CN209764417U - General engine crankshaft surface spiral texture detection device - Google Patents

Abstract

The utility model provides a general gasoline engine crankshaft surface spiral texture detection device, which comprises a bottom plate, wherein a first thimble device and a second thimble device which are bilaterally symmetrical are fixedly arranged on the bottom plate, the first thimble device comprises a motor and a first thimble, and the first thimble is connected with an output shaft of the motor; the second ejector pin device comprises an air cylinder and a second ejector pin, and the second ejector pin is connected with an output shaft of the air cylinder; the spiral texture detection mechanism comprises a counterweight and a flexible cable, and the counterweight is suspended on an oil seal position on the surface of the end part of the crankshaft journal through the flexible cable. The utility model discloses on the weight is hung and is arranged in bent axle oil blanket position as required, through continuous rotation 1 minute, detection weight is according to the axial position of walking of work piece to the spiral and the helical angle of judging work piece excircle surface spiral texture, it is normal to confirm bent axle oil blanket position soon, and the best helical angle size in further definite oil blanket position avoids extravagant lubricating oil, reduces bent axle rotation inertia.

Description

General engine crankshaft surface spiral texture detection device

Technical Field

The utility model relates to bent axle detection device, in particular to general engine bent axle surface spiral texture detection device.

Background

The crankshaft arranged in the automobile engine is the most important part in the engine, and the crankshaft bears the force transmitted by the connecting rod, converts the force into torque, outputs the torque through the crankshaft and drives other accessories on the engine to work. The crankshaft is subjected to the combined action of centrifugal force of the rotating mass, gas inertia force of periodic variation and reciprocating inertia force, so that the crankshaft is subjected to the action of bending and twisting load. In order to reduce the mass of the crankshaft and the centrifugal force generated during movement, the crankshaft journal is usually made to be hollow, two ends of the crankshaft journal are respectively a flywheel end and an output end, a spiral thread-shaped oil seal position is arranged on the surface of each end part to lubricate the surface of the journal, the rotating direction of the oil seal position determines the introduction or extraction of engine oil, and the oil seal position on the crankshaft continuously rotates in a spiral way to return oil, so that the oil seal effect is achieved; the helical angle of the oil seal position determines the oil return speed and further determines the lubricating effect. Therefore, the rotating direction and the helical angle of the oil seal position are critical, the rotating direction is not correct, and lubricating oil can be thrown out of the crankshaft to generate oil leakage; the too large or too small helical angle can affect the oil sealing effect, further cause the waste of lubricating oil and even affect the service life of the engine.

In practice, usually, a master is used for detecting the rotation direction of the oil seal position through visual inspection for many years, the gap distance between the threads of the spiral thread-shaped oil seal position is small, errors are prone to occurring by naked eyes, and rotation direction misjudgment is caused. For example, patent No. CN203116762U discloses a crankshaft oil seal position spiral thread detection device, which comprises a bottom plate, a transmission mechanism, a fixing mechanism and a detection mechanism, wherein the transmission mechanism is arranged at one end of the bottom plate and comprises a frame, a motor and a coupler; the fixing mechanism is arranged at the other end of the bottom plate and comprises a base, a bracket, a pressing plate, a pressing block, a V-shaped block and a locking block; detection mechanism includes weight and flexible thread, the weight hangs the oil blanket position spiracle section of waiting to detect crankshaft rod portion through flexible thread, the beneficial technological effect of the crankshaft oil blanket position spiracle detection device that this patent provided is quick, the rotation of accurate detection crankshaft rod portion oil seal position spiracle is to, guarantee sealed effect, guarantee the normal operating of engine, and when detecting crankshaft oil seal position spiracle, what the bent axle was fixed to be adopted is clamp plate and briquetting, though simple, it is swift, but the bent axle appearance is anomalous structure, when detecting, the bent axle rotates and can arouse great inertia, it is too big to lead to oil seal position skew, thereby produce the too big problem of crankshaft rod portion oil seal position spiracle detection deviation.

Therefore, the prior art for detecting the spiral texture on the surface of the crankshaft has the defects that the rotation direction of the oil seal position is easy to cause misjudgment, the size of the spiral angle of the oil seal position cannot be accurately calculated, the optimal oil return effect cannot be achieved, and the oil seal position is detected to deviate too much due to the rotation of the crankshaft.

