A linear dimension detection device for automotive pipe-shaped fittings

Abstract

The invention relates to the technical field of workpiece linear dimension measurement, in particular to a linear dimension detection device for automobile tubular accessories; the device comprises a detection frame and two detection seats symmetrically arranged on the detection frame; the two detection seats are close to each other and are rotatably connected to a driving roller and a driven roller; the outer walls of the driving roller and the driven roller are transmission-connected to a conveyor belt; the driving roller is driven by an independent motor; the two conveyor belts are close to each other and are evenly provided with detection holes; the detection holes are movably connected to detection rods; the two detection seats are close to each other and are provided with track grooves corresponding to the conveyor belts and having the same shape; the invention can load new tubular accessories during the continuous and extended detection process of the tubular accessories on the detection device, thereby greatly saving the detection time of the tubular accessories, realizing continuous length detection of the tubular accessories, and the detection time is relatively long. Compared with the existing detection methods, the detection accuracy and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece linear dimension measurement, and specifically relates to a linear dimension detection device for automotive tubular fittings. Background Art

[0002] In the processing and manufacturing of automotive parts, linear dimension measurements are required for tubular fittings before and after processing. Linear dimension measurements include length measurement, diameter measurement, thickness measurement, etc. The length of a tubular fitting is one of the important dimensions of the tubular fitting. Generally, measuring tools such as vernier calipers and tape measures are used for measurement. To avoid displacement of the tubular fitting during the measurement process, the tubular fitting is generally placed on a clamping fixture for auxiliary measurement. After the clamping fixture clamps the tubular fitting, the inspector will measure the dimensions of the tubular fitting. Manual measurement is inefficient and has large errors. Therefore, with the iteration of technology, some devices for automatically detecting the length of workpieces have emerged. The specific operation is that the inspector first clamps the tubular fitting onto the detection device, and the detection components in the detection device will work to achieve the detection of the length of the tubular fitting. During the detection process, other tubular fittings are in a waiting state until the tubular fitting whose length detection is completed is removed from the detection device before a new tubular fitting can be detected. For batch detection, this undoubtedly affects the detection efficiency. In addition, to further improve the detection accuracy, the detection device generally extends the length detection time of a single tubular fitting, which further reduces the length detection efficiency of the tubular fitting. Summary of the Invention

[0003] To make up for the deficiencies of the prior art, the present invention proposes a linear dimension detection device for automotive tubular fittings. Since the tubular fitting on the detection device can continuously load new tubular fittings during the extended detection process, the detection time of the tubular fitting is greatly saved, and continuous length detection of the tubular fitting is achieved. Moreover, the detection time lasts for a long time. Compared with the existing detection methods, both the detection accuracy and efficiency are improved.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A linear dimension detection device for an automotive tubular fitting described in the present invention includes a detection frame and two detection seats symmetrically arranged on the detection frame; on the mutually approaching surfaces of the two detection seats, a driving roller and a driven roller are rotatably connected; on the outer walls of the driving roller and the driven roller, a conveyor belt is drivingly connected; the driving roller is driven by an independent motor; on the mutually approaching surfaces of the two conveyor belts, detection holes are uniformly arranged; in the detection holes, detection rods are movably connected; on the mutually approaching surfaces of the two detection seats, there are track grooves corresponding to and having the same shape as the conveyor belts; the depth of the front end of the track groove is less than that of the rear end; one end of the detection rod extends into the track groove; on the outer wall of the detection rod, a detection groove is axially arranged; the detection groove penetrates through the other end of the detection rod; inside the detection groove and near one end of the detection rod, a pressure sensor is fixedly connected; inside the detection groove and near the other end of the detection rod, a detection block is slidably connected; between the detection block and the corresponding pressure sensor, a spring is connected; on the outer wall of the other end of the detection rod, a detection disk is sleeved; the inner wall of the detection disk is fixedly connected to the detection block.

[0005] Preferably, sliding rods are arranged at the left and right ends of the detection frame; the length direction of the sliding rods is consistent with the front and rear direction; on the sliding rods of the detection frame, two partition plates are slidably connected in the front and rear directions; on the two partition plates, there are first bolts capable of contacting the sliding rods; the two partition plates are located directly below the two detection seats.

