JP2809259B2 - 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]

The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have made the present invention bendable and extendable in a substantially rectangular shape, and provided the elastic body with a stretchable state. A lock body provided with a urged bending portion; a lock release means provided with a pressing rocking member movable and pressable in the bending direction of the bending portion, wherein the pressing rocking member is movable by the axial movement of the pressing screw rod; For a construction work machine, comprising a main connecting body provided with a connecting body and a connected body, wherein a tip end of the lock body protrudes toward the connected body side and is elastically connected through contact with the main connecting body and the connected body. By using the connecting tool, various work attachments such as a crusher and a bucket can be easily and quickly attached to or detached from a boom tip of a construction vehicle having a work boom such as a hydraulic shovel, And its mounting condition is extremely strong It can be those, which solves the above 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 lock body A1 and a lock release means A2 are provided on one side of the main board 1.
On the other side, a main mounting portion 18 is formed to be mounted on the tip of the boom b of the construction vehicle.

As shown in FIGS. 3 and 4, the lock body A1 mainly comprises a cylindrical lock head 2 and a bending / extending portion 4, and the locking head 2 and the bending / extending portion 4 are connected to each other on the lock side. The bending portion 4 is pivotally connected to the main substrate 1 by a fixed connecting portion 5.

The bending / extending portion 4 comprises a swing link 4a and a connecting link 4b. The swing link 4a and the connecting link 4b are pivotally connected to each other by a pin or the like so as to be rotatable. Are rotatably connected to the lock head 2 at the lock side connecting portion 3, and the swing link 4 a is rotatably connected to the main substrate 1 at the fixed side connecting portion 5, and the bending of the bending portion 4 is swung. The link head 4 has a structure in which the lock head 2 can reciprocate in the axial direction by bending and extending operations of the link 4a and the link 4b.

The lock body A1 is, as shown in FIG.
The axial direction is substantially parallel to the surface of the main substrate 1 and is slidable in the axial direction.
Is provided.

The bending portion 4 is provided with an elastic member 7. Specifically, a coil spring is used as the elastic member 7. In the embodiment shown in FIG. 3 or 5, the elastic member 7 is attached to the swing link 4a. Although provided, the elastic body 7 may be provided on the connecting link 4b side.

As shown in FIG. 3, the bending portion 4 is constantly urged by the elastic body 7 so that the swing link 4a and the connecting link 4b are substantially linear. Even if the dynamic link 4a and the connecting link 4b bend and elongate, they are immediately restored to the elongated state when the external force is removed.

The locked body A1 is provided with a locked portion 6, and as a specific embodiment of the locked portion 6, a shaft-shaped locked portion is provided between the lock-side connecting portions 3 and 3. The locking portion 6 is provided, and the locking arm 8 is locked to the locked portion 6 to maintain the lock body A1 in the unlocked state.

As shown in FIGS. 4, 5 and the like, the locking arm 8 has a notch-shaped locking recess 8a formed at an end in the longitudinal direction, and the locking recess 8a is locked. The lock body A1 is locked to the locked portion 6 provided on the body A1, and the lock body A1 is
Can be stopped at a predetermined position against the elastic force of.

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 6 of the lock body A1, moves in the axial direction by the elastic force of the elastic body 7,
The connection with the connected member B is performed, and the connected portion 8b
Is configured such that a release push-up portion 21 of the connected body B 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 6 of the lock body A1 in a pressed state.

Next, the lock releasing means A2 is mainly composed of a pressing rocking body 10, a pressing screw rod 11 and a screw rod receiver 12, and the pressing rocking body 10 presses the bending / extending portion 4 to perform a bending / extending operation. The pressing oscillating body 10 is provided via a pivoting portion 10a together with a pivoting point between the bending / extending portion 4 and the fixed-side connecting portion 5.

The pressing rocking body 10 is connected to the pivot 10a.
4 and the pressing body 10b are provided between the two frame plates 10d, 10d as shown in FIG.
0b abuts against the swing link 4a of the bending / extending portion 4 and presses to give the bending / extending portion 4 a bending / extending operation.

