A crankshaft testing device for SPC testing stations

Abstract

The utility model provides a kind of crankshaft detection device suitable for SPC detection station, it is specifically related to quality detection technical field, to solve the technical defects of the detection head of existing crankshaft aerodynamic quantity SPC measurement station.This device is used to be integrated to be connected to crankshaft aerodynamic quantity SPC measurement station and replace its detection head, including aerodynamic quantity appearance and combined measuring head, combined measuring head front end is equipped with aerodynamic measuring mouth;Still include a plurality of first pedestal that can be spliced;Linear slide and vertical lifting assembly are equipped on each first pedestal, vertical lifting assembly is slidably connected on linear slide, combined measuring head is installed on the micro guide rail of vertical lifting assembly;Integrated in combined measuring head, including non-contact profile sensor, profile sensor is parallel with the measurement axis of aerodynamic measuring mouth and interval adjustable, the measurement area of profile sensor and aerodynamic measuring mouth is in the same axial section.This device can replace existing handle type detection head, without artificial to crankshaft single journal is detected in turn.

Description

Technical Field

[0001] This utility model relates to the field of quality inspection technology, and more specifically, to a crankshaft inspection device suitable for SPC inspection stations. Background Technology

[0002] As a core transmission component of power equipment such as internal combustion engines and compressors, the crankshaft's journal outer diameter accuracy, roundness, cylindricity, and other geometric tolerances directly determine the equipment's assembly clearance, operational stability, and service life. In mass production scenarios, to achieve real-time monitoring and process control of crankshaft machining quality, the industry commonly uses crankshaft pneumatic quantity SPC (Statistical Process Control) measurement stations. These stations collect journal dimension data through pneumatic detection heads and combine this data with the SPC system to analyze production process fluctuations and prevent the generation of defective products.

[0003] Currently, the existing crankshaft aerodynamics SPC measurement stations still have the following technical shortcomings in their testing heads and supporting devices: most existing SPC measurement stations use handle-type testing heads, requiring manual inspection of individual journals of the crankshaft sequentially. If a longer crankshaft needs to be inspected, the inspection will take much longer and significantly increase the workload of the staff. Utility Model Content

[0004] The purpose of this invention is to provide a crankshaft inspection device suitable for SPC inspection stations, which can replace the existing handle-type inspection head and eliminate the need for manual inspection of individual journals of the crankshaft. When inspecting longer crankshafts, it does not require significantly more time, thereby greatly reducing the workload of the operators.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A crankshaft testing device suitable for SPC testing stations, for integration and connection to a crankshaft aerodynamic SPC measurement station and replacement of its testing head, comprising:

[0007] The measurement execution module includes a pneumatic measuring instrument and a combined measuring head. The pneumatic measuring instrument and the combined measuring head are connected through a flexible air tube. The front end face of the combined measuring head is provided with a pneumatic measuring nozzle.

[0008] The three-dimensional adjustment module includes multiple splicable first bases; each first base is provided with a linear slide and a vertical lifting component, the linear slide is fixed to the first base, the vertical lifting component is slidably connected to the linear slide, and the combined measuring head is installed on the miniature guide rail of the vertical lifting component;

[0009] A multi-parameter sensing module, integrated into a combined measuring head, includes a non-contact profile sensor. The profile sensor is parallel to and the distance between the measuring axis of the pneumatic nozzle is adjustable. The measuring areas of the profile sensor and the pneumatic nozzle are in the same axial section.

[0010] In some embodiments, the linear slide is arranged along the length of the first base, the slider on the linear slide is driven to slide by a first servo motor, the vertical lifting assembly is slidably connected to the linear slide via the slider, the vertical lifting assembly includes a ball screw, the driving end of the ball screw is connected to a second servo motor, and the combined measuring head is mounted on the output end of the vertical lifting assembly via an adapter plate.

