Screw detection mechanism

Abstract

A screw detection mechanism disclosed by the present invention comprises a vertical frame, a material storage block, a first material channel, a second material channel, a one-by-one discharging assembly, a detection assembly and a material distribution assembly, the material storage block is arranged on the vertical frame, a through material guide groove is formed in the material storage block, one end of the material guide groove is connected with a discharge port of a vibration disc, and the other end of the material guide groove is connected with the first material channel; the discharging end of the first material channel is arranged in the feeding end of the second material channel, and the first material channel does not make contact with the second material channel. The first material channel and the second material channel are obliquely arranged; the one-by-one discharging assembly is arranged on the storage block, screws are fed into the first material channel one by one through the one-by-one discharging assembly, the detection assembly is arranged at the second material channel, and the lengths of the screws are detected through the detection assembly; the material distributing assembly is arranged at the discharging end of the second material channel and used for storing the screws in a classified mode according to the detection result of the detection assembly. The first material channel and the second material channel are in non-contact connection, a feeding part and a detection part are separated, false detection is effectively avoided, and the reliability of a detection result is improved.

Description

Technical Field

[0001] The present invention relates to the field of screw production, and in particular to a screw detection mechanism. Background Art

[0002] During the production process, screws may not meet the length requirements. Therefore, before leaving the factory, the screws need to be tested for length to check whether they are within the qualified error range.

[0003] Chinese patent CN111006596B discloses a screw inspection device that uses a sensor to detect the lower limit of the screw length and a physical support to detect the upper limit of the length. However, since the screw moves on the transmission mechanism by vibrating the vibrator, the screw will also vibrate. Therefore, even if the upper and lower limits of the length are set, the amplitude may cause false detection of the screw. Summary of the Invention

[0004] In view of the defects of the above-mentioned prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art and discloses a screw detection mechanism, including a stand, a material storage block, a first material channel, a second material channel, a material discharge component, a detection component and a material dividing component, the material storage block is arranged on the stand, a material guide trough is arranged on the material storage block, one end of the material guide trough is connected to the discharge port of the vibrating plate, and the other end is connected to the first material channel, the discharge end of the first material channel is placed in the feed end of the second material channel, and the first material channel does not contact the second material channel; the first material channel and the second material channel are arranged at an angle; the material storage block is provided with an installation groove connected to the material guide trough, the material discharge component is arranged in the installation groove, and the screws in the material guide trough are fed into the first material channel one by one by the material discharge component, the detection component is arranged at the second material channel, and the detection component is used to detect the length of the screws; the material dividing component is arranged at the discharge end of the second material channel, and the screws are stored in a classified manner according to the detection result of the detection component.

[0005] Furthermore, the one-by-one material discharge assembly includes a driving rod, a slider, a guide rail, a first actuator and a one-way pin, the slider is slidably arranged on the material storage block through the guide rail, the driving rod is rotatably arranged on the slider through a torsion spring, and rotates within a limited range, the torsion spring is used to provide a restoring force for the driving rod, the first actuator is connected to the slider, and the first actuator is used to drive the slider to reciprocate along the guide rail, the one-way pin is set on the material storage block, and a channel is formed between the one-way pin and the inner wall of the mounting groove to allow the driving rod to pass in one direction; when in use, the first actuator drives the slider to drive the driving rod to move toward the discharging end, and the driving rod is used to push the screw in the guide trough to move toward the discharging end. When the driving rod is reset, the driving rod is blocked by the one-way pin and rotates counterclockwise. When the driving rod passes through the one-way pin, it is rotated clockwise by the restoring force of the torsion spring and then resets.

[0006] Furthermore, a guide portion is provided in the installation slot, and the guide portion extends to between the last two screws.

[0007] Furthermore, a limit block is provided on the sliding block, and the limit block is used to limit excessive rotation of the driving rod.

[0008] Furthermore, the one-way pin includes a fixed seat, a spring and a pin, a guide groove and a spring cavity are provided on the fixed seat, the spring is provided in the spring cavity, the pin is slidably provided in the guide groove, the spring is utilized to provide an axial outward thrust for the pin, and a chamfer is provided on one side of the end of the pin.

