JPS62233347A - Bucket assembly for earthwork vehicle - Google Patents

Abstract

PURPOSE:To suppress the lowering of bucket capacity by a method in which a bucket supporter is rotatably connected to the bucket body, the cylinder of a cylinder mechanism is rotatably connected to the connecter of the bucket, and the rod portion is rotatably connected to the connecter of the bucket supporter. CONSTITUTION:The first connecter 12 is provided to the back side of the body 10 of a bucket 4, and the second connecter 24 is provided to a connecter 22 fixed between the supporters 18 and 20 of the body 16 of a bucket supporter 6. The tips of the front extended portions 18a and 20a of the supporters 18 and 20 are rotatably connected to the lower end of the body 10 through pins 34. The shaft 40a of the cylinder 38 of a trunnion type fluid-pressure cylinder mechanism 36 is rotatably set between the upper and lower parts 14b and 14a of the connecter 12. The end of the rod 40 of the mechanism 36 is rotatably connected to the connecter 24 through a pin 42.

Description

[Detailed description of the invention] Technical fields> The present invention relates to a bucket assembly for an earthmoving vehicle.

<Conventional technology> Earthmoving vehicle IF? It is equipped with a bucket assembly and performs tasks such as loading onto trucks. Conventionally, a large earthmoving vehicle or an earthmoving vehicle with a specially extended lift arm has been used when loading to a high position or onto a large truck.

However, large earthmoving vehicles have a high purchase price (while earthmoving vehicles with extended lift arms have longer lift arms than standard ones, especially when the bucket oversolds forward and excavates). There was a problem that the force and bucket lifting blade were reduced, and the overturning load was also reduced.

Therefore, in order to solve the above-mentioned problems, a so-called high dump bucket assembly has recently been proposed and put into practical use, which allows loading to a high position without extending the lift arm.

As an example of such a high dump bucket assembly,
For example, it may include a bucket, a bucket support, and a cylinder mechanism, the lower end of the bucket is rotatably attached to the front protrusion of the bucket support, and the cylinder mechanism interposed between the bucket and the bucket support is placed horizontally at the bottom of the bucket. There is something that exists. However, in this type of bucket assembly, since the cylinder mechanism is placed horizontally above the front protrusion of the bucket support, an accommodation space is provided at the bottom of the bucket to accommodate the cylinder mechanism in the bucket storage state. There is a need.

Therefore, a protrusion is formed on the inner surface of the bucket, resulting in a reduction in the bucket capacity.In addition, when soil with a high moisture content is handled, there is a problem in that soil or the like adheres to the inner surface of the bucket. Another problem is that it is structurally difficult to increase the distance between the center axis of the cylinder mechanism and the axis passing through the swing center axis of the bucket in the bucket delivery state (this results in a significant decrease in bucket capacity). Therefore, in order to obtain sufficient holding force during normal excavation, a large-diameter cylinder mechanism or a plurality of cylinder mechanisms is required, and there is also a risk that this cylinder mechanism may come into contact with earth and sand and be damaged.

Furthermore, as another example of a high dump bucket assembly, there is one in which the cylinder mechanism is placed vertically on the back of the bucket instead of horizontally on the bottom of the bucket. but,
This type of bucket assembly does not require a storage space in the bucket delivery state, but it is necessary to provide a space on the back of the bucket to allow the bucket to rotate when the cylinder mechanism is extended and placed in the dump state. . Therefore, even in this type of bucket, a protrusion is formed on the inner surface of the bucket, and there is a problem in that the bucket capacity is reduced in the same manner as described above. In addition, due to the difficulty in increasing the distance between the central axis of the cylinder mechanism in the dumping state and the axis passing through the center of rotation of the bucket, it is difficult to obtain sufficient holding force in the dumping state. There is a risk that the cylinder mechanism will be damaged during scraping or scraping operations.

<Object of the Invention> The present invention has been made in view of the above-mentioned facts, and its main purpose is to provide an excellent bucket assembly that can solve the above-mentioned problems and significantly reduce the waste space of the cylinder mechanism. It is to provide.

<Summary of the Invention> As a result of extensive studies, the present inventor used a trunnion-type fluid pressure cylinder mechanism as a cylinder mechanism for a dump truck, connected the cylinder portion of this fluid pressure cylinder mechanism to a bucket in a rotatable manner, and fixed its loft. It has been found that if the bucket is rotatably connected to the bucket support, there is no need to provide a large space in the bucket as in the conventional case, and sufficient holding force can be obtained with a relatively small cylinder mechanism.

