Contact type detection device for engine mandrel

Abstract

The invention discloses an engine mandrel contact type detection device, which relates to the technical field of bearing detection and comprises a module support, a PPU support, a PPU, a pneumatic clamping jaw assembly, a servo motor, a positioning seat, a pneumatic measuring assembly, a gauge mounting plate, a third support and a fixing plate. The pneumatic clamping jaw assembly is fixed to the PPU support through a connecting plate and used for clamping and moving a bearing. The servo motor is fixed to the module support, and an output shaft of the servo motor is connected with the PPU. The positioning seat is slidably connected to the slide rail through the electric steel slide block, the slide rail is fixed on the module support, and the positioning seat is used for placing a bearing to be detected; the testing fixture mounting plate is fixed on the module bracket and is used for fixing and supporting other parts; the pneumatic measuring assembly is fixed on the gauge mounting plate, and a contact with transverse movement moves on the surface of the bearing to perform constant-pressure contact type size detection on the mandrel; the technical effects that the detection content is diversified, the detection result accuracy is improved, operation is convenient and fast, and the detection efficiency is improved can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of bearing detection, and in particular to a contact detection device for an engine spindle. Background Art

[0002] A bearing is a mechanical element used to support rotation or linear motion, reduce friction and guide mechanical devices to move in a specific direction. It is usually composed of rollers, needle rollers, spindles and bodies, and is widely used in various mechanical equipment and industrial fields. However, the size detection of the spindle in the bearing is very important, which is directly related to the assembly accuracy and service life of the bearing. Even a small size deviation may cause the bearing to run unstably or even cause failure.

[0003] Regarding the detection of the needle mandrel, the Chinese invention patent with patent number CN115824642B discloses an automatic detection device for bearings, which includes a detection platform, a sliding hole is provided on the detection platform, a rotating plate is rotatably installed in the detection platform, and a limited slider is fixedly installed; it also includes a telescopic member, which is fixed on the detection platform; and a lifting assembly, which is composed of a lifting plate, a detection assembly, a shooting unit and a connecting shaft; in addition, there is a driving assembly, which includes a slide, a driving motor and a driving roller; and a transmission assembly, which is composed of a transmission rod and a telescopic rod; the invention drives the lifting plate to move downward through the telescopic member, so that the detection assembly automatically docks with the inner ring of the bearing, and after docking, the transmission assembly drives the driving assembly to translate as a whole, so that the driving roller abuts against the surface of the outer ring of the bearing. This process can be completed with only one movement of the telescopic member, realizing the synchronous debugging of the detection assembly and the driving assembly, and providing convenience for the flexibility detection of the bearing.

[0004] Although the above scheme realizes the automatic detection of bearings when detecting the shaft core, in actual use, it only performs a single performance test on the flexibility of the bearing, and does not involve the size of the core shaft. As a result, the test results are biased and cannot provide sufficient detection accuracy and stability, thereby reducing the detection precision. At the same time, there is the problem of cumbersome manual operation, which reduces the detection efficiency. Summary of the invention

[0005] The present application solves the technical problems in the prior art of single detection content, inaccurate detection results, cumbersome manual operation and reduced detection efficiency by providing an engine spindle contact detection device, and achieves the technical effects of diversified detection content, improved accuracy of detection results, convenient operation and improved detection efficiency.

[0006] The present application provides an engine spindle contact detection device, comprising a module bracket, a PPU bracket, a PPU, a pneumatic clamping jaw assembly, a servo motor, a positioning seat, a pneumatic measuring assembly, a gauge mounting plate, a third bracket and a fixing plate; the module bracket is a steel frame, used to provide a basic support structure for the entire device; the PPU bracket is placed opposite to the module bracket and is fixed to the module bracket by bolts for installing the PPU; the PPU is fixed to the PPU bracket, used to provide an air source and power support for the entire detection device; the pneumatic clamping jaw assembly is fixed to the PPU bracket through a connecting plate, used to clamp and move the bearing; the servo motor is fixed to the module bracket and its output shaft is connected to the PPU; the positioning seat is slidably connected to the slide rail through an electric steel slider, the slide rail is fixed to the module bracket, and the positioning seat is used to place the bearing to be detected; the gauge mounting plate is fixed to the module bracket for fixing and supporting other components; the pneumatic measuring assembly is fixed to the gauge mounting plate, and a contact with a lateral movement moves on the bearing surface to perform constant pressure contact size detection on the spindle.

