Automatic impact test device for railway fastener nylon product

Abstract

The invention relates to an automatic impact test device for railway fastener nylon products, which comprises a horizontally arranged bottom plate and a vertical plate vertically and fixedly arranged on the bottom plate, and one side of the vertical plate is provided with a guide groove along the vertical direction; a guide seat is fixedly arranged at the top of the front side of the vertical plate, a vertically-through guide hole is formed in the guide seat, an impact bar is arranged in the guide hole, a fixed clamping jaw corresponding to the impact bar is fixedly arranged below the guide seat, and a lifting clamping jaw is arranged below the fixed clamping jaw in a lifting mode; a clamping device for fixing a test product is arranged on the bottom plate; a second sensor for detecting the impact bar is fixedly arranged above the clamping device on the front side of the vertical plate; a shaft ring with the diameter larger than that of the impact bar is fixedly arranged on the lower portion of the impact bar, and a first sensor used for detecting the position of the shaft ring is fixedly arranged on the vertical plate. A limiting mechanism capable of supporting the lower end of the impact bar is arranged on the front side of the vertical plate. The automatic impact test device saves manpower, greatly reduces labor intensity, and is high in automation degree and safe to use.

Description

Technical Field

[0001] The invention relates to the technical field of railway fastener detection, and in particular to an automatic impact test device for railway fastener nylon products. Background Art

[0002] Rail fasteners in railway systems are important components that connect rails and sleepers. In addition to their fixing function, they also play a role in buffering and vibration reduction. Insulated gauge blocks, baffle seats and other nylon products are commonly used in rail fasteners. These products are important accessories for rail fasteners. They are widely used and in large demand. The performance requirements of the products are relatively high, requiring high strength and certain toughness. Impact testing is an important testing method. The purpose is to evaluate the impact resistance of materials or products when subjected to impact loads to determine their reliability and safety in real working environments. It can help determine the performance of materials or products when subjected to impact loads and evaluate their safety in accidents, collisions or other unexpected situations. In addition, impact testing is also used to study the response and behavior of different materials when subjected to impact loads, which helps to improve the design and development of materials to improve their impact resistance. By conducting impact tests, manufacturers can evaluate and improve the impact resistance of their products, design more durable and reliable products, and improve product quality and user satisfaction. Manufacturers also use impact tests to test whether products comply with industry standards and specifications to ensure that products meet safety and quality requirements.

[0003] The existing impact device test method is: Person A clamps and fixes the product, Person B lifts the impact rod and stops it on the baffle. When Person A removes the baffle, the impact rod falls freely and impacts the center of the two ridges of the product, completing one impact; then Person B lifts the impact rod again to prepare for the second impact, and each product is impacted 6 times in succession. The existing impact device requires two people to cooperate to complete, which consumes manpower, and more than a hundred impacts need to be repeated every day, which is labor-intensive.

[0004] Therefore, it is necessary to propose an automatic impact test device for railway fastener nylon products that saves manpower and reduces labor intensity. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an automatic impact testing device for railway fastener nylon products which can save manpower and reduce labor intensity.

[0006] To solve the above problems, the technical solution adopted by the present invention is: An automatic impact test device for nylon products of railway fasteners comprises a horizontally arranged bottom plate and a vertically fixed upright plate on the bottom plate, a guide groove is provided on one side of the upright plate in the vertical direction; a guide seat is fixedly arranged on the top of the front side of the upright plate, and a guide hole which passes through the guide seat from top to bottom is provided on the guide seat, an impact rod is provided in the guide hole, a fixed clamp corresponding to the impact rod is fixedly arranged below the guide seat, and a lifting clamp which can be lifted and lowered is provided below the fixed clamp; a clamping device for fixing the test product is provided on the bottom plate, and a second sensor for detecting the impact rod is fixedly arranged above the clamping device on the front side of the upright plate; a shaft ring with a diameter larger than that of the impact rod is fixedly arranged at the lower part of the impact rod, and a first sensor for detecting the position of the shaft ring is fixedly arranged on the upright plate; a limiting mechanism for supporting the lower end of the impact rod is provided on the front side of the upright plate.

