A device and method for testing the wear resistance of paint on automobile exterior parts

Abstract

The present invention relates to the technical field of automobile exterior paint wear resistance detection, and specifically proposes a device and method for detecting the wear resistance of automobile exterior paint, wherein the detection device comprises: two fixed platforms, a fixing mechanism and a friction detection mechanism. The present invention cooperates with the reciprocating friction drive group in the friction detection mechanism, the support linkage group and the support group, which not only drives the sample cloth on the arc plate to reciprocate against the side wall of the door handle to simulate the contact friction between the clothes and the side wall of the door handle, but also drives four flexible finger simulation parts up and down through the flexible belt to reciprocate along the hand-pull groove of the door handle to perform arc-shaped reciprocating friction, thereby realizing an integrated test of finger friction and clothing friction, and can comprehensively evaluate the wear resistance of the paint on the door handle from multiple directions, thereby improving the accuracy of the detection.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exterior paint wear resistance detection, and specifically proposes a device and method for detecting the wear resistance of automobile exterior paint. Background Art

[0002] Automotive exterior parts refer to various decorative and functional parts installed on the outside of the car. These parts not only beautify the appearance of the vehicle, but also improve the performance of the car and protect the body. There are many types of automotive exterior parts, covering many parts from the front bumper to the rearview mirror. For example, the door handles make it easier for the driver and passengers to open the door. Most of them are made of metal and have a layer of paint on the surface to ensure that the door handles maintain good appearance and function during long-term use.

[0003] During use, the door handle of a car will not only be subjected to the friction when the user holds the door handle to open the door, but also to the friction when the user's clothes touch the door handle. These frictions will cause wear to the paint on the door handle. Therefore, when testing the wear resistance of the paint on the car door handle, not only a hand-pull friction test but also a clothing friction test is required. If two devices are used to perform the above two tests, the testing cost will be increased and there is also the problem of inconvenience in testing. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a device and method for detecting the wear resistance of paint on automobile exterior parts to solve the technical problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: a device for testing the wear resistance of paint on automobile exterior parts, comprising: two fixed platforms, the fixed platforms are L-shaped, a connecting seat is installed between the two fixed platforms, a fixing mechanism for fixing the door handle is commonly provided on the two fixed platforms, and a friction detection mechanism is commonly installed on the connecting seat and the two fixed platforms.

[0006] The friction detection mechanism includes a cross-shaped mounting groove provided on the connecting seat and penetrating through the side walls arranged along the width and length directions of the connecting seat, the mounting groove extending to the two fixed platforms, the two sides of the mounting groove arranged along the width direction of the connecting seat are slidably connected with a sliding seat 1 and a sliding seat 2 respectively, and a sliding drive group for driving the sliding seat 1 and the sliding seat 2 to move is installed on the two fixed platforms, an arc plate is slidably installed on the top of the sliding seat 1 through a support group, and a sample fabric is installed on the end surface of the arc plate close to the connecting seat, and a fixed frame is arranged on the sliding seat 2, and a fixed frame is connected to the fixed frame There are two T-shaped plates that slide along the width direction and are symmetrically arranged up and down, a flexible belt is installed between the two T-shaped plates near one end of the connecting seat, a middle connecting group is arranged between the flexible belt and the fixed frame, four flexible finger simulation parts are installed on the side of the flexible belt away from the fixed frame, and the four flexible finger simulation parts are used to simulate the contact state when the finger contacts the door handle, and a reciprocating friction drive group is installed between the two T-shaped plates and the fixed frame after the end away from the connecting seat slides through the fixed frame, and a supporting linkage group is arranged between the end surface of the two T-shaped plates near the connecting seat and the arc plate.

[0007] The reciprocating friction drive group is used to drive the two T-shaped plates to move back and forth alternately, driving the four flexible finger simulation parts on the flexible belt to reciprocate and rub the door handle; the reciprocating friction drive group cooperates with the supporting linkage group to synchronously drive the sample fabric on the arc plate to reciprocate and rub the outer wall of the door handle along its arc surface.

[0008] In one possible implementation, the retaining mechanism includes a limit block installed at the top of the vertical section of the fixed table, an L-shaped groove is provided on the horizontal section of the fixed table, the top of the vertical section of the L-shaped groove passes through the fixed table, the vertical section of the L-shaped groove is slidably connected with a retaining roller, a limit roller with a diameter gradually increasing upward is installed on the top of the retaining roller, a sliding plate is installed on the horizontal section of the L-shaped groove, the bottom of the retaining roller is fixedly connected to the sliding plate, connecting grooves connected to the corresponding L-shaped grooves are provided on the opposite surfaces of the two fixed tables, a slot is provided on the sliding seat two, the two sliding plates are connected by a fixed plate, and the fixed plate passes through the slot.

