Cylinder pin length detection device

Abstract

The application provides a cylindrical pin length detection device, which comprises a detection table, a hopper arranged above the detection table, a discharge port arranged at the lower end of the hopper, a detection roller arranged at the lower side of the hopper, a plurality of material receiving grooves arranged on the surface of the detection roller, a material control mechanism arranged between the hopper and the detection roller, and a material distribution mechanism arranged at the lower side of the detection roller. A material pushing detection mechanism is arranged at one side of the detection roller. The material falls into the material receiving groove on the detection roller, the material pushing detection mechanism pushes the cylindrical pin in the material receiving groove, the inner end of the cylindrical pin is abutted in place, the length of the cylindrical pin is detected according to the material pushing length of the material pushing detection mechanism, the length of the cylindrical pin is detected while the cylindrical pin is positioned, the accuracy of the cylindrical pin detection is improved, the structure is simple, the use is convenient, and the device is suitable for production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, and in particular to a cylindrical pin length detection device. BACKGROUND

[0002] Pins are generally used to connect, lock parts or as assembly positioning, and can also be used as parts of safety devices. In machinery, pins are mainly used for assembly positioning, and can also be used as overload shear connections in connection, loosening and safety devices. The types of pins include cylindrical pins, conical pins, hole pins, split pins and safety pins. Cylindrical pins are fixed in pin holes by a small amount of interference. Multiple assembly and disassembly can reduce the positioning accuracy. Conical pins have a taper of 1:50 and can be self-locked. They are fixed in pin holes by the extrusion of the taper, have high positioning accuracy and are convenient to install, and can be assembled and disassembled multiple times. Cylindrical pins are fixed in holes by interference, used to fix parts, transmit power, or as positioning members, so the length of the cylindrical pin is an important parameter that needs to be measured during use.

[0003] During use, its length is an important parameter that needs to be measured. At present, in order to ensure the qualified rate of cylindrical pins, manual detection is used in factories, and a caliper is used for individual detection, which is time-consuming and laborious, and has very low efficiency. Patent No. CN108655012B discloses an automatic detection device for the length of a cylindrical pin. The material is fed through a hopper, the material is sequentially dropped onto the measuring turntable through the distribution device, and sequentially falls into the V-shaped groove on the measuring turntable, and the length of the cylindrical pin is detected by the length sensor driven by the cylinder. After detection, cylindrical pins of different lengths are collected, thereby reducing manual operation and improving detection efficiency. However, when the cylindrical pin is discharged and falls into the V-shaped groove, the position of the cylindrical pin cannot be positioned and placed, which leads to inconsistencies in the discharge position of the cylindrical pin when the length sensor is used for detection, resulting in detection errors and affecting the detection effect of the cylindrical pin. Therefore, this problem needs to be solved. SUMMARY

[0004] The purpose of the present application is to provide a cylindrical pin length detection device. The material falls into the receiving groove on the detection roller, the top material detection mechanism pushes the cylindrical pin in the receiving groove, the inner end of the cylindrical pin is abutted in place, the length of the cylindrical pin is detected according to the length of the top material detection mechanism, and the problem of inaccurate detection results caused by the unfixed position of the cylindrical pin in the background technology is solved.

[0005] The present application provides a cylindrical pin length detection device, which comprises a detection table, a hopper is arranged above the detection table, a transparent acrylic material is used for the side edge baffle of the hopper, and observation is facilitated; a discharge port is arranged at the lower end of the hopper, a detection roller is arranged on the lower side of the hopper, a plurality of receiving grooves are arranged on the surface of the detection roller, a material control mechanism is arranged between the hopper and the detection roller, and a material distribution mechanism is arranged on the lower side of the detection roller; and a top material detection mechanism is arranged on one side of the detection roller.

[0006] Further improvement lies in that the material top detection mechanism comprises a detection seat, a detection rod, a detection head and a displacement sensor; the detection seat is movably arranged on the detection table through a sliding table air cylinder, the displacement sensor is arranged on the detection seat at an end far from the material detection roller, the detection rod is telescopically connected at a side close to the material detection roller of the displacement sensor, the detection head is arranged at an end close to the material detection roller of the detection seat, and the detection head is arranged in a flush manner with the material receiving groove on the upper side of the material detection roller, and the detection head is in contact with the end of the detection rod.

