Shakeout wear resistance testing device for helmet goggles mask

Abstract

The utility model provides a shakeout wear resistance testing device for a helmet goggle mask, which belongs to the field of testing devices and comprises a testing box, a support mechanism, a shakeout mechanism, an observation mechanism, a shakeout collecting mechanism, a driving motor, a mounting disc and a feeding mechanism. The chain rotates to drive the sliding sleeve to ascend, the sliding sleeve ascends to drive the feeding hopper to ascend, after the feeding hopper ascends, one end of the feeding hopper cannot ascend through blocking of the blocking rod, and therefore the feeding hopper rotates and drives the limiting rod to move, and after the limiting rod moves in the arc-shaped limiting groove, the rotating angle of the feeding hopper can be limited; after the feeding hopper rotates, quartz sand in the feeding hopper enters the sand falling hopper, and the problems that in the prior art, automatic quartz sand pouring is not easy to achieve, a ladder truck or a ladder needs to be arranged when the quartz sand is poured, and operation is inconvenient can be solved.

Description

Technical Field

[0001] The utility model belongs to the field of testing devices, and particularly relates to a falling sand abrasion resistance testing device for a helmet visor mask. Background Art

[0002] Protective glasses are a kind of light filter that can change the transmitted light intensity and spectrum. The most effective and commonly used method to avoid damage to the eyes caused by radiation light is to wear protective glasses. After the existing goggles are produced and processed, they all need to be subjected to a falling sand test so that the staff can timely understand whether the produced goggles can meet the market demand.

[0003] The authorized publication number "CN218725976U" discloses "a falling sand abrasion resistance testing device for goggles, belonging to the field of quality inspection technology. Aiming at the problem that the existing device is not convenient for the installation and disassembly of goggle samples, the following technical solutions are proposed: including an installation frame, a sand discharging component for storing and guiding sand, and a sand box. The sand box is arranged on the installation frame, and the sand discharging component is arranged on the installation frame and the sand box. It also includes a connecting plate, a motor, a rotating shaft, and a sample rotating disk; a placement opening is arranged on the lateral side of the sand box, and a sand falling opening is arranged at the bottom of the sand box; the connecting plate is arranged on the installation frame, the motor is arranged on the connecting plate, the rotating shaft is arranged on the output shaft of the motor, the rotating shaft penetrates through one side of the sand box and is located inside the sand box, the rotating shaft is rotatably connected with the sand box, and the sample rotating disk is clamped and arranged at one end of the rotating shaft located inside the sand box. The utility model is convenient for the installation and disassembly of the sample lens and is convenient for the recovery of quartz sand".

[0004] The above patent is convenient for the installation and disassembly of the sample lens and is convenient for the recovery of quartz sand. However, it is not easy to achieve automatic dumping of quartz sand in the above patent, and a scissor lift or a ladder needs to be additionally equipped when dumping quartz sand, the operation is not very convenient, and there is a certain danger in improper elevated operation, thus affecting the test rate and test safety. Content of the Utility Model

[0005] The purpose of the utility model is to provide a falling sand abrasion resistance testing device for a helmet visor mask, aiming to solve the problems in the prior art that it is not easy to achieve automatic dumping of quartz sand, and a scissor lift or a ladder needs to be equipped when dumping quartz sand, and the operation is not very convenient and safe.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A falling sand abrasion resistance testing device for a helmet visor mask, comprising:

[0008] A test box;

[0009] A support mechanism, arranged on the top of the test box;

[0010] A sand falling mechanism, arranged on the test box and the support mechanism;

[0011] Observation mechanism, provided on the test chamber;

[0012] Sand falling and collecting mechanism, provided on the test chamber;

[0013] Drive motor, provided on the sand falling and collecting mechanism;

[0014] Mounting disc, fixedly connected to the output end of the drive motor; and

[0015] Feeding mechanism, provided on the support mechanism.

[0016] As a preferred embodiment of the present utility model, the support mechanism includes support columns, cross beams, and cantilevers. There are two support columns, and each support column is detachably connected to the top of the test chamber by bolts. The two support columns are symmetrically arranged. The cross beam is fixedly connected between the two support columns. There are four cantilevers, and the four cantilevers are respectively fixedly connected to the same side ends of the two support columns and are symmetrically arranged.

