A non-planar scribe damage test apparatus

Abstract

The present application belongs to the technical field of coating scratch test, and particularly relates to a non-planar scratch damage test device, which comprises a mounting frame, a bearing groove, a bearing frame, a lifting frame, a discharging block and an intercepting piece installed on the mounting frame, the bearing groove is obliquely arranged, the bearing frame is located at one end of the bearing groove, the lifting frame is vertically slidably installed on the mounting frame and located above the bearing frame, a lifting mechanism is installed between the mounting frame and the lifting frame, a rotating mechanism is installed on the lifting frame, a test needle for abutting the cylindrical measured piece with a certain pressure is installed on the lifting frame, the discharging block is movably installed on the mounting frame and used for pushing the cylindrical measured piece after the test is completed to fall from the bearing frame, and the intercepting piece is movably installed on the bearing frame and used for avoiding the new cylindrical measured piece from sliding off the bearing frame due to the motion inertia after the new cylindrical measured piece slides onto the bearing frame. The purpose is to solve the problem of low test efficiency caused by the structural defects of the existing test device.

Description

Technical Field

[0001] This invention belongs to the field of coating scratch testing technology, specifically relating to a non-planar scratch damage testing device. Background Technology

[0002] Scratch testing involves repeatedly scratching the surface of the product under test with a set pressure and frequency, and analyzing the surface after each scratch to detect the scratch resistance of the product's surface. This ensures that products meeting the requirements can maintain a perfect appearance even if they are accidentally squeezed or hit during transportation or carrying.

[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, the lower clamp uses an adjustment assembly consisting of adjusting bolts and clamping shims to fix the test piece in place. This is done entirely manually, resulting in low testing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a non-planar scratch damage testing device to solve the problem of low testing efficiency caused by structural defects in existing testing devices.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A non-planar scratch damage testing device includes: a mounting frame;

[0008] The mounting frame is equipped with a bearing groove, a bearing frame, a lifting frame, a unloading block, and an intercepting component;

[0009] The bearing groove is inclined to guide the cylindrical test piece to slide down.

[0010] The support frame is located at one end of the support groove and is used to receive the cylindrical test piece that slides down from the inclined support groove;

[0011] The lifting frame is vertically slidably mounted on the mounting frame and located above the support frame, and is used to press the cylindrical test piece located on the support frame;

[0012] A lifting mechanism is installed between the mounting frame and the lifting frame, and the lifting mechanism is used to drive the lifting frame to move up and down.

[0013] The lifting frame is equipped with a rotating mechanism, which is used to drive the cylindrical test piece pressed by the lifting frame onto the support frame to rotate along the central axis of the cylindrical test piece.

[0014] The lifting frame is equipped with a test probe for pressing against the cylindrical test piece with a certain pressure.

[0015] The unloading block is movably mounted on the mounting frame and is used to push the cylindrical test piece off the support frame after the test is completed.

[0016] The interceptor is movably mounted on the support frame to prevent a new cylindrical test piece from slipping off the support frame due to inertia after it falls onto the support frame.

[0017] Furthermore, the lifting frame, unloading block, and interceptor are connected by a transmission mechanism.

[0018] This structural design, through the lifting mechanism that moves the lifting frame up and down, drives the unloading block and intercepting components to move in the corresponding stages, reducing the need for power components, saving manufacturing costs, and making it highly practical.

[0019] Further specified, the unloading block is vertically slidably mounted on the mounting frame and located below the support frame;

[0020] The upper surface of the unloading block is inclined from top to bottom toward the side away from the bearing trough;

[0021] Both sides of the unloading block are provided with connecting ears, and blind holes are provided on the connecting ears;

[0022] The lifting frame includes two connecting arms, which are located on both sides of the unloading block.

[0023] A connecting rod is slidably mounted laterally on the lower part of the connecting arm, and a compression spring for driving the connecting rod to move inward is installed between the connecting arm and the connecting rod.

