Brake command sensor

Abstract

The invention provides a brake instruction sensor, and relates to the technical field of aircraft brake design. The sensor comprises a cover body, a connecting sleeve, a fisheye joint, a sliding sleeve, a shell, a reset spring, a core body assembly and a rear end cover assembly; the fisheye joint is connected with the brake assembly; the connecting sleeve is connected to the side, away from the fisheye connector, of the cover body. One end of the sliding sleeve is connected to the periphery of the connecting sleeve; a first electromagnetic induction assembly is arranged in the sliding sleeve; one end of the shell sleeves the periphery of the other end of the sliding sleeve; the reset spring sleeves the periphery of the sliding sleeve, and two ends of the reset spring are respectively contacted with the cover body and the third open end; the core body assembly comprises a core body, the core body is of a hollow structure, and a second electromagnetic induction assembly is arranged on the inner wall of the core body; the first electromagnetic induction assembly is sleeved in the core body; when the first electromagnetic induction assembly moves in the axial direction of the sliding sleeve, the first electromagnetic induction assembly and the second electromagnetic induction assembly generate electromagnetic induction so as to generate a braking instruction. And the rear end cover assembly is connected with the shell.

Description

Technical Field

[0001] The present disclosure relates to the technical field of aircraft brake systems, and in particular to a brake command sensor. Background Art

[0002] With the development of science and technology, more and more people choose to travel by plane, and flight safety has also attracted more attention. The wheel brake system of an aircraft is the main braking method when the aircraft lands, and it plays an indispensable role in the take-off and landing process of the aircraft. The brake command sensor is a component that transmits the pilot's pedal command to the brake control system through an electrical signal equivalent to the pedal depression stroke. However, existing brake command sensors usually adopt a single-channel design and have low reliability.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The present disclosure provides a brake command sensor, which can improve structural reliability.

[0005] According to one aspect of the present disclosure, a brake command sensor is provided, comprising:

[0006] A front end cover assembly, comprising a front end cover and a fisheye joint connected to the front end cover, wherein the fisheye joint is connected to the brake assembly; the front end cover comprises a cover body and a connecting sleeve connected to a side of the cover body away from the fisheye joint;

[0007] The sliding sleeve comprises a first open end and a second open end; the first open end is connected to the outer periphery of the connecting sleeve; the second open end is located at a side of the first open end away from the fisheye joint; a plurality of first electromagnetic induction components are arranged in the sliding sleeve;

[0008] The housing comprises a third open end and a fourth open end which are connected to each other, wherein the third open end is sleeved on the outer periphery of the second open end; and the fourth open end is located on a side of the third open end away from the first open end;

[0009] A return spring is sleeved on the outer circumference of the sliding sleeve, and two ends of the return spring are in contact with the cover body and the third open end respectively; compressing or releasing the return spring can make the first electromagnetic induction component in the sliding sleeve move along the axial direction of the sliding sleeve;

[0010] A core assembly, at least part of which is sleeved in the second open end, and the rest of which is sleeved in the shell; the core assembly includes a plurality of cores, the cores are hollow tubular structures, and the inner wall of the cores is provided with a second electromagnetic induction assembly; different first electromagnetic induction assemblies are sleeved in different cores in a one-to-one correspondence; when the first electromagnetic induction assembly moves along the axial direction of the sliding sleeve, the first electromagnetic induction assembly and the corresponding second electromagnetic induction assembly generate electromagnetic induction, and the displacement can be converted into an electrical signal to generate a brake command;

[0011] A rear end cover assembly is connected to the fourth open end.

[0012] In an exemplary embodiment of the present disclosure, the outer circumferential surface of the connecting sleeve is provided with an external thread, the inner circumferential surface of the first open end is provided with an internal thread, and the connecting sleeve and the sliding sleeve are connected through the external thread and the internal thread;

[0013] The connecting sleeve is provided with a first threaded hole, which penetrates the side wall of the connecting sleeve along a direction perpendicular to the axial direction of the connecting sleeve; the first open end is provided with a second threaded hole, which penetrates the side wall of the first open end along a direction perpendicular to the axial direction of the sliding sleeve; the aperture of the second threaded hole is equal to the aperture of the first threaded hole;

[0014] The brake command sensor further includes a set screw, which passes through the second threaded hole and the first threaded hole in sequence and is threadedly connected to the second threaded hole and the first threaded hole.

[0015] In an exemplary embodiment of the present disclosure, a connection hole is provided on the cover; and the brake command sensor further includes:

[0016] A push rod, one end of which is connected to the cover body through the connecting hole, and the other end of which extends to the side of the cover body away from the connecting sleeve; the push rod has a blind hole, which is recessed inward from the end of the push rod away from the connecting sleeve; a first pin hole and a second pin hole which are arranged opposite to each other and have the same aperture are provided on the side wall of the blind hole;

[0017] An idle travel spring is arranged in the blind hole;

[0018] The fisheye joint comprises a front connecting portion and a piston rod connected to each other, the piston rod penetrates into the blind hole and contacts the idle travel spring, and the front connecting portion is connected to the brake assembly; a waist-shaped hole is provided on the piston rod, and in the length direction of the piston rod, the length of the waist-shaped hole is greater than the aperture of the first pin-through hole, and the width of the waist-shaped hole is equal to the aperture of the first pin-through hole;

[0019] The pin shaft passes through the first pin hole, the waist-shaped hole and the second pin hole in sequence.

[0020] In an exemplary embodiment of the present disclosure, the outer periphery of the second open end of the sliding sleeve is provided with a plurality of first arc-shaped splines distributed at circumferential intervals along the second open end, and the inner wall of the shell is provided with a plurality of arc-shaped key grooves distributed at circumferential intervals along the shell and extending axially along the shell; when the return spring is compressed or released, each of the first arc-shaped splines can move along different arc-shaped key grooves respectively.

[0021] In an exemplary embodiment of the present disclosure, a limit boss extending radially inward is provided at the end of the third open end of the shell, and when the reset spring is reset, the limit boss abuts against the end face of the first arc spline close to the front end cover assembly.