[0007] As an embodiment of the present invention, the clamping device includes an adjusting mechanism and a clamping mechanism arranged on the adjusting mechanism, the adjusting mechanism includes a T-shaped fixed block fixedly arranged on a base plate, a second adjusting block and a third adjusting block are provided on the fixed block which can slide along the front-rear direction, a second T-shaped sliding groove corresponding to the outer contour of the fixed block is provided at the bottom of the second adjusting block and the third adjusting block, threaded holes are horizontally provided on the left and right sides of the second adjusting block and the third adjusting block, and second fastening bolts are provided in the threaded holes, a pointer with an arrow pointing downward is provided on the left or right side of the second adjusting block and the third adjusting block, a second scale corresponding to the pointer is fixedly arranged on the base plate along the front-rear direction, and a plurality of clamping mechanisms are provided on the second adjusting block.

[0008] As an embodiment of the present invention, a plurality of first adjustment blocks are provided on the top of the second adjustment block which can slide along the left-right direction, a T-shaped first sliding groove is provided on the top of the second adjustment block along the left-right direction, a T-shaped first sliding block adapted to the first sliding groove is provided at the bottom of the first adjustment block, a threaded hole is vertically provided on the first adjustment block and a first fastening bolt is provided in the threaded hole; the clamping mechanism is fixed on the top of the first adjustment block.

[0009] As an embodiment of the present invention, the clamping mechanism is a quick-action pressing pliers, and the pressing head thereof is used to press the test product placed between the second adjusting block and the third adjusting block.

[0010] As an embodiment of the present invention, the limiting mechanism includes a T-shaped mounting seat fixed on the vertical plate, a mounting groove is horizontally opened at the front end of the mounting seat, the mounting groove is hinged to one end of the limiting block through a rotating shaft, and a third sensor for detecting the limiting block is fixedly provided on the right side of the mounting seat. When the limiting block rotates 180° to the left side of the mounting seat, it can support the lower end of the impact rod located above it.

[0011] As an embodiment of the present invention, a long strip-shaped limiting plate is vertically arranged at the front end of the mounting seat, and a long strip hole is opened on the limiting plate along its length direction. The limiting plate is installed at the front end of the mounting seat by a limiting bolt passing through the long strip hole.

[0012] As an embodiment of the present invention, a sensor bracket is fixedly provided on the upper front side of the vertical plate, and the first sensor is a laser sensor, including a transmitter and a receiver arranged on the sensor bracket, and the transmitter and the receiver are respectively located on the left and right sides of the impact rod, and the distance between the laser line emitted by the transmitter and the axis of the impact rod is larger than the diameter of the impact rod and smaller than the outer diameter of the shaft ring.

[0013] As an embodiment of the present invention, the lifting clamp is installed on a fixed seat and is located on the left side of the impact rod. The fixed seat passes through the guide groove and is connected to the lifting device located on the rear side of the vertical plate; the lifting device adopts a vertically arranged linear module, and the fixed seat is connected to the slider on the linear module through a connecting plate.

[0014] As an implementation mode of the present invention, a first scale is vertically arranged on both sides of the impact rod at the upper front part of the vertical plate; and a foot cup is arranged at the bottom corner of the bottom plate.

[0015] As an embodiment of the present invention, a protective cover is arranged on the outer side of the vertical plate, wherein a main machine cover is arranged on the upper front side of the vertical plate, front protective covers are arranged on both sides of the lower part, double-door cabinet doors are arranged on the front side of the lower part, and a rear protective cover is arranged on the rear side of the vertical plate; the front protective cover and the cabinet door are made of transparent material, and a PLC all-in-one machine, control buttons and emergency stop buttons are arranged on the main machine cover.

