Sensor mounting device suitable for inner wall of shaft barrel

Abstract

The invention provides a sensor mounting device suitable for the inner wall of a shaft barrel. The sensor mounting device comprises a mounting auxiliary device; the first sensor fixing seat and the second sensor fixing seat are both connected with the installation auxiliary device, the first sensor fixing seat and the second sensor fixing seat are arranged in a spaced mode, and the two ends of the sensor are connected with the first sensor fixing seat and the second sensor fixing seat correspondingly; the installation auxiliary device can drive the first sensor fixing base and the second sensor fixing base to drive the sensor to stretch out and draw back in the radial direction. The device has the advantages of being accurate in positioning, stable in structure and convenient to mount and dismount, effectively solves the problem that the strain sensor is inconvenient to mount in the axle cylinder with the variable axle diameter, and achieves the accurate positioning and centering functions by means of the structural characteristics of the device.

Description

Technical Field

[0001] The invention relates to the technical field of aviation weight measurement, and in particular to a sensor mounting device suitable for the inner wall of a shaft cylinder. Background Art

[0002] The weight and balance system of an aircraft measures the weight supported by each landing gear axle of the aircraft and combines it with an algorithm to achieve real-time measurement of the weight and center of gravity of the aircraft. To obtain the supported weight on each landing gear, a feasible method is to install strain sensors at the location with the largest strain change in the landing gear structure, use the strain change of the parts as data input, and calculate the pressure on each landing gear support.

[0003] For a single front landing gear or main landing gear, the position with the largest strain change when bearing the weight of the aircraft is generally on the axle, so this is also the best installation position for strain sensors. However, the outer surface space of the current aircraft landing gear axle is limited, and there are generally interferences between the tires, brakes and other mechanisms and the sensor installation position; the inner side of the axle barrel is more suitable for installing sensors, but the traditional installation method still has several problems.

[0004] Traditional sensor installation usually uses laser welding. However, the internal space of the axle is small, which is not convenient for positioning and operation of direct welding operations. Secondly, due to strength requirements, the landing gear of some aircraft will design the axle into a structure with a shaft diameter that changes along the axis. This shaft tube with small ends and a large middle makes direct welding more difficult to implement. In addition, the interior of the landing gear shaft tube is generally rough-surfaced, which increases the difficulty of welding to a certain extent. Summary of the invention

[0005] In view of this, the present invention provides a sensor installation device suitable for the inner wall of a shaft cylinder, so as to achieve the purpose of installing and fixing the strain sensor inside the shaft cylinder with a changing shaft diameter.

[0006] The present invention provides the following technical solutions: a sensor installation device suitable for the inner wall of a shaft cylinder, comprising: an installation auxiliary device; a first sensor fixing seat and a second sensor fixing seat, both of which are connected to the installation auxiliary device, and the first sensor fixing seat and the second sensor fixing seat are arranged at an interval, and the two ends of the sensor are respectively connected to the first sensor fixing seat and the second sensor fixing seat, and the installation auxiliary device can drive the first sensor fixing seat and the second sensor fixing seat to drive the sensor to extend and retract in the radial direction.

[0007] Furthermore, the first sensor fixing seat includes: a fixed box body and a fixed seat box body cover, forming a box body structure with an accommodating space; a driving bevel gear, which is arranged in the box body structure and can be driven and connected to the installation auxiliary device; at least two driven bevel gear screw shafts, which are arranged in the box body structure and connected to the driving bevel gear; a first sensor connecting end block, each driven bevel gear screw shaft is correspondingly provided with a first sensor connecting end block, the first sensor connecting end block can move relative to the driven bevel gear screw shaft along the axial direction of the driven bevel gear screw shaft, and each first sensor connecting end block is provided with a connecting hole connected to one end of the sensor.

[0008] Furthermore, the second sensor fixing seat includes: a fixed box body and a fixed seat box body cover, forming a box body structure with an accommodating space; a driving bevel gear, which is arranged in the box body structure and can be driven and connected to the installation auxiliary device; at least two driven bevel gear screw shafts, which are arranged in the box body structure and connected to the driving bevel gear; a second sensor connecting end block, each driven bevel gear screw shaft is correspondingly provided with a second sensor connecting end block, the second sensor connecting end block can move relative to the driven bevel gear screw shaft along the axial direction of the driven bevel gear screw shaft, and each second sensor connecting end block is provided with a connecting hole connected to the other end of the sensor.