[0022] In an exemplary embodiment of the present disclosure, a limit plate is provided in the sliding sleeve, the limit plate extends radially of the sliding sleeve, the first electromagnetic induction component extends axially of the sliding sleeve, one end of the first electromagnetic induction component is connected to the limit plate, and the other end extends into the core.

[0023] In an exemplary embodiment of the present disclosure, the first electromagnetic induction component includes an iron core connecting rod, an iron core and a guide plug which are sequentially connected along the axial direction of the sliding sleeve, one end of the iron core connecting rod away from the iron core is connected to the limit plate, the iron core is a hollow structure, one end of the iron core is sleeved on the end of the iron core connecting rod away from the limit plate, and one end of the guide plug is connected to the end of the iron core away from the iron core connecting rod; the outer diameter of the iron core is smaller than the outer diameter of the guide plug.

[0024] In an exemplary embodiment of the present disclosure, the material of the iron core is a soft magnetic alloy, and the material of the guide plug is plastic.

[0025] In an exemplary embodiment of the present disclosure, the core assembly further includes:

[0026] A front pressure plate is sleeved in the sliding sleeve, the front pressure plate includes a first step hole and a plurality of second step holes, the first step hole includes an anti-transformation groove and a front center hole connected along the thickness direction of the front pressure plate; the second step hole includes a front limit groove and a front pressure plate through hole connected along the thickness direction of the front pressure plate; one end of the core body is connected to the front pressure plate through the front limit groove; the iron core connecting rod passes through the front pressure plate through hole and is arranged in the core body;

[0027] A pressure plate connecting rod, comprising a rod body and a triangular anti-rotation step arranged at one end of the rod body, the rod body passes through the front center hole, and the triangular anti-rotation step is clamped in the anti-rotation groove;

[0028] A rear pressure plate is located in the shell, and includes a rear center hole and a rear limit groove. The rear center hole is located on the bottom surface of the rear limit groove. The end of the rod body away from the triangular anti-rotation step is connected to the rear pressure plate through the rear center hole; the end of the core body away from the front limit groove is connected to the rear pressure plate through the rear limit groove.

[0029] In an exemplary embodiment of the present disclosure, the rear end cover assembly includes a connecting ear piece, and the connecting ear piece is connected to the aircraft body.

[0030] The brake command sensor disclosed in the present invention realizes multi-channel signal acquisition through the design of multiple first electromagnetic induction components and multiple corresponding second electromagnetic induction components in the core, which can effectively improve the reliability of the sensor. Even if a channel fails, other channels can still work normally, which can ensure the continuity and accuracy of the brake signal and solve the problem of low reliability of the single-channel design. At the same time, through the cooperation of the sliding sleeve and the core component, non-contact signal acquisition is realized. When the first electromagnetic induction component moves axially in the sliding sleeve, it generates electromagnetic induction with the second electromagnetic induction component in the core to generate a brake signal. This non-contact acquisition method can reduce mechanical wear, improve the stability of the sensor, and extend the service life of the sensor. In addition, the reset spring is sleeved on the outer periphery of the sliding sleeve, and the two ends are in contact with the cover body and the shell respectively, which can ensure that the sliding sleeve is accurately reset after being subjected to force, which not only improves the response speed of the sensor, but also enhances its anti-interference ability.

[0031] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0033] Figure 1 Schematic diagram of the structure of the brake command sensor in the embodiment of the present disclosure.

[0034] Figure 2 Schematic diagram of a fisheye joint in an embodiment of the present disclosure.

[0035] Figure 3 Schematic diagram of the front end cover in the embodiment of the present disclosure.

[0036] Figure 4 Schematic diagram of a push rod in an embodiment of the present disclosure.

[0037] Figure 5 Schematic diagram of the pin in the embodiment of the present disclosure.

[0038] Figure 6 It is a partial cross-sectional schematic diagram of the sliding sleeve in the embodiment of the present disclosure.

[0039] Figure 7 Schematic diagram of the core connecting rod in the embodiment of the present disclosure.

[0040] Figure 8 It is a cross-sectional view of the shell in the embodiment of the present disclosure.

[0041] Fig. 9 Schematic diagram of the coil distribution in the core in the embodiment of the present disclosure.

[0042] Fig.10 It is a cross-sectional schematic diagram of the front pressure plate in the embodiment of the present disclosure.

[0043] Fig.11 Schematic diagram of the pressure plate connecting rod in the embodiment of the present disclosure.

[0044] Fig.12 Schematic diagram of the rear pressure plate in the embodiment of the present disclosure.

[0045] Fig.13 Schematic diagram of the rear end cover assembly in the embodiment of the present disclosure.

[0046] Fig.14 It is a schematic diagram of the protective coil and the spherical bearing in the embodiment of the present disclosure.

[0047] In the figure: 1, front end cover assembly; 11, front end cover; 111, cover body; 1111, connecting hole; 112, connecting sleeve; 1121, first threaded hole; 113, disassembly groove; 12, fisheye joint; 121, front end connecting part; 1211, front end through hole; 122, piston rod; 1221, waist hole; 13, set screw; 14, push rod; 141, blind hole; 1411, first pin hole; 1412, second pin hole; 142, shaft shoulder; 143, Circlip groove; 15, idle travel spring; 16, pin shaft; 161, pin shaft through hole; 17, first cotter pin; 18, circlip; 19, flat washer; 2, sliding sleeve; 21, first open end; 22, second open end; 23, first electromagnetic induction component; 231, core connecting rod; 232, core; 233, guide plug; 234, round table; 235, first side through hole; 24, first arc spline; 26, limit plate; 261, sleeve step hole; 27, first Slotted nut; 28, second cotter pin; 3, housing; 31, third open end; 32, fourth open end; 33, arc keyway; 34, limit boss; 35, rear limit platform; 36, housing fuse hole; 4, reset spring; 5, core; 51, front pressure plate; 511, anti-rotation groove; 512, front center hole; 513, front limit groove; 514, front pressure plate through hole; 52, pressure plate connecting rod; 521, rod body; 522, triangular anti-rotation step; 523, second side Through hole on the surface; 53, rear pressure plate; 531, rear center hole; 532, rear limit groove; 533, cable lead-out groove; 534, second arc-shaped spline; 54, second slotted nut; 55, third cotter pin; 6, rear end cover assembly; 61, clamping ring; 62, cover plate; 621, wire outlet; 622, exhaust hole; 623, grounding wire screw hole; 63, connecting ear; 631, end cover fuse hole; 632, spherical bearing mounting hole; 64, protective coil; 65, spherical bearing. DETAILED DESCRIPTION

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0049] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0050] The terms "a", "an", "the" and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to indicate an open-ended inclusive meaning and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. The terms "first", "second", "third" and "fourth" are used only as labels and are not intended to limit the quantity of their objects.

