JPH0739968Y2 - Vibrating bucket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bucket for a power shovel, and more particularly to a vibrating bucket equipped with a vibration generator.

[Conventional technology]

FIG. 6 shows a conventional example of a power shovel, in which an upper revolving structure 4 is provided above a lower traveling structure 2. A working machine 6 is provided in front of the upper swing body 4. The working machine 6 includes a boom 10 that is lifted and lowered by a boom cylinder 8 with respect to the upper swing body 4, an arm 14 that is supported by the tip of the boom 10 and that is operated by an arm cylinder 12, and an arm.
The bucket 18 is supported by the tip of 14 and is operated by a bucket cylinder 16. By interlocking each of these cylinders 8, 12, and 16, the bucket 18
Is being operated for excavation work.

Generally, some excavating machines such as power shovels are provided with means for vibrating the bucket in order to improve excavating performance.

For example, in Japanese Utility Model Laid-Open No. 59-76656, a switching valve is provided between the bucket cylinder and the bucket cylinder operating valve, the switching valve being switched by the supply pressure to the bucket cylinder.
A technique is disclosed in which the bucket cylinder is expanded and contracted by the action of the switching valve to vibrate the bucket.

Further, in Japanese Utility Model Laid-Open No. 1-69852, in a bucket of an excavator for an excavator-based excavator, an excavating tooth body is independent of a bucket body and is swingably supported on the body so that the excavating tooth body has an eccentric mass mechanism. And a vibration excavation bucket configured to provide vibration to the excavation tooth body by rotating the eccentric mass mechanism.

[Problems to be solved by the device]

Among the vibrating buckets disclosed in the above publications, the former requires (1) a large vibrating force because the entire bucket is vibrated, and (2) the entire working machine vibrates, resulting in operator fatigue. There is a problem to be solved such as increasing the degree.

Further, in the latter, although the excavated tooth body is independent of the bucket body and pivotally supported on the body,
Since the excavating tooth body itself is provided with the vibration generating device and the mass of the excavating tooth body is large, it substantially has the same problem to be solved as the former.

This invention was made on the basis of the above facts, and its main purpose is to enable efficient excavation work with a relatively small vibration generator, prevent vibration of the entire working machine, and prevent operator fatigue. It is to provide an improved vibrating bucket that can be reduced in degree.

[Means for Solving the Invention]

According to the present invention, the vibration generator mounted on the bucket body via the elastic body, the bucket teeth rotatably supported at the tip of the bucket body, and the vibration generator and the bucket teeth. A link mechanism that is provided between the bucket teeth and transmits the vibration of the vibration generator to the bucket teeth, and the link mechanism is configured to amplify the vibration force of the vibration generator and transmit the vibration to the bucket teeth. An oscillating bucket is provided.

〔Example〕

An embodiment of a vibrating bucket improved according to the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 3, a vibrating bucket generally designated by reference numeral 20 has a bucket body 22. Bucket body 22
A pair of support plates 24 and 26 are provided on the upper part of the above so as to project upward, and a pair of bucket pins 28 and 30 are supported by penetrating between the projecting portions. Bucket pin
The vibrating bucket 20 is supported by the arms of the work machine via 28 and 30.

A vibration generator 32 is attached (mounted) to the inside of the upper portion of the bucket body 22 via an elastic body 34, and a bucket tooth 36 is rotatably supported by a pin 38 at the lower tip end thereof. There is. On both sides of the bucket body 22, that is, on both outer sides of the side plates 22a and 22b, a link mechanism 40 that is provided between the vibration generator 32 and the bucket teeth 36 and transmits the vibration of the vibration generator 32 to the bucket teeth 36 is provided. It is provided. Each of the link mechanisms 40 is configured to amplify the vibration force of the vibration generator 32 and transmit the vibration force to the bucket teeth 36, as described later. Both link mechanisms 40 have side plates
It is covered by covers 42 and 44 provided on both outer sides of 22a and 22b.

