CN217083565U

CN217083565U - A auxiliary fixtures for measuring undercarriage shock strut mirror surface length

Info

Publication number: CN217083565U
Application number: CN202220702064.6U
Authority: CN
Inventors: 张伟光; 吕善宝; 李保江
Original assignee: Shandong Taikoo Aircraft Engineering Co Ltd
Current assignee: Shandong Taikoo Aircraft Engineering Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-29
Anticipated expiration: 2032-03-29

Abstract

The utility model provides an auxiliary fixtures for measuring undercarriage shock strut mirror surface length, the position of II directional dipperstick of location pointer is main undercarriage shock strut mirror surface lower extreme position promptly, loosen locking device II and can make II vertical slip of reference column along guide pin bushing, be convenient for adjust vertical direction position, telescopic link II slides simultaneously in telescopic link I this moment, match longitudinal position and adjust, until with location pointer I longitudinal position adjust to with main undercarriage shock strut mirror surface up end looks parallel and level, through the scale interval of reading I directional dipperstick of location pointer, can obtain the length value between location pointer I and the location pointer II, this length value is the length of main undercarriage shock strut mirror surface promptly, improve the efficiency and the precision of aircraft work of weighing.

Description

A auxiliary fixtures for measuring undercarriage shock strut mirror surface length

Technical Field

The utility model relates to an aircraft maintenance tool field, concretely relates to auxiliary fixtures for measuring undercarriage shock strut mirror surface length.

Background

When the boeing-series aircraft is weighed, the mirror surface length of a shock absorption strut of a main landing gear needs to be measured so as to determine the moment arm of the main landing gear, and the calculation formula of the moment arm is as follows: main landing gear moment arm =706.17+0.1034 by DIM "a" (this is the 737NG aircraft calculation formula other model aircraft constants will vary), where DIM "a" is the main landing gear shock strut mirror length. The accuracy of the main landing gear shock strut mirror length measurement will affect the accuracy of the weighing results and will affect the determination of the aircraft center of gravity position. In the actual aircraft weighing process, the following problems exist: firstly, the main landing gear shock strut mirror surface is scratched in the measuring process; secondly, the measured data is inaccurate due to the lack of special measuring tools when the length of the mirror surface is measured; third, the requirement of aircraft weighing according to the WBM manual is typically done twice (except for customer-specific requirements), because of the lack of dedicated measurement tools and the fact that the mirror length is a dynamic value as a function of position, there may be a deviation of the angle of two readings when the measurement data is read, further affecting the accuracy of the two sets of measurement data. The above problems not only affect the accuracy of weighing data, but also affect the overall working efficiency of the company due to the increase of the weighing times.

Disclosure of Invention

In order to overcome the defects of the technology, the invention provides the auxiliary tool for measuring the mirror surface length of the landing gear shock absorption support, which is convenient to use and improves the working efficiency and precision of airplane weighing.

The technical scheme adopted by the invention for overcoming the technical problems is as follows:

an auxiliary tool for measuring the mirror surface length of a shock strut of an undercarriage comprises:

the side end of the support is provided with a guide sleeve I along the horizontal direction, and the lower end of the support is provided with a positioning column II along the vertical direction;

the positioning column I is installed in the guide sleeve I in a sliding mode in the horizontal direction, the locking device I locks and fixes the positioning column I relative to the guide sleeve I, and the head end of the positioning column I is connected with the upper end of the undercarriage damping strut through the connecting device I;

the upper end of the connecting seat II is provided with a guide sleeve II along the vertical direction, the positioning column II is inserted into the guide sleeve II in a sliding mode along the vertical direction, the locking device II locks and fixes the positioning column II relative to the guide sleeve II, the rear end of the connecting seat II is provided with a positioning pointer I along the horizontal direction, the lower end of the connecting seat II is provided with a measuring ruler along the vertical direction, the side end of the connecting seat II is rotatably provided with a positioning column III through a rotating shaft, and the positioning column III is arranged along the horizontal direction;