[0017] As a preferred embodiment of the present utility model, the sand falling mechanism includes a fixed sleeve, a sand falling pipe, and a sand falling funnel. The sand falling pipe is movably inserted into the top of the test chamber, and one end of the sand falling pipe movably penetrates through the test chamber and extends to the inside of the test chamber. There are three fixed sleeves, and the three fixed sleeves are all fixedly connected to one side end of one of the support columns and are all fixedly connected to the sand falling pipe. The sand falling funnel is fixedly connected to the side end of one of the support columns, and one end of the sand falling funnel is movably inserted into the sand falling pipe.

[0018] As a preferred embodiment of the present utility model, the observation mechanism includes an L-shaped transparent observation cover and slots. There are two slots, and the two slots are both opened on the top of the test chamber and are symmetrically arranged. The L-shaped transparent observation cover is movably inserted into the two slots.

[0019] As a preferred embodiment of the present utility model, the sand falling and collecting mechanism includes a quartz sand collecting box, a blanking plate, and an inclined plate. The blanking plate is fixedly connected between the side walls of the test chamber. There are two inclined plates, and the two inclined plates are both fixedly connected between the blanking plate and the side walls of the test chamber and are in an inverted V shape. The quartz sand collecting box is movably inserted into the test chamber.

[0020] As a preferred embodiment of the present utility model, the feeding mechanism includes:

[0021] Feeding component, provided on the four cantilevers; and

[0022] Driving component, provided on two of the cantilevers.

[0023] As a preferred solution of the utility model, the feeding component includes a side plate, a baffle rod, a guide rod, a sliding sleeve, a feeding hopper, a rotating shaft B, an arc-shaped limit groove and a limit rod. The side plates are provided with two, each of which is fixedly connected to the side end of each cantilever, and the two side plates are symmetrically arranged. The baffle rods are provided with two, each of which is fixedly connected to the side end of each side plate, and the two baffle rods are symmetrically arranged. The guide rods are provided with two, each of which is fixedly connected between every two cantilevers. The sliding sleeves are provided with two, and each sliding sleeve The sleeve is a sliding sleeve arranged on each guide rod, and there are two rotating shafts B, each of which is rotatably connected to the side end of each sliding sleeve, and each rotating shaft B rotates through each sliding sleeve and extends to the outside of each sliding sleeve, and the upper hopper is obliquely fixedly connected between the two rotating shafts B, and there are two arc-shaped limit grooves, each of which is opened at the side end of each sliding sleeve, and there are two limit rods, which are respectively fixedly connected to the two side ends of the upper hopper, and the two limit rods are respectively movably inserted in the two arc-shaped limit grooves.

[0024] As a preferred solution of the utility model, the driving component includes a chain, a motor frame, a forward and reverse motor, a rotating shaft seat, a sprocket and a rotating shaft A. There are two rotating shaft seats, each of which is fixedly connected to the side end of each cantilever. There are two rotating shafts A, each of which is rotatably connected to the side end of each rotating shaft seat, and each rotating shaft A rotates through each rotating shaft seat and extends to the outside of each rotating shaft seat. There are two sprockets, each of which is fixedly connected to the circumferential surface of each rotating shaft A. The chain drive is connected to the two sprockets, and the chain is fixedly connected to one of the sliding sleeves. The motor frame is fixedly connected to the side end of one of the cantilevers, the forward and reverse motor is fixedly connected to the top of the motor frame, and the output end of the forward and reverse motor is fixedly connected to the rotating shaft A.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] 1. In this scheme, the output end of the forward and reverse motor rotates to drive the rotating shaft A to rotate, the rotating shaft A drives the sprocket to rotate, the sprocket drives the chain to rotate, the chain drives the sliding sleeve to rise, the rising sliding sleeve drives the upper hopper to rise, and after the upper hopper rises, it is blocked by the blocking rod, so that one end of the upper hopper cannot rise, so that the upper hopper rotates, and after the upper hopper rotates, it drives the limit rod to move, and the limit rod can limit the rotation angle of the upper hopper after moving in the arc-shaped limit groove. After the upper hopper rotates, the quartz sand inside it enters the sand falling funnel.

