged and fixed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a bucket 1 according to the present invention comprises a pair of side frame plates 2 and 2 forming a four frame plate, and a lower frame plate integrated with both side frame plates. 3 and the flat movable plate 4 faces the bucket lower frame plate 3 in the bucket frame 40. A plurality of excavating teeth 20 are detachably attached to the front edge of the lower frame plate 3.

The crushing plates 26 and 26 ′ having different plane dimensions are respectively attached to the opposing surfaces of the bucket lower frame plate 3 and the movable plate 4, and the vertical and horizontal dimensions and the mounting interval of the crushing plates may be appropriately set. Bar-shaped wear-resistant members 27, 27 'are fixed to the crushing plates 26, 26' at substantially equal intervals over substantially the entire surface (FIGS. 1 and 6). If the crushing plates 26 and 26 'are densely provided near the front end near the front opening 5 for a relatively large crushed object, the solid large crushed object directly contacts the surfaces of the movable plate 4 and the lower frame plate 3. The frequency of the replacement is reduced, the durability of the lower frame plate 3 and the movable plate 4 is improved, and the frequency of repair and replacement is reduced, which is economical.

The rod-shaped wear-resistant members 27 and 27 ′ are rigid in a rectangular cross section, and are disposed at substantially equal intervals on substantially the entire surface of each crush plate, as shown in FIGS. What is necessary is just to fix by appropriate means, such as wearing. The rod-shaped member may be not only rectangular in cross section but also substantially circular. Instead of the rod-shaped member, it may be directly welded on a crushing plate in a rod shape. The mounting interval of the wear-resistant member may be appropriately determined according to the properties of the object to be crushed.

The flat movable plate 4 is rotatably pivotally mounted on the rotating shaft 7 and the bearing member 8 behind the frame plates 2 and 2 on both sides, and is arranged upward from the rear to the front. The inside of the bucket frame 40 having the openings 5 and 6 communicating in the front-rear direction is configured. As illustrated in FIG. 5, a plurality of bosses 31 are integrally fixed to the rear end of the movable plate 4, and a center hole 38 that penetrates each boss horizontally in a straight line is formed. The movable plate 4 can be rotatably mounted by fitting the rotating shaft 7 into each center hole 38 and supporting both ends of the rotating shaft with the side frame plates 2 and 2 via the bearing members 8.

As shown in FIG. 8, the bearing member 8 is located at a position O eccentric from the center P of the bearing body 32 by an appropriate distance e.
And an insertion hole 33 for rotatably supporting the shaft end of the rotating shaft 7.
And a flange portion 34 is formed at the outer end thereof. A plurality of bolt holes 35 are formed in the flange 34 at equal intervals in the circumferential direction along a circle concentric with the center P of the bearing body 32. On the other hand, a bearing material receiving hole 39 is provided in the side frame plate 2 for bolting the bearing material 8, and a plurality of screw holes having the same diameter as the bolt holes 35 are formed in the periphery thereof so as to correspond to the bolt holes. I do.

As another mounting form of the bearing material, the outer end surface of the bearing body 32 may be contacted with the inner surface of the bucket side frame plate 2 and bolted without providing the bearing material receiving hole 39. A plurality of screw holes are formed in the outer end surface of the bearing material body 32 along a circle concentric with the center P, and bolt holes corresponding to the screw holes are formed in the bucket side frame plate 2. The movable plate 4 is inserted between the bucket side frame plates 2 and 2 with both bearing members mounted on both ends of the rotating shaft 7, and the bearing material is attached to the side frame plate 2 by adjusting the rotational phase of both bearing members. Bolt.
In this case, a screw hole is formed at the center of the outer end face of the bearing material, and a through hole is formed at the support center of the bucket side frame plate,
When a support bolt is inserted from the through hole and screwed into the screw hole, when the mounting bolt 36 is removed, the rotation of the bearing member about the support bolt can be easily adjusted.

On the other hand, one end of the hydraulic cylinder 9 is rotatably connected to the upper portion behind the movable plate 4 by a pin 29, and the other end of the cylinder is connected to a bracket portion 10 extending rearward in the bucket frame 40 by a pin. At 30 it is connected rotatably. Due to the expansion and contraction of the hydraulic cylinder 9, the movable plate 4 rotates to move toward and away from the bucket lower frame plate 3. As shown in FIG. 1, the hydraulic cylinder 9 is attached by connecting the knuckle portion 28 of the piston rod to the connecting member 24 on the rear surface of the movable plate 4.
Alternatively, the cylinder may be inverted and the clevis portion at the rear end of the cylinder may be axially mounted on the connecting member 24. This cylinder is not limited to the clevis type, but may be a trunnion type in which a trunnion shaft is projected from the cylinder body, and the trunnion shaft may be supported by a trunnion bearing material attached to the back of the bucket side frame plate or the bracket portion. .

