Fastener friction coefficient testing machine

Abstract

The utility model belongs to the technical field of threaded fastener friction coefficient testing equipment, and relates to a fastener friction coefficient testing machine which is characterized in that a servo motor transmission end penetrates through a protective cover shell and is connected with a dynamic torque sensor, a servo motor is connected with a clamping adjusting piece through the dynamic torque sensor, a movable nut clamping assembly is arranged in the protective cover shell, and the movable nut clamping assembly is connected with the clamping adjusting piece. The movable nut clamping assembly and the clamping adjusting piece are oppositely arranged, and a nut auxiliary device is installed on the side, close to the control display panel, of the protective cover shell. Through the clamping adjusting piece and the movable nut clamping assembly, the fastener friction coefficient testing machine can adapt to screws with different lengths and nuts with different sizes, the adaptability and the flexibility of equipment are greatly improved, the nut auxiliary device enables clamping operation to be easily carried out when the nuts are small, and the clamping efficiency is greatly improved. And the operation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded fastener friction coefficient testing equipment, in particular to a fastener friction coefficient testing machine. Background Art

[0002] Fasteners are a general term for a type of mechanical parts used to fasten two or more parts (or components) into a whole. Among them, threaded fasteners are widely used in various mechanical mechanisms because they are easy to disassemble and repair. They are one of the most widely used connection methods.

[0003] A device for testing the total friction coefficient of threaded fasteners disclosed in Chinese patent CN213091467U includes a support installed above the working box, and the support is fixedly connected to the working box, a first fixing plate and a second fixing plate are respectively installed on one side of the support, and the first fixing plate and the second fixing plate are both fixedly connected to the support, a first spring is installed below the first fixing plate, an upper clamping plate is installed below the first spring, the first fixing plate and the upper clamping plate are both fixedly connected to the first spring, a screw is installed below the first fixing plate, the first fixing plate and the second fixing plate are both fixedly connected to the screw, a second spring is installed above the second fixing plate, and a lower clamping plate is installed above the second spring, which effectively solves the problem that ordinary friction coefficient testing devices in the prior art cannot effectively fix threaded fasteners of different specifications.

[0004] However, while the above patent effectively solves the problem of threaded fasteners of different specifications, it cannot adjust the distance between the screw and the nut, cannot adapt to longer screws, and is difficult to clamp when the nut is small. It also has a high risk of not having protective equipment. Utility Model Content

[0005] In order to solve the problem that the existing fastener friction coefficient testing machine cannot adapt to longer screw rods and is difficult to perform clamping operations when the nut is small, the utility model provides a fastener friction coefficient testing machine.

[0006] The technical solution of the present utility model is achieved through the following solution: a fastener friction coefficient testing machine, including a work box, a table and a control display panel, the top surface of the work box is provided with a table, and a control display panel is protruding from one side of the work box, and a protective cover shell is provided on the table top. A servo motor is installed on the side of the protective cover shell away from the control display panel, and the transmission end of the servo motor passes through the protective cover shell and is connected to the dynamic torque sensor. The servo motor is connected to the clamping adjustment piece through the dynamic torque sensor. A movable nut clamping assembly is provided in the protective cover shell, and the movable nut clamping assembly and the clamping adjustment piece are arranged relative to each other. A nut auxiliary device is installed on the side of the protective cover shell close to the control display panel, and the servo motor, dynamic torque sensor, movable nut clamping assembly and nut auxiliary device are all communicatively connected to the control display panel.

[0007] Through the above technical solution, through the clamping adjustment piece and the movable nut clamping assembly, the fastener friction coefficient testing machine can adapt to screws of different lengths and nuts of different sizes, greatly improving the adaptability and flexibility of the equipment. The introduction of the nut auxiliary device enables the testing machine to easily perform clamping operations when the nut is small, reducing the difficulty of operation and improving work efficiency. The design of the protective cover effectively isolates the mechanical moving parts during the test process, reduces the safety risks of the operator, and improves the safety of equipment use.

[0008] Preferably, the movable nut clamping assembly includes a nut clamping assembly and an electric slide rail, the nut clamping assembly is movably mounted on the electric slide rail, and the nut auxiliary device is opposite to the center through hole of the nut clamping assembly.

[0009] Preferably, the nut clamping assembly includes a supporting block, a fixed claw plate and a control cylinder. The fixed claw plate is fixedly installed in the supporting block, the control cylinder drives the fixed claw plate, a through hole is opened in the center of the fixed claw plate, and the supporting block is movably installed on the electric slide rail.

[0010] Preferably, a hexagonal hole is opened on one side of the bearing block close to the clamping adjustment member, the gripping end of the fixed claw plate is located at the hexagonal hole, and the nut auxiliary device is opposite to the central through hole of the fixed claw plate.