[0009] Furthermore, the detection component includes an adjustment component, two groups of sensors and a material blocking component. The material blocking component is arranged at the discharge end of the second material channel. An opening is arranged on the side wall of the second material channel. The sensor is arranged on the outer wall of the second material channel through the adjustment component, and the sensor is used to sense the screw.

[0010] Furthermore, the adjustment assembly includes an adjustment rod, an adjustment block and a locking screw. The adjustment rod is parallel to the opening. The adjustment block is slidably arranged on the adjustment rod. The locking screw is used to lock the adjustment block and the adjustment rod.

[0011] Furthermore, the material blocking assembly includes a cylinder and a blocking rod. A through hole is provided on the second material channel. The blocking rod is slidably provided in the through hole. The cylinder is used to drive the blocking rod to extend into and move out of the second material channel.

[0012] Furthermore, a V-shaped chute is provided at the bottom of the second material channel.

[0013] Furthermore, the material dividing assembly includes a material receiving channel and a first classification trough and a second classification trough connected to the material receiving channel. The first classification trough, the second classification trough and the material receiving channel are distributed in a Y shape. The first classification trough and the second classification trough are respectively connected to a qualified material box and an unqualified material box. A classification plate is rotatably arranged at the connection between the material receiving channel and the first classification trough and the second classification trough. The classification plate is connected to a servo motor, and the servo motor is used to drive the classification plate to connect the material receiving channel with the first classification trough or the second classification trough.

[0014] The beneficial effects achieved by the present invention are:

[0015] The present invention separates the feeding and detection sections by connecting the first and second material channels without contact, effectively avoiding false detections and improving the reliability of the test results. A separate discharge assembly is provided on the storage block to discharge screws individually. A one-way pin is added to prevent the screws in the guide trough from being affected by the reset of the drive rod, thus preventing the simultaneous feeding of multiple screws. The second material channel is configured as a V-shaped chute, which positions the screws to ensure they are in the detection position. The V-shaped chute also has a wide range of applications, suitable for a wide range of screw sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a screw detection mechanism of the present invention;

[0017] Figure 2 for Figure 1 A top view of

[0018] Figure 3 Schematic diagram of the structure of unloading components one by one

[0019] Figure 4 for Figure 1 Right view of;

[0020] Figure 5 for Figure 4 Middle AA section view;

[0021] Figure 6 Schematic diagram of the three-dimensional structure of the storage block;

[0022] Figure 7 It is the right view of the storage block;

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the second material channel, the adjustment component and the material blocking component;

[0024] Figure 9 for Figure 8 A schematic diagram of a three-dimensional structure from another perspective;

[0025] Figure 10Schematic diagram of the three-dimensional structure of the material separation component;

[0026] The reference numerals are as follows:

[0027] 1. Stand, 2. Storage block, 3. First material channel, 4. Second material channel, 5. Discharging assembly one by one, 6. Detection assembly, 7. Material dividing assembly, 21. Material guide trough, 22. Guide part, 23. Blocking part, 41. V-shaped slide 51. Drive rod, 52. Slider, 53. Guide rail, 54. First actuator, 55. One-way pin, 56. Limit block, 551. Fixed seat, 552. Spring, 553. Pin, 554. Chamfer, 62. Sensor, 63. Material stop assembly, 64. Adjustment assembly, 631. Cylinder, 632. Gear rod, 641. Adjustment rod, 642. Adjustment block, 643. Locking screw, 71. Material receiving channel, 72. First classification trough, 73. Second classification trough, 74. Classification plate, 75. Servo motor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] A screw detection mechanism, such as Figures 1-10 As shown, it includes a stand 1, a storage block 2, a first material channel 3, a second material channel 4, a material discharge assembly 5, a detection assembly 6 and a material distribution assembly 7. The storage block 2 is arranged on the stand 1. A guide trough 21 is provided on the storage block 2. One end of the guide trough 21 is connected to the discharge port of the vibration disk, and the other end is connected to the first material channel 3. A vibrator (not shown) is provided on the storage block 2 to drive the storage block 2 to vibrate and move the screw from one end of the guide trough 21 to the other end. The discharge end of the first material channel 3 is placed in the feed end of the second material channel 4, and the first material channel 3 does not contact the second material channel 4. Because the first material channel 3 is connected to the storage block 2, the vibration of the storage block 2 will be transmitted to the first material channel 3. By not contacting the first material channel 3 and the second material channel 4, the vibration of the first material channel 3 can be prevented from affecting the second material channel 4. The first material trough 3 and the second material channel 4 are arranged at an angle so that the screw can slide down smoothly. The storage block 2 is provided with a mounting slot connected to the guide chute 21. A discharging assembly 5 is positioned within the mounting slot. The discharging assembly 5 removes the screws from the guide chute 21 one by one and feeds them into the first material channel 3. A detection assembly 6 is positioned at the second material channel 4. After the screws enter the second material channel 4, the detection assembly 6 performs a length inspection. A sorting assembly 7 is positioned at the discharge end of the second material channel 4. The sorting assembly 7 sorts and stores the screws according to the inspection results of the detection assembly 6.

