JP2809260B2 - Connector for construction work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction vehicle having a working boom, such as a hydraulic shovel, for easily and quickly attaching or detaching various working attachments such as crushers and buckets to and from a boom tip. The present invention relates to a connection tool for a construction work machine that can be used.

[0002]

2. Description of the Related Art Hitherto, a connecting tool has been used for attaching or detaching various work attachments such as a crusher, a bucket, etc. to a boom tip of a construction vehicle having a work boom such as a hydraulic shovel. ing.

[0003] The main structure of the connecting device is composed of two members: a boom-side connecting device that is mounted on the front end side of the construction boom, and an attachment-side connecting device that is mounted on an attachment side such as a bucket or a crusher. The boom-side connector and the attachment-side connector comprise a shaft and a movable hook-shaped claw that engages with the shaft,
The operation of the boom causes the pawl to appropriately move and engage with the shaft.

Many of the claws are movable by a hydraulic cylinder or a spring. In particular, the hydraulic cylinder is interlocked with the boom side.

[0005]

SUMMARY OF THE INVENTION Many of the above couplers are
A claw is formed on one of the boom-side connection tool and the attachment-side connection tool, and a shaft is provided on the other, and the claw is locked on a shaft on the other side. It is extremely difficult to check from the driver's seat of the construction vehicle to confirm whether the side connection tool and the attachment side connection tool are securely connected, and an operator is required to check. Become.

Further, as described above, in the locking by the movable claw and the shaft, the locking state tends to be extremely loose, and therefore, it is extremely weak against vibrations and impacts, and the attachment may not work during work. There is also a danger of falling off the boom.

[0007] Further, there is a type in which the above-mentioned claw is moved by a hydraulic mechanism. In this case, a strong connection by hydraulic pressure is certainly possible, but the whole apparatus becomes complicated,
Therefore, not only is it extremely expensive, but also there is an inconvenience in that when the hydraulic mechanism fails, it cannot be repaired immediately.

[0008]

Means for Solving the Problems Therefore, the inventor has conducted intensive studies to solve the above-mentioned problems, and as a result, the present invention
A locking rod urged by an elastic body, and a main connecting body provided with unlocking means connecting an axial rear portion of the locking rod to an unlocking hydraulic rod movable in the axial direction of the locking rod; A connecting member for a construction work machine comprising a body to be connected, wherein a tip of a locking rod protrudes toward the body to be connected B and penetrates and elastically couples in contact with the main body and the body to be connected. Thereby, various work attachments such as a crusher and a bucket can be easily and quickly attached to or detached from the end of a boom of a construction vehicle having a work boom such as a hydraulic shovel, and the attached state can be changed. It can be made extremely strong, and has solved the above-mentioned problems.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The present invention comprises a main body A and a body B to be connected, and the main body A is a shovel or the like. The connected object B is mounted on the attachment a side of a digging bucket, a crusher, etc., and the connection between the boom b and the attachment a is connected to the main connected body A with the main connected body A. This is performed through the connection body B.

[0010] As shown in FIG.
A locking rod A1 is mounted on one side of the main board 1,
On the other side, a main mounting portion 14 to be mounted on the tip of the boom b of the construction vehicle is formed.

The locking rod A1 is shown in FIGS.
As shown in FIG. 2, the lock head 2 includes a cylindrical lock head 2, a cylindrical stop flange 3 having a larger diameter than the lock head 2, and a guide cylinder 4 having a smaller diameter than the stop flange 3. ing.

The locking rod A1 has an axial direction of the main substrate 1.
The guide rod 6 is supported by a guide body 6 so as to be slidable in the axial direction substantially in parallel with the surface of the lock rod A. A guide through hole 6a is formed in the guide body 6, and the guide rod 6 guides the lock rod A1. The tube part 4 is slidably inserted.

The locking rod A1 is configured to be capable of reciprocating in the axial direction by the support of the guide body 6, and the outer periphery of the guide cylindrical portion 4 of the locking rod A1 is shown in FIGS. As shown in FIG. 5, an elastic body 7 such as a coil spring is provided, one end of the elastic body 7 in the longitudinal direction abuts the guide body 6 and the other end abuts on the stop flange 3. It is always pressed by the elastic force of the elastic body 7.

The guide body 6 has a locking arm 8 pivotally supported by a pin or the like so as to be freely rotatable, and this pivot point is referred to as a pivot point 8p. As shown in FIGS. 1, 5 and the like, the locking arm 8 has a notch-shaped locking concave portion 8a formed at the end in the longitudinal direction, and the locking concave portion 8a is formed with a locking rod A1. The locking rod A is locked to the locked portion 5 provided on the
1 is stopped at a predetermined position against the elastic force of the elastic body 7.