The pivot portion 10a and the pressing body 10b are formed in a cylindrical shape, and the pivot portion 10a is housed so as to be at the same center as the pivot between the swing link 4a of the bending / extending portion 4 and the fixed side connecting portion 5. The pressing oscillating body 10 pivots about the pivot 10a, and the pressing body 10b also reciprocates on an arc about the pivot 10a.

A pressing screw rod 11 and a screw rod receiver 12 for screwing and supporting the pressing screw rod 11 are provided on the main substrate 1. The screw rod receiver 12 has an inner screw 12a formed therein.
The outer screw shaft portion 11b of the pressing screw rod 11 is screwed into the inner screw 12a, and the pressing screw rod 11 can move in the axial direction with respect to the screw rod receiver 12.

As shown in FIG.
The turning center portions 12b, 12b are formed at both upper and lower ends, and the turning center portion 12b is specifically formed in a cylindrical projection shape. The turning center portions 12b, 12b are turned to predetermined positions of the main connector A. It is movably inserted, and the screw rod receiver 12 is pivotable on the horizontal plane of the main connector A.

The pressing screw rod 11 is connected to the pressing rocking body 10 so as to be rotatable in the circumferential direction of the shaft. As a specific example of the structure, a frame plate 10d of the pressing rocking body 10 is provided. , 10d is provided with a screw rod connecting portion 10c so as to be rotatable.
0c is provided in a spherically shaped connection end portion 11a of the pressing screw rod 11 in a loosely inserted state, and as shown in a sectional view taken along the arrow P-P in FIG. 5, that is, as shown in FIG. 6, the pressing screw rod 11 and the screw rod connecting portion 10c.
It is caulked so that it does not come off.

By rotating the pressing screw rod 11 in a predetermined direction from the outside of the main connecting body A via the operating tool 13, the pressing screw rod 11 moves in the axial direction with respect to the screw rod receiver 12, and
Is connected to the screw rod connecting portion 1 of the pressing rocking body 10.
0c, whereby the pivoting unit 1 is
By turning around 0a, the pressing body 10b comes into contact with the bending and stretching portion 4 and presses to give a bending and stretching operation.

Further, the pressing screw rod 11 moves in the axial direction,
When the turning motion is given to the pressing rocker 10, the screw rod receiver 1
2 also rotates appropriately around the rotation center portions 12b, 12b so that the screw rod receiver 12 can coincide with the axial direction of the pressing screw rod 11.

Lock body A1 and unlocking means A
2, the apparatus provided on the main substrate 1 is covered and protected by a cover A3 as shown in FIG. 2, and specifically, the cover A3 is a casing 14 formed in a cubic box shape. Is formed on the main substrate 1 so as to cover the lock body A1 and the unlocking means A2, and the housing 14 has a lock head 2 as shown in FIGS. A lock head guide through hole 15 is formed so as to be slidable.

Further, as shown in FIG. 1 and the like, a locking connecting plate 20 for a connected member B, which will be described later, is freely inserted into the side wall plate on which the lock head guide through hole 15 of the housing portion 14 is formed. The flat insertion groove 16 is formed.

Further, a release through hole 17 is formed on the top plate of the housing portion 14, and the contacted portion 8 b of the locking arm 8 is located at a position corresponding to the location where the release through hole 17 is formed. The release push-up portion 21 of the connected body B is inserted through the release through-hole 17 and the contact portion 8 of the locking arm 8 is inserted.
b can be pressed.

As described above, the main mounting portion 18 is provided on the main board 1 of the main connecting body A.
As shown in FIG. 2, the main mounting portion 18 has mounting plates 18a, 18a formed at both ends in the width direction of the main substrate 1, and the mounting plate 18
The mounting holes 18b, 18b are formed in the a, 18a, and when mounted on the end of the boom b, the connecting shaft is passed through the mounting holes 18b, 18b and mounted on the end of the boom b. is there.

Next, in the body B to be connected, a lock connecting plate 20 is formed on one side surface of the slave board 19, and the lock head 2 of the lock body A1 can be inserted into the lock connecting plate 20 freely. A lock connection hole 20a is formed.

Specifically, when the connected object B and the main connected object A are properly connected, the locking connecting plate 20
However, as shown in FIG. 3, the lock connecting hole 20a is orthogonal to the axial direction of the lock body A1 and the lock connecting hole 20a faces the lock head 2. When the lock body A1 moves in the axial direction, the lock head In order that the portion 2 can pass through the locking connection hole 20a, the locking connection plate 20 is
9.