SUMMERY OF THE UTILITY MODEL

The prior art for solving and detecting bent axle surface spiral texture has the oil blanket position to revolve to easily causing the erroneous judgement, can not accurately calculate out the helical angle size of oil blanket position and can not reach the oil return optimum effect and crankshaft rotation and lead to the skew too big shortcoming of oil blanket position detection, the utility model provides a general machine bent axle surface spiral texture detection device.

The utility model provides a technical scheme is: a spiral texture detection device for the surface of a general engine crankshaft comprises a bottom plate, wherein a first thimble device and a second thimble device which are bilaterally symmetrical are fixedly mounted on the bottom plate, the first thimble device comprises a first support and a motor, the motor is fixedly mounted on the left side surface of the first support, a first thimble mounting hole communicated with an output shaft of the motor is formed in the first support, a bearing is arranged in the first thimble mounting hole, a first thimble is sleeved on the bearing, and the first thimble is connected with the output shaft of the motor; the second thimble device comprises a second support and a cylinder, the cylinder is fixedly arranged on the right side surface of the second support, a second thimble mounting hole communicated with the output shaft of the cylinder is arranged on the second support, the second thimble mounting hole corresponds to the first thimble mounting hole left and right, a second thimble is movably arranged in the second thimble mounting hole, and the second thimble is connected with the output shaft of the cylinder; the end face center hole of the flywheel end of the crankshaft journal is in matched contact with the first ejector pin, and the end face center hole of the output end is in matched contact with the second ejector pin; the spiral texture detection mechanism comprises a counterweight and a flexible cable, and the counterweight is suspended on an oil seal position on the surface of the end part of the crankshaft journal through the flexible cable.

The utility model adopts a double-tip structure to utilize the weight balance weight to simulate the thread stroke track of an oil seal to detect the spiral direction and the spiral angle of the spiral texture, in particular to a spiral texture detection device for the surface of a general-purpose engine crankshaft, which comprises a bottom plate, wherein a first thimble device and a second thimble device which are bilaterally symmetrical are fixedly arranged on the bottom plate by using bolt components and the like, the first thimble device is a motor driving device, the motor drives the crankshaft to rotate so as to form the thread oil seal stroke, the second thimble device is a cylinder type thimble limiting device, and the two ends of the crankshaft are clamped by using the force applied by a cylinder; the first thimble device comprises a first support and a motor, the motor is fixedly arranged on the left side surface of the first support through bolts and the like, an output shaft of the motor provides kinetic energy for the first thimble, so that a first thimble mounting hole communicated with the output shaft of the motor is formed in the first support, bearings are arranged in the first thimble mounting hole in order to enable the crankshaft to rotate, the bearings are a pair and are respectively arranged on the left side and the right side of the first thimble mounting hole, the two bearings are sleeved with first thimbles, the first thimble is connected with the output shaft of the motor, and the motor is started to drive the output shaft to rotate so as to drive the first thimble to rotate on the bearings; the second thimble device comprises a second support and a cylinder, the second thimble device moves by arranging a movable T-shaped groove mounting and connecting structure in a long straight strip shape on a bottom plate on the right side, the second support is fixed on the T-shaped groove by a T-shaped bolt assembly, the position of the second support on the T-shaped groove is adjusted according to the integral length of the crankshaft, the cylinder is selected from a model with a cylinder diameter of 50mm, and is fixedly arranged on the right side surface of the second support by bolts and the like, the output shaft of the cylinder provides power for the second thimble, so a second thimble mounting hole communicated with the output shaft of the cylinder is arranged on the second support, the flywheel end and the output end of a crankshaft journal are on the same straight line, therefore, the second thimble mounting hole corresponds to the left side and the right side of the first thimble mounting hole, the movable second thimble is arranged in the second thimble mounting hole, and the second thimble corresponds to the left side and the right side of the first thimble, the tops of the first thimble and the second thimble are ensured to be on the same horizontal line, the second thimble is connected with an output shaft of the cylinder, the cylinder is started, the output shaft drives the second thimble to tightly push the crankshaft, the cylinder is closed, and the crankshaft is loosened; during detection, the crankshaft is placed between the first ejector pin and the second ejector pin, specifically, an end face center hole of a flywheel end of a crankshaft journal is in matched contact with the first ejector pin, an end face center hole of an output end is in matched contact with the second ejector pin, the first ejector pin drives the crankshaft to rotate, and the second ejector pin tightly pushes or loosens the crankshaft; still include spiral texture detection mechanism, the surface of bent axle journal flywheel end and output all has the screw thread oil blanket, consequently all need detect soon to and the angle, so this spiral texture detection mechanism is equipped with two places, detect the screw thread oil blanket position of two places respectively, spiral texture detection mechanism includes counter weight and flexible clue, the counter weight hangs on bent axle journal tip oil blanket position on the surface through flexible clue, the counter weight that this department adopted is the weight, weight is 30g, flexible clue is the diameter and is 0.25 mm's cotton thread, hang the weight on the oil blanket position on bent axle journal tip left and right sides flywheel end and output surface with the cotton thread.

