A hatch door hinge moment measuring device

Abstract

The utility model relates to an aeronautical aerodynamics test measuring equipment field, and a kind of hatch hinge moment measuring device, including hatch, hinge moment balance, cabin, hatch front connecting rod and hatch rear connecting rod;Hinge moment balance adopts middle fixed, two sides double series symmetrical integral structure, including fixed connection end, combination element, balance element transition section, normal force element and model connecting end;Fixed connection end is fixedly connected in cabin, and hatch is fixedly connected with balance through hatch front connecting rod and hatch rear connecting rod, i.e. The utility model discloses a kind of hatch hinge moment measuring device, overcome the problem of inaccurate measurement data of traditional hinge moment balance, realize the high precision measurement of hatch hinge moment of aircraft model in wind tunnel test.

Description

Technical Field

[0001] This invention belongs to the field of aerospace aerodynamic testing and measurement equipment, and particularly relates to a door hinge torque measuring device. Background Technology

[0002] With the increasing independent innovation of aircraft in my country, more and more aircraft are emerging, placing higher demands on the precision, accuracy, and refinement of wind tunnel force measurement tests, especially on the quality of hinge moment test data. The balance is crucial for the success of hinge moment tests, playing a decisive role in the testing capability and force measurement accuracy of control surface hinge moments.

[0003] In the force measurement test of the hinge torque of a certain aircraft model's hatch, due to the thin and narrow hatch, the load on the balance was extremely mismatched, resulting in a small normal force output signal and low resolution. At the same time, the connection and assembly stress also reduced the accuracy of the balance measurement. When conducting wind tunnel tests, the traditional plate hinge torque balance was used to measure the hinge torque of the hatch. Not only was the balance, as a supporting component of the hatch, too rigid, but the hatch also deformed significantly under aerodynamic loads. This resulted in serious model distortion and severely affected the data quality. Summary of the Invention

[0004] The purpose of this invention is to address the problems encountered in the force measurement test of the door hinge torque of a certain aircraft model, overcome the shortcomings of the traditional plate hinge torque balance in measurement accuracy, and propose a door hinge torque measuring device to achieve high-precision measurement of the door hinge torque of the aircraft model in wind tunnel tests.

[0005] The technical solution provided in this application is as follows:

[0006] A hatch hinge torque measuring device includes a hatch, a hinge torque balance, an engine room, an engine room floor cover, a fairing, a front hatch link, a middle hatch link, and a rear hatch link. The hinge torque balance includes a fixed connection end, with a combined element, a balance element transition section, a normal force element, and a model connection end connected sequentially to both ends of the fixed connection end. The fixed connection end is fixedly connected to the engine room. A front hatch link and a rear hatch link are connected to the front and rear of the hatch, respectively, and the other ends of the front and rear hatch links are fixedly connected to the model connection end. The engine room 3 has an engine room floor cover, which is fixedly connected to it with screws. The hatch has a first rectangular groove and a third rectangular groove that are not interconnected. The first rectangular groove and the third rectangular groove are respectively transitionally fitted with the rectangular protrusion connection ends of one end of the front hatch link and the rear hatch link.

[0007] The hatch is also connected to a hatch central link. The hatch has a second rectangular groove. One end of the hatch central link is connected to the second rectangular groove, and the other end of the hatch central link is suspended above the hinge torque balance with a minimum distance of about 1 mm. When measuring the hinge torque on the 0° hatch, there is no second rectangular groove on the hatch and the hatch central link is not connected.

[0008] A circular flexible hinge is provided on the side of the model connection end near the normal force element. The minimum distance from the screw holes at both ends of the balance fixing connection end to the combined element is ≥10mm.

[0009] There is a gap between the transition section of the balance element and the model connection end and the cabin.

