RU2085663C1 - Bulldozer with reversing blade - Google Patents

Abstract

FIELD: earth-moving machinery; vehicles intended for operation in confined spaces under limited maneuverability conditions. SUBSTANCE: bulldozer with reversing blade has base vehicle, pushing bars, blade with upper and lower knives, pushing bar turning hydraulic drive made in form of two pairs of hydraulic cylinders. Housings of hydraulic cylinders are hinge-connected with base vehicle. Locks and guides are installed on pushing bars. Sliders are fitted on guides. Rods of hydraulic cylinders are hinge-connected to trunnions. EFFECT: enlarged operating capabilities. 3 dwg

Description

 The invention relates to earth moving vehicles, namely to bulldozers, and can be used to work in conditions of limited maneuverability.

 Known overlay, containing the base machine, a working body in the form of a blade and a hydraulic actuator, providing rotation of the working body.

 The design of the track-laying machine does not provide rotation of the working body with the possibility of the machine working when moving in the opposite direction.

 Known bulldozer, including the base machine, a hinged frame with a vertical rack, blade and hydraulic drive, which provides rotation of the working body.

 The rear arrangement of the working body of such a bulldozer limits the technological capabilities of the machine, and operations for the changeover of the blade increase the complexity of the work.

 Also known is a loader for loading long materials, selected as a prototype, including a base machine, a boom that rotates in a vertical plane, which plays the role of pushing bars, a working body and a hydraulic actuator made in the form of two pairs of single-acting hydraulic cylinders.

 The well-known loader cannot be used as a bulldozer when working in the forward and reverse direction, because its design does not allow to provide the necessary effort when deepening the blade and the insufficient angle of rotation of the pushing beams.

 To ensure the necessary efforts on the knives of the blade of the bulldozer when it is buried in the ground when moving in the forward and reverse direction and the increase in the angle of rotation of the pushing bars in the proposed bulldozer with a cross over blade, these disadvantages are eliminated to an initial degree. To do this, on the pushing bars there are guides with sliders installed in them, to the trunnions of which the hydraulic cylinder rods are pivotally connected, and on the pushing bars there are latches.

Figure 1 shows a bulldozer with a cross over blade, general view; in FIG. 2
section AA in FIG. one; in FIG. 3 kinematic scheme of work.

 The bulldozer with a cross over blade contains a base machine 1, pushing bars 2 with draft joints 3, a blade 4 with upper and lower legs; guides 5 mounted on the pushing bars 2; sliders 6 mounted in guides 5; hydraulic cylinders 7 and 8, the bodies of which are pivotally connected to the base machine 1, and the rods are pivotally connected to the pins of the sliders 6; clamps 9 mounted on the pushing bars 2.

 The dozer with a cross over blade works as follows.

 When the bulldozer moves along arrow B, the slider 6 connected to the hydraulic cylinder 7 is fixed (Fig. 2), and the slider connected to the hydraulic cylinder 8 can freely move in its guide 5. For deepening or deepening the blade 4 includes a hydraulic cylinder 7.

 To enable the bulldozer to work in the opposite direction, the hydraulic cylinder 7 is turned on to extend the rod, and the hydraulic cylinder 8 is locked. In this case, the pushing bars 2 are rotated relative to the hinges 3 to the "dead" position of the hydraulic cylinder 7 (Fig. 3) and the slider 6 of the hydraulic cylinder 8 is moved all the way to the stop, where it is fixed similarly to the hydraulic cylinder slider 7, as shown in Fig. 2. After that, the latch 9 of the hydraulic cylinder 7 is turned off and the hydraulic cylinder 8 is turned on to extend the rod, which continues the further rotation of the pushing bars 2 to the “dead” position of this hydraulic cylinder (Fig. 3). At this moment, the hydraulic cylinder 8 is turned off, the pushing bars continue to rotate under their own weight, and after passing through the "dead" position, the hydraulic cylinder 8 is turned on to retract the rod, which further lowers and sets the pushing bars into working mode with the working body. The rotation of the pushing bars in the opposite position occurs as described.

Claims (1)

 A dozer with a cross over blade, including a base machine, pushing bars, a blade with upper and lower knives and a hydraulic drive for turning the pushing bars, made in the form of two pairs of hydraulic cylinders, the casings of which are pivotally connected to the base machine, characterized in that the clamps and guides are installed on the pushing bars in which the sliders are installed, to the trunnions of which the hydraulic cylinder rods are pivotally connected.

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