Friction testing equipment

Abstract

The present invention relates to the field of fatigue testing equipment, and in particular to a friction testing equipment, including a frame, a shell, a workstation, a first clamping mechanism, a second clamping mechanism and a lifting mechanism; the shell includes an outer shell and a platform, the outer shell has an inner cavity, the platform is arranged in the inner cavity and connected to the inner wall of the outer shell; the first clamping mechanism and the second clamping mechanism are arranged on the platform at intervals, the first clamping mechanism is used to clamp the headband, and the second clamping mechanism is used to clamp the frame; the workstation includes a driving assembly, a mold, a profiling jig and a table, the profiling jig is rotatably connected to the table so that the profiling jig rotates around its own axis, and the driving assembly is used to drive the profiling jig to rotate; the mold sleeve is arranged on the outer peripheral surface of the profiling jig, and the glasses sleeve is arranged on the outer peripheral surface of the mold; the lifting mechanism is installed on the platform, and the lifting mechanism is used to drive the table to move up and down. The present invention can perform friction testing methods of only rotating friction, only up and down friction, and a combination of the two on the product.

Description

Technical Field

[0001] The invention belongs to the technical field of fatigue testing equipment, and in particular relates to a friction testing equipment. Background Art

[0002] Fabric pilling refers to the obvious surface changes caused by the protrusion of fibers on the fabric surface or the extension of fiber ends to form fluff, and pilling refers to the process of forming pilling on the fabric surface. In AR glasses or VR glasses, the surface of the headband and frame will be more or less attached with a layer of fabric to better fit the user's skin. In general, the test method for fabric pilling is to use a nylon brush and fabric abrasive to rub the test sample to pilling, and then evaluate the pilling performance under specified lighting conditions.

[0003] The existing friction test instrument includes a workbench for placing the product and a test bench, on which a mold and a motor are set. Generally, the fabric is fixed on the workbench, and the mold is driven to rotate by the motor. The test bench approaches the workbench along a predetermined route, thereby driving the mold to gradually approach the fabric and rub against the fabric. After the friction test, the mold stops rotating and moves away from the fabric, and the fabric is removed and observed.

[0004] However, the friction of fabrics in real life is quite complicated, and existing friction testing instruments only simulate one type of friction, resulting in limited testing results. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in view of the fact that fabric friction in real life is relatively complicated, the existing friction testing instruments only simulate one friction mode and the test effect is limited, and a friction testing device is provided.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a friction testing device, including a mirror frame, a shell, a workstation, a first clamping mechanism, a second clamping mechanism and a lifting mechanism; the shell includes an outer shell and a platform, the outer shell has an inner cavity, the platform is arranged in the inner cavity and connected to the inner wall of the outer shell;

[0007] The frame has a first connection portion and a second connection portion, wherein the first connection portion is used to connect one end of a headband, and the second connection portion is used to connect the other end of the headband, so that the frame and the headband form glasses;

[0008] The first clamping mechanism and the second clamping mechanism are arranged on the platform at intervals, the first clamping mechanism is used to clamp the headband, and the second clamping mechanism is used to clamp the frame;

[0009] The workstation table includes a driving assembly, a mold, a profiling jig and a table. The profiling jig is connected to the table around a preset axis and the driving assembly is used to drive the profiling jig to rotate; the mold is mounted on the outer peripheral surface of the profiling jig, and the glasses are mounted on the outer peripheral surface of the mold;

[0010] The lifting mechanism is installed on the platform, and the lifting mechanism is used to drive the platform to rise and fall.

[0011] According to the friction testing equipment of the embodiment of the present invention, the lifting component in this embodiment is used to drive the table and the profiling jig and the mold thereon to move up and down, and the driving component is used to drive the profiling jig and the mold to rotate. Therefore, in this embodiment, only the driving component can be started to drive the profiling jig and the mold to rotate, and the inner wall of the headband and the inner wall of the glasses can be rubbed. Of course, only the lifting mechanism can be started to drive the profiling jig and the mold to slide up and down, and the inner wall of the headband and the inner wall of the glasses can be rubbed up and down. In this embodiment, the driving component and the lifting mechanism can also be started at the same time, driving the profiling jig and the friction to rotate and lift up and down, and rub the inner wall of the headband and the glasses in the up and down directions and circumferential directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 An overall schematic diagram of a friction testing device provided by an embodiment of the present invention;

[0013] Figure 2 A schematic structural diagram of a friction testing device provided by an embodiment of the present invention with part of the outer shell removed;