[0007] Furthermore, the pneumatic measurement assembly includes a servo electric steel, an L-shaped plate, a cylinder 1, a displacement sensor, a contact, a pneumatic measuring ring gauge and a cylinder 2; the servo electric steel is fixed on the gauge mounting plate, and is used to drive the contact to move for contact measurement; the L-shaped plate is placed vertically and fixed on the servo electric steel; the cylinder 1 is placed vertically and fixed on the horizontal section of the L-shaped plate; the displacement sensor is fixed on the servo electric steel, and is used to measure the displacement of the contact; the contact is fixed to the bottom of the displacement sensor and directly contacts the bearing roller for measurement; the ring gauge is detachably fixed to the gauge mounting plate and is located below the piston rod of the cylinder 1, and is used to provide a measurement reference for the bearing roller; the cylinder 2 is fixed on the gauge mounting plate and a paddle is fixed on its piston end, and is used to drive the paddle to move and press the roller.

[0008] Furthermore, a rotation detection component is fixed to a telescopic end of the cylinder, and the rotation detection component is used to detect the size of the core shaft when the roller is rotating.

[0009] Furthermore, the rotation detection assembly includes a support rod, a drive motor, a drive wheel, a fixing column and a fixing capsule; The support rod is an L-shaped structure and is fixed on the inspection fixture mounting plate; the drive motor is fixed on the inspection fixture mounting plate and is located below the support rod, and is used to drive the drive wheel to rotate; the drive wheel is rotatably connected to the support rod and fixedly connected to the output shaft of the drive motor, and is used to drive the bearing roller to rotate to achieve dynamic detection; the fixed column is fixed to one telescopic end of the cylinder; the fixed bag is fixed on the outside of the fixed column, and is used to fix the vertically placed core shaft and detect the axis size.

[0010] Furthermore, a plurality of groups of support bags are fixed inside the fixing bag and between the fixing columns. Each group of support bags is arranged up and down and each group of support bags includes four circumferentially arranged support bags. The support bags are placed horizontally to increase the support and stability of the fixing bag.

[0011] Furthermore, the interior of the fixing bag and the support bag are connected to the air pump through external pipes. The external air pipes of the fixing bag and the support bag are different, and pressure sensor 1 and pressure sensor 2 are respectively provided on their external pipes. Pressure sensor 1 and pressure sensor 2 are used to detect the internal air pressure of the fixing bag and the support bag respectively.

[0012] Further, the support bag is a cylindrical structure having two parts, including an air column and a placement cavity; The air column is located in the middle of the support bag, and the outside is filled with paraffin to enhance the stability of the fixation bag; the placement cavity is an annular structure and is located outside the air column. Paraffin is arranged inside the placement cavity to enhance the stability of the fixation bag.

[0013] Furthermore, a thermocouple detector is fixed to one end of each support bag close to the core shaft, and the thermocouple detector is used to detect the temperature of the core shaft when the roller has different rotation speeds.

[0014] Furthermore, a group of position capsules is fixed to the outer side of one end of each support capsule close to the core shaft, and each group of position capsules includes two position capsules arranged up and down, and the position capsules are spherical capsule structures.

[0015] Furthermore, a plurality of adjustment capsules are fixed on the outside of the fixed capsule. The adjustment capsules are annular structures and correspond one-to-one with each group of support capsules, and are used to cooperate with the position capsules to achieve fine adjustment of the position of the thermocouple detection point.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages: By effectively combining the pneumatic system and the motor drive, high-precision contact-type dimension detection of the core shaft of the bearing is achieved. By applying constant pressure, stable contact between the detection contact and the surface of the bearing to be measured is ensured, thereby reducing the measurement error caused by unstable contact and improving the stability of the measurement. The technical problems of single detection content, inaccurate detection results, cumbersome manual operation and reduced detection efficiency in the prior art are effectively solved, and the technical effects of diversified detection content, improved accuracy of detection results, convenient operation and improved detection efficiency are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall three-dimensional structure of an engine spindle contact detection device of the present invention.