[0011] In some embodiments, a grating ruler is fixed to the side of the linear slide, and the reading head of the grating ruler is fixedly connected to the slider; the vertical lifting assembly also includes a miniature guide rail that is fixedly installed on the nut on the ball screw and has a sliding block driven by a third servo motor. The miniature guide rail is arranged perpendicular to the length direction of the first base, and the top of the sliding block of the miniature guide rail is fixedly connected to the adapter plate. The mounting seat of the ball screw is fixed to the vertical bracket by a locking nut, and the vertical bracket is perpendicularly connected to the slider of the linear slide.

[0012] In some embodiments, the combined measuring head has at least four pneumatic nozzles arranged in a ring array on the front end face of the combined measuring head; the flexible air tube is a metal braided corrugated tube, with both ends connected to the pneumatic measuring instrument and the combined measuring head respectively via quick-connect couplings; the air inlet of the pneumatic measuring instrument is connected to a filter and then connected to an air pump station.

[0013] In some embodiments, the contour sensor includes a laser displacement sensor, the measuring axis of which is parallel to the central axis of the pneumatic nozzle and is slidably connected to the combined measuring head, such that the interval between the measuring axis of the laser displacement sensor and the central axis of the pneumatic nozzle is adjustable.

[0014] In some embodiments, the first base is provided with splicing interfaces at both ends. The splicing interface includes a concave mating groove and a convex connecting block. The mating surfaces of the two are provided with positioning keys. The splicing interface is fixed by locking bolts, and the axis of the locking bolts is perpendicular to the length direction of the first base.

[0015] In some embodiments, an automatic calibration module is further included. The automatic calibration module includes a second base detachably connected to the front or rear face of the first base via a splicing interface. A standard ring gauge frame is slidably connected to the second base via a horizontal guide rail. A standard ring gauge is installed on the standard ring gauge frame. Along the length direction of the first base, a telescopic cylinder is provided on the side of the standard ring gauge away from the combined measuring head. The piston rod of the telescopic cylinder is coaxially fixed with the standard ring gauge frame. The axis of the telescopic cylinder is parallel to the length direction of the first base. The telescopic cylinder is electrically connected to the SPC measuring station via a solenoid valve. The SPC measuring station controls the telescopic cylinder to extend and retract via the solenoid valve, driving the standard ring gauge frame to move along the horizontal guide rail to the detection area of ​​the combined measuring head.

[0016] In some embodiments, the first base is provided with a shock-absorbing support assembly at its bottom. The shock-absorbing support assembly includes adjustable legs, and the bottom of the adjustable legs is provided with rubber shock-absorbing pads. The first base is connected to the mounting surface through the shock-absorbing support assembly.

[0017] In some embodiments, a mounting slot is provided on the top of the first base at a position located on the outer side of both ends of the linear slide. A V-block positioning seat is detachably connected to the mounting slot. The V-block positioning seat is adapted to the support journals at both ends of the crankshaft to fix the crankshaft.

[0018] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0019] 1. This device can replace the existing handle-type inspection head, eliminating the need for manual inspection of individual journals of the crankshaft. When inspecting longer crankshafts, it does not require significantly more time, thus greatly reducing the workload for operators. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a top view of a crankshaft testing device suitable for an SPC testing station, provided in an embodiment of the present invention;

[0022] Figure 2 A top view of a crankshaft testing device suitable for an SPC testing station, provided in an embodiment of this utility model, using an automatic calibration module;

[0023] Figure 3A side view of the first base provided in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the V-shaped block positioning seat structure provided in the embodiments of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the combined measuring head end provided in an embodiment of the present invention.

[0026] Icons: 1. Pneumatic measuring instrument; 2. Combined measuring head; 3. Flexible air tube; 4. Pneumatic nozzle; 5. First base; 6. Linear slide; 7. First servo motor; 8. Slider; 9. Adapter plate; 10. Grating ruler; 11. Reading head; 12. Mounting base; 13. Vertical bracket; 14. Quick-connect coupling; 15. Filter; 16. Air pump station; 17. Laser displacement sensor; 18. Concave docking groove; 19. Convex connecting block; 20. Positioning key; 21. Locking bolt; 22. Second base; 23. Horizontal slide rail; 24. Standard ring gauge frame; 25. Standard ring gauge; 26. Telescopic cylinder; 27. Solenoid valve; 28. Adjustable support foot; 29. ​​Rubber shock-absorbing pad; 30. Mounting slot; 31. V-block positioning seat; 32. Second servo motor; 33. Miniature guide rail; 34. Third servo motor. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Please see Figures 1-5 As shown, the main body of this embodiment is a crankshaft testing device suitable for SPC testing stations, used to integrate and connect to the crankshaft aerodynamic SPC measurement station and replace its testing head, including:

[0033] The measurement execution module includes a pneumatic measuring instrument 1 and a combined measuring head 2. The pneumatic measuring instrument 1 and the combined measuring head 2 are connected by a flexible air tube 3. The front end face of the combined measuring head 2 is provided with a pneumatic measuring nozzle 4.

[0034] The three-dimensional adjustment module includes multiple splicable first bases 5; each first base 5 is provided with a linear slide 6 and a vertical lifting component, the linear slide 6 is fixed to the first base 5, the vertical lifting component is slidably connected to the linear slide 6, and the combined measuring head 2 is installed on the miniature guide rail 33 of the vertical lifting component.

[0035] A multi-parameter sensing module is integrated into the combined measuring head 2, including a non-contact profile sensor. The profile sensor is parallel to the measuring axis of the pneumatic nozzle 4 and the spacing is adjustable. The measuring areas of the profile sensor and the pneumatic nozzle 4 are in the same axial section.

[0036] Furthermore, the linear slide 6 is arranged along the length of the first base 5, the slider 8 on the linear slide 6 is driven to slide by the first servo motor 7, the vertical lifting assembly is slidably connected to the linear slide 6 through the slider 8, the vertical lifting assembly includes a ball screw, the driving end of the ball screw is connected to the second servo motor 32, and the combined measuring head 2 is installed on the output end of the vertical lifting assembly through the adapter plate 9.

[0037] Furthermore, a grating ruler 10 is fixed to the side of the linear slide 6, and the reading head 11 of the grating ruler 10 is fixedly connected to the slider 8; the vertical lifting assembly also includes a miniature guide rail 33 that is fixedly installed on the nut on the ball screw and has a sliding block driven by a third servo motor 34. The miniature guide rail 33 is arranged perpendicular to the length direction of the first base 5. The top of the sliding block of the miniature guide rail 33 is fixedly connected to the adapter plate 9. The mounting seat 12 of the ball screw is fixed to the vertical bracket 13 by a locking nut. The vertical bracket 13 is vertically connected to the slider 8 of the linear slide 6.

[0038] Furthermore, the combined measuring head 2 has at least four pneumatic nozzles 4, which are arranged in a ring array on the front end face of the combined measuring head 2; the flexible air tube 3 is a metal braided corrugated tube, and its two ends are connected to the pneumatic measuring instrument 1 and the combined measuring head 2 respectively through quick-connect couplings 14; the air inlet end of the pneumatic measuring instrument 1 is connected to the filter 15 and then connected to the air pump station 16.

[0039] Furthermore, the contour sensor includes a laser displacement sensor 17, the measuring axis of which is parallel to the central axis of the pneumatic nozzle 4, and the laser displacement sensor 17 is slidably connected to the combined measuring head 2, so that the interval between the measuring axis of the laser displacement sensor 17 and the central axis of the pneumatic nozzle 4 is adjustable.

[0040] Furthermore, the first base 5 is provided with splicing interfaces at both ends. The splicing interface includes a concave mating groove 18 and a convex connecting block 19. The mating surfaces of the two are provided with positioning keys 20. The splicing interface is fixed by locking bolts 21. The axis of the locking bolts 21 is perpendicular to the length direction of the first base 5.