[0011] Through the above technical solution, the combination of the nut clamping assembly and the electric slide rail enables the nut clamping assembly to move along the electric slide rail as needed, thereby adapting to screws of different lengths. The fixed claw plate can firmly grasp nuts of different sizes, thereby improving the flexibility and adaptability of the equipment. The gripping end of the fixed claw plate corresponds to the edge of the hexagonal hole, further ensuring the accuracy and stability of the clamping.

[0012] Preferably, the clamping adjustment member includes a placement head, a first tightening member, a second tightening member and a third tightening member. The placement head is fixedly mounted on the dynamic torque sensor. The placement head is a hexagon. The first tightening member, the second tightening member and the third tightening member are respectively located on the side of the placement head and are arranged at 120°.

[0013] Preferably, the nut auxiliary device includes a nut hanging part and a pushing cylinder, the nut hanging part is magnetically attracted to the telescopic end of the pushing cylinder, and the pushing cylinder is fixedly installed on the side of the protective cover shell.

[0014] Preferably, the protective cover shell is provided with a side door, and the nut auxiliary device, the clamping adjustment member and the movable nut clamping assembly are located on the same axis.

[0015] Through the above technical solution, the combination of the nut hanger and the pushing cylinder makes it possible to push the nut to the specified position through the pushing cylinder when clamping a nut that is smaller or difficult to operate directly, and then clamp it by the nut clamping assembly, thereby improving the convenience and stability of clamping.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. The utility model uses a clamping adjustment piece and a movable nut clamping assembly to enable the fastener friction coefficient tester to adapt to screws of different lengths and nuts of different sizes, greatly improving the adaptability and flexibility of the equipment. The introduction of the nut auxiliary device enables the tester to easily perform clamping operations when the nut is small, reducing the operating difficulty and improving work efficiency. The design of the protective cover effectively isolates the mechanical moving parts during the test process, reducing the safety risks of the operator and improving the safety of the equipment.

[0018] 2. The combination of the nut clamping assembly and the electric slide rail allows the nut clamping assembly to move along the electric slide rail as needed, thereby adapting to screws of different lengths. The fixed claw plate can firmly grasp nuts of different sizes, improving the flexibility and adaptability of the equipment. The gripping end of the fixed claw plate corresponds to the edge of the hexagonal hole, further ensuring the accuracy and stability of clamping.

[0019] 3. The combination of the nut hanger and the push cylinder allows the nut to be pushed to the specified position by the push cylinder when clamping a nut that is small or difficult to operate directly, and then clamped by the nut clamping assembly, thereby improving the convenience and stability of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2This is a schematic diagram of the three-dimensional structure of the utility model from a right perspective;

[0022] Figure 3 This is a schematic diagram of the working assembly structure of the nut clamping component and the nut auxiliary device of the utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the nut auxiliary device of the utility model;

[0024] Figure 5 yes Figure 2 A magnified schematic diagram of the structure at point A.

[0025] Explanation of the accompanying drawings: 1. Work box; 2. Table; 3. Servo motor; 4. Clamping adjustment member; 41. Placement head; 42. First tightening member; 43. Second tightening member; 44. Third tightening member; 5. Nut clamping assembly; 51. Carrying block; 52. Fixed claw plate; 53. Control cylinder; 6. Electric slide rail; 7. Dynamic torque sensor; 8. Control display panel; 9. Protective cover; 10. Nut auxiliary device; 101. Nut hanging member; 102. Push cylinder. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure. The present invention is further described in detail below with reference to the accompanying drawings.

[0028] A fastener friction coefficient testing machine, such as Figure 1-5As shown, it includes a work box 1, a table 2 and a control display panel 8. The top surface of the work box 1 is provided with a table 2, and a control display panel 8 is protruding from one side of the work box 1. A protective cover shell 9 is provided on the table 2. A servo motor 3 is installed on the side of the protective cover shell 9 away from the control display panel 8. The driving end of the servo motor 3 passes through the protective cover shell 9 and is connected to the dynamic torque sensor 7. The servo motor 3 is connected to the clamping adjustment member 4 through the dynamic torque sensor 7. A movable nut clamping assembly is provided in the protective cover shell 9. The movable nut clamping assembly and the clamping adjustment member 4 are arranged relative to each other. A nut auxiliary device 10 is installed on the side of the protective cover shell 9 close to the control display panel 8. The servo motor 3, the dynamic torque sensor 7, the movable nut clamping assembly and the nut auxiliary device 10 are all communicatively connected to the control display panel 8. A control processor is provided in the work box 1. The control processor consists of a data acquisition and measurement control system, a computer and its data analysis and processing test software, and other necessary loading brackets and accessories. The data measured by the torque sensor 7 will be processed and calculated by the control processor, and the friction coefficient will be measured eventually. The protective cover shell 9 is provided with a side door, which is convenient for opening and closing for loading and unloading. The protective cover shell 9 effectively isolates the workpiece and reduces the risk of accidental injury during operation. The nut auxiliary device 10, the clamping adjustment part 4 and the movable nut clamping assembly are located on the same axis. The nut auxiliary device 10 effectively solves the inconvenience of clamping smaller nuts. It is only necessary to hang the nut. The nut auxiliary device 10 passes through the center through hole of the movable nut clamping assembly. After the movable nut clamping assembly is clamped, it is only necessary to remove the nut hanging part 101 in the nut auxiliary device 10 to recycle the pushing cylinder 102. The close cooperation between the nut auxiliary device 10 and the nut clamping assembly 5 makes it possible to easily complete the clamping operation without manual support of workers when clamping smaller or difficult-to-manually-supported nuts. This not only reduces the need for manual intervention, but also reduces the risk of accidental injury during operation and improves safety.

