Automobile engine crankshaft measuring equipment

Abstract

The invention relates to the technical field of crankshaft measurement, in particular to automobile engine crankshaft measurement equipment, which comprises a placement plate of which the top end is fixedly connected with a supporting column, a mounting frame which is connected to the supporting column in a sliding manner, a dial indicator which is fixedly mounted on the inner side of the mounting frame through a bolt, and locking assemblies which are arranged on the two sides of the mounting frame, a direction adjusting assembly is arranged on the front side of the mounting frame, probe rod assemblies are arranged inside and on the front side of the direction adjusting assembly, and a clamping assembly is arranged on the rear side of the mounting frame. According to the invention, a dual-calibration structure capable of rapid conversion and adjustment is arranged on an original magnetic support, so that the measurement precision of the dial indicator is improved, and the continuity and accuracy of multiple measurements are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crankshaft measurement, and more particularly to a kind of automobile engine crankshaft measuring equipment. BACKGROUND

[0002] Crankshaft is the most important component in engine, it bears the force from connecting rod, and converts it into torque through crankshaft output and drives other accessories on engine work.In order to ensure that the size, shape accuracy and dynamic balance of crankshaft meet the standards, protect the assembly, run smoothly and reliably, prevent abnormal wear and failure, in the process of manufacturing crankshaft, precision measurement of crankshaft is needed.

[0003] Among them, the radial runout of crankshaft needs to be measured by using a micrometer with a magnetic support.In the process of measurement, the automobile crankshaft is installed on the rack, the connecting shaft at both ends of the crankshaft provides support for rotation, and the central axis of the reference shaft is the basic rotation center line.In the process of measurement, the connecting shaft at both ends of the crankshaft is rotated, so that the measured shaft on the crankshaft starts to rotate around the basic rotation center line.When the central axis of the measured shaft on the crankshaft deviates from the basic rotation center line, the micrometer on the intermediate shaft will be squeezed and stretched to produce runout.The radial runout of the measured value is detected by the difference between the maximum and minimum values of the runout.

[0004] The existing automobile engine crankshaft measuring equipment has some defects: (1) Although the magnetic support can adjust and lock the direction of the probe more flexibly, it cannot assist the worker in calibrating the direction of the probe.When the extension line of the micrometer probe is not perpendicular to and intersects with the basic rotation center line, the probe will be inclined and an angle will be formed.The runout of the micrometer will cause a large error in the measured value, which will affect the measurement of the radial runout of the measured shaft, resulting in a large error in the measured value during measurement, which greatly reduces the accuracy of the measurement.

[0005] (2) The crankshaft has multiple measurement shafts in the middle part.When moving the magnetic support to measure different measurement shafts, the probe contacts the outer surface of the measurement shaft at a point.The support angle of the magnetic support does not change, but the direction of the probe to the measurement shaft changes when the support moves.The worker cannot ensure that the direction of the probe to the measurement shaft remains consistent when measuring different measurement shafts of the same crankshaft, and cannot ensure that the direction of the probe intersects perpendicularly with the rotation center line of the reference shaft, which further enlarges the measurement error based on the original measurement error. SUMMARY

[0006] In order to solve the above technical problems, the present application provides a kind of automobile engine crankshaft measuring equipment, comprising: top fixedly connected with the support of placement board, vertical sliding connection in the support of mounting bracket, by bolt fixedly installed in the inside of mounting bracket of dial gauge and be located in the locking assembly of mounting bracket both sides, mounting bracket front side is equipped with direction adjusting assembly, direction adjusting assembly inside and front side are equipped with probe rod assembly, mounting bracket rear side is equipped with clamping assembly.

[0007] Direction adjusting assembly includes fixedly connected with the front side of mounting bracket of annular frame and rotationally connected with the inside of annular frame of direction adjusting ring, elastic lock piece is equipped between direction adjusting ring and annular frame, annular slot is opened in the inside of direction adjusting ring.

[0008] Probe rod assembly includes sliding connection in the slot of connecting ring and fixedly connected with the front and rear side of connecting rod one of connecting ring, connecting rod one is about two and symmetrically arranged about connecting ring, connecting rod one and direction adjusting ring are equipped with telescopic mechanism one, and telescopic mechanism two is equipped in the front end of connecting rod one.

