A bolt thread inspection device

Abstract

The application discloses a bolt thread detection device, and relates to the technical field of sorting devices, which comprises a first detection assembly and a second detection assembly. The first detection assembly is provided with arc-shaped detection pieces driven by a gear. When a bolt enters the opening clamping space of the first detection assembly, if the thread is too large, the inner concave surfaces of the two arc-shaped detection pieces cannot be flush, so that the gear cannot rotate. The second detection assembly comprises two symmetrical semicylindrical surface detection clamping pieces, and water bags are fixed on the inner sides. After the bolt passes through the first detection assembly, the bolt enters the clamping space of the second detection assembly. The water bags are extruded to drain water. If the amount of drained water is lower than a preset value, it is determined that the size of the bolt is too small.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sorting devices, in particular to a bolt thread detection device. BACKGROUND

[0002] The quality of bolt threads directly affects the safety and reliability of equipment as core components of mechanical connection; traditional manual inspection relies on visual inspection, calipers or thread gauges and the like to judge the eligibility by comparing with standard samples or measuring key parameters.

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

[0004] The bolt thread inspection device has the technical problem of low detection accuracy because when the whole bolt is smaller than the wrapping of the thread gauge, it will also pass the detection, but it is not a qualified piece. SUMMARY

[0005] The bolt thread detection device provided by the application solves the technical problem of low detection accuracy in the prior art because when the whole bolt is smaller than the wrapping of the thread gauge, it will also pass the detection, but it is not a qualified piece. The threads of the bolt are detected by the arc-shaped detection piece, and after normal passing, the bolt is detected by the second detection assembly. The water bag is squeezed, the liquid level of the detection column rises, the bolt smaller than the qualified piece can be detected, and the technical effect of improving the detection accuracy is achieved.

[0006] The application provides a bolt thread detection device, which comprises a first detection assembly; the first detection assembly comprises arc-shaped detection pieces, and when the arc-shaped detection pieces are rotated by a gear, the inner concave surfaces of the two arc-shaped detection pieces can be relatively flat. The bolt enters the opening clamping space of the arc-shaped detection piece. When the thread is too large, the two inner concave surfaces cannot be flat, so that the gear driving the arc-shaped detection piece cannot rotate. The second detection assembly comprises two symmetrical semicylindrical detection clamps, and a water bag is fixed inside the detection clamp. After the bolt passes the first detection assembly, the water bag is squeezed and drained when the bolt falls into the clamping space of the second detection assembly. When the drainage amount is lower than a preset value, it is determined that the size of the bolt is too small.

[0007] The base and the transport device arranged on the base are further included, the first detection assembly and the second detection assembly are arranged at the lower end of the transport device, the upper end of the transport device is provided with a mechanical hand; the gear is mounted on the top of the base and located at the lower end of the transport device; the arc-shaped detection piece is fixed circumferentially on the gear; the inner cross section of the arc-shaped detection piece is provided with threads matched with the bolt; the clamping space surrounded by the arc-shaped detection pieces on the upper top surface of the meshing position of the two gears is used for detecting the threads of the bolt;

[0008] The second detection assembly further includes a half gear, an electric telescopic rod and a double-sided rack; the lower part of the inner cross section of the detection card piece is symmetrically fixed with a half gear; the detection card piece is rotationally connected to the top of the base through the half gear;

[0009] The electric telescopic rod is fixed on the base and close to the detection card piece; the output end of the electric telescopic rod is fixed with the double-sided rack; the double-sided rack is meshed with the two half gears;

[0010] The water bag is fixed on the upper part of the inner cross section of the detection card piece; the detection column is fixed on the top of the detection card piece; the inside of the detection column is a hollow transparent structure with a lower opening.