[0018] Figure 2The figure is a schematic side perspective three-dimensional structure diagram of an engine spindle contact detection device according to the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of a core shaft of an engine core shaft contact detection device of the present invention when performing constant pressure contact detection.

[0020] Figure 4 The present invention is a contact detection device for an engine spindle Figure 3 A partial enlarged schematic diagram in the middle.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of a core shaft of an engine core shaft contact detection device of the present invention when performing rotation torque dimension contact detection.

[0022] Figure 6 The present invention is a contact detection device for an engine spindle Figure 5 A partial enlarged schematic diagram of point B in the middle.

[0023] Figure 7 The present invention is a schematic diagram of the three-dimensional structure of a rotation detection component of an engine spindle contact detection device when performing size detection on a spindle.

[0024] Figure 8 The invention discloses a longitudinal full-section view of a rotation detection component of an engine spindle contact detection device when the spindle is being dimensionally detected.

[0025] Fig. 9 The present invention is a contact detection device for an engine spindle Figure 8 A partial enlarged schematic diagram of point C in the middle.

[0026] Fig.10 The present invention is a full cross-sectional view of a rotation detection component of an engine spindle contact detection device when performing dimensional detection on the spindle.

[0027] In the figure: 100, module bracket; 110, PPU bracket; 111, connecting plate; 120, PPU; 130, pneumatic clamping jaw assembly; 140, servo motor; 150, positioning seat; 151, electric steel slider; 152, slide rail; 160, pneumatic measurement assembly; 161, servo electric steel; 162, L-shaped plate; 163, cylinder 1; 164, displacement sensor; 165, contact; 166, ring gauge; 167, cylinder 2; 168, paddle; 170, gauge mounting plate; 200, rotation detection assembly; 210, support rod; 220, drive motor; 230, drive wheel; 310, fixed column; 320, fixed bag; 330, support bag; 331, air column; 332, paraffin; 340, position bag; 350, adjustment bag; 001, roller; 002, needle roller; 003, spindle; 004, body. DETAILED DESCRIPTION

[0028] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0029] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] See also Figure 1 , which is a schematic diagram of the appearance structure of an engine core shaft contact detection device of the present invention; the engine core shaft contact detection device of the present application adopts an effective combination of a pneumatic system and a motor drive to achieve high-precision contact size detection of the bearing, and ensures stable contact between the detection contact and the surface of the bearing to be measured by applying a constant pressure, thereby reducing the measurement error caused by unstable contact, improving the stability of the measurement, and achieving the technical effects of diverse detection content, improved accuracy of detection results, convenient operation and improved detection efficiency.

[0032] Embodiment 1: Figure 1-Figure 4 As shown, the present application is an engine spindle contact detection device, including a module bracket 100, a PPU bracket 110, a PPU 120, a pneumatic clamping jaw assembly 130, a servo motor 140, a positioning seat 150, a pneumatic measurement assembly 160, a gauge mounting plate 170, a third bracket 180 and a fixing plate 190; The module support 100 is a steel frame, which is used to provide a basic support structure for the entire device; The PPU bracket 110 is placed opposite to the module bracket 100 and is fixed to the module bracket 100 by bolt connection, and is used to install the PPU 120; The PPU 120 is fixed on the PPU bracket 110 and is used to provide air source and power support for the entire detection device; The pneumatic clamp assembly 130 is fixed to the PPU bracket 110 through the connecting plate 111 and is used to clamp and move the bearing; The servo motor 140 is fixed on the module bracket 100 and its output shaft is connected to the PPU 120; The positioning seat 150 is slidably connected to the slide rail 152 through the electric steel slider 151, and the slide rail 152 is fixed on the module bracket 100. The positioning seat 150 is used to place the bearing to be tested; The inspection fixture mounting plate 170 is fixed on the module bracket 100 to fix and support other components; The pneumatic measuring assembly 160 is fixed on the gauge mounting plate 170 , and the contact 165 with lateral movement moves on the bearing surface to perform constant pressure contact type dimensional detection on the core shaft 003 .