[0024] The connecting rod is connected to a push block on the outside of the connecting arm;

[0025] The mounting bracket has a wedge-shaped block installed above the push block;

[0026] When the pushing block moves upward to the wedge block under the action of the lifting mechanism, the wedge block drives the connecting rod to move outward against the prestress of the compression spring, so that the connecting rod disengages from the blind hole.

[0027] This structural design, through the cooperation of the unloading block, connecting ear, blind hole, connecting rod, push block and wedge block, realizes the transmission connection between the lifting frame and the unloading block. The structure is simple, easy to control and highly practical.

[0028] Furthermore, the blind hole is a vertically arranged strip shape.

[0029] This structural design, by setting the blind hole as a strip, allows the lifting frame to have a margin to continue moving downward relative to the unloading block when the connecting rod is engaged with the blind hole. Therefore, it is still applicable to cylindrical test pieces with smaller diameters and has strong practicality.

[0030] Furthermore, the unloading block has a protruding ridge on the side near the bearing groove.

[0031] This structural design, through the setting of protruding ridges, can temporarily block subsequent cylindrical test pieces on the bearing groove when the unloading block rises and pushes the cylindrical test piece located on the bearing frame to detach, thus preventing the subsequent cylindrical test pieces from slipping down together, which is highly practical.

[0032] Further specified, the interceptor is rotatably mounted on the support frame, and the end of the interceptor near the support groove is located below the unloading block;

[0033] When the unloading block moves upward under the drive of the lifting frame, the free end of the interceptor moves downward until it makes way for the sliding path of the cylindrical test piece located on the support frame.

[0034] After the unloading block disengages from the lifting frame and resets, the free end of the interceptor tilts upward to block the sliding path of the cylindrical test piece located on the support frame.

[0035] This structural design, through the cooperation between the interceptor and the unloading block, enables the operation of the interceptor. It is simple in structure, easy to control, and highly practical.

[0036] Furthermore, the hinge point between the interceptor and the support frame is located between the center of gravity of the interceptor and the support groove.

[0037] This structural design, by limiting the center of gravity of the interceptor, allows the free end of the interceptor to automatically move downward under the action of gravity during the rising of the unloading block, thus making way for the slide path. The structure is simple and highly practical.

[0038] Further specified, the support frame includes two sets of parallel support wheels;

[0039] The lifting frame includes two sets of parallel pressing wheels;

[0040] Both the bearing wheel assembly and the pressing wheel assembly are parallel to the cylindrical test piece located on the bearing frame;

[0041] Both the load-bearing wheel assembly and the pressing wheel assembly include rollers;

[0042] The rotating mechanism is a rotating motor, and the power output shaft of the rotating motor is connected to one of the sets of pressing wheels.

[0043] This structural design uses a rotating motor as a transmission mechanism to drive a set of pressing wheels to rotate, which in turn drives the cylindrical test piece located between the support frame and the lifting frame to rotate. Together with the test probe, it completes the test on the cylindrical test piece. The structure is simple, easy to use, and highly practical.

[0044] Furthermore, the lifting frame is vertically equipped with a telescopic mechanism, and the test probe is installed at the lower end of the telescopic mechanism.

[0045] This structural design, through the telescopic mechanism, adjusts the distance between the test probe and the lifting frame, thereby enabling the testing of cylindrical test pieces of different diameters, making it more adaptable and practical.

[0046] Further specified, the lifting frame is provided with an isolation wheel on the side near the bearing groove. The isolation wheel is used to push the subsequent cylindrical test piece located on the bearing groove away from the cylindrical test piece located on the bearing frame when the lifting frame presses the cylindrical test piece located on the bearing frame.

[0047] This structural design, through the setting of isolation wheels, separates the rotating cylindrical test piece from the cylindrical test piece located in the bearing groove, avoiding relative movement that could affect the test results, and is highly practical.