[0009] In one possible implementation, a supplementary pressure plate is installed on the side wall of the abutting roller.

[0010] In one possible implementation, the sliding drive group includes fixing bars installed on the opposite surfaces of sliding seat one and sliding seat two, and both ends of the fixing bars extend into the mounting grooves on the two fixing platforms respectively. A bidirectional screw is rotatably connected in the mounting groove of one of the fixing platforms, and a guide rod is fixedly installed in the mounting groove of the other fixing platform. The bidirectional screw is connected to the two fixing bars by threaded cooperation, and the guide rod is slidably connected to the two fixing bars.

[0011] In one possible implementation, the middle connection group includes a plurality of connection strips evenly arranged along the width direction of the flexible belt installed near the middle of the side wall of the fixing frame, and a fixed shaft is installed on the fixing frame through a bracket, and the fixed shaft passes between the plurality of connection strips and the flexible belt.

[0012] In one possible implementation, the reciprocating friction drive group includes two ear plates fixedly connected to a fixed frame, a gear is rotatably connected between the two ear plates, racks are installed on the opposing surfaces of the upper and lower T-shaped plates through connecting blocks, the upper and lower racks are arranged alternately and are both meshed with the gears for transmission, a cylinder is installed on the fixed frame, and the telescopic end of the cylinder is connected to one of the connecting blocks.

[0013] In one possible implementation, the support group includes an arc-shaped groove opened at the top of a sliding seat, an arc-shaped seat is slidably connected to the arc-shaped groove, a tension spring is installed between the arc-shaped seat and the arc-shaped groove, and the top of the arc-shaped seat is connected to the arc-shaped plate through a plurality of evenly arranged support columns.

[0014] In one possible implementation, the support linkage group includes a wedge block installed on one of the support columns, a push rod is installed at the end of the T-shaped plate located on the lower side away from the fixed frame, the push rod is used to push the inclined surface of the wedge block, and a ball is installed on the push rod. A plug-in groove is opened at the end of the T-shaped plate located on the upper side, an inverted L-shaped plate is installed on the top of the arc plate, and the lower end surface of the horizontal section of the inverted L-shaped plate is installed with evenly arranged balls, and the horizontal section of the inverted L-shaped plate is plugged into the plug-in groove.

[0015] In a possible implementation, a support frame is commonly installed on the top of the two fixing platforms, and the top of the fixing frame is slidably connected to the support frame.

[0016] The present invention also provides a method for testing the wear resistance of paint on automobile exterior trim parts, comprising the following steps: S1. Pressing and fixing: placing a door handle on two fixed platforms, and clamping the L-shaped fasteners at both ends of the door handle on the corresponding limit blocks when placing the door handle, and at the same time, the door handle contacts the side walls of the vertical section of the fixed platform, thereby achieving preliminary positioning of the door handle, and then starting the sliding drive source, which drives the fixed bar to move, and the fixed bar drives two rollers to move through two sliding plates. The two rollers push the door handle to press against the side walls of the vertical section of the fixed platform during the movement, and at the same time, the side walls of the limit rollers contact the arc-shaped side walls of the door handle, and limit the door handle up and down, thereby achieving fixation of the door handle.

[0017] S2. Movement and conflict: The bidirectional screw is driven to rotate by an external driving source. The rotation of the bidirectional screw drives the sliding seat 1 and the sliding seat 2 to move through the threaded cooperation. The sliding seat 1 and the sliding seat 2 approach each other until the arc plate on the sliding seat 1 drives the sample cloth to conflict with the arc-shaped side wall of the door handle, simulating the state when the clothing contacts the arc-shaped side wall of the door handle. At the same time, the sliding seat 2 drives the two T-shaped plates, the flexible belt and the flexible finger simulation part on the flexible belt to move through the fixed frame. The upper and lower T-shaped plates move to the upper and lower sides of the door handle, and at the same time drive the flexible belt and the flexible finger simulation part to deform into a semi-wrapped shape and wrap around the hand pull groove, simulating the contact state between the finger and the hand pull groove.

[0018] S3. Friction test: The reciprocating friction drive group cooperates with the support linkage group and the support group. The reciprocating friction drive group drives the upper and lower T-shaped plates to drive the flexible finger simulation part on the flexible belt to reciprocate and rub the hand pull groove on the door handle, and simultaneously drives the sample fabric on the arc plate to reciprocate and rub the arc side wall of the door handle.

[0019] S4. Test results: The curved plate drives the sample fabric and the flexible belt drives the flexible finger simulation part to repeatedly rub the curved side wall and the hand pull groove surface of the door handle for a specified number of times. Then, by observing the paint condition on the door handle surface, the wear resistance of the paint coating under long-term contact and friction is evaluated.

