Bolt thread quality automatic detection equipment

Abstract

The utility model discloses a kind of bolt thread quality automation detection equipment, including detection device, detection device includes detection head, detection head includes main shaft, spring is arranged below main shaft, detection shaft is arranged below spring, transmission sleeve that main shaft and detection shaft outside are set relatively main shaft can float up and down, the lower end of detection shaft is equipped with thread hole;Main shaft is connected with third motor;Detection head, third motor are installed on sliding seat;Detection device further includes lifting drive device, lifting drive device is connected with sliding seat transmission, lifting drive device is installed on fixed base, fixed base is installed on slide rail and can be driven along slide rail by fourth motor, two conveyors are arranged below detection device, two conveyors are respectively arranged according to the preset step length and are cyclically moved jig, jig is used to fix bolt.The utility model can realize the automation detection of bolt thread quality, improve bolt thread quality detection efficiency, and can avoid invalid detection caused by human factor.

Description

Technical Field

[0001] This utility model relates to the field of bolt inspection technology, specifically to an automated bolt thread quality inspection device. Background Technology

[0002] A bolt is a mechanical fastener consisting of a head and a threaded shank. It is used in conjunction with a nut to connect two parts with through holes, and is a detachable connection method. Its core function is to achieve fastening through its threaded structure, and it is widely used in machinery manufacturing, construction engineering, power equipment, and other fields.

[0003] After bolt production is completed, the bolt threads need to be inspected for quality. Current conventional inspection methods include: one, manually screwing a matching nut onto the bolt and checking if it can be screwed in smoothly to check the thread quality; and two, using an electric wrench to screw the nut onto the bolt, with a similar inspection principle. However, existing manual inspection methods are not only inefficient but also prone to ineffective inspections due to workers not screwing the nut in according to the specified stroke, resulting in defective products entering the market. Utility Model Content

[0004] This invention provides an automated bolt thread quality inspection device, which can improve the efficiency of bolt thread quality inspection, reduce labor costs, and avoid invalid inspections caused by human factors.

[0005] The technical solution of this utility model is as follows:

[0006] An automated bolt thread quality inspection device includes an inspection unit, which includes an inspection head and a main shaft. A spring is disposed below the main shaft, and an inspection shaft is disposed below the spring. The main shaft and the inspection shaft are connected by a transmission sleeve, which can float up and down relative to the main shaft and is fixed relative to the inspection shaft. The lower end of the inspection shaft has a threaded hole. The main shaft is connected to a third motor. The inspection head and the third motor are mounted on a sliding seat. The inspection unit also includes a lifting drive device, which is connected to the sliding seat and is mounted on a fixed seat. The fixed seat is mounted on a slide rail and can be driven by a fourth motor to move laterally along the slide rail. A first conveyor and a second conveyor are disposed below the inspection unit. The first and second conveyors are respectively equipped with groups of fixtures that move cyclically according to a set step length. The fixtures are used to fix bolts.

[0007] This invention features a detection head with a floating transmission sleeve and springs at both ends that abut against the main shaft and the detection shaft, respectively. Driven by a third motor and a lifting drive, when the bolt thread quality is acceptable, the detection shaft can smoothly screw in and out after the detection head is pressed down. If the thread quality is unacceptable, the detection shaft will jam during the screwing-in process, thus achieving automated detection of bolt thread quality. Simultaneously, this invention utilizes the detection device, slide rail, first conveyor, and second conveyor to classify and store acceptable and unacceptable bolts. Compared to existing technologies, this invention eliminates the need for manual inspection, achieving a high degree of automation, high inspection efficiency, and avoiding the problem of ineffective manual inspection.

[0008] As an optimization, in the aforementioned automated bolt thread quality inspection equipment, the main shaft is equipped with an upper pin, the detection shaft with a lower pin, and the transmission sleeve has an elongated hole corresponding to the position of the upper pin, allowing the upper pin to move within the elongated hole; the transmission sleeve also has a pin hole corresponding to the position of the lower pin for fixing the lower pin. This transmission sleeve design is simple and easy to manufacture. The transmission sleeve can float up and down relative to the main shaft. Since the transmission sleeve is fixed to the detection shaft, the detection shaft can float up and down relative to the main shaft, thus enabling it to be smoothly screwed into the bolt under the drive of a third motor, achieving thread quality inspection.