[0048] The invention employing the above technical solution has the following advantages:

[0049] 1. Through the cooperation of the bearing groove, bearing frame, lifting frame, unloading block and interceptor, the cylindrical test piece can enter between the bearing frame and the lifting frame in sequence along the bearing groove. With the cooperation of the lifting mechanism and the rotating mechanism, an automated test of the cylindrical test piece is formed, which improves the test efficiency.

[0050] 2. The lifting mechanism moves the lifting frame up and down, driving the unloading block and intercepting parts to move in the corresponding stages, reducing the layout of power components, saving manufacturing costs, and making it highly practical.

[0051] 3. The transmission connection between the lifting frame and the unloading block is realized through the cooperation of the unloading block, connecting ear, blind hole, connecting rod, pushing block and wedge block. The structure is simple, the control is convenient and the practicality is strong.

[0052] 4. The interceptor and the unloading block work together to operate the interceptor. The structure is simple, easy to control, and highly practical. Attached Figure Description

[0053] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0054] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of a non-planar scratch damage testing device according to the present invention;

[0055] Figure 2 This is a schematic diagram of the structure of the support frame, unloading block and interceptor in an embodiment of a non-planar scratch damage testing device of the present invention;

[0056] Figure 3 This is a schematic diagram of the unloading block portion in an embodiment of a non-planar scratch damage testing device of the present invention;

[0057] Figure 4 This is a schematic diagram of the lifting frame portion in an embodiment of a non-planar scratch damage testing device of the present invention;

[0058] Figure 5 This is a schematic diagram of the structure of an embodiment of a non-planar scratch damage testing device of the present invention. Figure 1 ;

[0059] Figure 6 This is a schematic diagram of the structure of an embodiment of a non-planar scratch damage testing device of the present invention. Figure 2 ;

[0060] Figure 7 This is a schematic diagram of the structure of an embodiment of a non-planar scratch damage testing device of the present invention. Figure 3 ;

[0061] Figure 8 This is a schematic diagram of the structure of an embodiment of a non-planar scratch damage testing device of the present invention. Figure 4 ;

[0062] Figure 9 This is a schematic diagram of the structure of an embodiment of a non-planar scratch damage testing device of the present invention. Figure 5 ;

[0063] The symbols for the main components are explained below:

[0064] Bearing groove 1, cylindrical test piece 10,

[0065] Support frame 2, rollers 21

[0066] Lifting frame 3, test probe 30, connecting arm 31, connecting rod 32, push block 33, wedge block 34, isolation wheel 35.

[0067] Unloading block 4, protruding ridge 40, connecting lug 41, blind hole 42

[0068] Intercept 5. Detailed Implementation

[0069] 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. In addition, 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.

[0070] like Figures 1-9 As shown, a non-planar scratch damage testing device of the present invention includes: a mounting frame;

[0071] The mounting frame is equipped with a bearing groove 1, a bearing frame 2, a lifting frame 3, a discharge block 4, and an interceptor 5;

[0072] The bearing groove 1 is inclined to guide the cylindrical test piece 10 to slide down.

[0073] The support frame 2 is located at one end of the support groove 1 and is used to receive the cylindrical test piece 10 that slides down from the inclined support groove 1.

[0074] The lifting frame 3 is vertically slidably installed on the mounting frame and located above the support frame 2, and is used to press the cylindrical test piece 10 located on the support frame 2;

[0075] A lifting mechanism is installed between the mounting frame and the lifting frame 3. The lifting mechanism is used to drive the lifting frame 3 to move up and down.

[0076] The lifting frame 3 is equipped with a rotating mechanism, which is used to drive the cylindrical test piece 10, which is pressed by the lifting frame 3 onto the bearing frame 2, to rotate along the central axis of the cylindrical test piece 10.