As shown in FIGS. 4 and 5, the vibration generator 32 has a central casing 46 and other casings 48 and 50 attached to both ends thereof. A hydraulic motor 52 is provided inside the central casing 46, and the output shaft is connected from both ends of the hydraulic motor 52.
54 and 56 extend into the other casings 48 and 50. Since the configurations inside the casings 48 and 50 are substantially the same, the configuration inside the casing 48 will be described here, and the description of the casing 50 will be omitted.

The output shaft 54 is supported on the casing 48 by bearings 58, and a gear 60 is provided at the end thereof. Inside the casing 48, a pair of shafts 62 and 64 are provided as bearings 62a and 62b, respectively.
It is rotatably supported by 64a and 64b. Each axis 62
Substantially identical gears 66 and 68 are provided at one ends of the gears 64 and 64 and mesh with each other. This allows each axis 62
And 64 rotate in opposite directions and at the same speed. axis
Another gear 70 is further provided at the end of 62, and meshes with the gear 60 of the output shaft 54. The gear 70 has a smaller diameter than the gear 60, and is configured so that the rotation of the output shaft 54 is transmitted to the shaft 62 at an increased speed. Each shaft 62 and 64 has an eccentric weight
72 and 74 are fixed. Eccentric weights 72 and 74 axis
The mounting positions on 62 and 64 are 18 as shown in Fig. 5.
It is specified that the vectors in the centrifugal force directions should match each other when rotating by 0 degree. In the figure, the exciting force in the direction of arrow X (vertical direction) is obtained. Oscillation shafts 76 and 78 coaxially positioned are provided at both ends of the casings 48 and 50 so as to project in the axial direction.

The vibration generator 32 having the above-described configuration is attached to the inside of the upper portion of the bucket body 22 via the elastic body 34, as described above. Since both link mechanisms 40 connecting the vibration generator 32 and the bucket teeth 36 are substantially the same, only one side will be described here.

As shown in FIG. 1, the linkage 40 includes links 80, 82 and 84. The link 80 has one end connected to the bucket pin 28 and the other end connected to the vibration shaft 76. Link 82
Has one end connected to the vibration shaft 76 and the other end connected to one end of the link 84 via the pin 86. The link 80 and the link 82 form a toggle mechanism as shown. The other end of the link 84 is supported by the pin 38 at the lower tip of the bucket teeth 36, and the vibration plate 88 is fixed. The diaphragm 88 is provided across both links 84,
A plurality of bucket teeth 36 are fixed to the tip portion thereof. In this example, as shown in FIG. 1, the diaphragm 88 is attached so as to extend from the end of the link 84 with a slight offset in the extension direction of the link 84.

Stoppers 90 and 92 are fixed to the bucket body 22 at both side positions that restrict the rotation of the link 84 around the pin 38. A predetermined gap is provided between each of the stoppers 90 and 92 and the link 84. This gap is the vibration generator 32.
It does not interfere with the amplitude of the link 84 due to, and interferes with the movement of the link 84 over a specified amount due to the input from the bucket teeth 36 side, and is set so as to regulate excessive movement.

Next, the operation of the embodiment of the present invention constructed as above will be described.

In FIG. 4, when the hydraulic motor 52 of the vibration generator 32 rotates, the rotation is transmitted to the shafts 62 and 64, and the eccentric weights 72 and 74 rotate with them. Bucket body 22
On the other hand, the entire vibration generator 32 vibrates in the X direction (the direction in which the elastic body 34 expands and contracts) shown in FIG. 1 via the elastic body 34.
The vibration in the X direction is input as a force in a direction orthogonal to the radius of gyration to the tip of the link 80 via the vibration shafts 76 and 78. The link 80 reciprocally rotates (vibrates) around the bucket pin 28 as an axis. This vibration is transmitted as a movement in the Y direction to the link 82 that constitutes the toggle mechanism together with the link 80. The exciting force of the vibration generator 32 is amplified at the tip of the link 80 and transmitted to the link 82. The movement of the link 82 in the Y direction is transmitted to the link 84, and the link 84 reciprocally rotates (vibrates) around the pin 38. The movement of the link 84 is transmitted to the bucket teeth 36 via the diaphragm 88,
Bucket teeth 36 vibrate in the Z direction. The excitation force at the pin 86 portion of the link 82 is amplified by the ratio of the length L1 from the pin 86 to the pin 38 of the link 84 and the length L2 from the pin 38 to the tip of the bucket teeth 36 ( As is clear from Fig. 1, L1> L2). However, the amplitude of the tips of the bucket teeth 36 decreases in inverse proportion to the ratio of the same length.