[0014] Figure 3 A diagram showing the internal structure of a friction testing device provided by an embodiment of the present invention with the outer shell removed;

[0015] Figure 4 A schematic structural diagram of glasses of a friction testing device provided by an embodiment of the present invention;

[0016] Figure 5 A partial exploded schematic diagram of a workstation of a friction testing device provided in one embodiment of the present invention;

[0017] Figure 6 An overall schematic diagram of a first clamping mechanism of a friction testing device provided in one embodiment of the present invention;

[0018] Figure 7 A side view of a first clamping mechanism of a friction testing device provided by an embodiment of the present invention;

[0019] Figure 8 A partial side view of a first clamping mechanism of a friction testing device provided in one embodiment of the present invention;

[0020] Fig. 9An overall schematic diagram of a second clamping mechanism of a friction testing device provided in one embodiment of the present invention;

[0021] Fig.10 An exploded schematic diagram of a platen of a friction testing device provided in one embodiment of the present invention;

[0022] Fig.11 A schematic diagram of the structure of a drive assembly of a friction testing device provided in one embodiment of the present invention.

[0023] The reference numerals in the specification are as follows: 1, housing; 11, platform; 12, linear bearing; 13, guide column; 2, glasses; 21, headband; 22, frame; 23, first connecting portion; 3, first clamping mechanism; 31, seat; 311, first base; 3111, first pin hole; 312, first claw seat; 313, first bottom plate; 314, first locking member; 314, first through hole; 32, substrate; 321, first side wall; 3 22, second side wall; 323, third side wall; 324, fourth side wall; 325, first sub-plate; 326, second sub-plate; 327, first notch; 328, second notch; 329, cavity; 331, first rotating seat; 332, first claw; 3321, first protrusion; 3322, first through groove; 333, first spring; 334, second rotating seat; 335, second claw; 3351, second protrusion; 336, second spring; 337, first slide rail; 338, first locking bolt; 339, second locking bolt; 4, second clamping mechanism; 41, second base; 4111, second pin hole; 42, second claw seat; 43, second slide rail; 44, second locking piece; 441, second through hole; 45, second bottom plate; 46, cylinder clamp; 461, clamp; 5, lifting mechanism; 6, work station; 61, drive assembly; 611, motor; 612, same Step belt; 613, first gear; 614, second gear; 615, tensioning wheel; 62, rotating shaft; 63, rotating bearing; 64, rotating platform; 641, positioning column; 65, grinding tool; 66, profiling fixture; 661, slot; 662, cylinder; 663, profiling nose; 67, clamp; 68, connecting piece; 69, table plate; 691, table shell; 692, top plate; 693, accommodating cavity; 694, rotating hole; 7, grating ruler. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] like Figures 1 to 5As shown, an embodiment of the present invention provides a friction testing device, including a frame 22, a shell 1, a workstation 6, a first clamping mechanism 3, a second clamping mechanism 4 and a lifting mechanism 5; the shell 1 includes an outer shell and a platform 11, the outer shell has an inner cavity, the platform 11 is arranged in the inner cavity and connected to the inner wall of the outer shell; the first clamping mechanism 3 and the second clamping mechanism 4 are arranged on the platform 11 at intervals, the first clamping mechanism 3 is used to clamp the headband 21, and the second clamping mechanism 4 is used to clamp the frame 22.

[0026] Reference Figure 5 The workstation 6 includes a driving assembly 61, a mold 65, a profiling jig 66 and a table 69. The profiling jig 66 is rotatably connected to the table 69 so that the profiling jig 66 rotates around a preset axis. In this embodiment, the profiling jig is roughly cylindrical, so the preset axis is its own axis. The driving assembly 61 is used to drive the profiling jig 66 to rotate; the mold 65 is sleeved on the outer circumferential surface of the profiling jig 66, and the glasses 2 are sleeved on the outer circumferential surface of the mold 65; the lifting mechanism 5 is used to drive the table 69 to move up and down.

[0027] This embodiment mainly rubs the glasses 2, that is, rubs the headband 21 and the frame 22. The profiling jig 66 is modeled with reference to the structure of a human skull to simulate the friction between the frame 22 and the headband 21 in the actual application process.