[0027] 2. In this solution, the sand - falling funnel is set to catch the quartz sand conveyed by the feeding hopper. Through the setting of the sand - falling funnel, the quartz sand can be conveyed into the sand - falling pipe. Through the setting of the sand - falling pipe, the quartz sand can fall, and thus fall on the eye - face protection product to conduct the sand - falling wear - resistance test. The feeding plate and the inclined plate are set to convey the quartz sand, so that the quartz sand can fall on the quartz sand collection box, and the used quartz sand is recycled by the quartz sand collection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0029] Figure 1 is a three - dimensional structure schematic diagram of the present utility model;

[0030] Figure 2 is the present utility model Figure 1 an enlarged view of part A in;

[0031] Figure 3 is the present utility model Figure 1 an enlarged view of part B in;

[0032] Figure 4 is a sectional view of the present utility model;

[0033] Figure 5 is an exploded view of the L - shaped transparent observation cover of the present utility model;

[0034] Figure 6 is a partial sectional view of the test box of the present utility model.

[0035] In the figures: 1. Test box; 2. Quartz sand collection box; 3. L - shaped transparent observation cover; 4. Support column; 5. Fixed sleeve; 6. Sand - falling pipe; 7. Cross beam; 8. Cantilever; 9. Side plate; 10. Stop bar; 11. Guide rod; 12. Sliding sleeve; 13. Feeding hopper; 14. Chain; 15. Motor frame; 16. Reversible motor; 17. Rotating shaft seat; 18. Sprocket; 19. Rotating shaft A; 20. Rotating shaft B; 21. Arc - shaped limiting groove; 22. Limiting rod; 23. Sand - falling funnel; 24. Driving motor; 25. Mounting plate; 26. Feeding plate; 27. Slot; 28. Inclined plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0037] Embodiment 1

[0038] Please refer to Figures 1-6 , the technical solution provided in this embodiment is as follows:

[0039] A sand-falling and wear-resistant test device for the visor of a helmet, which is composed of a test box 1, a support mechanism, a sand-falling mechanism, an observation mechanism, a sand-falling collection mechanism, a driving motor 24, a mounting plate 25, and a feeding mechanism. The driving motor 24 is arranged on the sand-falling collection mechanism, and the feeding mechanism is arranged on the support mechanism.

[0040] In a specific embodiment of the present utility model, the driving motor 24 is fixedly connected to one side end of the blanking plate 26, and the output end of the driving motor 24 rotates through the blanking plate 26 and extends to the outside of the blanking plate 26. The mounting plate 25 is fixedly connected to the output end of the driving motor 24, and the mounting plate 25 is used to fix the eye and face protection product.

[0041] Specifically, the support mechanism is arranged on the top of the test box 1. The support mechanism includes support columns 4, a cross beam 7, and cantilever beams 8. There are two support columns 4, and each support column 4 is detachably connected to the top of the test box 1 by bolts. The two support columns 4 are symmetrically arranged. The cross beam 7 is fixedly connected between the two support columns 4. There are four cantilever beams 8, and the four cantilever beams 8 are respectively fixedly connected to the same side end of the two support columns 4, and the four cantilever beams 8 are symmetrically arranged.

[0042] In a specific embodiment of the present utility model, the support column 4 is used to connect the fixed sleeve 5, the fixed sleeve 5 is used to connect the sand-falling pipe 6, the cross beam 7 is used to connect the two support columns 4, so as to improve the stability of the two support columns 4, and the cantilever beam 8 is used to connect the guide rod 11.

[0043] Specifically, the sand-falling mechanism is arranged on the test box 1 and the support mechanism. The sand-falling mechanism includes a fixed sleeve 5, a sand-falling pipe 6, and a sand-falling funnel 23. The sand-falling pipe 6 is movably inserted into the top of the test box 1, and one end of the sand-falling pipe 6 movably penetrates the test box 1 and extends to the inside of the test box 1. There are three fixed sleeves 5, and the three fixed sleeves 5 are all fixedly connected to one side end of one of the support columns 4, and the three fixed sleeves 5 are all fixedly connected to the sand-falling pipe 6. The sand-falling funnel 23 is fixedly connected to the side end of one of the support columns 4, and one end of the sand-falling funnel 23 is movably inserted into the sand-falling pipe 6.