[0033] The pneumatic measuring assembly 160 includes a servo electric steel 161, an L-shaped plate 162, a cylinder 1 163, a displacement sensor 164, a contact 165, a pneumatic measuring ring gauge 166 and a cylinder 2 167; The servo electric steel 161 is fixed on the gauge mounting plate 170 and is used to drive the contact 165 to move for contact measurement; The L-shaped plate 162 is placed vertically and fixed on the servo electric steel 161; The cylinder 1 163 is placed vertically and fixed on the horizontal section of the L-shaped plate 162; The displacement sensor 164 is fixed on the servo electric steel 161 and is used to measure the displacement of the contact 165; The contact 165 is fixed to the bottom of the displacement sensor 164 and directly contacts the bearing roller 001 for measurement; The ring gauge 166 is detachably fixed on the gauge mounting plate 170 and is located below the piston rod of the cylinder 163, and is used to provide a measurement reference for the bearing roller 001; The second cylinder 167 is fixed on the inspection fixture mounting plate 170 and a paddle 168 is fixed on the piston end thereof, which is used to drive the paddle 168 to move and press the roller 001 .

[0034] The displacement sensor 164 is used to measure the displacement of the contact 165 in real time, and is preferably a linear displacement sensor that adopts an electric drive method. It is a prior art and will not be described in detail here.

[0035] When the embodiment of the present application is actually running, the steps are as follows: Step 1: Start the pneumatic clamp assembly 130 to clamp the bearing and move it to the position of the positioning seat 150; Step 2: After the pneumatic clamp assembly 130 places the bearing horizontally on the positioning seat 150, it returns to the initial position; Step 3: Start the electric steel slide block 151 and move it upward along the slide rail 152 until the bearing completely enters the pneumatic measuring ring gauge 166; Step 4: Start the second cylinder 167 to drive the paddle 168 to move toward the bearing side and press against the roller 001 of the bearing. At the same time, start the micro servo electric steel 161 to drive the contact 165 close to the bearing roller 001 and move straight along its surface to perform constant pressure contact detection; Step 5: The displacement data of the measuring contact 165 is collected in real time by the displacement sensor 164, and the data is transmitted to the processing system for analysis and processing; Step 6: After the detection is completed, the micro servo electric steel 161 is driven to retreat, so that the contact 165 is separated from the surface of the bearing roller 001, and the electric steel slider 151 is driven to drive the roller 001 to move downward and return to the initial position.

[0036] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Through the effective combination of pneumatic system and motor drive, constant pressure contact size detection of bearings is realized, which solves the problems of cumbersome manual operation and low detection accuracy in traditional detection methods, improves detection efficiency and accuracy, reduces measurement errors caused by unstable contact, improves measurement stability, and achieves the technical effects of diversified detection content, improved accuracy of detection results, convenient operation and improved detection efficiency.

[0037] Embodiment 2: Considering that the bearing is mostly in a rotating state during operation, the contact pressure of the roller 001 will change with the change of the working environment under different states of the bearing itself. This is undoubtedly a large unstable factor for the detection of dimensional accuracy. For long-term detection results, there will inevitably be tolerance influence, temperature change influence and structural wear influence. In order to further perform more accurate dimensional detection on the mandrel 003, this application proposes the following technical solutions for the above technical problems, specifically: like Figure 5 and Figure 6 As shown, a rotation detection component 200 is fixed to the telescopic end of the cylinder 163, and the rotation detection component 200 is used to detect the size of the core shaft 003 when the roller 001 is in a rotating state.

[0038] The rotation detection assembly 200 includes a support rod 210, a driving motor 220, a driving wheel 230, a fixing column 310 and a fixing capsule 320; The support rod 210 is an L-shaped structure and is fixed on the inspection fixture mounting plate 170; The driving motor 220 is fixed on the inspection fixture mounting plate 170 and is located below the support rod 210, and is used to drive the driving wheel 230 to rotate; The driving wheel 230 is rotatably connected to the support rod 210 and fixedly connected to the output shaft of the driving motor 220, and is used to drive the bearing roller 001 to rotate to achieve dynamic detection; The fixed column 310 is fixed to the telescopic end of the cylinder 163; The fixing capsule 320 is fixed on the outside of the fixing column 310 and is used to fix the vertically placed core shaft 003 and detect the axis size.