[0010] The combined element includes multiple measuring beams connected between the fixed connection end and the transition section of the balance element. The measuring beams are rectangular beams with parallel upper and lower surfaces and two parallel sides. The upper and lower surfaces of the rectangular beams are parallel to the surface of the cabin section directly opposite them. Strain gauges are attached to the upper and lower surfaces of each rectangular beam.

[0011] The measuring beams are set up with eight beams, and each end of the fixed connection end is connected to four beams; the two outer measuring beams have the same height and width, and the two inner measuring beams have the same height and width; the height of the outer measuring beams is less than the height of the inner measuring beams, but the widths are equal.

[0012] The normal force element includes an "I"-shaped measuring beam and a support beam. Both the "I"-shaped measuring beam and the support beam are connected between the transition section of the balance element and the hatch connection end. The support beam is symmetrically arranged on both sides of the middle "I"-shaped measuring beam. The support beam is a cuboid structure composed of multiple spring plates arranged in parallel intervals. The arrangement direction of the multiple spring plates in each support beam is parallel to the thickness direction of the "I"-shaped measuring beam. The thickness direction of the "I"-shaped measuring beam is perpendicular to the surface of the cabin it faces. The width of the two ends of the "I"-shaped measuring beam is greater than the width of the middle structure. Strain gauges are attached to the upper and lower surfaces of both ends of the "I"-shaped measuring beam (241).

[0013] Preferably, there is an arc-shaped flexible hinge one on the outer side of the transition section near the balance element connected to the normal force element support beam; and an arc-shaped flexible hinge two on the outer side of the model connection end connected to the normal force element support beam.

[0014] The side of the measuring beam is rounded with the end face of the cabin connection end and the transition section of the balance element; the arrangement direction of the "I"-shaped measuring beam and the support beam is the width direction of the "I"-shaped measuring beam and the support beam, and the two sides of the "I"-shaped measuring beam in the width direction are rounded with the end face of the cabin connection end and the transition section of the balance element.

[0015] In summary, this application includes at least the following beneficial technical effects:

[0016] 1) The hinge torque balance of the present invention adopts a central fixed and double-connected symmetrical integral structure on both sides, which shortens the distance from the balance design center to the hatch pivot, reduces the additional torque, and enables the balance to achieve better load matching.

[0017] 2) The hinge torque balance element of the present invention is designed on both sides of the fixed connection end, and the two cantilever ends of the balance are connected to the measuring hatch, which increases the connection support stiffness of the measured hatch; and the balance element is a cantilever beam relative to the fixed end, so when the hatch is deformed under load, the effect on the balance element is very small, which improves the measurement accuracy of the balance.

[0018] 3) The hinge torque balance of the present invention is equipped with a separate normal force element for measuring small-range normal forces. Under the action of axial force, hinge torque and rolling torque, the measuring beam hardly deforms. The normal force component has strong anti-interference ability, which improves the measurement accuracy of small normal forces.

[0019] 4) Applying flexible hinges to the design of the hinge torque balance of this invention not only reduces the influence of interference stresses such as screw preload and door deformation under load on the hinge torque balance signal output; but also significantly reduces the interference of axial force, hinge torque and rolling torque on the measurement of small normal force, thereby improving the accuracy of balance measurement.

[0020] 5) The hinge torque balance of the present invention is a combined bridge method, in which each group of measuring elements is composed of a separate measuring bridge. The signal output of the normal force, axial force, hinge torque and rolling torque sensed by the door is composed of different combinations of the signal output of each measuring bridge. This method increases the sensitivity of each element of the balance and improves the accuracy of the balance measurement.