[0077] The lifting frame 3 is equipped with a test needle 30 for pressing against the cylindrical test piece 10 with a certain pressure;

[0078] The unloading block 4 is movably mounted on the mounting frame and is used to push the cylindrical test piece 10 off the support frame 2 after the test is completed;

[0079] The interceptor 5 is movably mounted on the support frame 2 to prevent the new cylindrical test piece 10 from slipping off the support frame 2 and detaching from the support frame 2 due to inertia.

[0080] The lifting frame 3, the unloading block 4, and the interceptor 5 are connected by a transmission mechanism.

[0081] In practice, depending on the actual situation, power components such as telescopic cylinders can be installed for the unloading block 4 and the interceptor 5 respectively. The telescopic cylinders can be used as the power source for the unloading block 4 and the interceptor 5 to complete their actions. In this embodiment, the lifting mechanism moves the lifting frame 3 up and down, which drives the unloading block 4 and the interceptor 5 to move in the corresponding stages, reducing the number of power components, saving manufacturing costs, and making it more practical.

[0082] The unloading block 4 is vertically slidably installed on the mounting frame and located below the bearing frame 2;

[0083] The upper surface of the unloading block 4 is inclined from top to bottom toward the side away from the bearing trough 1;

[0084] Both sides of the unloading block 4 are provided with connecting ears 41, and blind holes 42 are provided on the connecting ears 41.

[0085] The lifting frame 3 includes two connecting arms 31, which are located on both sides of the unloading block 4.

[0086] A connecting rod 32 is slidably mounted laterally on the lower part of the connecting arm 31, and a compression spring for driving the connecting rod 32 to move inward is installed between the connecting arm 31 and the connecting rod 32;

[0087] A push block 33 is connected to the outside of the connecting arm 31 on the connecting rod 32;

[0088] A wedge block 34 is mounted on the mounting bracket above the push block 33;

[0089] When the push block 33 moves upward to the wedge block 34 under the action of the lifting mechanism, the wedge block 34 drives the connecting rod 32 to move outward against the prestress of the compression spring through the push block 33, so that the connecting rod 32 disengages from the blind hole 42.

[0090] In practice, depending on the actual situation, an electromagnet can be used to attract the unloading block 4, and the power can be cut off at a specific position to achieve the automatic falling of the unloading block 4. In this embodiment, the transmission connection between the lifting frame 3 and the unloading block 4 is achieved through the cooperation of the unloading block 4, the connecting ear 41, the blind hole 42, the connecting rod 32, the pushing block 33 and the wedge block 34. The structure is simple, the control is convenient, and the practicality is strong.

[0091] Blind hole 42 is a vertically arranged strip.

[0092] In fact, depending on the actual situation, the blind hole 42 can also be set to a circle. In this embodiment, by setting the blind hole 42 to a strip shape, the lifting frame 3 can have a margin to continue moving downward relative to the unloading block 4 when the connecting rod 32 is engaged with the blind hole 42. Therefore, it is still applicable to the cylindrical test piece 10 with a smaller diameter and has strong practicality.

[0093] The unloading block 4 has a protruding ridge 40 on the side near the bearing groove 1.

[0094] By setting the protruding rib 40, when the unloading block 4 rises and pushes the cylindrical test piece 10 located on the support frame 2 to detach, the protruding rib 40 can be used to temporarily block the subsequent cylindrical test piece 10 on the support groove 1, so as to prevent the subsequent cylindrical test piece 10 from sliding down together, which is highly practical.

[0095] The interceptor 5 is rotatably mounted on the support frame 2, with the end of the interceptor 5 near the support groove 1 located below the unloading block 4;

[0096] When the unloading block 4 moves upward under the drive of the lifting frame 3, the free end of the interceptor 5 moves downward until it gives way to the sliding path of the cylindrical test piece 10 located on the support frame 2.

[0097] When the unloading block 4 is disengaged from the lifting frame 3 and resets, the free end of the interceptor 5 tilts upward to block the sliding path of the cylindrical test piece 10 located on the support frame 2.

