SU1314157A1 - Pressure transducer - Google Patents

Abstract

Invention m. used in hydraulic presses. The purpose of the invention is to expand the functionality of the converter by providing various cyclograms of the consumer. For this, the kinematic connection of the rods 10 and 11 of the two hydraulic cylinders (HZ) 1 and 2 of the three is complete with the possibility of changing the transmission ratio, all the HZ 1,2,3 being placed in a common housing. Kinematic Relationship m. made in the form of a cam mechanism interacting with the pusher of the third HZ, in the form of a rack and pinion gear with a cam, a lever-hinge mechanism or a gear-rack drive with a hinge. This makes it possible to obtain various laws of variation of the multiplier factor. of 4 hp f-ly, 4 ill. с 3 (Л с. ел 1р4 /. ff

Description

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The invention relates to hydraulic actuators, namely to hydraulic drives of presses.

The purpose of the invention is to expand the functionality

FIG. 1 shows a gage transducer with a kinematic coupling in the form of a cam mechanism; in fig. 2 - the same, in the form of a rack and pinion gear; in fig. 3 / same, in the form of a hinge mechanism; in fig. And - the same, in the form of a rack-and-pinion transmission and a hinge mechanism.

The pressure transducer consists of three hydraulic cylinders of 1-3 different diameters with supports 4-6. Pistons 7-9 and rods 10–12 cylinders 1–3 are placed in them with the formation of piston 13–15 and rod 16–18 cavities. Piston cavities 13-15 are communicated by hydrolines 19-21 directly between themselves and with the consumer 22. The rod end cavities 16 and 17 of the first 1 and second 2 cylinders communicate alternately with the power source 23.

The rods 10 and 11 of the first 1 and second 2 cylinders in the first and third variants are rigidly connected to each other, and in the second and third variants - through a gear rack and pinion gear, the rails 24 and 25 of which are rigidly connected with the rods 10 and 11, and between a cog wheel 26.

The rod 12 of the third 3 cylinder is equipped with a roller 27, an interacting linear profile of the cam 28 in the first embodiment and a curved 29 in the second embodiment. The cam 28 in the first embodiment is rigidly connected with the rods 10 and 11, and in the second embodiment, the cam 29 is mounted on a common axis 30 with the gear wheel 26.

The rod 12 is connected in the third version via the Hinge 31 to the rods 10 and 11, and in the fourth version to one of them.

The third cylinder 3 in the third and fourth embodiments is equipped with a hinge 32 associated with a support 6, having the ability to move in two mutually perpendicular directions.

The pressure transmitter operates as follows.

Starting position: cavity volume 16 is minimal.

ABOUT -

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From the power source 23, pressure is applied to the rod cavity 16, while the rod cavity 17 is in communication with the drain. When the movement of the piston 7 piston

8 moves in the same direction (options 1 and 3) or in the opposite direction (options 2 and 4). With this pistons

9 moves in the direction of decreasing the volume of the cavity 15. The working fluid is displaced from the cavities 13 and 15 to the consumer and partially into the cavity 14. The pressure transducer during this period operates with a constant multiplication factor at 90 oi,

 const in the first and second variants and with a variable multiplication factor with oi, var in the first and second variants and in the third and fourth variants. When entering the cam section in the first and second versions with 6, О, the multiplication factor becomes again constant (but of a different size). Upon further movement (90, const for the first and second variants) the multiplication factor changes again, but has a third value, when passing through the point oi O in the third and fourth variants, the multiplication factor changes according to a different law. I

By changing the angles and lengths of the sections of the cam profiles 28 and 29 or by moving the hinge 32 relative to the support 6, various laws of variation of the multiplication coefficient and can be obtained. therefore, to provide various cyclograms of the consumer.

Claims (5)

1. A pressure transducer containing three stationary hydraulic cylinders of different diameters, pistons with rods placed in cylinders to form piston and rod cavities, a source of pressure and a consumer, with the piston cavities of all cylinders communicating with each other and with the consumer, rod cavities of the first and The second cylinders are connected to a pressure source with the possibility of alternately communicating with the latter, and the rods of all the cylinders are rigidly connected to each other, characterized in that, in order to expand the functional POSSIBILITY, linkage rods of the hydraulic cylinders vtolnena kinematic, and the cylinders are arranged in a common housing, wherein the kinematic linkage of at least two rods, with vtolnena varying transmission ratio. 2, The converter according to claim 1, wherein the kinematic connection is made in the form of a cam mechanism, the cam of which is made straight and mounted on the rods of the first and second cylinders rigidly connected to each other, and the rod of the third cylinder is equipped with a pusher interacting with the cam. 3. A transducer according to claim 1, characterized in that the kinematic link is made in the form of a rack and pinion gear, the racks of which are rigidly connected with the rods of the first and second cylinders. figure 1 the wheel is mounted on an axis fixed in the housing, while the axis is provided with a cam with a curvilinear profile interacting with the rod of the third cylinder. 4. A transducer according to claim 1, characterized in that the kinematic connection is made in the form of a lever-hinge mechanism, the hinge which is mounted on rigidly interconnected rods of the first and second cylinders with the ability to interact with the hinge bearing made on the rod of the third cylinder, while the latter is pivotally mounted in the housing. 5. The converter according to claim 4, characterized in that the kinematic connection of the rods of the first and The second cylinder is made in the form of a gear-rack and pinion, and the hinge is mounted on the rod of the second cylinder. L // p / jj7 / 19 22 " Fig.Z