Scratch damage test tool

Abstract

The utility model belongs to the technical field of coating scratch test, and particularly relates to a scratch damage test tool, which comprises a mounting frame, the bearing seat is mounted on the mounting frame; the bearing seat comprises two bearing wheel sets which are parallel to each other; the pressing seat is vertically mounted on the mounting frame in a sliding manner and is positioned above the bearing seat; the lifting mechanism is mounted on the mounting frame; the pressing seat is fixedly mounted at the lower end of the lifting mechanism; the pressing base comprises a pressing frame, and two parallel pressing wheel sets are installed on the pressing frame. The bearing wheel set and the pressing wheel set are both parallel to a cylindrical tested piece located on the bearing seat. The auxiliary seat is transversely mounted on the pressing frame in a sliding manner, and a test needle is mounted at the lower end of the auxiliary seat; the moving mechanism is used for driving the auxiliary seat to move along the central axis direction of the cylindrical tested piece; and the rotating mechanism is used for driving the cylindrical tested piece to rotate around the central axis of the cylindrical tested piece. The objective of the utility model is to solve the problem that a conventional test tool cannot test a cylindrical tested piece.

Description

Technical Field

[0001] This utility model belongs to the field of coating scratch testing technology, specifically relating to a scratch damage testing fixture. Background Technology

[0002] Coating scratch testing devices can be used to measure the abrasion resistance and scratch resistance of product surface coatings, such as mechanical equipment housings, furniture coatings, electrical appliance coatings, circuit boards, and displays of mobile phones, computers, or televisions. After the coating is prepared, a scratch test is required to verify whether the coating meets the abrasion resistance requirements.

[0003] Chinese utility model patent (publication number: CN218726305U) discloses a coating scratch testing device. Through a data acquisition module and a computer, it can independently design the scratch test load, test position, and test length. The scratch test module enables stepless continuous loading within a large load range, autonomous adjustment of the contact between the test probe and the test piece, and synchronous measurement of multiple test probes to reduce the number of tests. Through a first guide rail, a second guide rail, and corresponding driving devices, the scratch test module reciprocates in the first and second directions. Through the adjustment component of the lower clamp, scratch measurement of test pieces of different thicknesses is achieved. Therefore, this coating scratch testing device possesses autonomous control capabilities, a high degree of integration, and high efficiency.

[0004] However, its fixtures are designed for planar test pieces. For non-planar test pieces, such as cylindrical bottles, it lacks the ability to hold them in place, which makes it impossible to test cylindrical test pieces. Utility Model Content

[0005] The purpose of this invention is to provide a scratch damage testing fixture to solve the problem that existing testing fixtures cannot test cylindrical test pieces.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A scratch damage test fixture, comprising:

[0008] Mounting rack;

[0009] A support base for supporting a cylindrical test piece, the support base being mounted on a mounting frame;

[0010] The bearing seat includes two sets of parallel bearing wheels;

[0011] A pressing seat for pressing a cylindrical test piece, the pressing seat being vertically slidably mounted on a mounting frame and located above a support seat;

[0012] A lifting mechanism for driving the pressing seat to move up and down; the lifting mechanism is mounted on a mounting frame, and the pressing seat is fixedly mounted on the lower end of the lifting mechanism.

[0013] The pressing base includes a pressing frame, on which two sets of parallel pressing wheels are mounted;

[0014] Both the bearing wheel assembly and the pressing wheel assembly are parallel to the cylindrical test piece located on the bearing seat;

[0015] A secondary seat is laterally slidably mounted on a pressing frame, and a test probe is installed at the lower end of the secondary seat;

[0016] A moving mechanism for driving the sub-seat to move along the central axis of the cylindrical test piece;

[0017] A rotating mechanism used to drive a cylindrical workpiece to rotate around its central axis.

[0018] Further specifying, each of the said load-bearing wheel set and pressing wheel set includes two rollers.

[0019] This structural design, which uses rollers to form a load-bearing wheel group and a pressing wheel group, is simple in structure, easy to install, and highly practical.

[0020] Further specified, the outer wall of the roller is provided with a threaded rubber strip, and the threaded rubber strips on the same set of bearing rollers or pressing rollers have opposite rotation directions.

