CN218994250U - Auxiliary device for measuring step - Google Patents

Abstract

The utility model relates to an auxiliary device for measuring a step difference, which comprises a measuring rod, a measuring rod and a measuring rod, wherein the measuring rod can be elastically and telescopically arranged at the front end of a bracket body along the vertical direction, and scales are arranged on the measuring rod; a bottom plate fixed on the bottom surface of the rear end of the bracket body; the measuring rod and the bottom plate are respectively contacted with two surfaces with different heights of the measured piece to form a step difference measuring structure; the device also comprises a locking mechanism and an extension mechanism. The beneficial effects achieved by the utility model are as follows: the device has the advantages of low cost, simple structure, convenient measurement by extending into a position to be measured, reading after measurement, light wave detection and traditional mechanical instrument detection, and suitability for step difference measurement in a space limited area.

Description

Auxiliary device for measuring step

Technical Field

The utility model relates to the technical field of airplane equipment detection, in particular to an auxiliary device for measuring a step difference.

Background

At present, after the butt joint installation of the aircraft engine and the annular bulk device is finished, the height difference, namely the step difference, exists between the cylindrical inner walls of the aircraft engine and the annular bulk device; when the installation is completed, the step difference needs to be detected. At present, the measuring means are various, and more common are: the light wave detection mainly utilizes two groups of light with different wavelengths to act on a detection surface respectively, and the difference value is calculated by detecting the reflection time difference of the two groups of light with different wavelengths after the light is received by a filter; the embedded detection device is mainly used for detecting by embedding the base and the sliding component into each other and respectively contacting the lower surfaces of the two components with a detected surface, or marking scales on the sliding component or reading in a dial indicator mode; the sensor is used for detecting, and the sensor electrode and the detected target are mainly adopted to form two pole pieces of a capacitor, and the accurate detection of the step difference can be realized through signal processing.

Although these detection devices are capable of performing some data detection, there are also some technical problems, such as: (1) The light wave/sensor device detects, and has the advantages of high precision, complex equipment structure and high overall cost; (2) Rely on traditional mechanical instrument to detect, for example embedded detection device, the benefit is with low costs, and the shortcoming is because the space of detection department is limited, needs the hand to stretch into the detection to the first unable reading of stretching into after the measurement is accomplished, the condition of reading error very easily appears.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, provides an auxiliary device for measuring the step difference, solves the problem of high detection cost of the light wave/sensor, and solves the problems that the traditional mechanical instrument is inconvenient to measure and the reading after measurement is easy to make mistakes.

(one)

The aim of the utility model is achieved by the following technical scheme: the auxiliary device for measuring the step difference comprises a measuring rod and a bottom plate;

the measuring rod can be elastically and telescopically arranged at the front end of the bracket body along the vertical direction, and is provided with scales; a bottom plate fixed on the bottom surface of the rear end of the bracket body; the measuring rod and the bottom plate are respectively contacted with two surfaces with different heights of the measured piece to form a step difference measuring structure;

the device also comprises a locking mechanism, wherein the locking mechanism is sleeved at the front end of the bracket body and is connected with the measuring rod; when the front end of the locking mechanism is pressed, the locking mechanism releases the locking of the measuring rod, and the measuring rod can move up and down; when the front end of the locking mechanism is not pressed, the measuring rod is locked by the locking mechanism and cannot be displaced in the vertical position.

In the scheme, a special step difference measuring structure is designed, and a measuring rod of the structure can be locked by a locking mechanism. When the front end of the locking mechanism is subjected to pressure, normal step measurement can be performed; when the front end of the locking mechanism is not pressed, the measuring rod is locked. The advantage of design like this is, when unclamping after the measurement, the position of measuring stick can not change, can take out whole auxiliary device from the position of awaiting measuring again the reading, need not to measure, the reading goes on simultaneously.

In an advantageous embodiment, the mounting structure of the measuring rod is designed. The front end part of the bracket body is divided into a placing cavity; the measuring rod is sleeved with a measuring spring and then is arranged in the placing cavity to form a structure capable of elastically stretching along the vertical direction; the two ends of the measuring rod extend out of the support body.

The mounting structure of the measuring rod is further designed. The placement cavity is formed in the bottom surface of the front end part of the bracket body from bottom to top and does not penetrate through the bracket body; the top wall of the placing cavity is provided with a through hole; the middle part of the measuring rod is provided with an annular bulge; the upper end part of the measuring rod is sleeved with a measuring spring, and two ends of the measuring spring respectively prop against the annular bulge and the top wall of the placing cavity. Namely, the specific mounting structure of the measuring rod is designed.