[0009] Clamping assembly includes connecting frame connected with the rear side of annular frame by telescopic mechanism three, fixedly connected with the rear side of mounting bracket of limiting tube and slidingly connected with the inside of anti-skid block of limiting tube, and anti-skid block is fixedly connected with connecting frame.

[0010] When two connecting rods one are arranged up and down, telescopic mechanism two and the datum axis of crankshaft are touched, telescopic mechanism two drives telescopic mechanism one, so that connecting rod one passes through annular frame and drives telescopic mechanism three, so that connecting frame drives anti-skid block to move away from support, telescopic mechanism two slides on the curved surface of crankshaft, so that mounting bracket slides outside the support, automatically determines the measuring height, and carries out the measurement of horizontal plane calibration;

[0011] Rotating direction adjusting ring, two connecting rods one are arranged left and right, the end of telescopic mechanism two and the probe needle head of dial gauge probe needle head are touched with the measuring axis of crankshaft at the same time, and measurement vertical calibration is carried out.

[0012] Further, four positioning holes for locking the direction of direction adjusting ring are evenly arranged at the upper and lower ends and the left and right sides of annular frame, the opening near the inside end of positioning hole is larger than the opening near the outside end of annular frame, and the connecting surface between the two openings forms a funnel-shaped slope, and four receiving grooves for receiving elastic lock piece are evenly arranged on the outside of direction adjusting ring.

[0013] Further, the elastic lock piece includes a positioning block slidingly connected to the receiving groove and a spring piece fixedly connected to the inside of the receiving groove, and the edge of the positioning block inserted into the positioning hole is adapted to the slope of the positioning hole, and the spring piece pushes the positioning block inserted into the positioning hole.

[0014] Further, the telescopic mechanism one comprises a pressing ring one fixedly connected to the outer side of the connecting rod one and a spring one fixedly connected to the rear side of the pressing ring one, the inner side of the steering ring is provided with a pressing groove, the pressing ring one is in sliding connection with the pressing groove, and the other end of the spring one is fixedly connected to the pressing groove.

[0015] Further, the rear side of the steering ring is provided with a receiving hole, the connecting rod one is completely retracted into the receiving hole when the telescopic mechanism one is not pressed, and the rear side of the annular frame is provided with a communicating hole, the connecting rod one penetrates into the communicating hole when the telescopic mechanism one is pressed.

[0016] Further, the telescopic mechanism two comprises a connecting pipe fixedly connected to the front end of the connecting rod one, a probe rod frame in sliding connection with the connecting pipe, a spring two fixedly connected between the connecting pipe and the probe rod frame and a ball in sleeving connection with the front end of the probe rod frame.

[0017] Further, the telescopic mechanism three comprises a compression pipe fixedly connected to the rear side of the annular frame, a connecting rod two in sliding connection with the inner side of the compression pipe and fixedly connected with a pressing ring two on the outer side, and a spring three fixedly connected between the pressing ring two and the compression pipe, the spring three provides supporting force for the pressing ring two in the direction of the annular frame, and the tail end of the connecting rod two is fixedly connected with the front side of the connecting frame.

[0018] Further, when the connecting rod one is inserted into the communicating hole under compression, the connecting rod one is in contact with the connecting rod two and pushes the connecting rod two to slide in the compression pipe.

[0019] Further, the locking assembly comprises a locking screw in rotating connection with the inner side of the mounting frame, a locking block in sliding connection with the inner side of the mounting frame, an internally threaded pipe in threaded connection with the outer side of the locking screw, and the internally threaded pipe is fixedly connected with the locking block.

