RU131147U1 - DEVICE FOR MEASURING LINEAR MOVEMENTS - Google Patents

Abstract

1. A device for measuring linear displacements, comprising a composite housing in which a protective sleeve is installed and an inner wall is made, an angle measuring transducer with a pulley mounted on the inner wall, a winding device fixed on the inner wall and containing a winding coil, a bearing assembly, a shaft with a rotary axis of rotation, a spiral flat spring, and a cable for kinematic connection of the pulley with the winding coil, paired with a protective collar and made with a hook at its end for communication with measurement object, characterized in that between the pulley and the winding coil on the inner wall of the composite housing is fixed a bracket made with a cable guide located coaxially with a protective sleeve, and on the winding coil from the side of the inner wall there is a face cam that can be contacted with an additional introduced roller located on the inner wall and made with an axis crossing the winding device and located perpendicular to the axis of the winding device in It bore winding coil which is formed a longitudinal groove for guiding the tongue, fixed on a shaft which is mounted coaxially to the closing spring constant mechanical contact with the cam rolikom.2. The device according to claim 1, characterized in that the cable guide in the bracket has a spherical shape.

Description

The utility model relates to measuring technique and can be used to control the linear dimensions of metal profiles, displacements of various actuators, measure the deflections of building structures, during deformation of operating products.

A known deflection meter containing a drive mechanism with a flexible rod connected to the measuring object, an inductive sensor mounted on the drive mechanism, and recording equipment located in the operator, SU No. 823482 A1, E01C 23/07, 04/23/1981.

The range of operation of this device is limited by the range of operation of the inductive sensor, which is units of millimeters, which reduces its operational capabilities.

A known linear displacement transducer comprising a displacement meter, a recording device, a transmission mechanism including a traction element interacting with the measurement object, SU No. 926145 A1, E01C 23/07, 05/07/1982.

In the known linear displacement transducer, the measurement value is fixed by a recording device and the measurement results are processed by mathematical calculation, which complicates the process of measuring and obtaining the results of displacement and deflection of structures.

Known measuring angle Converter, made in the form of a magnetic angle Converter, RU No. 72320 U1, G01B 7/30, H01L 43/04, 04/10/2008.

The known Converter can be used as part of a device for measuring linear displacements.

A known deflection meter, including a composite housing containing the front and rear walls, with a displacement meter therein with a rotary axis of rotation mounted in the bearings, a power source and a recording device in the form of a processing board with a display and control buttons located on the front wall of the composite housing, a cable with a locking element in the form of a weight attached to it, interacting with the measurement object, and a pulley placed on the side of the rear wall of the composite housing and covered by a cable, RU No. 58554 U1 E01C 23/07, 11/27. 2006.

In the specified device, the linear movement of the cable is converted into an electrical signal.

The cable in the known device is structurally not included in the volume of the displacement transducer, this reduces the compactness of the structure, and the presence of a weight in the device additionally increases its weight and dimensions.

The use of cam movements in the form of a face cam in the structural elements of converters is known. The Precision Instrument Designer Handbook edited by K.N. Yavlensky, Leningrad, “Mechanical Engineering” 1989, S.244-245 Fig. 5.13, g.

Known electronic deflection meter containing a displacement meter in the form of a photoelectric angle transducer and a recording device located in one housing, a transmission mechanism including a traction element in the form of a cable interacting with the measurement object, RU No. 58555 U1, E01C 23/07, G01B 7/00 , Н03М 1/00, 11/27/2006.

Known electronic deflection meter, comprising a composite housing with a hole in the outer wall, an angle measuring transducer with a rotary axis of rotation, housed in a housing, a pulley mated to the axis of rotation, a bearing assembly, a coil spring, the plane of which is perpendicular to the rotational axis of rotation and the cable passing through hole and interacting with the measurement object, connected at one end with a pulley and having a hook on the other end for attachment to the measurement object, RU No. 60203 U1, G01B 7/00, Н03М 1/00, 10.01.2007.

In the known device, the winding coil is located on the axis of the measuring transducer, and when winding the cable onto the coil with each new row of windings, the diameter of the cable is wound, which leads to different measurements of the cable length and reduces the measurement accuracy the more, the more rows of cable laid on reel.

In addition, the measurement range in such a device is determined by the length of the cable, which is limited by the capacity of the winding coil and the dimensions of the device, which reduces its operational capabilities.

A known deflection meter comprising a housing made integral with front and rear walls, a rotary axis of rotation mounted in bearings located on the rear wall of the housing, a pulley mounted on a rotary axis of rotation, located outside the housing and covered by a cable with a locking element, a displacement meter in in the form of a converter with an integrated coupling and a hollow shaft, located in the housing, mounted on a cylindrical protrusion and connected with a rotary axis of rotation, an internal power source, external power connectors communications and with a personal computer, recording device, RU No. 61727 U1, E01C 23/07, 03/10/2007.