[0028] Because the glasses 2 are actually used in various ways of friction, the present embodiment can only start the driving assembly 61 to drive the profiling jig 66 and the grinding tool 65 to rotate, and rub the inner wall of the headband 21 and the inner wall of the glasses 2. Of course, the lifting mechanism 5 can also be started to drive the profiling jig 66 and the grinding tool 65 to slide up and down, and rub the inner wall of the headband 21 and the inner wall of the glasses 2 up and down. The present embodiment can also start the driving assembly 61 and the lifting mechanism 5 at the same time, drive the profiling jig 66 and the friction while rotating and lifting up and down, and rub the inner wall of the headband 21 and the inner wall of the glasses 2 in the up and down direction and the circumferential direction. It can be seen that there are many test modes in the present embodiment to choose from. Compared with the prior art that only rotates the grinding tool 65, the friction of the present embodiment is closer to real life, the friction test is more realistic, and the test effect is close to reality.

[0029] In this embodiment, the abrasive tool 65 is a ski cloth, which is wrapped around the outer surface of the profiling jig 66 and mounted on the profiling jig 66 via two hoops 67 or a pipe hoop. In other embodiments, the abrasive tool 65 may also be sandpaper, a grinding wheel, or the like.

[0030] Reference Figure 4In this embodiment, the glasses 2 are formed by a frame 22 and a headband 21. The headband 21 is a long strip of cloth, and the frame 22 is a VR glasses 2 frame 22 or an AR glasses 2 frame 22. The frame 22 has a first connecting portion 23 and a second connecting portion. The first connecting portion 23 is used to connect one end of the headband 21, and the second connecting portion is used to connect the other end of the headband 21, so that the frame 22 and the headband 21 form the glasses 2; the first connecting portion 23 and the second connecting portion have the same structure, specifically a clamping seat and a clamping bolt, wherein the clamping seat is installed on the frame 22, and a through hole is provided on the headband 21. The clamping bolt passes through the through hole and is threadedly connected with the clamping seat, so that the clamping seat and the clamping bolt can clamp the headband 21. There are multiple clamping bolts, and the multiple clamping bolts are arranged at intervals. By connecting one of the multiple clamping bolts arranged at intervals with the headband 21, the glasses 2 can be adjusted to be suitable for the profiling jig 66 of different diameters.

[0031] The profiling jig 66 includes a cylinder 662 and a profiling nose 663. The profiling nose 663 is in the shape of an elongated strip and is arranged on the outer surface of the cylinder 662. The length direction of the profiling nose 663 is parallel to the axis of the cylinder 662. In this embodiment, the circumference of the cylinder 662 is mainly based on the circumference of a person's head, and the position of the profiling nose 663 is also based on the position of the human nose relative to the head. In this embodiment, the profiling jig 66 is simplified to facilitate the processing of the profiling jig 66 and reduce production costs.

[0032] The workstation 6 also includes a rotating shaft 62, a rotating shaft 62 bearing and a rotating platform 64. A rotating hole 694 is provided on the table 69. The rotating shaft 62 bearing is provided in the rotating hole 694. The rotating shaft 62 is rotatably connected to the rotating shaft 62 bearing. The rotating platform 64 is installed at one end of the rotating shaft 62. The other end of the rotating shaft 62 is connected to the driving assembly 61. The profiling jig 66 is provided on the rotating platform 64. The rotating shaft 62 bearing and the rotating shaft 62 are used to achieve a smooth rotation effect.

[0033] As an example, a positioning column 641 is provided on the rotating platform 64, and a positioning groove is provided on the surface of the cylinder 662 close to the rotating platform 64, and the positioning column 641 is plugged into the positioning groove. The profiling jig 66 also includes a connecting member 68, and a slot 661 is provided on the side wall of the cylinder 662. One end of the connecting member 68 is inserted into the slot 661, and the other end of the connecting member 68 is detachably connected to the rotating platform 64 by a bolt. When the profiling jig 66 is installed, the positioning and fixing of the cylinder 662 on the rotating platform 64 is achieved by the positioning column 641 and the positioning groove. In this embodiment, two positioning columns 641 are provided, and the diameters of the two positioning columns 641 are different, so as to perform positioning faster. Of course, in other embodiments, the positioning column 641 can be one or more. The diameters of multiple positioning columns 641 can be the same or different. Multiple positioning columns 641 are arranged at intervals.