[0029] The movable nut clamping assembly includes a nut clamping assembly 5 and an electric slide 6. The nut clamping assembly 5 is movably mounted on the electric slide 6. The nut auxiliary device 10 is facing the central through hole of the nut clamping assembly 5, which can easily adapt to fasteners of different lengths. The electric slide 6 enables the nut clamping assembly 5 to move freely in the horizontal direction, thereby adjusting according to the actual position of the fastener, greatly improving the adaptability and flexibility of the system. The nut clamping assembly 5 includes a bearing block 51, a fixed claw plate 52 and a control cylinder 53. The fixed claw plate 52 is fixedly mounted in the bearing block 51. The control cylinder 53 drives the fixed claw plate 52. The center of the fixed claw plate 52 is opened. Through hole, the bearing block 51 is movably installed on the electric slide rail 6, the through hole of the fixed claw plate 52 is adapted to the nut auxiliary device 10, and the nut clamping assembly 5 adopts a pneumatic claw plate design, which is driven by the control cylinder 53 to ensure precise clamping of the nut. A hexagonal hole is opened on the side of the bearing block 51 close to the clamping adjustment part 4, and the gripping end of the fixed claw plate 52 is located at the hexagonal hole. The nut auxiliary device 10 is facing the center through hole of the fixed claw plate 52. The hexagonal hole is convenient for placing the nut. The fixed claw plate 52 clamps the nut with six claws, which not only increases the stability of the clamping, but also improves the uniformity of the clamping, and reduces the risk of damage or falling off of the nut due to unstable clamping.

[0030] The clamping adjustment member 4 includes a placement head 41, a first tightening member 42, a second tightening member 43 and a third tightening member 44. The placement head 41 is fixedly mounted on the dynamic torque sensor 7. The placement head 41 is a hexagon. The first tightening member 42, the second tightening member 43 and the third tightening member 44 are respectively located on the side of the placement head 41 and are arranged at 120 degrees. Since the placement head 41 and the bearing block 51 are both provided with the same hexagonal hole, when the nut is not very small, the fastener nut can be installed in reverse, which improves the test flexibility and improves the practicality. The first tightening member 42. The second tightening member 43 and the third tightening member 44 have the same structure, both consisting of a handle, a reference member, a threaded rod and a back plate. The reference member is provided with a scale position, wherein one part of the handle is an extension rod, and the extension rod is opposite to the scale position of the reference member. During the tightening process, the staff can intuitively judge the degree of tightening by the relative position of the scale position and the extension rod, thereby ensuring that the tightening process of the three tightening members remains consistent, reducing the test error caused by uneven tightening, improving the accuracy and reliability of the test, and simplifying the judgment steps during the operation.

[0031] The nut auxiliary device 10 includes a nut hanger 101 and a pushing cylinder 102. The nut hanger 101 is magnetically attracted to the telescopic end of the pushing cylinder 102. The pushing cylinder 102 is fixedly installed on the side of the protective cover shell 9. The nut hanger 101 is a T-shaped cylinder composed of two cylinders, and a magnetic sheet is provided at the assembly point with the telescopic end of the pushing cylinder 102 for magnetic attraction. When the nut is small for assembly, the nut is hung on the long leg section of the T-shaped cylinder, and further magnetically attracted to the pushing cylinder 102. It is pushed to the clamping end of the nut clamping assembly 5 through the pushing cylinder 102, and the nut clamping assembly 5 can move freely on the electric slide rail 6 for fine-tuning. At this time, clamping can be easily performed, reducing manual intervention. After clamping, you only need to pull out the nut hanger 101 to put it away.

