Brake command sensor

Abstract

The utility model 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] This disclosure relates to the field of aircraft braking system technology, and more specifically, to a braking command sensor. Background Technology

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

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] This disclosure provides a brake command sensor that improves structural reliability.

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

[0006] A front cover assembly includes a front cover and a fisheye connector connected to the front cover, the fisheye connector being connected to a brake assembly; the front cover includes a cover body and a connecting sleeve connected to the side of the cover body away from the fisheye connector.

[0007] A sliding sleeve includes a first open end and a second open end that pass through the sleeve; the first open end is connected to the outer periphery of the connecting sleeve; the second open end is located on the side of the first open end away from the fisheye connector; the sliding sleeve is provided with a plurality of first electromagnetic induction components;

[0008] The housing includes a through third open end and a fourth open end, wherein the third open end is sleeved on the outer periphery of the second open end; the fourth open end is located on the side of the third open end away from the first open end;

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

[0010] The core assembly is at least partially fitted inside the second open end, with the remaining portion fitted inside the housing; the core assembly includes multiple cores, each core being a hollow tubular structure, and a second electromagnetic induction component is provided on the inner wall of the core; different first electromagnetic induction components are fitted one-to-one inside different cores; when the first electromagnetic induction component moves along the axial direction of the sliding sleeve, the first electromagnetic induction component and its corresponding second electromagnetic induction component undergo electromagnetic induction, which can convert the displacement into an electrical signal to generate a braking command;

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

[0012] In an exemplary embodiment of this disclosure, the outer peripheral surface of the connecting sleeve is provided with an external thread, and the inner peripheral surface of the first open end is provided with an internal thread. 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 in a direction perpendicular to the axial direction of the connecting sleeve; the first open end is provided with a second threaded hole, which is provided in the side wall of the first open end in a direction perpendicular to the axial direction of the sliding sleeve; the diameter of the second threaded hole is equal to the diameter of the first threaded hole.

[0014] The brake command sensor also 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 one exemplary embodiment of this disclosure, the cover is provided with a connection hole; the brake command sensor further includes:

[0016] A push rod, one end of which is connected to the cover through the connecting hole, and the other end of which extends toward the cover 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; the sidewall of the blind hole is provided with a first through hole and a second through hole that are opposite to each other and have the same diameter.

[0017] An idle stroke spring is provided inside the blind hole;

[0018] The fisheye connector includes a front end connecting part and a piston rod that are connected to each other. The piston rod extends into the blind hole and contacts the free travel spring. The front end connecting part is connected to the brake assembly. The piston rod is provided with a waist-shaped hole. In the length direction of the piston rod, the length of the waist-shaped hole is greater than the diameter of the first through-pin hole, and the width of the waist-shaped hole is equal to the diameter of the first through-pin hole.

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

[0020] In an exemplary embodiment of this disclosure, the outer periphery of the second open end of the sliding sleeve is provided with a plurality of first arc-shaped splines spaced circumferentially along the second open end, and the inner wall of the housing is provided with a plurality of arc-shaped keyways spaced circumferentially along the housing and extending axially along the housing; when the reset spring is compressed or released, each of the first arc-shaped splines can move along different arc-shaped keyways respectively.

[0021] In an exemplary embodiment of this disclosure, the end of the third open end of the housing is provided with a limiting boss extending radially inward. When the reset spring is reset, the limiting boss abuts against the end face of the first arc spline near the front end cover assembly.

[0022] In an exemplary embodiment of this disclosure, a limiting plate is provided inside the sliding sleeve, the limiting plate extends radially along the sliding sleeve, the first electromagnetic induction component extends axially along the sliding sleeve, and one end of the first electromagnetic induction component is connected to the limiting plate, while the other end extends into the core body.

[0023] In an exemplary embodiment of this disclosure, the first electromagnetic induction component includes an iron core connecting rod, an iron core, and a guide plug connected sequentially 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 limiting 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 limiting plate. 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 one exemplary embodiment of this disclosure, the iron core is made of a soft magnetic alloy, and the guide plug is made of plastic.

[0025] In one exemplary embodiment of this disclosure, the core assembly further includes:

[0026] A front pressure plate is fitted inside the sliding sleeve. The front pressure plate includes a first stepped hole and multiple second stepped holes. The first stepped hole includes an anti-rotation groove and a front center hole that are aligned along the thickness direction of the front pressure plate. The second stepped holes include a front limiting groove and a front pressure plate through hole that are aligned along the thickness direction of the front pressure plate. One end of the core is connected to the front pressure plate through the front limiting groove. The iron core connecting rod passes through the through hole of the front pressure plate and is inserted into the core.

[0027] The pressure plate connecting rod includes a rod body and a triangular anti-rotation step provided at one end of the rod body. The rod body passes through the front center hole, and the triangular anti-rotation step is engaged in the anti-rotation groove.