the positioning column III is horizontally arranged, the positioning column III is inserted into the guide sleeve III in a sliding mode, a telescopic rod I is installed at the lower end of the guide sleeve III along the vertical direction, a telescopic rod II is inserted into the telescopic rod I in a sliding mode, and the positioning column III is locked and fixed relative to the guide sleeve III through a locking device III;

connecting device II installs in the lower extreme of telescopic link II, and connecting device II is connected fixedly with the connecting seat I of the locking bolt subassembly of main undercarriage shock strut mirror surface lower extreme, connecting device II's rear end is provided with location pointer II along the horizontal direction, and the lower terminal surface of location pointer II is parallel and level mutually with the lower terminal surface of main undercarriage shock strut mirror surface.

Furthermore, above-mentioned locking device I includes and sets up guide way I on reference column I along the horizontal direction, be provided with the screw on the guide pin bushing I, during locking screw I fits the screw soon, the head end of locking screw I inserted in guide way I and contacted with the bottom of guide way I.

Furthermore, above-mentioned connecting device I sets up in the screw rod of base outside end including setting up in the base of I head end of reference column and along the horizontal direction, and the screw rod utilizes I locking of nut to fix after passing undercarriage shock strut's the locating hole of upper end, the base contacts with undercarriage shock strut.

Furthermore, the locking device II comprises a guide groove II which is arranged on the positioning column II along the vertical direction, a screw hole is formed in the guide sleeve II, the locking screw II is screwed in the screw hole, and the head end of the locking screw II is inserted into the guide groove II and is contacted with the bottom of the guide groove II.

Furthermore, above-mentioned locking device III includes and sets up the guide way III on reference column III along the horizontal direction, be provided with the screw on the guide pin bushing III, locking screw III fits in the screw soon, and the head end of locking screw III inserts in the guide way III and contacts with the bottom of guide way III.

Furthermore, above-mentioned connecting device II includes along the axial set up in screw, the carousel of disc of II head ends of telescopic link, set up in the through-hole of carousel central point, set up in location pointer II of carousel rear end, set up convex arc wall and linking arm on the carousel, the arc wall is concentric with the through-hole, and during bolt I passed the arc wall and then fitted in the screw of II head ends of telescopic link soon, the head end of linking arm was provided with the square hole, and the square head bolt is arranged in the square hole, and the square head bolt passes and utilizes nut III locking to fix behind the through-hole, and bolt II utilizes nut II locking to fix behind linking arm tail end and the I back of connecting seat.

The invention has the beneficial effects that: the position of II directional dipperstick of location pointer is main undercarriage shock strut mirror surface lower extreme position promptly, loosen locking device II and can make II vertical slides along guide pin bushing of reference column II, be convenient for adjust vertical direction position, telescopic link II slides simultaneously in telescopic link I this moment, match vertical position control, until with location pointer I longitudinal position adjust to with main undercarriage shock strut mirror surface up end looks parallel and level, scale interval through reading I directional dipperstick of location pointer, can obtain the length value between location pointer I and the location pointer II, this length value is the length of main undercarriage shock strut mirror surface promptly, improve the efficiency and the precision of aircraft work of weighing.

Drawings

FIG. 1 is a perspective view of the present invention in a use state;

FIG. 2 is a schematic perspective view of the present invention;

in the drawing, 1, a main landing gear damping strut mirror surface 2, a landing gear damping strut 3, a connecting seat I4, a base 5, a positioning column I6, a guide groove I7, a guide sleeve I8, a locking screw I9, a support 10, a positioning column II 11, a guide groove II 12, a guide sleeve II 13, a set screw II 14, a connecting seat II 15, a positioning column III 16, a guide groove III 17, a guide sleeve III 18, a set screw III 19, a measuring scale 20, a positioning pointer I21, a telescopic rod I22, a telescopic rod II 23, a rotating disc 24, a positioning pointer II 25, a connecting arm 26, a screw 27, a nut I28, a through hole 29, an arc-shaped groove 30, a bolt I31, a square hole 32, a square head bolt III 33, a nut II 34, a bolt II 35 and a rotating shaft are arranged on the main landing gear damping strut mirror surface 2, the guide sleeve II 23, the rotating disc II 25 and the rotating shaft.