[0020] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A device for testing the wear resistance of paint on automobile exterior parts designed by the present invention, through the cooperation of the reciprocating friction drive group in the friction detection mechanism with the support linkage group and the support group, not only drives the sample cloth on the arc plate to reciprocate and rub the side wall of the door handle to simulate the contact friction between clothes and the door handle, but also drives four flexible finger simulation parts up and down through the flexible belt to perform arc-shaped reciprocating friction along the hand-pull groove of the door handle, thereby realizing an integrated test of finger friction and clothing friction, comprehensively evaluating the wear resistance of the paint of the door handle from multiple directions, and improving the accuracy of detection.

[0021] 2. The arc plate in the present invention cooperates with the two T-shaped plates through the support linkage group, so that when the reciprocating friction drive group drives the upper and lower T-shaped plates to move back and forth alternately, it can also drive the arc plate to slide back and forth through the plug-in cooperation between the support linkage group and the arc plate, and provide a stable supporting force for the arc plate during its reciprocating movement, thereby further improving the accuracy of detection.

[0022] 3. The sliding drive group in the present invention can not only drive the arc plate and the two T-shaped plates to move away from each other, so as to facilitate the placement and fixation of the door handle, but also drive the two T-shaped plates to pull the flexible belt and the flexible finger simulation part to deform into a semi-wrapped shape and wrap around the hand-pull groove on the door handle after the door handle is fixed, simulating the contact state between the user's fingers and the hand-pull groove when pulling the door handle, thereby improving the friction contact accuracy of the door handle during the subsequent friction test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 It is a first overall three-dimensional structural schematic diagram of the paint wear resistance testing device of the present invention.

[0025] Figure 2 It is a second overall three-dimensional structural schematic diagram of the paint wear resistance testing device of the present invention.

[0026] Figure 3 It is a three-dimensional structural diagram of a door handle.

[0027] Figure 4 It is a structural state diagram of the friction detection mechanism of the present invention rubbing the hand-pull groove of the door handle.

[0028] Figure 5 It is a partial three-dimensional structural schematic diagram of the friction detection mechanism of the present invention.

[0029] Figure 6 It is a schematic diagram of the cross-sectional structure of the sliding drive group, the support group and the fixing mechanism in a top view of the present invention.

[0030] Figure 7 It is a three-dimensional structural schematic diagram of the T-shaped plate, the flexible belt, and the flexible finger simulation member of the present invention.

[0031] Figure numerals: 1, fixed platform; 10, support frame; 2, connecting seat; 3, fixing mechanism; 30, limit block; 31, L-shaped groove; 32, roller; 320, supplementary pressure plate; 33, limit roller; 34, sliding plate; 35, connecting groove; 36, fixed plate; 4, friction detection mechanism; 40, installation groove; 41, sliding seat 1; 42, sliding seat 2; 43, sliding drive group; 430, bidirectional screw; 431, fixing bar; 432, guide rod; 44, arc plate; 45, support group; 450, arc groove; 451, tension spring; 452, Arc seat; 453, support column; 46, fixed frame; 47, middle connecting group; 470, connecting strip; 471, bracket; 472, fixed shaft; 48, reciprocating friction drive group; 480, ear plate; 481, connecting block; 482, gear; 483, rack; 484, cylinder; 49, supporting linkage group; 490, wedge block; 491, push rod; 492, inverted L-shaped plate; 493, plug-in slot; 401, T-shaped plate; 402, flexible belt; 403, flexible finger simulation part; 404, sample fabric; 5, door handle; 50, hand pull slot. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] See also Figure 1 A device for testing the wear resistance of paint on automobile exterior parts comprises: two fixing platforms 1, the fixing platforms 1 are L-shaped, a connecting seat 2 is installed between the two fixing platforms 1, a fixing mechanism 3 for fixing a door handle 5 is commonly provided on the two fixing platforms 1, and a friction detection mechanism 4 is commonly installed on the connecting seat 2 and the two fixing platforms 1.