The function of the bucket 1 built in the crushing machine will be described. The arm 12 and the bucket link 13 of the hydraulic shovel are operated to excavate the crushed material 50 such as concrete lump and rubble scattered at the demolition site of the building. And scoop it into bucket 1. In the state of FIG.
The movable plate 4 is moved toward and away from the lower frame plate 3 by the expansion and contraction operation of the movable frame 4.
Crush the object to be crushed between the
Is crushed into fine particles and discharged from the rear opening 6.

Regarding the movable plate 4, the position farthest from the lower frame plate 3 is indicated by a solid line in FIG. 1, and the position closest to the movable plate 4 is indicated by a two-dot chain line in FIG. 1 and a solid line in FIG. In FIG. 1, when the bearing member 8 is mounted by rotating it half a turn, the eccentric distance e of the rotation axis center O (O ′ in FIG. 3) with respect to the center point P of the bearing member shifts to the lower frame plate side, and the movable plate 4 O '(O in Fig. 3)
, The bucket rear opening 6
Is narrowed by a distance 2e from the initial gap. The approach amount of the movable plate 4 to the lower frame plate 3 is the distance e {1-cos (α)} when the rotation angle of mounting the bearing member 8 is α, and is the distance e when the rotation angle is 90 °. The minimum adjustment interval of the rotation angle α is determined by the numbers of the mounting bolts 36 and the holes 35. Since the amount of approach of the movable plate 4 (gap of the rear opening 6) can be appropriately adjusted, the particle size of the finely divided material 51 to be discharged can be controlled according to the gap.

[0022]

Next, the present invention will be described based on examples, but the present invention is not limited to the examples. As shown in FIGS. 1 and 2, the bucket 1 according to the present invention is formed of a rectangular four-frame plate whose front and rear surfaces are opened and communicated with each other. Face the frame plate 3. That is, the bucket 1 has a pair of parallel side frame plates 2 and 2 and a lower frame plate 3 integral with both side frame plates. By being attached to the shafts 2 and 2, the inside 40 of the bucket frame communicating with the front and rear openings 5 and 6 gradually decreases in width from the front to the rear.

As shown in FIGS. 5 to 7, the movable plate 4 facing the lower frame plate 3 includes a partition plate 21 having a substantially rectangular flat surface, and a plurality of movable plates 4 extending in the front-rear direction on the back surface of the partition plate and fixed in parallel. And two reinforcing ribs 22. As shown in FIGS. 1 and 3, the plurality of bosses 31 project obliquely rearward of the partition plate 21 and are integrally fixed to the rear end of the rib 22. A central through hole 38 is provided. The movable plate 4 has the through hole 38 of the boss portion 31 fitted with the rotating shaft 7, and both ends of the rotating shaft are rotatably supported by bearings 8, 8.

In the movable plate 4, a crush plate 26 ′
Are attached over almost the entire width of the partition plate surface. A square rod-shaped wear-resistant member 27 'is fixed to almost every surface of each crushing plate 26', and a plurality of wear-resistant members are arranged at substantially equal intervals and extend in the front-rear direction. On the other hand, the shielding plate 23 in front of the movable plate extends upward from the front end edge of the partition plate 21 and curves along an arc centered on the through hole 38 of the boss portion 31 to be in contact with the lower end edge of the partition plate 16 in front of the bucket. Being always adjacent prevents earth and sand from entering the vicinity of the hydraulic cylinder 9.

A bearing member 8 for supporting the rotating shaft 7 of the movable plate 4
Are located behind the frame plates 2, 2 on both sides of the bucket. As shown in FIG. 8, a bottomed insertion hole 33 into which the shaft end of the rotating shaft 7 can be inserted at a position O eccentric by an appropriate distance e from the center P of the bearing body 32, as shown in FIG. At the same time, a flange portion 34 is formed at the outer end. A plurality of bolt holes 35 are formed in the flange portion 34 at equal intervals in the circumferential direction along a circle concentric with the center P. On the other hand, the side frame plate 2 for bolting the bearing material 8 is provided with a circular bearing material receiving hole 39, and a plurality of screw holes having the same diameter as the bolt holes 35 in the periphery thereof correspond to the bolt holes. Formed.