In an advantageous embodiment, the locking mechanism is further configured. The locking mechanism is elastically connected with the upper end and the lower end of the measuring rod; after the measuring rod measures, under the action of the elastic tension force of the locking mechanism, the elastic tension force in the horizontal direction is applied, so that the measuring rod cannot move up and down.

The locking mechanism is further designed: the locking mechanism comprises a contact block and two locking blocks; the front ends of the two locking blocks are respectively fixed on the upper surface and the lower surface of the contact block through connecting screws to form a whole; the rear end parts of the two locking blocks are respectively contacted with the upper surface and the lower surface of the bracket body; the rear end parts of the two locking blocks are separated by corresponding waist-shaped holes; the upper end and the lower end of the measuring rod extend out of the corresponding waist-shaped holes; and a compression spring is arranged between the contact block and the front end face of the bracket body. The locking principle is as follows: the compression spring applies elastic force to the contact block, and the contact block applies elastic tension to the measuring rod through the two locking blocks to prevent the measuring rod from moving in the up-down direction.

(II)

The device further comprises an extension mechanism based on the first step. The extension mechanism is arranged at the rear end of the bracket body and sends the whole auxiliary device for measuring the step difference to the step difference measuring position of the measured piece.

In an advantageous embodiment, the extension mechanism is designed to include a hinge base, a two-stage telescopic rod; the hinge seat is U-shaped, is forked on two sides of the rear end of the bracket body and is hinged through a beam pin; the two-stage telescopic rod is connected to the hinging seat.

In the first and second embodiments, the measuring part of the measured member is an arc, and the bottom surface is an arc adapted to the measured member; the part to be measured in this solution actually comprises two parts, namely the annular scattering device and the position to be measured formed by the corresponding barrel of the aircraft engine.

For ease of understanding, some core design points of the utility model, as well as the use cases, are described:

1. a specially designed step measuring structure and a locking mechanism;

when the aircraft engine is in butt joint with the annular device, the inner walls of the aircraft engine and the annular device are radially stepped (the height difference exists between the inner walls and the height difference exists in the axial/horizontal direction, but the scheme mainly measures the height difference between the inner walls); the conventional more accurate detection mode is light-wave inspection vehicle/sensor detection, but the detection cost is high; therefore, in practical conventional measurement, more mechanical measurement methods, such as an embedded detection device, etc., are adopted; when the mechanical measurement mode is adopted, as the space at the butt joint position of the engine and the annular bulk device is limited, only a human hand can extend into the annular bulk device to perform measurement, but the length of a human arm is limited, the human arm cannot necessarily extend into the position to be measured, or even if the hand can extend into the annular bulk device for measurement, the brain bag cannot extend into the reading, even if the reading is easy to read wrong, the mechanical measurement instrument is taken out after the measurement is finished, the reading is performed again, and the position of the scale on the scale is likely to change in the taking-out process, so that the reading is wrong;

the step difference measuring structure designed by the utility model (which is equivalent to a traditional mechanical measuring instrument) can lock the measuring rod after the measurement is completed; even if the number is read after the measurement is finished and taken out, the position of the measuring rod at the scale is not changed, so that accurate measurement is realized;

in addition, since other parts (such as the block in fig. 7) are also present at the interface of the aircraft engine and the annular device, when the whole auxiliary mechanism is extended, the locking mechanism at the end of the auxiliary mechanism is abutted against the corresponding block, if the auxiliary mechanism is continuously applied with inward force, the locking mechanism can be compressed, so that the locking mechanism can release the locking of the measuring rod; the measuring rod is propped against the inner wall of the engine under the action of elastic force, and the bottom surface of the bottom plate is contacted with the inner wall of the annular bulk device, so that the measurement of the step difference can be realized; when the measurement is completed, the whole auxiliary mechanism is gradually moved outwards along the axial direction, the locking mechanism is gradually separated from contact with the block piece, and the locking mechanism is used for locking the measuring rod again; then taking out the whole auxiliary mechanism completely, and reading again;

2. the design of the extension mechanism;

because the arm is not necessarily extended to the measuring place, the whole auxiliary mechanism is extended to the measuring place through the extension mechanism;

when the device works, the whole auxiliary mechanism is placed at the inner wall of the annular bulk device, the bottom surface of the bottom plate is contacted with the inner wall of the annular bulk device (at the moment, the measuring rod is locked after being pulled up), and then the whole auxiliary mechanism is gradually pushed inwards through the extension mechanism; when the measuring rod is initially sent to the measuring position, the front end of the locking mechanism is contacted with the block piece, a certain force is continuously applied forwards, the locking mechanism is compressed backwards, the locking mechanism is used for unlocking the measuring rod, and the measuring rod extends downwards to be contacted with the corresponding inner wall of the engine under the action of elastic force.