[0035] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7The friction detection mechanism 4 includes a cross-shaped mounting groove 40 which is opened on the connecting seat 2 and passes through the side walls arranged along the width and length directions thereof. The mounting groove 40 extends toward the two fixed platforms 1. The mounting groove 40 is arranged along the width direction of the connecting seat 2 and is slidably connected to a sliding seat 1 41 and a sliding seat 2 42 on both sides thereof, respectively. A sliding driving group 43 for driving the sliding seat 1 41 and the sliding seat 2 42 to move is installed on the two fixed platforms 1. An arc plate 44 is slidably installed on the top of the sliding seat 1 41 through a support group 45. A sample fabric 404 is installed on the end surface of the arc plate 44 close to the connecting seat 2. A fixing frame 46 is arranged on the sliding seat 2, and a fixing frame 46 is connected to the fixing frame 46 along the width direction thereof. There are two T-shaped plates 401 that slide in the same direction and are symmetrically arranged up and down, a flexible belt 402 is installed between the ends of the two T-shaped plates 401 close to the connecting seat 2, a middle connecting group 47 is arranged between the flexible belt 402 and the fixing frame 46, four flexible finger simulation members 403 are installed on the side of the flexible belt 402 away from the fixing frame 46, and the four flexible finger simulation members 403 are used to simulate the contact state when the finger contacts the door handle 5, and a reciprocating friction drive group 48 is installed between the two T-shaped plates 401 and the fixing frame 46 after the ends away from the connecting seat 2 slide through the fixing frame 46, and a supporting linkage group 49 is arranged between the end faces of the two T-shaped plates 401 close to the connecting seat 2 and the arc plate 44.

[0036] The reciprocating friction drive group 48 is used to drive the two T-shaped plates 401 to move back and forth in an alternating manner, driving the four flexible finger simulation parts 403 on the flexible belt 402 to reciprocate and rub the door handle 5; the reciprocating friction drive group 48 cooperates with the supporting linkage group 49 to synchronously drive the sample fabric 404 on the arc plate 44 to reciprocate and rub along the arc surface of the outer wall of the door handle 5.

[0037] The reciprocating friction drive group 48 cooperates with the support linkage group 49 and the support group 45. It can not only drive the sample cloth 404 on the arc plate 44 to reciprocate and rub the side wall of the door handle 5, simulating the friction when the user wears clothes and contacts the side wall of the door handle 5 in daily life, but also drive the four flexible finger simulation parts 403 up and down through the flexible belt 402 to perform arc-shaped reciprocating friction along the hand-pull groove 50 of the door handle 5, thereby realizing the integrated function of detecting the wear resistance of the paint on the door handle 5 through the friction of fingers and clothes on the door handle 5, and can comprehensively evaluate the wear resistance of the paint on the door handle 5.

[0038] See also Figure 1 , Figure 2 and Figure 6The fixing mechanism 3 includes a limit block 30 installed at the top of the vertical section of the fixed table 1, an L-shaped groove 31 is opened on the horizontal section of the fixed table 1, the top of the vertical section of the L-shaped groove 31 passes through the fixed table 1, the vertical section of the L-shaped groove 31 is slidably connected with a roller 32, and a limit roller 33 with a diameter gradually increasing upward is installed on the top of the roller 32, a sliding plate 34 is installed on the horizontal section of the L-shaped groove 31, and the bottom of the roller 32 is fixedly connected to the sliding plate 34, and the opposite surfaces of the two fixed tables 1 are opened with connecting grooves 35 connected with the corresponding L-shaped grooves 31, and a slot is opened on the sliding seat 42, and the two sliding plates 34 are connected by a fixed plate 36, and the fixed plate 36 passes through the slot.

[0039] A sliding drive source (such as an electric slider) is installed on one of the fixed platforms 1 to drive the fixed plate 36 to move. The two ends of the door handle 5 are placed on the two fixed platforms 1. When placing, the L-shaped fasteners at both ends of the door handle 5 are clamped on the corresponding limit blocks 30. At the same time, the door handle 5 contacts the side wall of the vertical section of the fixed platform 1, thereby achieving preliminary positioning of the door handle 5. Then, the sliding drive source is started, and the sliding drive source drives the fixed plate 36 to move. The fixed plate 36 drives the two abutting rollers 32 to move through the two sliding plates 34. During the movement, the two abutting rollers 32 push the door handle 5 to contact the side wall of the vertical section of the fixed platform 1. At the same time, the side wall of the limit roller 33 contacts the arc-shaped side wall of the door handle 5, and the door handle 5 is limited up and down, thereby achieving the fixation of the door handle 5, avoiding the shaking of the door handle 5 during the detection process, which affects the detection accuracy.

[0040] See also Figure 1 A supplementary pressure plate 320 is installed on the side wall of the roller 32. The supplementary pressure plate 320 moves with the roller 32 to press the side wall of the door handle 5 to increase the pressing and fixing area of ​​the door handle 5.

[0041] See also Figure 6 The sliding drive group 43 includes fixing bars 431 installed on the opposite surfaces of the sliding seat 1 41 and the sliding seat 2 42, and the two ends of the fixing bars 431 extend into the mounting grooves 40 on the two fixed platforms 1 respectively. A bidirectional screw 430 is rotatably connected in the mounting groove 40 of one of the fixed platforms 1, and a guide rod 432 is fixedly installed in the mounting groove 40 of the other fixed platform 1. The bidirectional screw 430 is connected to the two fixing bars 431 by threaded matching, and the guide rod 432 is slidably connected to the two fixing bars 431.