[0028] The rear pressure plate is located inside the housing. The rear pressure plate includes a rear center hole and a rear limiting groove. The rear center hole is located on the bottom surface of the rear limiting 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 limiting groove is connected to the rear pressure plate through the rear limiting groove.

[0029] In one exemplary embodiment of this disclosure, the rear cover assembly includes a connecting lug that is connected to the aircraft fuselage.

[0030] The brake command sensor disclosed herein achieves multi-channel signal acquisition through the design of multiple first electromagnetic induction components and corresponding multiple second electromagnetic induction components within the core, effectively improving the sensor's reliability. Even if one channel fails, the other channels can still operate normally, ensuring the continuity and accuracy of the brake signal and solving the problem of low reliability in single-channel designs. Simultaneously, the cooperation between the sliding sleeve and the core components enables non-contact signal acquisition. When the first electromagnetic induction component moves axially within the sliding sleeve, it induces electromagnetic induction with the second electromagnetic induction components within the core, generating a brake signal. This non-contact acquisition method reduces mechanical wear, improves sensor stability, and extends sensor lifespan. Furthermore, a return spring is sleeved on the outer circumference of the sliding sleeve, with its two ends contacting the cover and housing respectively, ensuring accurate reset of the sliding sleeve after being subjected to force. This not only improves the sensor's response speed but also enhances its anti-interference capability.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0033] Figure 1 This is a schematic diagram of the brake command sensor in an embodiment of this disclosure.

[0034] Figure 2 This is a schematic diagram of a fisheye connector in an embodiment of this disclosure.

[0035] Figure 3 This is a schematic diagram of the front cover in an embodiment of this disclosure.

[0036] Figure 4 This is a schematic diagram of the push rod in an embodiment of this disclosure.

[0037] Figure 5 This is a schematic diagram of the pin shaft in an embodiment of this disclosure.

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

[0039] Figure 7 This is a schematic diagram of the iron core connecting rod in an embodiment of this disclosure.

[0040] Figure 8 This is a cross-sectional view of the housing in an embodiment of this disclosure.

[0041] Figure 9 This is a schematic diagram of the coil distribution within the core in an embodiment of this disclosure.

[0042] Figure 10 This is a cross-sectional schematic diagram of the front pressure plate in an embodiment of this disclosure.

[0043] Figure 11 This is a schematic diagram of the pressure plate connecting rod in an embodiment of this disclosure.

[0044] Figure 12 This is a schematic diagram of the rear pressure plate in an embodiment of this disclosure.

[0045] Figure 13 This is a schematic diagram of the back cover assembly in an embodiment of this disclosure.

[0046] Figure 14 This is a schematic diagram of the retaining coil and the joint bearing in an embodiment of this disclosure.

[0047] In the diagram: 1. Front cover assembly; 11. Front cover; 111. Cover body; 1111. Connecting hole; 112. Connecting sleeve; 1121. First threaded hole; 113. Disassembly / assembly groove; 12. Fisheye connector; 121. Front connecting part; 1211. Front through hole; 122. Piston rod; 1221. Waist-shaped hole; 13. Set screw; 14. Push rod; 141. Blind hole; 1411. First through pin hole; 1412. Second through pin hole; 142. Shoulder; 143. 15. Snap ring groove; 16. Free travel spring; 17. Pin; 18. Pin through hole; 19. First cotter pin; 20. Snap ring; 21. Flat washer; 22. Sliding sleeve; 23. First open end; 24. Second open end; 25. First electromagnetic induction assembly; 26. Iron core connecting rod; 27. Iron core; 28. Guide plug; 29. ​​Frustum; 20. First side through hole; 21. First arc spline; 22. Limiting plate; 23. Sleeve stepped hole; 24. First... 28. Slotted nut; 3. Second cotter pin; 4. Housing; 5. Third open end; 6. Fourth open end; 7. Arc-shaped keyway; 8. Limiting boss; 9. Rear limiting platform; 10. Housing fuse hole; 11. Return spring; 12. Core; 13. Front pressure plate; 14. Anti-rotation groove; 15. Front center hole; 26. Front limiting groove; 37. Front pressure plate through hole; 48. Pressure plate connecting rod; 59. Rod body; 20. Triangular anti-rotation step; 21. Second side 53. Through hole; 53. Rear pressure plate; 531. Rear center hole; 532. Rear limit groove; 533. Cable lead-out groove; 534. Second arc spline; 54. Second slotted nut; 55. Third cotter pin; 6. Rear end cover assembly; 61. Pressure ring; 62. Cover plate; 621. Cable outlet; 622. Vent hole; 623. Ground wire screw hole; 63. Connecting lug; 631. End cover fuse hole; 632. Spherical bearing mounting hole; 64. Protective coil; 65. Spherical bearing. Detailed Implementation

[0048] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

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

[0050] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and that other elements / components / etc. may exist in addition to those listed. The terms “first,” “second,” “third,” and “fourth” are used only as markers and are not a limitation on the number of objects.