The movable plate 4 has a central hole 38 of each boss 31.
The rotary shaft 7 is inserted between the side frame plates 2 and 2. After the rotating shaft 7 is aligned with the bearing material receiving hole 39 of each side frame plate 2, the bearing material 8 is moved from the outer side of the side frame plate to the receiving hole 3.
9 and the insertion hole 33 is fitted to the end of the rotating shaft 7. Next, the rotational phases of both bearing members 8, 8 are adjusted to each other, and a mounting bolt 36 is inserted into each bolt hole 35 and fastened.

At the front end of the bucket lower frame plate 3, a plurality of point teeth serving as excavating teeth 20 are detachably attached at predetermined intervals. In the lower frame plate 3, grid-like reinforcing ribs 18, 19 are formed vertically and horizontally on the outside, and a plurality of crushing plates 26 are attached inside the lower frame plate 3 over substantially the entire width. Like the movable plate 4, each crushing plate 2
A square bar-shaped wear-resisting member 27 is fixed to almost the entire surface of 6, and a plurality of wear-resisting members are arranged at substantially equal intervals and extend in the front-rear direction.

As shown in FIGS. 1 and 3, on the rear surface of the movable plate 4, a cylinder connecting member 24 having a pin hole provided slightly forward of the rear surface is fixed. A knuckle portion 28 at the tip of the piston rod of the hydraulic cylinder 9 is rotatably connected to the connecting member 24 by a pin 29, and a clevis portion at the rear end of the cylinder is rotatably connected to the bracket portion 10 by a pin 30. The hydraulic cylinder 9 is stored obliquely in a space formed by the bucket side frame plates 2 and 2 and the inclined partition plate 17. When the piston rod of the hydraulic cylinder 9 expands and contracts, the movable plate 4
Rotates around the rotation shaft 7 and approaches the bucket lower frame plate 3.
Departure operation.

With respect to the hydraulic cylinder 9, a hydraulic connection 15, near the boundary between the bracket portion 10 and the side frame plate 2,
The hydraulic connection 15 is connected to a hydraulic cylinder 9 by connecting a hose (not shown) of a reciprocating hydraulic piping system attached along the arm 12. Although not shown, hydraulic oil discharged from the hydraulic pump of the hydraulic shovel is supplied to the hydraulic cylinder 9 via an operation valve and a piping system, and the rotation of the movable plate 4 can be operated from the operation room of the hydraulic shovel. The valve unit 37 disposed on the side wall of the hydraulic cylinder 9 is a control valve mechanism for automatically controlling the reciprocating motion of the piston of the hydraulic cylinder 9. It has a built-in mechanism that alternately switches oil between the piston rod side and the cylinder head side.

In front of the movable plate 4, a partition plate 16 having a substantially U-shaped cross section is disposed, and both side edges of the partition plate are connected to the side frame plates 2 and 2 (see FIG. 1). . Partition plate 1
6, the inside of the bucket frame 40 expands toward the front opening 5, and the crushed material scooped and taken into the bucket frame 40 is moved by the movable plate 7.
At the front of the hydraulic cylinder 9 while preventing the crushed object from entering the vicinity of the hydraulic cylinder 9.

As shown in FIG. 2, both side frame plates 2 and 2
The upper brackets are bent inward from each other, and are integrated with the parallel bracket portions 10, 10 having a gap corresponding to the tip width of the arm 12 of the excavator. Bracket part 1
Pin holes 11, 11 are formed in 0, 10, and the tip end of the arm 12 of the excavator and the bucket link 13
And connect with a pin. Thus, the bucket 1 can be freely moved up and down and rotated along the vertical plane by operating the bucket cylinder 14, the arm 12, and the boom (not shown) of the excavator.

Next, the function of the bucket 1 built in the crusher will be described. First, the excavator arm 12 and the bucket link 13 are operated, and the bucket 1
The crushed material 50 such as concrete waste and rubble piled up on the ground or scattered at the site is scooped. The bucket 1 that has scooped the crushed object 50 is set in the posture shown in FIG.