[0042] In the initial state, the T-plate 401 is far away from the curved plate 44 to facilitate the placement of the door handle 5. After the retaining mechanism 3 fixes the door handle 5, the bidirectional screw 430 is driven to rotate by an external drive (such as manual or motor). The rotation of the bidirectional screw 430 drives the sliding seat 1 41 and the sliding seat 2 42 to move through the threaded cooperation. The sliding seat 1 41 and the sliding seat 2 42 approach each other until the curved plate 44 on the sliding seat 1 41 drives the sample cloth 404 to collide with the curved side wall of the door handle 5, simulating the state when the clothing contacts the curved side wall of the door handle 5. At the same time, the sliding seat 2 42 drives the two T-plates 401 and the flexible belt 402 and the flexible finger simulation piece 403 on the flexible belt 402 to move through the fixing frame 46. The upper and lower T-plates 401 move to the upper and lower sides of the door handle 5, and at the same time drive the flexible belt 402 and the flexible finger simulation piece 403 to deform into a semi-wrapped shape and wrap around the hand-pull groove 50 of the door handle 5 (such as Figure 4 As shown), the contact state between the finger and the hand-pull groove 50 when pulling the door handle 5 is simulated, thereby improving the authenticity of the friction contact when the door handle 5 is subsequently subjected to a friction test.

[0043] See also Figure 4 and Figure 5 The middle connection group 47 includes a plurality of connection strips 470 evenly arranged along the width direction of the flexible belt 402 installed near the middle of the side wall of the fixing frame 46. A fixed shaft 472 is installed on the fixing frame 46 through a bracket 471. The fixed shaft 472 passes through the plurality of connection strips 470 and the flexible belt 402. The fixed shaft 472 cooperates with the connection strips 470 to support the middle part of the flexible belt 402 to prevent the flexible belt 402 and the flexible finger simulation part 403 from falling when they are away from the door handle 5, thereby hindering the movement of the sliding seat 2 42, and will not affect the movement of the upper and lower T-shaped plates 401 when pulling the flexible belt 402 to move.

[0044] See also Figure 4 and Figure 5The reciprocating friction drive group 48 includes two ear plates 480 fixedly connected to the fixed frame 46, and a gear 482 is rotatably connected between the two ear plates 480. The opposite surfaces of the upper and lower T-shaped plates 401 are both installed with racks 483 through connecting blocks 481. The upper and lower racks 483 are staggered and meshed with the gear 482 for transmission. A cylinder 484 is installed on the fixed frame 46. The telescopic end of the cylinder 484 is connected to one of the connecting blocks 481. The cylinder 484 drives the connecting block 481 connected thereto to drive the connected T-shaped plate 401 and the rack 483 to reciprocate. The rack 483 drives the other rack 483, the connecting block 481 and the T-shaped plate 401 to move through the meshing transmission with the gear 482, thereby realizing the staggered reciprocating movement of the two T-shaped plates 401, and the two T-shaped plates 401 drive the four flexible finger simulation parts 403 on the flexible belt 402 to rub back and forth along the hand-pull groove 50 on the door handle 5, simulating the action of holding the door handle 5 by hand to open the door in actual use. After repeatedly rubbing the surface of the door handle 5 for a specified number of times, the paint wear on the surface of the door handle 5 is observed to evaluate the wear resistance of the paint coating.

[0045] See also Figure 1 and Figure 6 The support group 45 includes an arc groove 450 opened on the top of the sliding seat 41, and an arc seat 452 is slidably connected to the arc groove 450. A tension spring 451 is installed between the arc seat 452 and the arc groove 450. The top of the arc seat 452 is connected to the arc plate 44 through a plurality of support columns 453 that are evenly arranged.

[0046] See also Figure 1 and Figure 5 The supporting linkage group 49 includes a wedge block 490 installed on one of the supporting columns 453, and a push rod 491 is installed at the end of the T-shaped plate 401 located on the lower side away from the fixing frame 46. The push rod 491 is used to push the inclined surface of the wedge block 490, and a ball is installed on the push rod 491. A plug-in groove 493 is opened at the end of the T-shaped plate 401 located on the upper side, and an inverted L-shaped plate 492 is installed on the top of the arc plate 44. The lower end surface of the horizontal section of the inverted L-shaped plate 492 is installed with evenly arranged balls, and the horizontal section of the inverted L-shaped plate 492 is plugged into the plug-in groove 493.