That is, according to the present invention, a bucket assembly for an earthmoving vehicle includes a bucket, a bucket support, and a cylinder mechanism interposed between the bucket and the bucket support; comprising a first connecting means provided on the back of the main body,
The bucket support includes a support body and a second connection means provided on the support body, the lower extension of the support body extending forward on the underside of the bucket body, and the distal end of the support body extending forwardly on the underside of the bucket body. The cylinder mechanism includes a trunnion-type hydraulic cylinder mechanism, and the cylinder portion of the hydraulic cylinder mechanism is pivotally connected to the first connecting means of the bucket. A bucket assembly is provided, wherein the loft portion is pivotally connected to the second connection means of the bucket support.

<Preferred Embodiments of the Invention> Hereinafter, an integrated example of a bucket assembly constructed according to the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1, the illustrated bucket assembly 2 includes a bucket 4, a bucket support 6, and a cylinder mechanism 8 interposed between the bucket 4 and the bucket support 6.

Referring to FIG. 2 together with FIG.
The bucket body 10 is provided with a bucket body 10 which may have an appropriate shape suitable for work such as loading. Then, the width direction of the back side (direction perpendicular to the paper surface in Figure 1, left and right direction in Figure 2)
A first connecting means 12 is provided substantially at the center, and in the specific example, substantially at the center in the vertical direction of the center (FIG. 1).

The illustrated first connecting means 12 includes a pair of lower members 14a fixed to the back surface of the bucket body 10 and a bolt (not shown).
It consists of an upper member 14b attached to each lower member 14a via (see also FIG. 4).

With reference to FIGS. 1 and 3, the bucket support 6 is
A support body 16 having a lower extension is provided. The illustrated support body 16 includes a pair of spaced apart support members 18 and 20, and a pair of support members 18 and 2.
It has a connecting member 22 fixed between 0 and 0. Each of the pair of support members 18 and 20 is constituted by an abbreviated plate member, and has front extension portions 18a and 20a and upper extension portions 18b and 20b. Further, the connecting member 22 is composed of a tubular member, and the supporting members 18 and 2
0 front extension portions 18a and 20a and upper extension portions 18b and 2
It is fixed between the connection part with 0b. In the specific example, the connecting member 22 is provided with a second connecting means 24 . The illustrated second coupling means 24 is comprised of a pair of coupling brackets 26 fixed to the coupling member 22. Further, auxiliary connecting members 28 and 30 are also fixed between the pair of supporting members 18 and 20. Auxiliary connecting member 28
is secured between the front extensions 18a and 208 of support members 18 and 20, and the auxiliary connection member 30 is secured between the front extensions 18a and 208 of support members 18 and 20.
It is fixed between the free ends of the upper extending arc portions 18b and 20b.

The bucket 2 and the support 4 are rotatably connected as shown in FIG. To further explain, the front extensions 18a and 20a of the support members 18 and 20 (which constitute the lower extension of the support body 16) are attached to the bucket body 1.
It extends forward on the lower side of 0a. On the other hand, bucket body 1
A recess extending forward from the back surface is formed at approximately the center in the width direction of the lower surface of the bucket body 10 (in order to define this recess, a protrusion as shown in FIG. 2 is formed on the inner surface of the bucket body 10). 32 is present), in the bucket delivery state, the front extensions 18a and 20a of the support members 18 and 20 are located within the recesses and extend forward. The front end portions of the front extension portions 18a and 20a are each pivotally connected to a portion defining the side wall of the protrusion portion 32 of the bucket body 10 via a pin member 34 (see also FIG. 2). ), Therefore, in the specific example, the tip of the lower extension portion of the support body 16 is rotatably connected to the lower end of the bucket body 10 at approximately the center in the front-rear direction via the pin member 34, and the bucket 4 is connected to the pin member 34. It is pivoted about the member 34 relative to the bucket support 6.

In the bucket assembly 2 according to the present invention, the cylinder mechanism 8 is composed of a trunnion-type hydraulic cylinder mechanism 36, the cylinder part 38 of which is connected to the first connecting means 12 of the bucket 4, and the rod part 40 of the cylinder part 40 is connected to the bucket support. It is important to connect to the second connecting means 24 of 6. In the specific example, the cylinder portion 38 of the fluid pressure cylinder mechanism 36 has shaft portions 40a and 40b that protrude on both sides.
The cylinder portion 38 is pivotally connected to the first connecting means 12 by mounting the shaft portions 40a and 40b between the pair of lower member 14a and upper member 14b, respectively. Additionally, the fluid pressure cylinder mechanism 38
A connecting portion is provided at the end of the rod portion 40, and by attaching the connecting portion between the pair of connecting brackets 26 via the pin member 42, the rod portion 40 is connected to the second rod portion 40.
It is rotatably connected to a connecting member 24 of. Therefore,
When the hydraulic cylinder mechanism 36 is extended, the bucket 4 is pivoted about the pin member 34 in the dumping direction shown by arrow 44 (FIG. 1), and when the large hydraulic cylinder mechanism 36 is retracted, the bucket 4 is is pivoted about the pin member 34 in the rank back direction shown by arrow 46 (FIG. 5).