The engaging arm 8 has an abutting portion 8b formed at an appropriate position in the longitudinal direction thereof, and the abutting portion 8b is pressed from the outside, whereby the engaging arm 8b is pressed. 8 rotates around the pivot point 8p, disengages from the locked portion 5 of the locking rod A1, moves in the axial direction by the elastic force of the elastic body 7, and is connected to the connected body B. .

As shown in FIG. 1 and the like, the contacted portion 8b
Protrusions are formed from appropriate locations of the locking arm 8 so that a release push-up portion 17 of the connected body B, which will be described later, contacts and presses.

The locking arm 8 is provided with a locking spring 9 between the main board 1 and the main board 1, as shown in FIGS. The locking recess 8a of the arm 8 is always urged so as to be able to lock the locked portion 5 of the locking rod A1 in a pressed state.

As shown in FIG. 2, the device provided on the main substrate 1 such as the above-mentioned locking rod A1 is covered and protected by a cover A3. Specifically, the cover A3 is a cubic box. A casing 10 formed in a shape is formed on the main substrate 1 so as to cover the locking rod A1 and the like, and the casing 10 has a casing 10 as shown in FIGS. Thus, the lock head guide through-hole 11 is formed so that the lock head 2 is slidable.

Further, as shown in FIG. 1 and the like, a locking connecting plate 16 of a connected body B, which will be described later, is freely inserted into the side wall plate of the housing 10 where the lock head guide through-hole 11 is formed. The flat insertion groove 12 is formed.

A release through-hole 13 is formed on the top plate of the housing 10, and the contacting portion 8b of the locking arm 8 is located at a position corresponding to the location where the release through-hole 13 is formed. The release push-up portion 17 of the connected body B is inserted through the release through-hole 13 so that the contact portion 8 of the locking arm 8 is
b can be pressed.

As described above, the main mounting portion 14 is provided on the main board 1 of the main connector A.
As shown in FIG. 2, the main mounting portion 14 has mounting plates 14 a, 14 a formed at both ends in the width direction of the main substrate 1.
The mounting holes 14b, 14b are formed in the mounting holes 14b, 14b. The mounting shaft is mounted on the end of the boom b by passing the connecting shaft through the mounting holes 14b, 14b. is there.

Next, in the connected object B, a locking connecting plate 16 is formed on one side surface of the slave substrate 15, and the locking head 2 of the locking rod A1 is freely inserted into the locking connecting plate 16. Locking connection hole 16a is formed.

Specifically, when the object B and the main object A are properly connected, the locking connecting plate 16
However, as shown in FIG. 3, when the lock connecting hole 16a is orthogonal to the axial direction of the lock rod A1 and the lock connection hole 16a faces the lock head 2, when the lock rod A1 moves in the axial direction, The lock connecting plate 16 is provided on the sub-board 15 so that the lock head 2 can pass through the lock connecting hole 16a.

The release board 17 is provided on the sub-board 15.
Is formed, and the release push-up portion 17 moves in the direction of the cover 17 of the main connector A, and through the release through hole 19 of the cover 17, the contacted portion 8b of the locking arm 8 Can be pressed.

The sub-mounting portion 18 is formed on the sub-substrate 15. More specifically, as shown in FIG. Are formed in the auxiliary mounting plates 18a, 18a.
b and 18b are formed, and the connecting shaft is attached to the attachment
b, 18b and attached to the attachment a.

An engaging body A4 is provided on the main connecting body A and the connected body B. One embodiment of the engaging body A4 is composed of a connecting shaft 19 and a hook 20. One of the body A and the connected body B is provided with a connecting shaft 19, and the other is provided with a hook 20 which is engageable with the connecting shaft 19 and has an insertion opening 20a. Things.

In the embodiment shown in FIGS. 1 and 2, a connecting shaft 19 is provided on the main connecting member A side, and a hook 20 is connected to the connected member B.
The connecting shaft 19 has a large diameter and is installed on the same surface of the main board 1 where the locking rods A1 and the like are provided.
In FIGS. 1 and 21, they are provided at appropriate intervals from the surface of the main substrate 1.

Next, the unlocking means A2 is connected to the main connector A
An unlocking hydraulic cylinder 22 provided therein is provided, and the guide cylinder portion 4 of the locking rod A1 and an unlocking hydraulic rod 22a of the unlocking hydraulic cylinder 22 are connected in the axial direction.