When the detection is started, whether a power indicator lamp of the equipment is turned on or not is detected, a power supply is connected, then the proper position of the second support on the T-shaped groove is adjusted according to the integral length of the crankshaft, and then the second support is fixed by a T-shaped screw assembly; daubing red lead on the cotton thread, respectively suspending the cotton thread on the oil seal positions on the surfaces of the left flywheel end and the right flywheel end and the output end of the end part of the crankshaft journal, and visually observing the contained angle between the cotton thread and the oil seal position of the crankshaft to be 220-240 degrees; after the motor is started, the rotating speed is kept at 60r/min, the moving direction of the cotton threads of the oil seals at the two ends is observed, the rotating direction is judged, if the cotton threads move or do not move towards the crank direction, the spiral angle is qualified, the size of the spiral angle is calculated according to the stroke track of the cotton threads, and the optimal spiral angle value is determined by contrasting data.

The utility model has the beneficial technical effects that: the utility model adopts a double-tip structure, one end is connected with a stepping motor to realize the forward and reverse rotation at a preset speed of 60r/min, the other end adopts a cylinder to drive the tip structure, weights are hung on the crankshaft oil seal position according to requirements, by continuously rotating for 1 minute, the detection weight moves along the axial direction of the workpiece to judge the rotating direction and the helical angle of the helical texture on the surface of the excircle of the workpiece, determine the rotating direction of the oil seal position of the crankshaft to be normal, further determine the size of the optimal helical angle of the oil seal position, avoid lubricating oil waste, fix and fix the two ends of the crankshaft by adopting a double-thimble structure, and then adopt cylinder reinforcement centre gripping, keep the bent axle rigidity, reduce rotation inertia, improve detection performance, solved the prior art that detects bent axle surface spiral texture and exist the oil blanket position rotation and easily cause the erroneous judgement, can not accurately calculate the helical angle size of oil blanket position and can not reach the oil return best effect and the bent axle rotates and leads to the fact problem that the oil blanket position detects and deviates too greatly.

drawings

FIG. 1 is a diagram of the effect of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a right side view of FIG. 1;

FIG. 5 is an explosion effect diagram of the present invention;

FIG. 6 is a schematic structural view of a first support;

FIG. 7 is a schematic structural view of a second support;

In the figure: 1. the motor, 2, first support, 20, first thimble mounting hole, 21, first mounting panel, 3, bearing, 4, first thimble, 5, flexible clue, 6, flywheel end, 7, output, 8, second thimble, 9, second support, 90, second mounting panel, 10, second thimble mounting hole, 11, cylinder, 12, installation guide way, 13, T type bolt assembly, 14, counter weight, 15, bottom plate.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, the relative terms "upper", "lower", "left", "right", "inner", "outer" and other position indication positions are only based on the position shown in the drawings to simplify the description of the present invention, but not the position and structure that the components must have, and thus, the limitation of the present invention cannot be understood.

as shown in fig. 1, 2, 3, 4, and 5, a surface spiral texture detection device for a general-purpose engine crankshaft comprises a bottom plate 15, wherein a first thimble device and a second thimble device which are bilaterally symmetrical are fixedly mounted on the bottom plate 15, the first thimble device comprises a first support 2 and a motor 1, the motor 1 is fixedly mounted on the left side surface of the first support 2, a first thimble mounting hole 20 communicated with an output shaft of the motor 1 is formed in the first support 2, a bearing 3 is arranged in the first thimble mounting hole 20, a first thimble 4 is sleeved on the bearing 3, and the first thimble 4 is connected with the output shaft of the motor 1; the second thimble device comprises a second support 9 and a cylinder 11, the cylinder 11 is fixedly arranged on the right side surface of the second support 9, a second thimble mounting hole 10 communicated with an output shaft of the cylinder 11 is arranged on the second support 9, the second thimble mounting hole 10 corresponds to the first thimble mounting hole 20 in the left and right directions, a second thimble 8 is movably arranged in the second thimble mounting hole 10, and the second thimble 8 is connected with the output shaft of the cylinder 11; the end surface center hole of the flywheel end 6 of the crankshaft journal is in fit contact with the first ejector pin 4, and the end surface center hole of the output end 7 is in fit contact with the second ejector pin 8; the crankshaft oil seal device further comprises a spiral texture detection mechanism, wherein the spiral texture detection mechanism comprises a balance weight 14 and a flexible cable 5, and the balance weight 14 is suspended on an oil seal position on the end surface of the crankshaft journal through the flexible cable 5.