[0051] Because the structure of the brake command sensor needs to have reciprocating telescopic motion, a slender push rod is often used for guidance. During long-term operation of the sensor, wear will cause the gap between the push rod and the mating hole to increase, which will cause the push rod to deviate from the ideal axis, easily causing the sensor to jam 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 braking 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 cover assembly 1 includes a front cover 11 and a fisheye connector 12 connected to the front cover 11. The fisheye connector 12 is connected to the brake assembly. The front cover 11 includes a cover body 111 and a connecting sleeve 112 connected to the side of the cover body 111 away from the fisheye connector 12.

[0054] The sliding sleeve 2 includes a through 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 the side of the first open end 21 away from the fisheye connector 12; the sliding sleeve 2 is provided with a plurality of first electromagnetic induction components 23;

[0055] The housing 3 includes a through third open end 31 and a fourth open end 32. 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 the 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 cause the first electromagnetic induction component 23 inside the sliding sleeve 2 to move along the axial direction of the sliding sleeve 2.

[0057] The core assembly is at least partially fitted inside the second open end 22, and the remaining part is fitted inside the housing 3; the core assembly includes multiple cores 5, each core 5 being a hollow tubular structure, and the inner wall of the core 5 is provided with a second electromagnetic induction component (not shown in the figure); different first electromagnetic induction components 23 are fitted one-to-one inside different cores 5; when the first electromagnetic induction component 23 moves along the axial direction of the sliding sleeve 2, the first electromagnetic induction component 23 and its corresponding second electromagnetic induction component undergo electromagnetic induction, which can convert the displacement into an electrical signal to generate a braking command;

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

[0059] The brake command sensor disclosed herein achieves multi-channel signal acquisition through the design of multiple first electromagnetic induction components 23 and corresponding second electromagnetic induction components within multiple cores 5. This effectively improves the reliability of the sensor; even if one channel fails, other channels can still operate normally, ensuring the continuity and accuracy of the brake signal and solving the problem of low reliability in single-channel designs. Simultaneously, non-contact signal acquisition is achieved through the cooperation of the sliding sleeve 2 and the core components. When the first electromagnetic induction component 23 moves axially within the sliding sleeve 2, it induces electromagnetic induction with the second electromagnetic induction components within the core 5, generating a brake signal. This non-contact acquisition method reduces mechanical wear, prevents sensor jamming, improves sensor stability, and extends sensor lifespan. Furthermore, the return spring 4 is sleeved on the outer periphery of the sliding sleeve 2, with its two ends contacting the cover 111 and the housing 3 respectively. This ensures that the sliding sleeve 2 accurately resets after being subjected to force, improving not only the sensor's response speed but also its anti-interference capability.

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

[0061] like Figure 1 As shown, the front cover assembly 1 may include a front cover 11 and a spherical connector 12 connected to the front cover 11, wherein the spherical connector 12 is connected to the brake assembly. Figure 2As shown, the fisheye connector 12 may include a front-end connecting portion 121 and a piston rod 122 connected to each other. The front-end connecting 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. No particular limitation is made to the shape of the piston rod 122 here. In some embodiments of this disclosure, the piston rod 122 and the front-end connecting portion 121 may be an integral structure, and both the piston rod 122 and the front-end connecting portion 121 may be made of aluminum alloy.

[0062] Please continue reading Figure 2 As shown, the front connecting portion 121 may be provided with a front through hole 1211. The front through hole 1211 can penetrate the front connecting portion 121 in a direction perpendicular to the axial direction of the piston rod 122, and the fisheye connector 12 can be connected to the foot pedal linkage in the cockpit brake assembly through the front through hole 1211. In an exemplary embodiment of this disclosure, the piston rod 122 is provided with a waist-shaped hole 1221. The waist-shaped hole 1221 may be a through hole. For example, the waist-shaped hole 1221 can penetrate the piston rod 122 in a direction perpendicular to the axial direction of the piston rod 122.

[0063] In some embodiments of this disclosure, such as Figure 3 As shown, the front 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 integral structure, and the material may be made of high-strength, corrosion-resistant materials, such as aluminum alloy or stainless steel. 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. A fisheye connector 12 may be connected to one end of the cover body 111. The connecting sleeve 112 may be cylindrical, with one end connected to the side of the cover body 111 away from the fisheye connector 12, and the other end extending towards the side of the cover body 111 away from the fisheye connector 12. The connecting sleeve 112 may serve as a connection interface between the front cover 11 and other mechanical components (e.g., sliding sleeve 2). The outer periphery of the connecting sleeve 112 may be provided with external threads, through which the connecting sleeve 112 can be connected to other components (e.g., sliding sleeve 2).