In the cab of the excavator, the operation valve is driven by a pedal or a lever, and the high-pressure oil is transmitted from a hydraulic pump built in the excavator via a hydraulic pipe on the arm 12 and an automatic control valve mechanism 37 in a bucket. Is supplied to the hydraulic cylinder 9. By the supply of the high-pressure oil, the movable plate 4 repeats the reciprocating operation of approaching and separating from the lower frame plate 3 with the rotation shaft 7 as a fulcrum. By this reciprocating operation, the crushed object 50 stored in the bucket frame 40 is pinched between the lower frame plate 3 and the movable plate 4 and gradually crushed while gradually moving downward by its own weight. And the lower opening 6 of the bucket
Discharged from Along with this, the remaining crushed material 50 staying near the partition plate 16 gradually descends and is crushed sequentially. The maximum particle size of the discharged finely divided material 51 is determined by the rear end gap between the movable plate 4 and the lower frame plate 3.

When all the objects to be crushed scooped into the bucket 1 are crushed, the operation valve in the cab is returned to the original position, and the operation of the movable plate 4 is stopped. When the object to be crushed is scooped up again in the bucket 1, the above operation is repeated to perform the crushing process. In this crushing operation, the front portions of the movable plate 4 and the lower frame plate 3 crush relatively large chunks and receive a large impact force. Therefore, crush plates 26 and 26 'are provided on the surfaces thereof. Bar-shaped wear-resistant member 2 provided on the surface of crushing plates 26, 26 '
7, 27 'is hard, which prevents wear and damage of the movable plate 4 and the lower frame plate 3 and also prevents early wear of the crushing plate itself.
Lower smoothly along the direction of 7, 27 'streaks.

Regarding the method of adjusting the particle size of the discharged fine granules 51, the rotating shaft 7 of the movable plate 4 is
Is rotatably supported by an insertion hole 33 centered on a position O at an eccentric distance e. The flange portion 34 of the bearing member 8 includes
A plurality of bolt holes 35 are arranged at regular intervals in the circumferential direction symmetrically with respect to an extension line connecting the two points PO along a circle concentric with the center P, while the side frame plate 2 has a bearing material receiving hole. A plurality of screw holes having the same diameter as the bolt holes 35 are formed around the periphery of the bolt holes 39 so as to correspond to the bolt holes. FIG. 1 shows a position where the center O of the rotating shaft 7 is farthest from the lower frame plate 3, and at this time, the rear end gap between the movable plate 4 and the lower frame plate 3 is the largest. This position is defined as a reference mounting position, and the rotation angle α of the bearing member 8 is 0 °.

Next, all the bolts 36 are removed, the bearing member 8 is turned by a predetermined rotation angle α, and the bearing member 8 and the bolt holes 35 of the side frame plate 2 are aligned and tightened again with all the bolts 36. At this time, the center point O ′ of the rotating shaft 7 approaches the lower frame plate side by a distance e {1-cos (α)} from the point O of the reference mounting position, and the rear end of the movable plate 4 and the lower frame plate 3 The gap becomes smaller by that amount. Further, when tightening is performed at a position half a rotation (α = 180 °) from the reference mounting position, the rotating shaft 7 approaches the lower frame plate side by a distance 2e,
The rear end gap between the movable plate 4 and the lower frame plate 3 is the smallest, and the particle size can be safely and easily adjusted.

FIG. 9 shows a modification of the bearing material,
2 has the same insertion hole 33 as described above. The flange portion 44 of the bearing member 42 is formed in a regular octagonal planar shape, and the flange portion is not provided with a bolt hole. Meanwhile, cover 4
6 is formed with a regular octagonal flat recess 47 corresponding to the flange portion 44 on the inner surface thereof, and a plurality of bolt holes 48 is provided in the periphery to be bolted to the bucket side frame plate 2. The side frame plate 2 has screw holes that match the bolt holes 48 around the bearing material receiving holes, and the bolt holes and the screw holes may not be equally spaced in the circumferential direction.

To change the height position of the insertion hole 33 of the bearing member 42, all the bolts 49 are loosened to remove the cover 46, the bearing member 42 is turned by a predetermined rotation angle, and the cover 46 is bolted again. Just need. The planar shape of the flange portion 44 of the bearing member 42 and the concave portion 47 of the cover 46 may be other than a regular octagon, and may be set to a more complicated planar shape such as a graduated gear shape, and the height position of the insertion hole 33 may be changed more finely. It is also possible.

[0039]

The bucket with a built-in crusher according to the present invention comprises:
With both bearings attached to the bucket side frame plate, the height of the movable plate can be positioned simply by attaching and detaching its mounting bolts.
By easily changing the rear end gap between the movable plate and the bucket lower frame plate, it is possible to safely and easily adjust the particle size of the finely divided material to be obtained. The bucket of the present invention eliminates the need for complicated operations such as replacement of an adjustment plate and disassembly of a crusher as in a conventional bucket, which saves time and labor required for particle size adjustment, and a large number of bolts and adjustment plates. There is no need to prepare additional parts.

