JPS636691B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bucket cart assembly for an earthmoving vehicle, and more particularly to a bucket cart assembly for an earthmoving vehicle that also allows side discharge.

When carrying out earthwork work by equipping an earthmoving vehicle with a bucket assembly, for example when the work site is inside a tunnel, the earth and sand loaded in the bucket should be discharged forward as in normal cases. It is often desirable to drain to the side instead.

Therefore, a so-called three-way type bucket assembly that is capable of discharging not only the front but also the left side or the right side as necessary has been proposed and put into practical use. A conventional three-way bucket cart assembly is supported by a bucket support that is attached to the lift arm and tilt link of an earthmoving vehicle, and a pair of removable pivot pins installed on both sides of the bucket support. A hydraulic cylinder mechanism is provided between the bucket support and the bucket. In such a bucket cart assembly, if only forward discharge is desired, both of the pair of pivot pins are used, and the bucket cart is connected to and supported by the bucket support by both of the pair of pivot pins. If discharge in the opposite direction is desired, the right or left pivot pin of the pair of pivot pins is removed;
The bucket cart is connected to and supported by the bucket support only by the left or right pivot pin. In such a state, when the hydraulic cylinder mechanism is extended, the bucket is pivoted about the left or right pivot pin to a left or right ejection position, and when the hydraulic cylinder is retracted, The bucket is returned to its original working or loading position.

The bucket assembly as described above is capable of discharging not only forwardly but also to the left or right side as required, and therefore can be conveniently used in a wide range of work sites, but has the following drawbacks: There are some problems. That is, when discharging to the left or right side is enabled, the right or left pivot pin is removed as described above, and the bucket is connected to and supported by the bucket support only by the left or right pivot pin. In this state, work such as excavation and loading is carried out. Therefore, the support of the bucket to the bucket support is not reliable and sufficient safety is not ensured, and the load applied to the bucket during operation is concentrated on the left or right pivot pin and related components. Large local stresses act not only on the bucket assembly but also on the lift arm of the earthmoving vehicle, significantly affecting their durability.

In addition to solving the above-mentioned drawbacks and problems, the bucket can be reliably supported by the bucket supports on both sides during excavation or loading work without using a complicated mechanism, and can provide sufficient safety. In Japanese Patent Application No. 55-108344 filed by the present applicant, one end of the fluid pressure cylinder mechanism is provided in two receiving parts provided on both sides of the upper back of the bucket as a bucket assembly with guaranteed durability. It is rotatably connected to one end, and the other end is connected to a rotating member rotatably attached to the bucket support, and penetrates into the hole of the bucket via the rotating member and the link member connected to this. A bucket cart assembly has been proposed in which a bucket cart is fixedly supported on a bucket support by a connecting pin.

On the other hand, the bucket linkage system for earthmoving vehicles uses a so-called 8-bar linkage, in which a pair of tilt links are positioned at approximately the same distance in the lateral direction in correspondence with a pair of lift arms positioned at an interval in the lateral direction. There is also a so-called Z-bar linkage in which one (or two) tilt links are positioned between a pair of lift arms in the lateral direction, but it is not possible to use fluid pressure as in the bucket assembly of Japanese Patent Application No. 108344/1983. A structure in which the cylinder mechanism is disposed laterally is not suitable for a Z-bar linkage type earthmoving vehicle. For the Z bar linkage,
When the bucket is tilted back, the tilt link and the back of the bucket are close to each other, so in order to install the hydraulic cylinder mechanism laterally, the bucket main body must be installed with a space in front of the tilt link mechanism. However, doing so will impair the digging power of the bucket or the digging power of the vehicle.

In addition, regardless of the type of bucket linkage, in a structure in which the hydraulic cylinder mechanism is arranged laterally, it is supported at the opposite end of the bucket main body, which is the center of rotation, at the pivot pin when discharging to the side. If a force is applied to the side that is not open, a large force will be applied locally not only to the bucket main body but also to the fluid pressure cylinder mechanism and its supporting parts, so sufficient consideration must be given to the durability of these parts.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to eliminate the need to dispose a fluid pressure cylinder mechanism in the lateral direction, making it suitable for vehicles with a Z-bar linkage, and, moreover, eliminating the need for packets during work. The object of the present invention is to provide a bucket assembly that is securely supported by a bucket support.