[0021] 6) This invention provides a practical and feasible low-speed wind tunnel test solution for measuring hatch hinge torque. The invention features a robust overall structure and a symmetrical layout of the balance components, ensuring the relative position of the hatch and nacelle under load. This results in highly accurate and reliable experimental data. Changing the hatch angle does not require replacing the hinge torque balance, significantly reducing testing costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the hatch structure described in this invention;

[0024] Figure 3 This is a schematic diagram of the front connecting rod structure of the angled hatch described in this invention;

[0025] Figure 4This is a schematic diagram of the connecting rod structure in the angled hatch of the present invention;

[0026] Figure 5 This is a schematic diagram of the rear linkage structure of the angled hatch described in this invention;

[0027] Figure 6 This is a front view of the hinge torque balance described in this invention;

[0028] Figure 7 for Figure 6 AA section view;

[0029] Figure 8 for Figure 6 Enlarged view of point D;

[0030] Figure 9 for Figure 7 BB section view;

[0031] Figure 10 for Figure 7 CC section view.

[0032] Reference numerals: 1. Hatch door; 2. Hinge torque balance; 3. Cabin; 4. Cabin bottom cover; 5. Radiator; 6. Front linkage of hatch door; 7. Middle linkage of hatch door; 8. Rear linkage of hatch door. 11-First rectangular slot on hatch door 1; 12-Second rectangular slot on hatch door 1; 13-Third rectangular slot on hatch door 1. 31-Circular hole for wiring. 21-Fixed connection end; 22-Combined element; 23-Transition section of balance element; 24-Normal force element; 25-Model connection end. 211-Screw hole; 221-Inner measuring beam; 222-Outer measuring beam; 231-Circular hole for wiring; 232-Circular arc-shaped flexible hinge one; 241-“I”-shaped measuring beam; 242-Support beam; 251-Straight round flexible hinge; 252-Circular arc-shaped flexible hinge two. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments disclosed in the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] This application discloses a hatch hinge torque measuring device, such as... Figure 1 As shown, it includes hatch 1, hinge torque balance 2, engine room 3, engine room bottom cover 4, fairing 5, hatch front linkage 6, hatch middle linkage 7, and hatch rear linkage 8, etc.

[0035] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the hatch 1 has a first rectangular groove 11, a second rectangular groove 12, and a third rectangular groove 13 that are not connected from front to back. These grooves are fixed to the rectangular protrusions of the front connecting rod 6, the middle connecting rod 7, and the rear connecting rod 8 of the hatch, respectively, by screws. The first rectangular groove 11 and the third rectangular groove 13 are transitionally fitted with the rectangular protrusions of the front connecting rod 6 and the rear connecting rod 8 of the hatch to prevent the thin-walled hatch 1 from deforming due to over-constraint, thereby affecting the accuracy of the hatch hinge torque measurement. To simulate the real shape of the aircraft model hatch, the other end of the middle connecting rod 7 of the hatch is suspended above the hinge torque balance 2, with a minimum distance of about 1 mm. The other ends of the front connecting rod 6 and the rear connecting rod 8 of the hatch are fixedly connected to the hinge torque balance 2. The hinge torque balance 2 is fixed to the cabin 3 by screws and pins.

[0036] In order to facilitate the installation and removal of the hinge torque balance 2 and meet the requirements of small-angle door installation, a bottom cover 4 is provided on the engine room 3 and fixed to it with screws. A wiring hole 31 for the hinge torque balance 2 is provided on the lower rear side of the engine room 3.

[0037] By replacing the front door link 6, middle door link 7, and rear door link 8 between the hatch 1 and the hinge torque balance 2, different angles are created between the hatch 1 and the cabin 3.

[0038] like Figure 6 and Figure 7 As shown, the hinge torque balance 2 adopts a centrally fixed, double-tandem symmetrical integral structure, including a fixed connection end 21, a combined element 22, a balance element transition section 23, a normal force element 24, and a model connection end 25. Specifically, the two hatch connection ends 25, the two normal force elements 24, the two balance element transition sections 23, and the two combined elements 22 are symmetrically arranged on both sides of the fixed connection end 21, which is fixedly connected to the engine room 3 in the middle. The combined element 22 is connected in series with the normal force element 24 through the balance element transition section 23 and is symmetrically positioned between the fixed connection end 21 and the model connection end 25.