[0030] In one embodiment, if Figure 1-Figure 7As shown, the material discharge assembly 5 includes a drive rod 51, a slider 52, a guide rail 53, a first actuator 54 and a one-way pin 55. The slider 52 is slidably set on the storage block 2 through the guide rail 53. The drive rod 51 is rotatably set on the slider 52 through a torsion spring and rotates within a limited range. The torsion spring is used to provide a restoring force for the drive rod 51. The first actuator 54 is connected to the slider 52, and the first actuator 54 is used to drive the slider 52 to reciprocate along the guide rail 53. The one-way pin 55 is set on the storage block 2, and a channel is formed between the one-way pin 55 and the inner wall of the installation groove to allow the drive rod 51 to pass in one direction; when in use, the first actuator 54 drives the slider 52 to drive the drive rod 51 to move toward the discharge end, and the drive rod 51 is used to push the screw in the guide trough 21 to move toward the discharge end, and the drive rod 51 passes through the one-way pin 55. When the drive rod 51 is reset, the one-way pin 55 blocks the drive rod 51 from rotating counterclockwise. After passing the one-way pin 55, the torsion spring's restoring force causes the drive rod 51 to rotate clockwise and reset. The one-way pin 55 is positioned to correspond to the last screw, preventing the drive rod 51 from interfering with the screw during reset. The first actuator 54 is a pneumatic cylinder.

[0031] In one embodiment, if Figure 1-Figure 7 As shown, a guide portion 22 is provided within the mounting slot, extending between the last two screws. The rotational trajectory of the drive rod 51 is a curve. When the drive rod 51 passes the one-way pin 55 during the reset process, the drive rod 51 rotates clockwise due to the restoring force of the torsion spring, acting on the guide portion 22. When the first actuator 54 drives the slider 52 to the right, the drive rod 51 moves rightward along the guide portion 22, as the drive portion 22 extends between the last two screws. When the drive rod 51 separates from the guide portion 22, it guides the drive rod 51 to insert between the two screws, thereby allowing the drive rod 51 to drive one screw out of the guide slot 21. The guide portion 22 is flat, and the edge of the guide portion 22 cooperates with the side wall of the drive rod 51 to support the drive rod 51 and enable it to be inserted between the last two screws.

[0032] In one embodiment, if Figure 1-Figure 7 As shown, a limit block 56 is provided on the slider 52 to limit excessive rotation of the driving rod 51 .

[0033] In one embodiment, if Figure 1-Figure 7As shown, the one-way pin 55 comprises a mounting base 551, a spring 552, and a pin 553. The mounting base 551 is provided with a guide groove and a spring cavity. The spring 552 is positioned within the spring cavity, and the pin 553 slides within the guide groove. The spring 552 provides an axial outward thrust to the pin 553. The end of the pin 553 is chamfered on one side. When the drive rod 51 moves from left to right, it contacts the chamfer 554 of the pin 553, causing the pin 554 to move axially downward, disappearing into the mounting base 551. Simultaneously, the spring 552 accumulates force. When the drive rod 51 separates from the pin 554, the pin 554 is reset by the restoring force of the spring 552. When the drive rod 51 moves from right to left, because the other side of the pin 554 lacks a chamfer, the pin 554 blocks the drive rod 51, allowing the drive rod 51 to rotate counterclockwise to pass the one-way pin 55.