A known linear displacement transducer, including a composite housing in which a protective sleeve is installed and an inner wall is made, an angle measuring transducer with a pulley mounted on the inner wall, a winding device comprising a winding coil, a bearing assembly, a shaft with a rotary axis of rotation, a coil spring mounted on the inner wall, and a cable for kinematic connection of the pulley with the winding coil, paired with a protective cuff and made with a hook at its end for communication with measurement object, RU No. 92174 U1, G01B 7/00, Н03М 1/00, 03/10/2010.

This technical solution is taken as the closest analogue of this utility model.

In the known device of the closest analogue, during operation, the cable on the winding coil is randomly stacked, while the capacity of the winding device is reduced, which leads to a decrease in the range of operation of the device and the limitation of its operational capabilities.

The basis of this utility model is the solution to a problem that allows you to increase the range of the device, increase and expand its operational capabilities.

The technical result of this utility model is to increase the cable laying density in the winding device due to the fact that an end cam is made at the end of the winding coil from the side of the inner wall, which interacts with the additionally introduced roller located on the inner wall of the housing, and due to the introduction into the winding the device of the guide key, interacting with the groove, which is made in the inner hole of the winding coil, providing its reciprocating movement for laying cable.

According to a utility model, this problem is solved due to the fact that the device for measuring linear displacements includes a composite case in which a protective cuff is installed and an inner wall is made, an angle measuring transducer with a pulley mounted on the inner wall, a winding device fixed on the inner wall and containing a winding coil, a bearing assembly, a shaft with a rotary axis of rotation, a spiral flat spring, and a cable for kinematically connecting the pulley to the winding coil, paired with a protective th cuff and made with a hook at its end for communication with the measurement object.

An arm is fixed between the pulley and the winding coil on the inner wall of the composite housing. The bracket is made with a guide for the cable. The cable guide is aligned with the protective sleeve.

An end cam is made on the winding reel from the side of the inner wall. The end cam has the ability to contact an additionally inserted roller. The roller is located on the inner wall and is made with an axis crossing the winding device and is perpendicular to the axis of the winding device.

A longitudinal groove for the guide key is made in the inner hole of the winding coil of the winding device. The guide key is mounted on the shaft. A locking spring is installed coaxially with the shaft for constant contact of the end cam with the roller.

In addition, the cable guide in the bracket has a spherical shape.

The applicant has not identified sources containing information on technical solutions identical to this utility model, which allows us to conclude that it meets the criterion of "novelty."

The essence of the utility model is illustrated by drawings, which depict:

figure 1 - a device for measuring linear displacements, section;

figure 2 - winding device, section;

figure 3 is a section aa in figure 1;

figure 4 - node B in figure 1;

figure 5 - node In figure 1.

A device for measuring linear displacements contains:

Composite building - 1,

inner wall (in case 1) - 2.

Angle measuring transducer (mounted on the wall 2) - 3,

a shaft with a rotary axis of rotation (converter 3) - 4,

pulley (on shaft 4) - 5.

Winding device (mounted on wall 2) - 6.

Bearing unit (devices 6) - 7,

a shaft with a rotary axis of rotation (node 7) - 8,

guide key (on shaft 8) - 9.

Wound reel (devices 6) - 10,

end cam (on coil 10) - 11,

inner hole (in coil 10) - 12,

groove (in hole 12 for key 9) - 13.

Spiral flat spring (devices 6) - 14.

The roller (in contact with the cam 11, mounted on the wall 2) - 15.

Closing spring (devices 6) - 16.

Bracket (between pulley 5 and coil 10, mounted on wall 2) -17,

guide (in bracket 17) - 18.

Cable (for pulley 5 and coil 10) - 19,

hook (on cable 19) - 20.

Protective sleeve (in housing 1 for cable 19) - 21.

Measurement Object 22.

A device for measuring linear displacements includes a composite housing 1, an angle transducer 3 with a pulley 5 on the shaft 4, a winder 6 with a bearing assembly 7 on the shaft 8 with a rotary axis of rotation, with a winding coil 10, with a coil spring 14, with a trailing spring 16 and the cable 19, which covers the pulley 5.

Inside the composite housing 1, an inner wall 2 is made on which an angle transducer 3, a winding device 6, an arm 17 are fixed.

The bracket 17 is installed between the pulley 5 and the winding reel 10 and is made with a guide 18 for the cable 19. The guide 18 is located coaxially with the protective collar 21. The protective collar 21 is installed in the housing 1.

The guide 18 in contact with the nose 19 has a spherical shape.

An end cam 11 is made on the winding coil 10 from the side of the inner wall 2, which has the ability to contact an additionally introduced roller 15. The roller 15 is located on the inner wall 2 and is made with an axis crossing the winding device 6 and located perpendicular to the axis of the winding device 6.

In the inner hole 12 of the winding reel 10, a longitudinal groove 13 is made for the guide key 9 mounted on the shaft 8. Coaxial to the shaft 8, a closing spring 16 is installed, which ensures constant contact of the end cam 11 with the roller 15.