[0039] like Figure 1 and Figure 6 As shown, the structure of the hinged torque balance 2 shortens the distance from the balance design center to the hatch pivot, reducing the additional torque and enabling the balance to achieve better load matching. Simultaneously, the thin-walled hatch 1 is fixedly connected to the two model connection ends 25 of the balance via the other ends of the hatch front connecting rod 6 and the hatch rear connecting rod 8, meaning the two cantilever ends of the balance connect to the measuring hatch, increasing the connection support stiffness of the measured hatch 1. Furthermore, the balance elements are designed on both sides of the fixed connection end. Since the balance elements are cantilever beams relative to the fixed end, the impact of hatch deformation under load on the balance elements is minimal, improving the measurement accuracy of the balance.

[0040] The bottom surfaces of the symmetrical balance element transition section 23 and the hatch connection end 25 are non-contact surfaces, meaning there is a gap between the bottom surfaces of the balance element transition section 23 and the hatch connection end 25 and the cabin 3. This ensures that the force and torque borne by the hatch during the test are transmitted to the cabin through the balance element. A straight circular flexible hinge 251 is provided on the side of the model connection end 25 near the normal force element 24. The straight circular flexible hinge (251) consists of two semi-cylindrical slots that are symmetrically distributed on the upper and lower surfaces of the model connection end (25). The two semi-cylindrical slots are along the direction perpendicular to the normal force element (24). This flexible hinge has no mechanical gaps and has elastic restoring force, which can significantly reduce the influence of screw preload and interference stress such as deformation of the model cabin 3 under load on the signal output of the hinge torque balance 2.

[0041] The minimum distance from the screw holes 211 at both ends of the fixed connection end 21 to the combined element 22 is ≥10mm, so as to reduce the impact of screw preload on the balance element.

[0042] like Figure 6 — Figure 10 As shown, the balance elements of the hinge torque balance 2 include a combined element 22 and a normal force element 24. The hinge torque balance is equipped with a separate normal force element, which effectively solves the problems of small normal force on the hatch and extreme mismatch of load on the balance.

[0043] The combined element 22 consists of symmetrically arranged measuring beams, which are divided into several rectangular beams (preferably four, based on the structural characteristics and load of the balance) with similar heights and widths. Each rectangular beam has a parallel upper and lower surface, as well as two parallel side surfaces. The upper and lower surfaces of the rectangular beams are parallel to the three side walls of the cabin directly opposite them. The two outer measuring beams 222 have the same height and width, while the two inner measuring beams 221 have the same height and width. The outer measuring beams 222 are shorter than the inner measuring beams 221, but their widths are equal.

[0044] The transition section 23 of the balance element has a circular hole 231 for the wiring of the hinge torque balance 2.

[0045] During the wind tunnel test, the aerodynamic load acting on the hatch 1 causes corresponding deformation of the combined element 22 of the hinge moment balance 2 through the model connection ends 25 at both ends of the balance. Strain gauges are attached to the upper and lower surfaces of the four-column rectangular beam to form a Wheatstone bridge. After different combinations of these four voltage increment signals, and after computer processing, the axial force component, hinge moment component, and rolling moment component of the aerodynamic load acting on the hatch 1 are accurately measured. The hinge moment is measured by the torsional deformation of the column beam, while the rolling moment and axial force are measured by the bending deformation of the column beam.

[0046] Compared to traditional plate balances, plate balances based on column beams are much less sensitive to connection conditions, have higher measurement accuracy, and are more suitable for wind tunnel force measurement tests. Preferably, the four pairs of symmetrically arranged measuring beams have rounded corners at all four front and rear ends. That is, the two sides of each measuring beam are rounded with rounded corners between them and the end faces of the fixed connection end 21 and the transition section 23 of the balance element, in order to reduce stress concentration of the measuring beams under the aerodynamic forces of the hatch.