The utility model has the following advantages:

(1) By designing a special step difference measuring structure and locking the measured measuring rod through a locking mechanism, the measuring rod can be taken out and then read after the measurement is completed, and the relative position between the measuring rod and the bracket body cannot be changed in the taking-out process;

when the device is used for measuring the step difference between an aircraft engine and a ring scattering device, compared with the traditional mechanical instrument measurement, the device is less prone to error in reading and higher in measurement accuracy; compared with the light wave measurement/sensor measurement, the cost is lower; the advantages of both light wave/sensor measurement and traditional mechanical instrument measurement are achieved;

(2) The design mode of the locking mechanism is suitable for step difference measurement of the aircraft engine and the annular scattering device, namely, the front end of the locking mechanism is pressed to loosen the measuring rod in the previous pushing process, and the front end is not pressed to lock the measuring rod;

(3) The extension mechanism can send the whole auxiliary device to the measuring place, so that the measurement is convenient.

Drawings

FIG. 1 is a schematic view of a first view of the present utility model;

FIG. 2 is a schematic diagram of a second view of the present utility model;

FIG. 3 is an exploded view of the present utility model;

FIG. 4 is a schematic view of the placement between the present utility model and a measurement member;

FIG. 5 is a schematic view of the structure of the present utility model with two-stage telescoping rods;

FIG. 6 is a schematic cross-sectional view of the utility model measured with a measurement member;

FIG. 7 is a schematic cross-sectional view of an aircraft engine interfacing with a ring gear;

in the figure: the device comprises a 21-measured piece, a 22-bottom plate, a 24-bracket body, a 2401-placing cavity, a 2402-through hole, a 25-locking block, a 2501-waist-shaped hole, a 26-contact block, a 27-compression spring, a 28-measurement spring, a 29-measurement rod, a 2901-annular protrusion, a 30-hinging seat, a 31-two-stage telescopic rod and a 32-shaft pin.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings, but the scope of the present utility model is not limited to the following.

It should be noted that, the docking installation of the aircraft engine and the ring-shaped bulk device is equivalent to the docking of two barrels, as shown in fig. 7; an annular gap exists between the two parts in the axial direction and a step difference exists in the radial direction (the step difference is mainly detected in the scheme); and there are other components in the corresponding barrel of the aircraft engine (i.e. other components in the inboard position are measured, such as the block in fig. 7, this arrangement would be utilized by the present solution). Because of the high cost of measuring the step of the traditional light wave/sensor, the step of the measurement of the aircraft engine and the ring bulk device cannot be measured well by the traditional mechanical instrument. The following scheme is designed for this purpose.

Example one

When the step difference between the aircraft engine and the ring scattering device is measured, the space for the bulk installation of the engine and the ring is very limited. If the traditional mechanical instrument is used, the hand can only extend into the instrument for measurement, and when the traditional mechanical instrument is taken out for reading after the measurement is completed, the corresponding indicator needle can possibly displace on the scale, so that the reading accuracy is affected; or reading is carried out in the measuring process, but the eyes are at a certain distance from the to-be-measured position, so that inaccurate reading is easy to occur.

For the above problems, as shown in fig. 1 to 4, an auxiliary device for measuring a step is provided, including a bracket body 24; a measuring rod 29 which can vertically stretch and retract is arranged at the front end part of the bracket body 24, and scales are arranged on the measuring rod 29; a bottom plate 22 is fixed to the bottom surface of the rear end portion of the bracket body 24; forming a height difference between the lower end of the measuring rod 29 and the bottom surface of the bottom plate 22, and forming a step measuring structure by using the height difference;

in addition, a locking mechanism is also included, which is sleeved at the front end of the bracket body 24 and is connected with the measuring rod 29.