[0064] In one exemplary embodiment of this disclosure, please continue to refer to Figure 3 As shown, the cover 111 is provided with a connecting hole 1111. The connecting hole 1111 can be a round hole, an elliptical hole, a polygonal hole, or an irregularly shaped hole structure, and no special limitation is made here. The connecting hole 1111 can penetrate the cover 111 along the thickness direction of the cover 111.

[0065] In some embodiments of this disclosure, such as Figure 1 , Figure 4 and Figure 5 As shown, the brake command sensor disclosed herein may further include a push rod 14, a free-travel spring 15, and a pin 16, wherein:

[0066] like Figure 4 As shown, the push rod 14 can be rod-shaped and made of stainless steel. One end of the push rod 14 can be connected to the cover 111 through the connecting hole 1111, and the other end extends towards the side of the cover 111 away from the connecting sleeve 112. For example, the connecting hole 1111 can be a stepped hole, and the end of the push rod 14 near the cover 111 is provided with a shoulder 142 and a retaining ring groove 143; the push rod 14 can be installed from the side of the cover 111 away from the connecting sleeve 112, so that after the shoulder 142 is aligned with the connecting hole 1111, the retaining ring 18 is installed into the retaining ring groove 143 to prevent the push rod 14 from coming out.

[0067] Please continue reading Figure 4 As shown, the push rod 14 may have a blind hole 141, which is recessed inward from the end of the push rod 14 away from the connecting sleeve 112. The side wall of the blind hole 141 has a first through hole 1411 and a second through hole 1412 that are oppositely distributed and have the same diameter. Both the first through hole 1411 and the second through hole 1412 can be through holes. The free stroke spring 15 can be provided in the blind hole 141. One end of the piston rod 122 in the fisheye connector 12 can penetrate into the blind hole 141 and contact the free stroke spring 15 in the blind hole 141. At this time, the waist-shaped hole 1221 on the piston rod 122 is aligned with the first through hole 1411 and the second through hole 1412 on the push rod 14. It should be noted that the piston rod 122 and the blind hole 141 are clearance-fitted, 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, the piston rod 122 and the inner wall of the blind hole 141 are made of different materials (the piston rod 122 is made of aluminum alloy and the inner wall of the blind hole 141 is made of stainless steel). This allows the two materials with different hardness to match each other, which can prevent the piston rod 122 from sticking or jamming during the movement and helps to improve the reliability of the device.

[0068] In some embodiments of this disclosure, along the length of the piston rod 122, the length of the oblong hole 1221 is greater than the diameter of the first through hole 1411, and the width of the oblong hole 1221 is equal to the diameter of the first through hole 1411. The pin 16 (e.g.) can then be inserted into the through hole. Figure 5 As shown, the pin 16 passes through the first through hole 1411, the waist-shaped hole 1221 and the second through hole 1412 in sequence. At this time, one end of the pin 16 can abut against the surface of the push rod 14 and cover the outer periphery of the first through hole 1411, while the other end can extend to the side of the second through hole 1412 away from the first through hole 1411.

[0069] Please refer to some embodiments of this disclosure. Figure 1 and Figure 5As shown, a pin through hole 161 can also be opened at the end of the pin 16 extending to the side of the second pin hole 1412 away from the first pin hole 1411, allowing the first cotter pin 17 to pass through the pin through hole 161 and unfold, thus preventing the pin 16 from coming out. The piston rod 122 in the fisheye connector 12 can compress the free travel spring 15. At this time, only the free travel spring 15 has travel, which will not affect the use of other components. When the reserved installation space for the sensor on the aircraft deviates from the design, the free travel can ensure that the sensor has adjustment space during installation.

[0070] like Figure 6 As shown, the sliding sleeve 2 can be cylindrical, and its cross-sectional shape matches the shape of the connecting sleeve 112. For example, both the sliding sleeve 2 and the connecting sleeve 112 can have circular cross-sections. The material of the sliding sleeve 2 can be stainless steel. The sliding sleeve 2 may include a through 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 the side of the first open end 21 away from the fisheye connector 12. For example, the inner circumferential surface 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 can 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 this disclosure, the connecting sleeve 112 is provided with a first threaded hole 1121, which can penetrate the side wall of the connecting sleeve 112 in a direction perpendicular to the axial direction of the connecting sleeve 112; at the same time, the first open end 21 is provided with a second threaded hole, which can be inserted into the side wall of the first open end 21 in a direction perpendicular to the axial direction of the sliding sleeve 2; the diameter of the second threaded hole is equal to the diameter of the first threaded hole 1121.

