A screw cutting mechanism integrated with a long-short detection function

Abstract

The utility model provides a screw cutting mechanism with integrated long and short detection function, which comprises a cutting module, the cutting module comprises a base, a detection position is formed on the base, a limiting port and a detection port are formed on the detection position, the limiting port corresponds to the position of the detection port, a limiting module is arranged on the base and corresponds to the position of the detection port to apply pressure downward to prevent the screw from moving upward when the length of the screw is detected, a detection module is arranged on the base and corresponds to the detection port, the detection module comprises a telescopic mechanism, a telescopic rod and a detector, the telescopic mechanism is relatively static with the base, one end of the telescopic rod is connected with the telescopic mechanism, and the other end extends into the detection port, the telescopic rod selectively abuts against the lower end surface of the screw under the driving of the telescopic mechanism, and the detector detects the extension length of the screw. The cutting mechanism can accurately detect the length of the screw and automatically process the out-of-tolerance screw.

Description

Technical Field

[0001] This utility model relates to the field of tools for tightening fasteners, and specifically to a screw cutting mechanism that integrates length and shortness detection function. Background Technology

[0002] In the automotive and other parts assembly industries, automated screw tightening technology is gradually replacing traditional manual tightening methods due to its reliability, efficiency, and traceability, and is gaining increasingly widespread application.

[0003] During assembly, companies have strict requirements regarding the length of screws at each tightening position. If the screw size error exceeds the set value, it may cause tightening failure, or even lead to rework or scrapping of the assembled part. To solve the above problems, the screw length is usually checked before assembly and tightening. The existing method is generally manual sampling. This method has a small detection range and may miss screws exceeding the tolerance and enter the product, causing rework; or a sensor is added during the screw feeding process to detect the length. However, this method is greatly affected by the light environment, resulting in low detection accuracy and poor stability, and is prone to missed or incorrect detections. Utility Model Content

[0004] This invention provides a screw cutting mechanism with integrated length detection function. The cutting mechanism can accurately detect the length of the screw and automatically process screws that exceed the tolerance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A screw cutting mechanism integrating length detection function includes a cutting module, a limiting module, and a detection module. The cutting module includes a base with a detection position formed on the base for detecting the length of the screw. A limiting opening is formed at the top of the base, and a detection opening is formed at the bottom of the base. The limiting opening and the detection opening are positioned opposite each other. The limiting module is disposed on the base, and its position corresponds to the position of the detection opening, so as to apply downward pressure to prevent the screw from moving upward when its length is detected. The detection module is disposed on the base, and its position corresponds to the detection opening. The detection module includes a telescopic mechanism, a telescopic rod, and a detector. The telescopic mechanism is stationary relative to the base. One end of the telescopic rod is connected to the telescopic mechanism, and the other end extends into the detection opening. Driven by the telescopic mechanism, the telescopic rod can selectively abut against the lower end face of the screw. The detector detects the extension length of the screw.

[0006] Preferably, a sliding cavity is formed in the base, an inlet is formed on the side wall of the sliding cavity, an outlet is formed on the bottom plate of the sliding cavity, a limiting port is formed on the top plate of the sliding cavity, and a detection port is formed on the bottom plate of the sliding cavity.

[0007] Preferably, the cutting module further includes a cutting assembly, which includes a first driving mechanism, a push plate, a first slider, a second slider, and an elastic element. The first driving mechanism is disposed on the base, and the push plate, the first slider, and the second slider are disposed in the sliding cavity. The push plate is connected to the first driving mechanism and moves in the sliding cavity under the drive of the first driving mechanism. The first slider is fixedly connected to the push plate, and the second slider is connected to the push plate through the elastic element. A blocking element is also disposed on the base, which is used to prevent the second slider from continuing to move after sliding a set distance.

[0008] Preferably, a gap for storing screws is formed between the first slider and the second slider. When the screw enters the screw inlet, the gap corresponds to the position of the screw inlet, and the width of the gap is less than the width of the upper flange of the screw. When the gap moves to the screw outlet, the width of the gap is greater than the width of the upper flange of the screw.

[0009] Preferably, a limiting block is also provided in the sliding cavity. The limiting block is located on the side of the gap away from the second slider. When the position of the gap corresponds to the position of the nail outlet, the edge of the limiting block facing the gap is flush with the edge of the second slider facing the gap.

[0010] Preferably, the limiting module includes a second driving mechanism, a limiting pressure head, and an in-position sensor. The second driving mechanism is stationary relative to the base. The limiting pressure head is connected to the second driving mechanism and moves up and down under the drive of the second driving mechanism. When moving downward, the limiting pressure head extends into the limiting port and presses against the upper end face of the screw head. The in-position sensor is disposed on the base and detects whether the screw is located at the detection position.