The bucket assembly 2 described above is detachably attached to a support body 48 equipped on an earthmoving vehicle as follows. Referring again to FIG. 1, each of support members 18 and 20 includes:
Hook portions 5 are provided at the tips of the upper extending arc portions 18b and 20b, respectively.
0 and 52 (the hook portions 50 and 52 define the receiving portions of the support body 16), and through holes 54 and 56 are formed at their bases (defining pin holes).

On the other hand, the support body 4 has a pair of support plates 58 (only one of which is shown in FIG. 1) spaced apart,
An engagement rod 60 is fixed between the upper ends of the pair of support plates 58. The earthmoving vehicle (not shown) includes a pair of lift arms 62 and a pair of tilt links 64 (only one of which is shown in FIG. 1), and the tip of each lift arm 62 is connected to the lower end of the support plate 58 The tips of the tilt links 64 are pivotally connected to the intermediate portions of the support plate 58, respectively. The support 48 further includes a pair of retaining pins 66 (see FIG. (only one of which is shown).

With this configuration, the lift arm 62 of the earthmoving vehicle
and by operating the tilt link 64, the engaging rod 60 of the support body 48 is inserted into the hook portions 50 and 52 of the support members 18 and 20 from below to engage them with each other,
Thereafter, actuating means (not shown) is actuated to insert each retaining pin 66 into the through holes 54 and 56 of the corresponding support members 18 and 20. In this way, the engagement rod 60 is removably received in the hook portions 50 and 52 of the support members 18 and 20, that is, the receiving portion of the support body 16, and each retaining pin 66 is inserted into the through hole of the support members 18 and 20. 54 and 5
6, that is, the bucket assembly 2 is removably received in the pin hole of the support body 16, and thus the bucket assembly 2 is removably attached to the support body 48 shown in double-dashed lines in FIG. 1 as required.

In the bucket assembly 2 described above, the bucket 4 is in the state shown in FIG. 1, for example, in the bucket delivery state. That is, the support members 18 and 20 of the support body 16
The front extension portions 18a and 20a of the bucket body 10 are housed in recesses defined on the lower surface of the bucket body 10, and the hydraulic cylinder mechanism 36 is placed vertically in the vertical direction.

For example, when the dump hydraulic cylinder mechanism 36 is extended in the delivery state shown in FIG. The vehicle is turned in the dumping direction shown in Figure).

The collected earth and sand are discharged to the outside and loaded onto a truck, for example. When the bucket body 10 is pivoted as described above, the bucket body 10 is pivoted around the pin member 34, in other words, the tip of the lower extension portion of the support body 16, so that the lift arm 62 of the earthmoving vehicle is raised ( For example, in the highest position), the bucket body 10
The support body 16 is pivoted to a higher position relative to the length of the lower extension of the support body 16 than in the prior art and placed in a dumping position.

On the other hand, for example, when the hydraulic cylinder mechanism 36 is contracted in the dump state shown in FIG. It is rotated in the rack back direction and becomes the bucket delivery state shown in FIG.

As shown in FIGS. 1, 3, and 5 of the specific example, the bucket body 1 is attached to the front end of the support body 16, specifically, to the front ends of the upper extending arc parts 18b and 20b of the support members 18 and 20.
It is preferable to provide a stop piece 70 that comes into contact with the back surface of the bucket 4 and prevents the bucket 4 from pivoting beyond the position shown in FIG. 1 in the rank back direction indicated by the arrow 46. It is possible to reliably maintain the bucket net machine state shown in the figure.

In the specific example described above, the bucket assembly is configured to be removably attached to the support connected to the lift arm and tilt link of the earthmoving vehicle, but instead of this, the bucket support of the bucket assembly can be attached directly to the lift arm. and a tilt link. At this time, if the tilt link is connected to the widthwise central portion of the bucket support, a trunnion-type fluid pressure cylinder mechanism may be interposed between the bucket support and both ends of the bucket.