When the device works, the whole auxiliary device is placed on the inner wall of the annular bulk device, at the moment, the bottom surface of the bottom plate 22 is attached to the inner wall of the annular bulk device, and the whole auxiliary device is gradually pushed inwards; when the front end of the auxiliary device is propped against a part in a corresponding cylinder of the engine, the front end is obviously blocked, so that a position to be measured is reached; then continuing to apply force inwards to enable the front end of the locking mechanism to be subjected to backward pressure, so that the locking mechanism releases the locking of the measuring rod 29, the measuring rod 29 pops downwards under the action of self elastic force, and the lower end of the measuring rod 29 abuts against the inner wall of the corresponding cylinder of the aircraft engine; the height difference between the lower end of the measuring rod 29 and the bottom surface of the bottom plate 22 is equal to the step difference between the inner wall of the annular bulk device and the inner wall of the corresponding cylinder of the engine, so that the step difference can be measured; after the measurement is completed, the whole auxiliary device is slowly and gradually pulled outwards, so that the locking mechanism is separated from contact with parts in the corresponding cylinder of the engine, the front end of the locking mechanism is not stressed by the parts any more, and then the locking mechanism locks the measuring rod 29 after the measurement is completed again; the whole auxiliary device is then taken out and read.

Since the measuring rod 29 is locked after the measurement is completed, the measuring rod 29 does not change in vertical position during the taking out process, and the reading after the taking out is the same as the data actually measured, thereby ensuring the measurement accuracy.

In this embodiment, as shown in fig. 6, the mounting structure of the placement chamber 2401 and the measuring rod 29 is designed. The front end portion of the bracket body 24 is divided into a placement cavity 2401, the bottom surface of the placement cavity 2401 at the front end portion of the bracket body 24 is opened from bottom to top without penetrating the bracket body 24, and a through hole 2402 is opened at the top wall of the placement cavity 2401. The upper end part of the measuring rod 29 is sleeved with the measuring spring 28 and then is arranged in the placing cavity 2401, and the upper end of the measuring rod 29 penetrates out of the through hole 2402; the middle part of the measuring rod 29 is provided with an annular bulge 2901, and two ends of the measuring spring 28 respectively abut against the annular bulge 2901 and the top wall of the placing cavity 2401. And the upper and lower ends of the measuring rod 29 can be locked by the locking mechanism.

Due to the presence of the measuring spring 28, the measuring rod 29 can automatically pop downwards when it is locked.

In this embodiment, as shown in fig. 3, 4 and 6, the locking mechanism is designed. The tightening mechanism comprises a contact block 26 and two locking blocks 25. The rear end portions of the two lock blocks 25 are divided into waist-shaped holes 2501, the two lock blocks 25 are respectively attached to the upper and lower surfaces of the bracket body 24, and the upper and lower ends of the measuring rod 29 are respectively passed through the corresponding waist-shaped holes 2501. The front ends of the two locking blocks 25 extend out of the bracket body 24 forwards, and the front ends of the two locking blocks 25 are fixedly connected with the contact blocks 26 respectively; the contact block 26 is located at the front end of the support body 24 with a space therebetween, and a hold-down spring 27 is provided at the space, and both ends of the hold-down spring 27 respectively abut against the contact block 26 and the support body 24.

The locking mechanism has the working principle that: when the front end of the locking mechanism is not subjected to backward pressure, the contact block 26 is subjected to forward force exerted by the compression spring 27, and the contact block 26 exerts forward pulling force on the upper end and the lower end of the measuring rod 29 through the waist-shaped hole 2501 on the locking block 25, so that the locking of the measuring rod 29 is realized;

when the front end of the locking mechanism is pressed backwards, the contact block 26 and the locking block 25 overcome the pressure of the compression spring 27 and move backwards, so that the measuring rod 29 is not locked by the waist-shaped hole 2501, the measuring rod 29 moves downwards under the action of the measuring spring 28, and the end of the measuring rod 29 abuts against the wall of the corresponding inner cylinder of the engine.

As shown in fig. 4, the bottom surface of the bottom plate 22 is arc-shaped and is adapted to the measured member 21, where the measured member 21 includes a cylinder and a ring-shaped scattering device corresponding to the aircraft engine.

Example two

In the first embodiment, if the arm is unable to send the whole auxiliary device to the measurement position; on the basis of the first embodiment, an extension mechanism is also designed, which is installed at the rear end of the holder body 24, and which feeds the entire auxiliary device for measuring the step into the step measuring position of the measured piece 21.

Specifically, as shown in fig. 3 and 5, the extension mechanism includes a hinge base 30 and a two-stage telescopic rod 31; the hinge seat 30 is U-shaped, is forked on two sides of the rear end of the bracket body 24 and is hinged through the shaft pin 32; a two-stage telescopic rod 31 is connected to the hinge base 30.