[0098] In practice, depending on the actual situation, it is also possible to connect the interceptor 5 with the lifting frame 3 through a transmission connection to achieve synchronous action of the interceptor 5. In this embodiment, the operation of the interceptor 5 is achieved through the mutual cooperation between the interceptor 5 and the unloading block 4. The structure is simple, the control is convenient, and the practicality is strong.

[0099] The hinge point between the interceptor 5 and the support frame 2 is located between the center of gravity of the interceptor 5 and the support groove 1.

[0100] By limiting the center of gravity of the interceptor 5, the free end of the interceptor 5 automatically moves down under the action of gravity during the rising of the unloading block 4, thus making way for the slide path. The structure is simple and highly practical.

[0101] In practice, depending on the actual situation, a torsion spring can be installed between the interceptor 5 and the support frame 2. The torsion spring drives the interceptor 5 to automatically make way for the sliding path during the rising of the unloading block 4. This embodiment

[0102] The support frame 2 includes two sets of parallel support wheels;

[0103] The lifting frame 3 includes two sets of parallel pressing wheels;

[0104] Both the load-bearing wheel assembly and the pressing wheel assembly are parallel to the cylindrical test piece 10 located on the load-bearing frame 2;

[0105] Both the load-bearing wheel assembly and the pressing wheel assembly include rollers 21;

[0106] The rotating mechanism is a rotating motor, and the power output shaft of the rotating motor is connected to one of the sets of pressing wheels.

[0107] In practice, depending on the actual situation, strip rollers can also be selected to press, receive, and rotate the cylindrical test piece 10. In this embodiment, a rotating motor is used as a transmission mechanism to drive one set of pressing wheels to rotate, which in turn drives the cylindrical test piece 10 located between the support frame 2 and the lifting frame 3 to rotate. The test is completed in conjunction with the test needle 30. The structure is simple, easy to use, and highly practical.

[0108] A telescopic mechanism is vertically installed on the lifting frame 3, and the test needle 30 is installed at the lower end of the telescopic mechanism.

[0109] In practice, the test needle 30 can also be directly installed on the lifting frame 3 according to the actual situation. In this embodiment, the distance between the test needle 30 and the lifting frame 3 is adjusted by the telescopic mechanism, so as to detect cylindrical test pieces 10 of different diameters, which has a wider range of applications and stronger practicality.

[0110] The lifting frame 3 is provided with an isolation wheel 35 on the side near the bearing groove 1. The isolation wheel 35 is used to push the subsequent cylindrical test piece 10 located on the bearing groove 1 away from the cylindrical test piece 10 located on the bearing frame 2 when the lifting frame 3 presses the cylindrical test piece 10 located on the bearing frame 2.

[0111] By setting the isolation wheel 35, the rotating cylindrical test piece 10 and the cylindrical test piece 10 located in the bearing groove 1 are separated, avoiding relative movement that could affect the test results, thus making it highly practical.

[0112] The lifting mechanism and / or telescopic mechanism are telescopic hydraulic cylinders.

[0113] In practice, a servo motor can also be selected to control the corresponding components, depending on the actual situation. In this embodiment, a telescopic hydraulic cylinder is used as the lifting mechanism and / or telescopic mechanism to complete the telescopic control of each component. The structure is simple, the control is convenient, and the practicality is strong.

[0114] In this embodiment, during testing, a cylindrical test piece 10 is positioned on the rollers 21 of the support frame 2 and is pressed by the rollers 21 of the lifting frame 3, thus restricting the cylindrical test piece 10. Then, a telescopic mechanism drives the test needle 30 to descend a certain distance and press against the cylindrical test piece 10 with a certain pressure. Afterwards, a rotating motor drives one set of pressing wheels on the lifting frame 3 to rotate, causing the cylindrical test piece 10 located between the support frame 2 and the lifting frame 3 to rotate, thereby completing the scratch damage test on the cylindrical test piece 10. During this process, subsequent cylindrical test pieces 10 are located in the support groove 1 and are pressed against by the isolation wheel 35, achieving isolation from the rotating cylindrical test piece 10. Figure 1 and Figure 5 As shown;

