Driving device of speed sensor suitable for high and low temperature environment box

Abstract

A driving device of a speed sensor suitable for a high and low temperature environment box is characterized in that a load cylinder is sleeved on a main shaft, and the inner surface of a product mounting seat is in non-interference fit with the outer surface of a driving sleeve. And the outer end of the driving sleeve is fixedly connected with the rotating disc. Two shifting forks are evenly distributed on an end plate of the rotating disc, and the input end of the speed sensor is in contact connection with the shifting forks. The inner surface of a pressing cover in the load cylinder positioning mechanism is attached to the outer circumferential surface of the load cylinder. According to the invention, through extension of the main shaft and the load cylinder and fixation of the supporting seat and the pressing cover, long-distance rotation speed and torque output is realized; the speed sensor is placed in the environment box through the extension of the load cylinder and the main shaft and the test hole of the environment box, and the speed sensor is physically isolated from the direct current motor, so that the driving capability of the driving device is ensured, and the required rotating speed and torque are provided for the performance test and durability test of the speed sensor in high and low temperature environments.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft braking, and is a driving device for a speed sensor. Background Art

[0002] As an important accessory product of the aircraft braking system, the speed sensor in the aircraft braking system has more stringent performance test requirements for the speed sensor, and performance testing and durability testing under low and high temperature conditions have become one of the keys. In the original speed sensor drive device, the speed sensor is driven to rotate by a servo motor, which provides the speed sensor with the speed required for the test and the measurement and control system collects the test data, thereby completing the performance test and durability test of the speed sensor. Since the speed sensor is used in the aircraft field, it faces high and low temperature requirements, and the servo motor cannot meet the temperature requirements of the speed sensor test and cannot be driven at speed in the environmental chamber, so it cannot achieve speed drive under high and low temperature conditions.

[0003] When the aircraft takes off and lands, under the thrust of the aircraft, the wheel tires and the ground combine to drive the wheels to rotate, so that the aircraft slides on the ground. When the aircraft brakes, the dynamic and static discs of the wheel brakes rub against each other under the brake pressure of the brake system to produce friction resistance, reduce the wheel rolling speed, and reduce the aircraft sliding speed, thereby achieving the purpose of braking the aircraft. During the landing braking process of the aircraft, the brake system control unit receives the signal of the brake command sensor, inputs the brake command to the brake valve, and the brake valve outputs the brake pressure to brake the wheel rotation. The brake system control unit also receives the speed signal of the speed sensor to perform anti-skid calculation. According to the calculation result of the anti-skid brake, the corresponding current signal is output to the brake control valve to output the necessary brake pressure. When the wheel brake is locked, the speed sensor gives a wheel slip signal, and the brake system reduces the pressure and the brake torque, thereby realizing the anti-skid brake control of the brake system. Therefore, the performance, reliability, stability and durability of the wheel speed sensor play an irreplaceable role in the comprehensive performance and safety of the aircraft brake system.

[0004] After searching, a utility model patent with announcement number CN207611066U discloses a speed sensor detection device. Under normal temperature conditions, the speed sensor is driven to rotate by a servo motor to simulate the rotation working condition of the speed sensor and perform performance detection on the speed sensor. However, it is only suitable for detection under normal temperature conditions and is not suitable for performance detection of the speed sensor under high or low temperature conditions. Summary of the invention

[0005] In order to overcome the deficiency in the prior art that the speed sensor cannot be used for performance detection in high / low temperature environments, the present invention proposes a driving device for a speed sensor suitable for a high / low temperature environment box.

[0006] The present invention includes a DC motor, a motor mounting seat, an induction plate, a load cylinder, a load cylinder positioning mechanism, a product mounting seat, a drive sleeve, a rotating plate, a product mounting cover, a speed sensor, a shift fork, a stopper, a main shaft, a base plate, a proximity switch, a shaft sleeve and a sleeve. Among them:

[0007] The DC motor is fixed on the upper surface of the base plate through a motor mounting seat. The shaft of the DC motor is connected to one end of the main shaft through a coupling. The load cylinder is sleeved on the main shaft and placed on the upper surface of the support seat. An induction disc and a shaft sleeve are sequentially sleeved on one end of the main shaft close to the DC motor, and the induction disc and the shaft sleeve are both located outside the load cylinder. The product mounting seat is located at the other end of the load and is fixedly connected to the outer end surface of the load cylinder; the product mounting seat is sleeved on the outer circumference of the drive sleeve, and a gap is left between the inner surface of the product mounting seat and the outer surface of the drive sleeve so that there is no interference between the two. The drive sleeve is sleeved at the end of the main shaft, and the end surface of the drive sleeve is fixedly connected to the end surface of the main shaft through a stopper. The outer end of the drive sleeve is fixedly connected to the rotating disk through a flange. Two shift forks are evenly distributed on the end plate of the rotating disk, and the input end of the speed sensor is in contact with the shift forks. The speed sensor is placed on the product mounting seat and is fastened by the product mounting cover. The fixing plates at both ends of the pressing cover in the load cylinder positioning mechanism are fixed to the two side edges of the support seat respectively, and the inner surface of the pressing cover is fitted with the outer circumferential surface of the load cylinder;

