Simple static friction coefficient detection device

Abstract

The utility model discloses a simple static friction coefficient detection device which comprises a main body frame, a detection frame and a transmission assembly, one end of the detection frame is rotatably connected with the main body frame, the transmission assembly comprises a linear driving mechanism arranged along the plane where the main body frame is located, and the linear driving mechanism linearly drives a sliding piece. A transmission connecting rod is connected between the sliding piece and the detection frame so as to drive the detection frame to rotate when the sliding piece is linearly driven by the linear driving mechanism, a positioning part is arranged on the detection frame, the positioning part enables a to-be-detected pipeline to be perpendicular to the rotating axis of the detection frame, and the detection frame is provided with a restraining piece for pressing the to-be-detected pipeline on the positioning part. The device has the advantages of being simple in structure, low in use cost, convenient to position the pipeline to be detected and capable of improving detection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of static friction coefficient detection devices, in particular to a simple static friction coefficient detection device. Background Art

[0002] The static friction coefficient of the inner wall of a communication tube affects the cable's passage, and therefore requires testing. The existing STT-970 testing device is complex and expensive, making testing costly for general use.

[0003] The Chinese patent application, with publication number CNCN110411939A, published on November 5, 2019, is titled "A Pipeline Static Friction Coefficient Testing Device and Method." The patent includes a base, a test platform, an angle adjustment mechanism, an adsorption component, a limit switch, and an angle measurement component. The adsorption component is mounted between the pipeline positioning component and the free end of the test platform. The adsorption component and the pipeline positioning component are correspondingly arranged, and the angle adjustment mechanism and the angle measurement component are both electrically connected to the limit switch. The application clamps the pipeline to be tested using a first pneumatic clamp. Only one pipe can be tested at a time, and only for a single specification. This results in low testing efficiency for the production department's multiple specifications and multiple sampling inspections. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a simple static friction coefficient detection device, which has a simple structure, low use cost, is convenient for positioning the pipeline to be tested, and improves detection efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A simple static friction coefficient detection device includes a main frame, a detection frame and a transmission assembly. One end of the detection frame is rotatably connected to the main frame. The transmission assembly includes a linear drive mechanism arranged along the surface of the main frame. The linear drive mechanism linearly drives a sliding member. A transmission connecting rod is connected between the sliding member and the detection frame to drive the detection frame to rotate when the sliding member is linearly driven by the linear drive mechanism. The detection frame is provided with a positioning part, which makes the pipeline to be tested perpendicular to the rotation axis of the detection frame. The detection frame is equipped with a constraint member that presses the pipeline to be tested against the positioning part.

[0007] When the static friction coefficient of the pipeline to be tested is tested, it is fixed to the positioning part by a restraint. The positioning function of the positioning part makes the pipeline to be tested perpendicular to the rotation axis of the detection frame. The detection frame is initially set to a horizontal state. The test rod is placed in the pipeline to be tested. When the linear drive mechanism in the transmission assembly is activated, the sliding member slides and drives the detection frame to rotate slowly through the transmission connecting rod. The test rod is freely set in the pipeline to be tested. When the test rod slides down, the linear drive mechanism stops, and the angle measuring device is used to measure the inclination angle of the detection frame. According to the inclination angle, the corresponding static friction coefficient can be calculated according to the relevant calculation formula. The restraint part cooperates with the positioning part to conveniently position the pipeline to be tested, thereby improving the detection efficiency. The overall structure of the device is simple, the number of components is small, and the manufacturing and use costs are low. The positioning part can be set in multiple groups on the detection frame, so that multiple groups of different pipes with different specifications can be tested together, and the detection efficiency is high.

[0008] Preferably, the detection frame includes a first rod and a second rod in parallel. The first rod is provided with a first positioning block having a positioning portion, and the second rod is provided with a second positioning block having a positioning portion. The positioning portion on the first positioning block and the positioning portion on the second positioning block are arranged coplanarly. The first positioning block and the second positioning block respectively secure the ends of the pipeline to be tested, thereby reliably positioning and securing the pipeline to be tested.