[0009] As an optimization, in the aforementioned automated bolt thread quality inspection equipment, the fixture is provided with bolt positioning holes, the shape and size of which are adapted to the head of the bolt. The bolt positioning holes are used for bolt positioning and fixing. In this embodiment of the invention, the bolt positioning holes are internal hexagonal blind holes.

[0010] As an optimization, in the aforementioned automated bolt thread quality inspection equipment, the lifting drive device is a cylinder.

[0011] As an optimization, in the aforementioned automated bolt thread quality inspection device, a first storage box is provided below the conveying end of the first conveyor; and a second storage box is provided below the conveying end of the second conveyor. The first storage box is used to store bolts with substandard thread quality, and the second storage box is used to store bolts with acceptable thread quality.

[0012] As an optimization, in the aforementioned automated bolt thread quality inspection equipment, both the first and second conveyors are chain plate conveyors; the fixture is mounted on the chain plate of the conveyor.

[0013] As an optimization, in the aforementioned automated bolt thread quality inspection equipment, the slide rail is fixed to a crossbar, and both ends of the crossbar are respectively fixed to the tops of two columns. The two columns and the crossbar form a support frame for fixing the slide rail and the inspection device, which is stable and easy to implement.

[0014] The technical effects of this utility model are: to realize automated detection of bolt thread quality, improve the efficiency of bolt thread quality detection, reduce labor costs, and avoid ineffective manual detection. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the automated bolt thread quality testing equipment of this utility model.

[0016] Figure 2 This is a utility model Figure 1 An enlarged schematic diagram of part A in an automated bolt thread quality inspection device.

[0017] Figure 3 This is a schematic diagram of the structure of the detection head of this utility model.

[0018] Figure 4 This is a schematic diagram of the detection head of this utility model, omitting the transmission sleeve.

[0019] Figure 5 This is a cross-sectional schematic diagram of the lower part of the detection head of this utility model, the bolt, and the fixture.

[0020] The markings in the attached diagram are as follows: 1-Bracket; 11-Column; 12-Horizontal bar; 2-Bolt; 3-First conveyor; 31-First motor; 32-First conveyor support; 4-Second conveyor; 41-Second motor; 42-Second conveyor support; 5-Jig; 51-Bolt positioning hole; 6-First storage box; 7-Second storage box; 8-Slide rail; 9-Detection device; 91-Fixed seat; 92-Third motor; 93-Fourth motor; 94-Lifting drive device; 95-Detection head; 96-Sliding seat; 951-Main shaft; 952-Detection shaft; 9521-Threaded hole; 953-Transmission sleeve; 954-Upper pin; 955-Lower pin; 956-Spring; 957-Long slotted hole. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings, but this should not be construed as limiting the present utility model. Contents not described in detail in the following embodiments are all common knowledge in the art or can be implemented using conventional technical means in the art.

[0022] For details of the specific embodiments of this utility model, please refer to... Figures 1-5 .

[0023] like Figure 1 , Figure 2As shown, an automated bolt thread quality inspection device includes a support 1, which consists of two columns 11 and a crossbar 12 mounted on top of the two columns 11. A slide rail 8 is fixed to one side of the crossbar 12, and a detection device 9 is mounted on the slide rail 8. The detection device 9 can slide along the slide rail 8 under the drive of a fourth motor 93. A first conveyor 3 and a second conveyor 4 are located below the crossbar 12 and between the two columns 11. The first conveyor 3 is a chain plate conveyor, including a first motor 31 for driving the chain plate to circulate and a first conveyor support 32 for support. The second conveyor 4 is a chain plate conveyor, including a second motor 41 for driving the chain plate to circulate and a second conveyor support 42 for support. A first storage box 6 is located below the conveying end of the first conveyor 3; a second storage box 7 is located below the conveying end of the second conveyor 4. The first conveyor 3 and the second conveyor 4 are equipped with fixtures 5 on their chain plates. Each fixture 5 has a bolt positioning hole 51, which is a blind hexagonal socket for fixing bolts 2. Untested bolts 2 are placed in the bolt positioning hole 51 of the fixture 5 on the second conveyor 4. As the second conveyor 4 intermittently runs, it passes under the testing device 9 for testing. Bolts 2 that pass the test fall into the second collection box 7 under gravity at the end of the second conveyor 4. Bolts 2 that fail the test are lifted by the testing device 9, transferred to the first conveyor 3, and finally collected in the first collection box 6.