[0044] In a specific embodiment of the present utility model, the fixing sleeve 5 is provided for fixing the sand dropping pipe 6. The sand dropping funnel 23 is provided for receiving the quartz sand conveyed by the feeding hopper 13. Through the setting of the sand dropping funnel 23, the quartz sand can be conveyed into the sand dropping pipe 6. Through the setting of the sand dropping pipe 6, the quartz sand can fall, and thus fall on the eye protection product, so as to conduct the sand dropping wear resistance test.

[0045] Specifically, the observation mechanism is arranged on the test box 1. The observation mechanism includes an L-shaped transparent observation cover 3 and slots 27. There are two slots 27, and both slots 27 are opened on the top of the test box 1, and the two slots 27 are symmetrically arranged. The L-shaped transparent observation cover 3 is movably inserted into the two slots 27.

[0046] In a specific embodiment of the present utility model, the two slots 27 are provided for connecting the L-shaped transparent observation cover 3. Through the L-shaped transparent observation cover 3 being movably inserted into the two slots 27, the L-shaped transparent observation cover 3 can be detached from the slots 27. Through the setting of the L-shaped transparent observation cover 3, the sand dropping wear resistance test of the eye protection product inside the test box 1 can be observed.

[0047] Specifically, the sand dropping collection mechanism is arranged on the test box 1. The sand dropping collection mechanism includes a quartz sand collection box 2, a blanking plate 26 and an inclined plate 28. The blanking plate 26 is fixedly connected between the side walls of the test box 1. There are two inclined plates 28, and both inclined plates 28 are fixedly connected between the blanking plate 26 and the side walls of the test box 1, and the two inclined plates 28 are in an inverted V shape. The quartz sand collection box 2 is movably inserted on the test box 1.

[0048] In a specific embodiment of the present utility model, the blanking plate 26 and the inclined plate 28 are provided for conveying the quartz sand, so that the quartz sand can fall on the quartz sand collection box 2, and the used quartz sand is recycled through the quartz sand collection box 2.

[0049] Specifically, the feeding component is arranged on four cantilevers 8. The feeding component includes side plates 9, stop bars 10, guide rods 11, sliding sleeves 12, a feeding hopper 13, a rotating shaft B20, arc-shaped limiting grooves 21 and limiting rods 22. There are two side plates 9, and each side plate 9 is fixedly connected to the side end of each cantilever 8. The two side plates 9 are symmetrically arranged. There are two stop bars 10, and each stop bar 10 is fixedly connected to the side end of each side plate 9. The two stop bars 10 are symmetrically arranged. There are two guide rods 11, and each guide rod 11 is fixedly connected between every two cantilevers 8. There are two sliding sleeves 12, and each sliding sleeve 12 is slidably sleeved on each guide rod 11. There are two rotating shafts B20, and each rotating shaft B20 is rotatably connected to the side end of each sliding sleeve 12, and each rotating shaft B20 rotatably penetrates each sliding sleeve 12 and extends to the outside of each sliding sleeve 12. The feeding hopper 13 is obliquely fixedly connected between the two rotating shafts B20. There are two arc-shaped limiting grooves 21, and each arc-shaped limiting groove 21 is opened at the side end of each sliding sleeve 12. There are two limiting rods 22, and the two limiting rods 22 are respectively fixedly connected to both side ends of the feeding hopper 13, and the two limiting rods 22 are respectively movably inserted into the two arc-shaped limiting grooves 21.

[0050] In a specific embodiment of the present utility model, the guide rod 11 is provided for slidably connecting the sliding sleeve 12, the side plate 9 is provided for connecting the stop bar 10, the stop bar 10 is provided for blocking one end of the feeding hopper 13. The feeding hopper 13 can rotate through the two rotating shafts B20. The movement of the sliding sleeve 12 can drive the feeding hopper 13 to rise. When the feeding hopper 13 rises and contacts the two stop bars 10, the feeding hopper 13 rotates while rising. By rotating the feeding hopper 13, the discharge hole of the feeding hopper 13 is inclined, so that the discharge port of the feeding hopper 13 is aligned with the sand dropping funnel 23, and the quartz sand inside the feeding hopper 13 enters the sand dropping funnel 23. By movably inserting the limiting rod 22 into the arc-shaped limiting groove 21, the rotation angle of the feeding hopper 13 can be limited to prevent the rotation angle of the feeding hopper 13 from being too large. The initial installation state of the feeding hopper 13 is inclined, and the position of the discharge port of the feeding hopper 13 will be blocked by the stop bar 10 when rising.

