JPH11323996A - Skeleton bucket having sieve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bucket having a sieve device excellent in durability, capable of securing a vibration width large and capable of efficiently performing fine seiving work. SOLUTION: On the inside of a skeleton bucket having the penetrating part arranged at least in the bottom surface, both ends of a driving main shaft 21 are held by brackets 18A, 18B fixed to a bucket main body 11, a hydraulic motor 35 is installed on the brackets, an output shaft of the hydraulic motor is made eccentric to be fitted in the driving main shaft, the upper part of a support frame 27 on which a seive net 29 is detachably installed is joined by a link to the driving main shaft 21, and the lower part of the support frame is installed on the bucket main body through a cushioning material 30. When the hydraulic motor is rotated, the seive net seives earth/sand and crushed materials housed in the bucket main body by vibrating in the vertical and horizontal direction by interlocking with vibration of the driving main shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skeleton bucket equipped with a sieving device, which is attached to an arm of a hydraulic excavator in an attachment type, and performs various kinds of sieving work such as earth and sand, crushed material, and residual soil scraped into a skeleton bucket. It is done efficiently.

[0002]

2. Description of the Related Art Conventionally, stone materials generated when a building is demolished,
First, crushed pieces of concrete material and the like were crushed by a crusher, and as shown in FIG. 9, the crushed material was scooped into a skeleton bucket 2 having a lattice-shaped frame 1 provided on a bottom plate, and the skeleton bucket 2 was attached. By operating the arm 3 of the hydraulic excavator, a crushed material having a required size is dropped from the hole 1a partitioned by the frame 1 of the skeleton bucket 2, and sieving is performed according to the size of the crushed material. . In addition, not only the above-mentioned crushed material, but also cobblestone, gravel collection, and sieving of earth and sand were performed using a skeleton bucket in the same manner as described above.

[0003] Meanwhile, the skeleton bucket 2
In order to carry out sieving work with the excavator arm 3
Has to be moved, so that the operation speed is low, and as a result, there is a problem that sieving cannot be performed efficiently. If the operation of the skeleton bucket 2 is accelerated to increase the working efficiency, there is a problem that the operator of the hydraulic shovel takes time and fatigue.

[0004] In order to solve the above problem, the excavator is mounted on an arm of a hydraulic shovel so that the earth and sand, crushed material and the like scooped in a bucket can be sieved without operating the arm of the shovel during sieving. Such a sieve bucket has been proposed in Japanese Patent Application Laid-Open No. 5-187034.

The sieve bucket is shown in FIG.
In the configuration shown in (B) and (C), a penetration portion 2a 'is provided in the bucket body 2', and a penetration portion 4a which is in phase with the penetration portion 2a is provided inside the bucket body 2 '. The frame body 4 is housed, and the inner frame body 4 is fixed to the bucket main body 2 ′ via the vibration-proof rubber 5. A vibrating body 6 is fixed to the center of the upper wall of the inner frame 4 and the vibrating body 6 is driven by a hydraulic motor 7 attached to the vibrating body 6 to vibrate the inner frame 4 back and forth. Then, the crushed material and the like scooped into the inner frame 4 can be sieved.

[0006]

The above-mentioned sieve bucket is capable of sifting crushed materials, soil and the like scooped up in the bucket without operating the hydraulic excavator arm. Since the means is mounted on the inner frame body and the inner frame body is fixed to the bucket body via the vibration isolating rubber, the driving means itself is also vibrated, and the durability is deteriorated and a failure easily occurs. In addition, there is a problem that the vibration width is large and it is difficult to take.

Furthermore, since the inner frame body is merely provided with a penetrating portion and sieved, the size of the sieving is fixed and the size of the penetrating portion is considerably large, so that fine sieving work is required. It is not possible, and the sieving accuracy is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a bucket with a sieving device which has good durability, can have a large vibration width, and can perform a fine sieving operation efficiently. Is an issue.