[0006] Preferably, sliding strips are arranged on the upper surfaces of the front and rear ends of the detection frame; the length direction of the sliding strips is consistent with the left and right direction; the detection seats are slidably connected to the sliding strips through sliding grooves; the sliding grooves penetrate forward and are threadedly connected with second bolts.

[0007] Preferably, a groove plate is arranged inside the track groove and near the bottom of the groove; the groove plate has the same shape as the track groove; the width of the groove plate is less than the width of the track groove; the middle section of the groove plate is hinged to the middle section of the track groove; the bottom of the track groove penetrates in the left and right direction and is threadedly connected with a third bolt; the third bolt abuts against the front and rear positions on the back surface of the groove plate.

[0008] Preferably, magnets are arranged on the mutually approaching surfaces of the two groove plates; one end of the detection rod close to the groove plate is made of a magnetic material and can be attracted by the groove plate.

[0009] Preferably, tooth teeth are arranged on the groove walls of the track groove; one end of the detection rod close to the bottom of the track groove is fixedly connected with a gear; the gear is in meshing transmission with the tooth teeth; the surface of the detection disk in contact with the workpiece is set as a grinding surface.

[0010] Preferably, the tooth teeth in one of the track grooves are arranged on the outer groove wall of the track groove, and the tooth teeth in the other track groove are arranged on the inner groove wall of the track groove; the rotation directions of the two opposite detection rods are opposite.

[0011] Preferably, a limiting plate is provided at the upper position between the two detection seats; guide plates are provided at the ends of the limiting plate; the limiting plate is fixedly connected to the detection seat through an L-shaped block; the detection disk on the outer wall of the detection rod can enter the inner side of the limiting plate under the guidance of the guide plate; the limiting plate is arranged close to the corresponding conveyor belt.

[0012] Preferably, cleaning brushes are provided on the mutually remote sides of the two limiting plates.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. Since the tubular fittings on the detection device can load new tubular fittings continuously and extend the detection process during the detection process, the detection time of the tubular fittings is greatly saved, the continuous length detection of the tubular fittings is realized, and the detection time lasts for a long time. Compared with the existing detection methods, both the detection accuracy and efficiency are improved.

[0015] 2. By arranging two partition plates under the detection seats in the present invention, the tubular fittings can fall into different positions below according to their own lengths after detection, thereby realizing the sorting of the tubular fittings, reducing the subsequent selection process, and further improving the production efficiency of the tubular fittings.

[0016] 3. The detection rod of the present invention will also move with the transmission of the conveyor belt. The other end of the detection rod is inserted into the tubular fitting to limit the tubular fitting. The other end of the detection rod will drive the detection disk to rotate. During the rotation of the detection disk, the grinding surface will drive to grind the end of the tubular fitting, so that some burrs at the end of the tubular fitting are ground flat, avoiding the influence of the existence of burrs on the accuracy of length detection. Description of the Drawings

[0017] The present invention will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 is the perspective view of the present invention;

[0019] Figure 2 is the perspective view of the detection seat and the conveyor belt of the present invention;

[0020] Figure 3 is the perspective view of the conveyor belt and the trough plate in the present invention;

[0021] Figure 4 is the perspective view of the detection rod and the detection disk in the present invention;

[0022] Figure 5 is the perspective view of one of the detection seats of the present invention;

[0023] Figure 6 is Figure 5Enlarged view of part A in [the figure];

[0024] Figure 7 It is a cross-sectional view of one of the detection seats in the present invention;

[0025] Figure 8 is Figure 7 Enlarged view of part B in [the figure];

[0026] Figure 9 It is a perspective view of another detection seat in the present invention;

[0027] Figure 10 It is a position diagram of the micro electric telescopic mechanism of the present invention.