The utility model adopts a double-tip structure to utilize the screw thread stroke track of the weight counterweight simulation oil seal to detect the spiral direction and the spiral angle of the spiral texture, in particular to a spiral texture detection device for the surface of a general-purpose engine crankshaft, which comprises a bottom plate 15, wherein a first thimble device and a second thimble device which are bilaterally symmetrical are fixedly arranged on the bottom plate 15 by bolt components and the like, the first thimble device is a motor driving device, a motor 1 is utilized to drive the crankshaft to rotate so as to form the stroke of the thread oil seal, the second thimble device is a cylinder type thimble limiting device, and the two ends of the crankshaft are clamped by utilizing the force application of a cylinder 11; the first thimble device comprises a first support 2 and a motor 1, the motor 1 is fixedly arranged on the left side surface of the first support 2 by bolts and the like, an output shaft of the motor 1 provides kinetic energy for the first thimble 4, so a first thimble mounting hole 20 communicated with the output shaft of the motor 1 is formed in the first support 2, in order to enable the crankshaft to rotate, bearings 3 are arranged in the first thimble mounting hole 20, the bearings 3 are a pair and are respectively arranged on the left side and the right side of the first thimble mounting hole 20, the first thimble 4 is sleeved on the two bearings 3, the first thimble 4 is connected with the output shaft of the motor 1, the motor 1 is started to drive the output shaft to rotate so as to drive the first thimble 4 to rotate on the bearings 3; the second thimble device comprises a second support 9 and a cylinder 11, the utility model adopts the movable T-shaped groove connecting structure with a long straight strip shape arranged on a bottom plate 15 on the right side to realize the movement of the second thimble device, the second support 9 is fixed on the T-shaped groove by a T-shaped bolt component 13, the position of the second support 9 on the T-shaped groove is adjusted according to the integral length of the crankshaft, the cylinder 11 is selected from a model with a cylinder diameter of 50mm, and is fixedly arranged on the right side surface of the second support 9 by bolts and the like, the output shaft of the cylinder 11 provides power for the second thimble 8, so the second support 9 is provided with a second thimble mounting hole 10 communicated with the output shaft of the cylinder 11, the flywheel end 6 and the output end 7 of the crankshaft journal are on the same straight line, therefore, the second thimble mounting hole 10 corresponds to the left and the right of the first thimble mounting hole 20, a movable second thimble 8 is arranged in the second thimble mounting hole 10, the second thimble 8 corresponds to the first thimble 4 left and right similarly, guarantee the centre of the two is on the same horizontal line, the second thimble 8 is connected with output shaft of the air cylinder 11, the air cylinder 11 starts, the output shaft drives the second thimble 8 to jack up the crankshaft, the air cylinder closes, unclamp the crankshaft; during detection, the crankshaft is placed between the first ejector pin 4 and the second ejector pin 8, specifically, an end face center hole of a flywheel end 6 of a crankshaft journal is in matched contact with the first ejector pin 4, an end face center hole of an output end 7 is in matched contact with the second ejector pin 8, the first ejector pin 4 drives the crankshaft to rotate, and the second ejector pin 8 tightly pushes or loosens the crankshaft; still include spiral texture detection mechanism, the surface of bent axle journal flywheel end 6 and output 7 all has the screw thread oil blanket, consequently all need detect soon to and angle, so this spiral texture detection mechanism of department is equipped with two, detect the screw thread oil blanket position of two respectively, spiral texture detection mechanism includes counter weight 14 and flexible clue 5, counter weight 14 hangs on the oil blanket position on bent axle journal tip surface through flexible clue 5, the counter weight 14 that this department adopted is the weight, weight is 30g, flexible clue 5 is the cotton thread that the diameter is 0.25mm, hang the weight on the oil blanket position on bent axle journal tip left and right sides flywheel end 6 and output 7 surface with the cotton thread.

