SU1454488A1 - Apparatus for testing ski grease - Google Patents

Description

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 This invention relates to ski care accessories and can be used to test and select a ski ointment.

A device for testing ski ointment is known, comprising a hollow cylindrical body mounted on a vertical axis, rotatable with respect to each other, with weights and a spring-loaded drum with a support sleeve bearing the ski model, a ski model lock and an indicator device.

A disadvantage of the known device is the lack of accuracy of measurements during testing and selection

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ski waxes, as the device does not allow measurements with dynamic friction.

The aim of the invention is to improve the measurement accuracy.

This goal is achieved by the fact that the device for testing ski ointment contains a hollow cylindrical body mounted on a vertical axis with respect to each other with weights and a spring-loaded drum with a support sleeve bearing the ski model, a ski model lock and an indicator device, and it has a roller and ratchet, with the axis.

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the carrier body and the drum are hollow, and the roller is placed in the axle cavity, the lower end of the roller is rigidly connected to the drum, and the upper end is connected to the toothed wheel of the ratchet mechanism, while the body is slotted and the ratchet pawl is installed in the body slot.

In addition, the indicator device contains an arrow with divisions, having a longitudinal slot and a ball, and the upper part of the body has a spiral track, while the arrow is mounted on the upper end of the roller above the gear wheel, and the ball is placed in the spiral track and slotted arrow. The device may have a handle mounted on the housing by means of a wire ring.

FIG. 1 shows a device for testing ski salve, general view; FIG. 2 is the same longitudinal section; in fig. 3 - the same, top view; on ig. 4 shows a section A-A in FIG. on. 5-section BB in FIG. four.

A device for testing a ski ointment consists of a hollow cylindrical body 1 and a drum 2 mounted on a vertical axis 3, a roller 4 placed in it with full rotation relative to each other, bearings 5 and 6, spring 7, a support sleeve 8 carrying the ski model, made in the form of a replaceable screw 9, a ratchet mechanism with a gear wheel 10 and a pawl 11, a clamp 12 of the ski model and an indicator device consisting of page 13, a ball 14 and a spiral track 15. The case has imitation weights 16 inside , and outside - the handle 17 with count by 18.

Adhesion measurement of the selected m

The snow cover is produced in two modes: in the static friction mode and in the dynamic friction mode.

In the initial position of the device (Fig. 1), between the snow surface on the ski track and the ski model, there is a grip force determined by the properties of these surfaces and the pressure force generated by the weight of the device itself.

In the first mode, a ski model, made in the form of a removable cover 9, is installed on the drum 2, and

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is secured with a latch 12. The ratchet pawl 11 is shifted to a position corresponding to this mode.

The device is installed on the track and tightly pressed to the snow. Then the rotary knob 19 rotates the body, while the helical spring 7 creates a torque on the drum and, accordingly, on the model of the ski. Simultaneously with the rotation of the casing relative to the drum, the indicator device raises the value of the twist angle. The housing is twisted until the spring torque exceeds the moment of resistance of the cover 9 with snow cover. In doing so, the drum, along with the arrow 13, rotates in the same direction as the body. One However, at the moment of breakdown, the casing and the drum remain stationary, since their relative movement 5 relative to each other is prevented by the ratchet pawl.

Indicator device produces the result as follows.

As the housing 1 rotates with the scale P 20, the ball 14 moves along the longitudinal groove of the arrow along the spiral groove by an amount proportional to the twist angle.

To average the readings, the measurements in the first measurement mode are repeated several times. For this, the device is lifted above the track and the switch 21 pulls the pawl 11 out of engagement with the gear wheel 10.

At the same time the scale of the case is automatically 0

returns to the starting position.

Next, proceed to the second measurement mode. To do this, the device is lifted above the ski track and the body 19 is tightened with the handle 19 approximately 720, and the dog is moved to the position corresponding to the first mode. Then the device is installed. wallowing on a ski run and ratchet dog

0 of the mechanism is shifted to the position corresponding to the second measurement mode, and the device body is locked. Under the action of the torque of the yarn, the drum starts to rotate, which will continue the more, the smaller the dynamic coefficient of friction that occurs between the test surfaces. When the drum is stopped

the arrow connected with it stops at a certain division of the scale 20 of the body, and the ball between the divisions into the slots of the arrow 13. The reading is taken and the counting is recorded in the table. For repeated measurements, the preparation cycle of the device is similar to that described.

After measurements with one ski model (type, lubricant), measurements are taken with another model (type of lubricant), for this purpose, another replaceable gear is installed on the drum i. The measurement cycle is repeated.

The device provides the ability to change the specific pressure depending on the weight of the skier and the bearing surface of his skis.

To do this, put the required amount of simulation goods 16 in the cavity of the housing 1.

Measurements are made in the number of divisions of the scale, and knowledge of the price of divisions is not required, since comparative evaluation is important for a number of test ointments.

The ability to make measurements in two modes allows you to select and simultaneously apply a lubricant to the skis that works well for both grip and slip, and improves the accuracy of measuring the slip and grip characteristics of ski ointments.

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Editor N.Gorvat

Compiled by N. Volodin

TehredL.Oliynyk Proofreader V. But ha

Order 7377/12

Circulation 372

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and printing company, Uzhgorod, st. Project, 4

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Claims (1)

1. TEST DEVICE- NII SKI OASIS containing a hollow cylindrical body with loads and a spring-loaded drum with a support sleeve carrying a prototype of a ski-mounted on a vertical axis with the possibility of rotation relative to each other. the ski protector and indicator device, and so on, in order to increase the accuracy of measurements, it has a roller and a ratchet mechanism, while the axle supporting the housing and the drum