RU2590785C1 - Vehicle wheel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: present invention relates to wheels with pneumatic tires intended for wheeled vehicles including tractors, harvesters, excavators and other vehicles with springless suspensions. Wheel for transport applications contains a rim (1) and a pneumatic tire (2) mounted on it. Rim (1) has a built-in chamber (3) in the form of a continuous circular ledge at the outer contour. Built-in chamber (3) and tire cavity (2) are connected to each other through more than one valve-and-throttle assembly (4) located on the rim (1) inside the chamber (3). Valve-and-throttle units (4) are spaced from each other at the same distances along the circumference of the rim (1). Each valve-and-throttle assembly (4) has at least one valve and one orifice. There are filters to avoid clogging of the orifices and valve.

EFFECT: proposed wheel design ensures a uniform distribution of the mass throughout the entire volume of the wheel, which considerably reduces the dynamic unbalance of the wheel, increases the durability of rolling bearings used in the undercarriage, while maintaining the high anti-vibration properties of the wheel.

1 cl, 3 dwg

Description

The invention relates to wheel structures with pneumatic tires intended for vehicles, including tractors, combines, excavators and other vehicles with springless suspensions.

A vehicle wheel is known (AS No. 1452713, class B60C 17/00, publ. 23.01.1989) containing a rim, a pneumatic tire and an insert of elastic material located inside the tire and covering the rim, and the insert is made at least with at least one internal cavity and includes at least one inlet and one exhaust valve installed between the internal cavity of the insert and, accordingly, the external environment and the internal cavity of the tire.

The disadvantage of this wheel is its low vibration-protective properties, which arise due to the inability to provide effective damping of the vehicle’s vertical vibrations, which affects the smoothness and safety of traffic, reduces the speed, performance and other performance of a vehicle with springless suspensions.

Also known is the wheel of a vehicle described in the patent for invention RU No. 2108240, class. B60C 17/00, publ. 04/10/1998 (prototype), containing a rim and a pneumatic tire, in the cavity of which an elastic shell in the form of a hollow torus is installed with an annular gap, dividing the tire cavity into two cavities, forming an annular working cavity in the tire communicating with the inner cavity of the elastic shell through the valves, and the center of gravity of the elastic shell is located below the axis of rotation of the wheel, and the torus is truncated in the lower part and rests on the rim with the possibility of axial rotation, the volume of the annular working cavity is less than the volume of the inner elastic shell and They interconnect in addition to valves through throttling holes.

The presence in the lower part of the elastic shell of the dynamic torsional vibration damper in the form of toroidal sectors, the closed internal cavities of which are filled with liquid and partially metal balls, the location of the centers of the toroidal sectors below the axis of rotation of the wheel leads to an uneven distribution of mass over the volume of the wheel and, as a result, to dynamic imbalance wheels adversely affecting the operation of rolling bearings in the nodes of the vehicle chassis. To increase the reliability and durability of the rolling bearings in the nodes of the chassis, it is necessary to introduce additional measures (balancing masses on the wheel rim) that are not always effective under difficult operating conditions of the vehicle (heavy road conditions, driving on the road, the transportation of large masses of goods). The presence of an integral elastic shell reduces the possibilities for using such a system with integral structures of the rim of vehicles. In addition, the use of an elastic shell causes difficulties in mounting the tire on the wheel rim.

The technical result of the proposed vehicle wheel is to ensure uniform distribution of mass over the volume of the wheel, which significantly reduces the dynamic imbalance of the wheel, increases the durability of the rolling bearings in the nodes of the chassis of the vehicle. In this case, the vibration-proof properties of the wheel are maintained due to internal damping of vibrations.

The specified technical result is achieved by the fact that in the wheel of a vehicle containing a rim and a pneumatic tire, according to the invention, the rim has a built-in chamber in the form of a continuous annular protrusion along the outer contour, and the built-in chamber and the tire cavity communicate with each other through at least two valve throttle nodes located on the rim inside the chamber, and valve-throttle nodes spaced relative to each other at the same distance around the circumference of the rim.

Each valve-throttle assembly has at least one valve and one throttling hole.