[0041] Furthermore, it also includes an automatic calibration module, which includes a second base 22 detachably connected to the front or rear face of the first base 5 via a splicing interface. A standard ring gauge frame 24 is slidably connected to the second base 22 via a horizontal guide rail. A standard ring gauge 25 is installed on the standard ring gauge frame 24. Along the length direction of the first base 5, a telescopic cylinder 26 is provided on the side of the standard ring gauge 25 away from the combined measuring head 2. The piston rod of the telescopic cylinder 26 is coaxially fixed with the standard ring gauge frame 24. The axis of the telescopic cylinder 26 is parallel to the length direction of the first base 5. The telescopic cylinder 26 is electrically connected to the SPC measuring station via a solenoid valve 27. The SPC measuring station controls the telescopic cylinder 26 to extend and retract via the solenoid valve 27, driving the standard ring gauge frame 24 to move along the horizontal guide rail to the detection area of ​​the combined measuring head 2.

[0042] Furthermore, the first base 5 is provided with a shock-absorbing support assembly at its bottom. The shock-absorbing support assembly includes an adjustable support leg 28, and the bottom of the adjustable support leg 28 is provided with a rubber shock-absorbing pad 29. The first base 5 is connected to the mounting surface through the shock-absorbing support assembly.

[0043] Furthermore, a mounting slot 30 is provided on the top of the first base 5 at the position on the outer side of both ends of the linear slide. A V-block positioning seat 31 is detachably connected to the mounting slot 30. The V-block positioning seat 31 is adapted to the support journals at both ends of the crankshaft to fix the crankshaft.

[0044] The combined measuring head 2 of this device performs contact measurement of the crankshaft's outer diameter via a pneumatic probe 4. Dimensional detection is achieved using the pneumatic probe 4 connected to the pneumatic gauge 1: when the pneumatic probe 4 contacts the crankshaft surface, the change in airflow area causes a change in differential pressure, which the pneumatic gauge 1 converts into dimensional deviation data. Simultaneously, a laser displacement sensor 17 integrated into the combined measuring head 2 performs non-contact scanning of the crankshaft profile at the same axial cross-section in a direction parallel to the axis of the pneumatic probe 4, calculating surface profile data based on laser reflection time or phase difference. Both data are acquired synchronously, achieving multi-parameter fusion of contact dimensional measurement and non-contact profile analysis.

[0045] The linear slide 6 slides along the length of the first base 5, forming a two-dimensional motion mechanism with the vertical movement of the vertical lifting component. A servo motor drives the slider 8 and the lifting component to move, and the grating ruler 10 provides real-time displacement data feedback. Furthermore, the structure of the micro-guide rail 33 enables precise positioning of the combined measuring head 2 along the X, Y, and Z axes. Multiple first bases 5 are combined through splicing interfaces, extending the length of the measuring device and adapting to multi-journey detection of crankshafts of different specifications. The spliced ​​bases are rigidly connected to ensure overall motion accuracy.

[0046] The SPC measuring station controls the telescopic cylinder 26 via solenoid valve 27, driving the standard ring gauge frame 24 to move along the horizontal guide rail to the detection area of ​​the combined measuring head 2. During calibration, the combined measuring head 2 first measures the standard ring gauge 25 (with known precise dimensions). The pneumatic gauge 1 and laser displacement sensor 17 respectively collect the dimensional and contour data of the standard ring gauge 25, comparing them with theoretical values ​​to generate error compensation parameters. These parameters are automatically imported into the SPC measuring station's algorithm to correct systematic errors during subsequent crankshaft measurements, ensuring the long-term stability of measurement accuracy.

[0047] It is worth mentioning that the crankshaft is placed on the V-block positioning seat 31 by supporting journals at both ends. The V-block is detachably installed in the mounting slot 30 on the top of the first base 5. The symmetrical support structure restricts the radial and axial displacement of the crankshaft, ensuring that the crankshaft is fixed in position during measurement. The vibration damping support assembly compensates for the flatness of the mounting surface by adjusting the height of the support feet and absorbs external vibrations through rubber pads, avoiding data deviations caused by vibration during measurement.

[0048] How to use this device:

[0049] First, based on the crankshaft length, multiple first bases 5 are connected end-to-end via splicing interfaces. Positioning keys 20 ensure coaxiality, and locking bolts 21 secure the connection. Vibration damping support components are installed at the bottom of the first bases 5, and the feet are adjusted to level the bases. The pneumatic gauge 1 is connected to the combined measuring head 2 via a metal braided corrugated pipe, with the air source connected via filter 15. Electrical components such as the laser displacement sensor 17, servo motor, and grating ruler 10 are electrically connected to the SPC measuring station.