According to the present invention, in order to achieve the above object, there is provided a side panel comprising a bucket belt, a bucket support, and a fluid pressure cylinder mechanism interposed between the bucket belt and the bucket support. In a bucket assembly for an earthmoving vehicle, which is also capable of discharging in the opposite direction, the bucket includes a bucket main body, a receiving part provided at the upper rear side of the bucket main body, and a receiving part installed on both sides of the lower rear side of the bucket main body. first and second pivot pins that respectively serve as centers of rotation of the bucket body when discharging the bucket to the
The bucket support receives from above a support body attached to a lift arm and a tilt link of an earthmoving vehicle, and each of the first and second supported parts of the bucket. first and second supporting parts provided on the support body for supporting the bucket, and engaging with the first and second supported parts of the bucket bag, respectively, to provide the first and second supporting parts; and a non-operating position in which the bucket is detached from each of the first and second supported parts. first and second hook members, a pivoting member rotatably attached to the support body, first and second stop surfaces that limit the pivoting of the pivoting member to a predetermined range; a transmission member connected to the first hook member or the second hook member, the other end of which is selectively connected to the first hook member or the second hook member, and one of the cylinder and the rod of the hydraulic cylinder mechanism is connected to the receiver of the bucket. There is provided a bucket assembly characterized in that the cylinder and the rod of the hydraulic cylinder mechanism are pivotally connected to the pivot member.

BRIEF DESCRIPTION OF THE DRAWINGS Preferred embodiments of the bucket bag assembly of the present invention will now be described in more detail with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, the illustrated bucket assembly includes a bucket 2, a bucket support 4, and a fluid pressure interposed between the bucket 2 and the bucket support 4. It is composed of a cylinder mechanism 6.

The bucket 2 is equipped with a bucket main body 8 that is suitable for excavation, loading, etc., and may have an appropriate shape suitable for discharging to the front and both sides. A receiving portion 10 to which the fluid pressure cylinder mechanism 6 is connected is provided at the upper rear surface of the bucket main body 8, as will be explained later.

In addition, on both sides of the lower back of the bucket main body 8,
A first supported part 12a and a second supported part 12b are provided. As shown in FIGS. 2 and 4, at least one first supported portion 12a (in the illustrated case, in the longitudinal direction (2) spaced apart first pivot pins 1
It has 4a. Such a first pivot pin 14a
As will be explained later, this is the center of rotation when the bucket main body 8 is rotated to the right side discharge position, and is arranged so as to extend in a direction substantially perpendicular to the width direction of the bucket main body 8. . A suitable bearing member 1 is attached to the first pivot pin 14a.
It is preferable that the first roller 18a is rotatably fitted through the roller 6a.

On the other hand, the second supported part 12b has substantially the same configuration as the first supported part 12a, and is fixed at a predetermined position on the lower left end of the back surface of the bucket main body 8 to eject the bucket main body 8 to the left side. It has at least one second pivot pin 14b (in the illustrated case, two pivot pins spaced apart in the longitudinal direction) that form a center of rotation when pivoted to a certain position. Preferably, a second roller 18b is fitted onto the second pivot pin 14b via a suitable bearing member 16b.

Next, the bucket support 4 is attached to the support body 20.
It is equipped with This support main body 20 has portions 24a and 24b of a support hinge plate 22 provided on the main body rotatably connected to the tips of a pair of lift arms (not shown) of an earthmoving vehicle, and a mounting bracket to be described later. The section 26 is pivotally connected to the tip of a single tilt link (not shown) of the earthmoving vehicle and is thus attached to the earthmoving vehicle.