[0009] Furthermore, the second sensor fixing seat has the same structure as the first sensor fixing seat.

[0010] Furthermore, the installation auxiliary device includes: an outer cylinder; a positioning clamp, one end of which is connected to the outer cylinder, and the other end of the positioning clamp is connected to the first sensor fixing seat and the second sensor fixing seat.

[0011] Furthermore, the installation auxiliary device also includes: an installation auxiliary shaft cylinder, which is connected to the outer cylinder and can slide relative to the outer cylinder along the axial direction of the outer cylinder; an installation auxiliary rotating shaft, which is arranged in the installation auxiliary shaft cylinder and can rotate relative to the installation auxiliary shaft cylinder, and the installation auxiliary rotating shaft can be connected to the driving bevel gear.

[0012] Furthermore, one end of the auxiliary rotating shaft is installed with a rocker arm structure, and the other end of the auxiliary rotating shaft is installed with a cross-shaped cam structure, and the cross-shaped cam structure can be adapted to the driving bevel gear.

[0013] Furthermore, an outer cylinder fastener for fixing the outer cylinder to the axle is provided on the outer cylinder.

[0014] Furthermore, a shaft cylinder fastener for axially positioning the auxiliary shaft cylinder and the outer cylinder is provided on the outer cylinder.

[0015] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted by the present invention include at least the following: the present invention has the characteristics of precise positioning, stable structure, and convenient installation and disassembly, effectively solving the problem of inconvenient installation of strain sensors in wheel axle tubes with varying shaft diameters, and utilizing its own structural characteristics to achieve precise positioning and centering functions.

[0016] The device has a compact structure and good radial load-bearing capacity. It can be installed inside a wheel axle with a rough inner wall by using an interference fit installation method, and has little impact on the wheel axle. The multiple mechanisms of the device can flexibly match different installation positions and sizes, and the installation and disassembly are simple and easy to operate. It has a simple structure, low manufacturing cost, is easy to promote and apply, and has great practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the sensor fixing seat;

[0020] Figure 3 It is a schematic diagram of the installation auxiliary device;

[0021] Figure 4 is a schematic diagram of an axial section of the overall device;

[0022] Figure 5 is a cross-sectional view of the sensor mounting base.

[0023] The reference numerals in the figure are: 1. driving bevel gear; 2. fixed seat housing cover; 3. first sensor connecting end block; 4. fixed housing; 5. driven bevel gear screw shaft; 6. installation auxiliary rotating shaft; 7. installation auxiliary shaft cylinder; 8. outer cylinder; 8a. outer cylinder fastener; 8b. shaft cylinder fastener; 9. positioning clamp; 10. sensor. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] like Figures 1 to 5As shown, an embodiment of the present invention provides a sensor installation device suitable for the inner wall of a shaft cylinder, comprising an installation auxiliary device, a first sensor fixing seat and a second sensor fixing seat. The first sensor fixing seat and the second sensor fixing seat are both connected to the installation auxiliary device, and the first sensor fixing seat and the second sensor fixing seat are arranged at an interval, and the two ends of the sensor 10 are respectively connected to the first sensor fixing seat and the second sensor fixing seat, and the installation auxiliary device can drive the first sensor fixing seat and the second sensor fixing seat to drive the sensor 10 to extend and retract in the radial direction.

[0027] The device has the characteristics of accurate positioning, stable structure, and convenient installation and disassembly. It effectively solves the problem of inconvenient installation of strain sensors in wheel axle tubes with changing shaft diameters, and uses its own structural characteristics to achieve accurate positioning and centering functions. The device has a compact structure and good radial load-bearing capacity; at the same time, it adopts an interference installation method, so it can be installed inside a wheel axle with a rough inner wall, and has little impact on the wheel axle. The multiple mechanisms of the device can flexibly cooperate with different installation positions and sizes, and the installation and disassembly are simple and easy to operate. It has a simple structure, low manufacturing cost, is easy to promote and apply, and has great practical value.