[0051] Since the brake command sensor structure needs to have reciprocating telescopic motion, a slender push rod is often used for guidance. During the long-term operation of the sensor, the gap between the push rod and the matching hole will increase due to wear, causing the push rod to deviate from the ideal axis, which can easily cause the sensor to get stuck and fail. At the same time, most sensors use a single-channel design, which has insufficient redundancy and low reliability.

[0052] Based on this, the present disclosure provides a brake command sensor, such as Figure 1 As shown, the brake command sensor may include a front cover assembly 1, a sliding sleeve 2, a housing 3, a return spring 4, a core assembly (not shown in the figure) and a rear cover assembly 6, wherein:

[0053] The front end cover assembly 1 includes a front end cover 11 and a fisheye joint 12 connected to the front end cover 11, and the fisheye joint 12 is connected to the brake assembly; the front end cover 11 includes a cover body 111 and a connecting sleeve 112 connected to a side of the cover body 111 away from the fisheye joint 12;

[0054] The sliding sleeve 2 includes a first open end 21 and a second open end 22; the first open end 21 is connected to the outer periphery of the connecting sleeve 112; the second open end 22 is located on a side of the first open end 21 away from the fisheye connector 12; a plurality of first electromagnetic induction components 23 are disposed in the sliding sleeve 2;

[0055] The housing 3 includes a third open end 31 and a fourth open end 32, wherein the third open end 31 is sleeved on the outer periphery of the second open end 22; the fourth open end 32 is located on a side of the third open end 31 away from the first open end 21;

[0056] The return spring 4 is sleeved on the outer periphery of the sliding sleeve 2, and the two ends of the return spring 4 are in contact with the cover 111 and the third open end 31 respectively; compressing or releasing the return spring 4 can make the first electromagnetic induction component 23 in the sliding sleeve 2 move along the axial direction of the sliding sleeve 2;

[0057] The core assembly is at least partially sleeved in the second open end 22, and the remaining part is sleeved in the shell 3; the core assembly includes a plurality of cores 5, the core 5 is a hollow tubular structure, and the inner wall of the core 5 is provided with a second electromagnetic induction assembly (not shown in the figure); different first electromagnetic induction assemblies 23 are sleeved in different cores 5 in a one-to-one correspondence; when the first electromagnetic induction assembly 23 moves along the axial direction of the sliding sleeve 2, the first electromagnetic induction assembly 23 and the corresponding second electromagnetic induction assembly generate electromagnetic induction, which can convert the displacement into an electrical signal to generate a brake command;

[0058] The rear end cover assembly 6 is connected to the fourth open end 32 .

[0059] The brake command sensor disclosed in the present invention realizes multi-channel signal acquisition through the design of multiple first electromagnetic induction components 23 and multiple corresponding second electromagnetic induction components in the core body 5, which can effectively improve the reliability of the sensor. Even if a channel fails, other channels can still work normally, which can ensure the continuity and accuracy of the brake signal and solve the problem of low reliability of the single-channel design. At the same time, through the cooperation of the sliding sleeve 2 and the core body component, non-contact signal acquisition is realized. When the first electromagnetic induction component 23 moves axially in the sliding sleeve 2, it generates electromagnetic induction with the second electromagnetic induction component in the core body 5 to generate a brake signal. This non-contact acquisition method can reduce mechanical wear, prevent sensor jamming, improve the stability of the sensor, and extend the service life of the sensor. In addition, the reset spring 4 is sleeved on the outer periphery of the sliding sleeve 2, and the two ends are respectively in contact with the cover body 111 and the housing 3, which can ensure that the sliding sleeve 2 is accurately reset after being subjected to force, which not only improves the response speed of the sensor, but also enhances its anti-interference ability.

[0060] The following is a detailed description of the various parts and specific details of the brake command sensor disclosed in the present invention:

[0061] like Figure 1 As shown, the front end cover assembly 1 may include a front end cover 11 and a fisheye connector 12 connected to the front end cover 11, wherein the fisheye connector 12 is connected to the brake assembly. Figure 2As shown, the fisheye joint 12 may include a front end connection portion 121 and a piston rod 122 connected to each other, the front end connection portion 121 may be plate-shaped or block-shaped; the piston rod 122 is rod-shaped, and its cross section may be circular, elliptical or polygonal, and the shape of the piston rod 122 is not particularly limited. In some embodiments of the present disclosure, the piston rod 122 and the front end connection portion 121 may be an integrated structure, and the materials of the piston rod 122 and the front end connection portion 121 may both be aluminum alloy.

[0062] Please continue to see Figure 2 As shown, the front end connection part 121 may be provided with a front end through hole 1211, which may penetrate the front end connection part 121 in a direction perpendicular to the axial direction of the piston rod 122, and the fisheye joint 12 may be connected to the pedal connecting rod in the cockpit brake assembly through the front end through hole 1211. In an exemplary embodiment of the present disclosure, the piston rod 122 is provided with a waist-shaped hole 1221, which may be a through hole, for example, the waist-shaped hole 1221 may penetrate the piston rod 122 in a direction perpendicular to the axial direction of the piston rod 122.

[0063] In some embodiments of the present disclosure, Figure 3 As shown, the front end cover 11 may include a cover body 111 and a connecting sleeve 112. The cover body 111 and the connecting sleeve 112 may be an integrated structure, and the material may be made of high-strength, corrosion-resistant materials, such as aluminum alloy, stainless steel, etc.; the cover body 111 may be disc-shaped. A disassembly groove 113 is provided on the outer periphery of the cover body 111 to facilitate the installation of the cover body 111. The fisheye joint 12 may be connected to one end of the cover body 111. The connecting sleeve 112 may be cylindrical, one end of which may be connected to a side of the cover body 111 away from the fisheye joint 12, and the other end may extend to a side of the cover body 111 away from the fisheye joint 12. The connecting sleeve 112 may serve as a connection interface between the front end cover 11 and other mechanical components (for example, the sliding sleeve 2). The outer periphery of the connecting sleeve 112 may be provided with an external thread, and the connecting sleeve 112 may be connected to other components (for example, the sliding sleeve 2) through the external thread.

