Automobile sewing thread detection device and method

Abstract

The invention belongs to the technical field of automobile part detection, particularly relates to an automobile sewing thread detection device and method, and aims to solve the problem that an existing automobile sewing thread detection device cannot effectively weaken the influence of poor detection precision caused by structural tolerance or long-term use of the device, the following scheme is provided: the automobile sewing thread detection device comprises a base; a linear motor. According to the automobile sewing thread detection device and method disclosed by the invention, before the device detects the automobile sewing thread, the distance deviation between the parallel frame and the detection block can be corrected and compensated, so that the detection block and the parallel frame can be kept relatively parallel; the probe of the dial indicator I and the probe of the dial indicator II on the parallel frame can be always kept vertical to the contact surface on the detection block, so that when the detection block detects the sewing thread, the obtained data can be close to the real deviation value of the sewing thread to the greatest extent, and the detection accuracy is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts detection, and in particular to an automobile sewing thread detection device and method. Background Art

[0002] A car is a power-driven, non-rail-borne vehicle with four or more wheels. It is mainly used to carry people and goods, and to tow vehicles carrying people and goods. In order to make the interior of the car beautiful, the car is often equipped with decorative interiors, which often need to be connected with sewing threads, and the quality of the connection needs to be tested using a detection device.

[0003] Due to long-term use and tolerances between structural parts, the detection blocks on existing automotive sewing thread detection devices have errors in two adjacent detection parts, resulting in inaccurate data when observing the detection results using a dial indicator, resulting in poor detection results. Summary of the Invention

[0004] The present invention discloses an automotive sewing thread detection device and method, aiming to solve the technical problem in the background art that the existing automotive sewing thread detection device cannot effectively reduce the influence of poor detection accuracy caused by the structural tolerance of the device itself or long-term use.

[0005] The present invention provides an automotive sewing thread detection device, comprising:

[0006] base;

[0007] A linear motor, wherein the bottom of the linear motor is fixedly connected to the upper side of the base, the output end of the linear motor is fixedly connected to the mounting plate, and the outside of the mounting plate is fixedly connected to the XZ-axis displacement platform, and the output end of the XZ-axis displacement platform is fixedly connected to the fixing plate;

[0008] a detection block, the bottom of which is fixedly connected to the upper side of the fixing plate;

[0009] A connecting piece, the connecting piece is fixedly connected to the side opposite to the mounting plate, a parallel frame is provided above the connecting piece, and two mutually perpendicular dial indicators 1 and 2 are provided on the parallel frame;

[0010] An offset compensation module is located between the parallel frame and the connector. The offset compensation module is used to correct and compensate for the distance deviation between the parallel frame and the detection block before the device performs automotive sewing thread detection.

[0011] The lockhole that is formed on the upper part of the sliding panel also is formed, and the lockhole that is formed on the lower part of the sliding panel also is formed. The lockhole that is formed on the lower part of the sliding panel also is formed. The outer ends of the three locking rings are all clamped with a limit rod, and a round opening is opened at one end of the limit rod, and a thin rod is movably connected to the round opening. The outer side of the thin rod is movably connected to a U-shaped seat, and the upper side of the U-shaped seat is fixedly connected to the bottom of the lower disc seat. The inner wall of the U-shaped seat is slidably connected to the outer side of the limit rod, and the outer side of the thin rod is fixedly connected to a coil spring, and the end of the coil spring away from the thin rod is fixedly connected to a fixing ring, and the fixing ring is aligned with the U-shaped seat. The two ends of the limit rods away from the U-shaped seat one are all provided with a U-shaped seat two, and the U-shaped seat two are provided with a circular groove, and a pin is inserted in the circular groove. The end of the limit rod close to the U-shaped seat two is provided with an engaging groove, and the inner wall of the engaging groove is snapped with the outside of the pin, and the outside of the pin is fixedly connected with a sear, and the outside of the sear is fixedly connected with a spring two, and the end of the spring two away from the sear is fixedly connected to the outside of the U-shaped seat two on the same side, and a cleaning module is provided on the detection block.