The hydraulic cylinder 22 for unlocking is operated by a hydraulic unit 23. The hydraulic unit 23 is integrally formed with a power source of a construction work vehicle. Examples of the hydraulic unit 23 include: As shown in FIG. 9, it is composed of a pump and a valve.

A piston 22b is formed on the release hydraulic rod 22a, and the oil is fed into the lock release hydraulic cylinder 22 from the release hydraulic rod 22a side.
When the piston 22b is pushed, the release hydraulic rod 22a moves rearward, and the guide cylinder portion 4 of the locking rod A1 connected to the release hydraulic rod 22a also moves axially rearward to lock the lock rod A1. The state can be released.

Further, on the main board 1 of the main connector A, FIG.
As shown in FIG. 0, there is also an embodiment in which a hydraulic pump 24 is mounted, and the unlocking hydraulic cylinder 2 in the cover A3 is provided.
2 can be activated.

In the above embodiment, the stop valve 23a in the hydraulic unit 23 is closed and the lever 2 of the hydraulic pump 24 is closed.
By operating 4a, oil is fed into the unlocking hydraulic cylinder 22 from the unlocking hydraulic rod 22a side (see FIG. 11).

With respect to the operation of the connecting device for construction work machines of the present invention, first, the main connecting member A is mounted on the end of the construction vehicle at the boom b side, and the connected object B is connected to the attachment a of a shovel, a crusher or the like. Attach to At this time, in the main connector A,
As shown in FIG. 1, the locking rod A1 is fixed to the unlocking position by the locking arm 8, and the oil in the unlocking hydraulic cylinder 22 is completely removed via the hydraulic unit 23. And the release hydraulic rod 22a of the lock release hydraulic cylinder 22 can be moved only by the elastic force of the elastic body 7.

Next, as shown in FIG. 4 (a), the attachment a side is fixed to the ground, and the boom b is operated from the cab of the construction vehicle to attach the hooks 20, 20 of the main connector A to the attachment. a of the connecting member B is guided to the 19 connecting shafts of the body B to be connected, and the connecting shaft 1 is inserted through the insertion opening portion 20a of the hook 20.
Insert 9

Next, as shown in FIG. 5, the boom b is operated to move the main connecting member A around the connecting shaft 19 until the main connecting member A becomes substantially parallel to the connected object B. When the main connector A continues to rotate and comes into contact with the object B substantially in parallel, the locking connecting plate 16 of the object B fits into the flat insertion groove 12 of the main object A, and The lock connection hole 16a and the lock head 2 face each other, and the lock head 2 is
6a.

At about the same time, as shown in FIG.
6 is inserted into the release through-hole 19 formed in the lock 6, and the release push-up portion 17 hits the contacted portion 8 b of the locking arm 8,
When the locking arm 8 is removed from the locked portion 5 of the locking rod A1 and the locking rod A1 is released, the locking rod A1 moves in the axial direction by the elastic force of the elastic body 7, The lock head 2 is inserted into the lock connection hole 16a, and the connection operation between the main connection body A and the connection target body B is completed.

Next, the connected main body A and the connected body B
The hydraulic unit 23 of the unlocking means A2 is started, oil is fed into the hydraulic cylinder 22 for unlocking, and the hydraulic rod 2 for unlocking is released as shown in FIG.
By moving 2a in the unlocking direction, the locking rod A1 also moves in the unlocking direction.

The locking rod A1 is pushed back to the unlocked position, and as shown in FIG. 8, the locking head 2 is disengaged from the locking connecting hole 16a and the locking arm 8 is positioned at the locking recess 8a. The locked portion 5 of the locking rod A1 reaches, the locking recess 8a and the locked portion 5 are locked, and the locking rod A1 is fixed at the unlocked position.
The separation of the main linked body A and the linked body B is completed.

As described above, the main connector A is mounted on the end of the boom b, and the connected member B is mounted on the attachment a side in many cases. However, the present invention is not necessarily limited to this embodiment. The main connected body A may be mounted on the attachment a, and the connected body B may be mounted on the tip of the boom b.

The main connected body A and the connected body B are the same as those shown in FIG.
As shown in (b), the tip of the boom b and the attachment a may be formed integrally in advance.

Further, although two locking rods A1 are often provided on the main connecting member A, there is an embodiment in which one locking rod A1 is provided (see FIG. 12).

[0042]

According to the present invention, the locking rod A1 urged by the elastic body 7 and the axial rear portion of the locking rod A1 are moved to the releasing hydraulic rod 22a which is movable in the axial direction of the locking rod A1. The main connecting body A provided with the unlocking means A2 connected and the connected body B, and the tip of the locking rod A1 is brought into contact with the connected body B by the contact between the main connecting body A and the connected body B. The main connecting member A and the connected member B can be instantaneously connected to each other, and secondly, the lock can be released very easily. Various effects such as being possible are exhibited.