[0020] The present application has the following advantages: (1) The present application is provided with a structure for calibration on the mounting frame, which can be calibrated according to the reference shaft before measurement, when the two connecting rods one are arranged above and below, the probe rod assembly touches the reference shaft, the probe rod assembly triggers the clamping assembly to make the anti-skid block away from the support, so that the mounting frame is unlocked to slide, since the two bottom-touching of the probe rod assembly are on the curved surface of the reference shaft, the height of the probe rod assembly is calibrated automatically, and the mounting frame is automatically calibrated, when the probe rod assembly is away from the reference shaft, the clamping assembly lacks the trigger of the probe rod assembly, the mounting frame and the support are locked by the anti-skid block, at this time, the extension line of the probe intersects with the rotation center line of the foundation, and the two lines are in the same horizontal plane, which reduces the measurement error and improves the measurement accuracy of the dial gauge.

[0021] (2) The application is provided with a direction adjusting assembly, two connecting rods can be arranged horizontally, when the probe rod assembly is abutted on the measuring shaft, the extension line of the probe is perpendicular to the rotation center line of the base, the perpendicularity of the two lines is realized, the perpendicularity and intersection of the two lines are finally realized, the measurement accuracy of the dial gauge on the radial runout is greatly improved, and when different measuring shafts are measured, the horizontal height of the probe is unchanged, the extension line of the probe is always perpendicular to and intersects with the rotation center line of the base through the auxiliary positioning of the probe rod assembly, the continuity of measurement is improved, and the error is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a three-dimensional schematic view of a kind of automobile engine crankshaft measuring equipment of the application Figure 1 .

[0023] Figure 2 is a three-dimensional schematic view of a kind of automobile engine crankshaft measuring equipment of the application Figure 2 .

[0024] Figure 3 is the partial structure explosion schematic view of the direction adjusting assembly of the application.

[0025] Figure 4 is the sectional view schematic view of the partial structure of the direction adjusting assembly in the application.

[0026] Figure 5 is the sectional view schematic view of the partial structure of the probe rod assembly in the application.

[0027] Figure 6 is the sectional view schematic view of the direction adjusting ring of the application.

[0028] Figure 7 is the enlarged schematic view of A area in the application Figure 4 .

[0029] Figure 8 is the enlarged schematic view of B area in the application Figure 5 .

[0030] Figure 9 is a top view sectional view schematic view of a kind of automobile engine crankshaft measuring equipment of the application.

[0031] Figure 10 is the coincidence calibration schematic view of the extension line of the dial gauge and the rotation center line of reference shaft in the same horizontal plane.

[0032] Figure 11 is the perpendicular calibration schematic view of the extension line of the dial gauge and the rotation center line of reference shaft.

[0033] Indicated in the figure: 1, placement plate; 2, support column; 3, mounting frame; 4, micrometer; 41, bolt; 5, direction adjusting assembly; 51, ring-shaped frame; 52, direction adjusting ring; 53, elastic locking piece; 531, positioning hole; 532, storage groove; 533, positioning block; 534, spring piece; 6, probe rod assembly; 61, connecting ring; 62, sliding groove; 63, connecting rod one; 64, telescopic mechanism one; 641, extrusion groove; 642, extrusion ring one; 643, spring one; 644, storage hole; 645, communication hole; 65, telescopic mechanism two; 651, connecting pipe; 652, probe rod frame; 653, spring two; 654, ball; 7, clamping assembly; 71, connecting frame; 72, telescopic mechanism three; 721, compression pipe; 722, connecting rod two; 723, extrusion ring two; 724, spring three; 73, limiting pipe; 74, anti-skid block; 8, locking assembly; 81, locking screw; 82, locking block; 83, internally threaded pipe; 9, placement frame; 10, crankshaft; 101, reference shaft; 102, measurement shaft. DETAILED DESCRIPTION

[0034] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that these implementations are discussed in order to provide a better understanding of the subject matter described herein. Changes to the function and arrangement of elements discussed can be made without departing from the scope of the subject matter presented in this disclosure. Various examples can omit, substitute, or add various procedures or components as appropriate. Also, features described with respect to some examples can be combined in other examples.

[0035] Referring to Figure 1 , Figure 4 and Figure 7 , in this embodiment, a crankshaft measurement device for an automobile engine is provided, comprising: a placement plate 1 having a support column 2 fixedly connected to a top end, a mounting frame 3 slidably connected to the support column 2, a micrometer 4 fixedly installed inside the mounting frame 3 through a bolt 41, and a locking assembly 8 provided on both sides of the mounting frame 3, wherein a direction adjusting assembly 5 is provided on the front side of the mounting frame 3, a probe rod assembly 6 is provided inside and on the front side of the direction adjusting assembly 5, and a clamping assembly 7 is provided on the rear side of the mounting frame 3.