When the detection is started, whether a power indicator lamp of the equipment is turned on or not is detected, a power supply is connected, then the proper position of the second support 9 on the T-shaped groove is adjusted according to the integral length of the crankshaft, and then the second support is fixed by a T-shaped screw assembly; daubing red lead on the cotton thread, respectively suspending the cotton thread on the oil seal positions on the surfaces of the flywheel end 6 and the output end 7 on the left side and the right side of the end part of the crankshaft journal, and visually observing the contained angle between the cotton thread and the oil seal position of the crankshaft to be 220-240 degrees; after the motor 1 is started, the rotating speed is kept at 60r/min, the moving direction of the cotton threads of the oil seals at the two ends is observed, the rotating direction is judged, the cotton threads are qualified if the two ends move towards the crank direction or are not moved, the size of the spiral angle is calculated according to the stroke track of the cotton threads, and the optimal spiral angle value is determined by contrasting data.

Further, the bearing 3 is an outer spherical bearing. In order to better match and sleeve the first thimble, the bearing 3 is an outer spherical bearing, and the model is CS 200.

further, the bearings 3 are arranged in the first thimble mounting hole 20 in a pair in number and spaced left and right. In order to ensure uniform rotation, spherical bearings are sleeved at the left end and the right end of the first thimble 4, bearing mounting steps are arranged at the left end and the right end of the first thimble mounting hole 20, and the two spherical bearings are respectively arranged on the bearing mounting steps at the left side and the right side of the first thimble mounting hole 20.

furthermore, the first ejector pin device also comprises a fixing piece which is a bolt; the bottom integrated into one piece of first support 2 has the first mounting panel 21 of longitudinal symmetry, respectively is equipped with two first mounting holes on two front and back first mounting panels 21, sets up the fixed orifices that correspond with four first mounting holes on bottom plate 15, and the bolt passes first mounting hole, fixed orifices in proper order and fixes first support 2 on bottom plate 15.

Further, the bottom plate 15 is further provided with an installation guide groove 12 with an inverted T-shaped cross section, a right end notch of the installation guide groove 12 is opened, and a left end notch of the installation guide groove 12 is stopped at the middle position of the bottom plate 15. The movement of the second ejector pin device is realized by arranging a T-shaped groove installation connecting structure on the bottom plate 15 on the right side, the application range of the device is widened, an installation guide groove 12 with an inverted T-shaped cross section is formed in the bottom plate 15, a notch at the right end of the installation guide groove 12 is opened, a notch at the left end is stopped at the middle position of the bottom plate 15 and takes a round opening as a port, and the second support 9 is fixed on the T-shaped groove through a T-shaped bolt assembly 13.

Further, the second thimble device further includes a T-bolt assembly 13, and the T-bolt assembly 13 includes a T-bolt and a nut, and the T-bolt is disposed in the installation guide groove 12. The T-shaped screw is arranged in the inverted T-shaped installation guide groove 12 in a matching mode, and a nut is matched on the T-shaped screw.

Further, the bottom of second support 9 is formed with bilateral symmetry's second mounting panel 90, is equipped with the second mounting hole on the second mounting panel 90, and the T screw passes the second mounting hole and is connected with the nut cooperation. The bottom integrated into one piece of second support 9 has bilateral symmetry's second mounting panel 90, respectively is equipped with a second mounting hole on the second mounting panel 90 on both sides, and the second mounting hole is the connecting hole of opening form, promotes the flexibility of junction, has adjusted second support 9 along installation guide way 12 after the ascending position of left and right sides, passes second mounting hole with the T screw and uses the nut cooperation with second support 9 fixed connection on bottom plate 15.