[0008] The load cylinder, the DC motor and the main shaft are all coaxial with the induction disc.

[0009] The proximity switch is mounted on the bottom plate through a bracket, and a sensing distance of 0.1 to 2 mm is maintained between the sensing end of the proximity switch and the outer end surface of the sensing disk.

[0010] In order to install the load cylinder positioning mechanism, an axial pressing cover rotating pin hole is processed on one side of the support seat; and an axial connecting rod rotating pin hole is processed on the other side of the support seat.

[0011] The centers of the end plates at both ends of the load cylinder are respectively provided with mounting holes for deep groove ball bearings and bearing retaining rings. The end surface of one end of the load cylinder is provided with threaded holes for connecting the neutral plate of the product mounting seat.

[0012] The load cylinder positioning mechanism comprises a rotating knob, a connecting rod, a clamping cover, a sleeve and two rotating pins; the clamping cover is in the shape of a semicircular arc plate, and fixed plates are respectively provided at both ends of the semicircular arc plate of the clamping cover;

[0013] The lower end of the connecting rod is installed in the connecting rod rotating pin hole of the support seat through a rotating pin, and the upper end passes through the U-shaped groove on the clamping cover. A sleeve is mounted on the connecting rod and the sleeve is located on the upper surface of the clamping cover. A rotating knob is mounted on the upper end of the connecting rod and is located above the sleeve. By rotating the rotating knob, the clamping cover and the support seat clamp and fix the load cylinder.

[0014] A rotating pin is mounted on the ear piece of the connecting rod and is inserted into the connecting rod rotating pin hole on the supporting seat; the connecting rod can rotate around the rotating pin as the center;

[0015] Install another rotating pin on the ear piece of the clamping cover and insert it into the rotating pin hole of the clamping cover on the support seat so that the clamping cover can rotate around the rotating pin.

[0016] The closed end surface of the rotating disk is provided with two threaded holes for installing the shift forks, and the threaded holes are symmetrically distributed on both sides of the center of the rotating disk, and the center distance between the two shift forks is consistent with the center distance between the two U-shaped holes of the driving head of the speed sensor.

[0017] The inner diameter of the rotating disk is larger than the outer diameter of the stopper, and when the rotating disk is mounted on the stopper, a clearance fit is formed between the two.

[0018] The product mounting seat is a single-body structure, which is divided into a connecting plate, a transition plate and a product seat according to function. The connecting plate is located at one end of the product mounting seat, is annular, and has a mounting hole for the drive sleeve in the center; the aperture of the mounting hole for the drive sleeve is larger than the outer diameter of the drive sleeve. The other end of the product mounting seat is the product seat; the upper surface of the product seat is a semicircular groove adapted to the product shape, and mounting holes for the product mounting cover are distributed on both sides of the semicircular groove.

[0019] The connecting plate and the product seat are connected by a transition plate; the transition plate is semicircular, and its radius is greater than the maximum outer diameter of the driving sleeve. The semicircular shape is adopted to reduce the structural weight; the axial length of the transition plate must meet the assembly requirements of the fork and the product.

[0020] The outer circumferential surface at one end of the induction disc is evenly distributed with 7 radial induction rods, and the length of the induction rods must be such that the ends of the induction rods can contact the proximity switch after assembly.

[0021] The present invention realizes the output of rotational speed and torque over a long distance by extending the main shaft and the load tube and fixing the support seat and the clamping cover; by extending the load tube and the main shaft, the speed sensor can be placed in the environmental box through the test hole of the environmental box, and the speed sensor can be physically isolated from the DC motor to ensure the driving ability of the driving device, thereby providing the required rotational speed and torque for the performance test and durability test of the speed sensor in high and low temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1a It is a schematic diagram of the structure of the drive device.

[0023] Figure 1b yes Figure 1a Top view of the .

[0024] Figure 1c yes Figure 1a -A view in the.