[0036] The direction adjusting assembly 5 comprises a ring-shaped frame 51 fixedly connected to the front side of the mounting frame 3 and a direction adjusting ring 52 rotatably connected to the inside of the ring-shaped frame 51, and an elastic locking piece 53 is provided between the direction adjusting ring 52 and the ring-shaped frame 51.

[0037] The upper and lower ends and the left and right sides of the annular frame 51 are uniformly provided with four positioning holes 531, the opening of the positioning hole 531 close to the inner side of the annular frame 51 is larger than the opening close to the outer side of the annular frame 51, the connecting surface between the two openings forms a funnel-shaped slope, the outer side of the direction adjusting ring 52 is uniformly provided with four receiving grooves 532, the elastic locking piece 53 includes a positioning block 533 slidingly connected to the receiving groove 532 and a spring sheet 534 fixedly connected to the inner side of the receiving groove 532, the end edge of the positioning block 533 inserted into the positioning hole 531 is adapted to the slope of the positioning hole 531, and the spring sheet 534 pushes and supports the positioning block 533 inserted into the positioning hole 531.

[0038] As an embodiment of the present application, the direction adjusting ring 52 is held and rotated with force, due to the adaptation of the slope of the positioning hole 531 and the slope of the positioning block 533, the positioning block 533 is gradually shrunk into the receiving groove 532 under the extrusion of the slope of the positioning hole 531, at this time, the direction adjusting ring 52 can continue to rotate, when rotating to a lower positioning hole 531, the spring sheet 534 pushes the positioning block 533 to pop out, so that the positioning block 533 is inserted into the positioning hole 531, the locking of the direction adjusting ring 52 is completed, and the direction adjusting ring 52 is adjusted synchronously, so that the detection mode of the detection device can be adjusted.

[0039] Referring to Figure 5 , Figure 6 and Figure 8 , the inner side of the direction adjusting ring 52 is provided with an annular sliding groove 62, the probe rod assembly 6 includes a connecting ring 61 slidingly connected to the sliding groove 62 and a connecting rod one 63 fixedly connected to the front side and the rear side of the connecting ring 61, the connecting rod one 63 is symmetrically provided about the connecting ring 61 and is two in number, a telescopic mechanism one 64 is arranged between the connecting rod one 63 and the direction adjusting ring 52, and a telescopic mechanism two 65 is arranged at the front end of the connecting rod one 63.

[0040] The telescopic mechanism one 64 includes a pressing ring one 642 fixedly connected to the outer side of the connecting rod one 63 and a spring one 643 fixedly connected to the rear side of the pressing ring one 642, the inner side of the direction adjusting ring 52 is provided with a pressing groove 641, the pressing ring one 642 is slidingly connected to the pressing groove 641, the other end of the spring one 643 is fixedly connected to the pressing groove 641, the rear side of the direction adjusting ring 52 is provided with a receiving hole 644, when the telescopic mechanism one 64 is not extruded, the connecting rod one 63 is completely shrunk into the receiving hole 644, the rear side of the annular frame 51 is provided with a communicating hole 645, and when the telescopic mechanism one 64 is extruded, the connecting rod one 63 penetrates into the communicating hole 645.

[0041] The telescopic mechanism two 65 includes a connecting pipe 651 fixedly connected to the front end of the connecting rod one 63, a probe rod holder 652 slidingly connected to the connecting pipe 651, a spring two 653 fixedly connected between the connecting pipe 651 and the probe rod holder 652, and a ball 654 sleeved to the front end of the probe rod holder 652. The contact points of the probe end head point of the micrometer 4 and the two balls 654 with the measuring shaft 102 are on a straight line.

[0042] As an embodiment of the present application, the ball 654 abuts against the reference shaft 101 to perform horizontal plane calibration, and the reaction force of the abutment can extrude the probe rod holder 652 to compress the spring two 653 in the connecting pipe 651. At this time, the connecting rod one 63 is aligned with the communication hole 645, and the connecting rod one 63 is extruded into the communication hole 645 by the extrusion ring one 642 to compress the spring one 643.