The support body 20 includes a first support part 26a and a second support part 26a for receiving and supporting the first supported part 12a and the second supported part 12b provided on the bucket 2 from above, respectively. Support part 26b of
is provided. As can be easily understood from FIGS. 1 to 5, especially FIGS. 2 and 4, each of the first support portion 26a and the second support portion 26b is
Shaft member 2 fixed to both sides of support body 20
8, and includes a pair of support pieces 30 each having a substantially semicircular support surface that is open upward and receives and supports the first roller 18a (or second roller 18b) from above.

The support body 20 further includes the first supported portion 12a and the second supported portion provided on the bucket bag 2 adjacent to the first supporting portion 26a and the second supporting portion 26b, respectively. A first hook member 32a and a second hook member 32b are mounted so as to be pivotable between an active position in which they engage with each of the support portions 12b and a non-operative position in which they separate therefrom. In the specific example shown, as can be easily understood from FIGS. 2 and 4 in particular, each of the shaft members 28 fixed to both sides of the support body 20 is connected to each other via appropriate bearing members 33. First hook member 3
2a and a second hook member 32b are rotatably mounted. When each of the first hook member 32a and the second hook member 32b is in the operating position shown in FIGS. Roller 18a
and the second roller 18b of the second supported portion 12b, and separates from them when the second hook member 32b is brought to the non-operating position illustrated in FIG. have Furthermore, each of the first hook member 32a and the second hook member 32b has a connecting protrusion 36 to which a transmission member to be mentioned later is connected.

The bucket support 4 further includes a rotating member 38 that is rotatably attached to the support body 20, and a first stopping surface 40a and a second stopping surface 40b that limit the turning of the rotating member 38 to a predetermined range. is provided. In the illustrated example, a mounting bracket 42 is fixed to the center of the upper part of the support body 20, and a center portion of the first rotating member 38 is rotatable at the lower surface of both ends of the mounting bracket 42. Two inclined surfaces 39 are formed on the lower surfaces of both ends thereof, and the two inclined surfaces 39 abut each of the first and second stop surfaces during turning. The first stop surface 40a is constituted by the surface of an appropriate piece fixed to the support body 20, and the pivot member 38 is
When turned clockwise as shown in the figure,
It comes into contact with the lower right end of it to limit its turning. Similarly, a second stop surface 40b, consisting of a surface of a suitable piece fixed to the support body 20, is provided when the pivot member 38 is pivoted counterclockwise in FIG. (which occurs when the rotating member 38 is rotated to the left ejection position), the rotating member 38 comes into contact with the lower left end of the rotating member 38 to restrict its rotation.

A connecting protrusion 44 projects downward from the center of the pivoting member 38 attached to the mounting bracket 42. As shown in FIG. This connecting protrusion 44,
A transmission member 46 is connected to one of the first and second hook members (second hook member 32b in the illustrated case). More specifically, the transmission member 46 is composed of an elongated rod having male threads at both ends, one end of which is screwed into a connecting piece 48, and is connected to the connecting protrusion 44 of the pivoting member 38 via this connecting piece 48. The other end is screwed into a connecting protrusion 49, and via this connecting protrusion 49, it is rotatably connected to the connecting protrusion 36 of the first or second hook member.

Further, the connecting protrusion 36 of the first or second hook member (the first hook member 32a in the illustrated case) to which the other end of the transmission member 46 is not connected is provided with a connecting protrusion 36 that is threadedly engaged with both ends of the transmission member 46. Connecting pieces 48 and 49
A connecting piece 50 similar to the above is connected, but this connecting piece 50 has an appropriate bolt 5 screwed therein.
It is detachably fixed to the support body 20 at 2.

Next, the hydraulic cylinder mechanism 6 in the illustrated embodiment is a single rod type having a cylinder 54 and a single rod 56 that is slidable relative to the cylinder 54 and projects from one end of the cylinder 54. things are used. And Rod 56
The leading end of the cylinder 54 is rotatably connected to the receiving portion provided on the upper back surface of the bucket main body 8, while the so-called bed end side of the cylinder 54 has its center connected to the rotating member 38 mounted on the support main body 20. Either the left or right end (in the case shown, the right end)
It is rotatably connected to. That is, as shown in FIG.
The bed ends of the buckets 4 and 4 are connected slightly to the right, but the tips of the rods 56 are connected to the upper center of the bucket main body 8, and are arranged in the vertical direction as a whole. Therefore, when the hydraulic cylinder mechanism 6 extends, the cylinder 54 first moves the pivoting member 38 clockwise as shown in FIG.
It is rotated until the inclined surface at the lower right end abuts on the first stop surface 40a. As a result, the second hook member 32b is rotated counterclockwise via the transmission member 46, detached from the second supported portion 12b of the bucket main body 8, and released from the lock.