Further, in the bucket of the present invention, the opposing surfaces of the movable plate and the bucket lower frame plate are substantially flat, and no step due to the accessory is formed. The bucket of the present invention does not have a step between the movable plate and the bucket lower frame plate that hinders the movement of the crushed object. The crushing and the discharge of the finely divided material can be performed smoothly.

In the bucket of the present invention, a crush plate is attached to the opposing surface of the movable plate and the bucket lower frame plate, and a hard rod-shaped member is fixed to the surface thereof, so that the durability of the movable plate and the bucket lower frame plate is improved. . According to the present invention, the durability of the crushing plate itself is also improved, the burden such as replacement cost of the crushing plate is small, and the cost of maintenance and repair of these is small.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a bucket according to the present invention, which is cut along line XX of FIG.

FIG. 2 is a plan view of the bucket of FIG. 1;

FIG. 3 is a sectional view of a main part of the bucket of FIG. 1;

FIG. 4 is a side view showing a use mode of a bucket with a built-in crusher mounted on a work cart.

FIG. 5 is a plan view showing a back surface of a movable plate used for the bucket of FIG. 1;

FIG. 6 is a plan view of the movable plate of FIG.

FIG. 7 is a front view showing the movable plate of FIG. 5 from the direction of the line YY of FIG. 6;

8 shows a bearing material of a movable plate used for the bucket of FIG. 1, (1) is a center sectional view of the bearing material, and (2) is a front view of the bearing material.

FIG. 9 is a (1) central sectional view and (2) a front view showing a modified example of the bearing material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bucket built into crusher 2, 2 Bucket side frame plate 3 Bucket lower frame plate 4 Movable plate 5 Front opening 6 Rear opening 7 Rotating shaft 8 Bearing material 9 Hydraulic cylinder 10,10 Bracket part 26,26 'Crush plate 27,27 '' Bar-shaped wear-resistant member 33 Rotary shaft insertion hole

Claims (4)

[Claims] 1. A bucket mounted on a work vehicle such as a hydraulic shovel via a pair of brackets fixed to the four frame plates, the front and rear surfaces being constituted by four frame plates having openings and communicating with each other. The flat movable plate is opposed to the bucket lower frame plate in the bucket frame, bearing materials for supporting the rotating shaft of the movable plate are attached to the rear of the bucket side frame plates, and the rotating shaft is inserted into the inner end surface of the bearing material. The hole is formed at the eccentric position, and both bearings can be fixed at any rotational position with respect to the frame plates on both sides of the bucket, thereby adjusting the height position of the rotating shaft of the movable plate, and the movable plate and the bucket lower frame plate. A bucket with a built-in crusher with a variable rear end gap. 2. A plurality of through bolt holes are provided in the flange portion of the bearing material at equal intervals in the circumferential direction along a circle concentric with the center of the bearing body portion, while a bearing material receiving hole of the bucket side frame plate is provided. A plurality of screw bolt holes corresponding to the through holes are formed in the periphery of each, and each bolt is passed through an arbitrary through hole and a screw hole and tightened, so that both bearing materials are attached to the bucket side frame plate at an arbitrary position. The bucket according to claim 1, wherein the bucket is fixed at a rotation position and a rear end gap between the movable plate and the bucket lower frame plate can be changed. 3. A bucket mounted on a work vehicle such as a hydraulic shovel through a pair of bracket portions fixed to the four frame plates, the front and rear surfaces being formed of four frame plates having openings and communicating with each other. The movable plate having a substantially rectangular plane is opposed to the bucket lower frame plate in the bucket frame, and a bearing member that supports a rotating shaft behind the movable plate is attached to the rear of the bucket side frame plate,
At the inner end face of the bearing material, the insertion hole of the rotating shaft is formed at an eccentric position, and a crushing plate is installed on each of the opposing surfaces of the bucket lower frame plate and the movable plate, while one end of the hydraulic cylinder is placed behind the movable plate. By connecting and rotating the movable plate, when the crushed crushed material enters between the movable plate and the lower frame plate, the cylinder expands and contracts to move the movable plate closer to the lower frame plate. A bucket built into the crusher that crushes and discharges fines through the rear opening. 4. The bucket according to claim 3, wherein a plurality of rod-shaped wear-resistant members are arranged and fixed on the surface of the crushing plate attached to the opposing surfaces of the bucket lower frame plate and the movable plate.