[0011] Preferably, a film body is fixed on the inner cross section of the water bag, the film body is made of thermoplastic elastomer TPE material; the film body can soften and adhere to the pitch gap of the bolt under heat; a first cavity is opened in the film body, a connecting pipe is connected to the top of the first cavity; the end of the connecting pipe is communicated with a micro water pump, 60-70℃ water is filled into the first cavity through the micro water pump; an electromagnetic valve is installed at the communication position of the connecting pipe and the first cavity.

[0012] Preferably, a strip-shaped electromagnet and iron powder are arranged in the film body, and the number and position of the strip-shaped electromagnet and the iron powder are one-to-one corresponding, the strip-shaped electromagnet adsorbs the iron powder, so that the film body leaves a gap at the position of the thread top of the bolt while wrapping the threads of the bolt; a plurality of strip-shaped grooves are opened in the film body, the strip-shaped grooves are filled with iron powder and close to the water bag; a plurality of strip-shaped electromagnets are fixedly connected in the water bag, and the strip-shaped electromagnets are close to the iron powder.

[0013] Preferably, a second cavity and a third cavity are further opened in the film body; the second cavity is close to the first cavity, and the third cavity is away from the first cavity; 40℃ melting paraffin is filled in the second cavity, and 80℃ softening paraffin is filled in the third cavity; a shooting device is symmetrically fixed on the top of the base; the shooting device is close to the second detection assembly.

[0014] One or more technical solutions provided in the application have at least the following technical effects or advantages:

[0015] Through the arc detection piece detects the thread of the bolt, normally passes through and enters the detection of the second detection assembly, the bolt extrudes the water bag, the water bag is extruded, the liquid level of the detection column rises, bolts smaller than qualified parts can be detected, and the technical effect of improving the detection accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure perspective view of the bolt thread detection device of the application;

[0017] Figure 2 It is a detection clamping piece partial structure view of the bolt thread detection device of the application;

[0018] Figure 3 It is a top view structure schematic view of the bolt thread detection device of the application;

[0019] Figure 4 It is a membrane body partial structure view of the second embodiment of the bolt thread detection device of the application;

[0020] Figure 5 It is a bar-shaped electromagnet position schematic view of the third embodiment of the bolt thread detection device of the application;

[0021] Figure 6 It is a second cavity position schematic view of the fourth embodiment of the bolt thread detection device of the application;

[0022] Figure 7 It is an enlarged view of the fourth embodiment A of the bolt thread detection device of the application;

[0023] Figure 8 It is a shooting device position schematic view of the fourth embodiment of the bolt thread detection device of the application.

[0024] In the figure:

[0025] 100, base, 110, conveying device, 120, bolt, 130, mechanical hand, 140, first detection assembly, 141, gear, 142, arc detection piece, 200, second detection assembly, 210, detection clamping piece, 211, half gear, 220, electric telescopic rod, 221, double-sided rack, 230, water bag, 231, detection column, 232, bar-shaped electromagnet, 240, membrane body, 241, first cavity, 242, connecting pipe, 2421, electromagnetic valve, 243, iron powder, 244, second cavity, 245, third cavity, 250, shooting device. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0027] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Example 1: As Figures 1 to 3 As shown, this application discloses a bolt thread detection device, including a first detection component 140. The first detection component 140 includes arc-shaped detection elements 142. When rotated by a gear 141, the concave surfaces of the two arc-shaped detection elements 142 can be relatively flush. The bolt 120 enters the opening clamping space of the arc-shaped detection elements 142. When the thread is too large, the two concave surfaces cannot be flush, making it impossible for the gear 141 driving the arc-shaped detection elements 142 to rotate. The device also includes a second detection component 200, which includes two symmetrical semi-cylindrical detection clips 210. A water bladder 230 is fixed inside the detection clips 210. When the bolt 120 passes through the first detection component 140, it falls into the clamping space of the second detection component 200. The water bladder 230 is squeezed to drain water. When the drainage volume is lower than a preset value, it is determined that the bolt 120 is too small.