As shown in FIG. 2, a release push-up portion 21 is formed on the slave substrate 19, and the release push-up portion 21 is formed.
Moves in the direction of the cover A3 of the main connector A, and the cover A3
As shown in FIG. 10, the abutted portion 8b of the locking arm 8 can be pressed through the through hole 17 for releasing.

The sub-board 19 is formed with a sub-mounting section 22. More specifically, as shown in FIG. Are formed in the auxiliary mounting plates 22a, 22a.
b, 22b are formed, and when mounting to the attachment a, the connecting shaft is
b, 22b and attached to the attachment a.

The main connecting member A and the connected member B are provided with an engaging member A4, and one embodiment of the engaging member A4 includes a connecting shaft 23 and a hook 24. One of the body A and the connected body B is provided with a connecting shaft 23, and the other is provided with a hook 24 which is engageable with the connecting shaft 23 and has an insertion opening 24a. Things.

In the embodiments shown in FIGS. 1 and 2, a connecting shaft 23 is provided on the main connecting member A side, and a hook 24 is attached to the connected member B.
The connecting shaft 23 has a large diameter and is installed on the same surface of the main board 1 on which the lock body A1 and the unlocking means A2 are provided. The support plates 25 are provided at appropriate intervals from the surface of the main substrate 1.

First, the main connecting member A is attached to the end of the construction vehicle on the boom b side, and the connected member 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 lock body A1 is fixed to the unlocked position by the locking arm 8.

Next, as shown in FIG. 8 (a), the attachment a side is fixed on the ground, and the boom b is operated from the cab of the construction vehicle, so that the hook 24 of the main connector A is attached to the attachment a. It is guided to 23 connecting rods of the connected object B,
The connecting shaft 23 is inserted from the insertion opening 24 a of the hook 24.

Next, as shown in FIG. 9, the boom b is operated to move the main connecting member A around the connecting shaft 23 until the main connecting member A is 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 20 of the object B fits into the flat insertion groove 16 of the main object A, and The lock connection hole 20a and the lock head 2 face each other, and the lock head 2 is
0a can be inserted.

At about the same time, the release push-up portion 21 on the side of the connected body B is inserted into the release through hole 17 formed in the cover A3 of the main connected body A as shown in FIG. When the push-up portion 21 comes into contact with the contacted portion 8b of the locking arm 8, the locking arm 8 is removed from the locked portion 6 of the lock body A1, and the fixing of the lock body A1 is released. Are extended linearly by the elastic force of the elastic body 7, the lock head 2 is inserted into the lock connecting hole 20a, and the main connected body A and the connected body B
The connection work with is completed.

Next, the connected main body A and the connected body B
The attachment a is placed on the ground in a stable state, and the pressing screw rod 11 of the unlocking means A2 is separated.
Is rotated from the outside of the main connector A via the operating tool 13,
By pressing the bending / extending portion 4 with the pressing rockers 10 and 10 and bending / extending the bending / extending portion 4, the lock head 2 is removed from the locking connection hole 20 a, and the locking head 6 is engaged with the locked portion 6 of the lock body A 1. The locking arm 8 is locked to secure the unlocked state.

In order to connect the main connecting member A to the connected member B again, the pressing screw rod 11 is rotated via the operating tool 13 to separate the pressing member 10b of the pressing rocking member 10 from the bending / extending portion 4. Move to the position

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 linked body A and the linked body B are shown in FIG.
As shown in (b), the tip of the boom b and the attachment a may be formed integrally in advance.

Further, the lock body A 1 is often provided with two lock heads 2, 2.
In some embodiments, one lock head 2 is provided (see FIG. 11).

[0047]

According to the present invention, there is provided a lock body A1 provided with a bending portion 4 which can be bent and stretched in a substantially rectangular shape and which is urged in an extended state by an elastic body 7, and which moves in the bending direction of the bending portion 4. A main linking body A provided with a pressable rocking body 10 capable of being pressed and an unlocking means A2 capable of moving the pressing rocking body 10 by axial movement of the pressing screw rod 11; And a connecting member for a construction work machine, wherein the leading end of the lock body A1 protrudes toward the connected body B side and is elastically connected through contact with the main connected body A and the connected body B, The connection between the main connecting body A and the connected body B can be instantaneously performed, the lock can be easily released, and secondly, the structure can be extremely simplified.