[0009]

According to the present invention, a pair of brackets are fixed to a bucket body of a skeleton bucket having an opening at least on a bottom surface so as to be located on inner surfaces of both side walls. A drive spindle is mounted between the brackets, the drive spindle is eccentrically driven by a hydraulic motor attached to the bracket, and the drive spindle extends from the drive spindle toward the open end of the bucket body. A supporting frame is provided, the front end side of the supporting frame is supported on both side walls of the bucket body via cushioning materials, and a sieve net is detachably mounted on the supporting frame, and the driving main shaft is driven by a hydraulic motor. A configuration in which the eccentric drive is used to vibrate the sieve mesh through the support frame, and the sediment or crushed material stored in the bucket body is sieved through the sieve mesh. It provides a sieving device Skeleton buckets, characterized by that.

In the skeleton bucket with a sieving device having the above structure, the sieving device is housed in a standard type skeleton bucket, and a hydraulic motor, which is a driving means of the sieving device, is fixed to a bracket fixed to the bucket body. Since the main shaft is configured to be driven eccentrically by the hydraulic motor, the hydraulic motor itself of the driving means can be firmly fixed in a stable state without being directly subjected to vibration, thereby improving the durability of the hydraulic motor. Can be.

The sieving device is mounted in the bucket body by supporting both ends of the drive main shaft with brackets fixed to the bucket body, so that the sieving device can be firmly mounted in the bucket body. it can. In addition, since the front end side of the support frame for supporting the sieve mesh projecting from the driving main shaft is connected to both side walls of the bucket body via a cushioning material such as rubber, the support frame is supported without obstructing the vibration of the support frame. The front end of the frame can be held at the opening end side of the bucket body.

Further, the lower portion of the support frame is supported on the opening side of the bucket body via the cushioning material, and the upper portion of the support frame is supported on the drive spindle side. The distance between them can be lengthened,
The support frame can be vibrated in a more stable state.

Further, since a sieve net separately provided on the support frame is detachably attached,
Sieve nets having different meshes can be attached according to the application, and sieving accuracy can be improved.

The cushioning material has a metal plate adhered and fixed to both end surfaces of a columnar rubber material, and the metal plates on both surfaces are fixed to the support frame and the side surfaces of the bucket body by bolts and nuts ( Claim 2).

As described above, when the cushioning material is made of rubber,
It can follow the vibration by the shear deformation and the compression deformation which are the characteristics of rubber, and generate no noise even during the vibration. In addition, lubrication is not required for deformation due to vibration, and maintenance is facilitated. Further, when the shape of the cushioning member is cylindrical, it can be uniformly sheared against any radial vibration.

The hydraulic motors are a pair of hydraulic motors mounted on the outer surfaces of a pair of brackets fixed to the main body, and the output shafts of these hydraulic motors are eccentrically inserted into both ends of the driving main shaft and are rotated synchronously. In this way, by rotating both ends of the driving main shaft synchronously by the pair of hydraulic motors,
The driving force can be increased, and the sieve mesh can be vibrated through the support arm by driving against the weight of earth and sand or a large amount of crushed material. In addition, by eccentrically inserting the output shaft of the hydraulic motor into the drive spindle, the drive spindle can be vibrated vertically and horizontally with a simple configuration.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. In the exploded perspective view shown in FIG.
Reference numeral 1 denotes a standard skeleton bucket body (hereinafter, abbreviated as a bucket body), and reference numeral 20 denotes a sieving device attached to the inside of the bucket body 11.

The bucket body 11 has substantially the same structure as a standard skeleton bucket, and includes left and right side frames 12A and 12B, a top frame 13, a bottom end frame 14, and a back and bottom portion of the bucket body. The supporting shafts 15A and 15B pass therethrough, and these frames and the like constitute an earth and sand storage section C having a substantially triangular cross-section and an opening K from the back to the bottom.

The rod-shaped support shafts 15A, 15B
By connecting the left and right frames 12A and 12B with each other, the rigidity of the bucket body is increased. In place of the support shafts 15A and 15B, as shown in FIG.
May be provided to constitute the bucket body 11 ′.