[0047] After the door handle 5 is fixed, the sliding drive group 43 drives the sliding seat 1 41 and the sliding seat 2 42 to approach each other until the arc plate 44 on the sliding seat 1 41 drives the sample fabric 404 to collide with the arc-shaped side wall of the door handle 5, and at the same time, the sliding seat 2 42 drives the two T-shaped plates 401 and the flexible belt 402 and the flexible finger simulation member 403 on the flexible belt 402 to move through the fixing frame 46, so that the flexible finger simulation member 403 is in conflict with the hand-pull groove 50 on the door handle 5, and at this time, the inverted L-shaped plate 492 on the arc plate 44 is inserted into the plug-in groove 493, and the plug-in groove 493 cooperates with the inverted L-shaped plate 492 to support the arc plate 44 during the reciprocating movement of the arc plate 44, thereby improving the stability of the arc plate 44.

[0048] Then, in the process of the reciprocating friction drive group 48 driving the upper and lower T-shaped plates 401 to move alternately and reciprocatingly toward the door handle 5, the T-shaped plate 401 located on the lower side moves toward the door handle 5, thereby driving the push rod 491 to move, and the ball on the push rod 491 pushes the wedge block 490. Under the action of the thrust force, the wedge block 490 pushes the support column 453 connected to it and the arc seat 452 at its lower end to move along the arc groove 450. When the arc seat 452 moves, it pulls the retracting spring 451 to extend, and at the same time, the arc seat 452 drives the arc plate through the support column 453. 44 moves, thereby causing the sample fabric 404 on the curved plate 44 to rub against the curved side wall of the door handle 5; when the T-plate 401 located on the lower side moves in the direction away from the door handle 5, the curved seat 452 drives the curved plate 44 to reset under the elastic force of the retracting spring 451, thereby causing the curved plate 44 to drive the sample fabric 404 to rub back and forth on the curved side wall of the door handle 5, and repeatedly rub the surface of the door handle 5 for a specified number of times, thereby evaluating the wear resistance of the paint coating on the curved side wall of the door handle 5 when rubbed by clothing.

[0049] To summarize, by cooperating with the support linkage group 49 and the support group 45, the reciprocating friction drive group 48 drives the upper and lower T-shaped plates 401 to drive the flexible finger simulation part 403 on the flexible belt 402 to reciprocate and rub the hand-pull groove 50 on the door handle 5, and simultaneously drives the sample fabric 404 on the arc plate 44 to reciprocate and rub the arc-shaped side wall of the door handle 5, thereby realizing the integrated drive of the sample fabric 404 reciprocating friction test and the finger reciprocating friction test, saving the driving source and the friction test detection time.

[0050] See also Figure 1 A support frame 10 is installed on the top of the two fixed platforms 1, and the top of the fixed frame 46 is slidably connected to the support frame 10, thereby improving the stability of the fixed frame 46 when moving.

[0051] See also Figure 1-Figure 7The present invention also provides a method for testing the wear resistance of paint on automobile exterior parts, comprising the following steps: S1. Pressing and fixing: placing the door handle 5 on two fixed platforms 1, and clamping the L-shaped fasteners at both ends of the door handle 5 on the corresponding limit blocks 30 when placing the door handle 5, and at the same time, the door handle 5 contacts the side wall of the vertical section of the fixed platform 1, thereby achieving preliminary positioning of the door handle 5, and then starting the sliding drive source, the sliding drive source drives the fixed bar 431 to move, and the fixed bar 431 drives the two rollers 32 to move through the two sliding plates 34. The two rollers 32 push the door handle 5 to contact the side wall of the vertical section of the fixed platform 1 during the movement, and at the same time, the side wall of the limit roller 33 contacts the arc-shaped side wall of the door handle 5, and the door handle 5 is limited up and down, thereby achieving the fixation of the door handle 5.

[0052] S2. Movement and conflict: The bidirectional screw 430 is driven to rotate by an external driving source. The rotation of the bidirectional screw 430 drives the sliding seat 1 41 and the sliding seat 2 42 to move through the threaded cooperation. The sliding seat 1 41 and the sliding seat 2 42 approach each other until the arc plate 44 on the sliding seat 1 41 drives the sample cloth 404 to conflict with the arc-shaped side wall of the door handle 5, simulating the state when the clothing contacts the arc-shaped side wall of the door handle 5. At the same time, the sliding seat 2 42 drives the two T-shaped plates 401 and the flexible belt 402 and the flexible finger simulation piece 403 on the flexible belt 402 to move through the fixed frame 46. The upper and lower T-shaped plates 401 move to the upper and lower sides of the door handle 5, and at the same time drive the flexible belt 402 and the flexible finger simulation piece 403 to deform into a semi-wrapped shape and wrap around the hand-pull groove 50, simulating the contact state between the finger and the hand-pull groove 50.