[0007] Further improvement lies in that a limiting block is arranged on the detection seat, the detection head is movably arranged on the limiting block, a spring is arranged at an end of the detection head, the spring is arranged at a side of the limiting block close to the material detection roller, a snap spring is arranged at the other end of the detection head, and the snap spring is arranged at a side of the limiting block far from the material detection roller; the detection head is provided with supporting force through the spring, and the detection head is reset through the spring, and the reset of the detection head is limited through the snap spring.

[0008] Further improvement lies in that limiting blocks are arranged at the two sides of the material detection roller, the limiting blocks are fixed on the reference plate through bolts, the limiting blocks limit the cylindrical pins in the material receiving groove when the material detection roller rotates, and the cylindrical pins are prevented from falling off in the process of rotation of the material detection roller; there are open gaps between the upper and lower ends of the limiting blocks on the two sides.

[0009] Further improvement lies in that a rotary air cylinder is arranged at the other end of the material detection roller, the output end of the rotary air cylinder is connected with the material detection roller, and the material detection roller is driven to rotate by the rotary air cylinder.

[0010] Further improvement lies in that the material distribution mechanism comprises a material distribution block, a material distribution air cylinder and a collection box; the collection box is arranged at the side of the detection table; the material distribution block is movably arranged on the surface of the detection table, the material distribution air cylinder is arranged at the side of the material distribution block and connected with the material distribution block, a material distribution groove is arranged on the material distribution block, a material falling hole is arranged on the detection table, and the material falling hole is arranged directly below the material detection roller; the material distribution groove and the material falling hole are adjusted in position through the material distribution air cylinder driving the material distribution block to move, so that the material is distributed.

[0011] Further improvement lies in that the collection box comprises a qualified box and an unqualified box; the qualified box and the unqualified box are arranged in a vertical manner, the side of the material distribution block is in a slope structure, the qualified material slides into the qualified box from the material distribution block along the slope, and a guide plate is arranged between the lower side of the material falling hole and the unqualified box, and the unqualified material falls onto the guide plate from the material falling hole and slides into the unqualified box.

[0012] Further improvement lies in that the material control mechanism comprises an inlet plate, an inlet air cylinder and a material pushing block; the inlet plate is arranged between the hopper and the material detection roller, the inlet air cylinder is arranged at the side of the inlet plate and connected with the inlet plate, the inlet air cylinder drives the inlet plate to move, the inlet plate is provided with an inlet, and the material pushing block is arranged at one side of the inlet plate.

[0013] Further improvement lies in that the cross section of the poking block is trapezoidal structure, and the inner side of the poking block is inclined surface, which facilitates the insertion of the poking block from the bottom of the hopper for poking.

[0014] The application has the following beneficial effects: 1. The application sets a material lifting detection mechanism to replace the existing direct induction detection. The position of the cylindrical pin is not fixed during the material lifting detection, which may cause detection effect difference and affect the accuracy of the detection result. The application sets a material lifting detection mechanism to position and detect the cylindrical pin, so that the position of the cylindrical pin is fixed during detection, thereby improving the cylindrical pin length detection effect and making the detection structure more accurate.

[0015] 2. The application sets a detection seat, which is driven to move by a sliding table air cylinder. The detection head contacts the end of the cylindrical pin to be detected and pushes the cylindrical pin to move in the receiving groove, so that the cylindrical pin abuts against the inner side of the receiving groove, thereby keeping the consistency of the position of the cylindrical pin during detection. The detection head and the detection rod are connected in an extension type structure and are extended or retracted during the pushing process according to the length of the cylindrical pin. The displacement sensor detects the change of the position distance of the detection head, thereby quickly detecting the length of the cylindrical pin and effectively improving the accuracy of the cylindrical pin length detection.