[0072] Please continue reading Figure 1 As shown, the brake command sensor disclosed herein may also include a set screw 13. The set screw 13 can pass through both the second threaded hole and the first threaded hole 1121 and be threadedly connected to both the second threaded hole and the first threaded hole 1121. The set screw 13 can be used to fix the sliding sleeve 2 and the connecting sleeve 112 for a secondary purpose, so as to prevent the connecting sleeve 112 from loosening between the sliding sleeve 2 due to vibration or other external forces during aircraft flight, thereby improving the structural reliability of the brake command sensor.

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

[0074] In one exemplary embodiment of this disclosure, please continue to refer to Figure 6 As shown, a limiting plate 26 is provided inside the sliding sleeve 2. The limiting plate 26 can extend radially along the sliding sleeve 2, that is, the limiting plate 26 can extend in a direction perpendicular to the axial direction of the sliding sleeve 2. One end of the first electromagnetic induction component 23 can be connected to the limiting plate 26, and the other end can extend into the core 5. For example, the limiting plate 26 is provided with a plurality of sleeve step holes 261 penetrating the limiting plate 26 along the thickness direction of the limiting plate 26. The plurality of sleeve step holes 261 can be spaced apart and uniformly distributed in a ring. It should be noted that the number of sleeve step holes 261 matches the number of first electromagnetic induction components 23. For example, the number of sleeve step holes 261 is the same as the number of first electromagnetic induction components 23. For example, the number of sleeve step holes 261 and the number of first electromagnetic induction components 23 can both be 3.

[0075] In one exemplary embodiment of this 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 sequentially along the axial direction of the sliding sleeve 2, wherein the end of the iron core connecting rod 231 away from the iron core 232 is connected to the limiting plate 26. Figure 7 As shown, the core connecting rod 231 may include a first end and a second end connected to each other. The outer periphery of the first end is provided with a frustum 234, and the portion of the first end located away from the second end of the frustum 234 is provided with a first side through hole 235. 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 can pass through the sleeve stepped hole 261 from the side of the sliding sleeve 2 away from the front end cover assembly 1, and the frustum 234 can abut against the step of the sleeve stepped hole 261. At this time, the first side through hole 235 is located outside the sleeve stepped hole 261, that is, the first side through hole 235 is located between the limiting plate 26 and the cover 111. The second end of the core connecting rod 231 is located on the side of the limiting plate 26 away from the cover 111. A flat washer 19 and a first slotted nut 27 can be fitted around the outer periphery of the area between the limiting plate 26 and the cover 111 at the first end. This allows the second cotter pin 28 to pass through the first side through hole 235 and the first slotted nut 27 simultaneously and unfold. The iron core connecting rod 231 can be fixedly connected to the limiting plate 26 by the second cotter pin 28 and the first slotted nut 27. At the same time, the setting of the second cotter pin 28 can also achieve thread anti-loosening, further improving the structural reliability.

[0076] The core 232 can be made of a soft magnetic material to facilitate excitation and demagnetization. Please continue reading. Figure 1As shown, the iron core 232 can be a hollow structure. One end of the iron core 232 is fitted onto the end of the iron core connecting rod 231 away from the limiting plate 26. For example, the iron core 232 can be threadedly connected to the end of the iron core connecting rod 231 away from the limiting plate 26. The guide plug 233 can be made of plastic. 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. 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 can be threadedly connected to the end of the iron core 232 away from the iron core connecting rod 231. In an exemplary embodiment of this disclosure, before installing the iron core 232, threadlocker can 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 cylindrical, for example, it may be a cylinder. The housing 3 may include a through third open end 31 and a fourth open end 32. The third open end 31 may be fitted around the outer periphery of the second open end 22 of the sliding sleeve 2 and overlap with the second open end 22. The fourth open end 32 is located on the side of the third open end 31 away from the first open end 21. The material of the housing 3 may be aluminum alloy, so that the housing 3 can maintain sufficient strength while reducing the overall weight.

[0078] Please continue reading Figure 1 As shown, the return spring 4 can be sleeved on the outer periphery of the sliding sleeve 2, and both 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 cause the sliding sleeve 2 to move relative to the housing 3 along the axial direction of the housing 3. During 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 since the materials of the sliding sleeve 2 and the housing 3 are different (the material of the sliding sleeve 2 is stainless steel, and the material of the housing 3 is aluminum alloy), the combination of materials with different degrees of softness and hardness can avoid phenomena such as adhesion and jamming during the movement of the sliding sleeve 2 relative to the housing 3, which can further improve the reliability of the brake command sensor. This disclosure uses an external large spring instead of the traditional internal small spring, which has a higher fatigue life, reduces the risk of sensor failure due to the spring, and is easier to observe; moreover, the sensor structure of this disclosure is simple and easy to disassemble and assemble.

[0079] In one exemplary embodiment of this 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 circumferentially along the second open end 22. The surface of the first arc-shaped splines 24 can be arc-shaped and can be finely machined to make its surface smooth. 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 first arc-shaped splines 24 can be 2 to 5, such as 2, 3, 4 or 5. Of course, the number of first arc-shaped splines 24 can also be other than that, and no special limitation is made here.

