JPS6235710Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cylinder pivot structure for an earth removal plate in an earth removal device having an earth removal plate.

Generally, in this type of earth removal device, the earth removal plate is raised and lowered by a hydraulic cylinder, and the pivot structure between the hydraulic cylinder and the earth removal plate is as follows.
Install left and right bracket pieces protruding from the back of the earth removal plate,
The tip of the hydraulic cylinder is pivotally supported between the two bracket pieces by a pivot pin. However, in earth removal equipment used for bulk cargo work, the gap between the two bracket pieces is wide, and as a result, earth and sand enters the interior of the pivot, damaging the pivot and interfering with the lifting and lowering movement of the earth removal plate. The problem was that it could be harmful. Furthermore, the above-mentioned pivot pin is provided with a grease nipple on its head, and the inside of the pivot is supplied with oil from this grease nipple, but there is a possibility that this grease nipple may be covered with earth and sand and damaged during earth removal work. It was hot.

Therefore, in this proposal, a reinforcing plate is installed between the two bracket pieces to prevent the bracket pieces from opening, and at the same time, this reinforcing plate is also used as a soil protection plate for the pivot, and this reinforcing plate is used to install the grease nipple. It is intended to protect the

The present invention will be explained below based on embodiments shown in the drawings.

A is a backhoe equipped with an earth removal device B at the rear of the machine, and a swivel platform 2 is installed on the top of the crawler traveling device 1.
and a drive unit such as a control cabin 3 and an engine 4 are disposed on the swivel base 2, and an excavation device 5 having a bucket 5' at the tip thereof is installed at the tip of the swivel base 2. There is.

The earth removal device B includes a support beam 6 whose base end is pivotally mounted 6' to the machine body, and a soil discharge plate 7 provided at the tip of the support beam 6, and a bracket 9 whose base end of a hydraulic cylinder 8 is provided to the machine body.
At the same time, a pair of left and right bracket pieces 10, 10' are provided protruding from the back surface of the earth removal plate 7.
Between these two bracket pieces 10, 10', the tip of the hydraulic cylinder 8 is pivoted by a pivot pin 11 8b.
It has a similar structure. By operating the hydraulic cylinder 8, the earth removal plate 7 is raised and lowered around the base end pivot portion 6' of the support beam 6.

Reference numeral 12 denotes a grease nipple protruding from the head of the pivot pin 11, from which grease is supplied into the interior of the pivot 8b.

Reference numeral 13 denotes a pin head plate provided on the head of the pivot pin 11, and is shaped like a circular plate with a flat portion 13' formed on the lower side thereof.

Reference numeral 14 denotes a rotation prevention plate for the pivot pin 11, and the pivot pin 1 is fixed on the outer surface of one bracket piece 10.
The rotation of the pivot pin 11 is restricted by bringing the flat portion 13' of the pin head plate 13 into contact with the upper surface of the rotation prevention plate 14. The protruding width of this anti-rotation plate 14 is made wider than the protruding width of the grease nipple 12, so that the anti-rotation plate 14 is connected to the grease nipple 1.
It is made to protrude in a state that protrudes outward more than 2.

Reference numeral 15 denotes a reinforcing plate fixedly installed between the upper surfaces of the two bracket pieces 10 and 10', and this reinforcing plate 1
5 prevents both bracket pieces 10, 10' from opening, and at the same time, this reinforcing plate 15 is also used as a soil protection plate for the cylinder pivot portion 8b, and one end side of the reinforcing plate 15 is extended above the grease nipple 12. Thus, the grease nipple 12 is protected by the extended portion 15'.

Note that 16 in the figure is a retaining pin provided at the tip of the pivot pin 11, and 17 is a dog-shaped reinforcing plate provided on the back surface of the earth removal plate 7.

Therefore, when performing earth removal work (ground leveling work), the machine body is moved forward and backward while raising and lowering the earth removal plate 7 using the hydraulic cylinder 8. At this time, the load associated with the pressing of soil is Even if a force in the opening direction is applied to both the bracket pieces 10, 10' of the cylinder pivot portion 8b due to The force in the opening direction is received by the reinforcing plate 15, which acts on both bracket pieces 10 and 1.
This prevents the opening of 0'.

Also, due to the pushing of the earth, the earth and sand will cross over the back side of the earth removal plate 7, but in this case, the pivot part 8b
is covered above by the reinforcing plate 15, which allows the reinforcing plate 15 to function as a soil protection plate for the pivot 8b while preventing earth and sand from entering the pivot 8b. Further, since the grease nipple 12 provided on the pivot pin 11 is also covered above by the extending portion 15' of the reinforcing plate 15, earth pressure from above is blocked by the extending portion 15'. Damage caused by sediment can be prevented. In addition, in this example,
Since the anti-rotation plate 14 is structured to protrude outward from the grease nipple 12, earth pressure from below is also received by the anti-rotation plate 14, and the grease nipple 12 is protected from above and below. It's summery.

As described above, according to the present invention, the reinforcing plate can prevent the bracket pieces in the cylinder pivot from opening, so it is possible to prevent dirt from entering the interior of the pivot. Not only can the pivot portion be protected, but also the grease nipple can be further protected by using this reinforcing plate, and its structure can be made extremely simple.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the backhoe equipped with an earth removal device. Figure 2 is a side view of the soil removal device. Figure 3 is a plan view of the same. FIG. 4 is a rear view of the cylinder pivot. A: Backhoe, B: Earth removal device, 6: Support beam, 6': Pivot part, 7: Earth removal plate, 8: Hydraulic cylinder, 8a: Pivot part, 8b: Cylinder pivot part, 1
0,10': Bracket, 11: Pivot pin, 1
2: Grease nipple, 13: Pin head plate, 14: Anti-rotation plate, 15: Reinforcement plate, 15': Extension part.

Claims (1)

[Scope of utility model registration request] An earth removal plate 7 is provided at the tip of the support beam 6 whose base end is pivotally attached 6' to the fuselage, and the base end of a hydraulic cylinder 8 is pivotally attached 8a to the airframe, and the tip of the hydraulic cylinder 8 is attached to the earth removal plate. The pivot pin 11 is used between the bracket pieces 10 and 10' protruding from the back of the
In the soil removing device configured to have the structure shown in FIG. One end of the reinforcing plate 15 is extended above the grease nipple 12 provided on the head of the pivot pin 11, and the grease nipple 12 is protected by the extended portion 15'. Earthen plate cylinder pivot structure.