Pedal displacement measuring device of foot control system

Abstract

The utility model belongs to the aviation technology equipment design field, and relates to a foot control system pedal displacement measuring device comprising a manual screwing fixing mechanism, a motion conversion structure, a high precision external display digital display scale, a seat slide rail fixing mechanism, and a powerful sucker; by utilizing the convenience that a seat slide rail of a certain type of machine is parallel to the horizontal displacement of a pedal of a foot control system, a high-precision digital display scale of an external display is mounted on a cockpit floor through a seat slide rail fixing mechanism and a powerful sucker, and then a manual screwing fixing mechanism and a motion conversion structure are used; and the horizontal displacement of the pedal of the foot control system is converted to a displacement sensor of a digital display scale of a high-precision external display, so that the horizontal displacement of the pedal of the foot control system is measured. The pedal displacement measuring device overcomes the defects that a measuring device is inconvenient to install and fix and unstable in measurement when the pedal displacement measuring device is used for measuring the pedal displacement of a foot control system.

Description

Technical Field

[0001] The utility model belongs to the field of aircraft function test and detection of aviation process equipment design, and relates to a pedal displacement measuring device for a foot control system. Background Art

[0002] In the manual flight control system of a certain type of Chinese transport aircraft, the foot control system primarily operates the aircraft's rudder, working in conjunction with the joystick to manipulate the ailerons, thereby achieving coordinated turns in mid-air. To ensure accurate flight control, the fore-aft displacement of the foot control system's pedals must be measured during the commissioning process after installation to verify the transmission relationship between the pedal displacement and the rudder surfaces. Pedal directional displacement measurement requires an error of no more than 1mm. However, the foot control system of this type of aircraft incorporates a spring load. As the pedals move from neutral to their limit positions, the force applied by the pedals gradually increases, reaching nearly 900N near the limit. Furthermore, the force applied by the pedals is unstable, resulting in significant fluctuations in pedal displacement, making it difficult to read the measured data. Furthermore, because the pedals' circular motion must be converted to horizontal, the displacement measurement direction of the measuring device must be strictly parallel to the direction of the pedals' horizontal motion.

[0003] Chinese patent publication number CN104374355A, published on February 25, 2015, is titled "Device and Method for Measuring the Displacement of a Driver Control System." The application discloses a method in which a connecting rod is dragged at the T-point of the steering column, which then drives a ball spline to convert the arc motion of the steering column into horizontal motion. The displacement of the steering column is ultimately measured by a displacement sensor. The pedal displacement is measured in the same manner as the steering column. The patent's shortcomings are: 1. The structure of the displacement measurement device for the foot control system is not described; 2. The device is complex to assemble, making installation difficult and resulting in unstable measurement data; 3. To ensure that the displacement of the measuring device and the device under test remains strictly parallel, the structural requirements for the measuring device are too high. Utility Model Content

[0004] Technical problem solved by the utility model: The purpose of the utility model is to solve the problems of inconvenient installation and fixing of the measuring device and unstable measurement in the existing pedal displacement measurement of the foot control system of a certain type of machine, and to provide a pedal displacement measuring device of the foot control system with simple installation and operation and efficient measurement.

[0005] The technical solution of this utility model:

[0006] A foot control system pedal displacement measuring device includes a manually tightening fixing mechanism 1, a motion conversion structure 3, a strong suction cup 4, a high-precision external display digital display scale 5, and a seat slide rail fixing mechanism 7. The motion conversion structure 3 is connected to the tubular axis 9 of the foot control mechanism pedal 2 through the manually tightening fixing mechanism 1. The motion conversion structure 3 is connected to the dynamic grid module displacement sensor 18 of the high-precision external display digital display scale 5. The dynamic grid module displacement sensor 18 is slidably arranged on the high-precision external display digital display scale 5. One end of the high-precision external display digital display scale 5 is connected to the strong suction cup 4, and the other end is connected to the seat slide rail 6 through the seat slide rail fixing mechanism 7.

[0007] Furthermore, the strong suction cup 4 is mounted on the cockpit floor 8 of the aircraft.