[0016] The beneficial effects of adopting the above technical solution are: The automatic impact testing device for railway fastener nylon products provided by the present invention saves manpower and greatly reduces labor intensity. Through simulation verification, the automatic impact testing device can be independently operated by one person and easily complete the testing work.

[0017] During the impact test, the impact point is required to fall on the center of the ridges on both sides of the test product. However, different test products have different sizes and ridge positions, so it is not suitable to use a fixed clamp to fix the product. The present invention adjusts the positions of the second adjustment block and the third adjustment block on the fixed block according to different products, so that the ridges on both sides of the product are located directly below the impact rod, and cooperates with the clamping mechanism to achieve rapid loading and unloading of products. In addition, for different products, the positions that need to be clamped are different. By adjusting the position of the first adjustment block on the second adjustment block, effective clamping of different products can be achieved. By tightening the second fastening bolt, the relative position of the first adjustment block and the second adjustment block can be locked.

[0018] After the impact rod hits the product, a rebound force will be generated, causing a secondary impact on the product. To solve this problem, a second sensor is used to monitor the rebound of the impact rod. When the second sensor receives the rebound information, the lifting claw grabs the impact rod to avoid secondary impact, and then sends the impact rod back to the top. This method can effectively solve the rebound problem.

[0019] The height requirement of the impact rod from the product is H. Different products have different heights. In order to ensure that the impact height meets the requirements, the height of different products is entered into the program, and then the program automatically calculates the height of the impact rod by adding H to the product's height. Before the test, the personnel only need to select the corresponding program, and the lifting claw can lift the impact rod to the required height. When the height of the impact rod is adjusted by the lifting claw, when the first sensor detects the collar, the height of the impact rod from the ground is known through measurement. At this time, it is only necessary to adjust the height of the impact rod up and down according to the required height. The height adjustment is accurate and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a structural schematic diagram from another angle of the present invention.

[0022] Figure 3 yes Figure 2 A partial enlarged schematic diagram in the middle.

[0023] Figure 4 It is another perspective structural schematic diagram of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the adjusting mechanism and the clamping mechanism in the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the adjusting mechanism and the clamping mechanism from another angle in the present invention.

[0026] Figure 7 It is a structural schematic diagram of the limiting mechanism in the present invention.

[0027] Figure 8 It is a schematic structural diagram of the protective cover in the present invention.

[0028] Fig. 9 It is a schematic diagram of the structure of the protective cover from another angle in the present invention.

[0029] Among them: 1 vertical plate, 2 guide groove, 3 guide seat, 4 guide hole, 5 sensor bracket, 6 transmitter, 7 receiver, 8 fixed jaw, 9 lifting jaw, 10 fixed seat, 11 linear module, 1101 connecting plate, 12 second sensor, 13 mounting seat, 1301 mounting groove, 14 third sensor, 15 rotating shaft, 16 limit block, 17 limit plate, 18 long hole, 19 limit bolt, 20 impact rod, 21 shaft ring, 22 first scale, 23 quick press pliers, 2301 Pressure head, 24 first adjusting block, 25 first slider, 26 first fastening bolt, 27 second adjusting block, 2701 first slide, 28 third adjusting block, 29 second slide, 30 second fastening bolt, 31 pointer, 32 second scale, 33 fixing block, 34 bottom plate, 35 foot cup, 36 front protective cover, 37 main machine cover, 38 cabinet door, 39 PLC all-in-one machine, 40 control button, 41 emergency stop button, 42 handle, 43 rear protective cover, 44 laser line, 45 test product. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is clearly and completely described below in conjunction with specific embodiments.