Further, the number of the spiral texture detection mechanisms is one pair, and the spiral texture detection mechanisms are respectively arranged on oil seal positions on the surfaces of the flywheel end 6 and the output end 7. The end surfaces of the flywheel end 6 and the output end 7 of the crankshaft journal are provided with thread oil seal positions, so that the rotation direction and the angle are required to be detected, and the spiral texture detection mechanism is provided with two positions for respectively detecting the thread oil seal positions of the two positions.

obviously, the utility model discloses a two apical structures, step motor is connected to one end and predetermined speed 60r/min forward and reverse rotation is realized, another adopts the apical structure of cylinder drive, the weight is hung as required and is arranged in on the crankshaft oil blanket position, through continuous rotation 1 minute, it walks the position according to the work piece axial to detect the weight, with the direction of turning and the helical angle of judging work piece excircle surperficial spiral texture, it is normal to confirm crankshaft oil blanket position, can confirm the best helical angle size in oil blanket position, the extravagant lubricating oil has been avoided, solve the defect that the range estimation brought, the detection performance is improved.

The foregoing is a preferred embodiment of the present invention, and it should be understood that those skilled in the art can derive the related technical solutions through logic analysis, reasoning or experiment based on the present invention without creative efforts, and therefore, these related technical solutions should be within the protection scope of the present claims.

Claims (8)

1. The utility model provides a general gasoline engine crankshaft surface spiral texture detection device, includes bottom plate (15), its characterized in that: a first thimble device and a second thimble device which are bilaterally symmetrical are fixedly mounted on the base plate (15), the first thimble device comprises a first support (2) and a motor (1), the motor (1) is fixedly mounted on the left side surface of the first support (2), a first thimble mounting hole (20) communicated with an output shaft of the motor (1) is formed in the first support (2), a bearing (3) is arranged in the first thimble mounting hole (20), a first thimble (4) is sleeved on the bearing (3), and the first thimble (4) is connected with the output shaft of the motor (1); the second ejector pin device comprises a second support (9) and an air cylinder (11), the air cylinder (11) is fixedly mounted on the right side face of the second support (9), a second ejector pin mounting hole (10) communicated with an output shaft of the air cylinder (11) is formed in the second support (9), the second ejector pin mounting hole (10) corresponds to the first ejector pin mounting hole (20) in the left-right direction, a second ejector pin (8) is movably arranged in the second ejector pin mounting hole (10), and the second ejector pin (8) is connected with the output shaft of the air cylinder (11); the end face center hole of the flywheel end (6) of the crankshaft journal is in matched contact with the first ejector pin (4), and the end face center hole of the output end (7) is in matched contact with the second ejector pin (8); the oil seal structure is characterized by further comprising a spiral texture detection mechanism, wherein the spiral texture detection mechanism comprises a balance weight (14) and a flexible cable (5), and the balance weight (14) is suspended on the oil seal position on the end surface of the crankshaft journal through the flexible cable (5).

2. the device for detecting the spiral texture on the surface of the general engine crankshaft according to claim 1, wherein: the bearing (3) is an outer spherical bearing.

3. The device for detecting the spiral texture on the surface of the general engine crankshaft according to claim 1 or 2, wherein: the bearings (3) are arranged in the first thimble mounting hole (20) at intervals from left to right.

4. The device for detecting the spiral texture on the surface of the general engine crankshaft according to claim 3, wherein: the first ejector pin device also comprises a fixing piece; the bottom shaping of first support (2) has first mounting panel (21) of longitudinal symmetry, is equipped with first mounting hole on first mounting panel (21), is equipped with the fixed orifices on bottom plate (15), and the mounting passes first mounting hole, fixed orifices in proper order.

5. The device for detecting the spiral texture on the surface of the general engine crankshaft according to claim 1 or 4, wherein: the bottom plate (15) is also provided with an installation guide groove (12) with an inverted T-shaped cross section, the right end notch of the installation guide groove (12) is opened, and the left end notch is stopped at the middle position of the bottom plate (15).

6. The device for detecting the spiral texture on the surface of the general engine crankshaft according to claim 5, wherein: the second ejector pin device further comprises a T-shaped bolt assembly (13), the T-shaped bolt assembly (13) comprises a T screw and a nut, and the T screw is arranged in the installation guide groove (12).

7. The device for detecting the spiral texture on the surface of the general engine crankshaft according to claim 6, wherein: the bottom shaping of second support (9) has bilateral symmetry's second mounting panel (90), is equipped with the second mounting hole on second mounting panel (90), and the T screw passes the second mounting hole and is connected with the nut cooperation.

8. The device for detecting the spiral texture on the surface of the general engine crankshaft according to claim 1, 2, 6 or 7, wherein: the number of the spiral texture detection mechanisms is one pair, and the spiral texture detection mechanisms are respectively arranged on oil seal positions on the surfaces of the flywheel end (6) and the output end (7).