Detailed Description

The invention will be further explained with reference to fig. 1 and 2.

An auxiliary tool for measuring the mirror surface length of a shock strut of an undercarriage comprises: the side end of the support 9 is horizontally provided with a guide sleeve I7, and the lower end of the support is vertically provided with a positioning column II 10; the positioning column I5 is installed in the guide sleeve I7 in a sliding mode in the horizontal direction, the locking device I locks and fixes the positioning column I5 relative to the guide sleeve I7, and the head end of the positioning column I5 is connected with the upper end of the undercarriage damping strut 2 through the connecting device I; the upper end of the connecting seat II 14 is provided with a guide sleeve II 12 in the vertical direction, the positioning column II 10 is inserted into the guide sleeve II 12 in the vertical direction in a sliding mode, the locking device II locks and fixes the positioning column II 10 relative to the guide sleeve II 12, the rear end of the connecting seat II 14 is provided with a positioning pointer I20 in the horizontal direction, the lower end of the connecting seat II 14 is provided with a measuring scale 19 in the vertical direction, the side end of the connecting seat II is rotatably provided with a positioning column III 15 through a rotating shaft, and the positioning column III 15 is arranged in the horizontal direction; the positioning column III 15 is inserted into the guide sleeve III 17 in a sliding manner, a telescopic rod I21 is installed at the lower end of the guide sleeve III 17 along the vertical direction, a telescopic rod II 22 is inserted into the telescopic rod I21 in the sliding manner, and the positioning column III 15 is locked and fixed relative to the guide sleeve III 17 by a locking device III; connecting device II installs in the lower extreme of telescopic link II 22, and connecting device II is connected fixedly with main undercarriage shock strut mirror surface 1 lower extreme locking bolt subassembly's connecting seat I3, and connecting device II's rear end is provided with location pointer II 24 along the horizontal direction, and the lower terminal surface of location pointer II 24 is parallel and level mutually with main undercarriage shock strut mirror surface 1's lower terminal surface. When in use, the upper end of the whole auxiliary tool is fixed to the upper end of the undercarriage damping strut 2 through the connecting device I, the positioning column I5 can horizontally slide along the guide sleeve I7 by loosening the locking device I, the positioning column III 15 can horizontally slide along the guide sleeve III 17 by loosening the locking device III, the transverse position is convenient to adjust, the lower end of the whole tool is ensured to be fixed on the connecting seat I3 at the lower end of the main undercarriage damping strut mirror surface 1 through the connecting device II by adjusting the extending length of the telescopic rod II 22 relative to the telescopic rod I21, the position of the positioning pointer II 24 pointing to the measuring scale 19 is the lower end position of the main undercarriage damping strut mirror surface 1, the positioning column II 10 can vertically slide along the guide sleeve II 12 by loosening the locking device II, the vertical position is convenient to adjust, and the telescopic rod II 22 simultaneously slides in the telescopic rod I21, and matching longitudinal position adjustment until the positioning pointer I20 is adjusted to be flush with the upper end face of the main landing gear shock strut mirror face 1 at the longitudinal position, and reading the scale value of the measuring scale 19 pointed by the positioning pointer I20 to obtain the length value between the positioning pointer I20 and the positioning pointer II 24, wherein the length value is the length of the main landing gear shock strut mirror face 1, so that the efficiency and the precision of airplane weighing work are improved.

Locking device I can be following structure, and it includes sets up guide way I6 on reference column I5 along the horizontal direction, is provided with the screw on guide pin bushing I7, and locking screw I8 is screwed in the screw, and the head end of locking screw I8 inserts in guide way I6 and contacts with the bottom of guide way I6. After the locking screw I8 is screwed, the head end of the locking screw I8 is in contact with the guide groove I6, and the locking force is utilized to realize the locking fixation of the guide sleeve I7 and the positioning column I5. After the locking screw I8 is loosened, the positioning column I5 can slide along the guide sleeve I7, and the head end of the locking screw I8 slides in the guide groove I6 to play a role in guiding.