[0008] Furthermore, the manual tightening and fixing mechanism 1 includes an expansion sleeve 10, a conical screw 11, and a tightening knob 13. One end of the conical screw 11 is a conical end, and one end of the expansion sleeve 10 has several cuts. The cut end of the expansion sleeve 10 is sleeved on the conical end of the conical screw 11 and is arranged in the tubular axis 9 of the foot operating mechanism pedal 2. The tightening knob 13 is sleeved on the conical screw 11 and is threadedly matched with the conical screw 11. The other end of the conical screw 11 is a cylindrical end, which is connected to the motion conversion structure 3. By tightening the tightening knob 13, the conical end of the conical screw 11 continuously contracts to open the cut end of the expansion sleeve 10, thereby fixing the manual tightening and fixing mechanism 1 in the pedal tubular axis 9 and ensuring that the conical screw 11 is coaxial with the pedal tubular axis 9.

[0009] Furthermore, the motion conversion structure 3 includes a linear bearing 12, a self-aligning bearing 14, a bearing bracket 15, a linear optical axis 16, and an optical axis support 17; the self-aligning bearing 14 is sleeved on the cylindrical end of the conical screw 11 and can rotate around the cylindrical end of the conical screw 11, the linear bearing 12 is slidably sleeved on the linear optical axis 16, one end of the bearing bracket 15 is sleeved on the self-aligning bearing 14, and the other end is sleeved on the linear bearing 12; the linear optical axis 16 is installed on the optical axis support 17, and the optical axis support 17 is connected to the moving grid module displacement sensor 18.

[0010] Furthermore, the seat rail fixing mechanism 7 includes a rail fixing bracket 21, a cushion block 22, a marble 23, a pin rod 24, a handle 25, a spring retaining ring 26, a hexagonal end cover 27, a spring 28, and a T-shaped bushing 29; wherein the T-shaped bushing 29 is sleeved on the protruding shaft of the rail fixing bracket 21 and cooperates with the upper lock hole of the seat rail 6, the positioning block of the rail fixing bracket 21 fits with the inner surface of the U-shaped groove of the seat rail 6, the cushion block 22 is installed on the positioning block of the rail fixing bracket 21, the pin rod 24 is set in the rail fixing bracket 21, one end of the pin rod 24 is provided with a groove, and the marble 23 is installed. The described groove is inside and can slide in the groove. A round hole is provided on the protruding shaft of the slide rail fixing bracket 21. The round hole cooperates with the marble 23 to limit the slide rail fixing bracket 21. The other end of the pin rod 24 is a threaded end, which is threadedly connected to the handle 25. The spring retaining ring 26 is sleeved on the threaded end of the pin rod 24 and is close to the end face of the threaded hole of the handle 25. The described spring 28 is sleeved on the pin rod 24. One end of the spring 28 abuts against the inner cavity surface of the positioning block of the fixed bracket 21, and the other end abuts against the spring retaining ring 26. The hexagonal end cover 27 is screwed to the open end of the inner cavity of the positioning block of the fixed bracket 21 and is clearance-matched with the handle 25.

[0011] Furthermore, one end of the high-precision external display digital scale 5 is connected to the strong suction cup 4 through a bolt, and the other end is connected to the positioning block of the slide rail fixing bracket 21 through a bolt.

[0012] Furthermore, the dynamic gate module displacement sensor 18 is connected to the external display 20 .

[0013] Beneficial effects of the utility model:

[0014] Compared with the existing technology, the advantages of the present invention are: 1. The circular motion of the pedal of the foot control system of this type of machine is decomposed into vertical and horizontal motions through a motion conversion mechanism, and then the motion conversion mechanism is connected to a high-precision external display digital scale to measure the horizontal displacement of the pedal; 2. The seat slide rail structure parallel to the horizontal movement direction of the existing pedal on this type of machine is utilized to install a high-precision external display digital scale to ensure the technical requirements of accurate measurement; 3. The use of a manually tightening fixing mechanism and a seat slide rail fixing mechanism realizes the quick and convenient installation of the pedal displacement measuring device of the foot control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation of the pedal displacement measuring device of the foot control system;

[0016] Figure 2 This is an exploded view of the pedal displacement measuring device;

[0017] Figure 3 It is a schematic diagram of the manual tightening fixing mechanism;

[0018] Figure 4 It is a schematic diagram of the seat slide fixing mechanism.