[0021] This structural design increases the friction between the roller and the cylindrical test piece by using threaded rubber strips, preventing slippage between them during the test. At the same time, setting the threaded rubber strips on the same set of bearing wheels or pressing wheels to rotate in opposite directions can prevent axial movement of the cylindrical test piece during the roller's rolling process, making it highly practical.

[0022] Furthermore, both the bearing wheel assembly and the pressing wheel assembly are strip-shaped rollers.

[0023] This structural design, which uses strip rollers to form a load-bearing wheel group and a pressing wheel group, is simple in structure, easy to install, and highly practical.

[0024] Furthermore, both ends of the outer wall of the strip roller are provided with threaded rubber strips, and the spiral directions of the threaded rubber strips at both ends of the strip roller are opposite.

[0025] This structural design increases the friction between the strip roller and the cylindrical test piece by using threaded rubber strips, preventing slippage between them during the test. At the same time, setting the threaded rubber strips at both ends of the strip roller to rotate in opposite directions can prevent axial movement of the cylindrical test piece during the rolling of the strip roller, making it highly practical.

[0026] Further specifying, the lifting mechanism includes a lifting motor fixedly mounted on the mounting frame, and a first lead screw is fixedly mounted on the power output end of the lifting motor, the first lead screw being screwed to the pressing frame;

[0027] A first guide rod is vertically mounted on the mounting bracket, and the pressing bracket is slidably mounted on the first guide rod.

[0028] This structural design uses a lifting motor to drive the first lead screw to rotate, which in turn moves the pressing frame on the first guide rod, thereby changing the height position of the pressing frame. It has high control precision and strong practicality.

[0029] Further specifying, the moving mechanism includes a moving motor fixedly mounted on the pressing frame, and a second lead screw is fixedly mounted on the power output end of the moving motor, the second lead screw being screwed to the auxiliary seat;

[0030] A second guide rod is horizontally mounted on the pressing frame, and the sub-seat is slidably mounted on the second guide rod.

[0031] This structural design uses a moving motor to drive the second lead screw to rotate, which in turn moves the sub-seat on the second guide rod, thereby changing the lateral position of the test probe on the sub-seat. It has high control precision and strong practicality.

[0032] Further specifying, the rotating mechanism includes a rotating motor fixedly mounted on the pressing frame, a worm gear fixedly mounted on the power output end of the rotating motor, a worm wheel rotatably mounted on the pressing frame and meshing with the worm gear, a first gear coaxially fixedly mounted on the worm wheel, and a second gear rotatably mounted on the pressing frame and meshing with the first gear, the second gear being fixedly connected to one of the pressing wheel groups.

[0033] This structural design utilizes a rotating motor to drive a worm gear, which in turn meshes with a worm wheel to rotate a first gear. The meshing of the first and second gears then drives one of the pressing wheel sets to rotate, which in turn causes the cylindrical workpiece to rotate around its central axis. This design is simple in structure and highly stable.

[0034] Furthermore, an adjustment motor and a third guide rod are fixedly installed on the lower end face of the sub-seat;

[0035] A third lead screw is fixedly installed at the lower end of the regulating motor, and a threaded sleeve is screwed onto the third lead screw;

[0036] The third guide rod is vertically slidably mounted with a connecting seat, and the threaded sleeve is fixedly mounted on the connecting seat;

[0037] The test probe is mounted on the lower end face of the connector.

[0038] This structural design allows for adjustment of the vertical position of the test probe relative to the sub-base by adjusting the interaction between the motor and the test probe, thus adapting to cylindrical test pieces of different diameters, expanding the range of applications, and making it highly practical.

[0039] The utility model adopting the above technical solution has the following advantages:

[0040] The cylindrical test piece is supported by the bearing wheels on the bearing seat. The lifting mechanism drives the pressing seat to move downward. The pressing wheels and bearing wheels are used to fix the cylindrical test piece. At this time, the moving mechanism drives the sub-seat with the test probe to move along the central axis of the cylindrical test piece. The test probe can then draw an axial straight line on the side of the cylindrical test piece, completing the first test on the cylindrical test piece.

[0041] Then, the rotating mechanism drives the cylindrical test piece to rotate by a certain angle, and the above steps are repeated to draw a second axial straight line on the cylindrical test piece.