[0039] The present application can fix the position of the core shaft 003 by gas expansion by setting a fixing bag 320, and can monitor the air pressure change of the fixing bag 320 through the rotation state of the roller 001, and further can detect the position and size changes of the core shaft 003 under different rotation speed states of the outer roller 001.

[0040] By placing the bearing horizontally and using the driving wheel 230 to drive the outer ring roller 001 to rotate, the present application can truly simulate the stress conditions of the core shaft 003 in the working state. The dynamic detection method can more accurately reflect the actual size change and working stability of the core shaft 003 than the static detection method; the fixed bag 320 is used to extend into the interior of the core shaft 003 under the action of the piston rod of the cylinder 163, and the core shaft 003 is fixed by gas expansion, which can effectively prevent the core shaft 003 from moving or shaking during the detection process, thereby ensuring the stability and reliability of the detection result; by detecting the change in gas pressure to indirectly judge whether the size of the core shaft 003 is qualified, the wear and error that may be caused by contact measurement is avoided, and the measurement error is reduced. At the same time, it is suitable for the size detection of core shafts 003 of different specifications and types, and has strong flexibility and versatility.

[0041] Embodiment 3: Considering that the fixed capsule 320 is flexible, when the roller 001 is in a high-speed rotating state, the core shaft 003 and the axis of the fixed capsule 320 will be offset, resulting in the core shaft 003 being unstable during the detection process. In order to improve the detection stability and detection accuracy, the present application proposes the following technical solutions for the above technical problems, specifically: like Figure 7 and Figure 8 As shown, a plurality of groups of support bags 330 are fixed between the interior of the fixing bag 320 and the fixing column 310 , each group of the support bags 330 are arranged up and down and each group of the support bags 330 includes four circumferentially arranged support bags 330 , and the support bags 330 are placed horizontally to increase the support and stability of the fixing bag 320 .

[0042] The interior of the fixing bag 320 and the support bag 330 are connected to the air pump through external pipes. The external air pipes of the fixing bag 320 and the support bag 330 are different, and pressure sensor 1 and pressure sensor 2 are respectively provided on their external pipes. The pressure sensor 1 and pressure sensor 2 are used to detect the internal air pressure of the fixing bag 320 and the support bag 330 respectively.

[0043] The present application provides additional support for the fixing capsule 320 by setting up a support capsule 330, thereby effectively preventing the core shaft 003 from being offset from the axis of the fixing capsule 320 during high-speed rotation, reducing the measurement error caused by the axis offset, and facilitating a more accurate evaluation of the size and performance of the core shaft 003, so that the fixing capsule 320 can adapt to the high-speed rotating detection environment, thereby expanding the scope of application of the detection device.

[0044] Embodiment 4: In order to further improve the stability of the mandrel 003 and the support of the fixing capsule 320, so that the present application can adapt to the support and fixation of the mandrel 003 at different rotation speeds and make the detection result more accurate, the present application proposes the following technical solutions for the above technical problems, specifically: like Figure 8 and Fig. 9 As shown, the support bag 330 is a cylindrical structure having two parts, including an air column 331 and a placement cavity; The gas column 331 is located in the middle of the support bag 330, and the outside is filled with paraffin 332 to enhance the stability of the fixing bag 320; The placement cavity is an annular structure and is located outside the air column 331 . Paraffin 332 is arranged inside the placement cavity to enhance the stability of the fixing capsule 320 .

[0045] The present application provides additional support force for the fixed capsule 320 by filling the placement cavity with paraffin 332. Especially when the mandrel 003 is in a high-speed rotating state, this support force helps to reduce the relative movement between the mandrel 003 and the fixed capsule 320, thereby improving the stability during the detection process. At the same time, the internal air column 331 and the external paraffin layer together constitute a more stable support structure. The air column 331 provides initial support and buffering, while the paraffin layer further enhances the support effect through its plasticity, so that the fixed capsule 320 can better adapt to the different shapes and sizes of the mandrel 003, can adapt to different monitoring needs, and expand the detection range.