[0012] In a preferred embodiment, the cleaning module includes two symmetrical cross bars, which are fixedly connected to the side opposite to the detection block, and the outsides of the two cross bars are fixedly connected to two symmetrical inclined frames, and the two inclined frames on the same side are slidably connected to the same fixed platform, and the opposite sides of the two fixed platforms are fixedly connected to wiping cotton pieces, the outsides of the wiping cotton pieces are fitted with the outside of the detection block, and the outsides of the two fixed platforms are fixedly connected to two symmetrical transmission parts, and the outsides of the two transmission parts on the same side are slidably connected to the same linkage frame, one of the cross bars is provided with a groove, and a screw rod is movably connected in the groove, and a movable part is provided on the outside of the screw rod, and the movable part is fixedly connected to the inner wall of the linkage frame on the same side, and is fixedly connected to the outside of the cross bar on the same side of the screw rod. It is connected to motor 1, and the output end of motor 1 is connected to one side of the screw rod through a coupling; the outside of the detection block is fixedly connected to two symmetrical mounting frames, and the mounting frames are movably connected to round rods, and the outside of the round rods is fixedly connected to bellows. Two symmetrical air pumps are provided on the two bellows, and the output ends of the air pumps are connected to the bellows through conduits, and the outside of the mounting frames is fixedly connected to motor 2, and the output end of motor 2 is connected to a half gear through the mounting frame through a coupling; the outsides of the two round rods are fixedly connected to gear ring 2, which meshes with the half gear on the same side, and the outsides of the round rods are fixedly connected to coil spring 2, and the end of coil spring 2 away from the round rod is fixedly connected to fixing ring 2, and fixing ring 2 is fixedly connected to the side opposite to the outside of the mounting frame on the same side.

[0013] A method for detecting automotive sewing threads, using the automotive sewing thread detection device described above, comprises the following steps:

[0014] Step 1: Before testing automotive sewing threads, use the offset compensation module to adjust the spacing deviation between the parallel frame and the detection block so that the probes of dial indicators 1 and 2 on the parallel frame can contact the surface of the detection block. Use the zeroing block to return dial indicators 1 and 2 to zero.

[0015] Step 2: Start the linear motor and the XZ-axis displacement platform so that the detection block can be tested along the path of the automotive sewing line. Record the numerical changes on dial indicator 1 and dial indicator 2 to obtain the deviation of the sewing line on the Z and X axes. After the test is completed, use the cleaning module to clean the detection block.

[0016] From the above, it can be seen that the automobile sewing thread detection device provided by the present invention has the function of correcting and compensating the distance deviation between the parallel frame and the detection block before the device performs automobile sewing thread detection, so that the detection block and the parallel frame can maintain relative parallelism, and the probes of the dial indicator 1 and the dial indicator 2 on the parallel frame can always remain perpendicular to the contact surface on the detection block. Therefore, when the detection block detects the sewing thread, the data obtained can be as close as possible to the actual deviation value of the sewing thread, thereby greatly improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an automotive sewing thread detection device proposed by the present invention;

[0018] Figure 2 This is a side structural schematic diagram of a vehicle sewing thread detection device proposed by the present invention;

[0019] Figure 3 This is a schematic structural diagram of an offset compensation module of an automotive sewing thread detection device proposed by the present invention;

[0020] Figure 4 This is a schematic diagram of the locking ring structure of an automotive sewing thread detection device proposed by the present invention;

[0021] Figure 5 This is a schematic diagram of the limit rod structure of the automotive sewing thread detection device proposed by the present invention;

[0022] Figure 6 This is a schematic structural diagram of a cleaning module of an automotive sewing thread detection device proposed by the present invention;

[0023] Figure 7 This is a schematic diagram of the bellows structure of an automotive sewing thread detection device proposed by the present invention.

[0024] In the figure: 1. Base; 2. Linear motor; 3. Mounting plate; 4. XZ-axis displacement platform; 5. Fixed plate; 6. Detection block; 7. Parallel frame; 8. Offset compensation module; 801. Upper plate seat; 802. Lower plate seat; 803. Threaded rod; 804. Ball head; 805. Ball seat; 806. Rotating block; 807. Gear ring 1; 808. Locking ring; 809. Guide buckle; 810. Rack; 811. Spring 1; 812. U-shaped seat 1; 813. Fixed ring 1; 814. Coil spring 1; 815. Limit rod; 816. Engaging groove; 817. U-shaped seat 2 ;818, latch;819, sear;820, spring two;9, cleaning module;901, crossbar;902, inclined plane frame;903, fixed platform;904, cleaning cotton pad;905, transmission part;906, linkage frame;907, movable part;908, screw rod;909, motor one;910, mounting frame;911, round rod;912, bellows;913, air pump;914, motor two;915, half gear;916, gear ring two;917, coil spring two;918, fixed ring two;10, dial indicator one;11, dial indicator two;12, connecting parts. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] The automotive sewing thread detection device disclosed in the present invention is mainly used in scenarios where existing automotive sewing thread detection devices cannot effectively reduce the impact of poor detection accuracy caused by the device's own structural tolerance or long-term use.