To explain the above effect in detail, the locking rod A1 provided on the main connecting body A is such that when the main connecting body A comes into contact with the connected body B, the locking rod A1 projects toward the connected body B, By penetrating, the connection between the main connected body A and the connected body B can be performed almost instantaneously.

Further, the connecting operation between the main connected body A and the connected object B is performed simply by bringing the main connected body A and the connected object B into contact with each other so that the locking rod A1 projects toward the connected object B side. It is penetrating, and its operation can be extremely simplified, and reliable connection is possible, so that it is not necessary to check the connection state, and it is possible to eliminate the need for workers involved in the connection.

The connecting state is such that the locking rod A1 provided on the main connecting member A projects and penetrates to the connected member B side,
The locking rod A1 is extremely strong against vibration and impact in the horizontal and vertical directions in the axial direction of the locking rod A1. It is extremely strong and durable.

Further, the locking rod A1 has a structure that projects and penetrates to the connected object B side by using an elastic material such as a spring, so that both the main connected object A and the connected object B have a boom b. It can be attached to the tip, which is similar to a lock device equipped with a hydraulic mechanism, which is attached to the boom b side and compared with a conventional type of coupling tool which must be connected to the hydraulic mechanism of the construction work vehicle. There is an advantage that the mounting means can be significantly simplified.

Next, since the locking rod A1 is urged by the elastic body 7, when the locking rod A1 is once locked with respect to the locking rod A1, a pressing force due to the urging of the elastic body 7 is applied. Therefore, an extremely strong locked state can be maintained until the lock is released.

Next, when releasing the lock state of the lock rod A1, the release hydraulic rod 22a of the lock release hydraulic cylinder 22 is connected to the rear of the lock rod A1 along the axial direction. Hydraulic cylinder 22
By letting the oil flow in, the release hydraulic rod 22a moves, and the movement is made in the opposite direction to the locking direction of the locking rod A1, whereby the locked state can be released very easily.

[0049]

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main connected body and a connected body.

FIG. 2 is a perspective view of a state where a main connected body and a connected body are separated.

FIG. 3 is a vertical sectional view of the present invention.

4A is a schematic view showing a state in which an attachment is attached to the tip of a boom b. FIG. 4B is a schematic view in which a connected body is provided integrally with the attachment.

FIG. 5 is a longitudinal sectional side view showing a state in which a main connected body and a connected body are engaged at one end in the front-rear direction.

FIG. 6 is a vertical cross-sectional side view showing a state where locking between the main connected body and the connected body is completed.

FIG. 7 is a sectional view of a main part showing a state in which a lock rod is released.

FIG. 8 is a sectional view of a main part showing a state in which the release of the locking rod is completed.

FIG. 9 is a hydraulic circuit diagram of an embodiment according to the present invention.

FIG. 10 is a longitudinal sectional side view of an embodiment in which a hydraulic device is provided in a main coupling body.

FIG. 11 is a hydraulic circuit diagram of another embodiment of the present invention.

FIG. 12 is a longitudinal sectional plan view of an embodiment in which a lock rod is used as one unit in the present invention.

[Explanation of symbols]

 A: Main linked body A1: Locking rod 7: Elastic body A2: Lock release means 22a: Release hydraulic rod B: Connected body

Continued on the front page (72) Inventor Kunihiko Matsui 314 Chikusa-cho, Hanamigawa-ku, Chiba-shi Inside Sakado Works (72) Inventor Isamu Nagayoshi 314 Chikusa-cho, Hanamigawa-ku, Chiba-shi Sakado Works (72) Invention Toshiyuki Kuno 314 Chikusa-cho, Hanamigawa-ku, Chiba-shi Inside the Sakado Works, Ltd. (72) Inventor Masayuki Asai 314 Chikusa-cho, Hanamigawa-ku, Chiba-shi Inside the Sakado Works, Ltd. (72) Inventor Toshifumi Toshima Chiba, Chiba-shi 314, Machi In the Sakado Works, Ltd. (56) References Japanese Utility Model Showa 60-96374 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E02F 3/40

Claims (1)

(57) [Claims] A lock rod urged by an elastic body and unlocking means connected to a release hydraulic rod which is axially movable in the axial direction of the lock rod are provided. A construction comprising a main connected body and a connected body, wherein a tip of a locking rod protrudes toward the connected body side and is elastically connected through contact with the main connected body and the connected body. Work machine coupling.