[0030] It also includes a base 100 and a transport device 110 disposed on the base 100. The first detection component 140 and the second detection component 200 are disposed at the lower end of the transport device. A robot arm 130 is disposed at the upper end of the transport device 110, which is used to clamp unqualified bolts 120. The gear 141 is mounted on the top of the base 100 and located at the lower end of the transport device 110. The arc-shaped detection element 142 is circumferentially fixed on the gear 141. The inner cross section of the arc-shaped detection element 142 is provided with threads that cooperate with the bolt 120. The clamping space formed by the arc-shaped detection element 142 on the upper surface of the meshing point of the two gears 141 is used to detect the threads of the bolt 120.

[0031] The second detection assembly 200 further comprises half gears 211, an electric telescopic rod 220 and a double-sided rack 221; the lower part of the inner section of the detection clamping piece 210 is fixedly provided with the half gears 211; the detection clamping piece 210 is rotationally connected to the top of the base 100 through the half gears 211;

[0032] The electric telescopic rod 220 is fixed on the base 100 and close to the detection clamping piece 210; the output end of the electric telescopic rod 220 is fixed with the double-sided rack 221; the double-sided rack 221 is engaged with the two half gears 211;

[0033] The water bag 230 is fixed on the upper part of the inner section of the detection clamping piece 210; the detection column 231 is fixed on the top of the detection clamping piece 210; the inside of the detection column 231 is a hollow transparent structure with a lower opening.

[0034] Specific implementation: when the transportation device 110 transports the bolt 120 close to the gear 141, the arc-shaped detection piece 142 on the gear 141 wraps the threaded part of the bolt 120 for detection; when the bolt 120 is too large to be clamped in the arc-shaped detection piece 142, it is unqualified, and the mechanical hand 130 is used to grab the unqualified bolt 120; after the bolt 120 normally passes through the detection of the first detection assembly 140 (normal passing does not necessarily mean qualified, and the bolt 120 smaller than the qualified one can also pass through), it enters the detection stage of the second detection assembly 200; the double-sided rack 221 is driven to move by the extension of the electric telescopic rod 220, the half gears 211 are driven to rotate by the double-sided rack 221, the detection clamping piece 210 is driven to rotate by the half gears 211, and with the movement of the bolt 120, the water bag 230 on the detection clamping piece 210 wraps the bolt 120, the bolt 120 extrudes the water bag 230, and the water in the water bag 230 is extruded 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 the mechanical hand 130 is used to grab it.

[0035] Beneficial effects: the arc-shaped detection piece 142 detects the thread of the bolt 120, and after normal passing, the bolt 120 extrudes the water bag 230, the water bag 230 is extruded, and the liquid level of the detection column 231 rises, which can detect the bolt 120 smaller than the qualified one, and improve the detection accuracy.

[0036] Embodiment two: when the water bag 230 wraps the threaded part of the bolt 120, the water bag 230 may not wrap the pitch gap of the bolt 120, resulting in that the pitch gap of the bolt 120 remains too large, so that the detection is inaccurate; in view of the above technical problems, the technical scheme is proposed as follows:

[0037] As Figure 4As shown, the inner cross section of the water bag 230 is fixed with a film body 240, the film body 240 is made of thermoplastic elastomer TPE material; the film body 240 can be softened by heating and can be attached in the pitch gap of the bolt 120; a first cavity 241 is opened in the film body 240, the top of the first cavity 241 is connected with a connecting pipe 242; the end of the connecting pipe 242 is communicated with a micro water pump, and the first cavity 241 is filled with 60-70℃ water through the micro water pump; an electromagnetic valve 2421 is installed at the communication position of the connecting pipe 242 and the first cavity 241.

[0038] Specific implementation: open the electromagnetic valve 2421, fill the first cavity 241 in the film body 240 with 60-70℃ water, close the electromagnetic valve 2421 after filling, at this time, the pressure in the first cavity 241 increases, and the film body 240 is softened; when the bolt 120 enters the detection stage of the second detection assembly 200, the softened film body 240 on the water bag 230 can wrap the pitch gap of the bolt 120, improving the accuracy of detection.