[0042] Meanwhile, when the moving mechanism is not in operation, the rotation of the cylindrical test piece by the rotating mechanism can create a circumferential scratch on the cylindrical test piece. Then, by changing the position of the test probe by the moving mechanism and cooperating with the rotation of the cylindrical test piece by the rotating mechanism, a second circumferential scratch can be created. Attached Figure Description

[0043] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0044] Figure 1 This is a schematic diagram of an embodiment of a scratch damage testing fixture of this utility model;

[0045] Figure 2 This is a schematic diagram of the pressing seat portion in an embodiment of a scratch damage testing fixture of this utility model;

[0046] The symbols for the main components are explained below:

[0047] Bearing seat 1, cylindrical test piece 10,

[0048] Press base 2, press frame 20

[0049] Moving motor 21, second lead screw 211, second guide rod 212

[0050] Rotating motor 22, worm gear 221, worm wheel 222, first gear 223, second gear 224

[0051] 3 rollers, 30 threaded rubber strips

[0052] Passenger seat 4, test probe 40

[0053] Adjustment motor 41, third guide rod 410, threaded sleeve 42, connecting seat 43. Detailed Implementation

[0054] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0055] like Figures 1-2 As shown, the scratch damage testing fixture of this utility model includes:

[0056] Mounting rack;

[0057] A support seat 1 is used to support the cylindrical test piece 10. The support seat 1 is mounted on a mounting frame.

[0058] The bearing seat 1 includes two sets of parallel bearing wheels;

[0059] The pressing seat 2 is used to press the cylindrical test piece 10. The pressing seat 2 is vertically slidably mounted on the mounting frame and located above the bearing seat 1.

[0060] A lifting mechanism is used to drive the pressing seat 2 to move up and down. The lifting mechanism is installed on the mounting frame, and the pressing seat 2 is fixedly installed at the lower end of the lifting mechanism.

[0061] The pressing base 2 includes a pressing frame 20, on which two sets of parallel pressing wheels are mounted;

[0062] Both the bearing wheel assembly and the pressing wheel assembly are parallel to the cylindrical test piece 10 located on the bearing seat 1;

[0063] Subsidiary seat 4 is horizontally slidably mounted on the pressing frame 20, and a test probe 40 is installed at the lower end of the subsidiary seat 4;

[0064] A moving mechanism for driving the auxiliary seat 4 to move along the central axis of the cylindrical measured part 10;

[0065] A rotating mechanism for driving the cylindrical test piece 10 to rotate around the central axis of the cylindrical test piece 10.

[0066] Each load-bearing wheel assembly and pressing wheel assembly includes two rollers 3.

[0067] The rollers 3 form a load-bearing wheel group and a pressing wheel group, which has a simple structure, is easy to install, and is highly practical.

[0068] The outer wall of the roller 3 is provided with a threaded rubber strip 30, and the threaded rubber strips 30 on the same set of bearing rollers or pressing rollers have opposite rotation directions.

[0069] By increasing the friction between the roller 3 and the cylindrical test piece 10 by using the threaded rubber strip 30, the slippage between the roller 3 and the cylindrical test piece 10 during the test is avoided. At the same time, setting the threaded rubber strip 30 on the same set of bearing wheels or pressing wheels to rotate in opposite directions can prevent the cylindrical test piece 10 from moving axially during the rolling of the roller 3, which is highly practical.

[0070] Both the load-bearing roller set and the pressing roller set are strip rollers.

[0071] The structure consists of a bearing wheel assembly and a pressing wheel assembly made of strip rollers. It is simple in structure, easy to install, and highly practical.

[0072] Both ends of the outer wall of the strip roller are provided with threaded rubber strips 30, and the spiral directions of the threaded rubber strips 30 at both ends of the strip roller are opposite.

[0073] By increasing the friction between the strip roller and the cylindrical test piece 10 through the threaded rubber strip 30, the slippage between the strip roller and the cylindrical test piece 10 during the test is avoided. At the same time, setting the threaded rubber strips 30 at both ends of the strip roller to rotate in opposite directions can prevent the cylindrical test piece 10 from moving axially during the rolling of the strip roller, which is highly practical.

[0074] The lifting mechanism includes a lifting motor fixedly mounted on the mounting frame. A first lead screw is fixedly mounted on the power output end of the lifting motor, and the first lead screw is screwed to the pressing frame 20.

[0075] The first guide rod is vertically mounted on the mounting bracket, and the pressing bracket 20 is slidably mounted on the first guide rod.