[0028] In the figure: detection frame 1, slide bar 11, partition 12, first bolt 13, slide strip 14, detection seat 2, track groove 21, chute 22, second bolt 23, tooth 24, conveyor belt 3, driving roller 31, driven roller 32, motor 33, detection hole 34, detection rod 4, detection groove 41, pressure sensor 42, detection block 43, spring 44, detection disc 45, grinding surface 451, gear 46, groove plate 5, third bolt 51, magnet 52, limiting plate 6, guide plate 61, L-shaped block 62, cleaning brush 63, micro electric telescopic mechanism 7. Detailed implementation manners

[0029] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0030] As Figures 1 to 10 shown, the present invention includes the following embodiments:

[0031] Embodiment 1: A linear dimension detection device for automotive pipe-shaped fittings, comprising a detection frame 1 and two detection seats 2 symmetrically arranged on the detection frame 1; on the mutually approaching surfaces of the two detection seats 2, a driving roller 31 and a driven roller 32 are rotatably connected; the outer walls of the driving roller 31 and the driven roller 32 are drivingly connected to a conveyor belt 3; the driving roller 31 is driven by an independent motor 33; on the mutually approaching surfaces of the two conveyor belts 3, detection holes 34 are uniformly arranged; a detection rod 4 is movably connected in the detection holes 34; on the mutually approaching surfaces of the two detection seats 2, a track groove 21 corresponding to and having the same shape as the conveyor belt 3 is arranged; the depth of the front end of the track groove 21 is less than that of the rear end; one end of the detection rod 4 extends into the track groove 21; a detection groove 41 is axially arranged on the outer wall of the detection rod 4; the detection groove 41 penetrates through the other end of the detection rod 4; a pressure sensor 42 is fixedly connected inside the detection groove 41 near one end of the detection rod 4; a detection block 43 is slidably connected inside the detection groove 41 near the other end of the detection rod 4; the detection block 43 is connected to the corresponding pressure sensor 42 by a spring 44; a detection disc 45 is sleeved on the outer wall of the other end of the detection rod 4; the inner wall of the detection disc 45 is fixedly connected to the detection block 43.

[0032] When it is necessary to detect the length of an automotive tubular fitting, place the tubular fitting at the rear side of the detection device. Then start two independent motors 33 to work. The two independent motors 33 work synchronously. The output shaft of the independent motor 33 is fixedly connected to the end of the corresponding driving roller 31, so that the driving roller 31 is driven to rotate by the corresponding independent motor 33. During the rotation of the driving roller 31, it will drive the conveyor belt 3. The driving direction of the upper half of the conveyor belt 3 is from back to front, and the driving direction of the lower half of the conveyor belt 3 is from front to back. During the transmission of the conveyor belt 3, the detection holes 34 on the conveyor belt 3 are transmitted along with the conveyor belt 3. A detection rod 4 is movably connected in the detection hole 34, so the detection rod 4 will move along with the movement of the detection hole 34. One end of the detection rod 4 will move along the track groove 21. For the convenience of description, the detection rod 4 located in the upper half of the track groove 21 is called the upper detection rod 4, and the detection rod 4 located in the lower half of the track groove 21 is called the lower detection rod 4. During the process of one end of the upper detection rod 4 moving along the upper half of the track groove 21, since the groove depth of the track groove 21 gradually decreases from back to front, one end of the upper detection rod 4 will be extruded by the bottom of the track groove 21, so that the length of the other end of the upper detection rod 4 extending out of the track groove 21 becomes larger and larger. During the movement of the upper detection rod 4 along the track groove 21, it will also move along the corresponding detection hole 34. The upper detection rods 4 on the two conveyor belts 3 correspond one by one. When the upper detection rods 4 on the two track grooves 21 move forward, they will get closer to each other. During this process, control the tubular fitting to move forward along with the forward movement of the upper detection rod 4 while being kept between the two opposite upper detection rods 4. During the forward movement of the upper detection rods 4 on the two track grooves 21, they will get closer to each other and insert into the inner side of the tubular fitting. During the process of the other end of the detection rod 4 inserting into the tubular fitting, it will drive the detection disc 45 to approach the tubular fitting synchronously. The two opposite detection discs 45 will abut against the end of the tubular fitting. As the other end of the detection rod 4 continues to insert, the pressure sensor 42 will approach the corresponding detection disc 45, making the distance between the detection disc 45 and the corresponding pressure sensor 42 smaller. The spring 44 is further compressed. The spring 44 will transmit the elastic force to the pressure sensor 42. According to the spring 44 coefficient and the value of the pressure sensor 42, the distance from the detection disc 45 to the pressure sensor 42 is obtained. The distance between the pressure sensors 42 on the two opposite detection rods 4 can be sensed by components such as a distance sensor, so as to obtain the distance between the two opposite detection blocks 43, that is, the two opposite detection discs 45. The two opposite detection discs 45 abut against the end of the tubular fitting, so the distance between the two detection discs 45 is the length of the tubular fitting. In addition, distance sensors can also be directly set on the two detection discs 45 to directly measure the length of the tubular fitting. Specifically, select the corresponding detection method according to the use requirements. After the upper detection rod 4 moves along the front end of the track groove 21, it becomes the lower detection rod 4. The two opposite lower detection rods 4 will move backward and move away from each other at the same time. The two opposite detection discs 45 will continuously abut tightly against the end of the tubular fitting.Realize continuous detection of the length of tubular fittings. As the two lower detection rods 4 move away from each other, the other end of the lower detection rod 4 will be withdrawn from the inside of the tubular fitting. The gravity of the tubular fitting is greater than the clamping force of the two detection discs 45 on the tubular fitting, causing the tubular fitting to fall directly and be unloaded. Control a new tubular fitting to be placed between the two upper detection rods 4 and move forward as the detection rod 4 moves forward to realize the size detection of the new tubular fitting. In this way, continuous detection of the tubular fitting is realized; in this embodiment, teeth (not shown in the figure) that can mesh are provided on the outer wall of the driving roller 31 and the inner wall of the conveyor belt 3 to ensure stable transmission and avoid slipping; the conveyor belt 3 in this embodiment can be made of metal material to improve the strength of the conveyor belt 3;