[0028] The first sensor fixing seat comprises: a fixing housing 4, a fixing housing cover 2, a driving bevel gear 1, at least two driven bevel gear screw shafts 5 and a first sensor connection end block 3. The fixing housing 4 and the fixing housing cover 2 form a housing structure with a containing space; the driving bevel gear 1 is arranged in the housing structure and can be connected to the auxiliary installation device by driving; at least two driven bevel gear screw shafts 5 are arranged in the housing structure and connected to the driving bevel gear 1; each driven bevel gear screw shaft 5 is provided with a first sensor connection end block 3, the first sensor connection end block 3 can move relative to the driven bevel gear screw shaft 5 along the axial direction of the driven bevel gear screw shaft 5, and each first sensor connection end block 3 is provided with a connection hole connected to one end of the sensor 10.

[0029] The function of the first sensor holder is to provide a stable installation platform for the sensor 10 and ensure that the sensor 10 can be accurately symmetrically distributed along the axis of the shaft tube. Through the cooperation of the driven bevel gear screw shaft 5 and the first sensor connection end block 3, the telescopic and variable diameter function of the sensor can be realized to adapt to the inner wall of the wheel shaft with different shaft diameters. This design enables the sensor holder to flexibly adapt to different installation positions and depths, while ensuring that the radial and axial positions of the sensor are fixed, ensuring the stability and accuracy of the sensor inside the wheel shaft of the aircraft landing gear.

[0030] The sensor's telescopic and variable diameter function is realized through the bevel gear set and the lead screw mechanism, so that the sensor 10 can adapt to the inner wall of the axle with different shaft diameters, ensuring the precise positioning and fixation of the sensor 10. This design not only improves the flexibility and adaptability of the sensor installation, but also enhances its structural strength, and can withstand the force deformation and vibration of the aircraft landing gear axle, thereby providing a convenient and reliable strain sensor installation solution for the aircraft weight and balance measurement system.

[0031] In one embodiment, the second sensor fixing seat has a different structure from the first sensor fixing seat. The second sensor fixing seat includes a fixed housing 4, a fixed housing cover 2, a driving bevel gear 1, at least two driven bevel gear screw shafts 5 and a second sensor connection end block. The fixed housing 4 and the fixed housing cover 2 form a housing structure with a containing space; the driving bevel gear 1 is arranged in the housing structure and can be connected to the auxiliary installation device; at least two driven bevel gear screw shafts 5 are arranged in the housing structure and connected to the driving bevel gear 1; each driven bevel gear screw shaft 5 is provided with a corresponding second sensor connection end block, the second sensor connection end block can move relative to the driven bevel gear screw shaft 5 along the axial direction of the driven bevel gear screw shaft 5, and each second sensor connection end block is provided with a connection hole connected to the other end of the sensor 10.

[0032] In this embodiment, the second sensor connection terminal block has a different structure from the first sensor connection terminal block 3. Figure 4 As shown, under the same stroke, the second sensor connection end block and the first sensor connection end block 3 can extend to different lengths relative to the corresponding box structure, thereby driving the sensor 10 to adapt to the installation of the tapered shaft surface working condition.

[0033] In another embodiment, the second sensor holder has the same structure as the first sensor holder, and the structure of the second sensor holder will not be described in detail here.

[0034] The installation auxiliary device comprises an outer cylinder 8 and a positioning clamp 9. One end of the positioning clamp 9 is connected to the outer cylinder 8, and the other end of the positioning clamp 9 is connected to the first sensor fixing seat and / or the second sensor fixing seat.

[0035] The outer cylinder 8, as the main structure of the device, provides the necessary support and positioning functions, while the positioning clamp 9 is responsible for connecting the sensor holder to the outer cylinder 8 or other sensor holders to ensure the stability and accuracy of the sensor during installation and use. The coordinated use of the outer cylinder 8 and the positioning clamp 9 can effectively reduce the interference of the sensor 10 in the complex mechanical operation and improve the stability and reliability of the measurement results.

[0036] The installation auxiliary device also includes an installation auxiliary shaft cylinder 7 and an installation auxiliary rotating shaft 6. The installation auxiliary shaft cylinder 7 is connected to the outer cylinder 8 and can slide relative to the outer cylinder 8 along the axial direction of the outer cylinder 8; the installation auxiliary rotating shaft 6 is arranged in the installation auxiliary shaft cylinder 7 and can rotate relative to the installation auxiliary shaft cylinder 7, and the installation auxiliary rotating shaft 6 can be drivingly connected to the driving bevel gear 1.