[0034] In one embodiment, if Figure 1 、 Figure 8 、 Figure 9 As shown, the detection assembly 6 includes an adjustment assembly 64, two sets of sensors 62, and a material stop assembly 63. The material stop assembly 63 is set at the discharge end of the second material channel 4. An opening is set on the side wall of the second material channel 4. The sensor 62 is set on the outer wall of the second material channel 4 through the adjustment assembly 64, and the sensor 62 is used to sense the screw. The two sets of sensors 62 are respectively set to sense the shortest and longest screw lengths. If the screw is within the qualified range, only the shortest sensor 62 will sense the signal, while the longest sensor 62 will not sense the signal.

[0035] In one embodiment, if Figure 1 、 Figure 8 、 Figure 9 As shown, the adjustment assembly 64 includes an adjustment rod 641, an adjustment block 642, and a locking screw 643. The adjustment rod 641 is parallel to the opening, and the adjustment block 642 is slidably mounted on the adjustment rod 641. The adjustment block 642 is locked to the adjustment rod 641 using the locking screw 643. This structure enables rapid adjustment of the sensor 62. The adjustment rod 641 is a long round rod, a triangular rod, or a polygonal rod.

[0036] In one embodiment, if Figure 1 、 Figure 8 、 Figure 9 As shown, the material blocking assembly 63 includes a cylinder 631 and a gear rod 632. A through hole is provided on the second material channel 4. The gear rod 632 is slidably provided in the through hole. The cylinder 631 is used to drive the gear rod to extend into and out of the second material channel 4. Preferably, the through hole is provided at the bottom of the second material channel 4.

[0037] In one embodiment, if Figure 1 、 Figure 8 、 Figure 9As shown, a V-shaped chute 41 is provided at the bottom of the second material channel 4. The screw is positioned by the V-shaped chute 41 to ensure that the screw is in the detection position.

[0038] In one embodiment, if Figure 1 and Figure 10 As shown, the material dividing assembly 7 includes a material receiving channel 71 and a first classification trough 72 and a second classification trough 73 connected to the material receiving channel 71. The first classification trough 72, the second classification trough 73 and the material receiving channel 71 are distributed in a Y shape. The first classification trough 72 and the second classification trough 73 are respectively connected to the qualified material box and the unqualified material box. A classification plate 74 is rotatably arranged at the connection between the material receiving channel 71 and the first classification trough 72 and the second classification trough 73. The classification plate 74 is connected to the servo motor 75. The servo motor 75 is used to drive the classification plate 74 to connect the material receiving channel with the first classification trough 72 or the second classification trough 73.

[0039] In the above embodiment, if Figure 1 and Figure 10 As shown, a blocking portion 23 is provided at the discharge end of the guide trough 21, which blocks the screw from sliding out of the guide trough 21. The blocking portion 23 is a spring.

[0040] In the above embodiment, if Figure 1 and Figure 10 As shown, the second channel 4 only allows a single screw to pass through.

[0041] When the present invention is used, Figures 1-10 As shown, the screws are arranged and fed into the guide trough 21 via a vibrating plate. The screws are blocked by the blocking portion 23 and arranged sequentially within the guide trough 11. The one-way pin 55 is fixed to the storage block, and its position corresponds to the point where the last screw stops. Therefore, the first actuator 54 drives the slider 52 to move leftward past the one-way pin 55. Because the one-way pin 4 can only pass from left to right, the one-way pin 55 blocks the drive rod 51, causing it to rotate. When the drive rod 51 no longer contacts the pin 553 of the one-way pin 55, it is driven by the restoring force of the torsion spring to rotate in the opposite direction and act on the guide portion 22. The slider 52 is driven in the opposite direction, and the drive rod 51 follows the edge of the guide portion 22, gradually inserting itself between the last two screws. The drive rod 51 is then driven rightward, moving the last screw toward the outlet. During this process, the pin 553 of the one-way pin 55 contracts inward, allowing the drive rod 51 to pass through the one-way pin 55. At this point, the unloading of one screw is completed. The screw slides along the first material channel 3 into the second material channel 4. The material stop assembly 63 closes the outlet of the second material channel 4. The bottom of the screw contacts the stop rod 632, and the sensor 62 collects signals. The sensor 62 then controls the guide position of the sorting plate 74 of the material distribution assembly 7 based on the detection results. The material stop assembly 63 is then opened, and the screw falls along the powder assembly 7 into the corresponding material box.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced with equivalents without departing from the spirit and scope of the present invention, they should be included in the scope of protection of the claims of the present invention.