[0043] As an embodiment of the present application, the ball 654 abuts against the measuring shaft 102 to perform vertical calibration and measurement. At this time, the measuring shaft 102 has a radial runout amount, and the measuring shaft 102 compresses the probe of the micrometer 4 and the ball 654. At this time, the connecting rod one 63 is not in communication with the communication hole 645, and the telescopic mechanism one 64 is not telescopic. Only the probe rod holder 652 slides in the connecting pipe 651 to compress the spring two 653 to perform auxiliary measurement.

[0044] Referring to Figure 1 , Figure 5 and Figure 9 , the locking assembly 8 includes a locking screw 81 rotatably connected to the inner side of the mounting frame 3, a locking block 82 slidingly connected to the inner side of the mounting frame 3, an internally threaded pipe 83 threadedly connected to the outer side of the locking screw 81, and the internally threaded pipe 83 fixedly connected with the locking block 82.

[0045] The clamping assembly 7 includes a connecting frame 71 connected to the rear side of the annular frame 51 through the telescopic mechanism three 72, a limiting pipe 73 fixedly connected to the rear side of the mounting frame 3, and an anti-skid block 74 slidingly connected to the inner side of the limiting pipe 73, and the anti-skid block 74 fixedly connected with the connecting frame 71.

[0046] The telescopic mechanism three 72 includes a compression pipe 721 fixedly connected to the rear side of the annular frame 51, a connecting rod two 722 slidingly connected to the inner side of the compression pipe 721 and having an extrusion ring two 723 fixedly connected to the outer side thereof, and a spring three 724 fixedly connected between the extrusion ring two 723 and the compression pipe 721. The spring three 724 provides a support force for the extrusion ring two 723 in the direction of the annular frame 51, and the tail end of the connecting rod two 722 is fixedly connected to the front side of the connecting frame 71. When the connecting rod one 63 is inserted into the communication hole 645 under compression, the connecting rod one 63 contacts the connecting rod two 722 and pushes the connecting rod two 722 to slide in the compression pipe 721.

[0047] As an embodiment of the present application, the ball 654 is in contact with the reference shaft 101 to calibrate the horizontal plane, at this time, the locking screw 81 is rotated in advance, the locking block 82 limited by the mounting frame 3 is pulled away from the support, so that the mounting frame 3 is clamped and fixed only by the anti-skid block 74, the connecting rod one 63 is inserted into the communication hole 645, the connecting rod two 722 is extruded, so that the connecting frame 71 drives the anti-skid block 74 away from the support, at this time, the mounting frame 3 can slide on the support, because the outer surface of the reference shaft 101 is arc-shaped, the two balls 654 are in contact with the outside of the reference shaft 101, so that the horizontal plane where the probe position of the dial gauge 4 is located coincides with the horizontal plane where the basic rotation center line of the reference shaft 101 is located, which will make the mounting frame 3 stop after sliding to a certain height, gradually hold the placement plate 1, so that the ball 654 is away from the reference shaft 101, the spring one 643 and the spring two 653 are rebounded, so that the connecting rod one 63 is retracted into the storage hole 644, the communication hole 645 is pulled away, at this time, the spring three 724 is rebounded, the extrusion ring two 723 is pushed, so that the connecting rod two 722 drives the connecting frame 71 and the anti-skid block 74 to move forward, the anti-skid block 74 is attached to the support only, so that the mounting frame 3 can be preliminarily locked, then the locking screw 81 is rotated, so that the locking block 82 clamps the support column 2, and the height locking of the mounting frame 3 is completed.

[0048] Referring to Figures 1 to 11 In specific use, first, the horizontal plane calibration of the probe is carried out according to the reference shaft 101.

