JPS6227555Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of a shovel working device in which a shovel is rotatably attached to the tip side of a work arm that can be freely swung up and down as well as bent and extended; The present invention relates to a shovel work vehicle with a dozer, which is provided with a dozer work device and a fixture that can mechanically prevent the dozer work device from lowering.

Conventionally, in the above-mentioned work vehicle, the shovel of the shovel working device is placed on the upper part of the blade of the dozer working device, and the posture of the shovel working arm and the shovel are fixed by neutral locking operation of the control valve of the cylinder with respect to them. However, when the shovel is mounted and supported on the upper surface of the blade, the stability is greatly affected by the shape of both, or the swing base of the working arm is partially affected. Means have been taken to mechanically fix the end arm portion to the vehicle body and to connect the shovel to the arm portion using a chain or the like, but this is labor intensive and troublesome, and in either case, If pressure oil leaks from the cylinder or its control valve, the storage position of the shovel working device collapses, and there is a great risk that the shovel or its corresponding cylinder will be damaged by contact with the ground.

In view of the above-mentioned circumstances, the present invention aims to eliminate the above-mentioned drawbacks with an extremely simple structure.

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

A dozer working device 3 having a blade 2 attached to the tips of a pair of left and right arms 1, 1 is attached to a vehicle body 5 equipped with a wheel type traveling device 4 so as to be able to be raised and lowered from the ground, and is equipped with a control section 6 and a driving section 7. Shovel work in which a rotating platform 8 is attached to the traveling vehicle body 5 so as to be freely rotatable around the vertical axis, and a shovel 10 is attached to the tip of a working arm 9 that can be freely swung vertically and can be bent and extended. The device 11 is connected to one end of the swivel base 8 so as to be swingable around the vertical axis, thereby forming a wheel-type work vehicle with a dozer.

A fixing device 12 is provided between the vehicle body 5 and the dozer working device 3, and is operable to release the fixing device 12, which mechanically prevents the blade 2 from descending to the ground during non-dozer work. Between the shovel working devices 11, when both the working devices 3 and 11 are in a non-working state and the dozer working device 3 is mechanically prevented from descending, the shovel working device 11 is mechanically prevented from descending to the ground. A blocking mechanism 13 can be attached.

To configure the fixture 12 that prevents the blade 2 from descending, brackets 14 and 15 are attached to the back surface of the blade 2 and the front end surface of the vehicle body 5, respectively, and when the blade 2 is in the highest state, Both brackets 14 and 15 are connected by a rod 16, and the rod 16 is connected to the dozer working device 3 when the bracket 15 is disconnected from the vehicle body side bracket 15.
A bracket 1 for rod connection is attached to the stay 17 spanning the left and right arms 1, 1 in order to connect the left and right arms 1, 1.
8 is provided so that the blade 2 can be switched between a state A in which vertical swinging is allowed and a state B in which the blade 2 is prevented from descending.

Lowering prevention mechanism 13 of the shovel working device 11
, a pin 20 having a large diameter head is formed on an engaging member 19 having a mounting part a for the upper surface of the blade 2 and contact parts b for contacting the front and rear parts of the upper part of the blade. 20, and this pin 2
Holes c, c as attachment portions having approximately the same pitch as the planting pitches 0 and 20 and penetrating the large diameter head.
are drilled in each of the left and right side plates 10a of the shovel 10 at substantially the same phase locations in side view, and through holes d, d of the same pitch as the holes c, c are formed in the retaining plate 21, Then, the engaging member 19
The pins 20, 20 are inserted into the holes c of the shovel side plate 10a,
c, and the pins 20, 20 are engaged with the holes d, d of the retaining plate 21, and by striking the retaining member 21 from above, the retaining member 21 is attached to the side plate of the shovel. In order to tightly fit between the inner surface of the pin head 10a and the inner surface of the pin head, cam surfaces S, S are formed at the portion of the retaining member 21 that faces the pin head, and as necessary, the engaging members 19, 1
By attaching the blade 9 to the shovel 10 and locking and placing it on the upper part of the blade 2 whose descent is prevented, it is possible to mechanically prevent the shovel working device 11 from descending to the ground.

It should be noted that there are some methods for removably attaching the engaging member 19, such as connecting the engaging member 19 to the shovel 10 with bolts, or using a small drainage hole drilled in the shovel 10 as the connecting hole d. The specific structure can be modified in various ways, and as the engaging member 19, as shown in phantom lines in FIG. The specific structure of the engaging member 19 can be modified in various ways, such as being configured to lock and prevent upward movement of the shovel working device 11.

In summary, the present invention, in the above-mentioned shovel work vehicle with a dozer, has a mounting part a on the upper surface of the blade 2 of the dozer working device 3, and a contact that contacts the front and rear surfaces of the upper part of the blade 2 in the mounted state. Department b,
An engaging member 19 formed with b is provided, and
Attachment parts c and c are formed on the shovel 10 to detachably fix the engaging member 19, and the engaging member 9 is hooked onto the upper part of the blade 2 to mechanically lower the shovel working device 11. The present invention is characterized by comprising a mechanism 13 that prevents this from occurring.

That is, by locking the shovel working device 11 to the dozer working device 3 which is mechanically prevented from descending via the intermediate engagement member 14, it can be stably operated without being affected by the shape of the blade 2 or the shovel 10. It becomes possible to prevent the shovel working device 11 from descending, and in that state, the shovel working device 11 can be prevented from descending.
is locked and fixed to the blade 2, so the posture of the working arm 9 is restrained by three points: the locking and fixing part, the fixed swing axis for swinging the arm, and the axis for bending and extending the arm. This means that even in the unlikely event that pressure oil leaks, your posture will not collapse.
Damage to the shovel 10 and its corresponding cylinder can be prevented.

Since the engaging member 19 is attached as necessary, it does not interfere with normal dozer work or shovel work, and the addition of a simple structure allows for stable operation as a whole. It is now possible to mechanically prevent the shovel working device from descending.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of a shovel work vehicle with a dozer according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a vertical side view of the main part, and Fig. 3 is a cross-sectional view taken along the line - - of Fig. 2. . 3... Dozer working device, 9... Working arm,
10...Shovel, 11...Shovel working device,
13...Descent prevention mechanism, 19...Engagement member.

Claims (1)

[Scope of utility model registration request] Working arm 9 that can swing up and down and bend and extend freely
A shovel working device 11 has a shovel 10 rotatably attached to the tip side of the machine, a dozer working device 3 is attached to the machine so as to be able to move up and down, and the lowering of the dozer working device 3 can be mechanically prevented. In the excavator work vehicle equipped with a dozer, the dozer work device 3 has a mounting part a on the upper surface of the blade 2, and abutment that contacts the front and rear surfaces of the upper part of the blade 2 in the mounted state. The engaging member 19 is provided with portions b and b, and mounting portions c and c are formed for removably fixing the engaging member 19 to the shovel 10. Shovel working device 11 hooked onto the upper part of the blade 2
A shovel work vehicle with a dozer, comprising a mechanism 13 for mechanically preventing the lowering of the dozer.