[0076] In practice, depending on the actual situation, a form such as a telescopic hydraulic rod can be selected to achieve vertical pushing of the pressing frame 20. In this embodiment, the first lead screw is driven to rotate by a lifting motor, which in turn drives the pressing frame 20 to move on the first guide rod, thereby changing the height position of the pressing frame 20. It has high control precision and strong practicality.

[0077] The moving mechanism includes a moving motor 21 fixedly mounted on the pressing frame 20. A second lead screw 211 is fixedly mounted on the power output end of the moving motor 21, and the second lead screw 211 is screwed to the sub-seat 4.

[0078] A second guide rod 212 is horizontally mounted on the pressing frame 20, and the sub-seat 4 is slidably mounted on the second guide rod 212.

[0079] In practice, depending on the actual situation, a form such as a telescopic hydraulic rod can be selected to achieve the lateral pushing of the auxiliary seat 4. In this embodiment, the moving motor 21 drives the second lead screw 211 to rotate, thereby driving the auxiliary seat 4 to move on the second guide rod 212, so as to change the lateral position of the test needle 40 on the auxiliary seat 4. The control accuracy is high and the practicality is strong.

[0080] The rotating mechanism includes a rotating motor 22 fixedly mounted on the pressing frame 20. A worm gear 221 is fixedly mounted on the power output end of the rotating motor 22. A worm wheel 222 meshing with the worm gear 221 is rotatably mounted on the pressing frame 20. A first gear 223 is coaxially fixedly mounted on the worm wheel 222. A second gear 224 meshing with the first gear 223 is rotatably mounted on the pressing frame 20. The second gear 224 is fixedly connected to one of the pressing wheel groups.

[0081] In practice, depending on the actual situation, a rotating component that contacts the cylindrical test piece 10 can be added to the mounting frame to achieve rotation of the cylindrical test piece 10. In this embodiment, the rotating motor 22 drives the worm 221 to rotate. Through the meshing of the worm 221 and the worm wheel 222, the first gear 223 is driven to rotate. Then, through the meshing of the first gear 223 and the second gear 224, one of the pressing wheel groups is driven to rotate, thereby driving the cylindrical test piece 10 to rotate around the central axis of the cylindrical test piece 10. The structure is simple and has strong stability.

[0082] An adjusting motor 41 and a third guide rod 410 are fixedly installed on the lower end face of the auxiliary seat 4;

[0083] A third lead screw is fixedly installed at the lower end of the adjusting motor 41, and a threaded sleeve 42 is screwed onto the third lead screw;

[0084] The third guide rod 410 is vertically slidably mounted with a connecting seat 43, and the threaded sleeve 42 is fixedly mounted on the connecting seat 43;

[0085] The test probe 40 is mounted on the lower end face of the connector 43.

[0086] In practice, depending on the actual situation, the test needle 40 can also be fixedly installed on the lower end face of the sub-base 4, and the test can be performed only on cylindrical test pieces 10 with a fixed diameter. In this embodiment, by adjusting the cooperation between the motor 41 and the test needle 40, the vertical position of the test needle 40 relative to the sub-base 4 can be adjusted to adapt to cylindrical test pieces 10 with different diameters, thus expanding the range of applications and making it more practical.

[0087] In this embodiment, during the test, the lifting mechanism is used to drive the pressing seat 2 to move upward, making room between the bearing seat 1 and the pressing seat 2. Then, the cylindrical test piece 10 is placed on the bearing seat 1, and the cylindrical test piece 10 is supported by the two sets of bearing wheels on the bearing seat 1. After that, the lifting mechanism is used to drive the pressing seat 2 to move downward, so that the pressing wheel set of the pressing seat 2 presses against the cylindrical test piece 10.

[0088] Based on the diameter of the cylindrical test piece 10, the height position of the test needle 40 is adjusted by the adjusting motor 41 so that the test needle 40 presses against the cylindrical test piece 10 with a certain pressure.

[0089] At this time, if it is necessary to use the test needle 40 to draw an axial straight line on the side of the cylindrical test piece 10, the moving mechanism can be used to drive the sub-seat 4 on which the test needle 40 is installed to move along the central axis of the cylindrical test piece 10 without the rotating mechanism moving.

[0090] After one test, the cylindrical test piece 10 is rotated by a certain angle by the rotating mechanism. The above steps are repeated to draw a second axial straight line on the cylindrical test piece 10.