[0050] Then, the SPC measuring station sends a command, and solenoid valve 27 controls telescopic cylinder 26 to extend, pushing the standard ring gauge frame 24 along the horizontal guide rail to the front of the combined measuring head 2. The three-dimensional adjustment module drives the combined measuring head 2 closer to the standard ring gauge 25, and pneumatic nozzle 4 and laser displacement sensor 17 respectively collect the size and contour data of the standard ring gauge 25. The SPC measuring station compares the measured data with the standard value, generates calibration coefficients and stores them for real-time correction of subsequent measurement data.

[0051] Subsequently, V-block positioning seats 31 are inserted into the outermost mounting slots 30 on the first bases 5 at both ends, and the crankshaft end support journals are placed on the V-block positioning seats 31 to ensure accurate axial positioning. The first servo motor drives the linear slide 6 and the vertical lifting assembly to move the combined measuring head 2 to the axial section position of the journal to be tested, and the laser displacement sensor 17 is aligned with the measuring axis of the pneumatic nozzle 4 in the target area. The pneumatic measuring instrument 1 is activated, and compressed air is ejected through the nozzle. After contacting the crankshaft surface, a differential pressure signal is formed, which is converted into outer diameter data; the laser displacement sensor 17 emits a laser beam to scan the crankshaft surface, and the SPC measuring station generates a contour curve.

[0052] The SPC measurement station receives data from the pneumatic gauge 1 and the laser sensor in real time, and performs error compensation by combining the calibration coefficient to generate parameters such as journal dimension deviation, roundness, and surface roughness.

[0053] Data is analyzed according to SPC statistical rules (such as control charts and process capability index calculations) to determine whether the crankshaft is qualified. The results are output in reports or graphical interfaces and stored in the database for traceability.

[0054] After the measurement is completed, the three-dimensional adjustment module will return the combined measuring head 2 to its initial position, and the crankshaft will be removed from the V-block.

[0055] It is worth mentioning that the high-precision dimensional detection of the pneumatic probe 4 is combined with the contour analysis of the laser sensor to simultaneously acquire dimensional deviation and surface morphology data, thereby improving the comprehensiveness of the detection.

[0056] In addition, the detachable splicing of the first base 5 can adapt to the testing needs of crankshafts of different lengths, reduce equipment customization costs, and improve versatility.

[0057] Secondly, the use of the standard ring gauge 25 can compensate for errors, reduce manual calibration errors, and meet the high-precision requirements of SPC online monitoring.

[0058] Furthermore, the combination of V-block positioning and damping components ensures stable crankshaft fixation and resistance to external interference, improving measurement repeatability.

[0059] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crankshaft testing device suitable for an SPC testing station, used for integrated connection to a crankshaft aerodynamic SPC measurement station and replacing its testing head, characterized in that, include: The measurement execution module includes a pneumatic measuring instrument (1) and a combined measuring head (2). The pneumatic measuring instrument (1) and the combined measuring head (2) are connected by a flexible air tube (3). The front end face of the combined measuring head (2) is provided with a pneumatic measuring nozzle (4). The three-dimensional adjustment module includes multiple splicable first bases (5); each first base (5) is provided with a linear slide (6) and a vertical lifting component, the linear slide (6) is fixed to the first base (5), the vertical lifting component is slidably connected to the linear slide (6), and the combined measuring head (2) is installed on the miniature guide rail (33) of the vertical lifting component; The multi-parameter sensing module is integrated into the combined measuring head (2), including a non-contact profile sensor. The profile sensor is parallel to the measuring axis of the pneumatic nozzle (4) and the interval is adjustable. The measuring areas of the profile sensor and the pneumatic nozzle (4) are in the same axial section.

2. The crankshaft testing device suitable for SPC testing stations according to claim 1, characterized in that, The linear slide (6) is arranged along the length of the first base (5). The slider (8) on the linear slide (6) is driven to slide by the first servo motor (7). The vertical lifting assembly is slidably connected to the linear slide (6) through the slider (8). The vertical lifting assembly includes a ball screw. The driving end of the ball screw is connected to the second servo motor (32). The combined measuring head (2) is installed on the output end of the vertical lifting assembly through the adapter plate (9).