If an excessive external force acts on the bucket teeth 36,
The link 84 contacts the stopper 90 or 92, and the vibration generator
It is possible to prevent excessive external force from being directly applied to 32.

A configuration in which the vibration of the vibration generator 32 is directly transmitted to the link 82 also holds. In that case, the direction of vibration input by the link 82 is preferably defined such that the link 84 produces the maximum moment with respect to the pin 38. Also in this example, the exciting force of the vibration generator 32 is the pin 86 of the link 84.
To pin 38 length and pin 38 to bucket teeth
It is amplified by the ratio of the length up to the tip of 36.

[Effect of device]

According to the invention described above based on the embodiment,
The following effects can be obtained.

(1) The vibration generator is attached to the bucket body via an elastic body. Therefore, the entire vibration generator vibrates in the expansion and contraction direction of the elastic body via the elastic body. That is, since the vibration of the vibration generator is significantly attenuated by the interposition of the elastic body and is difficult to be transmitted to the bucket body, the vibration of the bucket body, and thus the entire working machine, is significantly reduced, and the fatigue level of the operator is reduced. be able to. In addition, the durability of each part of the working machine is improved and the service life is extended.

(2) A link mechanism is used as a means for transmitting the vibration of the vibration generator to the bucket teeth, and the link mechanism is configured to amplify the vibration force of the vibration generator and transmit it to the bucket teeth. Therefore, as compared with the conventional device, the bucket teeth can be vibrated strongly with a small vibration force, so that the remarkably efficient excavation work can be performed. As a result, the vibration generator can be made more compact and the cost can be reduced.

(3) When the toggle mechanism is provided in the link mechanism, the vibration force can be effectively amplified, and the vibration generator can be made more compact than the conventional device.

(4) In the case where the bucket body is provided with a stopper that restricts the movement of the link mechanism by the input from the bucket teeth side, the excessive force can be prevented from being transmitted to the vibration generator. The damage can be prevented and the life can be extended.

The present invention has been described above in detail based on the embodiments, but the present invention is not limited to the above embodiments,
Various changes and modifications can be made within the scope of this invention.

[Brief description of drawings]

FIG. 1 is a side view showing a vibration bucket according to an embodiment of the present invention, with a part thereof shown in section. FIG. 2 is a view taken along the line II-II of FIG. FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1, showing a part in section. FIG. 4 is a vertical cross-sectional view of the vibration generator shown in FIG. FIG. 5 is a sectional view taken along the line VV of FIG. FIG. 6 is a side view of a conventional power shovel. 20 …… Vibration bucket 22 …… Bucket body 28 …… Bucket pin 32 …… Vibration generator 34 …… Elastic body 36 …… Bucket teeth 40 …… Link mechanism 52 …… Hydraulic motor 72,74 …… Eccentric weight 76, 78 …… Vibration axis 80, 82, 84 …… Link 90, 92 …… Stopper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-50-19204 (JP, A) Jikkaihei 1-174451 (JP, U) JP-B-44-21265 (JP, B1)

Claims (3)

[Scope of utility model registration request] 1. A vibration generator mounted on a bucket body via an elastic body, a bucket tooth rotatably supported at the tip of the bucket body, and a space between the vibration generator and the bucket tooth. And a link mechanism for transmitting the vibration of the vibration generator to the bucket teeth, and the link mechanism is configured to amplify the vibration force of the vibration generator and transmit it to the bucket teeth. A vibrating bucket characterized by being 2. The vibrating bucket according to claim 1, wherein the link mechanism includes a toggle mechanism that amplifies the vibration force of the vibration generator and transmits the vibration force to the bucket teeth. 3. The vibrating bucket according to claim 1, wherein the bucket body is provided with a stopper that restricts a movement of the link mechanism beyond a prescribed amount due to an input from the bucket teeth side. .