[0064] In an exemplary embodiment of the present disclosure, please continue to refer to Figure 3 As shown, the cover 111 is provided with a connection hole 1111, which can be a circular hole, an elliptical hole, a polygonal hole or a hole-like structure of an irregular shape, which is not particularly limited here. The connection hole 1111 can penetrate the cover 111 along the thickness direction of the cover 111.

[0065] In some embodiments of the present disclosure, Figure 1 , Figure 4 and Figure 5 As shown, the brake command sensor of the present disclosure may further include a push rod 14, an idle travel spring 15 and a pin 16, wherein:

[0066] like Figure 4 As shown, the push rod 14 may be in a rod shape and its material may be stainless steel. One end of the push rod 14 may be connected to the cover body 111 through the connecting hole 1111, and the other end extends to the side of the cover body 111 away from the connecting sleeve 112. For example, the connecting hole 1111 may be a stepped hole, and the end of the push rod 14 close to the cover body 111 is provided with a shaft shoulder 142 and a retaining spring groove 143; the push rod 14 may be installed from the side of the cover body 111 away from the connecting sleeve 112, so that the shaft shoulder 142 is aligned with the connecting hole 1111, and the retaining spring 18 is installed in the retaining spring groove 143 to prevent the push rod 14 from falling out.

[0067] Please continue to see Figure 4 As shown, the push rod 14 may have a blind hole 141, and the blind hole 141 may be recessed inward from the end of the push rod 14 away from the connecting sleeve 112; the side wall of the blind hole 141 is provided with a first pin hole 1411 and a second pin hole 1412 which are arranged opposite to each other and have equal apertures, and the first pin hole 1411 and the second pin hole 1412 may be through holes. The idle travel spring 15 may be arranged in the blind hole 141. One end of the piston rod 122 in the fisheye joint 12 may penetrate into the blind hole 141 and contact the idle travel spring 15 in the blind hole 141, and at this time, the waist-shaped hole 1221 on the piston rod 122 is aligned with the first pin hole 1411 and the second pin hole 1412 on the push rod 14. It should be noted that the piston rod 122 and the blind hole 141 are clearance-matched, and the piston rod 122 can slide back and forth relative to the inner wall of the blind hole 141. During the movement of the piston rod 122 relative to the blind hole 141, since the materials of the piston rod 122 and the inner wall of the blind hole 141 are different (the material of the piston rod 122 is aluminum alloy, and the material of the inner wall of the blind hole 141 is stainless steel), the two materials with different degrees of hardness match each other, which can prevent the piston rod 122 from sticking and jamming during movement, and help improve the reliability of the device.

[0068] In some embodiments of the present disclosure, in the length direction of the piston rod 122, the length of the waist-shaped hole 1221 is greater than the aperture of the first pin hole 1411, and the width of the waist-shaped hole 1221 is equal to the aperture of the first pin hole 1411. Figure 5 As shown in the figure, the pin 16 passes through the first pin hole 1411, the waist hole 1221 and the second pin hole 1412 in sequence. At this time, one end of the pin shaft 16 can abut against the surface of the push rod 14 and cover the outer periphery of the first pin hole 1411, and the other end can extend to the side of the second pin hole 1412 away from the first pin hole 1411.

[0069] In some embodiments of the present disclosure, please continue to refer to Figure 1 and Figure 5As shown, a pin shaft through hole 161 can also be provided in the pin shaft 16 at the end portion extending to the second pin hole 1412 away from the first pin hole 1411, so that the first cotter pin 17 can pass through the pin shaft through hole 161 and unfold to prevent the pin shaft 16 from coming out. The piston rod 122 in the fisheye joint 12 can compress the idle travel spring 15. At this time, only the idle travel spring 15 has a stroke, which will not affect the use of other components. When the reserved installation space for the sensor on the aircraft is inconsistent with the design, the idle travel can ensure that the sensor has adjustment space during installation.

[0070] like Figure 6 As shown, the sliding sleeve 2 may be cylindrical, and the shape of its cross section matches the shape of the connecting sleeve 112. For example, the cross sections of the sliding sleeve 2 and the connecting sleeve 112 may be circular. The material of the sliding sleeve 2 may be stainless steel. The sliding sleeve 2 may include a first open end 21 and a second open end 22 that are connected through; the first open end 21 is connected to the outer periphery of the connecting sleeve 112; and the second open end 22 is located on a side of the first open end 21 that is away from the fisheye joint 12. For example, the inner circumference of the first open end 21 of the sliding sleeve 2 is provided with an internal thread, and the connecting sleeve 112 and the sliding sleeve 2 may be connected through the external thread on the connecting sleeve 112 and the internal thread on the sliding sleeve 2.

[0071] In an exemplary embodiment of the present disclosure, a first threaded hole 1121 is provided on the connecting sleeve 112, and the first threaded hole 1121 can penetrate the side wall of the connecting sleeve 112 along a direction perpendicular to the axial direction of the connecting sleeve 112; at the same time, a second threaded hole is provided on the first open end 21, and the second threaded hole can penetrate the side wall of the first open end 21 along a direction perpendicular to the axial direction of the sliding sleeve 2; the aperture of the second threaded hole is equal to the aperture of the first threaded hole 1121;

[0072] Please continue to see Figure 1 As shown, the brake command sensor disclosed in the present invention may further include a set screw 13, which may pass through the second threaded hole and the first threaded hole 1121 at the same time, and be threadedly connected to the second threaded hole and the first threaded hole 1121. The set screw 13 may be used to perform secondary fixation on the sliding sleeve 2 and the connecting sleeve 112 to prevent loosening between the connecting sleeve 112 and the sliding sleeve 2 due to vibration or other external forces during the flight of the aircraft, thereby improving the structural reliability of the brake command sensor.

