Bolt thread detection device

Abstract

The invention, which relates to the technical field of the sorting device, discloses a bolt thread detection device comprising a first detection assembly and a second detection assembly. The first detection assembly is provided with arc-shaped detection pieces driven by a gear, and when a bolt enters an opening clamping space of the first detection assembly, if a thread is too large, the inner concave surfaces of the two arc-shaped detection pieces cannot be flush, and the gear cannot rotate; the second detection assembly comprises two symmetrical semi-cylindrical surface detection clamping pieces, and a water bag is fixed on the inner side of the second detection assembly; after passing through the first detection assembly, the bolt enters the clamping space of the second detection assembly, the water bag is squeezed to drain water, and if the displacement is lower than a preset value, the size of the bolt is too small.

Description

Technical Field

[0001] The present invention relates to the technical field of sorting devices, and in particular to a bolt thread detection device. Background Art

[0002] Bolt thread is the core component of mechanical connection, and its quality directly affects the safety and reliability of the equipment. Traditional manual inspection relies on visual inspection, calipers, thread gauges and other tools to judge the compliance by comparing each piece with a standard sample or measuring key parameters.

[0003] Publication No. CN109029187B discloses a bolt thread inspection device, including a left half thread gauge, a right half thread gauge, a left gear, a right gear, a support member, and a base. The left half thread gauge is installed on the left gear, which is installed on the base through the support member, and the right half thread gauge is installed on the right gear, which is installed on the base through the support member. The left gear and the right gear are meshed with each other, and the line connecting the center point of the left gear and the center point of the right gear is the middle line. In the process of meshing and rotating the left gear and the right gear, the left half thread gauge and the right half thread gauge reach the middle line at the same time, and the left half thread gauge and the right half thread gauge form a circular ring gauge at the middle line position. The inspection device is suitable for rapid inspection of bolt threads.

[0004] During actual use of the above-mentioned bolt thread inspection device, when the entire bolt is smaller than the package of the thread gauge, it will pass the inspection, but it is not a qualified part, resulting in a technical problem of low inspection accuracy. Summary of the invention

[0005] The present application provides a bolt thread detection device, which solves the technical problem in the prior art that when the bolt as a whole is smaller than the thread gauge, it will pass the detection but it is not a qualified part, resulting in low detection accuracy. The bolt thread is detected by an arc-shaped detection part, and after passing normally, it enters the detection of the second detection component. The bolt squeezes the water bag, the water bag is squeezed, and the liquid level of the detection column rises, so that bolts smaller than qualified parts can be detected, thereby improving the technical effect of detecting accuracy.

[0006] The present application provides a bolt thread detection device, a bolt thread detection device, comprising a first detection component; the first detection component comprises an arc-shaped detection part, when driven to rotate by a gear, the inner concave surfaces of the two arc-shaped detection parts can be relatively flush, and the bolt enters the opening clamping space of the arc-shaped detection part. When the thread is too large, the two inner concave surfaces cannot be flush, so that the gear driving the arc-shaped detection part cannot rotate. It also includes a second detection component, which includes two symmetrical semi-cylindrical detection card components, and a water bag is fixed on the inner side of the detection card component. When the bolt passes through the first detection component, it falls into the clamping space of the second detection component, and the water bag is squeezed to drain water. When the water discharge is lower than the preset value, it is determined that the bolt size is too small.

[0007] It also includes a base and a transport device arranged on the base, the first detection assembly and the second detection assembly are arranged at the lower end of the transport device, and a manipulator is arranged at the upper end of the transport device; the gear is installed on the top of the base and located at the lower end of the transport device; the arc-shaped detection member is circumferentially fixed on the gear; the inner section of the arc-shaped detection member is provided with a thread that cooperates with the bolt; the sandwich space surrounded by the arc-shaped detection members on the upper top surface of the meshing position of the two gears is used to detect the thread of the bolt; The second detection assembly also includes a half gear, an electric telescopic rod and a double-sided rack; the lower part of the inner section of the detection card is symmetrically fixed with a half gear; the detection card is rotatably connected to the top of the base through the half gear; The electric telescopic rod is fixed on the base and is close to the detection card; the double-sided rack is fixed on the output end of the electric telescopic rod; the double-sided rack is meshed with two half gears; The water bag is fixed on the upper part of the inner cross section of the detection card; the detection column is fixed on the top of the detection card; the interior of the detection column is a hollow transparent structure with an opening at the bottom.