The extension mechanism works: the two-stage telescopic rod 31 is held by hand to send the auxiliary device to the measuring place for measurement.

The foregoing examples represent only preferred embodiments, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the utility model, which falls within the scope of the utility model.

Claims (8)

1. A auxiliary device for measuring step, its characterized in that: comprising the following steps:

a measuring rod (29) which can be elastically and telescopically arranged at the front end of the bracket body (24) along the vertical direction and is provided with scales;

a bottom plate (22) fixed to the bottom surface of the rear end of the bracket body (24);

the measuring rod (29) and the bottom plate (22) are respectively contacted with two surfaces of the measured piece (21) with different heights to form a step difference measuring structure;

the device also comprises a locking mechanism which is sleeved at the front end of the bracket body (24) and is connected with the measuring rod (29);

when the front end of the locking mechanism is pressed, the locking mechanism releases the locking of the measuring rod (29), and the measuring rod (29) can move up and down; when the front end of the locking mechanism is not pressed, the measuring rod (29) is locked by the locking mechanism, and the vertical position displacement can not be carried out.

2. The auxiliary device for measuring a step as claimed in claim 1, wherein: the front end part of the bracket body (24) is divided into a placing cavity (2401);

the measuring rod (29) is sleeved with a measuring spring (28) and then is arranged in the placing cavity (2401) to form a structure capable of elastically stretching along the vertical direction;

two ends of the measuring rod (29) extend out of the bracket body (24).

3. The auxiliary device for measuring a step difference according to claim 2, wherein: the placement cavity (2401) is formed in the bottom surface of the front end part of the bracket body (24) from bottom to top, and the bracket body (24) is not penetrated;

a through hole (2402) is formed in the top wall of the placing cavity (2401);

the middle part of the measuring rod (29) is provided with an annular bulge (2901);

the upper end part of the measuring rod (29) is sleeved with a measuring spring (28), and two ends of the measuring spring (28) respectively prop against the annular bulge (2901) and the top wall of the placing cavity (2401).

4. The auxiliary device for measuring a step as claimed in claim 1, wherein: the locking mechanism is elastically connected with the upper end and the lower end of the measuring rod (29);

after the measuring rod (29) measures, under the action of the elastic tension force of the locking mechanism, the elastic tension force in the horizontal direction is applied, so that the measuring rod (29) cannot move up and down.

5. The assist device for measuring a step as set forth in claim 4, wherein: the locking mechanism comprises a contact block (26) and two locking blocks (25);

the rear end parts of the two locking blocks (25) are respectively contacted with the upper surface and the lower surface of the bracket body (24), and the front end parts of the two locking blocks are fixedly connected to the contact blocks (26) through connecting screws;

the rear end parts of the two locking blocks (25) are separated by corresponding waist-shaped holes (2501); the upper end and the lower end of the measuring rod (29) extend out from the corresponding waist-shaped hole (2501);

the contact block (26) is positioned at the front end of the bracket body (24) and has a distance between the contact block and the bracket body, and a compression spring (27) is arranged between the contact block and the bracket body;

the compression spring (27) applies elastic force to the contact block (26), and the contact block (26) applies elastic tension to the measuring rod (29) through the two locking blocks (25) to prevent the measuring rod (29) from moving in the up-down direction.

6. The auxiliary device for measuring a step as claimed in claim 1, wherein: the device also comprises an extension mechanism, wherein the extension mechanism is arranged at the rear end of the bracket body (24), and the extension mechanism sends the whole auxiliary device into the step difference measuring position of the measured piece (21).

7. The assist device for measuring a step as set forth in claim 6, wherein: the extension mechanism comprises a hinge seat (30) and a two-stage telescopic rod (31);

the hinge seat (30) is U-shaped, is forked on two sides of the rear end of the bracket body (24) and is hinged through a beam pin (32);

the two-stage telescopic rod (31) is connected to the hinge seat (30).

8. The auxiliary device for measuring a step as claimed in claim 1, wherein: the measured piece (21) is arc-shaped in the measuring position, and other parts are arranged at the inner side of the measuring position;

the bottom plate (22) is arc-shaped, and the bottom surface of the bottom plate is matched with the measured piece (21);

when the auxiliary device for measuring the step difference is used for measuring, the inner end of the auxiliary device is abutted against other parts on the inner side of the measuring place.

Images