[0032] The parts and equipment all adopt conventional models in the existing technology, and the circuit connections adopt conventional connection methods in the existing technology, which will not be described in detail here. The content not described in detail in this manual belongs to the existing technology known to professional and technical personnel in this field.

[0033] Working principle: The staff opens the side door of the protective cover 9 and places the fastener in the placement head 41 on the clamping adjustment member 4. At this time, the three tightening members on it are adjusted to clamp it. The nut is placed in the hexagonal hole of the bearing block 51. The fixed claw plate 52 is controlled by the control cylinder 53 to tighten and clamp the nut. At this time, the actual position of the fastener is adjusted. The nut clamping assembly 5 moves freely in the horizontal direction through the electric slide until it reaches the appropriate position. The side door of the protective cover 9 is closed, the servo motor 3 is started, the fastener and nut are tightened, and the dynamic torque sensor 7 is used to detect it.

[0034] When the nut is small, the staff removes the nut hanger 101, strings the small nut to the long leg section of the nut hanger 101, and further adsorbs the nut hanger 101 back to the telescopic end of the pushing cylinder 102. The pushing cylinder 102 pushes, and the nut clamping assembly 5 is adjusted on the electric slide rail 6 until it is in the appropriate position. At this time, the telescopic end of the pushing cylinder 102 extends with the nut, and passes through the central through hole of the fixed claw plate 52 to reach the gripping end of the fixed claw plate 52. The control cylinder 53 is further started to clamp the fixed claw plate 52. After clamping, the nut hanger 101 is pulled out, and the telescopic end of the pushing cylinder 102 contracts to complete the auxiliary clamping.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fastener friction coefficient testing machine, comprising a working box (1), a table (2) and a control display panel (8), wherein the working box (1) is provided with a table (2) on the top surface, and a control display panel (8) is protruding from one side of the working box (1), characterized in that: A protective cover (9) is provided on the table (2), and a servo motor (3) is installed on the side of the protective cover (9) away from the control display panel (8), and the driving end of the servo motor (3) passes through the protective cover (9) and is connected to the dynamic torque sensor (7), and the servo motor (3) is connected to the clamping adjustment member (4) through the dynamic torque sensor (7). A movable nut clamping assembly is provided in the protective cover (9), and the movable nut clamping assembly and the clamping adjustment member (4) are arranged relative to each other. A nut auxiliary device (10) is installed on the side of the protective cover (9) close to the control display panel (8), and the servo motor (3), the dynamic torque sensor (7), the movable nut clamping assembly and the nut auxiliary device (10) are all communicatively connected to the control display panel (8).

2. A fastener friction coefficient testing machine according to claim 1, characterized in that: The movable nut clamping assembly comprises a nut clamping assembly (5) and an electric slide rail (6), wherein the nut clamping assembly (5) is movably mounted on the electric slide rail (6), and the nut auxiliary device (10) faces the central through hole of the nut clamping assembly (5).

3. A fastener friction coefficient testing machine according to claim 2, characterized in that: The nut clamping assembly (5) comprises a bearing block (51), a fixed claw plate (52) and a control cylinder (53), wherein the fixed claw plate (52) is fixedly mounted in the bearing block (51), and the control cylinder (53) drives the fixed claw plate (52), wherein a through hole is provided at the center of the fixed claw plate (52), and the bearing block (51) is movably mounted on an electric slide rail (6).

4. A fastener friction coefficient testing machine according to claim 3, characterized in that: A hexagonal hole is formed on one side of the bearing block (51) close to the clamping adjustment member (4), the gripping end of the fixed claw plate (52) is located at the hexagonal hole, and the nut auxiliary device (10) faces the central through hole of the fixed claw plate (52).

5. The fastener friction coefficient testing machine according to claim 1, characterized in that: The clamping adjustment member (4) comprises a placement head (41), a first tightening member (42), a second tightening member (43) and a third tightening member (44); the placement head (41) is fixedly mounted on the dynamic torque sensor (7); the placement head (41) is a hexagon; the first tightening member (42), the second tightening member (43) and the third tightening member (44) are respectively located on the side of the placement head (41) and are arranged at 120 degrees.

6. The fastener friction coefficient testing machine according to claim 1, characterized in that: The nut auxiliary device (10) comprises a nut hanging member (101) and a pushing cylinder (102), wherein the nut hanging member (101) is magnetically attracted to the telescopic end of the pushing cylinder (102), and the pushing cylinder (102) is fixedly mounted on the side of the protective cover shell (9).

7. The fastener friction coefficient testing machine according to claim 1, characterized in that: The protective cover shell (9) is provided with a side door, and the nut auxiliary device (10), the clamping adjustment member (4) and the movable nut clamping assembly are located on the same axis.

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