Next, the effects of the above-mentioned bucket bag assembly constructed according to the present invention will be explained.

It should be noted that the illustrated bucket assembly is set to a state where right-side discharge is possible (setting to a state where left-side discharge is possible will be discussed later).

During several operations such as digging, loading, etc., or when performing forward discharge, the bucket assembly is maintained in the condition shown in FIGS. 1 and 2. In such a state, the first and second supported parts 12a and 12 provided on the bucket 2
b are received and supported by first and second support portions 26a and 26b provided on bucket support 4, respectively. In addition, the first and second hook members 32a and 32b provided on the bucket support 4 are in the active position, respectively.
The first and second supported parts 12a and 12b provided on the bucket 2 are engaged with each other.
More specifically, the first and second hook members 32a
and 32b are engaged with the first roller 18a of the first supported part 12a and the second roller 18b of the second supported part 12b, respectively. Thus, the bucket 2 is connected to the bucket support 4 on both sides thereof and is securely supported by the bucket support 4.

When the earth and sand loaded in the bucket 2 are to be discharged to the right side, the hydraulic cylinder mechanism 6 is expanded by the action of an appropriate hydraulic circuit (not shown). In this way, first, the pivoting member 38 provided on the bucket support 4 is pivoted clockwise from the position shown in FIGS. 1 and 2. Such a pivoting movement of the pivoting member 38 is limited by the abutment of its right-hand inclined surface 39 against the first stop surface 40a, so that the pivoting member 38 is pivoted to the position shown in FIG. Such a pivoting movement of the pivoting member 38 is transmitted to the second hook member 32 via a transmission member 46.
b, and the second hook member 32b is brought to the non-operating position shown in FIG. is caused to separate from the roller 18b of the second supported portion 12b).

When the hydraulic cylinder mechanism 6 is further extended, the pivoting member 38 is restricted from pivoting by the first stop surface 40a and the second hook member 32b
Since the bucket 2 is separated from the second supported part 12b, the bucket 2 is pivoted clockwise in FIG. 5 about the first pivot pin 14a of the first supported part 12a, and as shown in FIG. It is placed in the right ejection position as shown. Thus, Bucket 2
The earth and sand inside will be discharged to the right side.

When the discharge of the earth and sand is completed, the fluid pressure cylinder mechanism 6 is contracted. As a result, the bucket 2, which is initially in the right-side discharge position, is rotated counterclockwise around the first pivot pin 14a of the first supported part 12a, and returned to the original position shown in FIG. . When the fluid pressure cylinder mechanism 6 is further contracted, the pivoting member 38 in the position where it contacts the first stop surface 40a is pivoted counterclockwise in FIG.
It is returned to the position shown in the figure. Such a turning movement of the turning member 38 is transmitted to the second hook member 32b via the transmission member 46, and the second hook member 32b
b is returned to the working position shown in FIGS. 1 and 2;
The second hook member 32b is thus reengaged with the second supported portion 12b. (More specifically, the hook piece 34 of the second hook member 32a is reengaged with the second roller 18b of the second supported portion 12b).

In the states shown in FIGS. 1 to 5, the bucket cart assembly is set in a state in which the bucket cart 2 can be moved to the right side discharge position, but it is not possible to move the bucket cart 2 to the left side discharge position. To enable it, perform the following operations.

(1) The other end of the transmission member 46 and the second hook member 32
b (that is, the threaded connection between the other end of the transmission member 46 and the connecting protrusion 36 of the second hook member 32b is released), while the first hook member 3
2a (that is, remove the fixing bolt 52 from the connecting protrusion 36 of the first hook member 32a).