[0008] Preferably, a membrane body is fixed on the inner cross-section of the water bag, and the membrane body is made of thermoplastic elastomer TPE; the membrane body can be softened by heat and can be attached to the pitch gap of the bolt; a first cavity is opened in the membrane body, and a connecting pipe is connected to the top of the first cavity; the end of the connecting pipe is connected to a micro water pump, and water at 60℃-70℃ is filled into the first cavity through the micro water pump; an electromagnetic valve is installed at the connection between the connecting pipe and the first cavity.

[0009] Preferably, the membrane body is provided with strip electromagnets and iron powder, and the number and position of the strip electromagnets and the iron powder correspond one to one. The strip electromagnets absorb the iron powder so that the membrane body wraps the bolt thread while leaving a gap at the position of the bolt thread top; the membrane body is also provided with a plurality of strip grooves, the strip grooves are filled with iron powder and are close to the water bag; the water bag is fixedly connected with a plurality of strip electromagnets, the strip electromagnets are close to the iron powder.

[0010] Preferably, a second cavity and a third cavity are opened in the membrane body; the second cavity is close to the first cavity, and the third cavity is far away from the first cavity; the second cavity is filled with melted paraffin at 40°C, and the third cavity is filled with softened paraffin at 80°C, and a shooting device is symmetrically fixed on the top of the base; the shooting device is close to the second detection component.

[0011] One or more technical solutions provided in this application have at least the following technical effects or advantages: The thread of the bolt is inspected by an arc-shaped detection part. After passing normally, it enters the inspection of the second detection component. The bolt squeezes the water bag, and the water bag is squeezed, and the liquid level of the detection column rises. Bolts that are smaller than qualified parts can be detected, thereby improving the technical effect of detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural stereoscopic schematic diagram of a bolt thread detection device of the present invention; Figure 2 It is a partial cross-sectional structural diagram of a detection fixture of a bolt thread detection device of the present invention; Figure 3 It is a schematic diagram of the top view of a bolt thread detection device of the present invention; Figure 4 This is a partial cross-sectional structural diagram of a membrane body of a second embodiment of a bolt thread detection device of the present invention; Figure 5 This is a schematic diagram of the position of a bar-shaped electromagnet in Embodiment 3 of a bolt thread detection device of the present invention; Figure 6 This is a schematic diagram of the position of the second cavity of a fourth embodiment of a bolt thread detection device of the present invention; Figure 7 It is an enlarged view of Embodiment 4A of a bolt thread detection device of the present invention; Figure 8 This is a schematic diagram of the position of a photographing device in Embodiment 4 of a bolt thread detection device of the present invention.

[0013] In the figure: 100. Base; 110. Transport device; 120. Bolt; 130. Manipulator; 140. First detection component; 141. Gear; 142. Arc detection member; 200. Second detection component; 210. Detection card; 211. Half gear; 220. Electric telescopic rod; 221. Double-sided rack; 230. Water bag; 231. Detection column; 232. Bar electromagnet; 240. Membrane; 241. First cavity; 242. Connecting pipe; 2421. Solenoid valve; 243. Iron powder; 244. Second cavity; 245. Third cavity; 250. Photographing device. DETAILED DESCRIPTION

[0014] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0015] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] Embodiment 1: Figures 1 to 3 As shown, the present application provides a bolt thread detection device, including a first detection component 140; the first detection component 140 includes an arc-shaped detection member 142. When driven to rotate by a gear 141, the inner concave surfaces of the two arc-shaped detection members 142 can be relatively flush, and the bolt 120 enters the opening clamping space of the arc-shaped detection member 142. When the thread is too large, the two inner concave surfaces cannot be flush, so that the gear 141 driving the arc-shaped detection member 142 cannot rotate. It also includes a second detection component 200, which includes two symmetrical semi-cylindrical detection cards 210. A water bag 230 is fixed on the inner side of the detection card 210. When the bolt 120 passes through the first detection component 140, it falls into the clamping space of the second detection component 200, and the water bag 230 is squeezed to drain water. When the water discharge is lower than a preset value, it is determined that the bolt 120 is too small.