[0033] In the present invention, during the continuous and extended detection process of the tubular fittings on the detection device, new tubular fittings can be loaded, so the detection time of the tubular fittings is greatly saved, continuous length detection of the tubular fittings is realized, and the detection time lasts for a long time. Compared with the existing detection methods, both the detection accuracy and efficiency are improved.

[0034] Embodiment 2: Slide rods 11 are provided at the left and right ends of the detection frame 1; the length direction of the slide rods 11 is consistent with the front-back direction; two partition plates 12 are slidably connected to the front and back of the slide rods 11 of the detection frame 1; first bolts 13 that can contact the slide rods 11 are provided on the two partition plates 12; the two partition plates 12 are located directly below the two detection seats 2.

[0035] In this embodiment, slide strips 14 are provided on the upper surfaces of the front and rear ends of the detection frame 1; the length direction of the slide strips 14 is consistent with the left-right direction; the detection seat 2 is slidably connected to the slide strip 14 through a chute 22; the chute 22 penetrates forward and is threadedly connected with a second bolt 23.

[0036] In this embodiment, a groove plate 5 is provided inside the track groove 21 and near the bottom of the groove; the groove plate 5 has the same shape as the track groove 21; the width of the groove plate 5 is smaller than the width of the track groove 21; the middle section of the groove plate 5 is hinged to the middle section of the track groove 21; the bottom of the track groove 21 penetrates along the left-right direction and is threadedly connected with a third bolt 51; the third bolt 51 abuts against the front and rear positions on the back surface of the groove plate 5.

[0037] In this embodiment, magnets 52 are provided on the surfaces of the two groove plates 5 that face each other; one end of the detection rod 4 close to the groove plate 5 is made of a magnetic material and can be attracted by the groove plate 5.

[0038] Before using the detection device to detect the tubular fitting, first loosen the first bolt 13 so that the two partitions 12 are unlocked on the sliding rod 11 of the detection frame 1. Then, push the partition 12 to slide along the sliding rod 11 to change the front and rear positions of the partition 12 under the detection seat 2. The space between the two partitions 12 is the qualified area, and other positions are the unqualified areas. The partition 12 at the front position represents the lower tolerance position of the length of the tubular fitting, and the partition 12 at the rear position represents the upper tolerance position of the length of the tubular fitting. The dimensions of the tubular fitting are allowed to be within a certain error range. After the position adjustment of the partition 12 is completed, tighten the first bolt 13 to lock the partition 12. During the backward movement of the two opposite lower detection rods 4, the distance between the two corresponding lower detection rods 4 will increase, and the other end of the lower detection rod 4 will gradually be withdrawn from the inside of the tubular fitting. The end of the tubular fitting is pushed by the detection disc 45 so that the tubular fitting is always in the middle position between the two detection seats 2. In this way, the other ends of the two opposite lower detection rods 4 are withdrawn from the inside of the tubular fitting at equal distances. When the size of the tubular fitting is too small, the tubular fitting directly falls off the lower detection rod 4 and drops into the lower unqualified area. When the size of the tubular fitting is exactly within the tolerance range, the tubular fitting will fall off the lower detection rod 4 and drop into the lower qualified area. When the size of the tubular fitting is too large, the tubular fitting will fall off the lower detection rod 4 and drop into the lower unqualified area. The tubular fittings in the unqualified area and the qualified area are separated by the partition 12, so that the tubular fittings after the detection can fall under their own length limit and be separated by the partition 12, realizing the sorting of the tubular fittings, reducing the subsequent selection process, and further improving the processing efficiency of the tubular fittings;