The bottom end frame 14 of the bucket body 11
A rake claw 16 is protrudingly provided at a predetermined interval from the tip of. In addition, a mounting bracket 17 for attaching to the arm of the excavator is provided on the outer side of the bucket of the upper frame 13 so as to protrude.
Inside the bucket, a pair of brackets 18A and 18B for mounting the drive
A and 12B protrude along the inner surface side.

The sieving device 20 housed inside the bucket body 11 comprises a driving main shaft 21, a support frame 27, a sieving net 29, a cushioning member 30, and a hydraulic motor 35 for generating vibration.

As shown in FIGS. 1 and 3, the drive main shaft 21 comprises a cylindrical outer shaft 22, an inner shaft 23, and a bearing 24. Bearings 24 are fitted inside both ends of the outer shaft 22, and the inner shaft 23
Is fitted at one end. A bearing 25 is externally fitted to the other end of the inner shaft 23, and the drive main shaft 21 is attached to brackets 18 </ b> A and 18 </ b> B protruding from the bucket body 11 via the bearing 25. A pair of arms 26A, 26B for connecting a support frame 27 is projected from the outer shaft 22 mounted between the left and right side frames 12A, 12B via the inner shafts 23 on both sides.

As shown in FIGS. 1 and 4, the support frame 27 has side plates 27a having a shape bent in the horizontal direction from the vertical direction and arranged on both left and right sides, and bar-shaped frame bars 27b arranged on both upper and lower sides. Outer frame part 27c
Is composed. The inside intersects the vertical plate 27d in a grid pattern and connects the horizontal bar 27e to form a grid portion 27f, which is joined to the outer frame portion 27c. The outer shaft 22 of the drive main shaft 21 and the arm 2
A pair of mounting parts 2 for connecting via 6A, 26B
8A and 28B are projected.

As shown in FIGS. 1 and 4, the sieve net 29 is made of a porous metal such as a metal mesh or a punched metal and has a strength. It is bent in the direction. The sieve net 29 depends on the use after sieving.
Bolts 40A are attached to the upper surface of the support frame 27 so that sieve nets having different finenesses can be appropriately replaced.

The support frame 27 and the sieve net 29 are not limited to the shape bent in the horizontal direction from above and below. For example, as shown in FIG. It may be configured to be arranged on the bottom side.

As shown in FIG. 6, the cushioning member 30 is formed by connecting a metal connecting plate 30 to both ends of a columnar rubber 300.
1, 302 are bonded by vulcanization, and bolt holes 3
01a and 302a are provided.

The rubber 300 is made of natural or synthetic rubber, and can follow the generated vibration due to the shear deformation and compression deformation of the rubber. No lubrication is required. When synthetic rubber is used, the amount of shear deformation and compression deformation with respect to vibration can be set by appropriately selecting the constituent components of rubber. Further, if the rubber 300 is stationary without vibrating, the rubber 300 maintains a constant state.
The positioning of the support frame 27 attached to the device can be achieved.

Further, since the rubber 300 is formed in a cylindrical shape, it can follow the vibration by uniformly shearing and deforming the vibration in any radial direction. The diameter and height (length) of the cylinder are determined in consideration of the weight of earth and sand or crushed material to be put in the bucket body as much as possible, and the amount of deformation with respect to the load due to vibration.

The support frame 27 is connected to the bucket body 11
In order to mount it inside, the upper portion of the support
As shown in FIG. 3, an arm 26 protruding from the drive spindle 21 is provided.
A, 26B and mounting portions 28A, 28B of support frame 27
And a link 32 via a pin 32. Support frame 27
At the lower end of the support frame 27, as shown in FIG.
One connection plate 301 of the cushioning material 30 is fixed to the outside of the left and right side plates 27a with bolts 40B. The other connection plate 302 is fixed to the inner surfaces of the left and right side frames 12A, 12B of the bucket body 11 with bolts 40B,
The lower end of the support frame 27 and the bucket body 11 are elastically connected.