[0025] Figure 2 It is the induction disc parts diagram; among them, Figure 2 a is the main view, Figure 2 b is Figure 2 Left view of a.

[0026] Figure 3 This is the spindle parts drawing.

[0027] Figure 4 is the load tube parts diagram; among them, Figure 4 a is the main view, Figure 4 b is Figure 4 The left view of a, Figure 4 c is Figure 4 Right view of a.

[0028] Figure 5 It is the support seat parts drawing; among them, Figure 5 a is the main view, Figure 5 c is Figure 5 A top view of Figure 5 b is Figure 5 Right view of a.

[0029] Figure 6 It is a drawing of the parts of the clamping cover; among them, Figure 6 a is the main view, Figure 6 c is Figure 6 A top view of Figure 6 b is Figure 6 Right view of a.

[0030] Figure 7 It is the parts drawing of the product mounting base; among them, Figure 7 a is the main view, Figure 7 c is Figure 7 A top view of Figure 7 b is Figure 7 Right view of a.

[0031] Figure 8 This is the product installation cover parts drawing; among them, Figure 8 a is the main view, Figure 8 c is Figure 8 Top view of a.

[0032] Fig. 9It is the driving sleeve parts drawing; among them, 9a is the main view, Fig. 9 b is Fig. 9 Right view of a.

[0033] Fig.10 is a rotating disk parts diagram; wherein 10a is a front view, Fig.10 b is Fig.10 Right view of a.

[0034] In the figure: 1. DC motor, 2. motor mounting seat, 3. induction disk, 4. load cylinder, 5. rotating knob, 6. connecting rod, 7. clamping cover, 8. rotating pin, 9. supporting seat, 10. product mounting seat, 11. driving sleeve, 12. rotating disk, 13. product mounting cover, 14. speed sensor, 15. shift fork, 16. block, 17. main shaft, 18. bottom plate, 19. proximity switch, 20. bushing; 21. sleeve; 23. clamping cover rotating pin hole; 24. connecting rod rotating pin hole; 25. clamping cover mounting groove; 26. connecting rod mounting groove. DETAILED DESCRIPTION

[0035] This embodiment is a driving device for a speed sensor suitable for a high and low temperature environment box, comprising a DC motor 1, a motor mounting seat 2, an induction disc 3, a load tube 4, a load tube positioning mechanism, a product mounting seat 10, a drive sleeve 11, a rotating disc 12, a product mounting cover 13, a speed sensor 14, a shift fork 15, a stopper 16, a main shaft 17, a bottom plate 18, a proximity switch 19, a sleeve 20 and a sleeve 21. Wherein: the DC motor 1 is fixed to the upper surface of the bottom plate through the motor mounting seat 2. The shaft of the DC motor is connected to one end of the main shaft through a coupling. The load tube 4 is sleeved on the main shaft and placed on the upper surface of the support seat 9. The induction disc 3 and the sleeve 20 are sequentially sleeved on the end of the main shaft close to the DC motor, and the induction disc and the sleeve are both located outside the load tube 4. The product mounting seat 10 is located at the other end of the load and is fixedly connected to the outer end face of the load tube; the product mounting seat is sleeved on the outer circumference of the drive sleeve 11, and a gap is left between the inner surface of the product mounting seat and the outer surface of the drive sleeve so that there is no interference between the two. The drive sleeve is sleeved on the end of the main shaft, and the end face of the drive sleeve is fixedly connected to the end face of the main shaft through a stopper 16. The outer end of the drive sleeve is fixedly connected to the rotating disk 12 through a flange. Two shift forks 15 are evenly distributed on the end plate of the rotating disk, and the input end of the speed sensor 14 is in contact with the shift fork. The speed sensor is placed on the product mounting seat and fastened by the product mounting cover 13.

[0036] The proximity switch 19 is mounted on the bottom plate through a bracket, and a sensing distance of 0.1 to 2 mm is maintained between the sensing end of the proximity switch and the outer end surface of the sensing disk.

[0037] The load cylinder positioning mechanism is located on the outer side of the load cylinder 4, and includes a rotating knob 5, a connecting rod 6, a clamping cover 7, a sleeve 21 and two rotating pins 8. The fixing plates at both ends of the semicircular plate-shaped clamping cover in the load cylinder positioning mechanism are respectively fixed to the two side edges of the support seat 9, and the inner surface of the clamping cover is fitted with the outer circumferential surface of the load cylinder 4.