[0046] Embodiment 5: Considering that in actual applications, the mandrel 003 may face various complex working conditions, such as high temperature, high-speed rotation, etc., and because the mechanical dimensions are affected by their own temperature to a certain extent, it is equally important to detect the dimensions of the mandrel 003 at different temperatures generated at different speeds. In view of the above technical problems, the present application proposes the following technical solutions, specifically: like Fig. 9 and Fig.10 As shown, a thermocouple detector is fixed to one end of each support bag 330 close to the core shaft 003, and the thermocouple detector is used to detect the temperature of the core shaft 003 when the roller 001 rotates at different speeds.

[0047] A group of position capsules 340 is fixed to the outer side of one end of each support capsule 330 close to the core shaft 003 , and each group of position capsules 340 includes two position capsules 340 arranged up and down, and the position capsules 340 are spherical capsule structures.

[0048] A plurality of adjustment capsules 350 are fixed to the outside of the fixing capsule 320 . The adjustment capsules 350 are annular in structure and correspond one to one with each group of support capsules 330 , and are used to cooperate with the position capsules 340 to achieve fine adjustment of the position of the thermocouple detection point.

[0049] The thermocouple detector is used to detect the temperature change of the core shaft 003 in real time, and is preferably an S-type thermocouple made of platinum-rhodium-platinum alloy. It is a prior art and will not be described in detail here.

[0050] The present application can more accurately evaluate the size and performance of the core shaft 003 by real-time monitoring of the temperature changes of the core shaft 003 under different rotation speeds, combined with the changes in the gas pressure in the fixed capsule 320, and the multi-parameter comprehensive detection method significantly improves the accuracy and reliability of the detection; through the mutual cooperation of the position capsule 340 and the adjustment capsule 350, the fine-tuning of the thermocouple detection site can be achieved, so that the detection device can adapt to the detection requirements of core shafts 003 of different specifications and types, thereby improving the flexibility and versatility of the detection; through the mutual cooperation of the thermocouple detector and the fine-tuning mechanism, it helps to reduce human intervention, improve detection efficiency, and reduce the impact of human errors on the detection results.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An engine spindle contact detection device, characterized in that: The invention comprises a module support (100), a PPU support (110), a PPU (120), a pneumatic clamping jaw assembly (130), a servo motor (140), a positioning seat (150), a pneumatic measuring assembly (160), a gauge mounting plate (170), a third support (180) and a fixing plate (190); the module support (100) is a steel frame, used to provide a basic support structure for the entire device; the PPU support (110) is placed opposite to the module support (100) and is fixed to the module support (100) by bolt connection, and is used to install the PPU (120); the PPU (120) is fixed to the PPU support (110), and is used to provide an air source and power support for the entire detection device; the pneumatic clamping jaw assembly (13 ... The connecting plate (111) is fixed on the PPU bracket (110) and is used for clamping and moving the bearing; the servo motor (140) is fixed on the module bracket (100) and its output shaft is connected to the PPU (120); the positioning seat (150) is slidably connected to the slide rail (152) through the electric steel slider (151), and the slide rail (152) is fixed on the module bracket (100), and the positioning seat (150) is used for placing the bearing to be tested; the inspection fixture mounting plate (170) is fixed on the module bracket (100) and is used for fixing and supporting other components; the pneumatic measurement component (160) is fixed on the inspection fixture mounting plate (170), and a contact (165) with a lateral movement moves on the bearing surface to perform constant pressure contact type size detection on the core shaft.