As described above, the upper end of the support frame 27 is connected to the drive spindle 21, and both lower sides of the lower end of the support frame 27 are connected to the bucket body 11 via the cushioning material 30. Since the portion is used as a support fulcrum, the distance between the fulcrums is increased, and the support frame 27 can be stably vibrated. Further, since the upper end of the support frame 27 is connected to the drive spindle 21 side, the support frame 27 can swing about the pin 32 in conjunction with the movement of the drive spindle 21.
Further, the lower part of the support frame 27 can follow the movement of the upper part of the support frame 27 within the elastic deformation range of the rubber 300 of the cushioning material 30. Further, a cover 33 is provided around the cushion rubber 30 to prevent earth and sand and crushed material from entering, and to prevent damage to the cushion rubber 30 due to them.

When setting the position where the support frame 27 is accommodated in the bucket body 11, the support frame 2
In consideration of the range of movement of the upper portion 7 by the link connection and the range of elastic deformation of the rubber of the cushioning material attached to the lower end of the support frame 27, even if the support frame 27 vibrates, it may interfere with the bucket body 11 or support The gap between the frame 27 and the bucket body 11 is too wide to prevent large crushed materials from being caught.

As shown in FIG. 3, the hydraulic motors 35 for generating vibration are fixed to the outer surfaces of the support brackets 18A and 18B fixed to the bucket body 11, respectively, and are located at both ends of the drive spindle 21. The 35 output shaft 36 is fitted to the inner shaft 23 of the driving main shaft 21 eccentrically from its center axis. The hydraulic motor 35 is driven by a hydraulic pump of a hydraulic shovel (not shown) to which the bucket body 11 is attached, and supplies hydraulic oil via piping. In addition,
The hydraulic motors 35 provided at both ends of the driving spindle 21 are:
When the bucket body 11 is small, it may be provided at only one end to simplify the structure.

When the hydraulic motors 35 provided at both ends of the drive spindle 21 are rotated synchronously, the inner shaft 2 of the drive spindle 21 is rotated.
Reference numeral 3 rotates around an eccentric shaft, and the outer shaft 22 reciprocates vertically and horizontally in accordance with a locus of rotation of the inner shaft 23 about the eccentric shaft.

The amount of eccentricity of the eccentric shaft with respect to the center axis of the inner shaft 23 is set in consideration of the size of the bucket body 11, the amplitude desired to vibrate vertically and horizontally, and the like. 27 does not interfere. In addition, X shown in FIG. 4 represents a horizontal direction in which the outer shaft 22 vibrates, and Y represents a vertical direction.

When the outer shaft 22 of the driving main shaft 21 vibrates vertically and horizontally as described above, the support frame 27 is linked with the vibration of the outer shaft 22 by linking on the upper part of the support frame 27, and the support frame 27 moves vertically and horizontally. The lower part of the front end of the support frame 27 follows the movement of the upper part of the support frame 27 by elastic coupling.
Accordingly, when the movement of the support frame 27 is viewed as a whole, the support frame 27 vibrates repeatedly in vertical and horizontal directions with the upper and lower portions as fulcrums.

Actually, in order to scoop up the earth and sand or crushed material with the bucket body 11 and perform the sieving operation, the bucket body 11 is attached to the arm 3 of the hydraulic shovel as shown in FIG. And attach it. Next, the arm 3 is operated, and the sieve net 2 is
9 Scoop up the earth and sand and crushed material. When the hydraulic motor 35 is driven, the support frame 27 with the sieve mesh 29 attached thereto
Vibrates in such a manner as to move up and down and horizontally, so that the earth and sand and the crushed material on the sieve net 29 bounce up and down and are shaken in the horizontal direction, and are efficiently sieved to a required size.

As described above, in the skeleton bucket, the sieve mesh 29 is vibrated in the vertical direction in addition to the horizontal direction, so that the sediment and crushed material on the sieve mesh 29 can be quickly sieved. Performance can be greatly increased. In addition, since the bucket body 11 has a normal large storage capacity, the arm 3 of the excavator can be operated to easily and easily scoop a large amount of soil, crushed material, and the like into the bucket body 11. The sieving operation can be performed in large quantities at one time.