[0018] It also includes a base 100 and a transport device 110 arranged on the base 100, the first detection component 140 and the second detection component 200 are arranged at the lower end of the transport device, and the upper end of the transport device 110 is provided with a manipulator 130, which is used to clamp unqualified bolts 120; the gear 141 is installed on the top of the base 100 and is located at the lower end of the transport device 110; the arc-shaped detection member 142 is circumferentially fixed on the gear 141; the inner section of the arc-shaped detection member 142 is provided with a thread that cooperates with the bolt 120; the clamping space surrounded by the arc-shaped detection member 142 on the upper top surface of the meshing place of the two gears 141 is used to detect the thread of the bolt 120; The second detection assembly 200 further includes a half gear 211, an electric telescopic rod 220 and a double-sided rack 221; the lower part of the inner cross section of the detection card 210 is symmetrically fixed with a half gear 211; the detection card 210 is rotatably connected to the top of the base 100 through the half gear 211; The electric telescopic rod 220 is fixed on the base 100 and is close to the detection card 210; the double-sided rack 221 is fixed to the output end of the electric telescopic rod 220; the double-sided rack 221 is meshed with the two half gears 211; The water bag 230 is fixed to the upper part of the inner cross section of the detection card 210 ; the detection column 231 is fixed to the top of the detection card 210 ; the interior of the detection column 231 is a hollow transparent structure with an opening at the bottom.

[0019] Specific implementation: When the transport device 110 transports the bolt 120 close to the gear 141, the arc-shaped detection member 142 on the gear 141 wraps the threaded part of the bolt 120 for detection; when the bolt 120 is too large, it is stuck in the arc-shaped detection member 142, which is unqualified, and the unqualified bolt 120 is grabbed by the manipulator 130; when the bolt 120 passes the inspection of the first detection component 140 normally (normal passing is not necessarily a qualified part, and the bolt 120 smaller than the qualified part can also pass), it enters the inspection of the second detection component 200. Testing stage: the electric telescopic rod 220 is extended to drive the double-sided rack 221 to move, the double-sided rack 221 drives the half gear 211 to rotate, and the half gear 211 drives the detection card 210 to rotate. As the bolt 120 moves, the water bag 230 on the detection card 210 wraps the bolt 120, and the bolt 120 squeezes the water bag 230, so that the water in the water bag 230 is squeezed into the detection column 231. When the water level meets the preset height value of the detection column 231, it is qualified, otherwise it is unqualified, and it is grabbed by the manipulator 130.

[0020] Beneficial effect: The thread of the bolt 120 is inspected by the arc-shaped detection member 142. After passing normally, it enters the inspection of the second detection component 200. The bolt 120 squeezes the water bag 230. When the water bag 230 is squeezed, the liquid level of the detection column 231 rises, and the bolt 120 that is smaller than the qualified part can be detected, thereby improving the detection accuracy.

[0021] Embodiment 2: When the water bag 230 wraps the threaded portion of the bolt 120, the water bag 230 may not wrap the pitch gap of the bolt 120, resulting in the pitch gap of the bolt 120 being too large, making the detection inaccurate; This application proposes the following technical solutions to the above technical problems, specifically: like Figure 4As shown, a membrane body 240 is fixed on the inner cross-section of the water bag 230, and the membrane body 240 is made of thermoplastic elastomer TPE; the membrane body 240 can be softened by heat and can be attached to the pitch gap of the bolt 120; a first cavity 241 is opened in the membrane body 240, and a connecting pipe 242 is connected to the top of the first cavity 241; the end of the connecting pipe 242 is connected to a micro water pump, and water at 60℃-70℃ is filled into the first cavity 241 through the micro water pump; an electromagnetic valve 2421 is installed at the connection between the connecting pipe 242 and the first cavity 241.

[0022] Specific implementation: open the solenoid valve 2421, fill the first cavity 241 in the membrane body 240 with water at 60℃-70℃, and then close the solenoid valve 2421. At this time, the pressure in the first cavity 241 increases and softens the membrane body 240; when the bolt 120 enters the detection stage of the second detection component 200, the softened membrane body 240 on the water bag 230 can wrap the pitch gap of the bolt 120, thereby improving the accuracy of detection.

[0023] One or more technical solutions provided in this application have at least the following technical effects or advantages: The softened membrane 240 on the water bag 230 can wrap the thread pitch gap of the bolt 120, thereby improving the accuracy of detection.