[0049] The adjusting ring 52 is adjusted, so that the plane between the connecting rod one 63 is perpendicular to the placement plate 1, at this time, the two connecting rod one 63 are arranged up and down, the connecting rod one 63 is butted with the communication hole 645 of the ring-shaped frame 51, the locking screw 81 is rotated, so that the locking block 82 is away from the support column 2, the placement plate 1 is placed on the workbench, the crankshaft 10 is installed in the placement frame 9 at the top end of the workbench, the ball 654 in the telescopic mechanism two 65 is in contact with the reference shaft 101 of the crankshaft 10, the probe rod frame 652 in the telescopic mechanism two 65 pushes the connecting rod one 63 in the telescopic mechanism one 64 through the compression spring two 653 to compress the compression spring one 643, the connecting rod one 63 is inserted into the communication hole 645, the connecting rod two 722 is extruded, so that the connecting frame 71 drives the anti-skid block 74 away from the support column 2, the mounting frame 3 can be automatically slid to the height of the rotation center line of the reference shaft 101. Then, the placement plate 1 is translated, so that the ball 654 is away from the reference shaft 101, under the support of the spring one 643 and the spring two 653, the mounting frame 3 always maintains at the calibrated height, when the spring one 643 and the spring two 653 are completely reset, the spring three 724 is also reset synchronously, so that the anti-skid block 74 is extruded on the support column 2, preventing the mounting frame 3 from sliding, at this time, the locking screw 81 is rotated, so that the mounting frame 3 is completely locked.

[0050] After the horizontal plane calibration, the micrometer 4 does not need to be installed, and since the diameter of the reference shaft 101 is different, the reference shaft 101 is prevented from protruding and pressing the length of the probe beyond the measuring length of the micrometer 4 during the horizontal plane calibration, and the micrometer 4 is prevented from being damaged.

[0051] Then, the vertical calibration and the radial runout measurement can be performed.

[0052] The rotation direction ring 52 is rotated so that the plane between the connecting rods one 63 is parallel to the placement plate 1, at this time, the two connecting rods one 63 are arranged left and right, the connecting rods one 63 are not docked with the communication hole 645, and the telescopic mechanism one 64 is disconnected from the telescopic mechanism three 72. The micrometer 4 is installed, at this time, the probe end point of the micrometer 4 and the contact points of the two ball bearings 654 and the measuring shaft 102 are on a straight line, only the two ball bearings 654 and the probe of the micrometer 4 need to be pressed on the measuring shaft 102 at the same time, the vertical calibration of the probe can be completed, in order to prevent the contact point being the position of the maximum radial runout of the measuring shaft 102, the placement plate 1 needs to be translated and pushed so that the probe is pressed, the pointer in the micrometer 4 points to a numerical value, at this time, the reference shaft 101 is rotated so that the measuring shaft 102 rotates around the basic rotation center line, according to the difference between the maximum value and the minimum value on the micrometer 4, the radial runout of the measuring shaft 102 can be measured. Since the difference is calculated, the initial value of the micrometer 4 is different when measuring different measuring shafts 102, which will not have any effect on the measured difference.

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] In addition, the terms "first", "second", "one", "two" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0055] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0056] The embodiments of the specific implementation are the preferred embodiments of the application, not to limit the protection scope of the application, therefore; all equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. An automobile engine crankshaft measuring device, comprising: The top of the mounting frame is fixedly connected to a placement plate of a pillar, a mounting frame slidably connected to the pillar, a dial indicator fixed to the inner side of the mounting frame by bolts, and a locking assembly provided on both sides of the mounting frame. The mounting frame is characterized in that: a direction adjustment assembly is provided on the front side of the mounting frame, a probe rod assembly is provided inside and on the front side of the direction adjustment assembly, and a clamping assembly is provided on the rear side of the mounting frame; The direction adjustment assembly includes an annular frame fixedly connected to the front side of the mounting frame and a direction adjustment ring rotatably connected to the inner side of the annular frame. An elastic locking mechanism is provided between the direction adjustment ring and the annular frame, and an annular sliding groove is provided on the inner side of the direction adjustment ring. The probe rod assembly includes a connecting ring slidably connected to the slide groove and a connecting rod 1 fixedly connected to the front and rear sides of the connecting ring. There are two connecting rods in total and they are symmetrically arranged about the connecting ring. A telescopic mechanism 1 is provided between the connecting rod 1 and the adjustment ring. A telescopic mechanism 2 is provided at the front end of the connecting rod 1. The clamping assembly includes a connecting frame connected to the rear side of the annular frame through a telescopic mechanism, a limiting tube fixedly connected to the rear side of the mounting frame, and an anti-sliding block slidably connected to the inner side of the limiting tube. The anti-sliding block is fixedly connected to the connecting frame.