[0051] Specifically, the driving component is arranged on two of the cantilevers 8. The driving component includes a chain 14, a motor bracket 15, a forward and reverse motor 16, a rotating shaft seat 17, a sprocket 18, and a rotating shaft A19. There are two rotating shaft seats 17, and each rotating shaft seat 17 is fixedly connected to the side end of each cantilever 8. There are two rotating shafts A19, and each rotating shaft A19 is rotatably connected to the side end of each rotating shaft seat 17, and each rotating shaft A19 rotatably penetrates each rotating shaft seat 17 and extends to the outside of each rotating shaft seat 17. There are two sprockets 18, and each sprocket 18 is fixedly connected to the circumferential surface of each rotating shaft A19. The chain 14 is drivingly connected to the two sprockets 18, and the chain 14 is fixedly connected to one of the sliding sleeves 12. The motor bracket 15 is fixedly connected to the side end of one of the cantilevers 8, the forward and reverse motor 16 is fixedly connected to the top of the motor bracket 15, and the output end of the forward and reverse motor 16 is fixedly connected to the rotating shaft A19.

[0052] In a specific embodiment of the present utility model, the output end of the forward and reverse motor 16 rotates to drive the rotating shaft A19 to rotate. The rotation of the rotating shaft A19 can cause the sprocket 18 to rotate. The rotation of the sprocket 18 can cause the chain 14 to rotate. The rotation of the chain 14 can drive the sliding sleeve 12 to rise.

[0053] The working principle or working process of the eye surface protection product sand dropping and wear resistance testing device provided by the present utility model is as follows: Fix the eye surface protection product on the mounting plate 25, load quartz sand into the feeding hopper 13, start the driving motor 24, the output end of the driving motor 24 rotates to drive the mounting plate 25 to rotate, start the forward and reverse motor 16, the output end of the forward and reverse motor 16 rotates to drive the rotating shaft A19 to rotate, the rotation of the rotating shaft A19 drives the sprocket 18 to rotate, the rotation of the sprocket 18 drives the chain 14 to rotate, the rotation of the chain 14 drives the sliding sleeve 12 to rise, the rising of the sliding sleeve 12 drives the feeding hopper 13 to rise. After the feeding hopper 13 rises, due to the blocking of the blocking rod 10, one end of the feeding hopper 13 cannot rise, so that the feeding hopper 13 rotates. After the feeding hopper 13 rotates, it drives the limiting rod 22 to move. After the limiting rod 22 moves in the arc-shaped limiting groove 21, it can limit the rotation angle of the feeding hopper 13. After the feeding hopper 13 rotates, the quartz sand inside it enters the sand dropping funnel 23. The quartz sand entering the inside of the sand dropping funnel 23 enters the test chamber 1 through the sand dropping pipe 6. The quartz sand entering the test chamber 1 will fall on the eye surface protection product.

[0054] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Sand-falling wear-resistant test device for the visor of a helmet, characterized in that, Comprising: Testing chamber (1); Bracket mechanism, provided on the top of the testing chamber (1); Sand dropping mechanism, provided on the testing chamber (1) and the bracket mechanism; Observation mechanism, provided on the testing chamber (1); Sand dropping collection mechanism, provided on the testing chamber (1); Drive motor (24), provided on the sand dropping collection mechanism; Mounting disc (25), fixedly connected to the output end of the drive motor (24); And Feeding mechanism, provided on the bracket mechanism.

2. The sand-falling wear-resistant test device for the visor of the helmet according to claim 1, wherein: The bracket mechanism includes support columns (4), cross beam (7), and cantilevers (8). There are two support columns (4), and each support column (4) is detachably connected to the top of the testing chamber (1) by bolts. The two support columns (4) are symmetrically arranged. The cross beam (7) is fixedly connected between the two support columns (4). There are four cantilevers (8), and the four cantilevers (8) are respectively fixedly connected to the same side ends of the two support columns (4), and the four cantilevers (8) are symmetrically arranged.