Connecting device I can be following structure, and it sets up in the screw rod 26 of base 4 outside end including setting up in the base 4 of I5 head ends of reference column and along the horizontal direction, and screw rod 26 utilizes I27 locking of nut to fix after passing undercarriage shock strut 2 upper end's locating hole, and base 4 contacts with undercarriage shock strut. Pass behind the locating hole of undercarriage shock strut 2 upper end through screw rod 26 and install fixedly at turnnut I27, simple structure, the installation is dismantled conveniently.

The locking device II can be of a structure comprising a guide groove II 11 arranged on the positioning column II 10 in the vertical direction, a screw hole is formed in the guide sleeve II 12, a locking screw II 13 is screwed in the screw hole, and the head end of the locking screw II 13 is inserted into the guide groove II 11 and is in contact with the bottom of the guide groove II 11. After the locking screw II 13 is screwed, the head end of the locking screw II 13 is contacted with the guide groove II 11, and the locking fixation of the guide sleeve II 11 and the positioning column II 10 is realized by utilizing the locking force. After the locking screw II 13 is loosened, the positioning column II 10 can slide along the guide sleeve II 12, and the head end of the locking screw II 13 slides in the guide groove II 11 to play a role in guiding.

The locking device III can be of a structure comprising a guide groove III 16 arranged on the positioning column III 15 along the horizontal direction, a screw hole is formed in the guide sleeve III 17, a locking screw III 18 is screwed in the screw hole, and the head end of the locking screw III 18 is inserted into the guide groove III 16 and is contacted with the bottom of the guide groove III 16. After the locking screw III 18 is screwed, the head end of the locking screw III 18 is contacted with the guide groove III 16, and the locking fixation of the guide sleeve III 17 and the positioning column III 15 is realized by utilizing the locking force. After the locking screw III 18 is loosened, the positioning column III 15 can slide along the guide sleeve III 17, and the head end of the locking screw III 18 slides in the guide groove III 16 to play a role in guiding.

The connecting device II can be of a structure comprising a screw hole axially formed in the head end of the telescopic rod II 22, a disc-shaped rotary table 23, a through hole 28 formed in the center of the rotary table 23, a positioning pointer II 24 formed in the rear end of the rotary table 23, an arc-shaped groove 29 and a connecting arm 25 formed in the rotary table 23 in a circular arc shape, the arc-shaped groove 29 and the through hole 28 are concentric, a bolt I30 penetrates through the arc-shaped groove 29 and then is screwed into the screw hole in the head end of the telescopic rod II 22, a square hole 31 is formed in the head end of the connecting arm 25, a square-head bolt 32 is located in the square hole 31, the square-head bolt 32 penetrates through the through hole 28 and then is locked and fixed through a nut III 35, and a bolt II 34 penetrates through the tail end of the connecting arm 25 and the connecting seat I3 and then is locked and fixed through a nut II 33. Linking arm 25 passes through II 34 of bolt and nut II 33 and the installation of connecting seat I3 is fixed, and the installation is dismantled conveniently, loosens bolt I30 and III 35 backs of nut, can rotate carousel 23, and bolt I30 slides in arc wall 29, can be convenient for adjust the angle of II 24 of location pointer, makes it rotate to parallel with dipperstick 19 to the reading of being convenient for, it can to adjust back locking bolt I30 and III 35 of nut that target in place.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an auxiliary fixtures for measuring undercarriage shock strut mirror surface length which characterized in that includes:

the side end of the support (9) is provided with a guide sleeve I (7) along the horizontal direction, and the lower end of the support is provided with a positioning column II (10) along the vertical direction;

the positioning column I (5) is installed in the guide sleeve I (7) in a sliding mode in the horizontal direction, the locking device I locks and fixes the positioning column I (5) relative to the guide sleeve I (7), and the head end of the positioning column I (5) is connected with the upper end of the undercarriage damping strut (2) through the connecting device I;