2. The automobile engine crankshaft measuring device according to claim 1, characterized in that: When the plane between the connecting rods is vertically placed on the plate, the telescopic mechanism 2 contacts the reference axis of the crankshaft, the telescopic mechanism 2 extends and contracts and pushes the telescopic mechanism 1 to extend and contract, and then pushes the telescopic mechanism 3 to extend and contract through the annular frame. The connecting frame drives the anti-sliding block away from the pillar, and the mounting frame slides outside the pillar to perform horizontal plane calibration. When the adjustment ring is rotated and the plane between the connecting rods 1 is parallel to the placement plate, the telescopic mechanism 1 and the telescopic mechanism 3 are disconnected, and the telescopic mechanism 2 touches the measuring axis of the crankshaft to perform vertical calibration.

3. The automobile engine crankshaft measuring device according to claim 1, characterized in that: Four positioning holes are evenly opened on the upper and lower ends and left and right sides of the ring frame. The opening of the positioning hole close to the inner end of the ring frame is larger than the opening close to the outer end of the ring frame. The connecting surface between the openings at both ends forms a funnel-shaped inclined surface, and four storage grooves are evenly opened on the outside of the adjustment ring.

4. The automobile engine crankshaft measuring device according to claim 2, characterized in that: The elastic locking mechanism includes a positioning block slidably connected to the receiving slot and a spring sheet fixedly connected to the inner side of the receiving slot. The edge of one end of the positioning block inserted into the positioning hole is an inclined surface adapted to the positioning hole, and the spring sheet pushes the support positioning block to insert into the positioning hole.

5. The automobile engine crankshaft measuring device according to claim 1, characterized in that: The telescopic mechanism includes an extrusion ring fixedly connected to the outside of the connecting rod and a spring fixedly connected to the rear side of the extrusion ring. An extrusion groove is opened on the inner side of the adjustment ring. The extrusion ring is slidably connected to the extrusion groove, and the other end of the spring is fixedly connected to the extrusion groove.

6. The automobile engine crankshaft measuring device according to claim 4, characterized in that: A receiving hole is opened on the rear side of the adjusting ring. When the telescopic mechanism is not squeezed, the connecting rod is completely retracted into the receiving hole. A connecting hole is opened on the rear side of the annular frame. When the telescopic mechanism is squeezed, the connecting rod penetrates into the connecting hole.

7. The automobile engine crankshaft measuring device according to claim 4, characterized in that: The second telescopic mechanism includes a connecting pipe fixedly connected to the front end of the connecting rod, a probe frame slidably connected to the connecting pipe, a second spring fixedly connected between the connecting pipe and the probe frame, and a ball sleeved on the front end of the probe frame.

8. The automobile engine crankshaft measuring device according to claim 5, characterized in that: The telescopic mechanism three includes a compression tube fixedly connected to the rear side of the annular frame, a connecting rod two slidably connected to the inner side of the compression tube and fixedly connected to the extrusion ring two on the outer side, and a spring three fixedly connected between the extrusion ring two and the compression tube. The spring three provides support force for the extrusion ring two in the direction of the annular frame, and the tail end of the connecting rod two is fixedly connected to the front side of the connecting frame.

9. The automobile engine crankshaft measuring device according to claim 7, characterized in that: When the connecting rod 1 is compressed and inserted into the communicating hole, the connecting rod 1 contacts the connecting rod 2 and pushes the connecting rod 2 to slide in the compression tube.

10. The automobile engine crankshaft measuring device according to claim 1, characterized in that: The locking assembly includes a locking screw rotatably connected to the inner side of the mounting frame, a locking block slidably connected to the inner side of the mounting frame, an internal threaded tube threadedly connected to the outer side of the locking screw, and the internal threaded tube is fixedly connected to the locking block.

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