[0034] In this embodiment, the platform 11 divides the inner cavity of the shell 1 into an upper cavity and a lower cavity, the lifting mechanism 5 is arranged in the lower cavity, the profiling jig 66 is arranged in the upper cavity, the lifting assembly is a lead screw nut, wherein the nut in the lead screw nut is fixed to the table 69, the lead screw is fixed on the platform 11, and a perforation is arranged on the platform 11, and the perforation is used for the nut of the lead screw nut to move back and forth, and a plurality of linear bearings 12 are arranged on the table 69 at intervals, and a guide shaft is arranged in each linear bearing 12, and the guide shaft is slidably connected to the linear bearing 12, one end of the guide shaft is connected to the table 69, and the other end extends into the lower cavity, and the table 69 is assisted to slide up and down by the linear bearing 12 and the guide shaft. The lifting mechanism 5 drives the table 69 to move up and down relative to the platform 11, and the profiling jig 66 and the grinding tool 65 on the table 69 also move up and down relative to the platform 11, thereby rubbing the glasses 2.

[0035] In other embodiments, the lifting mechanism 5 may also be a cylinder, a hydraulic cylinder, an electric slide, etc.

[0036] Reference Figure 5 , Fig.10 and Fig.11 In this embodiment, the driving assembly 61 includes a motor 611 and a synchronous belt 612. Fig.11 In the figure, the dotted line is a synchronous belt, a first gear 613 is provided on the rotating shaft 62, a second gear 614 is provided on the motor 611, and the synchronous belt 612 meshes with the first gear 613 and the second gear 614 at the same time. When the motor 611 is started, the motor 611 drives the second gear 614 to rotate, the second gear 614 drives the synchronous belt 612 to rotate, the synchronous belt 612 drives the first gear 613 to rotate, the first gear 613 drives the rotating shaft 62 to rotate, the rotating shaft 62 drives the rotating platform 64 and the contouring jig 66 thereon to rotate, so that the mold 65 rotates relative to the glasses 2, and the rotational friction test starts.

[0037] Reference Fig.10 and Fig.11 In this embodiment, the table plate 69 includes a table shell 691 and a top plate 692, the table shell 691 has a accommodating cavity 693, the top plate 692 is connected to the table shell 691 and closes the accommodating cavity 693, the rotating shaft 62 is supported and arranged in the accommodating cavity 693, and both ends of the rotating shaft 62 pass through the top plate 692 and the table shell 691, the first gear 613, the second gear 614 and the synchronous belt 612 are all arranged in the accommodating cavity 693, and the output shaft of the motor 611 passes through the accommodating cavity 693 and is connected to the second gear 614.

[0038] In order to increase the number of glasses 2 that can be tested in this embodiment, the number of the rotating platform 64, the rotating shaft 62, the rotating shaft 62 bearing, the first gear 613, the profiling fixture 66, and the grinding tool 65 is set to be multiple, so that multiple glasses 2 can be tested. The transmission is also realized by a transmission synchronous belt structure, and a tensioning wheel 615 is set to tension the synchronous belt 612. The synchronous belt 612 simultaneously engages with multiple first gears 613, so that the second gear 614 drives the multiple first gears 613 to transmit. The linear bearing 12 is fixed on the top plate 692, and the two ends of the guide column 13 pass through the top plate 692 and the platform shell 691 respectively.

[0039] Reference Figure 6 , Figure 7 and Figure 5 As an example, the first clamping mechanism 3 includes a base body 31 and a first clamping assembly, the base body 31 is arranged on the platform 11, and the first clamping assembly is installed on the base body 31. The first clamping assembly includes a base plate 32 and a claw assembly; the base plate 32 has a first side wall 321, a second side wall 322, a third side wall 323 and a fourth side wall 324, the first side wall 321 and the second side wall 322 are arranged opposite to each other along a first direction, the third side wall 323 and the fourth side wall 324 are arranged opposite to each other along a second direction perpendicular to the first direction, and the second direction is perpendicular to the first direction, and the first side wall 321 of the base plate 32 is fixed on the base body 31.

[0040] The claw assembly includes a first rotating seat 331, a first claw 332, a first locking bolt 338, a first spring 333, a second rotating seat 334, a second claw 335, a second locking bolt 339 and a second spring 336. The first rotating seat 331 and the second rotating seat 334 are arranged opposite to each other in the second direction. The first rotating seat 331 and the second rotating seat 334 are respectively connected to the base plate 32. The first end of the first claw 332 is rotatably connected to the first rotating seat 331. The first spring 333 is arranged between the first claw 332 and the third side wall 323 so that the second end of the first claw 332 can rotate around the first end of the first claw 332 in a direction away from the third side wall 323. The first claw 332 is provided with a first through groove 3322 that runs through its thickness. The first through groove 3322 extends along the length direction of the first claw 332. The first locking bolt 338 is penetrated by the first through groove 3322 and can be threadedly connected to the base plate 32.