[0091] If it is necessary to use the test probe 40 to make circumferential scratches on the side of the cylindrical test piece 10, the cylindrical test piece 10 can be rotated by the rotation mechanism without the moving mechanism operating.

[0092] After one circumferential test, the position of the test needle 40 is changed by using a moving mechanism, and the above steps are repeated to draw a second circumferential scratch.

[0093] The above provides a detailed description of the scratch damage testing fixture provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A scratch damage testing fixture, characterized in that: include: Mounting rack; A support (1) for supporting a cylindrical test piece (10), the support (1) being mounted on a mounting frame; The bearing seat (1) includes two sets of parallel bearing wheels; A pressing seat (2) for pressing a cylindrical test piece (10), the pressing seat (2) is vertically slidably mounted on the mounting frame and located above the support seat (1); A lifting mechanism for driving the pressing seat (2) to move up and down, the lifting mechanism is mounted on the mounting frame, and the pressing seat (2) is fixedly mounted on the lower end of the lifting mechanism; The pressing base (2) includes a pressing frame (20), on which two sets of parallel pressing wheels are mounted; The bearing wheel assembly and the pressing wheel assembly are both parallel to the cylindrical test piece (10) located on the bearing seat (1); Subsidiary seat (4), which is laterally slidably mounted on the pressing frame (20), and a test needle (40) is installed at the lower end of the subsidiary seat (4). A moving mechanism for driving the sub-seat (4) to move along the central axis of the cylindrical test piece (10); A rotating mechanism for driving a cylindrical test piece (10) to rotate around the central axis of the cylindrical test piece (10).

2. The scratch damage testing fixture according to claim 1, characterized in that: Each of the aforementioned load-bearing wheel set and pressing wheel set includes two rollers (3).

3. The scratch damage testing fixture according to claim 2, characterized in that: The outer wall of the roller (3) is provided with a threaded rubber strip (30), and the threaded rubber strip (30) on the same set of bearing rollers or pressing rollers has opposite rotation directions.

4. The scratch damage testing fixture according to claim 1, characterized in that: Both the load-bearing roller assembly and the pressing roller assembly are strip-shaped rollers.

5. The scratch damage testing fixture according to claim 4, characterized in that: Both ends of the outer wall of the strip roller are provided with threaded rubber strips (30), and the spiral directions of the threaded rubber strips (30) at both ends of the strip roller are opposite.

6. The scratch damage testing fixture according to claim 1, characterized in that: The lifting mechanism includes a lifting motor fixedly installed on the mounting frame, and a first lead screw is fixedly installed at the power output end of the lifting motor. The first lead screw is screwed to the pressing frame (20). A first guide rod is vertically mounted on the mounting bracket, and the pressing bracket (20) is slidably mounted on the first guide rod.

7. The scratch damage testing fixture according to claim 1, characterized in that: The moving mechanism includes a moving motor (21) fixedly installed on the pressing frame (20), and a second lead screw (211) is fixedly installed at the power output end of the moving motor (21), and the second lead screw (211) is screwed to the sub-seat (4); A second guide rod (212) is horizontally mounted on the pressing frame (20), and the sub-seat (4) is slidably mounted on the second guide rod (212).

8. The scratch damage testing fixture according to claim 1, characterized in that: The rotating mechanism includes a rotating motor (22) fixedly mounted on the pressing frame (20). A worm gear (221) is fixedly mounted on the power output end of the rotating motor (22). A worm wheel (222) meshing with the worm gear (221) is rotatably mounted on the pressing frame (20). A first gear (223) is coaxially fixedly mounted on the worm wheel (222). A second gear (224) meshing with the first gear (223) is rotatably mounted on the pressing frame (20). The second gear (224) is fixedly connected to one of the pressing wheel groups.

9. The scratch damage testing fixture according to claim 1, characterized in that: An adjusting motor (41) and a third guide rod (410) are fixedly installed on the lower end face of the sub-seat (4). The lower end of the regulating motor (41) is fixedly installed with a third lead screw, and a threaded sleeve (42) is screwed onto the third lead screw. The third guide rod (410) is vertically slidably mounted with a connecting seat (43), and the threaded sleeve (42) is fixedly mounted on the connecting seat (43); The test probe (40) is mounted on the lower end face of the connector (43).

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