[0031] like Figure 1-Figure 4 The automatic impact test device for nylon products of railway fasteners shown in the figure comprises a horizontally arranged bottom plate 34 and a vertical plate 1 fixedly arranged on the bottom plate 34, a guide groove 2 is provided on one side of the vertical plate 1 along the vertical direction, and in this embodiment, the guide groove 2 is arranged on the left side of the vertical plate 1; a guide seat 3 is fixedly arranged on the top of the front side of the vertical plate 1, and a guide hole 4 is provided on the guide seat 3 that passes through from top to bottom, an impact rod 20 is arranged in the guide hole 4, a fixed clamping claw 8 corresponding to the impact rod 20 is fixedly arranged below the guide seat 3, and a lifting clamping claw 9 is provided below the fixed clamping claw 8 so as to be liftable ; A clamping device for fixing the test product 45 is arranged on the bottom plate 34, and a second sensor 12 for detecting the impact rod 20 is fixedly arranged above the clamping device on the front side of the vertical plate 1; a collar 21 having a diameter larger than that of the impact rod 20 is fixedly arranged at the lower part of the impact rod 20, and a first sensor for detecting the position of the collar 21 is fixedly arranged on the vertical plate 1, and the first sensor emits light horizontally and can only detect the position of the collar 21 but cannot detect the position of the impact rod 20; a limiting mechanism for supporting the lower end of the impact rod 20 is arranged on the front side of the vertical plate 1. The fixed jaw 8 and the lifting jaw 9 are pneumatic jaws, which are connected to the air source through an electromagnetic valve, and the electromagnetic valve and the connecting pipeline are arranged on the rear side of the vertical plate 1. The second sensor 12 and the third sensor 14 are photoelectric sensors. The automatic impact test device for nylon products of railway fasteners saves manpower, greatly reduces labor intensity, has a high degree of automation and is safe to use.

[0032] like Figure 5 and Figure 6 As shown, the clamping device includes an adjusting mechanism and a clamping mechanism arranged on the adjusting mechanism, the adjusting mechanism includes a T-shaped fixed block 33 fixedly arranged on a bottom plate 34, a second adjusting block 27 and a third adjusting block 28 are provided on the fixed block 33 which can slide along the front-back direction, a second T-shaped sliding groove 29 corresponding to the outer contour of the fixed block 33 is provided at the bottom of the second adjusting block 27 and the third adjusting block 28, threaded holes are horizontally provided on the left and right sides of the second adjusting block 27 and the third adjusting block 28, and second fastening bolts 30 are provided in the threaded holes, a pointer 31 with an arrow pointing downward is provided on the left or right side of the second adjusting block 27 and the third adjusting block 28, a second scale 32 corresponding to the pointer 31 is fixedly arranged on the bottom plate 34 along the front-back direction, and a plurality of clamping mechanisms are provided on the second adjusting block 27. During the impact test, the impact point is required to fall on the center of the ridges of the two limbs of the test product. However, different test products have different sizes and ridge positions, so it is not suitable to use a fixed clamp to fix the product. The present invention adjusts the position of the second adjustment block 27 and the third adjustment block 28 on the fixed block 33 according to different products, so that the ridges of the two limbs of the product are located directly below the impact rod 20, and the clamping mechanism can be used to achieve rapid loading and unloading of products. The positions of the second adjustment block 27 and the third adjustment block 28 can be accurately adjusted and recorded by the pointer 31 and the second scale 32. By tightening the second fastening bolt 30, the relative positions of the second adjustment block 27 and the third adjustment block 28 and the fixed block 33 can be locked.

[0033] As a further optimization, the second adjusting block 27 has a plurality of first adjusting blocks 24 that can slide in the left-right direction on the top, a T-shaped first slide groove 2701 is provided on the top of the second adjusting block 27 along the left-right direction, a T-shaped first slider 25 that matches the first slide groove 2701 is provided at the bottom of the first adjusting block 24, a threaded hole is vertically provided on the first adjusting block 24, and a first fastening bolt 26 is provided in the threaded hole; the clamping mechanism is fixed on the top of the first adjusting block 24. For different products, the positions that need to be clamped are different. By adjusting the position of the first adjusting block 24 on the second adjusting block 27, effective clamping of different products can be achieved. By tightening the first fastening bolt 26, the relative position of the first adjusting block 24 and the second adjusting block 27 can be locked.