[0041] The first end of the second claw 335 is rotatably connected to the second rotating seat 334, and the second spring 336 is arranged between the second claw 335 and the fourth side wall 324, so that the second end of the second claw 335 can rotate around the first end of the second claw 335 in the direction away from the fourth side wall 324. The second claw 335 is provided with a second through groove running through the thickness thereof, and the second through groove extends along the length direction of the second claw 335. The second locking bolt 339 is passed through the second through groove and can be threadedly connected to the base plate 32.

[0042] The second end of the first clamping claw 332 extends out of the substrate 32, and the second end of the first clamping claw 332 is bent toward the third side wall 323 to form a first clamping protrusion 3321. Similarly, the second end of the second clamping protrusion 3351 extends out of the substrate 32, and the second end of the second clamping claw 335 is bent toward the fourth side wall 324 to form a second clamping protrusion 3351. The first clamping protrusion 3321 is suitable for clamping one side of the headband 21 in the width direction with the third side wall 323, and the second clamping protrusion 3351 is suitable for clamping the other side of the headband 21 with the fourth side wall 324.

[0043] The working process of the first clamping mechanism 3 in this embodiment is as follows: rotate the first locking bolt 338 to disengage it from the third side wall 323. At this time, driven by the spring, the second end of the first claw 332 moves in a direction away from the base plate 32. The personnel clamps the upper side edge of the headband 21 in the width direction on the third side wall 323, and rotates the first claw 332 so that the first clamping protrusion 3321 and the third side wall 323 clamp the headband 21. Then, tighten the first rotating bolt so that the first rotating bolt presses down the first claw 332. The headband 21 is stably pressed on the third side wall 323 by the first claw 332. In a similar manner, rotate the second locking bolt 339, clamp the lower edge of the headband 21 between the second clamping protrusion 3351 and the fourth side wall 324, and then tighten the second locking bolt 339 to complete the clamping of the headband 21.

[0044] After the friction test is completed, remove the headband 21 and perform the following operations: rotate the first locking bolt 338 and the second locking bolt 339. Driven by the first spring 333 and the second spring 336, the first claw 332 and the second claw 335 respectively move in the direction away from the base plate 32, and the first clamping protrusion 3321 and the second clamping protrusion 3351 also gradually move away from the base plate 32. Since the first clamping protrusion 3321 and the second clamping protrusion 3351 no longer clamp the headband 21, the headband 21 is also detached from the first clamping mechanism 3.

[0045] It can be seen that, when the headband 21 is removed, the first claw 332 in this embodiment accelerates the speed of removing the headband 21 due to the presence of the first spring 333 and the second spring 336 .

[0046] As an example, in the first direction, the third side wall 323 and the fourth side wall 324 are gradually close, the angle between the third side wall 323 and the first direction is 20-60°, and the angle between the fourth side wall 324 and the first direction is 20-60°; the first direction is from the first side wall 321 to the second side wall 322 of the substrate 32. The third side wall 323 and the fourth side wall 324 are symmetrical about the first straight line, Figure 8The middle dotted line is the first straight line, the length direction of the first straight line is parallel to the first direction, the first straight line passes through the midpoint of the first side wall, and the angle between the third side wall 323 and the first direction is 20°, 45° or 60°. Since the third side wall 323 and the fourth side wall 324 have angles with the first direction respectively, the claw also has an angle with the first direction. The change in angle changes the directions of the headband 21 and the glasses 2 at various positions during friction, so that the friction position changes, thereby being able to test the friction performance of different positions of the headband 21 or the glasses 2.

[0047] The outer surface of the first side wall 321 is a plane, and the outer surface of the second side wall 322 is an arc surface. The second side wall 322 gradually recesses toward the first side wall 321 from its two ends to the center, so that the first clamping protrusion 3321 and the end of the second side wall 322 clamp the headband 21, and the second clamping protrusion 3351 and the end of the second side wall 322 clamp the headband 21. Since the second side wall 322 is an arc surface, the second side wall 322 gradually recesses toward the first side wall 321 from its upper and lower ends to the middle, so that the middle of the second side wall 322 will not contact the headband 21, and the middle of the second side wall 322 is recessed, achieving the effect of avoidance, which is used to reduce the impact of the second side wall 322 on the friction of the product.

