JPS5910209Y2 - Angle dozer device - Google Patents

Description

[Detailed explanation of the idea] This invention relates to improvements in angle dozer equipment.

Conventionally, this type of angle dozer device is one in which both ends of an earthwork plate supported in the center are left free and the earthwork plate can be tilted to a desired angle with a single angle cylinder, and the other is one in which the earthwork plate is tilted to a desired angle with a single angle cylinder. It is known that the earthwork board is supported at both ends by support frames and a pair of angle cylinders are provided on each support frame so that the earthwork board can be tilted to a desired angle by these angle cylinders.

However, while the former method, which operates the angle with a single angle cylinder, has a simple structure, it is difficult to support heavy loads because it does not support both ends of the earthwork board, and the latter, with two angle cylinders, has a simple structure. In the case of an angle-operated type, the load is supported by each angle cylinder, and the angle operation is performed at both ends of the earthwork plate, which requires a large-sized angle cylinder with a large stroke, which is uneconomical.

This idea was made with the aim of solving this problem.The angle dozer is designed to operate the angle of the earthwork plate using a small single cylinder, and to support the load using support frames installed on both ends of the earthwork plate. The aim is to provide a device with relatively simple construction and at low cost.

This invention will be described in detail below with reference to an illustrated embodiment.

In the figure, 1 is a self-propelled vehicle that can move freely by means of a foot support 3 equipped with crawler tracks 2. A C-shaped frame 5, which can be raised and lowered by a lift cylinder 4, is provided at the front of the vehicle body 1a. Both ends of the C-shaped support frame 5 are rotatably supported by the track frame 3a of the leg support 3 via a trunnion 6.

In addition, a bracket 7 is provided at the center of the front part of the support frame 5.
The center part of the rear surface of the earthwork board 8 is rotatably supported by a vertical pin 9, and a support frame 5 is provided on the rear surface of the earthwork board 8 at a position offset from the center part to one end side. The tip of the angle cylinder 10 is pivoted by a pin 11, and the angle cylinder 10 allows the earthwork plate 8 to be angled around the vertical pin 9 to the position indicated by the chain line in FIG.

On the other hand, a pair of places 1 are provided on the rear surface of both ends of the earthwork board 8.
One end of each place 12 is pivotally attached by a pin 13, and the other end of each place 12 is pivotally attached via a pin 15 to the side surface of a sliding member 14 movably provided on the parallel part 5a of the support frame 5. ing.

The sliding member 14 has a rectangular cylindrical shape, and a bracket 16 is provided protruding from the outer surface, and the pin 15 is attached to the bracket 16.
The ends of the place 12 are pivotally connected.

Further, a lock cylinder 17 is fixed to the upper part of each sliding member 14.

A piston 17b with a piston rod 17a facing downward is accommodated in the lock cylinder 17.
The tip of 7a is in contact with the upper surface of the support frame 5, and by supplying pressure such as hydraulic pressure to the pressure chamber 17C of the lock cylinder 17, the sliding member 14 is pulled up with respect to the support frame 5. It looks like this.

A locking hole 14 a is provided at the bottom of each sliding member 14 , and locking blocks 18 provided at intervals in the longitudinal direction on the bottom surface of the support frame 5 prevent the sliding member 14 from rising. A notch 14b is provided in the center of the outer side of the sliding member 14 in the horizontal direction.

This notch 14b is for passing a plurality of sets of locking blocks 19 protruding from the outer surface of the support frame 5 in correspondence with the locking blocks 18.
is in the lowered position with respect to the support frame 5 (the state shown in FIG. 4), the locking block 19 passes through the notch 14b, allowing the sliding member 14 to move, and causing the sliding member 14 to rise. At this time (the state shown in FIG. 6), both ends of the sliding member 14 are locked between the respective locking blocks 19.

Therefore, when operating the angle of the earthwork plate 8, each sliding member 14 is opened without supplying pressure to the lock cylinder 17, and in this state, the angle cylinder 10 is expanded and contracted to rotate the earthwork plate 8. The work board 8 is tilted in a desired direction.

Next, regarding the tilting of the earthwork board 8, the parallel part 5a of the support frame 5
When the sliding member 14, which moves back and forth, is positioned between predetermined locking blocks 19 of the support frame 5, pressure is supplied to the lock cylinder 17.

As a result, each sliding member 14 changes from the state shown in FIG.
The locking hole 1 at the bottom of the sliding member 14 is raised to the state shown in the figure.
4a is fitted into and locked into the locking block 18, and at the same time, the sliding member 1 is inserted between the locking blocks 19 on the outer surface of the support frame 5.
Both ends of 4 are locked.

Therefore, if angle work is performed in this state, the load applied to the earthwork plate 8 will be transmitted to each sliding member 14 via the place 12, and will be further supported by the support frame 5 via each locking block 18, 19, so that the angle The angle cylinder 10 may be small enough to operate the earthwork board 8 at an angle without applying any load to the cylinder 10.

As detailed above, this idea is very economical because the angle cylinder that angles the earthwork plate is small and only needs a single cylinder, and the load applied to the earthwork plate is distributed to the outer and lower surfaces of the support frame. The sliding member is supported by the support frame through the sliding member fixed to the support frame by the protruding locking block and the lock cylinder that contacts the top surface of the support frame, so the sliding member does not deform due to excessive load. There is no risk of damage or damage.

Furthermore, since a vertical space is provided between the support frame and the sliding block, the sliding member can be easily and reliably moved relative to the support frame.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with Fig. 1 being an overall plan view, Fig. 2 being a side view of the same, Fig. 3 being a side view of the sliding member in the open state, and Fig. 4 being a cross-sectional view of the same. 5 is a side view of the sliding block in the locked state, and FIG. 6 is a sectional view thereof. 1 is a self-propelled vehicle, 1a is a vehicle body, 4 is a lift cylinder, 5 is a support arm, 8 is an earthwork board, 10 is an angle cylinder, 14
1 is a sliding member, 17 is a lock cylinder, and 18 and 19 are locking blocks.

Claims (1)

[Claims for Utility Model Registration] A support frame 5 that can be raised and lowered by a lift cylinder 4 is provided at the front of the vehicle body 1a of the self-propelled vehicle 1, and the front part of the support frame 5 can be rotated horizontally by an angle cylinder 10. A flexible earthwork plate 8 is provided, and one end of a pair of places 12 is pivotally attached to the rear surface of both end sides of the earthwork plate 8, and a sliding member 14 having a vertical clearance with respect to the support frame 5 is supported. A lock cylinder 17 is inserted into the frame 5 so as to be movable in the longitudinal direction of the frame 5, and a lock cylinder 17 that protrudes and retracts toward the support frame 5 is attached to the upper part of the sliding member 14, and a lock cylinder 17 is attached to the lower part of the sliding member 14.
During operation, a locking hole 14a into which the locking block 18 protruding from the lower surface of the support frame 5 is fitted is provided, and the locking block 18 is inserted into the locking hole 1 on the outer surface of the support frame 5.
A plurality of pairs of locking blocks 19 are protruded to abut against the front and rear end surfaces of the sliding member 14 when the person is fitted into the sliding member 4a, and the other end of the place 12 is pivotally attached to the outer surface of the sliding member 14. Angle dozer device. one