[0024] Embodiment 3: In order to prevent the film body 240 from wrapping the thread crest of the bolt 120 too tightly, which may cause the thread on the bolt 120 to scratch the film body 240 for a long time; the present application proposes the following technical solutions to the above technical problems, specifically: like Figure 5 As shown, the membrane body 240 is provided with a strip electromagnet 232 and iron powder 243, and the number and position of the strip electromagnet 232 and the iron powder 243 correspond one to one. The strip electromagnet 232 absorbs the iron powder 243, so that the membrane body 240 wraps the thread of the bolt 120 while leaving a gap at the position of the thread top of the bolt 120; the membrane body 240 is also provided with a plurality of strip grooves, the strip grooves are filled with iron powder 243 and are close to the water bag 230; the water bag 230 is fixedly connected with a plurality of strip electromagnets 232, and the strip electromagnets 232 are close to the iron powder 243.

[0025] Specific implementation: open the solenoid valve 2421, fill the first cavity 241 in the membrane body 240 with water at 60℃-70℃, and then close the solenoid valve 2421. At this time, the pressure in the first cavity 241 increases and softens the membrane body 240; when the bolt 120 enters the detection stage of the second detection component 200, start the bar electromagnet 232, and the bar electromagnet 232 magnetically attracts the iron powder 243, and the surface of the membrane body 240 in contact with the thread of the bolt 120 is concave into a thread shape, so that the membrane body 240 wraps the thread of the bolt 120 while leaving a gap at the position of the thread top of the bolt 120.

[0026] One or more technical solutions provided in this application have at least the following technical effects or advantages: While the film body 240 wraps around the thread of the bolt 120 , a gap is left at the position of the thread crest of the bolt 120 to prevent the film body 240 from being scratched by the thread crest of the bolt 120 due to over-tightening.

[0027] Embodiment 4: When the thread width and pitch of the bolt 120 are increased, it may be misjudged as a qualified part in the detection of the second detection component 200; the present application proposes the following technical solutions to the above technical problems, specifically: like Figures 6 to 8 As shown, the membrane body 240 is further provided with a second cavity 244 and a third cavity 245; the second cavity 244 is close to the first cavity 241, and the third cavity 245 is far away from the first cavity 241; the second cavity 244 is filled with melted paraffin at 40°C, and the third cavity 245 is filled with softened paraffin at 80°C, and a shooting device 250 is symmetrically fixed to the top of the base 100; the shooting device 250 is close to the second detection component 200.

[0028] Specific implementation: S1: open the solenoid valve 2421, fill the first cavity 241 in the membrane body 240 with water at 60℃-70℃, and then close the solenoid valve 2421; the membrane body 240 softens, the pressure in the first cavity 241 increases, and the paraffin in the second cavity 244 melts and the paraffin in the third cavity 245 softens.

[0029] S2: After the bolt 120 passes through the first detection component 140 and enters the detection stage of the second detection component 200, the bar electromagnet 232 is started, and the bar electromagnet 232 magnetically attracts the iron powder 243; the surface of the film body 240 in contact with the thread of the bolt 120 is concave into a thread shape, and the film body 240 wraps the thread of the bolt 120.

[0030] S3: When the bolt 120 is separated from the film body 240, the surface where the film body 240 contacts the thread of the bolt 120 will form a thread shape. Then, the film body 240 thread shape is photographed and calculated using the camera 250 to calculate whether the thread pitch and the size of the thread are accurate.

[0031] One or more technical solutions provided in this application have at least the following technical effects or advantages: By utilizing the melting of paraffin in the second cavity 244 and the softening of paraffin in the third cavity 245, the surface where the film body 240 contacts the thread of the bolt 120 can be shaped, but the paraffin in the third cavity 245 will not flow after softening, and the shape of the thread contact surface between the film body 240 and the bolt 120 is photographed and calculated by the photographing device 250. Through the photographing and detection of the photographing device 250, it is possible to detect whether the width and pitch of the threads are accurate, thereby further ensuring the accuracy of the detection of the thread of the bolt 120.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bolt thread detection device, comprising a first detection component (140); the first detection component (140) comprises an arc-shaped detection member (142), and when the first detection component (140) is driven to rotate by a gear (141), the inner concave surfaces of the two arc-shaped detection members (142) can be relatively flush, and the bolt (120) enters the opening clamping space of the arc-shaped detection member (142). When the thread is too large, the two inner concave surfaces cannot be flush, so that the gear (141) driving the arc-shaped detection member (142) cannot rotate, and the characteristics are as follows: It also includes a second detection component (200), which includes two symmetrical semi-cylindrical detection cards (210), wherein a water bag (230) is fixed inside the detection card (210); when the bolt (120) passes through the first detection component (140) and falls into the clamping space of the second detection component (200), the water bag (230) is squeezed to drain water; when the amount of water drained is lower than a preset value, it is determined that the bolt (120) is too small.