[0115] After a cylindrical test piece 10 is tested, the lifting mechanism drives the lifting frame 3 to move upward. The connecting rod 32 on the connecting arm 31 is engaged in the blind hole 42 of the unloading block 4, causing the unloading block 4 to move upward synchronously until the inclined surface of the unloading block 4 contacts the cylindrical test piece 10 on the support frame 2. During this process, the isolating wheel 35 disengages from the cylindrical test piece 10 in the support groove 1. Under the influence of gravity, the cylindrical test piece 10 in the support groove 1 slides downward along the support groove 1 and abuts against the cylindrical test piece 10 located on the support frame 2. Simultaneously, under its own weight, the free end of the interceptor 5 rotates counterclockwise, gradually clearing the path for the cylindrical test piece 10 to slide down the support frame 2. Figure 6 As shown;

[0116] The lifting frame 3 continues to move upward, and the inclined surface of the unloading block 4 drives the cylindrical test piece 10 located on the lifting frame 3 to move upward until the center of gravity of the cylindrical test piece 10 on the lifting frame 3 passes the roller 21 on the left side, thus sliding off the support frame 2 to complete the unloading. During this process, the protruding edge 40 of the unloading block 4 abuts against the left side of the cylindrical test piece 10 located in the support groove 1, preventing the cylindrical test piece 10 from sliding down the support groove 1. Figure 7 As shown,

[0117] The lifting frame 3 continues to move upward until the pushing block 33 contacts the wedge block 34. The wedge block 34 pushes the pushing block 33, causing the connecting rod 32 to move outward and disengage from the blind hole 42. At this time, the unloading block 4 moves downward under gravity, squeezing the lower end of the interceptor 5, causing the free end of the interceptor 5 to tilt upward. Simultaneously, the protrusion 40 disengages from its contact with the cylindrical test piece 10 in the bearing groove 1. A cylindrical test piece 10 in the bearing groove 1 slides down into the bearing frame 2 and is blocked by the interceptor 5. Figure 8 As shown;

[0118] The lifting frame 3 moves downward, causing the pushing block 33 to disengage from the wedge block 34. The connecting rod 32 resets under the action of the compression spring until the isolating wheel 35 contacts a cylindrical test piece 10 still located in the bearing groove 1, preventing the cylindrical test piece 10 located in the bearing frame 2 from contacting the other cylindrical test pieces 10. The lifting frame 3 continues to descend until the roller 21 of the lifting frame 3 presses against the new cylindrical test piece 10 again. During this process, the inner end of the connecting rod 32 re-inserts into the blind hole 42. At this point, a scratch test can be performed on the new cylindrical test piece 10. Figure 9 As shown;

[0119] By repeating the above process, scratch damage tests can be carried out efficiently on several cylindrical test pieces 10 in sequence.