[0019] Among them: 1. Manual tightening mechanism, 2. Foot control mechanism pedal, 3. Motion conversion structure, 4. Strong suction cup, 5. High-precision external display digital scale, 6. Seat slide rail, 7. Seat slide rail fixing mechanism, 8. Cockpit floor, 9. Foot pedal tube shaft, 10. Expansion bushing, 11. Tapered screw, 12. Linear bearing, 13. Tightening knob, 14. Self-aligning bearing, 15. Bearing bracket, 16. Linear optical axis, 17. Optical axis support, 18. Moving gate module displacement sensor, 19. Ruler, 20. External display, 21. Slide rail fixing bracket, 22. Spacer, 23. Marble, 24. Pin, 25. Handle, 26. Spring retaining ring, 27. Hexagonal end cover, 28. Spring 28 component, 29. T-type bushing. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figure 1 As shown, the foot control system pedal displacement measuring device primarily comprises a manually tightened fixing mechanism 1, a motion conversion structure 3, a strong suction cup 4, a high-precision external display digital scale 5, and a seat rail fixing mechanism 7. The motion conversion structure 3 is connected to the tubular shaft 9 of the foot control system pedal 2 of the aircraft by manually tightening the fixing mechanism 1. The motion conversion structure 3 is connected 18 to the dynamic grid module displacement sensor of the high-precision external display digital scale 5. Utilizing the seat rail 6 of the aircraft, which is parallel to the horizontal movement direction of the foot control system pedal, the seat rail fixing mechanism 7 is used to mount one end of the high-precision external display digital scale 5 to the seat rail 6 via the seat rail fixing mechanism 7. The other end is connected to the strong suction cup 4, which serves as a mounting support. The strong suction cup 4 is then adsorbed and mounted to the cockpit floor 8 of the aircraft.

[0022] like Figure 2 As shown, the motion conversion structure 3 consists of a linear bearing 12, a self-aligning bearing 14, a bearing bracket 15, a linear optical axis 16, and an optical axis support 17. The self-aligning bearing 14 is connected to the tapered screw 11 to compensate for the vertical error between the tapered screw 11 and the linear optical axis 16. The linear bearing 12 and the linear optical axis 16 compensate for the vertical displacement of the pedal's curved motion. The linear optical axis 16 is connected to the dynamic gate module displacement sensor via the optical axis support 17 to detect the horizontal displacement data during the pedal's curved motion.

[0023] like Figure 3As shown, the manual tightening and fixing mechanism 1 consists of an expansion sleeve 10, a tapered screw 11, and a tightening knob 13. The fixing principle of this manual tightening and fixing mechanism is the same as that of an expansion screw. By tightening the tightening knob 13, the tapered end of the tapered screw 11 continuously contracts, causing the open end of the expansion sleeve 10 to open, thereby fixing the manual tightening and fixing mechanism 1 in the pedal tube shaft 9 and ensuring that the tapered screw 11 is coaxial with the pedal tube shaft 9.

[0024] like Figure 4 As shown, the seat slide rail fixing mechanism 7 is composed of a slide rail fixing bracket 21, a pad 22, a marble 23, a pin rod 24, a handle 25, a spring retaining ring 26, a hexagonal end cover 27, a spring 28, and a T-shaped bushing 29. Among them, the T-shaped bushing 29 is installed between the protruding shaft of the slide rail fixing bracket 21 and the upper lock hole of the seat slide rail 6 to protect the lock hole; the protruding shaft of the slide rail fixing bracket 21 is inserted into the T-shaped bushing 29, and the slide rail fixing bracket 21 fits with the inner surface of the U-shaped groove of the seat slide rail 6 and is firmly fixed, ensuring that the axial direction of the protruding shaft of the fixing bracket 21 is perpendicular to the seat slide rail 6, thereby ensuring that the high-precision external display digital display scale 5 installed on the fixing bracket 21 is parallel to the seat slide rail 6; the pad 22 is used to adjust the horizontality of the slide rail fixing bracket 21 and the scale 19; the marble 23, pin rod 24, handle 25, spring retaining ring 26, hexagonal end cover 27, and spring 28 form a quick latch. By pressing the handle 25, the spring retaining ring 26 compresses the spring 28, and the marble 23 slides into the groove of the pin rod 24, releasing the limit of the marble 23 on the protruding shaft of the fixing bracket 21, so that the slide rail fixing bracket 21 can be installed quickly and conveniently.

