SK112015U1 - Extending spike device for improvement traction properties of wheels - Google Patents

Abstract

The equipment described does not have to be removed from the tractor when traveling on paved roads and roads and can be folded back into the transport position by a short ride back. The tines (3) extend only when the tractor slips and when sliding, the tapered tips engage the slower moving substrate, which then moves all the tines (3) over the entire circumference of the tire (5) through the control cable (4). A control cable (4) is located on the outside and inside of the tire side (5), on which symmetrically produced control levers (2) are fixed by means of pins (8). On the wheel disc (1) there are locations for gripping the control cable (4) to fix the set position of the control levers (2) in the folded or extended position.

Description

Technical field

The pull-out spike to improve wheel traction is designed for tires with a suitable tread pattern. In the active state of the device, increased tensile forces under the wheel can increase tensile force on a flexible backing, thus reducing slippage and fuel consumption, improving directional stability and also suppressing the soil when applying tensile force. It is not necessary to remove the device from the wheel when moving it on a solid support. After unlocking, the spikes are automatically extended by the wheel slip and are retracted briefly backwards while remaining retracted until the next wheel slip.

BACKGROUND OF THE INVENTION

Currently used standard tires for trucks, buses, construction and earthmoving machinery, self-propelled agricultural machinery, off-road and other vehicles under worsened driving conditions increase wheel slip, reducing tensile strength, stability, increasing pad compression, fuel consumption and tire wear. The grip is influenced by the characteristics of the tire, such as its profile, tread shape, compound composition, wear rate or inflation.

Various devices are currently used to improve traction, but need to be mounted in degraded traction conditions and dismantled in conditions where they would damage the road. Examples of such devices are traction chains or stud tires. There are solutions with automatic operation, such as studded tires with retractable studs, but which are not effective on a substrate with a lower stiffness (eg snow, soil, etc.).

Other, only some vehicles useful for improving wheel engagement are, for example, the use of additional weights or variable tire inflation, which, however, increases fuel consumption and padding, respectively. it is costly, time and energy inefficient and reduces tire life.

The proposed retractable spike device reduces slip and improves grip and stability, thereby increasing machine efficiency and reducing unwanted environmental impacts.

The essence of the technical solution

The retractable spike device for improving the gripping properties of the wheels essentially works by increasing the cohesive forces between the tire and the flexible backing. At work when the device is in the unlocked state i.e. if the control cable is unlocked from the wheel disc by erecting the spikes, we can increase the tensile force of the machine on the flexible backing by means of increased cohesive forces.

The principle is that when the wheels on which the machine is mounted get engaged and slip, all studs are automatically ejected from the tire using the control cable. When fully engaged, the spikes are supported by the control levers in the control cable, preventing them from twisting to the opposite side due to the force exerted on them. The whole mechanism is held by a clamping cable, which distributes the stresses evenly throughout the device, thus preventing the device from turning over against the wheel. The change of the position from the extended to the retracted is ensured by the pivotal attachment of the cable by means of pins to the control levers. By using studs that project above the tire, the drive wheel engagement force is increased, thereby reducing skidding and thereby significantly reducing skidding performance losses and increasing overall tensile force, speed and stability.

Upon completion of the work, the spikes are pushed into the grooves in the tire due to the machine's reverse travel, secured by clamping the control cable to the wheel disc, and the machine can then be moved on paved roads.

Overview of the figures in the drawing

The withdrawable spike device of Fig. 1 is shown in a 3D perspective view in the extended state; 2 shows the device in a 3D view in the retracted state, and FIG. 3 is a 3D view of a modified tread pattern of a Barum 6,15 / 155-R14-4PR tractor wheel.

Example

The proposed technical solution shown in FIG. 1, 2 is intended for all types of wheeled running gear. The equipment was verified on the MT8-070 MINI traction drive wheel. It consists of a system of control levers 2 with prongs 3, which are an essential part of the entire device. The stud system is connected by two elements of the control cable 4 and the clamping cable 7. On the modified tire 5 with grooves 6 located on the disc 1 according to FIG. 3, the support and control levers 2 are held in the tire body 5 by means of the clamping cable 7. Furthermore, for controlling the extension of the spikes 3, the control and securing cable 4 must be rotatably mounted on pins 8 by which the spikes 3 are actuated in two extreme positions. At the same time, the cable 4 also serves to adjust the limit stop of the extrusion position (fig.

1) and insertion (FIG. 2) of the prongs 3 into the perpendicular and / or perpendicular, respectively. horizontal position with respect to the axis of rotation of the wheel.

In FIG. 3 shows a modified mini-tractor wheel MINI-070.

Industrial usability

The method of improving the transmission efficiency of the wheel drive force on a flexible backing is applicable to almost all types of machines with wheeled gears. The device can be mounted on any wheel equipped with an elastic tread. Said technical solution would not need to use means to increase the engagement properties with the necessity of disassembly. When actuating the device it is sufficient to unlock the control cable on the side of the wheel disc and it will automatically activate when the wheel slips. Upon completion of the need, i.e., to improve the engagement conditions of the drive wheels, the device is retracted briefly backwards and is retracted until the subsequent slipping of the drive wheels. The device increases the maximum tensile force on the compliant mat and also reduces fuel consumption and increases the speed of movement of the wheeled vehicle on the compliant mat while improving longitudinal and lateral stability of the vehicle. In the basic retracted and locked position, the spikes do not come into contact with the washer and therefore the vehicle equipped with the retractable spike control can move on the road without damaging them.

Claims (3)

Pull-out spike device for improving the engagement characteristics of wheels, characterized in that the spikes (3) mounted on the control levers (2) on the wheel periphery are connected by a control cable (4) rotatably mounted in the pins (8). Pull-out spike arrangement for improving the engagement properties of wheels according to claim 1, characterized in that the control levers (2) with spikes (3) are mounted in the grooves (6) formed in the tire (5). Retractable spike device for improving the engagement properties of wheels according to claim 2, characterized in that the control levers (2) with spikes (3) are secured by means of a clamping cable (7).