[0024] like Figure 2 As shown, the detection device 9 is mounted on the slide rail 8 via a fixed base 91 and can move along the slide rail 8. The detection device 9 also includes a third motor 92, a fourth motor 93, a lifting drive device 94, a detection head 95, and a sliding seat 96. The third motor 92 and the detection head 95 are mounted on the sliding seat 96, which is located below the fixed base 91 and can slide vertically. The fourth motor 93 and the lifting drive device 94 are mounted on the fixed base 91. The lifting drive device 94 is connected to the sliding seat 96 via a transmission connection; in this embodiment, the lifting drive device 94 is a cylinder. The detection head 95 is connected to the third motor 92, which can drive the detection head 95 to rotate forward and backward. The fourth motor 93 is used to drive the detection device 9 to move along the slide rail 8 (in this embodiment, a gear and rack transmission mechanism is used).

[0025] like Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the detection head 95 includes a main shaft 951, which is connected to a third motor 92 and driven to rotate forward and backward. A spring 956 is disposed below the main shaft 951, and a detection shaft 952 is disposed at the lower end of the spring 956. The two ends of the spring 956 abut against the main shaft 951 and the detection shaft 952, respectively. The main shaft 951 has an upper pin 954, and the detection shaft 952 has a lower pin 955. The detection head 95 also includes a transmission sleeve 953. The upper part of the transmission sleeve 953 has an elongated hole 957 corresponding to the position of the upper pin 954. The upper pin 954 can slide within the elongated hole 957, allowing the detection shaft 952 to float relative to the main shaft 951. The lower part of the transmission sleeve 953 has a pin hole corresponding to the position of the lower pin 955, and the lower pin 955 is fixed by engaging with the pin hole. In addition, corresponding to bolt 2, the detection shaft 952 is provided with a matching threaded hole 9521, which is used to cooperate with bolt 2 to detect the thread quality of bolt 2.

[0026] During operation, the lifting drive device 94 drives the detection head 95 to descend. During the descent, the detection shaft 952 comes into contact with the bolt 2 and cannot move further down. The main shaft 951 continues to move downward a certain distance, compressing the spring 956. Then, the third motor 92 drives the detection head 95 to rotate clockwise (the third motor 92 drives the main shaft 951 to rotate, and the main shaft 951 drives the detection shaft 952 to rotate via the transmission sleeve 953), screwing the detection shaft 952 into the bolt 2. After the detection is completed, the third motor 92 drives the detection head 95 to rotate counterclockwise, unscrewing the detection shaft 952 out of the bolt 2. The ability of the detection shaft 952 to float relative to the main shaft 951 is key to achieving the screwing-in and screwing-out action. If the detection shaft 952 is fixed relative to the main shaft 951, it cannot descend during the screwing-in action, thus preventing it from being screwed into the bolt 2.

