JPS5920451Y2 - Work tool mounting structure of work vehicle - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed to facilitate the operation of attaching and detaching various working implements, such as a shovel, to a work implement attachment member such as an arm. Joint part 2
and, on the other hand, a locking mechanism 1.6 having a pin 1 that is automatically inserted into the engaging portion 2 by the action of a spring 4 as the two 12.11 approach. Regarding the work tool mounting structure, the present invention aims to simplify the locking mechanism and to ensure that the work tool is prevented from coming off.

Next, embodiments of the present invention will be described based on illustrative drawings.

A pair of arms 7.7 are pivotally mounted on both sides of the body 6 equipped with the wheel-type traveling device 5 so as to be able to swing freely around a horizontal axis, and a swing drive cylinder 8 is provided between the arms 7 and the body 6.
.
A shovel work tool 12 is connected to the machine body 6 to form a shovel work vehicle that scoops up dirt and the like as the machine body 6 travels.

The working tool 12 is configured to be able to be replaced with various working tools as attachments so that the form of the working vehicle can be appropriately changed according to the working form.

That is, various work tools 12 are prepared as attachments 1 to 12.
A locking structure E1 is provided on each of the side structures E1., and an engagement structure E2 is provided on the mounting member 11 on the other working vehicle side, so that the side structure E1. E2
The work tool 12 is configured to be securely attached to the work vehicle by means of the above.

To configure the locking structure E1, as shown in FIG. 2, a downwardly opening recess 13 is provided at the upper part of the back surface of the work implement 12, and a bracket 14 protruding from the lower part of the rear face serves as an engaging part 2 of the work implement in the vertical direction. A through hole is provided.

Then, to configure the engagement structure E2, the mounting member 11
An insertion portion 15 that can be inserted into and removed from the downward opening recess 13 is provided at the upper end, and the work tool 12 and the mounting member 11 are provided at the upper end.
A locking mechanism 16 is provided at the lower end of the mounting member 11 so that the pin 1 is automatically inserted into the retaining portion 2 as the pin 1 approaches.

That is, the insertion portion 15 is inserted into the opening recess 13 of the working tool 12 placed at an appropriate location such as on the ground by moving the machine body, and the working tool 12 is locked to the mounting member 11.

Then, when the working tool 12 is lifted up by the lifting operation of the arm 7 and the working tool 12 is moved toward the mounting member 11 by its own weight swinging, the locking mechanism 16 enters the locking state, and the working tool 12 is moved toward the mounting member 11. It should be fixed.

The locking mechanism 16 is constructed as shown in FIGS. 2, 3, and 4.

That is, the pin 1 is rotatably and slidably attached to a cylindrical body 17 fixed to the mounting member 11 in the vertical direction of the machine body, and is urged to slide in the direction of insertion into the retaining part 2 by a spring 4. A rod-shaped stopper 18 extending in the radial direction of the cylindrical body 17 is provided so as to be rotatable and slidable integrally with the pin 1.

A notch 20 having an opening in the upper end surface 19 of the cylindrical body 17 and being long in the sliding direction of the pin 1 is provided in the cylindrical body 17 so that the stopper 18 can be freely inserted and removed. The lower part of the cutout part 20 is provided with a stepped part as a locking part 22 which prevents removal from the cutout part 20 by abutting against it.

A guide portion 22 for guiding the stopper 18 inserted into the notch 20 to the locking portion 21 is provided on the notch forming wall.

As the work tool 12 and the attachment member 11 are brought closer together, the stopper 18 is brought into contact with the stopper 18 placed on the end surface 19 from within the notch 20 and is rotated to position it at the opening of the notch. A working piece 23 is provided on the working tool 12.

In other words, as shown in FIGS. 8 and 4A, the stopper 1
When the pins 8 are positioned on the upper end surface 19 of the cylindrical body, the pin 1 can be held against the spring 4 in the retracted state from the inserted position to the extracted position from the retaining part 2. .