[0027] Reference Figure 1-Figure 7 , an automobile sewing thread detection device, comprising:

[0028] Base 1;

[0029] Linear motor 2, the bottom of linear motor 2 is connected to the upper side of base 1 by bolts, the output end of linear motor 2 is connected to mounting plate 3 by bolts, and the outside of mounting plate 3 is connected to XZ-axis displacement platform 4 by bolts, and the output end of XZ-axis displacement platform 4 is connected to fixing plate 5 by bolts;

[0030] Detection block 6, the bottom of the detection block 6 is connected to the upper side of the fixing plate 5 by bolts;

[0031] A connector 12 is connected to the mounting plate 3 on one side thereof by bolts. A parallel frame 7 is provided above the connector 12. Two mutually perpendicular dial indicators 10 and 11 are provided on the parallel frame 7.

[0032] The offset compensation module 8 is located between the parallel frame 7 and the connecting piece 12. The offset compensation module 8 is used to correct and compensate for the distance deviation between the parallel frame 7 and the detection block 6 before the device performs automobile sewing thread detection.

[0033] The device uses the offset compensation module 8 to correct and compensate the distance deviation between the parallel frame 7 and the detection block 6 before the device performs automobile sewing thread detection, so that the detection block 6 and the parallel frame 7 can remain relatively parallel, and the probes of the dial indicator 10 and the dial indicator 2 11 on the parallel frame 7 can always remain perpendicular to the contact surface on the detection block 6. Therefore, when the detection block 6 detects the sewing thread, the data obtained can be as close to the actual deviation value of the sewing thread as possible, greatly improving the accuracy of the detection.

[0034] Reference Figure 3 、 Figure 4 and Figure 5In a preferred embodiment, the offset compensation module 8 includes an upper disc seat 801, the upper side of the upper disc seat 801 is connected to the bottom of the parallel frame 7 by bolts, a lower disc seat 802 is provided below the upper disc seat 801, the outer portion of the lower disc seat 802 is connected to the outer portion of the connector 12 by bolts, and three circular holes equidistantly distributed around the circumference are opened on the lower disc seat 802, each of which is provided with a threaded rod 803, and the upper side of the threaded rod 803 is rotatably connected to a ball head 804 through a bearing, and the outer portion of the ball head 804 is provided with a ball seat 805; the upper side of the three ball seats 805 is connected to the bottom of the upper disc seat 801 by bolts, and the outer portion of the threaded rod 803 is provided with a toothed The ring 807 and the upper side of the gear ring 807 are rotatably connected to the bottom of the lower disc seat 802 through bearings, and the outer side of the gear ring 807 is provided with a locking ring 808. The outer side of the locking ring 808 is slidably connected to a guide buckle 809. The upper side of the guide buckle 809 is connected to the bottom of the lower disc seat 802 by bolts, and the inner wall of the locking ring 808 is connected to a rack 810 by bolts. The rack 810 is clamped with the gear ring 807 on the same side; the side of the guide buckle 809 away from the gear ring 807 is connected to two symmetrical springs 811 by bolts, and the end of the spring 811 away from the guide buckle 809 is bolted to the inner wall of the locking ring 808 on the same side. The outer parts of the three locking rings 808 are all connected with the limiting rod 815, and a circular opening is provided at one end of the limiting rod 815, in which a thin rod is rotatably connected through a bearing. The outer part of the thin rod is rotatably connected to a U-shaped seat 812 through a bearing. The upper side of the U-shaped seat 812 and the bottom of the lower disc seat 802 are connected by bolts. The inner wall of the U-shaped seat 812 is slidably connected to the outer part of the limiting rod 815, and the outer part of the thin rod is connected with a coil spring 814 through bolts. The end of the coil spring 814 away from the thin rod is connected with a fixing ring 813 through bolts. The fixing ring 813 is connected to the U-shaped seat 812 The opposite side is connected by bolts; a plurality of limit rods 815 are provided with a U-shaped seat 2 817 at one end away from the U-shaped seat 1 812, and a circular groove is provided on the U-shaped seat 2 817, in which a latch 818 is inserted, and an engaging groove 816 is provided at one end of the limit rod 815 close to the U-shaped seat 2 817, and the inner wall of the engaging groove 816 is clamped with the outside of the latch 818, and the outside of the latch 818 is connected with a sear 819 by bolts, and the outside of the sear 819 is connected with a spring 2 820 by bolts, and the end of the spring 2 820 away from the sear 819 is connected to the outside of the U-shaped seat 2 817 on the same side by bolts, and a cleaning module 9 is provided on the detection block 6.