[0047] The normal force element 24 includes an "I"-shaped measuring beam 241 and a support beam 242. Both the "I"-shaped measuring beam 241 and the support beam 242 are connected between the balance element transition section 23 and the model connection end 25. The support beam 242 is symmetrically arranged on both sides of the middle "I"-shaped measuring beam 241. The support beam 242 is a cuboid structure formed by multiple spring plates arranged in parallel intervals (preferably 5 spring plates according to the structural characteristics of the balance and the load size). The arrangement direction of the multiple spring plates in each support beam 242 is parallel to the thickness direction of the "I"-shaped measuring beam (241). The thickness direction of the "I"-shaped measuring beam (241) is perpendicular to the surface of the cabin (3) it faces. The width of the two ends of the "I"-shaped measuring beam is greater than the width of the middle structure. According to the principle of deformation coordination, most of the normal force load is borne by the "I"-shaped measuring beam 241.

[0048] Preferably, an arc-shaped flexible hinge 232 is provided on the outer side of the transition section 23 near the balance element connected to the support beam 242; and an arc-shaped flexible hinge 252 is provided on the outer side of the model connection end 25 near the support beam 242. The arc-shaped flexible hinge 232 includes a first cylindrical groove and a first rectangular groove formed on the surface of the transition section 23 of the balance element. The first rectangular groove is located between two adjacent support beams 242 and its width is equal to the distance between the two support beams 242. The length of the first rectangular groove along the length direction of the support beam 242 is greater than twice the thickness of the support beam 242. The first cylindrical groove is located at one end of the first rectangular groove. The arc-shaped flexible hinge 252 includes a second cylindrical groove and a second rectangular groove formed on the surface of the model connection end 25. The second rectangular groove is located between two adjacent support beams 242 and its width is equal to the distance between the two support beams 242. The length of the second rectangular groove along the length direction of the support beam 242 is greater than twice the thickness of the support beam 242. The second cylindrical groove is located at one end of the first rectangular groove. This flexible hinge features high sensitivity, good mechanical force decomposition, and minimal interference with the balance. When the hinge moment balance 2 is subjected to aerodynamic loads, the support beam 242, with its stiffness significantly greater than that of the "I"-shaped measuring beam 241 in the directions of axial force, hinge moment, and rolling moment, bears most of the load. Meanwhile, the "I"-shaped measuring beam 241 hardly deforms, thus greatly reducing the interference of axial force, hinge moment, and rolling moment on the measurement of normal force.

[0049] During the wind tunnel test, the aerodynamic load acting on the hatch 1 causes corresponding deformation of the normal force element 24 of the hinge moment balance 2 through the model connection ends 25 at both ends of the balance. Strain gauges are attached to the upper and lower surfaces of both ends of the "I"-shaped measuring beam (241) to form a Wheatstone bridge. After superimposing the voltage increment signals on the symmetrical measuring beam 241, the signals are processed by a computer to achieve accurate measurement of the normal force component acting on the hatch 1. The normal force is measured by the bending deformation of the measuring beam 241.

[0050] Preferably, the four corners of the front and rear of the symmetrically arranged "I"-shaped measuring beam 241 and support beam 242 are rounded to reduce stress concentration in the beams.

[0051] The normal force element 24 adopts a symmetrical structural design, which reduces the difficulty of machining and also reduces the interference of axial force, hinge torque and rolling torque on the normal force component, thereby improving the measurement accuracy of the normal force.

[0052] A rectifier plate 5 is designed at each end of the fixed connection end 21. The other end of the rectifier plate 5 extends to the hatch connection end 25, so that the strain gauge is covered by the rectifier plate 5, so that the strain gauge is not exposed to the airflow, preventing damage to the balance components due to excessive test wind speed or large temperature drift during the test, and preventing it from colliding with the hatch connection end 25. The rectifier plate 5 is fixedly connected to the fixed connection end 21 of the hinge torque balance 2 by screws.