the upper end of the connecting seat II (14) is provided with a guide sleeve II (12) in the vertical direction, the positioning column II (10) is inserted into the guide sleeve II (12) in the vertical direction in a sliding mode, the locking device II locks and fixes the positioning column II (10) relative to the guide sleeve II (12), the rear end of the connecting seat II (14) is provided with a positioning pointer I (20) in the horizontal direction, the lower end of the connecting seat II is provided with a measuring scale (19) in the vertical direction, the side end of the connecting seat II is rotatably provided with a positioning column III (15) through a rotating shaft, and the positioning column III (15) is arranged in the horizontal direction;

the positioning column III (15) is inserted into the guide sleeve III (17) in a sliding manner, a telescopic rod I (21) is installed at the lower end of the guide sleeve III (17) along the vertical direction, a telescopic rod II (22) is inserted into the telescopic rod I (21) in the sliding manner, and the positioning column III (15) is locked and fixed relative to the guide sleeve III (17) by a locking device III;

connecting device II installs in the lower extreme of telescopic link II (22), and connecting device II is connected fixedly with locking bolt assembly's connecting seat I (3) of main undercarriage shock strut mirror surface (1) lower extreme, connecting device II's rear end is provided with location pointer II (24) along the horizontal direction, and the lower terminal surface of location pointer II (24) is parallel and level mutually with the lower terminal surface of main undercarriage shock strut mirror surface (1).

2. The auxiliary tool for measuring the mirror length of the landing gear shock strut according to claim 1, wherein: locking device I includes and sets up guide way I (6) on reference column I (5) along the horizontal direction, be provided with the screw on guide pin bushing I (7), during locking screw I (8) fit the screw soon, the head end of locking screw I (8) inserted in guide way I (6) and contacted with the bottom of guide way I (6).

3. The auxiliary tool for measuring the mirror length of the landing gear shock strut according to claim 1, wherein: connecting device I sets up in screw rod (26) of base (4) outside end including setting up in base (4) of reference column I (5) head end and along the horizontal direction, and screw rod (26) utilize behind the locating hole of undercarriage shock strut (2) upper end nut I (27) locking fixed, base (4) contact with undercarriage shock strut.

4. The auxiliary tool for measuring the mirror length of the landing gear shock strut according to claim 1, wherein: locking device II includes along vertical direction setting in guide way II (11) on reference column II (10), be provided with the screw on guide pin bushing II (12), during locking screw II (13) fit the screw soon, the head end of locking screw II (13) inserted in guide way II (11) and contacted with the bottom of guide way II (11).

5. The auxiliary tool for measuring the mirror length of the landing gear shock strut according to claim 1, wherein: the locking device III comprises a guide groove III (16) arranged on the positioning column III (15) in the horizontal direction, a screw hole is formed in the guide sleeve III (17), a locking screw III (18) is screwed in the screw hole, and the head end of the locking screw III (18) is inserted into the guide groove III (16) and is in contact with the bottom of the guide groove III (16).

6. The auxiliary tool for measuring the mirror length of the landing gear shock strut according to claim 1, wherein: the connecting device II comprises a screw hole arranged at the head end of the telescopic rod II (22) along the axial direction, a disc-shaped rotating disc (23), a through hole (28) arranged at the central part of the rotating disc (23), a positioning pointer II (24) arranged at the rear end of the rotating disc (23), a circular arc-shaped groove (29) arranged on the rotating disc (23) and a connecting arm (25), the arc-shaped groove (29) is concentric with the through hole (28), the bolt I (30) passes through the arc-shaped groove (29) and then is screwed in the screw hole at the head end of the telescopic rod II (22), the head end of the connecting arm (25) is provided with a square hole (31), a square bolt (32) is positioned in the square hole (31), the square-head bolt (32) penetrates through the through hole (28) and then is locked and fixed through the nut III (35), and the bolt II (34) penetrates through the tail end of the connecting arm (25) and the connecting seat I (3) and then is locked and fixed through the nut II (33).