[0120] The above provides a detailed description of the non-planar scratch damage testing device provided by the present invention. The specific embodiments are described only to aid in understanding the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A non-planar scratch damage testing device, characterized in that: include: Mounting rack; The mounting frame is equipped with a bearing groove (1), a bearing frame (2), a lifting frame (3), a unloading block (4), and an interceptor (5). The bearing groove (1) is inclined and is used to guide the cylindrical test piece (10) to slide down; The support frame (2) is located at one end of the support groove (1) and is used to receive the cylindrical test piece (10) that slides down from the inclined support groove (1). The lifting frame (3) is vertically slidably mounted on the mounting frame and located above the support frame (2) for pressing the cylindrical test piece (10) located on the support frame (2); A lifting mechanism is installed between the mounting frame and the lifting frame (3), and the lifting mechanism is used to drive the lifting frame (3) to move up and down; The lifting frame (3) is equipped with a rotating mechanism, which is used to drive the cylindrical test piece (10) pressed by the lifting frame (3) onto the support frame (2) to rotate along the central axis of the cylindrical test piece (10); The lifting frame (3) is equipped with a test needle (30) for pressing against the cylindrical test piece (10) with a certain pressure. The unloading block (4) is movably mounted on the mounting frame and is used to push the cylindrical test piece (10) off the support frame (2) after the test is completed; The interceptor (5) is movably mounted on the support frame (2) to prevent the new cylindrical test piece (10) from slipping onto the support frame (2) and then detaching from the support frame (2) due to motion inertia. The unloading block (4) is vertically slidably installed on the mounting frame and located below the bearing frame (2); The upper surface of the unloading block (4) is inclined from top to bottom toward the side away from the bearing trough (1); The unloading block (4) has connecting ears (41) on both sides of its sidewalls, and blind holes (42) are provided on the connecting ears (41). The lifting frame (3) includes two connecting arms (31), which are located on both sides of the unloading block (4); A connecting rod (32) is slidably mounted on the lower part of the connecting arm (31), and a compression spring for driving the connecting rod (32) to move inward is installed between the connecting arm (31) and the connecting rod (32); The connecting rod (32) is connected to a push block (33) on the outside of the connecting arm (31); The mounting bracket has a wedge block (34) mounted above the push block (33); When the push block (33) moves upward to the wedge block (34) under the action of the lifting mechanism, the wedge block (34) drives the connecting rod (32) to overcome the prestress of the compression spring and move outward, so that the connecting rod (32) disengages from the blind hole (42).

2. The non-planar scratch damage testing device according to claim 1, characterized in that: The lifting frame (3) and the interceptor (5) are connected by a transmission.

3. The non-planar scratch damage testing device according to claim 1, characterized in that: The blind hole (42) is a vertically arranged strip.

4. The non-planar scratch damage testing device according to claim 1, characterized in that: The unloading block (4) has a protruding ridge (40) on the side near the bearing groove (1).

5. The non-planar scratch damage testing device according to claim 2, characterized in that: The interceptor (5) is rotatably mounted on the support frame (2), and the end of the interceptor (5) near the support groove (1) is located below the unloading block (4); When the unloading block (4) moves upward under the drive of the lifting frame (3), the free end of the interceptor (5) moves downward until it gives way to the sliding path of the cylindrical test piece (10) located on the support frame (2); When the unloading block (4) is disengaged from the lifting frame (3) and reset, the free end of the interceptor (5) tilts upward to block the sliding path of the cylindrical test piece (10) located on the support frame (2).

6. The non-planar scratch damage testing device according to claim 5, characterized in that: The hinge point between the interceptor (5) and the support frame (2) is located between the center of gravity of the interceptor (5) and the support groove (1).

7. The non-planar scratch damage testing device according to claim 1, characterized in that: The support frame (2) includes two sets of parallel support wheels; The lifting frame (3) includes two sets of parallel pressing wheels; The bearing wheel assembly and the pressing wheel assembly are both parallel to the cylindrical test piece (10) located on the bearing frame (2); Both the load-bearing wheel assembly and the pressing wheel assembly include rollers (21); The rotating mechanism is a rotating motor, and the power output shaft of the rotating motor is connected to one of the sets of pressing wheels.

8. The non-planar scratch damage testing device according to claim 1, characterized in that: The lifting frame (3) is vertically mounted with a telescopic mechanism, and the test needle (30) is mounted at the lower end of the telescopic mechanism.

9. The non-planar scratch damage testing device according to claim 1, characterized in that: The lifting frame (3) is provided with an isolation wheel (35) on the side near the bearing groove (1). The isolation wheel (35) is used to push the subsequent cylindrical test piece (10) located on the bearing groove (1) away from the cylindrical test piece (10) located on the bearing frame (2) when the lifting frame (3) presses the cylindrical test piece (10) located on the bearing frame (2).

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