[0011] Preferably, a through hole is provided on the limiting pressure head, and the position of the through hole corresponds to the position of the limiting port in the vertical direction. The in-situ sensor passes through the through hole to detect the screw in the limiting port.

[0012] Preferably, the detector is a light flux detector, which contains a light emitter and a light receiver. A light shield is provided on the telescopic rod and is positioned between the light flux detectors. When the telescopic rod extends or retracts, it moves the light shield, thereby changing the light flux in the light flux detector.

[0013] Preferably, the screw cutting mechanism integrating the length detection function further includes a distribution module. The distribution module includes a third drive mechanism and a distribution block. The third drive mechanism is stationary relative to the base. The distribution block is provided with a first feeding channel and a second feeding channel. The distribution block is connected to the third drive mechanism. The third drive mechanism drives the distribution block to move so that the first feeding channel or the second feeding channel can be connected to the screw outlet.

[0014] Preferably, the centerlines of the limiting port, the detection port, and the nail inlet are located on the same vertical plane.

[0015] Compared with the prior art, the beneficial effects of this utility model are: In summary, in this invention, the inclusion of a limiting module and a detection module allows the telescopic rod of the detection module to abut against the end face of the screw, and the insertion depth of the telescopic rod is detected by a detector to determine the screw length. Furthermore, by setting the detector as a light flux detector, changes in light flux can reflect the insertion length of the telescopic rod, making the detection results more accurate. Furthermore, the distribution module automatically removes defective screws, saving production time. Furthermore, the arrangement of the first slider, the second slider, and related components automatically adjusts the width of the gap accommodating the screws and prevents screws from getting caught on the first or second slider.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 The diagram shown is an axonal structural schematic of the screw cutting mechanism with integrated length and length detection function provided in an embodiment of this utility model.

[0018] Figure 2 As shown Figure 1 A first-person view of the front structure of a screw cutting mechanism that integrates length and length detection functions.

[0019] Figure 3As shown Figure 2 Schematic diagram of the cross-sectional structure in the middle III-III direction.

[0020] Figure 4 As shown Figure 1 A schematic diagram of the internal axonal structure of the cutting module.

[0021] Figure 5 As shown Figure 1 A frontal view of the screw cutting mechanism with integrated length and length detection function from a second perspective.

[0022] Figure 6 As shown Figure 4 Schematic diagram of the cross-sectional structure in the VI-VI direction.

[0023] Figure 7 As shown Figure 1 A schematic diagram of the isometric structure of the middle limit module.

[0024] Reference numerals: 10, Cutting module; 11, Base; 111, Nail inlet; 112, Nail outlet; 113, Limiting port; 114, Detection port; 115, Blocking element; 116, Limiting groove; 12, Cutting assembly; 121, First driving mechanism; 122, Push plate; 123, First slider; 124, Second slider; 1241, Limiting bolt; 125, Elastic element; 126, Limiting block; 13, Sliding cavity; 20, Limiting module; 21, Second driving mechanism; 22, Limiting pressure head; 23, In-situ sensor; 221, Through hole; 30, Detection module; 31, Telescopic mechanism; 32, Telescopic rod; 321, Light shield; 33, Detector; 40, Distribution module; 41, Third driving mechanism; 42, Distribution block; 421, First feeding channel; 422, Second feeding channel; 50, Screw. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a screw cutting mechanism with integrated length detection function. The cutting mechanism can accurately detect the length of the screw 50 and automatically process screws 50 that exceed the tolerance.

[0027] like Figures 1 to 3As shown, the screw cutting mechanism with integrated length detection function provided by this utility model includes a cutting module 10, a limiting module 20, and a detection module 30. The cutting module 10 includes a base 11 and a cutting assembly 12. A sliding cavity 13 is formed within the base 11. An inlet 111 is formed on the side wall of the sliding cavity 13, and an outlet 112 is formed on the bottom plate of the sliding cavity 13. The cutting assembly 12 is slidably disposed within the sliding cavity 13 between the inlet 111 and the outlet 112. A detection position for detecting the length of the screw 50 is formed on the sliding cavity 13. At the detection position, a limiting port 113 is formed on the top plate of the sliding cavity 13, and a detection port 114 is formed on the bottom plate of the sliding cavity 13. The positions of the limiting port 113 and the detection port 114 correspond to each other.

[0028] The limiting module 20 is disposed on the upper surface of the base 11 and its position corresponds to the limiting port 113, so as to apply downward pressure when the screw 50 is performing length detection, thereby preventing the screw 50 from moving upward.