The invention is illustrated by drawings, where

- in FIG. 1 shows a proposed wheel of a vehicle, a longitudinal section;

- in FIG. 2 - the proposed vehicle wheel, a transverse section (section aa in Fig. 1);

- in FIG. 3 - valve-throttle assembly (remote element B in Fig. 2).

The vehicle wheel comprises a rim 1 and a pneumatic tire 2 mounted on it. The rim 1 has a built-in chamber 3 in the form of an annular continuous protrusion along the outer contour. The built-in chamber 3 and the tire cavity 2 communicate with each other through more than one valve-throttle assembly 4 located on the rim 1 inside the chamber 3. The valve-throttle assemblies 4 are spaced relative to each other at equal distances around the circumference of the rim 1. Each valve-throttle assembly 4 has at least one valve 5 and one throttling hole 6. In FIG. 3 shows a design variant with one valve 5 and two throttling holes 6. To prevent clogging of the throttling holes 6 and valve 5, filters 7 are installed on the side of the internal cavity of the pneumatic tire 2.

The proposed vehicle wheel operates as follows.

When the wheel is rolling linearly on a flat road, the deformation of the lower part of the tire is constant, the volume of the annular working cavity of the tire does not change, and air does not flow through valve 5 and throttling holes 6 of the valve-throttle assemblies 4, as a result of which the operational characteristics of the rolling resistance coefficient of the wheel remain unchanged.

When the vehicle moves on rough roads, the lower part of the tire 2 is compressed and restored. When the lower part of the tire 2 is compressed at a low speed corresponding to the resonant vibrations of the vehicle, the volume of the annular working cavity of the tire 2 decreases and air flows from it through filters 7, throttling holes 6 and valve 5 of the valve-throttle assemblies 4 into the cavity of the built-in chamber 3 with a small resistance. When restoring the tire 2, the volume of the annular working cavity of the tire increases, the air pressure in it decreases, as a result of which air flows from the cavity of the built-in chamber 3 into the cavity of the tire 2 through the throttling holes 6 of the valve-throttle nodes 4 with high resistance, which significantly reduces the amplitudes of the resonant vibrations of the transport facilities. In this case, the air in the tire 2 heats up and transfers thermal energy through the rim 1 and tire 2 to the external environment.

When compressing the lower part of the tire 2 with a high speed corresponding to the resonant frequencies, the valve 5 of the valve-throttle nodes 4 is practically blocked due to their inertia. The flow of air through the throttling holes 6 of the valve-throttle nodes 4 is reduced, which improves the vibration-proof properties of the wheel, reduces heat dissipation in the tire and rolling losses.

Due to the fact that when compressing the lower part of the tire 2, air from the annular working cavity of the tire 2 flows into the cavity of the built-in chamber 3 through the valve 5 and the throttling holes 6 of the valve-throttle assemblies 4 with a small resistance, and when the tire 2 is restored, the air flows back through the throttling holes 6 valve-throttle nodes 4 with high resistance, with periodic fluctuations, the average air pressure in the tire 2 decreases, and the static deformation of the lower part of the tire increases slightly. This automatically increases the vibration damping efficiency and the stability of the contact of the wheel with the road.

The proposed design of the vehicle wheel having a rim with an integrated chamber along the outer contour with valve throttling units evenly spaced around the circumference of the rim inside the built-in chamber, leads to the center of gravity of the wheel structure coinciding with its axis of rotation, uniform distribution of mass over the volume of the wheel is ensured that during operation significantly reduces the dynamic imbalance of the wheel, increases the durability of the rolling bearings in the nodes of the chassis of the vehicle when saved and simultaneously increased vibration isolation properties of the wheel. Also, the absence of additional elements inside the tire facilitates mounting of the tire on the wheel rim.

Claims (2)

1. A vehicle wheel comprising a rim and a pneumatic tire, characterized in that the rim has a built-in chamber in the form of a continuous annular protrusion along the outer contour, wherein the built-in chamber and the tire cavity communicate with each other through more than one valve-throttle assembly located on the rim inside the chamber, and valve-throttle nodes are spaced relative to each other at the same distance around the circumference of the rim. 2. The vehicle wheel according to claim 1, characterized in that each valve-throttle assembly has at least one valve and one throttle opening.

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