[0039] In addition, in this embodiment, the detection seat 2 can also be unlocked by loosening the second bolt 23 so that the sliding groove 22 on the detection seat 2 is unlocked from the sliding strip 14. In this way, the detection seat 2 can slide left and right to adjust the distance between the two detection seats 2. The detection rod 4 on the detection seat 2 will move with the movement of the detection seat 2, so that the detection device can detect tubular fittings of different lengths and improve the detection range of the detection device. After the position adjustment of the detection seat 2 is completed, tighten the second bolt 23. After the second bolt 23 is tightened, the detection seat 2 will be locked on the detection frame 1;

[0040] In this embodiment, the length of the third bolt 51 at the front position on the detection base 2 inserted into the track groove 21 is greater than the length of the third bolt 51 at the rear position inserted into the track groove 21. The depth of the track groove 21 is limited by the inclination angle of the groove plate 5. When it is necessary to improve the sorting accuracy of the pipe fittings, it is necessary to turn the third bolt 51 so that the length of the third bolt 51 at the front position inserted into the track groove 21 is reduced, and the length of the third bolt 51 at the rear position inserted into the track groove 21 is increased. In this way, the inclination angle of the groove plate 5 in the track groove 21 is reduced, and the depth difference between the front end and the rear end of the track groove 21 is reduced. In this way, it is possible to detect and sort pipe fittings with a small difference in length dimensions;

[0041] In this embodiment, in order to further improve the stability of the movement of the detection rod 4, one end of the detection rod 4 close to the groove plate 5 is made of a magnetic material, such as iron. One end of the detection rod 4 close to the groove plate 5 is magnetically attracted by the groove plate 5, so that the detection rod 4 moves in contact with the groove plate 5, preventing the detection rod 4 from falling off from the detection hole 34 and improving the detection stability.

[0042] Embodiment 3: Tooth teeth 24 are provided on the groove wall of the track groove 21; a gear 46 is fixedly connected to one end of the detection rod 4 close to the bottom of the track groove 21; the gear 46 is in meshing transmission with the tooth teeth 24; the surface of the detection disk 45 in contact with the workpiece is set as a grinding surface 451.

[0043] In this embodiment, the tooth teeth 24 in one of the track grooves 21 are provided on the outer groove wall of the track groove 21, and the tooth teeth 24 in the other track groove 21 are provided on the inner groove wall of the track groove 21; the rotation directions of the two opposite detection rods 4 are opposite.

[0044] During the process of the conveyor belt 3 driving the detection rod 4 along the track groove 21, one end of the detection rod 4 inserted into the track groove 21 is fixedly connected with a gear 46. The gear 46 meshes with the teeth 24 in the track groove 21, so that the gear 46 will rotate, and one end of the detection rod 4 will also be affected by the depth of the track groove 21 to drive the detection rod 4 to move along the detection hole 34. In this way, the detection rod 4 in the detection hole 34 not only moves axially along the detection hole 34 but also rotates. In addition, the detection rod 4 will also move with the transmission of the conveyor belt 3. The other end of the detection rod 4 is inserted into the tubular fitting to realize the limit of the tubular fitting. The other end of the detection rod 4 will drive the detection disc 45 to rotate. During the rotation of the detection disc 45, it will drive the grinding surface 451 to grind the end of the tubular fitting, so that some burrs at the end of the tubular fitting are ground flat under the grinding, avoiding the influence of the existence of burrs on the accuracy of length detection, and the burrs at the end of the tubular fitting fall off under the grinding; In addition, since the teeth 24 of one track groove 21 are arranged on the outer groove wall, and the teeth 24 in the other track groove 21 are arranged on the inner groove wall of the track groove 21, the gears 46 in the two track grooves 21 rotate in opposite directions, so that the detection rods 4 in the two track grooves 21 rotate in opposite directions, and the two opposite detection discs 45 rotate in opposite directions, so as to improve the grinding effect of the detection disc 45 on the tubular fitting; The burrs claimed in this embodiment refer to slight burrs, and do not refer to and have the grinding intensity of the existing grinding machine. The grinding can be realized by the movement of the grinding surface 451 on the detection disc 45 and the tubular fitting, so as to improve the detection accuracy;

