SU933889A1 - Bulldozer - Google Patents

Description

(54) BULLDOZER

one

The invention relates to construction and road machines, in particular to earth-moving machines such as bulldozers.

A bulldozer is known that includes a base machine, a blade with a push rod, bars and it is installed in front of the blade in the subtype support of the driving auger. When moving the bulldozer forward, the auger moves the soil to the side, which is usually used when backfilling trenches 1.

The disadvantage of the bulldozer is the high energy intensity of the cutting process and the movement of the soil in connection with the presence of high frictional forces during the interaction of the screw with the soil.

The closest to the proposed is a bulldozer, including a base tractor, pushing bars, a blade mounted in front of the blade in the bearing supports with screw screw covers on the shaft with a collar spring-loaded along the longitudinal axis and the drive sprocket mounted on the screw shaft.

When the base tractor moves, the screw rotates and the end surface of the drive sprocket, having sinusoidal projections, is pressed by a spring to the tapered rollers fixed to the bearing support housing, due to which the screw acquires reciprocating oscillations along the shaft axis. This makes it possible to reduce the energy intensity of the process of moving the soil by the screw. In this bulldozer, the combination of the projections of a sinusoidal sprocket with tapered rollers and springs is a vibrator 2.

The disadvantage of such a bulldozer is the complexity of the design due to the need to use a vibrator.

The purpose of the invention is to simplify its design by communicating axial vibrations to the screw without using a vibrator.

Claims (2)

This goal is achieved by the fact that the screw is equipped with interchangeable cutting elements mounted on the screw surface of the screw with equal intervals, while the spring assembly of the shaft is placed on it from the drive side and made of two springs, each of which is located between one of the bearing supports and the end drive sprocket and collar shaft. FIG. 1 shows a bulldozer, general view; in fig. 2 is a view .A in FIG. one; on fng. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 3, rotated; in fig. 5 is a section of YYD in FIG. 3, rotated; in fig. 6 is a section d-d in FIG. 2; in fig. 7 — node I in FIG. 2. The bulldozer turns on the base tractor 1, the blade 2 and the screw auger mounted on it 3. The blade 2 is connected to the blade 2 by two pushing bars 4 and hydraulic cylinders 5 and the base tractor 1. The push bars are connected to the blade 2 by braces 6. Screw 3 on the shaft 7 is installed in support bearings 8, which by means of the brackets 9 are fastened to the blade 2 in such a way that the axis of the screw shaft coincides with the center of curvature of the blade. The screw 3 is rotated through a chain transmission 10 from the hydraulic motor 11 mounted on the blade 2. On the screw surface of the screw 3 there are fixed interchangeable cutting elements 12, which are installed at the same distance from each other, and elements 13 between the cutting elements 12, to protect the screw surface from wear, and to the opposite side of the same screw surface along the entire length of the ribs 14 stiffness welded. The fastening of the cutting 12 and the safety elements 13 is carried out with the help of bolts 15 and nuts 16. On the shaft of the screw 3 there are two springs 17 and 18 of the same rigidity, forming a spring assembly. The spring 17 is located between the collar of the shaft 7 of the screw and the lid 19 of the support case 8. The spring 18 is installed between the cover 20, the hub of the drive sprocket 21 rigidly connected to the shaft 7. The spring 17 is pre-tightened with a nut 22, and the spring 18 is using nuts 23. Under the nuts 22 and 23, washers 24 and 25 are installed. The bulldozer operates as follows. The working body consisting of the blade 1 and the screw 2 is lowered onto the ground in the working position, and includes the hydraulic motor of the auger drive and the working gear of the base tractor. The cutting elements of the ijpH auger interacting with the ground cause a periodic change in the axial force acting on the augers, resulting in axial oscillations of the auger due to the deformation of one of the springs, depending on the direction of rotation of the auger shaft. Thus, the use of interchangeable cutting elements alternating with safety elements in combination with a spring-loaded screw shaft in the screw design allows axial oscillations of the latter without the use of a vibrator for this purpose, which leads to a simplification of the design of the bulldozer as a whole. The invention includes a bulldozer, including a base tractor, pushes bars, a blade installed in front of the blade in sub-support supports with covers, a screw auger on the shaft with a spur spring-loaded along the longitudinal axis and a drive sprocket mounted on the auger shaft, characterized in that in order to simplify it designs by communicating axial vibrations to the screw without using a vibrator, the screw is equipped with interchangeable cutting elements mounted on the screw surface of the screw at regular intervals, while the spring assembly of the shaft is placed n thereon with the driving side and is made of two springs, each of which raspolozhona kryschkami between one of the bearings and end respectively drive sprocket collar and the shaft. Sources of information taken into account in the examination 1. US Patent No. 3362092, cl. 37-144, 1968. 2. USSR author's certificate for application number 2918826 / 29-03, cl. E-02 F 3/76, 30.04.80. 11 2 389 a.f BuBA 7 17 18 (Puz.2 5 23.2