[0016] 3. The application sets a spring on the detection head, and a limiting block limits the spring to provide a counterforce to the spring, so that the spring provides a supporting force to the detection head when the detection head lifts the cylindrical pin, thereby making the lifting of the detection head more stable. After the detection is completed, the detection head is easily pushed out to reset. The snap spring limits the extension and reset of the detection head, so that the detection head remains stable.

[0017] 4. The application sets an inlet plate, which is driven to move by an inlet air cylinder. The inlet of the inlet plate is overlapped with the discharge port of the hopper and the receiving groove on the detection roller during the moving process, so that the feeding of the cylindrical pin is completed during the staggered butt joint process, thereby making the feeding more stable and orderly. The inlet plate is provided with a trapezoidal structure poking block. During the moving process of the inlet plate, the poking block extends into the hopper through the opening on the hopper to stir the cylindrical pins accumulated in the hopper, thereby preventing the cylindrical pins from being stuck during subsequent feeding and making the feeding more stable.

[0018] 5. The application sets a distribution block to classify and collect the detected cylindrical pins. The distribution air cylinder drives the distribution block to move according to the detection result. When the detection is qualified, the distribution block does not move, and the cylindrical pins roll down to the qualified box for collection along the slope of the distribution block. When the detection is unqualified, the distribution air cylinder drives the distribution block to move, so that the distribution groove moves to the position directly below the detection roller and is overlapped with the discharge hole. The cylindrical pins fall onto the guide plate through the distribution groove and the discharge hole in turn and roll down to the unqualified box for collection along the guide plate, thereby reducing manual operation and improving the detection and classification collection efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the inspection roller structure.

[0021] Figure 3 This is a schematic diagram of the top material detection mechanism.

[0022] Figure 4 This is a schematic diagram of the hopper structure.

[0023] Figure 5 This is a schematic diagram of the material control mechanism.

[0024] Figure 6 This is a schematic diagram of the material distribution mechanism.

[0025] Figure 7 This is a schematic diagram of the material distribution block structure.

[0026] The components are: 1-Detection table, 2-Hopper, 3-Detection roller, 4-Receiving groove, 5-Feed inlet, 6-Detection seat, 7-Detection rod, 8-Detection head, 9-Displacement sensor, 10-Slide cylinder, 11-Limit block, 12-Spring, 13-Limiting block, 14-Rotating cylinder, 15-Dividing block, 16-Dividing cylinder, 17-Dividing groove, 18-Discharge hole, 19-Qualified box, 20-Unqualified box, 21-Guide plate, 22-Feeding plate, 23-Feeding cylinder, 24-Pulling block, 25-Snap ring. Detailed Implementation

[0027] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0028] like Figures 1-7As shown, the embodiment provides a cylindrical pin length detection device, which comprises a detection table 1, a hopper 2 is arranged above the detection table 1, the side baffle of the hopper 2 is made of transparent acrylic plate, a discharge port is arranged at the lower end of the hopper 2, a detection roller 3 is arranged at the lower side of the hopper 2, at least two material receiving grooves 4 are arranged on the surface of the detection roller 3, the material receiving grooves 4 are symmetrically arranged at both ends of the detection roller, the cylindrical pin falls into the material receiving groove 4 of the detection roller 3 from the hopper 2, a material control mechanism is arranged between the hopper 2 and the detection roller 3, the material control mechanism comprises a feeding plate 22, a feeding cylinder 23 and a material pushing block 24; the feeding plate 22 is arranged between the hopper 2 and the detection roller 3, the feeding cylinder 23 is arranged at the side of the feeding plate 22 and connected with the feeding plate 22, a feeding port 5 is arranged on the feeding plate 22, the material pushing block 24 is arranged on one side of the feeding plate 22, an opening is arranged at the side of the hopper 2 corresponding to the material pushing block 24, and the cross section of the material pushing block 24 is in trapezoidal structure. The feeding cylinder 23 drives the feeding plate 22 to move, so that the feeding port 5 on the feeding plate 22 coincides with the discharge port of the hopper 2, and the cylindrical pin in the hopper 2 falls into the feeding port 5; then the feeding cylinder 23 drives the feeding plate 22 to retreat, so that the feeding port 5 coincides with the material receiving groove 4 on the upper side of the detection roller 3, the cylindrical pin in the feeding port 5 falls into the material receiving groove 4, and at the same time, the material pushing plate 24 extends into the hopper 2 from the opening at the side of the hopper 2, the material pushing block 24 pushes the accumulated cylindrical pin, prevents the cylindrical pin from being stuck during subsequent feeding, and makes the feeding of the cylindrical pin more stable and smooth.

