SU906730A1 - Apparatus for measuring air pressure in pneumatic tyres - Google Patents

Description

(54) DEVICE FOR MEASURING AIR PRESSURE IN PNEUMATIC TIRES

one

The invention relates to garage equipment for servicing pneumatic tires of vehicles, in particular, devices for measuring air pressure therefor.

A device for measuring air pressure in pneumatic tires according to the magnitude of their deformation is known, which contains a guide rod with an emphasis and a measuring mechanism.

The disadvantages of this device are low productivity and poor measurement accuracy. These drawbacks are associated with the fact that the wheel rim surface is used as the reference surface, and the tire pressure is determined by the difference between the values of the nominal free radius and the static radius under load.

The purpose of the invention is to increase the labor efficiency and increase measurement accuracy.

This goal is achieved by the fact that the measuring mechanism of the device is made in the form of a slider on the guide rod, the stop is made in the form of a fixed jaw with a working surface facing the measuring mechanism, on the slider of which two independently spring-loaded sleeves are placed, one of them has a nonius. the other, a reading device, each of these bushings is provided with a stop in the B1 of the movable jaw, the stops are located in the plane of the fixed jaw and are directed in opposite directions, and the distance between their working surfaces and equal to the height nepodv1 zhnoy sponge. The guide rod is made with a nonius.

Claims (2)

FIG. 1 shows the instrument, a general view, for measuring the deformed diameter of the tire; in fig. 2 - the same, in case of sticking of non-deformers. FIG. 3 shows section A-A in FIG. 2 (measuring device NioxaiuiCM). The device for measuring air pressure in a tire according to its deformation comprises a guide rod 1 with a Vernius 2, which is used to tune the device to the measured tire size, a fixed 3 fixed on it, and a measuring mechanism in the form of moving along the guide rail 1 of the slider 4 fixed on it with the help of the nut 5. The slider carries a concentrically located movable ha-street 6 with a nonius 7, a measuring stop 8 and a locking screw 9. In the initial position the spring 10 presses the movable sleeve 6 to the collar of the slide 4. Concentric to the sleeve 6 is a movable sleeve 11 with a reading device 12 and a measuring stop 13. The spring 14 presses the movable sleeve 11 to the collar of the sleeve 6. Measuring controls 8 and 13 are located in the same plane with the stop 3 and are directed to opposite at the same time, their working surfaces in the initial position have a drop equal to the height of the fixed support 3, and are directed toward the latter; Supports 8 and 13 form movable jaws of the device. For orientation of the measuring mechanism relative to the fixed stop 3, a pin 15 is pressed into the movable sleeve 11, moving in the corresponding grooves of the second sleeve, the slider and the guide direction. The device works as follows. In the initial position, the movable sleeve 6 spring 1O is pressed against the shoulder of the slide 4, and the movable sleeve 11 spring 14 is pressed against the shoulder of sleeve 6. First, the deformed tire diameter is measured under load. For this, the slider 4, in accordance with divisions of the vernier 2, is fixed on the guide rod 1 in a position corresponding to the diameter of the deformed thickness, so that the distance from the working surface 8 to the back side of the fixed abutment 3 is less than the deformed diameter approximately equal to the difference between the deformed and non-deformed tire diameters. Then, supporting the working surface of the stop 8 on the highest point of the belt, move the guide rod with the slider 4 fixed on it until the back of the back of the stop 3 touches the support surface. After that, the sleeve 6 with the stop 8 not slide the slider 4 with the help of the stop screw 9, spring 10 schie this szha. Then, the undeformed diameter of the tire is measured under load, this is pulled away by the movable sleeve 11c in package 13, overcoming the spring of the spring 14, and the working surfaces of the movable 13 and stationary 3 stops are brought into contact with the diametrically opposite points of the tire. After that, using the readout device 12, using the Vernier 7, the difference between deformed and undefine Tire diameters is directly realized, according to Korqpoft, the value of the internal pressure in the tire is judged. The proposed schust, is convenient in operation and at the same time provides a rather high accuracy of measurements, allowing to automatically take into account the influence of wearing and wear of the fabric on its geometrical dimensions. Claim 1, A device for measuring air pressure in pneumatic tires according to its deformation, containing an accumulator rod with an opsf and measuring mechanism, characterized in that, in order to increase labor productivity and improve measurement accuracy, the measuring mechanism is made in the form of a slide On the other side, the stop is made in the form of a fixed sponge with a working surface, about a measuring device in the direction of the measuring mechanism, two independently mounted sleeves are placed on the slide, one of them has a noni And the other reading device, each of the sleeves is provided with NZ UPSF a movable jaw, UPSR are located in the plane of the fixed jaw and sent to hfotivopolozhnye hand, and the distance between their working Obey E equal to the height nepodvshknoy sponge 2. The instrument according to claim 1, except for the fact that the indexing rod is made with a nonius. Sources of information, green in attention during the examination 1. USSR author's certificate fe 2OI39, class, B 60 C 23 / O6, 1972, ( / cptiz. /