To explain the above effect in detail, the lock A1 provided on the main connected body A projects through the connected body B when the main connected body A and the connected body B come into contact with each other. Thereby, the connection between the main linked body A and the linked 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 lock body A1 projects and penetrates to the connected object B side. Operation can be extremely simple,
In addition, since the connection can be reliably performed, it is not necessary to check the connection state, and an operator involved in the connection can be eliminated.

The connection state is such that the lock body A1 provided on the main connection body A projects and penetrates to the connected body B side and is connected, so that the lock body A1 is horizontally and vertically in the axial direction of the lock body A1. This is extremely strong against vibrations and shocks, and is extremely strong against vibrations and shocks as compared with a conventional locking type using a claw and a shaft, and can have durability.

Next, the lock body A1 is configured such that the bending portion 4 is
Since the lock member A1 is always urged to the extended state by using the lock member, once the lock body A1 is once locked, the extremely strong lock state can be maintained until the lock is released.

Further, the lock body A1 is capable of flexing and extending in a substantially rectangular shape, and is urged by the elastic body 7 into an extended state.
The unlocking means A2 rotatably connects the end of the pressing screw rod 11 to a pressing rocking body 10 capable of pressing the bending and stretching portion 4, and further moves the pressing screw rod 11 on a horizontal plane. It is screwed and supported by a rotatable screw rod receiver 12, and the pressing oscillating body 10 can be abutted and pressed along the bending portion of the bending portion 4.

Therefore, in a state where the main connector A and the object B are connected and the lock body A1 projects and penetrates toward the object B, it is strongly pressed by the load received from the object B. When the lock body A1 is hardly pulled out of the connected body B when the lock body A1 is pulled out, a large force is required to pull out the lock body A1 from the connected body B. The pressing force of the pressing rocking body 10 is
The lock can be released with a relatively small force, and the burden on the operator can be reduced.

Next, the pressing oscillating body 1 which can press the bending and stretching portion 4 freely.
0, the end of the pressing screw rod 11 is rotatably connected, and the pressing screw rod 11 is screwed and supported by a rotatable screw rod receiver 12, so that the pressing screw rod 11 is connected to the screw rod receiver 12. By being screwed, by rotating the pressing screw rod 11, the axial force of the pressing screw rod 11 is directly applied to the pressing oscillator 1.
0, and the screw rod receiver 12 is made rotatable so that the pressing screw rod 11 is axially moved without applying an excessive load to the pressing screw rod 11 other than in the axial direction. .

[0055]

[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.

FIG. 4 is a sectional view of a main part showing a lock body and a lock release means.

FIG. 5 is a plan view of a main part of the present invention.

FIG. 6 is a cross-sectional view taken along arrow PP of FIG. 5;

FIG. 7 is a sectional view taken along the line QQ in FIG. 5;

8A is a schematic diagram showing a state in which an attachment is attached to the end of a boom. FIG. 8B is a schematic diagram in which a connected body is provided integrally with the attachment.

FIG. 9 is a longitudinal sectional side view showing a state in which the main connected body and the connected body are engaged at one end in the front-rear direction.

FIG. 10 is a longitudinal sectional side view of a main part showing a state in which the locking arm is released from the lock body and locked.

FIG. 11 is a vertical cross-sectional view of a lock body.

[Explanation of symbols]

 A: Main connecting body A1: Lock body 4: Bending / extending portion 7: Elastic body B: Connected body A2: Lock release means 10: Pressing rocking body 11: Pressing screw rod

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

Claims (1)

(57) [Claims] 1. A lock body provided with a bending portion which can be bent and stretched in a substantially rectangular shape and urged in an extended state by an elastic body, and a pressing rocking member which can be moved and pressed in the bending direction of the bending portion. ,
A main connecting body provided with a lock releasing means capable of moving the pressing oscillating body by the axial movement of the pressing screw rod; and a connected body, and locked by contact between the main connecting body and the connected body. A connection tool for a construction work machine, wherein a body tip projects and penetrates to a connected body side and is resiliently connected.