[0009] Preferably, the positioning portion is in the shape of a "V"-shaped surface, so as to realize automatic centering of the pipeline to be tested and ensure that the pipeline to be tested thereon is perpendicular to the rotation axis of the detection frame.

[0010] Preferably, the restraining member is a cloth belt buckle with adjustable cloth belt length. The length of the cloth belt buckle can be adjusted to fix pipelines of different specifications to be tested, without the need for frequent replacement of clamps, and the clamping is convenient and fast.

[0011] Preferably, the linear drive mechanism includes a matching transmission screw and a transmission nut, the transmission nut is fixedly connected to the sliding member, a guide rod parallel to the transmission screw is provided on the side of the transmission screw, the sliding member is slidingly connected to the guide rod, and when the transmission screw rotates, the transmission nut and the sliding member are driven to slide along the guide rod.

[0012] Preferably, guide rods are respectively provided on opposite sides of the transmission screw rod, so as to realize reliable guidance of the transmission screw rod sliding rod through the two guide rods.

[0013] Preferably, the main frame is provided with a convex portion protruding toward one side thereof, and one end of the detection frame is rotatably connected to the convex portion. The convex portion provides a space for the detection frame to be rotated, thereby achieving position avoidance of the rotation end of the detection frame.

[0014] Preferably, the detection frame is provided with a mounting rod parallel to the first rod and the second rod, and the transmission connecting rod rotatably connects the sliding member and the mounting rod. By connecting the mounting rod to the transmission rod, the detection frame as a whole is a frame structure composed of rods, which is both strong and inexpensive and easy to install.

[0015] Preferably, the detection frame is perpendicular to the main frame at its turning limit position, which can achieve an angle change of 0-90 degrees, ensuring the reliability of static friction coefficient detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a simple static friction detection device disclosed in one embodiment of the present utility model;

[0017] Figure 2 This is a structural diagram of a first positioning block in a simple static friction detection device disclosed in one embodiment of the present utility model;

[0018] Figure 3 yes Figure 1 Enlarged schematic diagram of point A in the middle.

[0019] In the figure: main frame 1, first rod 2, second rod 3, mounting rod 4, fixing rod 5, first positioning block 6, second positioning block 7, positioning portion 8, cloth belt buckle 9, sliding member 10, transmission screw 11, mounting groove 12, transmission connecting rod 13, guide rod 14, protrusion 15. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] As one of the embodiments of the present invention, a simple static friction coefficient detection device is disclosed, such as Figures 1 to 3 As shown, it includes a main frame 1, a detection frame and a transmission assembly. One end of the detection frame is rotatably connected to the main frame 1. The transmission assembly includes a linear drive mechanism arranged along the surface of the main frame 1. The linear drive mechanism linearly drives a sliding member 10. A transmission connecting rod 13 is connected between the sliding member 10 and the detection frame to drive the detection frame to rotate when the sliding member 10 is linearly driven by the linear drive mechanism. A positioning part 8 is provided on the detection frame. The positioning part 8 makes the pipeline to be tested perpendicular to the rotation axis of the detection frame. The detection frame is equipped with a constraint member to press the pipeline to be tested against the positioning part 8.

[0022] When the static friction coefficient of the pipeline to be tested is tested, it is fixed on the positioning part 8 by a constraint. The positioning function of the positioning part 8 makes the pipeline to be tested perpendicular to the rotation axis of the detection frame. The detection frame is initially set to a horizontal state. The test rod is placed in the pipeline to be tested. When the linear drive mechanism in the transmission assembly is activated, the sliding member 10 slides and drives the detection frame to rotate slowly through the transmission connecting rod 13. The test rod is freely set in the pipeline to be tested. When the test rod slides down, the linear drive mechanism stops. The angle measuring device is used to measure the inclination angle of the detection frame. According to the inclination angle, the corresponding static friction coefficient can be calculated according to the relevant calculation formula. The specific calculation process can be directly carried out in the corresponding data calculation component, the processing component has a built-in calculation program, and the angle measurement component, such as an angle sensor, directly transmits the inclination angle data to the data calculation component for calculation. The inclination angle value measured by the angle measurement component can also be displayed and stored, and then other means are used to calculate the static friction coefficient of the pipeline to be tested.