[0025] Before first use, assemble the seat rail fixing mechanism and the motion conversion mechanism. The assembly method of the seat rail fixing mechanism is as follows: first, insert the threaded end of the pin rod 24 into the spring stopper 26, insert the hexagonal end cap 27 into the handle 25, connect the threaded end of the pin rod 24 and the threaded hole of the handle 25, and tighten them. Then, insert the spring 28 into the pipe axis of the rail fixing bracket 21, and put the marble 23 into the groove of the pin rod 24. Insert the connected pin rod 24 and handle 25 into the pipe axis of the rail fixing bracket 21, press and rotate the handle to allow the marble 25 to be released from the rail fixing bracket 21. The small shaft is exposed in the small round hole, and finally the hexagonal end cover is tightened; the assembly method of the motion conversion mechanism is as follows: first fix the optical axis support 17 and the mounting hole above the moving grid module displacement sensor 18 with screws, and then insert the end of the linear optical axis 16 with the hole into the optical axis support 17, align the bolt hole of the optical axis support 17, insert the bolt and tighten it, and insert the bearing bracket 15 with bearing into the linear optical axis 16 (the self-aligning bearing 14 and the linear bearing 12 are pressed on the bearing bracket 15 according to the requirements of HB0-37).

[0026] During assembly and installation, first connect one end of the high-precision external display digital scale 5 to the strong suction cup 4 with screws, and the other end to the seat slide fixing mechanism 7 with screws. To ensure that the scale 19 is installed in a horizontal state during the first use, you can add or remove spacers 22 in the middle when connecting the scale 19 to the seat slide fixing mechanism 7. Then insert the conical screw 11 into the expansion sleeve 10, and place the open end of the expansion sleeve 10 into the pedal tube shaft 90 so that the shoulder of the expansion sleeve 10 is flush with the end face of the pedal tube shaft 90. Screw the tightening knob 13 into the threaded shaft end of the conical screw 11, tighten the tightening knob 13 until the conical screw 11 is securely installed, and then insert the optical axis end of the conical screw 11 into the self-aligning bearing 14 of the bearing bracket 15. Finally, place the T-shaped bushing 29 into the appropriate lock hole of the seat slide rail 6, insert the assembled slide rail fixing mechanism 7 into the T-shaped bushing 29, ensure that the slide rail fixing bracket 21 fits in place with the inner surface of the U-shaped groove of the seat slide rail 6, press the handle 25 to lock the slide rail fixing mechanism 7, and then press the suction button of the strong suction cup 4 to make the suction cup sucked onto the cockpit floor 8. The assembly installation of the device is completed.

[0027] When inspecting and using, first slowly move the foot control system pedal 2 back and forth to check the flexibility of the measuring device. After checking that the installation is not shaking, and that there are no tightness, jamming, or other factors that affect the measurement, turn on the power switch on the external display 20, place the pedal in the initial measurement position, press the zero button on the external display 20, and operate the foot control system pedal 2. The pedal 2 drives the motion conversion mechanism 3 to move, and the motion conversion mechanism 3 drives the linear optical axis 16 connected to the dynamic grid module displacement sensor 18 to move, thereby driving the dynamic grid module displacement sensor 18 to slide on the high-precision external display digital display scale. Observe the digital display data on the external display 20, that is, the horizontal displacement measurement data of the pedal within the movement range. In addition, the external display 20 also has relative measurement and absolute measurement buttons, which can measure the horizontal displacement of the pedal in different movement states.