[0035] In a specific application scenario, the offset compensation module 8 is mainly suitable for the offset compensation link in the offset compensation process, that is, the offset compensation module 8 uses the threaded rod 803 and the ball head 804 to change the relative distance between the ball head 804 and the lower disc seat 802, so that the parallel frame 7 is deflected at a certain angle, thereby improving the convenience and efficiency of adjustment. The threaded rod 803 arranged in an equilateral triangle and the mutually locked gear ring 807 and rack 810 ensure that the parallel frame 7 can obtain sufficient bearing capacity to resist deformation, which effectively assists the accuracy of detection.

[0036] Reference Figure 6 and Figure 7 In a preferred embodiment, the cleaning module 9 includes two symmetrical cross bars 901, and the cross bars 901 are connected to the detection block 6 on one side by bolts. The outsides of the two cross bars 901 are connected to two symmetrical inclined frames 902 by bolts. The two inclined frames 902 on the same side are slidably connected to the same fixed platform 903, and the opposite sides of the two fixed platforms 903 are connected to wiping cotton sheets 904 by bolts. The outsides of the wiping cotton sheets 904 are in contact with the outside of the detection block 6. The exterior of the fixed platform 903 is connected to two symmetrical transmission members 905 by bolts. The exterior of the two transmission members 905 on the same side is slidably connected to the same linkage frame 906. A groove is formed on one of the cross bars 901, and a screw rod 908 is rotatably connected in the groove through a bearing. A movable member 907 is provided on the exterior of the screw rod 908. The movable member 907 is connected to the inner wall of the linkage frame 906 on the same side by bolts. A motor 909 is also connected to the exterior of the cross bar 901 on the same side as the screw rod 908 by bolts. The output end of the motor 1 909 is connected to one side of the screw 908 through a coupling; the outside of the detection block 6 is connected to two symmetrical mounting frames 910 by bolts, and the mounting frames 910 are rotatably connected to round rods 911 through bearings. The outside of the round rods 911 are connected to bellows 912 by bolts, and two symmetrical air pumps 913 are provided on the two bellows 912. The output ends of the air pumps 913 are connected to the bellows 912 through conduits, and the outside of the mounting frames 910 are connected to the motor 2 91 4. The output end of motor 2 914 passes through the mounting frame 910 and is connected to a half gear 915 via a coupling. The exteriors of the two round rods 911 are both bolted to gear ring 2 916, which meshes with the half gear 915 on the same side. The exteriors of the round rods 911 are both bolted to coil spring 2 917, and the ends of coil spring 2 917 away from the round rods 911 are both bolted to fixing ring 2 918, which is bolted to the side opposite to the exterior of the mounting frame 910 on the same side.

[0037] In a specific application scenario, the cleaning module 9 is mainly suitable for the cleaning link in the cleaning process, that is, the cleaning module 9 uses the screw rod 908 and the linkage frame 906 to make the fixed platform 903 and the wiping cotton sheet 904 fit the surface of the detection block 6 for wiping, which effectively improves the cleaning effect of the wiping cotton sheet 904 on impurities on the surface of the detection block 6. By using the half gear 915, the gear ring 916 and the coil spring 917, the bellows 912 can blow back and forth on the detection block 6, avoiding dust and impurities from adhering to the detection block 6 again, affecting the use function of the detection block 6 in the detection, and ensuring the detection accuracy.

[0038] A method for detecting automotive sewing threads, using the automotive sewing thread detection device described above, comprises the following steps:

[0039] Step 1: Before testing the automotive sewing thread, use the offset compensation module 8 to adjust the spacing deviation between the parallel frame 7 and the detection block 6 so that the probes of the dial indicator 10 and the dial indicator 2 11 on the parallel frame 7 can contact the surface of the detection block 6, and use the zeroing block to reset the dial indicator 10 and the dial indicator 2 11 to zero (before testing, overcome the elastic force of the spring 2 820 to pull out the pin 818, overcome the torsion of the coil spring 1 814 to rotate the limit rod 815 out of the U-shaped seat 2 817, overcome the elastic force of the spring 1 811 and gently push the spring 1 811 to make the rack 810 releases the follow-up action of gear ring 1 807, grabs and rotates rotating block 806, causing threaded rod 803 to rise or fall on lower disc seat 802, driving ball head 804 connected to threaded rod 803 to rotate on ball seat 805, thereby causing parallel frame 7 connected to upper disc seat 801 to deflect by a certain angle. The three threaded rods 803 are adjusted according to the angle and distance deviation between detection block 6 and parallel frame 7, so that parallel frame 7 and detection block 6 remain parallel, allowing the probes on dial indicator 10 and dial indicator 2 11 to lightly touch the surface of detection block 6);