[0053] S3. Friction test: The reciprocating friction drive group 48 cooperates with the support linkage group 49 and the support group 45. The reciprocating friction drive group 48 drives the upper and lower T-shaped plates 401 to drive the flexible finger simulation part 403 on the flexible belt 402 to reciprocate and rub the hand-pull groove 50 on the door handle 5, and simultaneously drives the sample cloth 404 on the arc plate 44 to reciprocate and rub the arc-shaped side wall of the door handle 5.

[0054] S4. Test results: The curved plate 44 drives the sample cloth 404 and the flexible belt 402 drives the flexible finger simulation part 403 to repeatedly rub the curved side wall of the door handle 5 and the surface of the hand-pulling groove 50 for a specified number of times, and then the paint condition on the surface of the door handle 5 is observed to evaluate the wear resistance of the paint coating under long-term contact and friction.

[0055] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for testing the wear resistance of paint on automobile exterior parts, characterized in that: include: Two fixed platforms (1), the fixed platforms (1) are L-shaped, a connecting seat (2) is installed between the two fixed platforms (1), a fixing mechanism (3) for fixing the door handle (5) is commonly provided on the two fixed platforms (1), and a friction detection mechanism (4) is commonly installed on the connecting seat (2) and the two fixed platforms (1); The friction detection mechanism (4) comprises a cross-shaped mounting groove (40) provided on the connecting seat (2) and penetrating through the side wall arranged along the width and length direction thereof, the mounting groove (40) extending toward the two fixed platforms (1), the two sides of the mounting groove (40) arranged along the width direction of the connecting seat (2) are respectively slidably connected with a sliding seat 1 (41) and a sliding seat 2 (42), the two fixed platforms (1) are jointly provided with a sliding drive group (43) for driving the sliding seat 1 (41) and the sliding seat 2 (42) to move, the top of the sliding seat 1 (41) is slidably provided with an arc plate (44) through a support group (45), the end surface of the arc plate (44) close to the connecting seat (2) is provided with a sample fabric (404), the sliding seat 2 (42) is provided with a fixing frame (46), and the fixing frame (46) is connected with a fixing frame (46) along the width direction thereof. Two T-shaped plates (401) are arranged symmetrically in the vertical direction and slide in the same direction. A flexible belt (402) is installed between the ends of the two T-shaped plates (401) close to the connecting seat (2). A middle connecting group (47) is arranged between the flexible belt (402) and the fixing frame (46). Four flexible finger simulation members (403) are installed on the side of the flexible belt (402) away from the fixing frame (46). The four flexible finger simulation members (403) are used to simulate the contact state when the finger contacts the door handle (5). After the ends of the two T-shaped plates (401) away from the connecting seat (2) slide through the fixing frame (46), a reciprocating friction driving group (48) is installed between the fixing frame (46). A supporting linkage group (49) is arranged between the end surfaces of the two T-shaped plates (401) close to the connecting seat (2) and the arc-shaped plate (44); The reciprocating friction driving group (48) is used to drive the two T-shaped plates (401) to move back and forth in an alternating manner, thereby driving the four flexible finger simulation members (403) on the flexible belt (402) to perform reciprocating friction on the door handle (5); the reciprocating friction driving group (48) cooperates with the supporting linkage group (49) to synchronously drive the sample cloth (404) on the arc plate (44) to perform reciprocating friction on the outer wall of the door handle (5) along its arc surface.

2. According to claim 1, a device for testing the wear resistance of paint for automobile exterior parts, characterized in that: The fixing mechanism (3) comprises a limit block (30) installed at the top of the vertical section of the fixed platform (1); an L-shaped groove (31) is provided at the horizontal section of the fixed platform (1); the top of the vertical section of the L-shaped groove (31) passes through the fixed platform (1); the vertical section of the L-shaped groove (31) is slidably connected with a stop roller (32); a limit roller (33) with a diameter gradually increasing upwards is installed at the top of the stop roller (32); a sliding plate (34) is installed at the horizontal section of the L-shaped groove (31); the bottom of the stop roller (32) is fixedly connected to the sliding plate (34); the opposite surfaces of the two fixed platforms (1) are provided with connecting grooves (35) connected to the corresponding L-shaped grooves (31); a slot is provided on the sliding seat (42); the two sliding plates (34) are connected via a fixed plate (36); and the fixed plate (36) passes through the slot.

3. The wear resistance testing device for paint of automobile exterior parts according to claim 1, characterized in that: The sliding drive group (43) comprises a fixing bar (431) installed on the opposite surfaces of the sliding seat 1 (41) and the sliding seat 2 (42), and the two ends of the fixing bar (431) respectively extend into the mounting grooves (40) on the two fixed platforms (1), a bidirectional screw rod (430) is rotatably connected in the mounting groove (40) of one of the fixed platforms (1), and a guide rod (432) is fixedly installed in the mounting groove (40) of the other fixed platform (1), the bidirectional screw rod (430) and the two fixing bars (431) are connected by threaded engagement, and the guide rod (432) and the two fixing bars (431) are slidably connected.