[0080] In some embodiments of this disclosure, the first arc-shaped spline 24 and the sliding sleeve 2 can be an integral structure, and the sliding sleeve 2 and multiple first arc-shaped splines 24 can be formed simultaneously through an integral molding process.

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

[0082] For example, the arc-shaped keyway 33 can be strip-shaped and extend axially along the housing 3. The inner surface of the arc-shaped keyway 33 can be a smooth curved surface. The number of arc-shaped keyways 33 can be 2 to 5, for example, 2, 3, 4, or 5. Of course, the number of arc-shaped keyways 33 can also be other numbers, and no special limitation is made here. The number of arc-shaped keyways 33 is the same as the number of first arc-shaped splines 24. For example, the number of arc-shaped keyways 33 and the number of first arc-shaped splines 24 can both be 2; or, the number of arc-shaped keyways 33 and the number of first arc-shaped splines 24 can both be 3; or, the number of arc-shaped keyways 33 and the number of first arc-shaped splines 24 can both be 4; or, the number of arc-shaped keyways 33 and the number of first arc-shaped splines 24 can both be 5. When compressing or releasing the return spring 4, each first arc-shaped spline 24 can move along the length direction of each arc-shaped keyway 33 in a corresponding manner.

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

[0084] In one exemplary embodiment of this disclosure, please continue to refer to Figure 8 As shown, the fourth open end 32 of the housing 3 is provided with a rear limiting platform 35 inside. The rear limiting platform 35 is provided with a housing rear thread on the side away from the third open end 31, and multiple housing fuse holes 36 are also provided on the end face of the fourth open end 32.

[0085] Please continue reading Figure 1 As shown, the core assembly is at least partially fitted within the second open end 22, with the remaining portion fitted within the housing 3. That is, one end of the core assembly is fitted within the second open end 22, and the other end extends into the housing 3. The core assembly may include multiple cores 5; for example, the number of cores 5 may be 2 to 5, such as 2, 3, 4, or 5. It should be noted that the number of cores 5 may match the number of first electromagnetic induction components 23. For example, the number of cores 5 may be the same as the number of first electromagnetic induction components 23. The core 5 may be a hollow structure; for example, the core 5 may be cylindrical, with a second electromagnetic induction component provided on the inner wall of the core 5. Different first electromagnetic induction components 23 may be fitted one-to-one within different cores 5; when the first electromagnetic induction component 23 moves axially along the sliding sleeve 2, the first electromagnetic induction component 23 and its corresponding second electromagnetic induction component undergo electromagnetic induction to generate a braking signal. Furthermore, during the aforementioned 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, a gap exists between the iron core 232 and the inner wall of the core 5 during the axial movement of the first electromagnetic induction component 23 along the core 5. This prevents unnecessary friction between the iron core 232 and the inner wall of the core 5, thus avoiding damage to the iron core 232 and extending the service life of the brake command sensor. Simultaneously, because the guide plug 233 is made of plastic, the friction between it and the inner wall of the core 5 is minimal, allowing the guide plug 233 to slide smoothly along the inner wall of the core 5 without jamming.

[0086] In this disclosure, the design of multiple first electromagnetic induction components 23 and corresponding multiple second electromagnetic induction components within the core 5 enables multi-channel signal acquisition, effectively improving the reliability of the sensor. Even if one channel fails, the other channels can still operate normally, ensuring the continuity and accuracy of the braking signal and solving the problem of low reliability in single-channel designs. Simultaneously, the cooperation between the sliding sleeve 2 and the core components enables non-contact signal acquisition.

[0087] In some embodiments of this disclosure, the core 5 contains three coils, each of which can be led out by two wires. One coil is a primary coil centrally located along the length of the core 5, and the other two are secondary coils symmetrically located at both ends along the length of the core 5. The spatial arrangement of the coils and the core 232 is as follows: Figure 9 As shown; when the sensor is working, the primary coil is energized to excite the iron core 232. When the energized iron core 232 moves left and right in the internal space of the core body 5, the two secondary coils will generate induced voltages. The magnitude of the voltage is related to the position of the iron core 232. When the iron core 232 is on the left, the voltage of secondary coil 1 is large and the voltage of secondary coil 2 is small. When the iron core 232 is on the right, the voltage of secondary coil 1 is small and the voltage of secondary coil 2 is large. The position of the iron core 232 in the core body 5 can be calculated by the voltage difference between the two secondary coils, thereby determining the angle at which the pilot depresses the pedal to obtain the braking signal.

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

[0089] like Figure 10 As shown, the front pressure plate 51 can be disc-shaped. The front pressure plate 51 is sleeved inside the sliding sleeve 2, and there is a large gap between the inner circular surface of the sliding sleeve 2 and the outer circular surface of the front pressure plate 51, so as to ensure that the sliding sleeve 2 can reciprocate within the housing 3.