[0048] Reference Figure 6 and Figure 7 As an example, in this embodiment, the substrate 32 includes a first sub-plate 325 and a second sub-plate 326, which are both fixed on the first bottom plate 313, and the first sub-plate 325 and the second sub-plate 326 are arranged opposite to each other up and down, the third side surface is arranged on the first sub-plate 325, and the fourth inclined surface is arranged on the second sub-plate 326. The surface of the first sub-plate 325 close to the first bottom plate 313 and the surface of the second sub-plate 326 close to the first bottom plate 313 together constitute a first side wall 321, a first notch 327 is arranged on the first sub-plate 325, and a second notch 328 is arranged on the second sub-plate 326, so that there is a cavity on the opposite sides of the first sub-plate 325 and the second sub-plate 326, and the function of the cavity is the same as that of the arc surface of the second side wall 322.

[0049] As an example, the seat body 31 includes a first locking member 314, a first base 311, a first claw seat 312, a first bottom plate 313 and a first bolt. The first base 311 is fixed on the platform 11. The first claw seat 312 is slidably connected to the first base 311 through a first slide rail 337. A plurality of mutually parallel first adjustment grooves are provided on the first bottom plate 313. A first threaded hole is provided on the first claw seat 312. The first bolt passes through the first adjustment groove and is threadedly connected to the first threaded hole. The first adjustment groove in this embodiment extends in the up-down direction. Due to the existence of the first adjustment groove, the position on the first bottom plate 313 can be adjusted in the up-down direction.

[0050] Reference Figure 6 , the base plate 32 is fixed on the first bottom plate 313. A plurality of first pin holes 3111 are provided on the first slide rail 337 or the first base 311, and the plurality of first pin holes 3111 are arranged at intervals along the sliding direction of the first claw seat 312. The first locking member 314 includes a first locking plate and a first pin rod; the first locking plate is provided on the first claw seat 312, and a first through hole 314 is provided on the first locking plate. When the first locking plate slides to a preset position, the first through hole 314 can be coaxial with any one of the first pin holes 3111. When the first through hole 314 and a first pin hole 3111 are coaxial, the first pin rod is inserted into the coaxial first pin hole 3111 and the first through hole 314.

[0051] In this embodiment, a first pin hole 3111 is provided on the first base 311. When the first claw seat 312 slides to the first position, the first through hole 314 and one of the first pin holes 3111 are aligned and coaxial, and the first pin rod is inserted into the first through hole 314 and the pin hole. When it is not necessary to lock the position of the first claw seat 312, the first pin rod is pulled out of the first through hole 314. When it is necessary to adjust the position of the first claw seat 312, when the first claw seat 312 slides from the first position to the second position, the first through hole 314 and another first pin hole 3111 are aligned and coaxial, and the first pin rod is inserted into the first pin hole 3111 and the first through hole 314.

[0052] In this embodiment, the position adjustment and locking of the first claw seat 312 are achieved through the cooperation between the first locking member 314 and the first pin hole 3111 , and can adapt to headbands 21 of different lengths.

[0053] Reference Fig. 9 As an example, the first clamping mechanism 3 and the second clamping mechanism 4 are arranged on opposite sides of the workstation table 6; the second clamping mechanism 4 includes a second locking member 44, a second base 41, a second claw seat 42 and a second clamping claw, the second base 41 is fixed on the table 69, and the second claw seat 42 is slidably connected to the second base 41 through a second slide rail 43; the second claw seat 42 can approach or move away from the second clamping mechanism 4; the second clamping claw is arranged on the second claw seat 42, and the second clamping claw is used to clamp the mirror frame 22. The second clamping claw includes a second bolt, a second base plate 45 and a cylinder clamping claw 46, a plurality of second adjustment grooves are arranged on the second base plate 45 along the thickness direction thereof, and the plurality of second adjustment grooves are parallel to each other, a second threaded hole is arranged on the second claw seat 42, a second bolt passes through the second adjustment groove and is threadedly connected to the second threaded hole, and the cylinder clamping claw 46 is installed on the second base plate 45.

[0054] The second adjustment slot on the second bottom plate 45 also extends in the up-down direction. The adjustment method of the second bottom plate 45 relative to the second claw seat 42 is the same as the adjustment method of the first bottom plate 313 relative to the first claw seat 312, which will not be described in detail.