[0037] The installation auxiliary shaft cylinder 7 is connected to the outer cylinder 8 and can slide along the axial direction of the outer cylinder 8. This design enables the device to adapt to the installation requirements of different positions, improving the flexibility and adaptability of sensor installation. At the same time, the installation auxiliary shaft 6 is arranged in the installation auxiliary shaft cylinder 7 and can rotate relative to the installation auxiliary shaft cylinder 7. Such a structural design helps to improve the stability and accuracy of the sensor installation process. At the same time, the labor intensity of the staff is effectively reduced through the automated and mechanized auxiliary installation device.

[0038] One end of the auxiliary shaft 6 is a rocker arm structure, and the other end of the auxiliary shaft 6 is a cross-shaped cam structure, and the cross-shaped cam structure can be adapted to the driving bevel gear 1. The auxiliary shaft 6 achieves precise adaptation and power transmission with the driving bevel gear 1 through the ingenious design of its rocker arm structure and cross-shaped cam structure, ensuring the ease of operation, structural stability and precise control during the sensor installation process, thereby improving installation efficiency, reducing labor intensity, and ensuring the accuracy and reliability of sensor installation.

[0039] The outer cylinder 8 is provided with an outer cylinder fastener 8a for fixing the outer cylinder 8 on the axle. The outer cylinder 8 is provided with a shaft cylinder fastener 8b for axially positioning the auxiliary shaft cylinder 7 and the outer cylinder 8.

[0040] The outer cylinder 8 is equipped with an outer cylinder fastener 8a and a shaft cylinder fastener 8b, which are respectively used to firmly fix the outer cylinder 8 to the wheel axle and accurately axially position and install the auxiliary shaft cylinder 7. The design of these fasteners not only enhances the structural stability and operational accuracy of the sensor installation device, but also simplifies the installation and maintenance process, and improves the reliability and work efficiency of the entire system.

[0041] The specific operation method of the embodiment of the present invention is as follows:

[0042] During installation, first pre-assemble the various parts together, then install the sensor fixing seat in the shaft tube by interference fit, and finally disassemble and remove the installation auxiliary device to complete the installation.

[0043] First, according to the installation position of the sensor in the shaft, select the corresponding length sensor connection end block (hereinafter, the sensor connection end block will not be distinguished as the first sensor connection end block or the second sensor connection end block, collectively referred to as the sensor connection end block), install a group of four sensor connection end blocks into the corresponding four driven bevel gear screw shafts 5, each sensor connection end block is threadedly connected with its corresponding driven bevel gear screw shaft 5, and the sensor connection end block is limited between the fixed seat box 4 and the fixed seat box cover 2, so the rotation provided by the driven bevel gear screw shaft 5 can be converted into the translation of the sensor connection end block, thereby realizing the function of telescopic diameter change. After installing each fixed seat, install the two ends of a group of four sensors 10 at the corresponding holes of the sensor connection end block to complete the installation of the entire sensor fixed seat.

[0044] The entire sensor fixing seat is pre-installed on the installation auxiliary device. First, adjust the relative position of the installation auxiliary shaft cylinder 7 and the outer cylinder 8 according to the installation position. The installation auxiliary shaft cylinder 7 is installed in the center of the outer cylinder 8 and can be moved along the axis; when it is moved to the desired position, the shaft cylinder fastener 8b is used to fix the position. A group of four positioning clamps 9 are installed on the slide rail of the outer cylinder to clamp the sensor fixing seat so that its axis remains at the axis center of the entire device. The profile of the end of the installation auxiliary shaft cylinder 7 close to the inside of the shaft is consistent with the profile of the fixed seat box cover, further ensuring accurate positioning. An installation auxiliary rotating shaft 6 is installed inside the installation auxiliary shaft cylinder 7, and the installation auxiliary rotating shaft 6 can rotate in the installation auxiliary shaft cylinder 7. There is a cross-shaped cam on the side close to the inside of the wheel axle for inserting the drive bevel gear 1 to drive the drive bevel gear 1 to rotate; there is a handle or rocker arm structure on the side close to the outside of the wheel axle to facilitate input rotation.