3. The sand-drop abrasion resistance test device for the visor of a helmet according to claim 2, wherein: The sand dropping mechanism includes a fixed sleeve (5), a sand dropping pipe (6), and a sand dropping funnel (23). The sand dropping pipe (6) is movably inserted into the top of the testing chamber (1), and one end of the sand dropping pipe (6) movably penetrates the testing chamber (1) and extends to the inside of the testing chamber (1). There are three fixed sleeves (5), and the three fixed sleeves (5) are all fixedly connected to one side end of one of the support columns (4), and the three fixed sleeves (5) are all fixedly connected to the sand dropping pipe (6). The sand dropping funnel (23) is fixedly connected to the side end of one of the support columns (4), and one end of the sand dropping funnel (23) is movably inserted into the sand dropping pipe (6).

4. The sand-drop wear resistance test device for the visor of the helmet according to claim 3, characterized in that: The observation mechanism includes an L-shaped transparent observation cover (3) and slots (27). There are two slots (27), and the two slots (27) are both opened on the top of the testing chamber (1), and the two slots (27) are symmetrically arranged. The L-shaped transparent observation cover (3) is movably inserted into the two slots (27).

5. The sand-drop abrasion resistance test device for the visor of the helmet according to claim 4, wherein: The sand dropping collection mechanism includes a quartz sand collection box (2), a blanking plate (26), and an inclined plate (28). The blanking plate (26) is fixedly connected between the side walls of the testing chamber (1). There are two inclined plates (28), and the two inclined plates (28) are both fixedly connected between the blanking plate (26) and the side walls of the testing chamber (1), and the two inclined plates (28) are in an inverted V shape. The quartz sand collection box (2) is movably inserted into the testing chamber (1).

6. The sand drop abrasion resistance test device for the visor of the helmet according to claim 5, characterized in that, The feeding mechanism includes: Feeding component, provided on the four cantilevers (8); and Drive component, provided on two of the cantilevers (8).

7. The sand falling and wear-resistant test device for the visor of the helmet according to claim 6, characterized in that: The feeding component comprises a side plate (9), a baffle rod (10), a guide rod (11), a sliding sleeve (12), a feeding hopper (13), a rotating shaft B (20), an arc-shaped limiting groove (21) and a limiting rod (22); two side plates (9) are provided, each of which is fixedly connected to the side end of each cantilever (8), and the two side plates (9) are symmetrically arranged; two baffle rods (10) are provided, each of which is fixedly connected to the side end of each side plate (9), and the two baffle rods (10) are symmetrically arranged; two guide rods (11) are provided, each of which is fixedly connected between each two cantilevers (8); two sliding sleeves (12) are provided, each of which is slidingly connected to the side end of each cantilever (8); The movable sleeve is arranged on each guide rod (11), two rotating shafts B (20) are arranged, each rotating shaft B (20) is rotatably connected to the side end of each sliding sleeve (12), and each rotating shaft B (20) is rotatably penetrated through each sliding sleeve (12) and extends to the outside of each sliding sleeve (12), the upper hopper (13) is obliquely fixedly connected between the two rotating shafts B (20), two arc-shaped limiting grooves (21) are arranged, each arc-shaped limiting groove (21) is opened at the side end of each sliding sleeve (12), two limiting rods (22) are arranged, the two limiting rods (22) are respectively fixedly connected to the two side ends of the upper hopper (13), and the two limiting rods (22) are respectively movably inserted into the two arc-shaped limiting grooves (21).

8. The sand falling and wear-resistant test device for the visor of the helmet according to claim 7, wherein: The driving component comprises a chain (14), a motor frame (15), a forward and reverse motor (16), a rotating shaft seat (17), a sprocket (18) and a rotating shaft A (19), wherein two rotating shaft seats (17) are provided, each of which is fixedly connected to the side end of each cantilever (8), and two rotating shafts A (19) are provided, each of which is rotatably connected to the side end of each rotating shaft seat (17), and each rotating shaft A (19) rotatably passes through each rotating shaft seat (17) and extends to each rotating shaft seat (17). 7), two sprockets (18) are provided, each of the sprockets (18) is fixedly connected to the circumferential surface of each rotating shaft A (19), the chain (14) is drivingly connected to the two sprockets (18), and the chain (14) is fixedly connected to one of the sliding sleeves (12), the motor frame (15) is fixedly connected to the side end of one of the cantilevers (8), the forward and reverse motor (16) is fixedly connected to the top of the motor frame (15), and the output end of the forward and reverse motor (16) is fixedly connected to the rotating shaft A (19).

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