[0029] The detection module 30 is disposed on the lower surface of the base 11, and its position corresponds to the detection port 114. The detection module 30 includes a telescopic mechanism 31, a telescopic rod 32, and a detector 33. The telescopic mechanism 31 is stationary relative to the base 11, and preferably fixed to the base 11. One end of the telescopic rod 32 is connected to the telescopic mechanism 31, and the other end of the telescopic rod 32 extends into the detection port 114. Driven by the telescopic mechanism 31, the telescopic rod 32 can move up and down relative to the telescopic mechanism 31, so that the end of the telescopic rod 32 away from the telescopic mechanism 31 abuts against the lower end face of the screw 50. The detector 33 is stationary relative to the base 11, and preferably fixed to the base 11. The detector 33 detects the extension length of the screw 50.

[0030] In this embodiment, when the screw 50 cutting mechanism is working, the screw 50 can enter the cutting module 10 through the inlet 111 on the side of the sliding cavity 13, and the cutting module 10 drives the screw 50 to the outlet 112. The screw 50 then exits from the outlet 112, completing the cutting of the screw 50. When the screw 50 is in the detection position, the limiting module 20 applies pressure to the head of the screw 50 through the limiting port 113, fixing the screw 50 in the vertical direction. The telescopic mechanism 31 drives the telescopic rod 32 to extend into the detection port 114 to abut against the lower end face of the screw shank on the screw 50. Since the length of the screw 50 (i.e., the distance between the lower surface of the flange on the screw 50 and the lower end face of the screw shank) varies, the length of the telescopic rod 32 extending into the detection port 114 will vary. By detecting the length of the telescopic rod 32 extending out by the detector 33, the length of the screw 50 can be detected.

[0031] Furthermore, such as Figure 4As shown, in this embodiment, the cutting assembly 12 includes a first driving mechanism 121, a push plate 122, a first slider 123, and a second slider 124. The first driving mechanism 121 is disposed on one end of the base 11, and the push plate 122, the first slider 123, and the second slider 124 are disposed in the sliding cavity 13. The push plate 122 is connected to the first driving mechanism 121 and moves within the sliding cavity 13 under the drive of the first driving mechanism 121. The first slider 123 is fixedly connected to the push plate 122, and the second slider 124 is connected to the push plate 122 through an elastic member 125. A blocking member 115 is also provided on the base 11, which is used to prevent the second slider 124 from continuing to move after it has slid a set distance.

[0032] A gap for storing the screw 50 is formed between the first slider 123 and the second slider 124. When the screw 50 enters the screw inlet 111, this gap corresponds to the position of the screw inlet 111, and the width of this gap is less than the width of the flange on the screw 50. When the screw 50 enters the sliding cavity 13 from the screw inlet 111, the screw 50 will enter the gap, and the flange on the screw 50 will be mounted on the first slider 123 and the second slider 124. At this time, the first drive mechanism 121 can be activated to drive the push plate 122 towards the screw outlet 112 (i.e., Figure 3 The second slider 124 moves to the left (left side). Since the movement of the second slider 124 is not restricted at this time, the push plate 122 will drive the second slider 124 to move to the left through the elastic element 125. At this time, the first slider 123 and the second slider 124 can move synchronously, and the width of the gap will not change, or at least will not increase to a distance greater than the width of the flange. The screw 50 will always be installed between the first slider 123 and the second slider 124. When the second slider 124 moves to the blocking element 115, the blocking element 115 restricts the movement of the second slider 124 to prevent the second slider 124 from continuing to move. Since the push plate 122 is still moving, the elastic element 125 will be compressed at this time to ensure that the push plate 122 can still drive the first slider 123 to move when the movement of the second slider 124 is blocked. During this movement, the width of the gap between the first slider 123 and the second slider 124 will continue to increase. When the position of this gap corresponds to the position of the nail outlet 112, the width of the gap will be greater than the width of the flange of the screw 50, and the screw 50 will come out from the nail outlet 112.

[0033] Furthermore, please continue to refer to Figure 3In this embodiment, when the gap corresponds to the position of the nail outlet 112, a limiting block 126 is also provided in the sliding cavity 13 to ensure that the flange of the screw 50 does not rest on the first slider 123. The limiting block 126 is located on the side of the gap away from the second slider 124. When the gap corresponds to the position of the nail outlet 112, the edge of the limiting block 126 facing the gap is flush with the edge of the second slider 124 facing the gap. That is, there is no space above the second slider 124, and the second slider 124 can push the screw 50 down.