[0040] Step 2: Start the linear motor 2 and the XZ-axis displacement platform 4 so that the detection block 6 can be detected along the path of the automobile sewing line, record the numerical changes on the dial indicator 10 and the dial indicator 2 11, and obtain the deviation of the sewing line on the Z axis and the X axis. After the detection is completed, use the cleaning module 9 to clean the detection block 6 (after the detection is completed, start the motor 1 909, the motor 1 909 drives the screw rod 908 to rotate, so that the movable part 907 drives the fixed platform 903 on the linkage frame 906 to slide along the outside of the detection block 6, so that the wiping cotton piece 904 wipes the detection block 6, start the motor 2 914, the motor 2 914 drives the gear ring 2 916 engaged with the half gear 915 to rotate, so that the air pump 913 on the round rod 911 reciprocates at a certain angle under the torsion of the coil spring 2 917, start the air pump 913, the air pump 913 pumps air into the bellows 912, and sweeps and blows the detection block 6 during the reciprocating rotation).

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automotive sewing thread detection device, characterized in that: include: Base (1); A linear motor (2), wherein the bottom of the linear motor (2) is fixedly connected to the upper side of the base (1), the output end of the linear motor (2) is fixedly connected to a mounting plate (3), the outside of the mounting plate (3) is fixedly connected to an XZ-axis displacement platform (4), and the output end of the XZ-axis displacement platform (4) is fixedly connected to a fixing plate (5); A detection block (6), the bottom of which is fixedly connected to the upper side of the fixing plate (5); A connecting piece (12), the connecting piece (12) is fixedly connected to a side opposite to the mounting plate (3), a parallel frame (7) is provided above the connecting piece (12), and two mutually perpendicular dial indicators (10) and (11) are provided on the parallel frame (7); An offset compensation module (8) is located between the parallel frame (7) and the connecting piece (12), and the offset compensation module (8) is used to correct and compensate for the distance deviation between the parallel frame (7) and the detection block (6) before the device performs automobile sewing thread detection.

2. The automotive sewing thread detection device according to claim 1, characterized in that: The offset compensation module (8) comprises an upper disc seat (801), the upper side of the upper disc seat (801) is fixedly connected to the bottom of the parallel frame (7), a lower disc seat (802) is provided below the upper disc seat (801), the exterior of the lower disc seat (802) is fixedly connected to the exterior of the connecting member (12), the lower disc seat (802) is provided with three circular holes equidistantly distributed around the circumference, threaded rods (803) are provided in the circular holes, and the upper sides of the threaded rods (803) are movably connected to ball heads (804), and the exteriors of the ball heads (804) are provided with ball seats (805).

3. The automotive sewing thread detection device according to claim 2, characterized in that: The upper sides of the three ball seats (805) are fixedly connected to the bottom of the upper disc seat (801), the outer sides of the threaded rods (803) are provided with toothed rings (807), the upper sides of the toothed rings (807) are movably connected to the bottom of the lower disc seat (802), the outer sides of the toothed rings (807) are provided with locking rings (808), the outer sides of the locking rings (808) are slidably connected to guide buckles (809), the upper sides of the guide buckles (809) are fixedly connected to the bottom of the lower disc seat (802), and the inner walls of the locking rings (808) are fixedly connected to racks (810), and the racks (810) are clamped to the toothed rings (807) on the same side.

4. The automotive sewing thread detection device according to claim 3, characterized in that: The guide buckle (809) is fixedly connected to two symmetrical springs (811) on one side away from the gear ring (807), and one end of the spring (811) away from the guide buckle (809) is fixedly connected to the inner wall of the locking ring (808) on the same side, and the bottom of the threaded rod (803) is fixedly connected to a rotating block (806).