[0073] In an exemplary embodiment of the present disclosure, a plurality of first electromagnetic induction components 23 are provided in the sliding sleeve 2. The first electromagnetic induction components 23 may extend along the axial direction of the sliding sleeve 2, and the plurality of first electromagnetic induction components 23 may be evenly distributed along the circumference of the sliding sleeve 2. For example, the number of the first electromagnetic induction components 23 may be 2 to 5, for example, it may be 2, 3, 4 or 5.

[0074] In an exemplary embodiment of the present disclosure, please continue to refer to Figure 6 As shown, a limit plate 26 is provided in the sliding sleeve 2, and the limit plate 26 can extend in the radial direction of the sliding sleeve 2, that is, the limit plate 26 can extend in a direction perpendicular to the axial direction of the sliding sleeve 2, and one end of the first electromagnetic induction component 23 can be connected to the limit plate 26, and the other end can extend into the core 5. For example, the limit plate 26 is provided with a plurality of sleeve step holes 261 that penetrate the limit plate 26 along the thickness direction of the limit plate 26, and the plurality of sleeve step holes 261 can be distributed at intervals and evenly distributed in a ring shape. It should be noted that the number of the sleeve step holes 261 matches the number of the first electromagnetic induction components 23. For example, the number of the sleeve step holes 261 is the same as the number of the first electromagnetic induction components 23, for example, the number of the sleeve step holes 261 and the number of the first electromagnetic induction components 23 can both be 3.

[0075] In an exemplary embodiment of the present disclosure, please continue to refer to Figure 1 As shown, the first electromagnetic induction component 23 may include an iron core connecting rod 231, an iron core 232 and a guide plug 233 connected in sequence along the axial direction of the sliding sleeve 2, wherein one end of the iron core connecting rod 231 away from the iron core 232 is connected to the limit plate 26. Figure 7 As shown, the core connecting rod 231 may include a first end and a second end connected to each other, a truncated cone 234 is provided on the outer periphery of the first end, and a first side through hole 235 is provided on a portion of the first end located away from the truncated cone 234 and away from the second end, and the first side through hole 235 penetrates the core connecting rod 231 in a direction perpendicular to the axial direction of the core connecting rod 231. The first end may pass through the sleeve step hole 261 from the side of the sliding sleeve 2 away from the front end cover assembly 1, and the truncated cone 234 may abut against the step of the sleeve step hole 261. At this time, the first side through hole 235 is located outside the sleeve step hole 261, that is, the first side through hole 235 is located between the limiting plate 26 and the cover body 111, and the second end of the core connecting rod 231 is located on the side of the limiting plate 26 away from the cover body 111. A flat washer 19 and a first slotted nut 27 can be sleeved on the outer periphery of the area between the limit plate 26 and the cover body 111 at the first end, so that the second open pin 28 can pass through the first side through hole 235 and the first slotted nut 27 at the same time and unfold. The core connecting rod 231 can be fixedly connected to the limit plate 26 by the second open pin 28 and the first slotted nut 27. At the same time, the thread can be prevented from loosening by the setting of the second open pin 28, thereby further improving the structural reliability.

[0076] The material of the iron core 232 can be a soft magnetic material to facilitate excitation and demagnetization. Figure 1As shown, the iron core 232 may be a hollow structure, and one end of the iron core 232 is sleeved on the end of the iron core connecting rod 231 away from the limit plate 26. For example, the iron core 232 may be connected to the end of the iron core connecting rod 231 away from the limit plate 26 by a thread. The material of the guide plug 233 may be plastic, and one end of the guide plug 233 is connected to the end of the iron core 232 away from the iron core connecting rod 231, and the outer diameter of the iron core 232 is smaller than the outer diameter of the guide plug 233. For example, the guide plug 233 may be connected to the end of the iron core 232 away from the iron core connecting rod 231 by a thread. In an exemplary embodiment of the present disclosure, before installing the iron core 232, thread glue may be applied to the threads at both ends of the iron core 232 to prevent loosening between the iron core 232 and the guide plug 233 or between the iron core 232 and the iron core connecting rod 231.

[0077] like Figure 8 As shown, the housing 3 may be tubular, for example, it may be a cylinder. The housing 3 may include a third open end 31 and a fourth open end 32, and the third open end 31 may be sleeved on the outer periphery of the second open end 22 of the sliding sleeve 2 and overlap the second open end 22. The fourth open end 32 is located on a side of the third open end 31 away from the first open end 21. The material of the housing 3 may be an aluminum alloy, so that the housing 3 can reduce the overall weight while maintaining sufficient strength.

[0078] Please continue to see Figure 1 As shown, the reset spring 4 can be sleeved on the outer periphery of the sliding sleeve 2, and the two ends of the reset spring 4 are in contact with the cover body 111 and the third open end 31 respectively; compressing or releasing the reset spring 4 can make the sliding sleeve 2 move relative to the housing 3 along the axial direction of the housing 3, and in this process, the sliding sleeve 2 can drive the first electromagnetic induction component 23 inside it to move along the axial direction of the sliding sleeve 2. It should be noted that due to the different materials of the sliding sleeve 2 and the housing 3 (the material of the sliding sleeve 2 is stainless steel, and the material of the housing 3 is aluminum alloy), in the process of the sliding sleeve 2 moving relative to the housing 3, the combination of materials with different hardness can avoid adhesion and jamming, and can further improve the reliability of the brake command sensor. The present disclosure adopts an external large spring instead of a traditional internal small spring, which has a higher fatigue life, reduces the risk of sensor failure due to the spring, and is easy to observe; and the sensor disclosed in the present disclosure has a simple structure and is easy to disassemble and assemble.

[0079] In an exemplary embodiment of the present disclosure, please continue to refer to Figure 6As shown, the outer periphery of the second open end 22 of the sliding sleeve 2 is provided with a plurality of first arc-shaped splines 24 spaced apart along the circumference of the second open end 22. The surface of the first arc-shaped splines 24 can be arc-shaped and can be finely processed to make the surface smoother. The plurality of first arc-shaped splines 24 can be evenly distributed along the circumference of the sliding sleeve 2. For example, the number of the first arc-shaped splines 24 can be 2 to 5, for example, it can be 2, 3, 4 or 5. Of course, the number of the first arc-shaped splines 24 can also be other numbers, and the number of the first arc-shaped splines 24 is not specifically limited here.