Claims

1. A pedal displacement measuring device for a foot control system, characterized in that: It includes a manual tightening and fixing mechanism, a motion conversion structure, a strong suction cup, a high-precision external display digital scale, and a seat slide rail fixing mechanism. The motion conversion structure is connected to the pipe axis of the foot pedal of the foot control mechanism through the manual tightening and fixing mechanism. The motion conversion structure is connected to the dynamic grid module displacement sensor of the high-precision external display digital scale. The dynamic grid module displacement sensor is slidably arranged on the high-precision external display digital scale. One end of the high-precision external display digital scale is connected to the strong suction cup, and the other end is connected to the seat slide rail through the seat slide rail fixing mechanism.

2. A pedal displacement measuring device for a foot control system according to claim 1, characterized in that: The strong suction cup is installed on the aircraft cockpit floor.

3. The pedal displacement measuring device of a foot control system according to claim 1, characterized in that: The manual tightening and fixing mechanism includes an expansion sleeve, a conical screw, and a tightening knob. One end of the conical screw is a conical end, and one end of the expansion sleeve has a plurality of cuts. The cut end of the expansion sleeve is sleeved on the conical end of the conical screw and is arranged in the tubular axis of the pedal of the foot operating mechanism. The tightening knob is sleeved on the conical screw and cooperates with the conical screw thread. The other end of the conical screw is a cylindrical end, which is connected to the motion conversion structure. By tightening the tightening knob, the conical end of the conical screw continuously contracts to open the cut end of the expansion sleeve, thereby fixing the manual tightening and fixing mechanism in the pedal tubular axis and ensuring that the conical screw is coaxial with the pedal tubular axis.

4. A pedal displacement measuring device for a foot control system according to claim 3, characterized in that: The motion conversion structure includes a linear bearing, a self-aligning bearing, a bearing bracket, a linear optical axis, and an optical axis support; the self-aligning bearing is sleeved on the cylindrical end of the tapered screw and can rotate around the cylindrical end of the tapered screw, the linear bearing is slidably sleeved on the linear optical axis, one end of the bearing bracket is sleeved on the self-aligning bearing, and the other end is sleeved on the linear bearing; the linear optical axis is installed on the optical axis support, and the optical axis support is connected to the moving grid module displacement sensor.

5. The pedal displacement measuring device of a foot control system according to claim 1, characterized in that: The seat rail fixing mechanism includes a rail fixing bracket, a cushion block, a marble, a pin rod, a handle, a spring retaining ring, a hexagonal end cover, a spring, and a T-shaped bushing; wherein the T-shaped bushing is sleeved on the protruding shaft of the rail fixing bracket and cooperates with the upper locking hole of the seat rail, the positioning block of the rail fixing bracket fits with the inner surface of the U-shaped groove of the seat rail, the cushion block is installed on the positioning block of the rail fixing bracket, the pin rod is set in the rail fixing bracket, one end of the pin rod is set with a groove, and the marble is installed in the groove And it can slide in the groove. A round hole is set on the protruding shaft of the slide rail fixing bracket, and the round hole cooperates with the marble to limit the slide rail fixing bracket. The other end of the pin rod is a threaded end, which is threadedly connected to the handle. The spring retaining ring is sleeved on the threaded end of the pin rod and is close to the end face of the threaded hole of the handle. The spring is sleeved on the pin rod, one end of the spring abuts against the inner cavity surface of the fixing bracket positioning block, and the other end abuts against the spring retaining ring. The hexagonal end cover is screwed to the open end of the inner cavity of the fixing bracket positioning block and cooperates with the handle clearance.

6. A pedal displacement measuring device for a foot control system according to claim 5, characterized in that: One end of the high-precision external display digital scale is connected to the strong suction cup through a bolt, and the other end is connected to the positioning block of the slide rail fixing bracket through a bolt.

7. The pedal displacement measuring device of a foot control system according to claim 1, characterized in that: The moving grid module displacement sensor is connected to an external display.

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