(2) The other end of the transmission member 46 is connected to the first hook member 32a (that is, the other end of the transmission member 46 is screwed into the connecting protrusion 36 of the first hook member 32a), while the second hook The member 32b is fixed (that is, the fixing bolt 52 is screwed into the connecting protrusion 36 of the second hook member 32b and fixed to the support body 20).

(3) Disconnect the fluid pressure cylinder mechanism 6 from the right end of the swing member 38, and connect the fluid pressure cylinder mechanism 6 to the left end of the swing member 38 so that it can rotate freely.

By carrying out the operations (1) to (3) above, the bucket cart assembly is in a state where the bucket cart 2 can be moved to the left side discharge position. The operation and effect of the bucket cart assembly in this case are substantially the same as in the case where the bucket cart 2 can be moved to the right side discharge position.

[Brief explanation of the drawing]

FIG. 1 is a rear view of an embodiment of a bucket bag assembly according to the present invention. FIG. 2 is a simplified rear view showing the main parts of the bucket bag assembly according to the present invention. 3 is a side view of the bucket bag assembly shown in FIG. 1; FIG.
FIG. 4 is a partial cross-sectional view showing details of the supported part, the support part, and the hook member in the bucket bag assembly shown in FIG. 1. FIG. 5 is a simplified rear view showing a state in which the fluid pressure cylinder mechanism begins to extend and the pivoting member contacts the stop surface. FIG. 6 is a simplified rear view showing the bucket in the right side discharge position. 2...bucket, 4...bucket support, 6
...Fluid pressure cylinder mechanism, 8...Bucket main body,
10... Receiving part of bucket main body, 12a and 12b
...first and second supported parts, 14a and 14b
...first and second pivot pins, 18a and 1
8b...first and second rollers, 20...support main body, 26a and 26b...first and second support parts, 32a and 32b...first and second hook members, 38...swivel member , 40a and 40b...
...first and second stop surfaces, 46...transmission member, 5
4... cylinder, 56... rod.

Claims (1)

[Claims] 1. An earthmoving vehicle that is also capable of discharging to the side, and is composed of a bucket cart, a bucket support, and a fluid pressure cylinder mechanism interposed between the bucket cart and the bucket support. In the bucket assembly, the bucket includes a bucket main body, a receiving part provided on the upper rear side of the bucket main body, and a receiving part provided at the lower back side of the bucket main body, each of which is attached to the bottom side of the bucket main body when discharging to the side. The bucket support includes a support body attached to a lift arm and a tilt link of an earthmoving vehicle, and a support body that is attached to a lift arm and a tilt link of an earthmoving vehicle, and a support body that is attached to a lift arm and a tilt link of an earthmoving vehicle. first and second support parts provided in the support body for receiving and supporting each of the first and second supported parts from above;
an operating position in which the bucket tot engages with each of the first and second supported parts to hold the first and second supported parts to the first and second support parts, respectively; A first member mounted so as to be pivotable between a non-operating position and a non-working position where the first member separates from each of the first and second supported parts.
and a second hook member, a pivoting member rotatably attached to the support body, first and second stop surfaces that limit the pivoting of the pivoting member to a predetermined range, and one end is attached to the pivoting member. and a transmission member whose other end is selectively connected to the first hook member or the second hook member, and one of the cylinder and the rod of the hydraulic cylinder mechanism is connected to the receiving portion of the bucket. Rotatably connected,
A bucket bag assembly characterized in that the other of the cylinder and the rod of the hydraulic cylinder mechanism is pivotally connected to the pivoting member. 2. Claim 1, characterized in that the pivoting member is rotatably mounted at its central portion, and has inclined surfaces on the lower surfaces of both ends thereof that abut each of the first and second stop surfaces. Bucket assembly as described. 3. Each of the first and second supported parts of the bucket cart has first and second rollers rotatably fitted on each of the first and second pivot pins, and 3. A bucket bag assembly as claimed in claim 1 or 2, wherein the first and second hook members of the support engage the first and second rollers, respectively, in the operative position.