[0045] In this embodiment, the cross-section of the detection rod 4 and the cross-section of the detection hole 34 are both circular. The detection rod 4 rotates and moves axially in the detection hole 34. The movement mode of the detection rod 4 is divided into two independent parts. One movement mode is axial movement. The end of the detection rod 4 is attracted magnetically and approaches the bottom of the track groove 21, so that the detection rod 4 moves while keeping in contact with the groove plate 5. The groove plate 5 is inclined and circular, so that the detection rod 4 moves back and forth axially; Another movement mode of the detection rod 4 is rotation. The gear 46 at the end of the detection rod 4 meshes with the teeth 24 to drive the detection rod 4 to rotate. The width of the gear 24 is consistent with the depth of the track groove 21. Under the axial movement of the detection rod 4, the gear 24 at the end of the detection rod 4 keeps meshing with the teeth 24, so as to realize the axial movement and rotation of the detection rod 4;

[0046] On the outer wall of the other end of the detection rod 4 in this embodiment, a micro electric telescopic mechanism 7 is also symmetrically arranged. During the process of the two opposite detection rods 4 moving forward, the micro electric telescopic mechanisms 7 on the two opposite detection rods 4 are alternately enabled to ensure that one detection rod 4 is responsible for clamping and the detection disc 45 on the other detection rod is responsible for grinding;

[0047] In this embodiment, in combination with the Figure 10It can be seen that one end of the detection rod 4 is an end fixedly connected to the gear 46, and the other end is an end away from the gear 46. The arc-shaped outer wall of the detection rod 4 and the position away from the gear 46 are symmetrically embedded with a micro-electric telescopic mechanism 7, and the micro-electric telescopic mechanism 7 is staggered with the detection slot 41 on the detection rod 4.

[0048] In this embodiment, during the movement of two relative detection rods 4 from front to back, the two symmetrical micro-electric telescopic mechanisms 7 on one of the detection rods 4 are extended to clamp the inner wall of the workpiece, and the micro-electric telescopic mechanism 7 on the other detection rod 4 is shortened to release the clamping of the inner wall of the workpiece, so that the detection rod 4 that is not clamped on the workpiece will drive the detection plate 45 to produce friction with the end of the workpiece to achieve grinding, so as to improve the grinding effect. The micro-electric telescopic mechanism 7 is alternately activated, which means that the micro-electric telescopic mechanism 7 on one of the detection rods 4 is extended, and the micro-electric telescopic mechanism 7 on the other detection rod 4 is shortened, and the micro-electric telescopic mechanisms 7 on the two detection rods 4 are alternately extended and shortened; the end of the detection rod 4 where the micro-electric telescopic mechanism 7 is set refers to the end of the detection rod 4 inserted into the inner side of the workpiece.

[0049] Embodiment 4: A limit plate 6 is provided at the upper position between the two detection seats 2; a guide plate 61 is provided at each end of the limit plate 6; the limit plate 6 is fixedly connected to the detection seat 2 via an L-shaped block 62; the detection disk 45 on the outer wall of the detection rod 4 can enter the inner side of the limit plate 6 under the guidance of the guide plate 61; the limit plate 6 is arranged close to the corresponding conveyor belt 3.

[0050] In this embodiment, a cleaning brush 63 is provided on one side of the two limiting plates 6 which are away from each other.