[0034] Please continue to refer to Figure 3 In this embodiment, a limiting groove 116 can be formed on the side of the sliding cavity 13, and a blocking member 115 is formed on the side wall at the end of the limiting groove 116. A limiting bolt 1241 can be provided on the second slider 124, and the end of the limiting bolt 1241 can correspond to the blocking member 115. When the limiting bolt 1241 abuts against the blocking member 115, the blocking member 115 prevents the second slider 124 from continuing to move.

[0035] Please continue to refer to Figure 1 , Figure 3 and Figure 7 The limiting module 20 includes a second drive mechanism 21, a limiting pressure head 22, and a position sensor 23. The second drive mechanism 21 is stationary relative to the base 11, preferably disposed on the upper surface of the base 11. The limiting pressure head 22 is connected to the second drive mechanism 21 and moves up and down under the drive of the second drive mechanism 21, so that when moving downward, the limiting pressure head 22 extends into the limiting port 113 and presses against the upper end face of the screw head in the screw 50. The position sensor 23 is disposed on the base 11 and detects whether the screw 50 is in the detection position.

[0036] When the screw 50 length is detected, the in-position sensor 23 detects that the screw 50 has entered the detection position, and the second drive mechanism 21 will drive the limiting pressure head 22 to move downward to press on the upper end surface of the screw head.

[0037] More specifically, in this embodiment, a through hole 221 is provided on the limiting pressure head 22, and the position of the through hole 221 corresponds to the position of the limiting port 113 in the vertical direction. The in-position sensor 23 passes through the through hole 221 to detect the screw 50 in the limiting port 113.

[0038] To save production time, in this embodiment, the detection position is located at the screw inlet 111, that is, the center line of the limiting port 113, the detection port 114, and the screw inlet 111 is located on the same vertical plane. When the screw 50 enters the screw inlet 111, the length of the screw 50 can be detected.

[0039] To ensure the accuracy of the test, the axis of the telescopic rod 32, the axis of the screw 50, and the limiting pressure head 22 are located on the same straight line.

[0040] Please continue to refer to Figure 1 and Figure 3 In this embodiment, the detector 33 can be a light flux detector, that is, it is equipped with a light emitter and a light receiver. A light shield 321 is provided on the telescopic rod 32, and the light shield 321 is disposed between the light flux detectors 33. When the telescopic rod 32 extends or retracts, it drives the light shield 321 to move, thereby changing the depth of the light shield 321 into the light flux detector 33, and thus changing the light flux within the light flux detector 33.

[0041] Please continue to refer to Figure 1 , Figure 5 and Figure 6 The screw cutting mechanism integrating length and shortness detection also includes a distribution module 40. The distribution module 40 includes a third drive mechanism 41 and a distribution block 42. The third drive mechanism 41 is stationary relative to the base 11; preferably, the third drive mechanism 41 is fixedly mounted on the base 11. A first feeding channel 421 and a second feeding channel 422 are provided within the distribution block 42. The distribution block 42 is connected to the third drive mechanism 41, and the third drive mechanism 41 drives the distribution block 42 to move, selectively connecting either the first feeding channel 421 or the second feeding channel 422 to the screw outlet 112.

[0042] In this embodiment, after detecting the length of the screw 50, the length of the screw 50 can be analyzed. If the length of the screw 50 meets the set length, the third drive mechanism 41 can drive the distribution block 42 to move so that the first feeding channel 421 is connected to the nail outlet 112. After the screw 50 comes out of the nail outlet 112, it can reach the next station through the first feeding channel 421. If the length of the screw 50 does not meet the set length, the third drive mechanism 41 can drive the distribution block 42 to move so that the second feeding channel 422 is connected to the nail outlet 112. After the screw 50 comes out of the nail outlet 112, it can connect to the waste hopper (not shown) through the second feeding channel 422.

[0043] Understandably, a flexible conduit can also be connected to the second discharge channel 422 to guide the screw 50 into the waste hopper.

[0044] In this embodiment, compared to the first drive mechanism 121, the nail outlet 112 is located on the side of the nail inlet 111 that is away from the first drive mechanism 121. This facilitates the movement of the cutting module 10 and also provides sufficient space for the arrangement of the distribution module 40.

[0045] In summary, in this invention, the limiting module 20 and the detection module 30 enable the telescopic rod 32 of the detection module 30 to abut against the end face of the screw 50, and the detector 33 detects the extension of the telescopic rod 32 to determine the length of the screw. Furthermore, by setting the detector 33 as a light flux detector, the extension length of the telescopic rod 32 can be reflected by changes in light flux, making the detection results more accurate. Furthermore, the distribution module 40 automatically removes defective screws 50, saving production time. Furthermore, the first slider 123, the second slider 124, and related components automatically change the width of the gap accommodating the screws 50 and prevent the screws 50 from getting caught on the first slider 123 or the second slider 124.