[0053] During wind tunnel testing, the angle of hatch 1 can be changed by altering the angle blocks of each link of hatch 1, eliminating the need to replace the hinge torque balance and greatly saving testing costs.

[0054] Since the cabin 3 connects to two doors 1, the above embodiment describes the structure of a door hinge torque measuring device between a door 1 and the cabin 3. During wind tunnel testing, the hinge torque measuring device on the other side of the cabin adopts a similar structure to that on this side; when measuring the hinge torque on the 0° door, the 0° door's shape is about 1mm smaller around the perimeter than the non-0° door's shape, and there is no second rectangular groove 12 in the middle, to avoid the 0° door colliding with the cabin and causing the hinge torque balance to fail.

[0055] This invention provides a practical and feasible low-speed wind tunnel test solution for measuring hatch hinge torque. The invention features a robust overall structure and a symmetrical layout of the balance components, ensuring the relative position of the hatch and nacelle under load. This results in highly accurate and reliable experimental data. Changing the hatch angle does not require replacing the hinge torque balance, significantly reducing testing costs.

[0056] The contents not described in detail in this application specification are common knowledge to those skilled in the art.

[0057] The present application has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present application. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and implementation methods of the present application without departing from the spirit and scope of the present application, and all such modifications and improvements fall within the scope of the present application. The scope of protection of the present application is determined by the appended claims.

Claims

1. A hatch hinge torque measuring device, characterized in that: Includes the hatch (1), hinge torque balance (2), engine room (3), front hatch link (6) and rear hatch link (8); The hinge torque balance (2) includes a fixed connection end (21), and both ends of the fixed connection end (21) are connected in sequence to a combination element (22), a balance element transition section (23), a normal force element (24) and a model connection end (25); The fixed connection end (21) is fixedly connected to the cabin (3). The cabin door (1) is connected to the front cabin door link (6) and the rear cabin door link (8). The other ends of the front cabin door link (6) and the rear cabin door link (8) are respectively fixedly connected to a model connection end (25). Multiple strain gauges are attached to the combined element (22) and the normal force element (24).

2. The hatch hinge torque measuring device according to claim 1, characterized in that: The hatch (1) is provided with a first rectangular groove (11) and a third rectangular groove (13) that are not connected. The front connecting rod (6) and the rear connecting rod (8) of the hatch are provided with a rectangular protrusion connecting end at one end connected to the hatch (1). The first rectangular groove (11) and the third rectangular groove (13) are respectively transitionally fitted with the rectangular protrusion connecting ends of the front connecting rod (6) and the rear connecting rod (8).

3. The hatch hinge torque measuring device according to claim 2, characterized in that: The hatch (1) is also connected to a hatch middle link (7). The hatch (1) is provided with a second rectangular groove (12). One end of the hatch middle link (7) is connected to the second rectangular groove (12), and the other end of the hatch middle link (7) is suspended above the hinge torque balance (2) with a minimum spacing of 1mm. When measuring the hinge torque on the 0° hatch, there is no second rectangular groove (12) on the hatch (1) and it is not connected to the connecting rod (7) in the hatch.

4. The hatch hinge torque measuring device according to claim 1, characterized in that: The engine room (3) is connected to the engine room bottom cover (4) by screws, and the engine room (3) has a wiring hole (31) for the hinge torque balance (2) on the rear side of the engine room (3).

5. The hatch hinge torque measuring device according to claim 1, characterized in that: The transition section (23) of the balance element and the model connection end (25) are both separated from the cabin (3); a straight circular flexible hinge (251) is provided on the side of the model connection end (25) near the normal force element (24). The straight circular flexible hinge (251) is composed of two semi-cylindrical grooves that are symmetrically distributed on the upper and lower surfaces of the model connection end (25). The two semi-cylindrical grooves are along the direction perpendicular to the normal force element (24); the minimum distance from the screw holes (211) at both ends of the balance fixed connection end (21) to the combined element (22) is ≥10mm.