[0090] In one exemplary embodiment of this disclosure, the front pressure plate 51 may include a first stepped hole and a plurality of second stepped holes. Please continue to refer to... Figure 10As shown, the first stepped hole includes an anti-rotation groove 511 and a front center hole 512 that are aligned along the thickness direction of the front pressure plate 51. The anti-rotation groove 511 is located on the side of the front center hole 512 away from the housing 3, and the front center hole 512 is located in the central region of the front pressure plate 51. The second stepped hole includes a front limiting groove 513 and a front pressure plate through hole 514 that are aligned along the thickness direction of the front pressure plate 51. The front limiting groove 513 is located on the side of the front center hole 512 closer to the housing 3, and one end of the core 5 is connected to the front pressure plate 51 through the front limiting groove 513; the iron core connecting rod 231 can pass through the front pressure plate through hole 514 and then be inserted into the core 5. There can be multiple second stepped holes; for example, the number of second stepped holes can be the same as the number of cores 5, and each core 5 can be connected to the front pressure plate 51 through its corresponding front limiting groove 513. For example, the core 5 can be interference-fitted with the front limiting groove 513.

[0091] like Figure 11 As shown, the pressure plate connecting rod 52 may include a rod body 521 and a triangular anti-rotation step 522 located 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 a second side through hole 523 is opened on the side of the rear end thread. 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 locked 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 Figure 12 As shown, the rear pressure plate 53 can also be disc-shaped. The rear pressure plate 53 is located inside the housing 3. The rear pressure plate 53 includes a rear center hole 531 and a rear limiting groove 532. The rear limiting groove 532 can be defined by three second arc-shaped splines 534 provided on the surface of the rear pressure plate 53 near the front pressure plate 51. The rear center hole 531 is located in the central area of ​​the bottom surface of the rear limiting groove 532. The rear pressure plate 53 can be installed on the side of the housing 3 away from the sliding sleeve 2, so that the end of the core 5 away from the front limiting groove 513 is connected to the rear pressure plate 53 through the rear limiting groove 532. That is, the end of the core 5 away from the front limiting groove 513 can be inserted into the rear limiting groove 532. At this time, the end of the rod 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 521 away from the triangular anti-rotation step 522 can pass through the rear center hole 531).

[0093] In one exemplary embodiment of this disclosure, after the pressure plate connecting rod 52 passes through the rear central hole 531, a second slotted nut 54 can be fitted onto its end. The second slotted nut 54 can be threadedly connected to the end of the rod body 521. In some embodiments of this disclosure, a third cotter pin 55 can 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 unfold, thereby achieving thread anti-loosening through the third cotter pin 55 and the second slotted nut 54.

[0094] Please refer to some embodiments of this disclosure. Figure 12 As shown, the rear pressure plate 53 is also provided with multiple cable lead-out slots 533. The cable lead-out slots 533 can be U-shaped slots, which can be recessed inward from the edge of the rear pressure plate 53. The wires in each core 5 can be led out through the cable lead-out slots 533.

[0095] The rear cover assembly 6 can be connected to the fourth open end 32. For example... Figure 13 As shown, the rear 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. The clamping ring 61 may be cylindrical with external threads. The clamping ring 61 may be fitted into the fourth open end 32 of the housing 3 and connected to the fourth open end 32 via threads. The cover plate 62 is provided with a cable outlet 621, a vent hole 622, and a ground wire screw hole 623. Figure 14 As shown, a protective coil 64 can be installed inside the outlet 621, and the wire passing through the cable lead-out groove 533 can be led out from the outlet 621 except for the brake command sensor.

[0096] Please refer to some embodiments of this disclosure. Figure 13 and Figure 14 As shown, the rear cover assembly 6 may further include a connecting lug 63, which can be connected to the aircraft fuselage. The connecting lug 63 can be fixed on the side of the cover plate 62 away from the sliding sleeve 2 and is perpendicular to the cover plate 62. Two end cover fuse holes 631 are provided at the end of the connecting lug 63 near the cover plate 62. A fuse can be provided between the end cover fuse holes 631 and the housing fuse holes 36 to prevent structural loosening. A spherical bearing mounting hole 632 is provided at the end of the connecting lug 63 away from the cover plate 62. The spherical bearing 65 is inserted into the spherical bearing mounting hole 632 by interference fit. The connecting lug 63 can be connected to the aircraft fuselage through the spherical bearing 65. Under the action of the spherical bearing 65, the command sensor can still be installed and work normally even when the installation position error is large.