2. A bolt thread detection device as claimed in claim 1, characterized in that: The invention also comprises a base (100) and a transport device (110) arranged on the base (100); the first detection component and the second detection component (200) are arranged at the lower end of the transport device (110); and a manipulator (130) is arranged at the upper end of the transport device (110); the gear (141) is mounted on the top of the base (100) and is located at the lower end of the transport device (110); the arc-shaped detection member (142) is circumferentially fixed on the gear (141); the inner cross section of the arc-shaped detection member (142) is provided with a thread that cooperates with the bolt (120); and the sandwich space enclosed by the arc-shaped detection member (142) on the upper top surface of the meshing position of the two gears (141) is used to detect the thread of the bolt (120).

3. A bolt thread detection device as claimed in claim 1, characterized in that: The second detection assembly (200) further comprises a half gear (211), an electric telescopic rod (220), a detection column (231) and a double-sided rack (221); the half gear (211) is symmetrically fixed to the lower part of the inner cross section of the detection card (210); and the detection card (210) is rotatably connected to the top of the base (100) via the half gear (211).

4. A bolt thread detection device as claimed in claim 3, characterized in that: The electric telescopic rod (220) is fixed on the base (100) and is close to the detection card (210); the double-sided rack (221) is fixed to the output end of the electric telescopic rod (220); and the double-sided rack (221) is meshed with two half gears (211).

5. A bolt thread detection device as claimed in claim 3, characterized in that: The water bag (230) is fixed to the upper part of the inner cross section of the detection card (210); the detection column (231) is fixed to the top of the detection card (210); the interior of the detection column (231) is a hollow transparent structure with an opening at the bottom.

6. A bolt thread detection device as claimed in claim 1, characterized in that: A membrane body (240) is fixed on the inner cross section of the water bag (230), and the membrane body (240) is made of a thermoplastic elastomer (TPE) material; the membrane body (240) can be softened by heat and can be attached to the pitch gap of the bolt (120).

7. A bolt thread detection device as claimed in claim 6, characterized in that: A first cavity (241) is formed in the membrane body (240), and a connecting pipe (242) is connected to the top of the first cavity (241); the end of the connecting pipe (242) is connected to a micro water pump, and water at 60°C-70°C is filled into the first cavity (241) through the micro water pump; and a solenoid valve (2421) is installed at the connection point between the connecting pipe (242) and the first cavity (241).

8. A bolt thread detection device as claimed in claim 6, characterized in that: The film body (240) is provided with a bar-shaped electromagnet (232) and iron powder (243), and the number and position of the bar-shaped electromagnet (232) and the iron powder (243) correspond one to one. The bar-shaped electromagnet (232) absorbs the iron powder (243), so that the film body (240) wraps around the thread of the bolt (120) while leaving a gap at the position of the thread crest of the bolt (120).

9. A bolt thread detection device as claimed in claim 7, characterized in that: The membrane body (240) is further provided with a plurality of strip-shaped grooves, wherein iron powder (243) is contained in the strip-shaped grooves and is close to the water bag (230); a plurality of strip-shaped electromagnets (232) are fixedly connected in the water bag (230), and the strip-shaped electromagnets (232) are close to the iron powder (243).

10. A bolt thread detection device as claimed in claim 9, characterized in that: The membrane body (240) is further provided with a second cavity (244) and a third cavity (245); the second cavity (244) is close to the first cavity (241), and the third cavity (245) is far from the first cavity (241); the second cavity (244) is filled with melted paraffin at 40°C, and the third cavity (245) is filled with softened paraffin at 80°C; a shooting device (250) is symmetrically fixed to the top of the base (100); the shooting device (250) is close to the second detection component (200).

Images