[0029] The top material detection mechanism comprises a detection seat 6, a detection rod 7, a detection head 8 and a displacement sensor 9; the detection seat 6 is movably arranged on the detection table 1 by a sliding table air cylinder 10, the displacement sensor 9 is arranged on the detection seat 6 away from one end of the material detection roller 3, the detection rod 7 is telescopically connected to the displacement sensor 9 on the side close to the material detection roller 3, the detection rod 7 and the displacement sensor 9 adopt a cylinder and piston rod structure, the detection rod 7 is contracted into the displacement sensor 9 under the action of pressure, and the detection rod 7 automatically extends out of the displacement sensor 9 after the pressure disappears; the detection head 8 is arranged on the detection seat close to the material detection roller 3, the detection head 8 is arranged in the same plane with the upper material receiving groove 4 of the material detection roller 3, and the detection head 8 is in contact with the end of the detection rod 7. The detection seat 6 is provided with a limiting block 11, the detection head 8 is movably arranged on the limiting block 11, one end of the detection head 8 is sleeved with a spring 12, the spring 12 is arranged on the limiting block 11 close to the material detection roller 3, and the other end of the detection head 8 is provided with a clamping spring 25, the clamping spring 25 is arranged on the limiting block 11 away from the material detection roller 3. The detection seat 6 is moved by the sliding table air cylinder 10, the detection head 8 approaches the material detection roller 3, the detection head 8 is in contact with the end of the cylindrical pin during movement, and the cylindrical pin is moved in the material receiving groove 4, when the cylindrical pin is moved to the position and the detection seat 6 is moved to the set position, the detection head 8 is moved according to the reverse thrust provided by the cylindrical pin when it is moved to the position, the detection head 8 pushes the detection rod 7 to move into the displacement sensor 9, so that the displacement sensor 9 detects the change of the position distance of the detection head 8 caused by the contraction, and the length of the cylindrical pin is determined; the spring 12 provides support force for the detection head 8, so that the detection head 8 can stably push the cylindrical pin to move, and when the detection is completed, the detection head 8 is extended and reset by the pushing force generated by the spring 12 when it is expanded, and the clamping spring 25 limits the detection head 8 which is reset to prevent the detection head 8 from falling off.

[0030] The other end of the material detection roller 3 is provided with a rotary air cylinder 14, the output end of the rotary air cylinder 14 is connected with the material detection roller 3, after the detection of the cylindrical pin in the upper material receiving groove 4 is completed, the rotary air cylinder 14 drives the material detection roller 3 to rotate, so that the positions of the upper and lower material receiving grooves 4 are exchanged, the two sides of the material detection roller 3 are provided with material limiting blocks 13, the material limiting blocks 13 limit the cylindrical pin in the material receiving groove 4 when the material detection roller 3 rotates, so as to prevent the cylindrical pin from falling off during the rotation of the material detection roller 3, improve the stability of the cylindrical pin during the discharging process, and there is an opening gap between the upper and lower ends of the two material limiting blocks 13, the cylindrical pin falls into the material receiving groove 4 through the upper opening gap for feeding, and the cylindrical pin is separated from the material receiving groove 4 through the lower opening gap for discharging.