[0038] In order to install the load cylinder positioning mechanism, axial pin holes are processed on the two side edges of the support seat respectively; one of the pin holes is a clamping cover rotation pin hole 23; a rotation pin is mounted on the ear piece of the clamping cover and inserted into the clamping cover rotation pin hole, so that the clamping cover can rotate around the rotation pin 8; the other is a connecting rod rotation pin hole 24, another rotation pin is mounted on the ear piece of the connecting rod and inserted into the connecting rod rotation pin hole, so that the connecting rod 6 can rotate around the rotation pin 8. The lower end of the connecting rod is mounted in the connecting rod rotation pin hole of the support seat 9 through a rotation pin, and the upper end passes through the U-shaped groove on the clamping cover 7. A sleeve 21 is mounted on the connecting rod, and the sleeve is located on the upper surface of the clamping cover. The rotating knob 5 is mounted on the upper end of the connecting rod and is located above the sleeve. By rotating the rotating knob 5, the clamping cover 7 and the support seat 9 press and fix the load cylinder 4.

[0039] During assembly, the load cylinder 4 is sleeved on the main shaft 17 and located on the support seat, so that the circumferential surface of the load cylinder 4 contacts the semicircular concave surface of the support seat 9 and is fastened by the clamping cover 7. The load cylinder 4, the DC motor 1, the main shaft 17 and the induction disc 3 are all coaxial.

[0040] The centers of the end plates at both ends of the load cylinder 4 are respectively provided with mounting holes for deep groove ball bearings and bearing retaining rings. The end surface of one end of the load cylinder 4 is provided with threaded holes for connecting to the neutral plate of the product mounting seat.

[0041] The closed end surface of the rotating disk 12 is provided with two threaded holes for mounting the shift forks 15, and the threaded holes are symmetrically distributed on both sides of the center of the rotating disk, and the center distance between the two shift forks is consistent with the center distance between the two U-shaped holes of the drive head of the speed sensor 14. The outer circumferential surface of the open end of the rotating disk is provided with a flange connected to the drive sleeve 11. The inner diameter of the rotating disk is larger than the outer diameter of the stopper 16, and when the rotating disk is mounted on the stopper, the two are clearance-matched.

[0042] The product mounting seat 10 is a single-body structure, which is divided into a connecting plate, a transition plate and a product seat according to its function. The connecting plate is located at one end of the product mounting seat, is annular, and has a mounting hole for the drive sleeve 11 in the center; the aperture of the mounting hole of the drive sleeve 11 is larger than the outer diameter of the drive sleeve. The other end of the product mounting seat 10 is the product seat; the upper surface of the product seat is a semi-circular groove adapted to the product shape, and the mounting holes of the product mounting cover 13 are distributed on both sides of the semi-circular groove. During assembly, the speed sensor as a product is placed in the semi-circular groove of the product seat, and the product mounting cover is installed on the upper surface of the product seat and tightened to complete the installation and positioning of the product. The connecting plate and the product seat are connected by a transition plate; the transition plate is semi-circular, and its radius is larger than the maximum outer diameter of the drive sleeve 11, and the semi-circular shape adopted can effectively reduce the weight of the structure; the axial length of the transition plate must meet the assembly requirements of the fork and the product.

[0043] The induction disc 3 is sleeve-shaped; the outer circumferential surface of one end of the induction disc is evenly distributed with 7 radial induction rods, and the length of each induction rod must be such that the end of each induction rod can contact the proximity switch 19 after assembly.

[0044] The main shaft 17 has keyways at both ends, and a threaded hole at the center of one end surface; it is fixedly connected to the load cylinder 4 through a deep groove ball bearing; one end is fixedly connected to the induction disk 3 through a flat key, and the other end is fixedly connected to the center hole and the drive sleeve 11 through a flat key.