2. An engine spindle contact detection device as claimed in claim 1, characterized in that: The pneumatic measurement assembly (160) comprises a servo electric steel (161), an L-shaped plate (162), a first cylinder (163), a displacement sensor (164), a contact (165), a pneumatic measuring ring gauge (166) and a second cylinder (167); the servo electric steel (161) is fixed on the gauge mounting plate (170) and is used to drive the contact (165) to move for contact measurement; the L-shaped plate (162) is placed vertically and fixed on the servo electric steel (161); the first cylinder (163) is placed vertically and fixed on the horizontal section of the L-shaped plate (162); the displacement sensor (164) is fixed The contact (165) is fixed on the servo electric steel (161) and is used to measure the displacement of the contact (165); the contact (165) is fixed on the bottom of the displacement sensor (164) and directly contacts the bearing roller (001) for measurement; the ring gauge (166) is fixed on the gauge mounting plate (170) in a detachable manner and is located below the piston rod of the cylinder one (163), and is used to provide a measurement reference for the bearing roller (001); the cylinder two (167) is fixed on the gauge mounting plate (170) and has a paddle (168) fixed on its piston end, which is used to drive the paddle (168) to move and press the roller (001).

3. An engine spindle contact detection device as claimed in claim 2, characterized in that: A rotation detection component (200) is fixed to the telescopic end of the cylinder 1 (163), and the rotation detection component (200) is used to detect the size of the core shaft (003) when the roller (001) is in a rotating state.

4. An engine spindle contact detection device as claimed in claim 3, characterized in that: The rotation detection assembly (200) comprises a support rod (210), a drive motor (220), a drive wheel (230), a fixed column (310) and a fixed capsule (320); the support rod (210) is an L-shaped structure and is fixed on the inspection fixture mounting plate (170); the drive motor (220) is fixed on the inspection fixture mounting plate (170) and is located below the support rod (210) and is used to drive the drive wheel (230) to rotate; the drive wheel (230) is rotatably connected to the support rod (210) and is fixedly connected to the output shaft of the drive motor (220) and is used to drive the bearing roller (001) to rotate to achieve dynamic detection; the fixed column (310) is fixed to the telescopic end of the cylinder (163); the fixed capsule (320) is fixed to the outside of the fixed column (310) and is used to fix the vertically placed core shaft (003) and detect the axis size.

5. The engine spindle contact detection device according to claim 4, characterized in that: A plurality of groups of support sacs (330) are fixed between the interior of the fixing sac (320) and the fixing column (310), each group of the support sacs (330) is arranged vertically and each group of the support sacs (330) includes four circumferentially arranged support sacs (330), and the support sacs (330) are placed horizontally to increase the support and stability of the fixing sac (310).

6. The engine spindle contact detection device according to claim 5, characterized in that: The interior of the fixing bag (310) and the supporting bag (330) are connected to the air pump via external pipes. The fixing bag (310) and the supporting bag (330) have different external air pipes and pressure sensor 1 and pressure sensor 2 are respectively provided on their external pipes. The pressure sensor 1 and pressure sensor 2 are used to detect the internal air pressure of the fixing bag (310) and the supporting bag (330) respectively.

7. An engine spindle contact detection device as claimed in claim 6, characterized in that: The support bag (330) is a cylindrical structure having two parts, including an air column (331) and a placement cavity; The air column (331) is located in the middle of the support bag (330), and is filled with paraffin (332) on the outside to enhance the stability of the fixing bag (310); the placement cavity is an annular structure and is located outside the air column (331), and paraffin (332) is arranged inside the placement cavity to enhance the stability of the fixing bag (310).

8. An engine spindle contact detection device as claimed in claim 7, characterized in that: A thermocouple detector is fixed to one end of each support bag (330) close to the core shaft (003), and the thermocouple detector is used to detect the temperature of the core shaft (003) when the roller (001) is at different rotation speeds.

9. An engine spindle contact detection device as claimed in claim 8, characterized in that: A group of position capsules (340) is fixed to the outer side of one end of each support capsule (330) close to the core shaft (003), and each group of position capsules (340) includes two position capsules (340) arranged up and down, and the position capsules (340) are spherical capsule structures.

10. An engine spindle contact detection device as claimed in claim 9, characterized in that: A plurality of adjustment capsules (350) are fixed outside the fixing capsule (320); the adjustment capsules (350) are annular structures and correspond one-to-one to each group of support capsules (330), and are used to cooperate with the position capsules (340) to achieve fine adjustment of the position of the thermocouple detection point.

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