[0034] In this embodiment, the clamping mechanism is a quick pressing clamp 23, and its pressing head 2301 is used to press the test product 45 placed between the second adjustment block 27 and the third adjustment block 28. This is a conventional technical means in the field and will not be described in detail here.

[0035] like Figure 7As shown, the limiting mechanism includes a T-shaped mounting seat 13 fixed on the vertical plate 1, and the mounting seat 13 is located on the right side of the impact rod 20, including a horizontal plate and a vertical plate, wherein the horizontal plate is fitted and fixedly connected to the front side of the vertical plate 1, and the vertical plate is vertically arranged to the vertical plate 1, and a mounting groove 1301 is horizontally opened at the front end of the vertical plate of the mounting seat 13, and the mounting groove 1301 is hinged with one end of the limiting block 16 through a vertically arranged rotating shaft 15 to realize the horizontal swing of the limiting block 16, and the left and right swing limits are both parallel to the front side of the vertical plate 1, and a third sensor 14 is fixed on the right side of the mounting seat 13 for detecting whether the limiting block 16 is located on the right side of the mounting seat 13, and when the limiting block 16 rotates 180° to the left side of the mounting seat 13, it can support the lower end of the impact rod 20 located above it. The position of the limit block 16 can be detected by the third sensor 14. When the cabinet door 38 is opened, if the third sensor 14 can still detect the limit block 16 after the set time, it means that the limit block 16 is located on the right side of the mounting seat 13, and does not play a protective role in preventing the impact rod 20 from falling, and a voice alarm is issued; when the cabinet door 38 is closed, if the third sensor 14 still cannot detect the limit block 16 after the set time, it means that the limit block 16 is located on the left side of the mounting seat 13, and still plays a protective role in preventing the impact rod 20 from falling, and a voice alarm is issued.

[0036] A long strip-shaped limiting plate 17 is vertically arranged at the front end of the mounting seat 13, and a long strip hole 18 is opened on the limiting plate 17 along its length direction. The limiting plate 17 is installed at the front end of the mounting seat 13 by a limiting bolt 19 passing through the long strip hole 18. The limiting plate 17 is provided to lock the position of the limiting block 16 to prevent the limiting block 16 from rotating freely under vibration, thereby affecting the falling of the impact rod 20 or causing the impact rod 20 to fall accidentally.

[0037] like Figure 3 As shown, a sensor bracket 5 is fixedly provided on the upper front side of the vertical plate 1. The first sensor is a laser sensor, including a transmitter 6 and a receiver 7 arranged on the sensor bracket 5. The transmitter 6 and the receiver 7 are respectively located on the left and right sides of the impact rod 20. The distance between the laser line 44 emitted by the transmitter 6 and the axis of the impact rod 20 is larger than the diameter of the impact rod 20 and smaller than the outer diameter of the collar 21.

[0038] In this embodiment, the lifting claw 9 is installed on the fixed seat 10, located on the left side of the impact rod 20. The fixed seat 10 passes through the guide groove 2 and is connected to the lifting device located on the rear side of the vertical plate 1; the lifting device adopts a vertically arranged linear module 11, and the fixed seat 10 is connected to the slider on the linear module 11 through a connecting plate 1101. The linear module 11 is provided with a distance sensor, which can accurately detect and control the moving distance of its slider.

[0039] The clamping jaw of the fixed clamping jaw 8 faces the front side, and the clamping jaw of the lifting clamping jaw 9 faces the right side. The clamping jaws of the fixed clamping jaw 8 and the clamping jaws of the lifting clamping jaw 9 correspond to the impact rod 20 in the up and down directions.

[0040] A first scale 22 is vertically arranged on both sides of the impact rod 20 on the upper front side of the vertical plate 1, which can be used for reference and record when the height of the impact rod 20 is adjusted by the lifting clamp 9; a foot cup 35 is arranged at the bottom corner of the bottom plate 34, which is used to support the bottom plate 34 and adjust its level.