Claims

1. A driving device for a speed sensor suitable for a high and low temperature environment box, characterized in that: The invention comprises a DC motor (1), a motor mounting seat (2), an induction disc (3), a load cylinder (4), a load cylinder positioning mechanism, a product mounting seat (10), a support seat (9), a drive sleeve (11), a rotating disc (12), a product mounting cover (13), a speed sensor (14), a shift fork (15), a stopper (16), a main shaft (17), a base plate (18), a proximity switch (19), a shaft sleeve 20 and a sleeve (21); wherein: The DC motor (1) is fixed to the upper surface of the base plate via a motor mounting seat (2); the shaft of the DC motor is connected to one end of the main shaft via a coupling; the load cylinder (4) is sleeved on the main shaft and placed on the upper surface of the support seat (9); an induction disk (3) and a shaft sleeve 20 are sequentially sleeved on the end of the main shaft close to the DC motor, and the induction disk and the shaft sleeve are both located outside the load cylinder (4); the product mounting seat (10) is located at the other end of the load and is fixedly connected to the outer end surface of the load cylinder; the product mounting seat is sleeved on the outer circumference of a drive sleeve (11), and a gap is left between the inner surface of the product mounting seat and the outer surface of the drive sleeve, so that the two There is no interference fit; the driving sleeve is sleeved on the end of the main shaft, and the end face of the driving sleeve is fixedly connected to the end face of the main shaft through a stopper (16); the outer end of the driving sleeve is fixedly connected to the rotating disk (12) through a flange; two shift forks (15) are evenly distributed on the end plate of the rotating disk, and the input end of the speed sensor (14) is in contact with and connected to the shift forks; the speed sensor is placed on the product mounting seat and fastened by the product mounting cover (13); the fixing plates at both ends of the clamping cover (7) in the load cylinder positioning mechanism are respectively fixed to the two side edges of the support seat (9), and the inner surface of the clamping cover is made to fit the outer circumferential surface of the load cylinder (4); The load cylinder (4), the DC motor (1), and the main shaft (17) are all coaxial with the induction disk (3).

2. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: The proximity switch (19) is mounted on the bottom plate (18) via a bracket, and a sensing distance of 0.1 to 2 mm is maintained between the sensing end of the proximity switch and the outer end surface of the sensing disk.

3. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: In order to install the load cylinder positioning mechanism, an axial pressing cover rotating pin hole (23) is processed on one side of the support seat; and an axial connecting rod rotating pin hole (24) is processed on the other side of the support seat.

4. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: The centers of the end plates at both ends of the load cylinder (4) are respectively provided with mounting holes for deep groove ball bearings and bearing retaining rings; and threaded holes for connecting to the neutral plate of the product mounting seat are distributed on the end surface of one end of the load cylinder (4).

5. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: The load cylinder positioning mechanism comprises a rotating knob (5), a connecting rod (6), a clamping cover (7), a sleeve (21) and two rotating pins (8); the clamping cover is in the shape of a semicircular arc plate, and fixed plates are respectively provided at both ends of the semicircular arc plate of the clamping cover; The lower end of the connecting rod is installed in the connecting rod rotating pin hole of the support seat (9) through a rotating pin, and the upper end passes through the U-shaped groove on the clamping cover; a sleeve (21) is mounted on the connecting rod and is located on the upper surface of the clamping cover; a rotating knob (5) is mounted on the upper end of the connecting rod and is located above the sleeve, and by rotating the rotating knob (5), the clamping cover and the support seat clamp and fix the load cylinder (4); A rotating pin (8) is mounted on the ear piece of the connecting rod (6) and is inserted into the rotating pin hole of the connecting rod on the supporting seat; The connecting rod can rotate around the rotating pin; Another rotating pin is mounted on the ear piece of the pressing cover and is inserted into the rotating pin hole of the pressing cover on the supporting seat, so that the pressing cover can rotate around the rotating pin as the center.

6. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: The closed end surface of the rotating disk (12) is provided with two threaded holes for mounting a shift fork (15), and the threaded holes are symmetrically distributed on both sides of the center of the rotating disk, and the center distance between the two shift forks is consistent with the center distance between the two U-shaped holes of the drive head of the speed sensor (14).

7. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: The inner diameter of the rotating disk is larger than the outer diameter of the stopper (16), and when the rotating disk is mounted on the stopper, a clearance fit is formed between the two.

8. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: The product mounting seat (10) is a single-body structure, and is divided into a connecting plate, a transition plate and a product seat according to function; the connecting plate is located at one end of the product mounting seat, is annular, and has a mounting hole for a drive sleeve (11) at the center; the diameter of the mounting hole of the drive sleeve (11) is larger than the outer diameter of the drive sleeve; the other end of the product mounting seat is the product seat; the upper surface of the product seat is a semi-circular groove adapted to the product shape, and mounting holes for a product mounting cover (13) are distributed on both sides of the semi-circular groove.

9. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 8, characterized in that: The connecting plate and the product seat are connected via a transition plate; the transition plate is semicircular in shape, and its radius is greater than the maximum outer diameter of the driving sleeve (11). The semicircular shape is adopted to reduce the structural weight; the axial length of the transition plate must meet the assembly requirements of the shift fork and the product.

10. The driving device of the speed sensor suitable for the high and low temperature environment box as claimed in claim 1, characterized in that: The outer circumferential surface at one end of the induction disc is evenly distributed with 7 radial induction rods, the length of which must be such that the ends of the induction rods can contact the proximity switch (19) after assembly.

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