Further, since the sieving device 20 is connected to the bucket body 11 via the bearing 25 and the cushioning material 30, the vibration of the sieving device 20 is not transmitted to the operator of the excavator, and the bucket body 11 and the sieving device 20 are not transmitted. Can be improved in durability. Moreover, the cushioning member 30 does not require lubrication, and does not generate noise even during vibration.

[0039]

As is clear from the above description, according to the skeleton bucket with the sieving device according to the present invention,
Both ends of the drive main shaft of the sieving device housed in the bucket main body are attached to the bucket main body by being supported by brackets fixed to the bucket main body, and the front end of a sieve mesh supporting support frame connected to the drive main shaft is connected. Since it is fixed to the bucket body via the cushioning material, both ends of the sieving device can be connected to the bucket body and stably held.

Further, in order to vibrate the driving main shaft of the sieving device in two directions, vertical and horizontal, the sieve mesh attached to the supporting frame interlocking with the driving main shaft not only reciprocates in the horizontal direction but also moves in the vertical direction. It reciprocates and vibrates, and the soil and the like on the sieve net can be sieved very efficiently.

Further, the drive mechanism of the sieve net has a simple structure in which the output shaft of the hydraulic motor is eccentrically fitted to the drive main shaft and is fitted inside. The hydraulic motor is fixed to a bracket fixed to the bucket body. Therefore, it can be stably held without directly receiving the generated vibration, the durability can be increased, and the number of maintenance items can be reduced.

Further, since the sieving device is supported on the bucket body by a cushioning material using rubber, damage to the device due to vibration can be eliminated, and durability can be improved.
Noise can also be reduced. In addition, since the bucket body is not vibrated, the fatigue of the operator of the hydraulic shovel to which the bucket is attached via the arm can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the present invention.

FIG. 2 is a perspective view of a modified example of the skeleton bucket according to the present invention.

FIG. 3 is a partially cutaway plan view showing a rear part of the present invention.

FIG. 4 is a cutaway side view of the present invention.

FIG. 5 is a perspective view showing a modification of the support frame and the sieve net according to the present invention.

FIG. 6 is a perspective view of a cushioning material according to the present invention.

FIG. 7 is a partially cutaway plan view showing a coupling portion between a driving spindle and an upper portion of a support frame according to the present invention.

FIG. 8 is a plan view showing a joint between the skeleton bucket and the support frame via a cushioning material according to the present invention.

FIG. 9 is a perspective view of a conventional skeleton bucket.

FIGS. 10A, 10B, and 10C are views showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Bucket main body 12A, 12B Side frame 13 Top frame 14 Bottom end frame 15A, 15B Support shaft 18A, 18B Bracket 20 Sieve device 21 Driving main shaft 22 Outer shaft 23 Inner shaft 24, 25 Bearing 26A, 26B Arm 27 Support frame 28A, 28B mounting part 29 sieve net 30 cushioning material 300 rubber 301, 302 connection plate 35 hydraulic motor

Claims (2)

[Claims] 1. A pair of brackets are fixed to a bucket body of a skeleton bucket having an opening at least on a bottom surface so as to be located on inner surfaces of both side walls, and a driving spindle is mounted between the brackets. The drive spindle is eccentrically driven by a hydraulic motor attached to the bracket, and a support frame extending from the drive spindle to the open end side of the bucket body is provided. While supporting on both side walls of the main body via cushioning material, a sieve net is detachably mounted on the support frame, and the driving main shaft is eccentrically driven by a hydraulic motor to vibrate the sieve net through the support frame. A skeleton with a sieving device, characterized by sifting earth and sand or crushed matter stored in a bucket body through the sieving net. bucket. 2. The cushioning member has a metal plate adhered and fixed to both end surfaces of a columnar rubber material, and metal plates on both sides are fixed and attached to side surfaces of the support frame and the bucket body with bolts and nuts. A skeleton bucket with a sieving device according to claim 1.