[0097] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A brake command sensor, characterized in that, include: A front cover assembly includes a front cover and a fisheye connector connected to the front cover, the fisheye connector being connected to a brake assembly; the front cover includes a cover body and a connecting sleeve connected to the side of the cover body away from the fisheye connector. A sliding sleeve includes a first open end and a second open end that pass through the sleeve; the first open end is connected to the outer periphery of the connecting sleeve; the second open end is located on the side of the first open end away from the fisheye connector; the sliding sleeve is provided with a plurality of first electromagnetic induction components; The housing includes a through third open end and a fourth open end, wherein the third open end is sleeved on the outer periphery of the second open end; the fourth open end is located on the side of the third open end away from the first open end; A return spring is sleeved on the outer periphery of the sliding sleeve, and the two ends of the return spring are in contact with the cover and the third open end, respectively; compressing or releasing the return spring can cause the first electromagnetic induction component inside the sliding sleeve to move along the axial direction of the sliding sleeve; The core assembly is at least partially fitted inside the second open end, with the remaining portion fitted inside the housing; the core assembly includes multiple cores, each core being a hollow tubular structure, and a second electromagnetic induction component is provided on the inner wall of the core; different first electromagnetic induction components are fitted one-to-one inside different cores; when the first electromagnetic induction component moves along the axial direction of the sliding sleeve, the first electromagnetic induction component and its corresponding second electromagnetic induction component undergo electromagnetic induction, which can convert the displacement into an electrical signal to generate a braking command; The rear cover assembly is connected to the fourth open end.

2. The brake command sensor according to claim 1, characterized in that, The outer circumferential surface of the connecting sleeve is provided with an external thread, and the inner circumferential surface of the first open end is provided with an internal thread. The connecting sleeve and the sliding sleeve are connected 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 in a direction perpendicular to the axial direction of the connecting sleeve; the first open end is provided with a second threaded hole, which is provided in the side wall of the first open end in a direction perpendicular to the axial direction of the sliding sleeve; the diameter of the second threaded hole is equal to the diameter of the first threaded hole. The brake command sensor also 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 is provided with a connection hole; the brake command sensor also includes: A push rod, one end of which is connected to the cover through the connecting hole, and the other end of which extends toward the cover 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; the sidewall of the blind hole is provided with a first through hole and a second through hole that are opposite to each other and have the same diameter. An idle stroke spring is provided inside the blind hole; The fisheye connector includes a front end connecting part and a piston rod that are connected to each other. The piston rod extends into the blind hole and contacts the free travel spring. The front end connecting part is connected to the brake assembly. The piston rod is provided with a waist-shaped hole. In the length direction of the piston rod, the length of the waist-shaped hole is greater than the diameter of the first through-pin hole, and the width of the waist-shaped hole is equal to the diameter of the first through-pin hole. The pin passes through the first through-hole, the waist-shaped hole, and the second through-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 that are circumferentially spaced along the second open end, and the inner wall of the housing is provided with a plurality of arc-shaped keyways that are circumferentially spaced along the housing and extend along the axial direction of the housing; when the reset spring is compressed or released, each of the first arc-shaped splines can move along different arc-shaped keyways respectively.

5. The brake command sensor according to claim 4, characterized in that, The third open end of the housing is provided with a limiting boss that extends radially inward. When the reset spring is reset, the limiting boss abuts against the end face of the first arc spline near the front cover assembly.

6. The brake command sensor according to claim 1, characterized in that, The sliding sleeve is provided with a limiting plate that extends radially along the sliding sleeve. The first electromagnetic induction component extends axially along the sliding sleeve, with one end of the first electromagnetic induction component connected to the limiting plate and the other end extending 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 connected sequentially along the axial direction of the sliding sleeve. The end of the iron core connecting rod away from the iron core is connected to the limiting 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 limiting plate. 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 iron core is made of a soft magnetic alloy, and the guide plug is made of plastic.

9. The brake command sensor according to claim 7, characterized in that, The core assembly also includes: A front pressure plate is fitted inside the sliding sleeve. The front pressure plate includes a first stepped hole and multiple second stepped holes. The first stepped hole includes an anti-rotation groove and a front center hole that are aligned along the thickness direction of the front pressure plate. The second stepped holes include a front limiting groove and a front pressure plate through hole that are aligned along the thickness direction of the front pressure plate. One end of the core is connected to the front pressure plate through the front limiting groove. The iron core connecting rod passes through the through hole of the front pressure plate and is inserted into the core. The pressure plate connecting rod includes a rod body and a triangular anti-rotation step provided at one end of the rod body. The rod body passes through the front center hole, and the triangular anti-rotation step is engaged in the anti-rotation groove. The rear pressure plate is located inside the housing. The rear pressure plate includes a rear center hole and a rear limiting groove. The rear center hole is located on the bottom surface of the rear limiting 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 limiting groove is connected to the rear pressure plate through the rear limiting groove.

10. The brake command sensor according to claim 7, characterized in that, The rear cover assembly includes a connecting lug that is connected to the aircraft fuselage.

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