[0045] Rotate the installation auxiliary shaft 6 to shrink the sensor connection end block of the sensor fixing seat to the minimum position. At this time, the minimum radial dimension of the front end of the entire device is smaller than the narrowest part of the wheel axle, and the device can be inserted into the wheel axle. When the device is installed in the landing gear wheel axle, the profile of the outer cylinder 8 cooperates with one end face of the wheel axle for positioning, and the outer cylinder 8 is temporarily fixed on the wheel axle by the outer cylinder fastener 8a. Rotate the installation auxiliary shaft 6 again to make the sensor connection end block drive the sensor 10 to extend to the target position. At this time, the sensor connection end block presses against the inner wall of the wheel axle, and its radial cross-sectional dimension is slightly larger than the inner diameter of the shaft at the installation location; due to the self-locking of the thread, the sensor connection end block cannot move horizontally by itself, so the entire device is installed in the wheel axle. When disassembling, loosen the shaft cylinder fastener 8b and pull out the installation auxiliary shaft cylinder 7 and the installation auxiliary shaft 6; then loosen the positioning clamp 9 and the outer cylinder fastener 8a to take out the entire installation auxiliary device.

[0046] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with each other, and with each other.

Claims

1. A sensor mounting device suitable for the inner wall of a shaft cylinder, characterized in that: include: Installation of auxiliary devices; The first sensor fixing seat and the second sensor fixing seat are both connected to the installation auxiliary device, and the first sensor fixing seat and the second sensor fixing seat are arranged at an interval, and the two ends of the sensor (10) are respectively connected to the first sensor fixing seat and the second sensor fixing seat, and the installation auxiliary device can drive the first sensor fixing seat and the second sensor fixing seat to drive the sensor (10) to extend and retract in the radial direction.

2. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 1 is characterized in that: The first sensor fixing seat comprises: A fixed box body (4) and a fixed seat box body cover (2) are formed to form a box body structure with a containing space; A driving bevel gear (1) is arranged in the box structure and can be drivingly connected to the mounting auxiliary device; At least two driven bevel gear screw shafts (5), arranged in the box structure and connected to the driving bevel gear (1); A first sensor connection end block (3), each driven bevel gear screw shaft (5) is provided with a corresponding first sensor connection end block (3), the first sensor connection end block (3) can move relative to the driven bevel gear screw shaft (5) along the axial direction of the driven bevel gear screw shaft (5), and each first sensor connection end block (3) is provided with a connection hole connected to one end of a sensor (10).

3. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 2 is characterized in that: The second sensor fixing seat comprises: A fixed box body (4) and a fixed seat box body cover (2) are formed to form a box body structure with a containing space; A driving bevel gear (1) is arranged in the box structure and can be drivingly connected to the mounting auxiliary device; At least two driven bevel gear screw shafts (5), arranged in the box structure and connected to the driving bevel gear (1); A second sensor connection end block is provided at each driven bevel gear screw shaft (5), the second sensor connection end block can move relative to the driven bevel gear screw shaft (5) along the axial direction of the driven bevel gear screw shaft (5), and each second sensor connection end block is provided with a connection hole connected to the other end of the sensor (10).

4. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 2, characterized in that: The second sensor fixing seat has the same structure as the first sensor fixing seat.

5. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 3 or 4, characterized in that: The installation auxiliary device comprises: outer cylinder(8); A positioning clamp (9) has one end connected to the outer cylinder (8), and the other end of the positioning clamp (9) is connected to the first sensor fixing seat and the second sensor fixing seat.

6. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 5, characterized in that: The installation auxiliary device also includes: An auxiliary shaft cylinder (7) is installed, connected to the outer cylinder (8), and is capable of sliding relative to the outer cylinder (8) along the axial direction of the outer cylinder (8); The installation auxiliary rotating shaft (6) is arranged in the installation auxiliary shaft cylinder (7) and can rotate relative to the installation auxiliary shaft cylinder (7). The installation auxiliary rotating shaft (6) can be drivingly connected to the driving bevel gear (1).

7. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 6, characterized in that: One end of the auxiliary rotating shaft (6) is provided with a rocker arm structure, and the other end of the auxiliary rotating shaft (6) is provided with a cross-shaped cam structure, and the cross-shaped cam structure can be matched with the driving bevel gear (1).

8. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 6, characterized in that: The outer cylinder (8) is provided with an outer cylinder fastener (8a) for fixing the outer cylinder (8) on the wheel axle.

9. The sensor installation device suitable for the inner wall of the shaft cylinder according to claim 6, characterized in that: The outer cylinder (8) is provided with a shaft cylinder fastener (8b) for axially positioning the auxiliary shaft cylinder (7) and the outer cylinder (8).

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