[0023] The restraining member cooperates with the positioning portion 8 to conveniently position the pipeline to be tested, thereby improving the detection efficiency. The overall structure of the device is simple, the number of components is small, and the manufacturing and use costs are low. Multiple groups of positioning portions 8 can be set on the detection frame, thereby enabling the detection of multiple groups of pipelines of different specifications at the same time, with high detection efficiency.

[0024] In this embodiment, the main frame 1 serves as the supporting structure, upon which the detection frame and transmission assembly are mounted. Both the main frame 1 and the detection frame are frame structures, resulting in low material costs. The linear drive mechanism slides at a relatively low speed during testing, ensuring reliable measurement of the static friction coefficient within the pipeline. The positioning portion 8 is positioned perpendicular to the detection frame's rotation axis, ensuring that the pipeline remains perpendicular to the axis during rotation, enabling reliable measurement of the static friction coefficient of the pipeline's inner wall.

[0025] As one of the embodiments of the present invention, a simple static friction coefficient detection device is disclosed, such as Figure 1As shown, the detection frame includes a first rod 2 and a second rod 3 in parallel. The two ends of the first rod 2 and the second rod 3 are respectively connected by a fixing rod 5. The first rod 2 and the second rod 3 are both parallel to the rotation axis of the detection frame. The fixing rod 5 is perpendicular to the rotation axis of the detection frame. The detection frame as a whole is a rectangular frame structure. The first rod 2 is provided with a first positioning block 6 with a positioning portion 8, and the second rod 3 is provided with a second positioning block 7 with a positioning portion 8. The first positioning block 6 and the second positioning block 7 are of the same shape. The positioning portion 8 on the first positioning block 6 and the positioning portion 8 of the second positioning block 7 are arranged in the same plane. The first positioning block 6 and the second positioning block 7 respectively fix the two ends of the pipeline to be tested, thereby achieving reliable positioning and fixing of the pipeline to be tested. In this embodiment, the first positioning block 6 and the second positioning block 7 are provided as one and are respectively located in the middle position of the first rod 2 and the second rod 3. As a simple replacement for the above scheme, the first positioning block 6 and the second positioning block 7 are provided as multiple blocks with one-to-one correspondence, which can simultaneously complete the one-time measurement of multiple pipelines of multiple specifications.

[0026] For example, Figure 2 As can be seen, positioning portion 8 is shaped like a "V" surface. This enables automatic centering of the pipeline under test, ensuring that the pipeline under test is perpendicular to the rotation axis of the test frame. As a simple alternative to the above solution, positioning portion 8 can be shaped like an arc, a U, or the like.

[0027] As one of the embodiments of the present invention, a simple static friction coefficient detection device is disclosed, such as Figure 1 As shown, the restraining member is a cloth tape buckle 9 with adjustable length. The adjustable length of the cloth tape buckle 9 allows for the securement of pipes of varying sizes. After the pipe is positioned on the positioning portion 8, the cloth tape buckle 9 is passed around the pipe and tightened. The cloth tape presses the pipe against the positioning portion 8, securing it. This eliminates the need for frequent fixture changes, even for continuous measurements of pipes of varying sizes. Clamping is quick and easy.