[0080] In some embodiments of the present disclosure, the first arc-shaped splines 24 and the sliding sleeve 2 may be an integral structure, and the sliding sleeve 2 and the plurality of first arc-shaped splines 24 may be simultaneously formed by an integral molding process.

[0081] Please continue to see Figure 8 As shown, the inner wall of the housing 3 is provided with a plurality of arc-shaped key grooves 33 which are spaced apart along the circumference of the housing 3 and extend along the axial direction of the housing 3. The arc-shaped key grooves 33 can be matched with the first arc-shaped splines 24, that is, the first arc-shaped splines 24 can be clamped in the arc-shaped key grooves 33, and each first arc-shaped spline 24 can move along different arc-shaped key grooves 33 respectively (that is, the first arc-shaped splines 24 and the arc-shaped key grooves 33 are arranged with a gap), and during the movement, the first arc-shaped splines 24 can be mechanically limited by the arc-shaped key grooves 33, so as to prevent the sliding sleeve 2 from rotating circumferentially relative to the housing 3 during the reciprocating movement of the housing 3.

[0082] For example, the arc-shaped keyway 33 may be strip-shaped and may extend along the axial direction of the housing 3, and the inner surface of the arc-shaped keyway 33 may be a smooth curved surface. The number of the arc-shaped keyway 33 may be 2 to 5, for example, it may be 2, 3, 4 or 5. Of course, the number of the arc-shaped keyway 33 may also be other numbers, and the number of the arc-shaped keyway 33 is not specifically limited here. The number of the arc-shaped keyway 33 is the same as the number of the first arc-shaped spline 24, for example, the number of the arc-shaped keyway 33 and the first arc-shaped spline 24 may both be 2; or, the number of the arc-shaped keyway 33 and the first arc-shaped spline 24 may both be 3; or, the number of the arc-shaped keyway 33 and the first arc-shaped spline 24 may both be 4; or, the number of the arc-shaped keyway 33 and the first arc-shaped spline 24 may both be 5. When compressing or releasing the reset spring 4, each first arc-shaped spline 24 can move along the length direction of each arc-shaped keyway 33 in a one-to-one correspondence.

[0083] In an exemplary embodiment of the present disclosure, please continue to refer to Figure 3As shown, the end of the third open end 31 of the shell 3 is provided with a limiting boss 34 extending radially inward. The limiting boss 34 can be annular and can surround the inner circumference of the third open end 31 of the shell 3. When the reset spring 4 is reset, the limiting boss 34 abuts against the end face of the first arc spline 24 close to the front end cover assembly 1 to prevent the sliding sleeve 2 from falling out during the sliding process.

[0084] In an exemplary embodiment of the present disclosure, please continue to refer to Figure 8 As shown, a rear limit platform 35 is provided inside the fourth open end 32 of the shell 3, a shell rear thread is provided on the side of the rear limit platform 35 away from the third open end 31, and a plurality of shell fuse holes 36 are also provided on the end surface of the fourth open end 32.

[0085] Please continue to see Figure 1 As shown, at least part of the core assembly is sleeved in the second open end 22, and the remaining part is sleeved in the shell 3. That is, one end of the core assembly is sleeved in the second open end 22, and the other end extends into the shell 3. The core assembly may include a plurality of cores 5. For example, the number of cores 5 may be 2 to 5, for example, it may be 2, 3, 4 or 5. It should be noted that the number of cores 5 may match the number of first electromagnetic induction assemblies 23. For example, the number of cores 5 may be the same as the number of first electromagnetic induction assemblies 23. The core 5 may be a hollow structure, for example, the core 5 may be cylindrical, and the inner wall of the core 5 may be provided with a second electromagnetic induction assembly; different first electromagnetic induction assemblies 23 may be sleeved in different cores 5 in a one-to-one correspondence; when the first electromagnetic induction assembly 23 moves along the axial direction of the sliding sleeve 2, the first electromagnetic induction assembly 23 and the corresponding second electromagnetic induction assembly generate electromagnetic induction to generate a brake signal. In the above process, since the outer diameter of the guide plug 233 is larger than the outer diameter of the iron core 232, and the inner diameter of the core 5 is larger than the outer diameter of the guide plug 233, when the first electromagnetic induction component 23 moves along the axial direction of the core 5, there is a gap between the iron core 232 and the inner wall of the core 5, and no unnecessary friction will be generated between the iron core 232 and the inner wall of the core 5, and the iron core 232 will not be damaged, which helps to extend the service life of the brake command sensor. At the same time, since the material of the guide plug 233 is plastic, the friction between it and the inner wall of the core 5 is small, so that the guide plug 233 can slide smoothly along the inner wall of the core 5 without getting stuck.

[0086] In the present disclosure, through the design of multiple first electromagnetic induction components 23 and multiple corresponding second electromagnetic induction components in the core 5, multi-channel signal acquisition is achieved, which can effectively improve the reliability of the sensor. Even if a channel fails, other channels can still work normally, which can ensure the continuity and accuracy of the brake signal and solve the problem of low reliability of single-channel design. At the same time, through the cooperation of the sliding sleeve 2 and the core component, non-contact signal acquisition is achieved.

[0087] In some embodiments of the present disclosure, three coils are arranged inside the core 5, and each coil can be led out by two wires. Among them, one coil is a primary coil arranged in the middle of the length direction of the core 5, and the other two are secondary coils arranged symmetrically at both ends of the length direction of the core 5. The spatial layout of the coils and the iron core 232 is as follows: Fig. 9 As shown; when the sensor is working, the primary coil is energized to excite the iron core 232. When the excited iron core 232 moves left and right in the internal space of the core body 5, the two secondary coils will generate an induced voltage. The voltage magnitude is related to the position of the iron core 232. When the iron core 232 is to the left, the voltage of the secondary coil 1 is large and the voltage of the secondary coil 2 is small. When the iron core 232 is to the right, the voltage of the secondary coil 1 is small and the voltage of the secondary coil 2 is large. The position of the iron core 232 in the core body 5 can be calculated through the voltage difference between the two secondary coils, thereby obtaining the angle at which the pilot steps on the pedal to obtain a brake signal.