[0041] like Figure 8 and Fig. 9 As shown, a protective cover is arranged on the outer side of the vertical plate 1, wherein a main machine cover 37 is arranged on the upper front side of the vertical plate 1, front protective covers 36 are arranged on both sides of the lower part, and a double-door cabinet door 38 is arranged on the front side of the lower part, and a handle 42 is arranged on the cabinet door 39, and the cabinet door 38 is closed by magnetic attraction; a rear protective cover 43 is arranged on the rear side of the vertical plate 1; the front protective cover 36 and the cabinet door 38 are made of transparent material, and a PLC all-in-one 39, a control button 40 and an emergency stop button 41 are arranged on the main machine cover 37, and the control button 40 includes a start button, a stop button and a reset button.

[0042] Working process: ① Turn on the power switch and ventilate and power on the equipment; ② Open the cabinet door 38, operate the adjustment mechanism and the clamping mechanism, and install the product to be tested; ③ Select the corresponding program on the PLC integrated machine 39, the lifting jaw 9 raises the impact rod 20 to the set height above the test product 45, and is firmly grasped by the fixed jaw 8, the lifting jaw 9 is lowered to a position not far above the second sensor 12, and the limit plate 17 is manually lifted or swung to rotate the limit block 16 to the right side of the mounting seat 13; ④ Close the cabinet door 38, press the pneumatic button, the fixed clamp 8 is released, and the impact rod 20 falls freely to perform the first impact; the lifting clamp 9 detects the rebound of the impact rod 20 and clamps the impact rod, and rises to the set height. After the fixed clamp 8 is firmly grasped, the lifting clamp 9 is released and the second impact is performed. The impact action is repeated according to the set number of times until the product completes the preset number of impacts; ⑤ After the first product is tested, the lifting jaw 9 lifts the impact rod 20 and fixes it with the fixed jaw 8. The personnel opens the protective cover, manually pushes the baffle, lifts or swings the limit plate 17, and rotates the limit block 16 to the left side of the mounting seat 13 to prevent the impact rod 20 from falling, and then replaces the next product; ⑥ After the test is completed, the impact rod 20 is sent to the bottom by the lifting clamp 9 through the program so that it is in a naturally drooping state, and the power switch is turned off.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic impact test device for nylon products of railway fasteners, characterized by: The utility model comprises a bottom plate (34) arranged horizontally and a vertical plate (1) fixedly arranged vertically on the bottom plate (34); a guide groove (2) is provided on one side of the vertical plate (1); a guide seat (3) is fixedly arranged on the top of the front side of the vertical plate (1); a guide hole (4) extending vertically through the guide seat (3); an impact rod (20) is arranged in the guide hole (4); a fixed clamp (8) corresponding to the impact rod (20) is fixedly arranged below the guide seat (3); a lifting clamp (8) which can be lifted and lowered is provided below the fixed clamp (8). The bottom plate (34) is provided with a clamping device for fixing the test product (45); a second sensor (12) for detecting the impact rod (20) is fixedly provided above the clamping device on the front side of the vertical plate (1); a shaft ring (21) having a diameter greater than that of the impact rod (20) is fixedly provided at the bottom of the impact rod (20); a first sensor for detecting the position of the shaft ring (21) is fixedly provided on the vertical plate (1); and a limit mechanism capable of supporting the lower end of the impact rod (20) is provided on the front side of the vertical plate (1).

2. The automatic impact test device for railway fastener nylon products according to claim 1, characterized in that: The clamping device comprises an adjustment mechanism and a clamping mechanism arranged on the adjustment mechanism, the adjustment mechanism comprises a fixed block (33) fixed on a bottom plate (34), the fixed block (33) is T-shaped, a second adjustment block (27) and a third adjustment block (28) are provided on the fixed block (33) which can slide along the front-back direction, the second adjustment block (27) and the third adjustment block (28) are provided with a T-shaped second slide groove (29) corresponding to the outer contour of the fixed block (33) at the bottom, and the second adjustment block (27) is provided with a threaded hole horizontally on the left side and the right side A second fastening bolt (30) is arranged in the threaded hole; threaded holes are horizontally opened on the left side and the right side of the third adjustment block (28) and the second fastening bolt (30) is arranged in the threaded hole; a pointer (31) with an arrow pointing downward is arranged on the left side or the right side of the second adjustment block (27); a pointer (31) with an arrow pointing downward is arranged on the left side or the right side of the third adjustment block (28); a second scale (32) corresponding to the pointer (31) is fixedly arranged on the bottom plate (34) along the front-back direction; and a plurality of clamping mechanisms are arranged on the second adjustment block (27).