[0039] One or more technical solutions provided in the application have at least the following technical effects or advantages:

[0040] The softened film body 240 on the water bag 230 can wrap the pitch gap of the bolt 120, improving the accuracy of detection.

[0041] Embodiment three: in order to avoid that the film body 240 wraps the thread top of the bolt 120 too tightly, which may cause the thread of the bolt 120 to scratch and damage the film body 240 for a long time; the application aims at the above technical problem and proposes the following technical solution, specifically:

[0042] As shown in Figure 5 The film body 240 is provided with a strip-shaped electromagnet 232 and iron powder 243, and the number and position of the strip-shaped electromagnet 232 and the iron powder 243 are one-to-one corresponding, the strip-shaped electromagnet 232 adsorbs the iron powder 243, so that the film 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 film body 240 is also provided with a plurality of strip-shaped grooves, the strip-shaped grooves are filled with iron powder 243, and are 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.

[0043] Specific implementation: open the electromagnetic valve 2421, fill the first cavity 241 in the membrane body 240 with water at 60-70℃, close the electromagnetic valve 2421 after filling, at this time, the pressure in the first cavity 241 increases, and the membrane body 240 softens; when the bolt 120 enters the detection stage of the second detection assembly 200, start the bar-shaped electromagnet 232, the bar-shaped electromagnet 232 magnetically attracts the iron powder 243, the surface of the membrane body 240 in contact with the threads of the bolt 120 is concave and threaded, so that the membrane body 240 wraps around the threads of the bolt 120 while leaving a gap at the position of the thread top of the bolt 120.

[0044] One or more technical solutions provided in the application have at least the following technical effects or advantages:

[0045] The membrane body 240 wraps around the threads of the bolt 120 while leaving a gap at the position of the thread top of the bolt 120, avoiding over-tight wrapping and scratching the membrane body 240 by the thread top of the bolt 120.

[0046] Embodiment four: when the thread width of the bolt 120 increases and the pitch also increases, it may cause misjudgment as a qualified piece in the detection of the second detection assembly 200; the application proposes the following technical solution to solve the above technical problem, specifically:

[0047] As shown in Figures 6 to 8 The second cavity 244 is close to the first cavity 241, and the third cavity 245 is away from the first cavity 241; the second cavity 244 contains 40℃ melted paraffin, and the third cavity 245 contains 80℃ softened paraffin; the top of the base 100 is symmetrically fixed with a shooting device 250; the shooting device 250 is close to the second detection assembly 200.

[0048] Specific implementation: S1: open the electromagnetic valve 2421, fill the first cavity 241 in the membrane body 240 with water at 60-70℃, close the electromagnetic valve 2421 after filling; 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.

[0049] S2: when the bolt 120 passes through the first detection assembly 140, when the bolt 120 enters the detection stage of the second detection assembly 200, start the bar-shaped electromagnet 232, the bar-shaped electromagnet 232 magnetically attracts the iron powder 243; the surface of the membrane body 240 in contact with the threads of the bolt 120 is concave and threaded, and the membrane body 240 wraps around the threads of the bolt 120.

[0050] S3: When the bolt 120 is separated from the wrapping of the membrane 240, the surface of the membrane 240 in contact with the thread of the bolt 120 forms the shape of the thread, and then the shape of the thread of the membrane 240 is calculated by the shooting device 250 to calculate whether the pitch and the size of the teeth are accurate.

[0051] One or more technical solutions provided in the present application have at least the following technical effects or advantages:

[0052] The cooperation of the melting of the paraffin in the second cavity 244 and the softening of the paraffin in the third cavity 245 enables the surface of the membrane 240 in contact with the thread of the bolt 120 to be shaped, but the paraffin in the third cavity 245 will not flow after being softened, and the shape of the surface of the membrane 240 in contact with the thread of the bolt 120 is calculated by the shooting device 250, and the shooting detection of the shooting device 250 can detect whether the width of the teeth and the pitch are accurate, further ensuring the accuracy of the thread detection of the bolt 120.