4. The wear resistance testing device for paint of automobile exterior parts according to claim 1, characterized in that: The reciprocating friction drive group (48) comprises two ear plates (480) fixedly connected to a fixed frame (46), a gear (482) being rotatably connected between the two ear plates (480), racks (483) being installed on the opposite surfaces of the upper and lower T-shaped plates (401) through connecting blocks (481), the upper and lower racks (483) being arranged alternately and meshing with the gear (482) for transmission, a cylinder (484) being installed on the fixed frame (46), and a telescopic end of the cylinder (484) being connected to one of the connecting blocks (481).

5. The wear resistance testing device for paint of automobile exterior parts according to claim 1, characterized in that: The support group (45) includes an arc groove (450) opened on the top of the sliding seat (41), an arc seat (452) is slidably connected to the arc groove (450), a tension spring (451) is installed between the arc seat (452) and the arc groove (450), and the top of the arc seat (452) is connected to the arc plate (44) through a plurality of evenly arranged support columns (453).

6. The wear resistance testing device for paint of automobile exterior parts according to claim 5, characterized in that: The supporting linkage group (49) comprises a wedge block (490) mounted on one of the supporting columns (453); a push rod (491) is mounted on the end of the T-shaped plate (401) located on the lower side away from the fixing frame (46); the push rod (491) is used to push the inclined surface of the wedge block (490); a ball bearing is mounted on the push rod (491); a plug-in groove (493) is formed at the end of the T-shaped plate (401) located on the upper side; an inverted L-shaped plate (492) is mounted on the top of the arc plate (44); the lower end surface of the horizontal section of the inverted L-shaped plate (492) is mounted with evenly arranged ball bearings; and the horizontal section of the inverted L-shaped plate (492) is plugged into the plug-in groove (493).

7. The wear resistance testing device for paint of automobile exterior parts according to claim 1, characterized in that: The middle connection group (47) comprises a plurality of connection strips (470) evenly arranged along the width direction of the flexible belt (402) and installed near the middle of the side wall of the fixing frame (46); a fixing shaft (472) is installed on the fixing frame (46) via a bracket (471); and the fixing shaft (472) passes between the plurality of connection strips (470) and the flexible belt (402).

8. The wear resistance testing device for paint of automobile exterior parts according to claim 1, characterized in that: A support frame (10) is commonly installed on the tops of the two fixed platforms (1), and the top of the fixed frame (46) is slidably connected to the support frame (10).

9. The wear resistance testing device for paint of automobile exterior parts according to claim 2, characterized in that: A supplementary pressure plate (320) is installed on the side wall of the abutting roller (32).

10. A method for testing the wear resistance of paint on automobile exterior parts, using the device for testing the wear resistance of paint on automobile exterior parts as claimed in claim 1, characterized in that: The following steps are involved: S1. Pressing and fixing: placing the door handle (5) on two fixed platforms (1), and fixing the curved side walls and upper and lower sides of the door handle (5) by the pressing and fixing mechanism (3); S2. Movement and contact: The sliding seat 1 (41) and the sliding seat 2 (42) are driven to move by the sliding drive group (43), and the sliding seat 1 (41) and the sliding seat 2 (42) are moved close to each other until the arc plate (44) on the sliding seat 1 (41) drives the sample fabric (404) to contact the arc-shaped side wall of the door handle (5), and the sliding seat 2 (42) drives the two T-shaped plates (401) and the flexible belt (402) and the flexible finger simulation member (403) on the flexible belt (402) to move through the fixing frame (46), and are wrapped around the door handle (5) in a semi-wrapped shape, simulating the contact state between the finger and the door handle (5); S3. Friction test: The reciprocating friction drive group (48) cooperates with the support linkage group (49) and the support group (45), and the reciprocating friction drive group (48) drives the upper and lower T-shaped plates (401) to drive the flexible finger simulation member (403) on the flexible belt (402) to reciprocate and rub the hand pull groove (50) on the door handle (5), and simultaneously drives the sample cloth (404) on the arc plate (44) to reciprocate and rub the arc-shaped side wall of the door handle (5); S4. Test results: The curved plate (44) drives the sample cloth (404) and the flexible belt (402) drives the flexible finger simulation part (403) to repeatedly rub the surface of the door handle (5) at a specified number of times, and then the paint condition on the surface of the door handle (5) is observed to evaluate the wear resistance of the paint coating under long-term contact and friction.

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