[0027] The working process of this utility model is as follows: The first motor 31 and the second motor 41 are started, and the first conveyor 3 and the second conveyor 4 operate intermittently at a fixed frequency. The bolt 2 to be tested is placed in the bolt positioning hole 51 of the fixture 5 on the second conveyor 4 (it can be manually fed or a special feeding machine can be set up to complete the feeding). When the bolt 2 to be tested moves to the bottom of the testing device 9, the lifting drive device 94 drives the testing head 95 to descend again. The lower end of the testing shaft 952 presses against the bolt 2, and the spring 956 is compressed (the testing shaft 952 floats upward relative to the main shaft 951). The third motor 92 drives the testing head 95 to rotate according to the set torque and speed. If the testing shaft 952 can be smoothly screwed into the bolt 2, the thread quality of the bolt 2 is qualified. The third motor 92 drives the testing head 95 to reverse, so that the testing shaft 952 is screwed away from the bolt 2. Then the testing head 95 rises under the action of the lifting drive device 94. The qualified bolt 2 moves with the second conveyor 4 until it falls into the second storage box 7. If the detection head 95 gets stuck during screwing in, the lifting drive device 94 drives the detection head 95 to rise, lifting the defective bolt 2. Then, the fourth motor 93 drives the detection device 9 to move along the slide rail 8 above the first conveyor 3. Next, the lifting device 94 drives the detection head to descend, placing the bolt 2 into the bolt positioning hole 51 on the fixture 5 of the first conveyor 3. Then, the third motor 92 is started to reverse and screw the detection shaft 952 out. The defective bolt 2 moves with the first conveyor 3 until it falls into the first storage box 6.

[0028] The foregoing general description of the utility model and its specific embodiments should not be construed as limiting the technical solution of the utility model. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the utility model, to form other technical solutions within the protection scope of this utility model.

Claims

1. An automated bolt thread quality inspection device, characterized in that: The device includes a detection device (9), which includes a detection head (95). The detection head (95) includes a main shaft (951). A spring (956) is disposed below the main shaft (951), and a detection shaft (952) is disposed below the spring (956). The main shaft (951) and the detection shaft (952) are connected by a transmission sleeve (953). The transmission sleeve (953) can float up and down relative to the main shaft (951) and is fixed relative to the detection shaft (952). The lower end of the detection shaft (952) is provided with a threaded hole (9521). The main shaft (951) is connected to a third motor (92). The detection head (951) is connected to the detection head (952). The third motor (92) is mounted on the sliding seat (96); the detection device (9) also includes a lifting drive device (94), which is connected to the sliding seat (96) in a transmission manner. The lifting drive device (94) is mounted on a fixed seat (91), which is mounted on a slide rail (8) and can be driven by a fourth motor (93) to move laterally along the slide rail (8); a first conveyor (3) and a second conveyor (4) are provided below the detection device (9). The first conveyor (3) and the second conveyor (4) are respectively equipped with fixtures (5) that move cyclically according to a set step length. The fixtures (5) are used to fix the bolts (2).

2. The automated bolt thread quality inspection equipment according to claim 1, characterized in that: The main shaft (951) is provided with an upper pin (954), the detection shaft (952) is provided with a lower pin (955), and the transmission sleeve (953) is provided with an elongated hole (957) corresponding to the position of the upper pin (954). The upper pin (954) can move within the elongated hole (957). The transmission sleeve (953) is provided with a pin hole corresponding to the position of the lower pin (955) for fixing the lower pin (955).

3. The automated bolt thread quality inspection equipment according to claim 1, characterized in that: The fixture (5) is provided with bolt positioning holes (51), the shape and size of which are adapted to the head of the bolt (2).

4. The automated bolt thread quality inspection equipment according to claim 1, characterized in that: The lifting drive device (94) is a cylinder.

5. The automated bolt thread quality inspection equipment according to claim 1, characterized in that: A first storage box (6) is provided below the conveying end of the first conveyor (3); a second storage box (7) is provided below the conveying end of the second conveyor (4).

6. The automated bolt thread quality inspection equipment according to claim 5, characterized in that: The first conveyor (3) and the second conveyor (4) are both chain plate conveyors; the fixture (5) is located on the chain plate of the conveyor.

7. An automated bolt thread quality inspection device according to any one of claims 1-6, characterized in that: The slide rail (8) is fixed on the crossbar (12), and the two ends of the crossbar (12) are respectively fixed to the top of the two columns (11).

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