3. A crankshaft testing device suitable for SPC testing stations according to claim 2, characterized in that, A grating ruler (10) is fixed to the side of the linear slide (6), and the reading head (11) of the grating ruler (10) is fixedly connected to the slider (8). The vertical lifting assembly also includes a miniature guide rail (33) that is fixedly installed with the nut on the ball screw and has its sliding block driven by a third servo motor (34). The miniature guide rail (33) is set perpendicular to the length direction of the first base (5). The top of the sliding block of the miniature guide rail (33) is fixedly connected to the adapter plate (9). The mounting seat (12) of the ball screw is fixed to the vertical bracket (13) by a locking nut. The vertical bracket (13) is vertically connected to the slider (8) of the linear slide (6).

4. A crankshaft testing device suitable for SPC testing stations according to claim 1, characterized in that, The combined measuring head (2) has at least four pneumatic probes (4) arranged in a ring array on the front end face of the combined measuring head (2); the flexible air tube (3) is a metal braided corrugated tube, and its two ends are connected to the pneumatic measuring instrument (1) and the combined measuring head (2) respectively through quick-connect fittings (14); the air inlet of the pneumatic measuring instrument (1) is connected to the air pump station (16) after being connected to the filter (15).

5. A crankshaft testing device suitable for SPC testing stations according to claim 1, characterized in that, The contour sensor includes a laser displacement sensor (17), the measuring axis of which is parallel to the central axis of the pneumatic nozzle (4) and the laser displacement sensor (17) is slidably connected to the combined measuring head (2), so that the interval between the measuring axis of the laser displacement sensor (17) and the central axis of the pneumatic nozzle (4) is adjustable.

6. A crankshaft testing device suitable for an SPC testing station according to claim 1, characterized in that, The first base (5) has splicing interfaces at both ends. The splicing interfaces include concave docking grooves (18) and convex connecting blocks (19). The mating surfaces of the two are provided with positioning keys (20). The splicing interfaces are fixed by locking bolts (21). The axis of the locking bolts (21) is perpendicular to the length direction of the first base (5).

7. A crankshaft testing device suitable for an SPC testing station according to claim 6, characterized in that, It also includes an automatic calibration module, which includes a second base (22) that is detachably connected to the front or rear face of the first base (5) via a splicing interface. A standard ring gauge frame (24) is slidably connected to the second base (22) via a horizontal guide rail. A standard ring gauge (25) is installed on the standard ring gauge frame (24). Along the length direction of the first base (5), a telescopic cylinder (26) is provided on the side of the standard ring gauge (25) away from the combined measuring head (2). The piston rod of the telescopic cylinder (26) is coaxially fixed with the standard ring gauge frame (24). The axis of the telescopic cylinder (26) is parallel to the length direction of the first base (5). The telescopic cylinder (26) is electrically connected to the SPC measuring station via a solenoid valve (27). The SPC measuring station controls the telescopic cylinder (26) to extend and retract via the solenoid valve (27), driving the standard ring gauge frame (24) to move along the horizontal guide rail to the detection area of ​​the combined measuring head (2).

8. A crankshaft testing device suitable for SPC testing stations according to claim 1, characterized in that, The first base (5) is provided with a shock-absorbing support assembly at its bottom. The shock-absorbing support assembly includes an adjustable support leg (28). The bottom of the adjustable support leg (28) is provided with a rubber shock-absorbing pad (29). The first base (5) is connected to the mounting surface through the shock-absorbing support assembly.

9. A crankshaft testing device suitable for an SPC testing station according to claim 1, characterized in that, The first base (5) is provided with a mounting slot (30) on the top of the linear slide (6) at the outer side of both ends. A V-block positioning seat (31) is detachably connected to the mounting slot (30). The V-block positioning seat (31) is adapted to the support journals at both ends of the crankshaft to fix the crankshaft.

Images