The pulley 5 is kinematically connected via a cable 19 to a winding coil 10.

The cable 19 is paired with a protective sleeve 21 and is made with a hook 20 at its end for communication with the measurement object 22.

To provide power to the angle 3 measuring transducer and to communicate with a recording device, for example, a computer (not shown), a connector (shown conventionally) is used.

A device for measuring linear displacements performs the measurement as follows.

The housing 1 of the linear displacement transducer is fixed motionless relative to the measurement object 22. The end of the cable 19 by means of a hook 20 is fixed to the measurement object 22 and the linear displacement transducer is connected to a power source and a recording device (not shown). The tension of the cable 19 when securing it to the measurement object 22 is provided by a spiral flat spring 14.

When moving the measurement object 22, the position of the end of the cable 19 fixed on the measurement object 22 changes, while it passes into the hole of the guide 18 of the bracket 17, is wound on a winding coil 10 and is simultaneously laid on it. The operation of laying the cable 19 is due to the presence on the coil 10 of the end cam 11, which is in contact with the roller 15. In this case, when the coil 10 is rotated, it rotates and simultaneously moves along the guide key 9 installed along the axis of the shaft 8, which leads to laying the cable 19 on the winding coil 10.

Since the cable 19 covers the pulley 5, this leads to the angular rotation of the pulley 5 together with the shaft 4 of the measuring transducer of the angle 3, which converts the angular displacements of the shaft 4 into an electrical signal (proportional) corresponding to the magnitude of this rotation. Information about the movement of the object 22 through the communication connector and the transmission of information is transmitted to a recording device (not shown).

Ensuring tight laying of the cable 19 on the winding coil 10, by leading the winding key 9 into the winding device 6, which interacts with the groove 13, which is made in the inner hole 12 of the winding coil 10 and facilitates its reciprocating movement when laying the cable 19 allows you to increase the operating range devices and expand its operational capabilities.

The presence of the end cam 11 at the end of the winding reel 10 from the side of the inner wall 2 of the housing 1, the supply of the device with a roller 15 located on the inner wall 2, interacting with the end cam 11, the installation of a trailing spring 16, which makes the roller 15 contact with the end cam 11, provides a tight laying the cable 19 on the winding coil 10 and thereby increase the capacity of the winding coil 10, which also provides an increase in the range of the device.

The location of the guide key 9 parallel to the axis of the shaft 8 of the winding device 6 and ensuring its interaction with the groove 13 of the winding coil 10 provides for its simultaneous reciprocating movement of the winding coil 10 along the axis of the shaft 8 of the winding device 6 and laying of the cable 19 on the winding coil 10 throughout the range of its rectilinear movements, which extends the operational capabilities of the device.

The supply of the device with a bracket 17 with a guide for the cable 19 located between the pulley 5 and the winding coil 10 provides a strict orientation of the cable 19 relative to the protective sleeve 21 when it covers the pulley 5 on the shaft 4 of the transducer 3, thereby ensuring the same counts of movement of the cable at each revolution pulley 5, which ensures reproducibility and reliability of the converter.

The fastening of the bracket 17 on the inner wall 2 of the housing 1 simplifies the coaxial installation of the protective sleeve 21 and the guide 18 of the bracket 17, which combines a common housing 1, and provides the convenience of assembly of the device, and the implementation of the guide 18 of the bracket 17 of a spherical shape reduces friction and the possibility of jamming of the cable 19 in the guide 18, which increases the operational capabilities of the device.

The proposed device for measuring linear displacements was manufactured industrially at OJSC SKB IS, using it they control the lengths of accurate linear scales and metal profiles for optoelectronic linear transducers for machine tool and machine building, and also measure the deformations of a building structure in which a large-sized technological equipment, which determines, according to the applicant, its compliance with the criterion of "industrial applicability".

Claims (2)

1. A device for measuring linear displacements, comprising a composite housing in which a protective sleeve is installed and an inner wall is made, an angle measuring transducer with a pulley mounted on the inner wall, a winding device fixed on the inner wall and containing a winding coil, a bearing assembly, a shaft with a rotary axis of rotation, a spiral flat spring, and a cable for kinematic connection of the pulley with the winding coil, paired with a protective collar and made with a hook at its end for communication with measurement object, characterized in that between the pulley and the winding coil on the inner wall of the composite housing is fixed a bracket made with a cable guide located coaxially with a protective sleeve, and on the winding coil from the side of the inner wall there is a face cam that can be contacted with an additional introduced roller located on the inner wall and made with an axis crossing the winding device and located perpendicular to the axis of the winding device in It bore winding coil which is formed a longitudinal groove for guiding the tongue, fixed on a shaft which is mounted coaxially to the closing spring constant mechanical contact with the cam roller. 2. The device according to claim 1, characterized in that the cable guide in the bracket has a spherical shape.

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