Claims

1. A screw detection mechanism, characterized in that: It comprises a stand, a material storage block, a first material channel, a second material channel, a material discharge component, a detection component and a material dividing component, wherein the material storage block is arranged on the stand, a material guide trough is arranged on the material storage block, one end of the material guide trough is connected to the material discharge port of the vibration plate, and the other end is connected to the first material channel, the material discharge end of the first material channel is placed in the material feed end of the second material channel, and the first material channel does not contact the second material channel; the first material channel and the second material channel are arranged obliquely; a mounting groove connected to the material guide trough is arranged on the material storage block, the material discharge component is arranged in the mounting groove, the screws in the material guide trough are fed into the first material channel one by one by the material discharge component, the detection component is arranged at the second material channel, and the detection component is used to detect the length of the screws; the material dividing component is arranged at the material discharge end of the second material channel, and the screws are stored in a classified manner according to the detection result of the detection component; a blocking part is arranged at the material discharge end of the material guide trough, and the blocking part is used to limit the screws from sliding out of the material guide trough; The material discharging assembly comprises a driving rod, a slider, a guide rail, a first actuator and a one-way pin, the slider being slidably arranged on the material storage block through the guide rail, the driving rod being rotatably arranged on the slider through a torsion spring and rotating within a limited range, the torsion spring being used to provide a restoring force for the driving rod, the first actuator being connected to the slider, the slider being driven to reciprocate along the guide rail by the first actuator, the one-way pin being arranged on the material storage block, a channel being formed between the one-way pin and the inner wall of the mounting groove allowing the driving rod to pass in one direction; when in use, the first actuator drives the slider to drive the driving rod to move toward the material discharging end, the driving rod is used to push the screw in the material guide groove to move toward the material discharging end, when the driving rod is reset, the driving rod is blocked by the one-way pin and rotates counterclockwise, and when the driving rod passes through the one-way pin, it is rotated clockwise by the restoring force of the torsion spring and then resets; A V-shaped chute is arranged at the bottom of the second material channel.

2. A screw detection mechanism according to claim 1, characterized in that: A guide portion is arranged in the installation groove, and the guide portion extends to between the last two screws.

3. A screw detection mechanism according to claim 1, characterized in that: A limit block is arranged on the sliding block, and the limit block is utilized to limit excessive rotation of the driving rod.

4. A screw detection mechanism according to claim 1, characterized in that: The one-way pin includes a fixing seat, a spring and a pin. A guide groove and a spring cavity are arranged on the fixing seat. The spring is arranged in the spring cavity. The pin is slidably arranged in the guide groove. The spring is utilized to provide an axial outward thrust for the pin. A chamfer is arranged on one side of the end of the pin.

5. A screw detection mechanism according to claim 1, characterized in that: The detection component includes an adjustment component, two groups of sensors and a material blocking component. The material blocking component is arranged at the discharge end of the second material channel. An opening is arranged on the side wall of the second material channel. The sensor is arranged on the outer wall of the second material channel through the adjustment component, and the sensor is used to sense the screw.

6. A screw detection mechanism according to claim 5, characterized in that: The adjustment assembly comprises an adjustment rod, an adjustment block and a locking screw. The adjustment rod is parallel to the opening. The adjustment block is slidably arranged on the adjustment rod. The locking screw is used to lock the adjustment block and the adjustment rod.

7. A screw detection mechanism according to claim 1, characterized in that: The material blocking assembly includes a cylinder and a blocking rod. A through hole is arranged on the second material channel. The blocking rod is slidably arranged in the through hole. The cylinder is used to drive the blocking rod to extend into and move out of the second material channel.

8. A screw detection mechanism according to claim 1, characterized in that: The material dividing assembly includes a material receiving channel and a first classification trough and a second classification trough connected to the material receiving channel, the first classification trough, the second classification trough and the material receiving channel are distributed in a Y shape, the first classification trough and the second classification trough are respectively connected to a qualified material box and an unqualified material box, a classification plate is rotatably arranged at the connection between the material receiving channel and the first classification trough and the second classification trough, the classification plate is connected to a servo motor, and the servo motor is used to drive the classification plate to connect the material receiving channel with the first classification trough or the second classification trough.

Images