<Effects of the Invention> In the bucket assembly 2 according to the present invention, a trunnion type fluid pressure cylinder mechanism 36 is used as the dump cylinder mechanism 8, and the cylinder portion 38 of the fluid pressure cylinder mechanism 36 is connected to the bucket 4, and the rod thereof is connected to the bucket 4. Since the configuration is such that the section 40 is connected to the bucket support 6,
It is possible to significantly reduce the space for the cylinder mechanism 8 in the bucket 4, suppressing a decrease in bucket capacity, and even with a relatively small hydraulic cylinder mechanism 36, sufficient holding force can be obtained, and It is also possible to protect the pressure cylinder mechanism 36 from dirt and the like. In addition, in relation to the space for the fluid pressure cylinder mechanism 36, the shaft portions 40a and 40b (the connection portion to the first connection means 12 provided in the bucket body 10) of the fluid pressure cylinder mechanism 36 are shown as specific examples. In particular, as shown in FIGS. 1 and 5, it is preferable to provide the cylinder portion 38 at the loft side end.
As shown in FIGS. 1 and 5, a space for the fluid pressure cylinder mechanism 38 in the bucket 4 (in other words, a protrusion formed on the inner surface of the bucket body IO due to the space)
can be virtually eliminated.

Substantially the same effect can be achieved even if these shaft portions 40a and 40b are provided at the intermediate portion of the cylinder portion 38 instead of at the rod side end portion, but in this way, the space for the fluid pressure cylinder mechanism 36 is reduced to a bucket. I need some on the back of 4. In addition, in relation to the holding force of the bucket 4, by configuring as in the specific example, the distance Ll in the bucket netting machine state of FIG. The distance Lz in the dump state in FIG. can be made larger,
As a result, sufficient bucket holding force can be obtained even with a relatively small hydraulic cylinder mechanism 36.

[Brief explanation of drawings]

FIG. 1 is a side view showing an example of a bucket assembly constructed in accordance with the present invention in a bucket net machine state. 2 is a perspective view of the bucket of the bucket assembly of FIG. 1, seen from the front side; FIG. FIG. 3 is a perspective view of the bucket support of the bucket assembly of FIG. 1, seen from the front side. 4 is a partial rear view showing the cylinder mechanism and its vicinity of the bucket assembly of FIG. 1; FIG. FIG. 5 is a side view showing the bucket assembly of FIG. 1 in a dump state. 2...Bucket assembly 4...Bucket 6...Bucket support 8...Cylinder mechanism IO...Bucket body l2...First connection means 16...Support body 1...Support Members 18a and 20a...front extension parts 18b and 20b...upper extension part 24...second connection means 36...trunnion type fluid pressure cylinder mechanism 38...
Cylinder part 40...Rod part 48...Support body 62...Lift arm 64...Tilt link.

Claims (1)

[Claims] 1. A bucket assembly for an earthmoving vehicle comprising a bucket, a bucket support, and a cylinder mechanism interposed between the bucket and the bucket support: The bucket includes a bucket body and a cylinder mechanism interposed between the bucket and the bucket support. the bucket support comprises a first coupling means provided on the back of the bucket body, the bucket support comprising a support body and a second coupling means provided on the support body, the lower extension of the support body being connected to the bucket support body; The cylinder mechanism extends forward on the lower side of the main body, and its tip is pivotally connected to the lower end of the bucket main body, and further, the cylinder mechanism is composed of a trunnion type fluid pressure cylinder mechanism, A bucket assembly, wherein a cylinder portion is pivotally connected to the first connecting means of the bucket, and a rod portion is pivotally connected to the second connecting means of the bucket support. 2. The bucket assembly according to claim 1, wherein the distal end of the lower extension portion of the support body is pivotally connected to the substantially central portion of the lower end of the bucket body in the front-rear direction. 3. The support body includes a receiving part that removably receives a part of the support body connected to the lift arm and tilt link of the earthmoving vehicle, and an engagement pin for connecting to the support body. 3. A bucket assembly as claimed in claim 1 or claim 2, wherein the bucket assembly is provided with a freely receiving pin hole. 4. The support body has a pair of substantially L-shaped support members spaced apart, and a connecting member fixed between the pair of support members, and each of the pair of support members has a Respectively,
4. The bucket assembly according to claim 3, further comprising a hook portion defining the receiving portion and a through hole defining the pin hole. 5. Each of the pair of support members has a front extension portion extending forward on the lower side of the bucket body, and the tip of each front extension portion is pivotably attached to the lower end of the bucket body. 5. The bucket assembly of claim 4, wherein the bucket assembly is coupled and wherein the coupling member is provided with the second coupling means. 6. Each of the front ends of the pair of support members is provided with a stop piece that comes into contact with the back surface of the bucket body to prevent the swing movement beyond a predetermined position in the rack back direction. A bucket assembly according to claim 4 or 5.