[0046] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A screw cutting mechanism integrating length detection function, characterized in that: The device includes a cutting module, a limiting module, and a detection module. The cutting module includes a base with a detection position formed on the base for detecting the length of a screw. A limiting opening is formed at the top of the base, and a detection opening is formed at the bottom of the base. The limiting opening and the detection opening are positioned opposite each other. The limiting module is disposed on the base and its position corresponds to the position of the detection opening to apply downward pressure during screw length detection, preventing the screw from moving upward. The detection module is disposed on the base and its position corresponds to the detection opening. The detection module includes a telescopic mechanism, a telescopic rod, and a detector. The telescopic mechanism is stationary relative to the base. One end of the telescopic rod is connected to the telescopic mechanism, and the other end extends into the detection opening. Driven by the telescopic mechanism, the telescopic rod selectively abuts against the lower end face of the screw. The detector detects the extension length of the screw.

2. The screw cutting mechanism with integrated length and shortness detection function according to claim 1, characterized in that: A sliding cavity is formed inside the base, an inlet is formed on the side wall of the sliding cavity, an outlet is formed on the bottom plate of the sliding cavity, a limiting port is formed on the top plate of the sliding cavity, and a detection port is formed on the bottom plate of the sliding cavity.

3. The screw cutting mechanism with integrated length and shortness detection function according to claim 2, characterized in that: The cutting module further includes a cutting assembly, which includes a first driving mechanism, a push plate, a first slider, a second slider, and an elastic element. The first driving mechanism is disposed on the base, and the push plate, the first slider, and the second slider are disposed in the sliding cavity. The push plate is connected to the first driving mechanism and moves in the sliding cavity under the drive of the first driving mechanism. The first slider is fixedly connected to the push plate, and the second slider is connected to the push plate through the elastic element. A blocking element is also disposed on the base, which is used to prevent the second slider from continuing to move after sliding a set distance.

4. The screw cutting mechanism with integrated length and shortness detection function according to claim 3, characterized in that: A gap for storing screws is formed between the first slider and the second slider. When the screw enters the screw inlet, the gap corresponds to the position of the screw inlet, and the width of the gap is less than the width of the upper flange of the screw. When the gap moves to the screw outlet, the width of the gap is greater than the width of the upper flange of the screw.

5. The screw cutting mechanism with integrated length and shortness detection function according to claim 4, characterized in that: A limiting block is also provided in the sliding cavity. The limiting block is located on the side of the gap away from the second slider. When the position of the gap corresponds to the position of the nail outlet, the edge of the limiting block facing the gap is flush with the edge of the second slider facing the gap.

6. The screw cutting mechanism with integrated length and shortness detection function according to claim 2, characterized in that: The limiting module includes a second driving mechanism, a limiting pressure head, and an in-position sensor. The second driving mechanism is stationary relative to the base. The limiting pressure head is connected to the second driving mechanism and moves up and down under the drive of the second driving mechanism. When moving downward, the limiting pressure head extends into the limiting port and presses against the upper end face of the screw head. The in-position sensor is disposed on the base and detects whether the screw is located at the detection position.

7. The screw cutting mechanism with integrated length and shortness detection function according to claim 6, characterized in that: A through hole is provided on the limiting pressure head. In the vertical direction, the position of the through hole corresponds to the position of the limiting port. The in-situ sensor passes through the through hole to detect the screw in the limiting port.

8. The screw cutting mechanism with integrated length and shortness detection function according to claim 2, characterized in that: The detector is a light flux detector, which contains a light emitter and a light receiver. A light shield is installed on the telescopic rod and is positioned between the light flux detectors. When the telescopic rod extends or retracts, it moves the light shield, thereby changing the light flux in the light flux detector.

9. The screw cutting mechanism with integrated length and shortness detection function according to claim 2, characterized in that: The screw cutting mechanism with integrated length and shortness detection function also includes a distribution module. The distribution module includes a third drive mechanism and a distribution block. The third drive mechanism is stationary relative to the base. The distribution block is provided with a first feeding channel and a second feeding channel. The distribution block is connected to the third drive mechanism. The third drive mechanism drives the distribution block to move so that the first feeding channel or the second feeding channel can be connected to the screw outlet.

10. The screw cutting mechanism with integrated length and shortness detection function according to claim 2, characterized in that: The centerlines of the limiting port, the detection port, and the nail inlet are located on the same vertical plane.

Images