[0055] The cylinder clamp 46 is a common clamping device. In this embodiment, the cylinder clamp 46 has two clamps 461. In the prior art, the clamp 461 is generally made of metal. However, in this embodiment, the two clamps 461 are both made of silicone, or a silicone pad is fixed on the metal clamp 461 in the prior art.

[0056] A plurality of second pin holes 4111 are provided on the second slide rail 43 or the second base 41, and the plurality of second pin holes 4111 are arranged at intervals along the sliding direction of the second claw seat 42; the second locking member 44 includes a second locking plate and a second pin rod; the second locking plate is provided on the second claw seat 42, and a second through hole 441 is provided on the second locking plate. When the second locking plate slides to a preset position, the second through hole 441 can be coaxial with any one of the second pin holes 4111. When the second through hole 441 and a second pin hole 4111 are coaxial, the second pin rod passes through the second through hole 441 and is plugged into the second pin hole 4111.

[0057] In this embodiment, a plurality of second pin holes 4111 are provided on the second base 41 , and the position adjustment of the second claw seat 42 relative to the second base 41 is the same as the position adjustment of the first claw seat 312 relative to the first base 311 , and thus will not be described in detail.

[0058] As an example, the grating ruler 7 may or may not be provided on the first base 311, and the grating ruler 7 may or may not be provided on the second base 41, so that the displacement distance on the first claw seat 312 or the second claw seat 42 can be intuitively seen, which is convenient for adjustment.

[0059] The friction testing equipment of the embodiment of the present invention has the following working principle: first, the frame 22 and the headband 21 are connected into a whole (i.e., the glasses 2) through the first connecting part 23 and the second connecting part, and the contour jig 66 is placed on the rotating platform 64, and then fixed through the connecting member 68.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A friction testing device, characterized in that: It includes a mirror frame, a shell, a workstation, a first clamping mechanism, a second clamping mechanism and a lifting mechanism; the shell includes an outer shell and a platform, the outer shell has an inner cavity, the platform is arranged in the inner cavity and connected to the inner wall of the outer shell; The frame has a first connection portion and a second connection portion, wherein the first connection portion is used to connect one end of a headband, and the second connection portion is used to connect the other end of the headband, so that the frame and the headband form glasses; The first clamping mechanism and the second clamping mechanism are arranged on the platform at intervals, the first clamping mechanism is used to clamp the headband, and the second clamping mechanism is used to clamp the frame; The workstation table includes a driving assembly, a mold, a profiling jig and a table. The profiling jig is connected to the table around a preset axis and the driving assembly is used to drive the profiling jig to rotate; the mold is mounted on the outer peripheral surface of the profiling jig, and the glasses are mounted on the outer peripheral surface of the mold; The lifting mechanism is installed on the platform, and the lifting mechanism is used to drive the platform to rise and fall.

2. The friction testing device according to claim 1, characterized in that: The first clamping mechanism comprises a seat body and a first clamping assembly, the seat body is arranged on the platform, and the first clamping assembly is mounted on the seat body; The first clamping assembly includes a base plate and a claw assembly; the base plate has a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall and the second side wall are arranged opposite to each other along a first direction, the third side wall and the fourth side wall are arranged opposite to each other along a second direction perpendicular to the first direction, the first side wall of the base plate is fixed to the base body, the claw assembly includes a first rotating base, a first claw, a first locking bolt, a first spring, a second rotating base, a second claw, a second locking bolt and a second spring, the first rotating base and the second rotating base are arranged opposite to each other along the second direction, the first rotating base and the second rotating base are respectively connected to the base plate, the first end of the first claw is rotatably connected to the first rotating base, the first spring is arranged between the first claw and the third side wall, so that the second end of the first claw can rotate around the first end of the first claw toward a direction away from the third side wall, the first claw is provided with a first through slot running through its thickness, the first through slot extends along the length direction of the first claw, the first locking bolt is penetrated through the first through slot and can be threadedly connected to the base plate; The first end of the second claw is rotatably connected to the second rotating seat, the second spring is arranged between the second claw and the fourth side wall, so that the second end of the second claw can rotate around the first end of the second claw in a direction away from the fourth side wall, the second claw is provided with a second through slot running through the thickness thereof, the second through slot extends along the length direction of the second claw, the second locking bolt is passed through the second through slot and can be threadedly connected to the base plate; The second end of the first claw extends out of the substrate, and the second end of the first claw is bent toward the third side wall to form a first clamping protrusion. The second end of the second latching protrusion extends out of the base plate, and the second end of the second claw is bent toward the fourth side wall to form a second latching protrusion. The first latching protrusion is suitable for clamping one side of the headband in the width direction with the third side wall, and the second latching protrusion is suitable for clamping the other side of the headband with the fourth side wall.