As the work tool 12 and the mounting member 11 approach each other, when the stopper 18 is positioned at the notch opening by the pressing piece 23 as shown in FIG. The action causes the stopper 18 to close to the notch 20.
As the pin 1 is lowered, the pin 1 is inserted into the engaging portion 2, and as the stopper 18 is lowered, it is positioned in the locking portion 21 by the action of the guide 22, and the stopper 18 is positioned in the locking portion 21 by the action of the guide 22. When the stopper 18 hits, the retaining part 2 of the pin 1
This is to prevent sliding in the direction of removal.

Note that the stopper 18 may be rotatably attached to the pin 1.

Further, the locking mechanism 16 is attached to the retaining portion 2 on the mounting member 11 side.
may be attached to the work tool 12 side.

In summary, in the above-mentioned work implement mounting structure for a working vehicle, the locking mechanism 16 is configured by attaching the pin 1 to a cylindrical body 17 so as to be slidable therein.
The pin 1 is provided with a stopper 18 extending in the radial direction of 7, so that the pin 1 can be held in the retracted state by the contact between the end surface 19 of the cylindrical body 17 and the stopper 18, and the stopper 18 A notch is provided in which a pressing piece 23 is provided which is rotated by the contact between the working tool 12 and the mounting member 11 as they approach, and the stopper 18 is slid integrally with the pin 1 by the spring 4 as the stopper 18 rotates. a section 20 is provided on the cylindrical body 17, and
It is characterized in that the notch 20 is provided with a locking portion 21 that prevents the pin 1 from sliding in the pulling direction from the retaining portion 2 by coming into contact with the stopper 18.

According to the locking mechanism 16 configuration, the pressing piece 23
The posture of the pin 1 can be changed simply by extending the stopper 18 that is rotated by the pin 1 and providing a notch 20 in the cylindrical body 17 that allows the stopper 18 to move in the axial direction of the cylindrical body. This made it possible to simplify the structure.

Moreover, the contact between the stopper 18 and the locking part 21 prevents the pin 1 from being pulled out from the retaining part 2, so the pin 1 can be reliably prevented from coming out, and the work tool 12 can be prevented from coming off. It is now possible to stop with certainty.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings illustrate an embodiment of the work tool mounting structure for a work vehicle according to the present invention, and FIG. 1 is an overall side view of the excavator work vehicle, and FIG. 2 shows the state in which the work tool is attached. A sectional view, FIG. 3 is a plan view of the locking mechanism, and port 19 in FIG. 4. C is an explanatory view showing the lock mechanism and its operating state. 1...pin, 2...engaging portion, 4...
...Spring, 11...Mounting member, 12.
...Working tool, 16...Lock mechanism, 17
...Cylindrical body, 18 ...Stopper, 1
9... End face, 20... Notch, 21.
...Locking portion, 23...Press action piece.

Claims (1)

[Scope of utility model registration request] A retaining part 2 is attached to one of the work tool 12 and a mounting member 11 therefor, and the other is dynamically inserted into the engaging part 2 by the action of the spring 4 as both 11 and 12 approach. This is a work tool mounting structure in which lock mechanisms 16 each having a pin 1 are provided, and the lock mechanism 16 is configured by attaching the pin 1 to a cylindrical body 17 so as to be slidable, and attaching the pin 1 to a cylindrical body 17.
The pin 1 is provided with a stopper 18 extending in the radial direction of 7, so that the pin 1 can be held in the retracted state by the contact between the end surface 19 of the cylindrical body 17 and the stopper 18, and the stopper 18 A notch is provided in which a pressing piece 23 is provided which is rotated by the contact between the working tool 12 and the mounting member 11 as they approach, and the stopper 18 is slid integrally with the pin 1 by the spring 4 as the stopper 18 rotates. a section 20 is provided on the cylindrical body 17, and
The working vehicle is characterized in that the cutout portion 20 is provided with a locking portion 21 that prevents the pin 1 from sliding in the pulling direction from the engagement portion 2 by contacting the stopper 18. Work tool mounting structure.