6. The hatch hinge torque measuring device according to claim 1, characterized in that: The combined element (22) includes multiple measuring beams connected between the fixed connection end (21) and the balance element transition section (23). The measuring beams are rectangular beams with parallel upper and lower surfaces and two parallel sides. The upper and lower surfaces of the rectangular beams are parallel to the surface of the side wall of the cabin (3) opposite to them. Strain gauges are attached to the upper and lower surfaces of each rectangular beam. The transition section (23) of the balance element has a circular hole (231) for the wiring of the hinge torque balance (2).

7. The hatch hinge torque measuring device according to claim 6, characterized in that: Eight measuring beams are provided, and each end of the fixed connection end (21) is connected to four measuring beams; the four measuring beams are arranged in sequence, the two outer measuring beams are called outer measuring beams (222), and the two inner measuring beams are called inner measuring beams (221); the two outer measuring beams (222) have the same height and width, and the two inner measuring beams (221) have the same height and width; the height of the outer measuring beams (222) is less than the height of the inner measuring beams (221), and the width of the outer measuring beams (222) is equal to that of the inner measuring beams (221).

8. The hatch hinge torque measuring device according to claim 6, characterized in that: The normal force element (24) includes an "I"-shaped measuring beam (241) and a support beam (242). The "I"-shaped measuring beam (241) and the support beam (242) are connected between the balance element transition section (23) and the model connection end (25). The support beam (242) is symmetrically arranged on both sides of the middle "I"-shaped measuring beam (241). The support beam (242) is a cuboid structure formed by multiple spring plates arranged in parallel intervals. The arrangement direction of the multiple spring plates in each support beam (242) is parallel to the thickness direction of the "I"-shaped measuring beam (241). The thickness direction of the "I"-shaped measuring beam (241) is perpendicular to the surface of the cabin (3) directly opposite it. The width of the two ends of the "I"-shaped measuring beam is greater than the width of the middle structure. Strain gauges are attached to the surfaces of the two ends of the "I"-shaped measuring beam facing the support beam (242). An arc-shaped flexible hinge (232) is provided at the end of the balance element transition section (23) connected to the support beam (242). The arc-shaped flexible hinge (232) includes a first cylindrical groove and a first rectangular groove on the surface of the balance element transition section (23). The first rectangular groove is located between two adjacent support beams (242) and its width is equal to the distance between the two support beams (242). The length of the first rectangular groove along the length direction of the support beam (242) is greater than that of the support beam (242). The first cylindrical groove is provided at one end of the first rectangular groove, which is twice the thickness of the support beam (242). A second arc-shaped flexible hinge (252) is provided at the end of the model connection end (25) connected to the support beam (242). The second arc-shaped flexible hinge (252) includes a second cylindrical groove and a second rectangular groove provided on the surface of the model connection end (25). The second rectangular groove is located between two adjacent support beams (242) and its width is equal to the distance between the two support beams (242). The length of the second rectangular groove along the length direction of the support beam (242) is greater than twice the thickness of the support beam (242). The second cylindrical groove is provided at one end of the first rectangular groove.

9. A hatch hinge torque measuring device according to claim 6, characterized in that: The side of the measuring beam is rounded with a chamfer between the fixed connection end (21) and the end face of the transition section (23) of the balance element; The arrangement direction of the "I"-shaped measuring beam and the support beam is the width direction of the "I"-shaped measuring beam and the support beam. The two sides of the "I"-shaped measuring beam in the width direction are rounded with the end face of the fixed connection end (21) and the transition section (23) of the balance element.

10. The hatch hinge torque measuring device according to claim 1, characterized in that: The fixed connection end (21) is equipped with a rectifier (5) on the side closer to the cabin (3) and the side farther away from the cabin (3) at both ends, and the other end of the rectifier (5) extends to the model connection end (25).

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