[0053] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bolt thread detection device, comprising a first detection assembly (140); the first detection assembly (140) comprises arc-shaped detection pieces (142), when the arc-shaped detection pieces (142) are driven to rotate by a gear (141), the inner concave surfaces of the two arc-shaped detection pieces (142) can be relatively flush, a bolt (120) enters the clamping space of the arc-shaped detection pieces (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 pieces (142) cannot rotate, characterized in that, further comprising a second detection assembly (200), which comprises two symmetrical half-cylindrical detection clamping pieces (210), a water bag (230) is fixed inside the detection clamping piece (210), when the bolt (120) passes through the first detection assembly (140) and falls into the clamping space of the second detection assembly (200), the water bag (230) is squeezed to drain water, when the amount of water is lower than a preset value, it is determined that the size of the bolt (120) is too small; further comprising a base (100) and a conveying device (110) arranged on the base (100); the inner cross section of the water bag (230) is fixed with a membrane body (240), the membrane body (240) is made of thermoplastic elastomer TPE material, the membrane body (240) is softened by heat and can be attached to the pitch gap of the bolt (120); the membrane body (240) is provided with a first cavity (241), the top of the first cavity (241) is connected with a connecting pipe (242), the distal end of the connecting pipe (242) is communicated with a micro water pump, 60-70℃ water is filled into the first cavity (241) through the micro water pump; an electromagnetic valve (2421) is installed at the communication position of the connecting pipe (242) and the first cavity (241); the membrane body (240) is provided with a strip-shaped electromagnet (232) and iron powder (243), and the number and position of the strip-shaped electromagnet (232) and the iron powder (243) are one-to-one corresponding, the strip-shaped electromagnet (232) adsorbs 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-shaped grooves, the strip-shaped grooves are filled with iron powder (243) and are 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); the membrane body (240) is also provided with a second cavity (244) and a third cavity (245), the second cavity (244) is close to the first cavity (241), the third cavity (245) is away from the first cavity (241), the second cavity (244) is filled with 40℃ melted paraffin, the third cavity (245) is filled with 80℃ softened paraffin, the top of the base (100) is symmetrically fixed with a shooting device (250), the shooting device (250) is close to the second detection assembly (200) and is used for shooting and calculating the shape of the contact surface between the membrane body (240) and the thread of the bolt (120). ​ ​ 2. A bolt thread inspection device as claimed in claim 1, wherein, The first detection assembly and the second detection assembly (200) are arranged at the lower end of the conveying device (110), the upper end of the conveying device (110) is provided with a mechanical hand (130); the gear (141) is installed on the top of the base (100) and located at the lower end of the conveying device (110); the arc-shaped detection piece (142) is fixed circumferentially on the gear (141); the inner section of the arc-shaped detection piece (142) is provided with a thread matched with the bolt (120); the upper arc-shaped detection piece (142) of the two gears (141) is used for detecting the thread of the bolt (120).

3. A bolt thread inspection device as claimed in claim 1, wherein, 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 lower part of the inner section of the detection piece (210) is symmetrically fixed with the half gear (211); the detection piece (210) is rotatably connected to the top of the base (100) through the half gear (211).

4. A bolt thread inspection apparatus as claimed in claim 3, wherein, The electric telescopic rod (220) is fixed on the base (100) and close to the detection piece (210); the output end of the electric telescopic rod (220) is fixed with the double-sided rack (221); the double-sided rack (221) is engaged with the two half gears (211).

5. A bolt thread inspection apparatus as claimed in claim 3, wherein, The upper part of the inner section of the detection piece (210) is fixed with the water bag (230); the top of the detection piece (210) is fixed with the detection column (231); the inside of the detection column (231) is a hollow transparent structure with a lower opening.

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