[0088] In an exemplary embodiment of the present disclosure, the core assembly may further include a front pressing plate 51, a pressing plate connecting rod 52 and a rear pressing plate 53, wherein:

[0089] like Fig.10 As shown, the front pressure plate 51 may be disc-shaped, and the front pressure plate 51 is sleeved in the sliding sleeve 2 , and there is a large gap between the inner circumferential surface of the sliding sleeve 2 and the outer circumferential surface of the front pressure plate 51 to ensure that the sliding sleeve 2 can reciprocate in the housing 3 .

[0090] In an exemplary embodiment of the present disclosure, the front pressing plate 51 may include a first step hole and a plurality of second step holes. Fig.10As shown, the first step hole includes an anti-transformation groove 511 and a front center hole 512 that are connected along the thickness direction of the front pressure plate 51. Among them, the anti-transformation groove 511 is located on the side of the front center hole 512 away from the shell 3, and the front center hole 512 is located in the central area of ​​the front pressure plate 51. The second step hole includes a front limit groove 513 and a front pressure plate through hole 514 that are connected along the thickness direction of the front pressure plate 51. The front limit groove 513 is located on the side of the front center hole 512 close to the shell 3, and one end of the core body 5 is connected to the front pressure plate 51 through the front limit groove 513; the core connecting rod 231 can pass through the front pressure plate through hole 514 and then be inserted into the core body 5. The number of the second step holes can be multiple, for example, the number of the second step holes is the same as the number of the core bodies 5, and each core body 5 can be connected to the front pressure plate 51 through each front limit groove 513 in a one-to-one correspondence. For example, the core body 5 can be interference fit with the front limit groove 513.

[0091] like Fig.11 As shown, the pressure plate connecting rod 52 may include a rod body 521 and a triangular anti-rotation step 522 provided at one end of the rod body 521. The outer periphery of the end of the rod body 521 away from the triangular anti-rotation step 522 is provided with a rear end thread, and the side of the rear end thread is provided with a second side through hole 523. The rod body 521 can pass through the front center hole 512 from the side of the front pressure plate 51 away from the housing 3. At this time, the triangular anti-rotation step 522 can be clamped in the anti-rotation groove 511, thereby locking the rotation between the front pressure plate 51 and the pressure plate connecting rod 52, which can improve the structural stability and reliability.

[0092] like Fig.12 As shown, the rear pressure plate 53 may also be disc-shaped, and the rear pressure plate 53 is located in the housing 3. The rear pressure plate 53 includes a rear center hole 531 and a rear limit groove 532. The rear limit groove 532 may be defined by three second arc-shaped splines 534 provided on the surface of the rear pressure plate 53 close to the front pressure plate 51. The rear center hole 531 is located in the central area of ​​the bottom surface of the rear limit groove 532. The rear pressure plate 53 may be installed from the side of the housing 3 away from the sliding sleeve 2, so that the end of the core body 5 away from the front limit groove 513 is connected to the rear pressure plate 53 through the rear limit groove 532, that is, the end of the core body 5 away from the front limit groove 513 can be inserted into the rear limit groove 532. At this time, the end of the rod body 521 away from the triangular anti-rotation step 522 can be connected to the rear pressure plate 53 through the rear center hole 531 (that is, the end of the rod body 521 away from the triangular anti-rotation step 522 can pass through the rear center hole 531).

[0093] In an exemplary embodiment of the present disclosure, after the pressure plate connecting rod 52 passes through the rear center hole 531, a second slotted nut 54 may be sleeved on its end, and the second slotted nut 54 may be threadedly connected to the end of the rod body 521. In some embodiments of the present disclosure, a third cotter pin 55 may be used to pass through the second slotted nut 54 and the second side through hole 523 of the pressure plate connecting rod 52 and then be deployed, and then the third cotter pin 55 and the second slotted nut 54 may be used to prevent the thread from loosening.

[0094] In some embodiments of the present disclosure, please continue to refer to Fig.12 As shown, the rear pressing plate 53 is further provided with a plurality of cable lead-out grooves 533 , which may be U-shaped grooves that may be recessed from the edge of the rear pressing plate 53 to the inside. The wires in each core body 5 may be led out through the cable lead-out grooves 533 .

[0095] The rear end cover assembly 6 can be connected to the fourth open end 32. Fig.13 As shown, the rear end cover assembly 6 may include a clamping ring 61 and a cover plate 62 covering the side of the clamping ring 61 away from the sliding sleeve 2, wherein the clamping ring 61 may be cylindrical and have an external thread on the outside, and the clamping ring 61 may be sleeved in the fourth open end 32 of the housing 3 and connected to the fourth open end 32 by a thread. The cover plate 62 is provided with a wire outlet 621, an exhaust hole 622 and a grounding wire screw hole 623. Fig.14 As shown, a protective coil 64 may be provided in the wire outlet 621 , and the wire passing through the cable outlet groove 533 may be led out of the brake command sensor through the wire outlet 621 .

[0096] In some embodiments of the present disclosure, please continue to refer to Fig.13 and Fig.14 As shown, the rear end cover assembly 6 may also include a connecting ear piece 63, which may be connected to the body of the aircraft. The connecting ear piece 63 may be fixed to the side of the cover plate 62 away from the sliding sleeve 2, and is vertically distributed with the cover plate 62. Two end cover fuse holes 631 are provided at the end of the connecting ear piece 63 close to the cover plate 62, and a fuse may be provided between the end cover fuse hole 631 and the housing fuse hole 36 to prevent the structure from loosening. A joint bearing mounting hole 632 is provided at the end of the connecting ear piece 63 away from the cover plate 62, and the joint bearing 65 is inserted into the joint bearing mounting hole 632 through an interference fit, and the connecting ear piece 63 can be connected to the aircraft body through the joint bearing 65, and under the action of the joint bearing 65, the command sensor can still be installed and work normally when the installation position error is large.