[0031] The lower side of the detecting roller 3 is provided with a distributing mechanism, which comprises a distributing block 15, a distributing cylinder 16 and a collecting box. The distributing block 15 is movably arranged on the surface of the detecting table 1, the distributing cylinder 16 is arranged on the side of the distributing block 15 and connected with the distributing block 15, the distributing block 15 is provided with a distributing groove 17, the detecting table 1 is provided with a discharging hole 18, and the collecting box is arranged on the side of the detecting table 1. The collecting box comprises a qualified box 19 and an unqualified box 20, which are arranged in an up-down manner. The side of the distributing block 15 is a slope structure, and a guide plate 21 is arranged between the lower side of the discharging hole 18 and the unqualified box 20. When the detecting of the cylindrical pin is completed, the detecting roller 3 rotates from the upper side to the lower side to discharge the cylindrical pin. When the size of the cylindrical pin is qualified, the cylindrical pin falls from the receiving groove 4 to the distributing block 15, rolls along the slope surface of the distributing block to the qualified box 19 for collection. When the size of the cylindrical pin is unqualified, the distributing cylinder 16 drives the distributing block 15 to move while the rotating cylinder 14 drives the detecting roller 3 to rotate, so that the distributing groove 17 on the distributing block 15 is right below the detecting roller 3 and aligns with the position of the lower receiving groove 4 when the detecting roller 3 rotates to the position, and at the same time, the distributing groove 17 aligns with the discharging hole 18 on the detecting table 1, so that the unqualified cylindrical pin falls from the receiving groove 4, sequentially passes through the distributing groove 17 and the discharging hole 18 and falls on the guide plate 21, and then rolls on the guide plate 21 to the unqualified box for collection, thereby completing the detecting and distributing collection.

[0032] In actual production, the cylindrical pins are stacked in the hopper 2, the feeding cylinder 23 drives the feeding plate to move, when the feeding port 5 on the feeding plate 22 coincides with the discharge port at the lower end of the hopper, the cylindrical pins fall into the feeding port 5, at this time the feeding cylinder 23 drives the feeding plate 22 to retreat, the feeding plate 22 drives the poking block 24 to move, the poking block 24 inserts into the hopper 2 from the opening of the hopper 2, and the poking block 24 pokes the stacked cylindrical pins to prevent the cylindrical pins from being stuck when subsequent feeding; the feeding plate 22 retreats, so that the feeding port 5 coincides with the receiving groove 4 at the upper end of the detection roller 3, and the cylindrical pins fall into the receiving groove 4; the sliding table cylinder 10 drives the detection seat 6 to move to detect the cylindrical pins, with the movement of the detection seat 6, the detection head 8 contacts the outer end of the cylindrical pin, and gradually pushes the cylindrical pin into the receiving groove 4, so that the inner end of the cylindrical pin abuts against the inner side of the receiving groove 4, and the spring 12 provides support force for the detection head 8, so that the detection head 8 pushes the cylindrical pin more stably. When the detection seat 6 moves to the limited position, if the cylindrical pin is too long, the cylindrical pin generates a reverse pushing force on the detection head 8, so that the detection head 8 pushes the detection rod 7 to retract towards the displacement sensor 9, and the spring 12 is compressed towards the limiting block 11; if the cylindrical pin is too short, the detection head 8 abuts against the end of the cylindrical pin, and the cylindrical pin does not generate a reverse pushing force, so that the detection head 8 moves; the displacement sensor 9 detects the position change of the detection rod 7 pushed by the detection head 8, so as to determine whether the length of the cylindrical pin is qualified. After detection, the sliding table cylinder 10 drives the detection seat 6 to retreat, the spring 12 pushes the detection head 8 to reset, the clamping spring 25 limits the reset of the detection head 8, the detection rod 7 extends from the displacement sensor 9 and contacts the detection head 8; at the same time, the rotary cylinder 14 drives the detection roller 3 to rotate to discharge, the limiting block 13 limits the cylindrical pin from the side to prevent the cylindrical pin from falling from the receiving groove 4 in the rotating process. When the cylindrical pin is qualified, the rotary cylinder 14 drives the detection roller 3 to rotate by 180 degrees, at this time the distribution cylinder 16 does not move, and the cylindrical pin directly falls on the distribution block 15, rolls along the inclined surface of the distribution block 15 and falls into the qualified box 19 for collection; when the cylindrical pin is unqualified, the distribution cylinder 16 drives the distribution block 15 to move when the rotary cylinder 14 rotates, so that the distribution groove 17 moves to the position directly below the detection roller 3 and coincides with the discharge hole 18 at the lower side, the cylindrical pin falls into the guide plate 21 through the distribution groove 17 and the discharge hole 18 in turn, and rolls along the guide plate 21 and falls into the unqualified box 20 for collection, so as to complete the detection and distribution of the cylindrical pins, improve the detection efficiency and effect, and improve the production efficiency.