[0051] The limit plate 6 and the guide plate 61 at the end are located at the upper position between the two detection seats 2 and are arranged close to the corresponding conveyor belt 3. As the detection rod 4 is driven by the conveyor belt 3, the lower detection rod 4 will drive the detection disc 45 to polish the end of the tubular fitting. After the lower detection rod 4 moves to the rear position, it turns towards the upper detection rod 4. The upper detection rod 4 will drive the detection disc 45 on the outer wall to enter the inside of the limit plate 6 along the guide plate 61. During the forward movement of the upper detection rod 4, it will rotate and drive the detection disc 45 to rotate. During the rotation of the detection disc 45, it contacts the cleaning brush 63 inside the limit plate 6. The cleaning brush 63 can sweep off the impurities on the polishing surface 451 of the detection disc 45. The detection disc 45 on the upper detection rod 4 and the detection disc 45 on the lower detection rod 4 are staggered in the vertical direction, so the impurities swept off from the cleaning brush 63 will not fall onto the detection disc 45 on the lower detection rod 4 to avoid affecting the detection. Since the detection disc 45 on the upper detection rod 4 is restricted inside the limit plate 6, the other end of the upper detection rod 4 protrudes from the detection disc 45. Therefore, one end of the tubular fitting can be directly sleeved on the other end of one of the upper detection rods 4 during the feeding process. During the forward movement of the two opposite upper detection rods 4, the other end of the other upper detection rod 4 will also be inserted into the inner side of the end of the tubular fitting, so that both ends of the tubular fitting are inserted into the upper detection rods 4, realizing the rapid loading of the tubular fitting. After the upper detection rod 4 turns towards the lower detection rod 4, the detection disc 45 will move out from the inside of the limit plate 6 and abut against the end of the tubular fitting for the next length detection.

[0052] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the attached Figure 1 shown orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A linear dimension detection device for automobile tubular accessories, used to detect the length of automobile tubular accessories, comprising a detection frame and two detection seats symmetrically arranged on the detection frame; characterized in that: The two detection seats are close to each other and are transmission-connected to a conveyor belt with uniformly arranged detection holes; the transmission direction of the upper part of the conveyor belt is from back to front, and the transmission direction of the lower part of the conveyor belt is from front to back, and a detection rod is movably connected in the detection hole; the two detection seats are close to each other and are provided with a track groove corresponding to the conveyor belt and with the same shape; the depth of the track groove at the front end is less than the depth at the rear end; one end of the detection rod extends into the track groove; the outer wall of the detection rod is axially provided with a detection groove; the inside of the detection groove is fixedly connected to a pressure sensor near one end of the detection rod; the inside of the detection groove is slidably connected to a detection block near the other end of the detection rod; the detection block and the corresponding pressure sensor are connected by a spring; the outer wall of the other end of the detection rod is sleeved with a detection disk fixedly connected to the detection block; Two partitions are movable and adjustable under the detection seat; the space between the two partitions is the qualified area, and the other positions are the unqualified areas. The partition at the front position indicates the lower tolerance position of the length of the pipe fitting, and the partition at the rear position indicates the upper tolerance position of the length of the pipe fitting; A slot plate is provided inside the track slot and near the bottom of the slot; the slot plate has the same shape as the track slot and is smaller in width than the track slot; the inclination angle of the slot plate in the track slot is adjustable; One end of the detection rod close to the slot plate is magnetically attracted to the slot plate.

2. The linear dimension detection device for automobile pipe fittings according to claim 1, characterized in that: The upper surface of the detection frame moves left and right and adjusts the detection seat; the distance between the two detection seats is adjustable.

3. The linear dimension detection device for automobile pipe fittings according to claim 1, characterized in that: The groove wall of the track groove is provided with teeth; the end of the detection rod close to the bottom of the track groove is fixedly connected to a gear; the gear is meshed with the teeth for transmission; and the surface of the detection disk in contact with the workpiece is set as a polished surface.

4. The linear dimension detection device for automobile pipe fittings according to claim 3, characterized in that: The teeth in one of the track grooves are arranged on the outer groove wall of the track groove, and the teeth in the other track groove are arranged on the inner groove wall of the track groove; the two opposite detection rods rotate in opposite directions.

5. The linear dimension detection device for automobile pipe fittings according to claim 4, characterized in that: A limit plate is provided at the upper position between the two detection seats; guide plates are provided at the ends of the limit plate; the limit plate is fixedly connected to the detection seat through an L-shaped block; the detection disk on the outer wall of the detection rod can enter the inner side of the limit plate under the guidance of the guide plate; the limit plate is arranged close to the corresponding conveyor belt.

6. The linear dimension detection device for automobile pipe fittings according to claim 5, characterized in that: A cleaning brush is arranged on one side of the two limit plates which is away from each other.

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