5. The automotive sewing thread detection device according to claim 4, characterized in that: The outsides of the three locking rings (808) are all clamped with a limiting rod (815), one end of the limiting rod (815) is provided with a circular opening, a thin rod is movably connected in the circular opening, the outside of the thin rod is movably connected to a U-shaped seat (812), the upper side of the U-shaped seat (812) is fixedly connected to the bottom of the lower disc seat (802), the inner wall of the U-shaped seat (812) is slidably connected to the outside of the limiting rod (815), and the outside of the thin rod is fixedly connected to a coil spring (814), the end of the coil spring (814) away from the thin rod is fixedly connected to a fixing ring (813), and the fixing ring (813) is fixedly connected to the side opposite to the U-shaped seat (812).

6. The automotive sewing thread detection device according to claim 5, characterized in that: The ends of the plurality of limit rods (815) away from the U-shaped seat one (812) are all provided with a U-shaped seat two (817), the U-shaped seat two (817) is provided with a circular groove, and a latch (818) is inserted into the circular groove, and the ends of the limit rods (815) close to the U-shaped seat two (817) are all provided with an engaging groove (816), the inner wall of the engaging groove (816) is engaged with the outer part of the latch (818), and the outer part of the latch (818) is fixedly connected with a stopper (819), and the outer part of the stopper (819) is fixedly connected with a spring two (820), and the end of the spring two (820) away from the stopper (819) is fixedly connected to the outer part of the U-shaped seat two (817) on the same side, and a cleaning module (9) is provided on the detection block (6).

7. The automotive sewing thread detection device according to claim 6, characterized in that: The cleaning module (9) comprises two symmetrical cross bars (901), the cross bars (901) being fixedly connected to the sides opposite to the detection block (6), the exteriors of the two cross bars (901) being fixedly connected to two symmetrical inclined plane frames (902), the two inclined plane frames (902) on the same side being slidably connected to the same fixed platform (903), and the opposite sides of the two fixed platforms (903) being fixedly connected to wiping cotton pieces (904), the exteriors of the wiping cotton pieces (904) being in contact with the exteriors of the detection block (6), and the exteriors of the two fixed platforms (903) being fixedly connected to two symmetrical The transmission member (905) is provided, and the exterior of the two transmission members (905) on the same side is slidably connected to the same linkage frame (906). A groove is provided on one of the cross bars (901), and a screw rod (908) is movably connected in the groove. A movable member (907) is provided on the exterior of the screw rod (908). The movable member (907) is fixedly connected to the inner wall of the linkage frame (906) on the same side. A motor (909) is fixedly connected to the exterior of the cross bar (901) on the same side as the screw rod (908). The output end of the motor (909) is connected to one side of the screw rod (908) through a coupling.

8. The automotive sewing thread detection device according to claim 7, characterized in that: The detection block (6) is fixedly connected to two symmetrical mounting frames (910) on the outside, and the mounting frames (910) are movably connected to round rods (911). The outsides of the round rods (911) are fixedly connected to bellows (912). The two bellows (912) are provided with two symmetrical air pumps (913). The output ends of the air pumps (913) are connected to the bellows (912) through conduits. The outsides of the mounting frames (910) are fixedly connected to motor 2 (914). The output end of motor 2 (914) passes through the mounting frame (910) and is connected to a half gear (915) through a coupling.

9. The automotive sewing thread detection device according to claim 8, characterized in that: The exteriors of the two round rods (911) are fixedly connected to a second gear ring (916), which meshes with the half gear (915) on the same side. The exteriors of the round rods (911) are fixedly connected to a second coil spring (917), and one end of the second coil spring (917) away from the round rod (911) is fixedly connected to a second fixing ring (918). The second fixing ring (918) is fixedly connected to the opposite side of the exterior of the mounting frame (910) on the same side.

10. A method for detecting automotive sewing threads, using the automotive sewing thread detection device according to claim 9, characterized in that: The steps include: Step 1: Before performing automobile sewing thread detection, use the offset compensation module (8) to adjust the spacing deviation between the parallel frame (7) and the detection block (6) so that the probes of the dial indicator 1 (10) and the dial indicator 2 (11) on the parallel frame (7) can contact the surface of the detection block (6), and use the zeroing block to reset the dial indicator 1 (10) and the dial indicator 2 (11); Step 2: Start the linear motor (2) and the XZ axis displacement platform (4) so ​​that the detection block (6) can be tested along the path of the automobile sewing line, record the numerical changes on the dial indicator 1 (10) and the dial indicator 2 (11), and obtain the deviation of the sewing line on the Z axis and the X axis. After the detection is completed, use the cleaning module (9) to clean the detection block (6).

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