Claims

1. A cylindrical pin length detection device, comprising a detection table (1), a hopper (2) is arranged above the detection table (1), a discharge port is arranged at the lower end of the hopper (2), a detection roller (3) is arranged at the lower side of the hopper (2), and a plurality of material receiving grooves (4) are arranged on the surface of the detection roller (3); characterized in that: A control mechanism is arranged between the hopper (2) and the detecting roller (3), a distributing mechanism is arranged at the lower side of the detecting roller (3), and a top material detecting mechanism is arranged at one end of the detecting roller (3). The top material detecting mechanism comprises a detecting seat (6), a detecting rod (7), a detecting head (8) and a displacement sensor (9). The detecting seat (6) is movably arranged on the detecting table (1) through a sliding table air cylinder (10). The displacement sensor (9) is arranged at one end of the detecting seat (6) away from the detecting roller (3). The detecting rod (7) is telescopically connected at the side of the displacement sensor (9) close to the detecting roller (3). The detecting head (8) is arranged at one end of the detecting seat close to the detecting roller (3). The detecting head (8) is arranged in a flush manner with the material receiving groove (4) at the upper side of the detecting roller (3). The detecting head (8) is in contact with the end of the detecting rod (7). The distributing mechanism comprises a distributing block (15), a distributing air cylinder (16) and a collecting box. The collecting box is arranged at the side of the detecting table (1). The distributing block (15) is movably arranged on the surface of the detecting table (1). The distributing air cylinder (16) is arranged at the side of the distributing block (15) and connected with the distributing block (15). The distributing block (15) is provided with a distributing groove (17). The detecting table (1) is provided with a material falling hole (18). The control mechanism comprises an inlet plate (22), an inlet air cylinder (23) and a material shifting block (24). The inlet plate (22) is arranged between the hopper (2) and the detecting roller (3). The inlet air cylinder (23) is arranged at the side of the inlet plate (22) and connected with the inlet plate (22). The inlet air cylinder (23) drives the inlet plate (22) to move. The inlet plate (22) is provided with an inlet (5). The material shifting block (24) is arranged at one side of the inlet plate (22). The side of the hopper (2) is provided with an opening corresponding to the material shifting block (24).

2. The cylindrical pin length detection apparatus of claim 1, wherein: A limiting block (11) is arranged on the detecting seat (6). The detecting head (8) is movably arranged on the limiting block (11). One end of the detecting head (8) is sleeved with a spring (12). The spring (12) is arranged at the side of the limiting block (11) close to the detecting roller (3). The other end of the detecting head (8) is provided with a clamping spring (25). The clamping spring (25) is arranged at the side of the limiting block (11) away from the detecting roller (3).

3. The cylindrical pin length detection apparatus of claim 1, wherein: Material stopping blocks (13) are symmetrically arranged at the two sides of the detecting roller (3). The material stopping blocks (13) stop the cylindrical pins in the material receiving groove (4) when the detecting roller (3) rotates.

4. The cylindrical pin length detection apparatus of claim 1, wherein: The other end of the detecting roller (3) is provided with a rotating air cylinder (14). The output end of the rotating air cylinder (14) is connected with the detecting roller (3). The rotating air cylinder (14) drives the detecting roller (3) to rotate.

5. The cylindrical pin length detection apparatus of claim 1, wherein: The collecting box comprises a qualified box (19) and an unqualified box (20). The qualified box (19) and the unqualified box (20) are arranged in an up-down manner. The side of the distributing block (15) is in a slope structure. A material guide plate (21) is arranged between the lower side of the material falling hole (18) and the unqualified box (20).

6. The cylindrical pin length detection apparatus of claim 1, wherein: The cross section of the material shifting block (24) is in a trapezoidal structure.

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