3. The friction testing device according to claim 2, characterized in that: In the first direction, the third side wall and the fourth side wall gradually approach each other, an angle between the third side wall and the first direction is 20-60°, and an angle between the fourth side wall and the first direction is 20-60°.

4. The friction testing device according to claim 3, characterized in that: The third side wall and the fourth side wall are symmetrical about the first straight line, and the angle between the third side wall and the first direction is 20°, 45° or 60°; the length direction of the first straight line is parallel to the first direction.

5. The friction testing device according to claim 4, characterized in that: The surface of the first side wall is a plane, the surface of the second side wall is an arc surface, and the second side wall is gradually recessed toward the first side wall from its two ends to the center, so that the first clamping protrusion and the end of the second side wall clamp the headband, and the second clamping protrusion and the end of the second side wall clamp the headband.

6. The friction testing device according to claim 2, characterized in that: The seat body includes a first locking member, a first base, a first claw seat, a first bottom plate and a first bolt, the first base is fixed to the platform, the first claw seat is slidably connected to the first base via a first slide rail, a plurality of first adjustment grooves parallel to each other are arranged on the first bottom plate, a first threaded hole is arranged on the first claw seat, and the first bolt is passed through the first adjustment groove and threadedly connected to the first threaded hole; The substrate is fixed on the first bottom plate; A plurality of first pin holes are provided on the first slide rail or the first base, and the plurality of first pin holes are arranged at intervals along the sliding direction of the first claw seat; The first locking member includes a first locking plate and a first pin rod; the first locking plate is arranged on the first claw seat, and a first through hole is arranged on the first locking plate. When the first locking plate slides to a preset position, the first through hole can be coaxial with any one of the first pin holes. When the first through hole and one of the first pin holes are coaxial, the first pin rod is inserted into the coaxial first pin hole and the first through hole.

7. The friction testing device according to claim 1, characterized in that The first clamping mechanism and the second clamping mechanism are arranged on opposite sides of the workstation; The second clamping mechanism comprises a second locking member, a second base, a second claw seat and a second clamping claw, the second base is fixed to the table, the second claw seat is slidably connected to the second base via a second slide rail; the second claw seat can approach or move away from the second clamping mechanism; the second clamping claw is arranged on the second claw seat, and the second clamping claw is used to clamp the frame; A plurality of second pin holes are provided on the second slide rail or the second base, and the plurality of second pin holes are arranged at intervals along the sliding direction of the second claw seat; The second locking member includes a second locking plate and a second pin rod; the second locking plate is arranged on the second claw seat, and a second through hole is arranged on the second locking plate. When the second locking plate slides to a preset position, the second through hole can be coaxial with any one of the second pin holes. When the second through hole and one of the second pin holes are coaxial, the second pin rod passes through the second through hole and is plugged into the second pin hole.

8. The friction testing device according to claim 7, characterized in that The second clamping claw includes a second bolt, a second base plate and a cylinder clamping claw. The second base plate is provided with a plurality of second adjustment grooves extending through the thickness direction thereof. The plurality of second adjustment grooves are parallel to each other. A second threaded hole is provided on the second claw seat. The second bolt is passed through the second adjustment groove and is threadedly connected to the second threaded hole. The cylinder clamping claw is installed on the second base plate.

9. The friction testing device according to claim 1, characterized in that: The work station also includes a rotating shaft, a rotating bearing and a rotating platform. A rotating hole is provided on the table plate, the rotating bearing is arranged in the rotating hole, the rotating shaft is rotatably connected to the rotating bearing, the rotating platform is installed at one end of the rotating shaft, the other end of the rotating shaft is connected to the driving assembly, and the profiling jig is arranged on the rotating platform.

10. The friction testing device according to claim 9, characterized in that The profiling fixture comprises a connecting piece, a cylinder and a profiling nose, wherein the profiling nose is in the shape of an elongated strip and is arranged on the outer surface of the cylinder, and the length direction of the profiling nose is parallel to the axis of the cylinder; The rotating platform is provided with a positioning column, the surface of the cylinder close to the rotating platform is provided with a positioning groove, and the positioning column is inserted into the positioning groove; A slot is arranged on the side wall of the cylinder, one end of the connecting piece is inserted into the slot, and the other end of the connecting piece is detachably connected to the rotating platform.

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