UA142607U - FIELD BOARD PLOW - Google Patents

Abstract

The plow field consists of a metal plate and plastic parts, which are permanently rigidly fastened together by metal rods oriented in space in different directions relative to each other to prevent displacement of the plastic part relative to the metal part of the field board.

Description

The useful model belongs to the field of agricultural engineering, in particular, it concerns the details of the working organs of the plow and their restoration.

A well-known field board of the plow |1)|, which is made of steel. The main disadvantage is the high coefficient of friction of the soil-steel couple, which leads to an increase in the necessary traction force during plowing, a relatively low resource, and the impossibility of restoring the field board.

A well-known field plow board, consisting of a metal base and a plate made of plastic

Tekron, which is produced by the IOSotrob5ye company (Mykolaiv). The disadvantage is the unreliability of the attachment and the small number of places for attaching the plastic plate to the metal base, due to which the soil in the process of plowing falls into the space between the metal base and the plastic plate, which leads to deformation of the plastic plate and its separation during operation.

The basis of the useful model is the task of creating such a design of the field board, which reduces the necessary traction force and allows it to be quickly repaired; creating a field board design that combines the hardness and rigidity of a steel field board and the low adhesion of a board with a plastic insert plate and at the same time has a reliable connection of the metal base to the plastic part of the field board.

The task is solved by the fact that in the field board of the plow, which consists of a metal plate and a plastic part, according to a useful model, the metal base (plate) of the field board and the plastic part lining the metal base are rigidly connected to each other by metal fastening rods, and the fastening rods are in a different spatial orientation relative to the neighboring fastening rods (relative to each other). This part made of plastic has the form of a plate with a recess for a metal base and holes for attaching the field board to the plow. The metal base of the field board is a metal plate with holes for attaching the field board to the plow. Displacement of the plastic part is possible only in the direction along the axis of the rod. But since the rod fasteners are oriented in space in different directions and rigidly fixed, and the plastic part is a solid body, the shift does not occur. This achieves resistance to detachment and displacement of the plastic part relative to the metal base in different directions. With significant dominance of one direction of load on the plastic part, the direction of orientation of the rods can take this into account. Rod fasteners can be immersed in the mass of the plastic part both to the full depth and partially. Considering

Due to the difference in the properties of the material, the greater resistance of the plastic part to abrasion, for example, parts made of ultra-high molecular polyethylene (NVMPE) or composites based on it, steel rods will always be worn faster by the flow of abrasive soil material than the material of the part made of plastic, and therefore never will protrude above the plastic part and scratch something. The welded connection of the fastening rods and the metal base should be minimal

C5 is sufficient to reduce the thermal impact on the plastic part during installation.

The schematically proposed field board is shown in the drawing. The connection and fixation of the plastic part (1) with the metal base (2) is carried out with the help of several multidirectional metal fastening rods (3), which pass through the metal base and are immersed in the plastic part. The rods are attached to the metal base from its reverse side by means of welding or threaded connection.

The rod for fastening the plastic part in cross-section can be of any shape - circle, triangle, square, rectangle, etc. The thickness, length, spatial orientation, angle of inclination to the metal surface of the rod and the number of rods can be optimal for each specific case. The number and orientation of the rods in each location of the field board must correspond to the expected shear and separation loads and may be different.

The simplest and most common cross-sectional shape of a rod is a circle. But in some cases, with some variants of the load, the rods can have a rectangular shape to create a larger surface of contact between the metal of the rod and the plastic part in a certain direction.

The fastening rod for better fixation of the fastening of the plastic part in the parts immersed in the plastic part can have an external triangular thread on the cylindrical surface. In this case, the thread in the plastic part can be cut both beforehand and during the insertion of the rod according to the self-tapping principle. If there is a thread, the head of the fastening rod must provide for the possibility of turning it for screwing with a key or a screwdriver.

After screwing, the rod can be fixed with a welded joint on a metal base.

The depth of immersion of the rod in the plastic must be sufficient to fasten the plastic part to perform its function. The exit of the drill from the plastic mass during installation (through hole) is permissible, as it has little effect on the functionality of the product.

Rod fasteners in the field board can be wound both from the outside of the metal base and from the outside of the plastic part.

Holes in the metal base can be made both before the installation of the plastic part and during the installation process.

The restoration of the field board is done by removing the worn plastic part, cleaning the remnants of the fastening rods and installing a new plastic part on the old metal base. The metal base can be used multiple times.

In fact, the plastic part performs the functions of lining the metal part with plastic with low adhesion and more resistant to abrasive wear than the metal of the part, that is, it is a lining in relation to the metal plate.

The useful model is illustrated by a drawing that schematically shows the fixation of the field board elements, where: 1 - plastic part (detail) of the field board; 2 - metal base (plate) of the field board;

C is a metal fixing rod.

Source of information: 1. Agricultural machines. Textbook /O.M. Karpenko, V.M. Khalanskyi. - M.: Kolos, 1983. - P. 34.

Claims (4)

USEFUL MODEL FORMULA 1. The field board of the plow, consisting of a metal plate and a plastic part, which is distinguished by the fact that the metal plate of the field board and the plastic part are permanently rigidly fastened together with metal rods oriented in space in different directions relative to each other to exclude the part from shifting from plastic in relation to the metal part of the field board. 2. The field board of the plow according to claim 1, which differs in that the metal connecting rod has an external thread. C. The field board of the plow according to any of claims 1, 2, which is characterized by the fact that the metal connecting rod has on its end a head for a wrench or a slot for a screwdriver. 4. The field board of the plow according to any of claims 1-3, which is characterized by the fact that the metal rod, which fastens, has the properties of a screw for applying an internal thread in a plastic plate. from 1. kash i Ky A x Ki sh m LJ