[0028] As one of the embodiments of the present invention, a simple static friction coefficient detection device is disclosed. The detection frame is provided with a mounting rod 4 parallel to a first rod 2 and a second rod 3. The first rod 2 is rotatably connected to the main frame 1, and the mounting rod 4 is located at a position where the fixed rod 5 is close to the trisection point of the first rod 2. The transmission connecting rod 13 rotatably connects the sliding member 10 and the mounting rod 4. The linear drive mechanism includes a mating transmission screw 11 and a transmission nut. The transmission nut is fixedly connected to the sliding member 10. The two ends of the sliding member 10 are provided with a hollow mounting groove 12. One end of the transmission connecting rod 13 is inserted into the mounting groove 12 and then hinged. The two ends of the sliding member 10 are respectively matched with the transmission connecting rod 13. The two ends of the mounting rod 4 are respectively hinged to the two transmission connecting rods 13. The side of the transmission screw 11 is provided with a guide rod 14 parallel to the transmission screw 11. The sliding member 10 and the guide rod 14 are slidably connected via a linear bearing. When the transmission screw 11 rotates, the transmission nut and the sliding member 10 are driven to slide along the guide rod 14. Guide rods 14 are provided on opposite sides of the drive screw 11. Both ends of the drive screw 11 are rotatably connected to the main frame 1. While the drive screw 11 can be manually driven, the rotational amount can be easily controlled. As a simple alternative to the above solution, the drive screw 11 can also be slowly driven by a motor or the like.

[0029] In this embodiment, the main frame 1 is provided with a protrusion 15 protruding toward one side thereof, and one end of the detection frame is rotatably connected to the protrusion 15. Specifically, Figure 3 As shown, the first rod 2 is provided with an outwardly protruding plate hingedly connected to a protrusion 15, allowing the detection frame to be positioned perpendicularly relative to the main frame 1 at its ultimate tilting position. When the detection frame is tilted to be perpendicular to the main frame 1, the plate abuts against the protrusion 15 to form a stop. The protrusion 15 provides space for the detection frame to rotate, allowing the detection frame to avoid the position of the rotating end and also limiting the detection frame's ultimate tilting position.

Claims

1. A simple static friction coefficient detection device, characterized in that: It includes a main frame, a detection frame and a transmission assembly. One end of the detection frame is rotatably connected to the main frame. The transmission assembly includes a linear drive mechanism arranged along the surface where the main frame is located. The linear drive mechanism linearly drives a sliding member. A transmission connecting rod is connected between the sliding member and the detection frame to drive the detection frame to rotate when the sliding member is linearly driven by the linear drive mechanism. A positioning part is provided on the detection frame. The positioning part makes the pipeline to be tested perpendicular to the rotation axis of the detection frame. The detection frame is equipped with a constraint member that presses the pipeline to be tested against the positioning part.

2. A simple static friction coefficient detection device according to claim 1, characterized in that: The detection frame includes a first rod and a second rod in parallel. The first rod is provided with a first positioning block with a positioning portion, and the second rod is provided with a second positioning block with a positioning portion. The positioning portion on the first positioning block and the positioning portion on the second positioning block are arranged in a corresponding coplanar manner.

3. A simple static friction coefficient detection device according to claim 2, characterized in that: The positioning portion is in the shape of a "V" surface.

4. A simple static friction coefficient detection device according to claim 2, characterized in that: The restraining part is a cloth belt buckle with adjustable cloth belt length.

5. A simple static friction coefficient detection device according to any one of claims 1 to 4, characterized in that: The linear drive mechanism includes a matching transmission screw and a transmission nut, the transmission nut is fixedly connected to the sliding member, a guide rod parallel to the transmission screw is provided on the side of the transmission screw, the sliding member is slidably connected to the guide rod, and when the transmission screw rotates, the transmission nut and the sliding member are driven to slide along the guide rod.

6. A simple static friction coefficient detection device according to claim 5, characterized in that: Guide rods are respectively provided on opposite sides of the transmission screw.

7. A simple static friction coefficient detection device according to claim 1, characterized in that: The main frame is provided with a convex portion protruding toward one side thereof, and one end of the detection frame is rotatably connected to the convex portion.

8. A simple static friction coefficient detection device according to claim 2, characterized in that: The detection frame is provided with a mounting rod member parallel to the first rod member and the second rod member, and the transmission connecting rod is respectively rotatably connected to the sliding member and the mounting rod member.

9. A simple static friction coefficient detection device according to claim 1 or 7, characterized in that: The detection frame is perpendicular to the turning limit position of the main frame.

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