[0097] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A brake command sensor, characterized in that: include: A front end cover assembly, comprising a front end cover and a fisheye joint connected to the front end cover, wherein the fisheye joint is connected to the brake assembly; the front end cover comprises a cover body and a connecting sleeve connected to a side of the cover body away from the fisheye joint; The sliding sleeve comprises a first open end and a second open end; the first open end is connected to the outer periphery of the connecting sleeve; the second open end is located at a side of the first open end away from the fisheye joint; a plurality of first electromagnetic induction components are arranged in the sliding sleeve; The housing comprises a third open end and a fourth open end which are connected to each other, wherein the third open end is sleeved on the outer periphery of the second open end; and the fourth open end is located on a side of the third open end away from the first open end; A return spring is sleeved on the outer circumference of the sliding sleeve, and two ends of the return spring are in contact with the cover body and the third open end respectively; compressing or releasing the return spring can make the first electromagnetic induction component in the sliding sleeve move along the axial direction of the sliding sleeve; A core assembly, at least part of which is sleeved in the second open end, and the rest of which is sleeved in the shell; the core assembly includes a plurality of cores, the cores are hollow tubular structures, and the inner wall of the cores is provided with a second electromagnetic induction assembly; different first electromagnetic induction assemblies are sleeved in different cores in a one-to-one correspondence; when the first electromagnetic induction assembly moves along the axial direction of the sliding sleeve, the first electromagnetic induction assembly and the corresponding second electromagnetic induction assembly generate electromagnetic induction, and the displacement can be converted into an electrical signal to generate a brake command; A rear end cover assembly is connected to the fourth open end.

2. The brake command sensor according to claim 1, characterized in that: The outer circumference of the connecting sleeve is provided with an external thread, the inner circumference of the first open end is provided with an internal thread, and the connecting sleeve is connected to the sliding sleeve through the external thread and the internal thread; The connecting sleeve is provided with a first threaded hole, which penetrates the side wall of the connecting sleeve along a direction perpendicular to the axial direction of the connecting sleeve; the first open end is provided with a second threaded hole, which penetrates the side wall of the first open end along a direction perpendicular to the axial direction of the sliding sleeve; the aperture of the second threaded hole is equal to the aperture of the first threaded hole; The brake command sensor further includes a set screw, which passes through the second threaded hole and the first threaded hole in sequence and is threadedly connected to the second threaded hole and the first threaded hole.

3. The brake command sensor according to claim 1, characterized in that: The cover body is provided with a connecting hole; the brake command sensor further comprises: A push rod, one end of which is connected to the cover body through the connecting hole, and the other end of which extends to the side of the cover body away from the connecting sleeve; the push rod has a blind hole, which is recessed inward from the end of the push rod away from the connecting sleeve; a first pin hole and a second pin hole which are arranged opposite to each other and have the same aperture are provided on the side wall of the blind hole; An idle travel spring is arranged in the blind hole; The fisheye joint comprises a front connecting portion and a piston rod connected to each other, the piston rod penetrates into the blind hole and contacts the idle travel spring, and the front connecting portion is connected to the brake assembly; a waist-shaped hole is provided on the piston rod, and in the length direction of the piston rod, the length of the waist-shaped hole is greater than the aperture of the first pin-through hole, and the width of the waist-shaped hole is equal to the aperture of the first pin-through hole; The pin shaft passes through the first pin hole, the waist-shaped hole and the second pin hole in sequence.

4. The brake command sensor according to claim 1, characterized in that: The outer periphery of the second open end of the sliding sleeve is provided with a plurality of first arc-shaped splines distributed at intervals in the circumferential direction of the second open end, and the inner wall of the shell is provided with a plurality of arc-shaped key grooves distributed at intervals in the circumferential direction of the shell and extending along the axial direction of the shell; when the return spring is compressed or released, each of the first arc-shaped splines can move along different arc-shaped key grooves respectively.

5. The brake command sensor according to claim 4, characterized in that: The end of the third open end of the shell is provided with a limiting boss extending radially inwardly. When the reset spring is reset, the limiting boss abuts against the end surface of the first arc-shaped spline close to the front end cover assembly.

6. The brake command sensor according to claim 1, characterized in that: A limit plate is provided in the sliding sleeve, and the limit plate extends in the radial direction of the sliding sleeve. The first electromagnetic induction component extends in the axial direction of the sliding sleeve, and one end of the first electromagnetic induction component is connected to the limit plate, and the other end extends into the core.

7. The brake command sensor according to claim 6, characterized in that: The first electromagnetic induction component includes an iron core connecting rod, an iron core and a guide plug which are connected in sequence along the axial direction of the sliding sleeve, one end of the iron core connecting rod away from the iron core is connected to the limit plate, the iron core is a hollow structure, one end of the iron core is sleeved on the end of the iron core connecting rod away from the limit plate, and one end of the guide plug is connected to the end of the iron core away from the iron core connecting rod; the outer diameter of the iron core is smaller than the outer diameter of the guide plug.

8. The brake command sensor according to claim 7, characterized in that: The material of the iron core is a soft magnetic alloy, and the material of the guide plug is plastic.

9. The brake command sensor according to claim 7, characterized in that: The core assembly also includes: A front pressure plate is sleeved in the sliding sleeve, the front pressure plate includes a first step hole and a plurality of second step holes, the first step hole includes an anti-transformation groove and a front center hole connected along the thickness direction of the front pressure plate; the second step hole includes a front limit groove and a front pressure plate through hole connected along the thickness direction of the front pressure plate; one end of the core body is connected to the front pressure plate through the front limit groove; the iron core connecting rod passes through the front pressure plate through hole and is arranged in the core body; A pressure plate connecting rod, comprising a rod body and a triangular anti-rotation step arranged at one end of the rod body, the rod body passes through the front center hole, and the triangular anti-rotation step is clamped in the anti-rotation groove; A rear pressure plate is located in the shell, and includes a rear center hole and a rear limit groove. The rear center hole is located on the bottom surface of the rear limit groove. The end of the rod body away from the triangular anti-rotation step is connected to the rear pressure plate through the rear center hole; the end of the core body away from the front limit groove is connected to the rear pressure plate through the rear limit groove.

10. The brake command sensor according to claim 7, characterized in that: The rear end cover assembly comprises a connecting ear piece, and the connecting ear piece is connected to the aircraft body.

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