3. The automatic impact test device for railway fastener nylon products according to claim 2, characterized in that: A plurality of first adjustment blocks (24) are provided on the top of the second adjustment block (27) which can slide in the left-right direction. A T-shaped first sliding groove (2701) is provided on the top of the second adjustment block (27) in the left-right direction. A T-shaped first sliding block (25) which is matched with the first sliding groove (2701) is provided on the bottom of the first adjustment block (24). A threaded hole is vertically provided on the first adjustment block (24) and a first fastening bolt (26) is provided in the threaded hole. The clamping mechanism is fixed on the top of the first adjustment block (24).

4. The automatic impact test device for railway fastener nylon products according to claim 3, characterized in that: The clamping mechanism is a quick-action clamp (23), the pressing head (2301) of which is used to press the test product (45) placed between the second adjustment block (27) and the third adjustment block (28).

5. The automatic impact test device for railway fastener nylon products according to claim 1, characterized in that: The limiting mechanism comprises a mounting seat (13) fixed on the vertical plate (1), the mounting seat (13) being T-shaped, a mounting groove (1301) being horizontally opened at the front end of the mounting seat (13), the mounting groove (1301) being hinged to one end of a limiting block (16) via a rotating shaft (15), a third sensor (14) for detecting the limiting block (16) being fixedly arranged on the right side of the mounting seat (13), and when the limiting block (16) is rotated 180° to the left side of the mounting seat (13), the lower end of the impact rod (20) located above the limiting block (16) can be supported.

6. The automatic impact test device for railway fastener nylon products according to claim 5, characterized in that: A long strip-shaped limiting plate (17) is vertically arranged at the front end of the mounting seat (13); a long strip hole (18) is opened on the limiting plate (17) along its length direction; the limiting plate (17) is mounted on the front end of the mounting seat (13) by means of a limiting bolt (19) passing through the long strip hole (18).

7. The automatic impact test device for railway fastener nylon products according to claim 1, characterized in that: A sensor bracket (5) is fixedly provided on the upper front side of the vertical plate (1); the first sensor is a laser sensor, comprising a transmitter (6) and a receiver (7) arranged on the sensor bracket (5); the transmitter (6) and the receiver (7) are respectively located on the left and right sides of the impact rod (20); the distance between the laser line (44) emitted by the transmitter (6) and the axis of the impact rod (20) is greater than the diameter of the impact rod (20) and less than the outer diameter of the shaft ring (21).

8. The automatic impact test device for railway fastener nylon products according to claim 1, characterized in that: The lifting claw (9) is mounted on a fixed seat (10) and is located on the left side of the impact rod (20). The fixed seat (10) passes through the guide groove (2) and is connected to a lifting device located on the rear side of the vertical plate (1). The lifting device adopts a vertically arranged linear module (11). The fixed seat (10) is connected to a slider on the linear module (11) via a connecting plate (1101).

9. An automatic impact test device for railway fastener nylon products according to any one of claims 1 to 8, characterized in that: A first scale (22) is vertically arranged on both sides of the impact rod (20) at the upper front part of the vertical plate (1); and a foot cup (35) is arranged at the bottom corner of the bottom plate (34).

10. The automatic impact test device for railway fastener nylon products according to claim 9, characterized in that: A protective cover is arranged on the outside of the vertical plate (1), wherein a main machine cover (37) is arranged on the upper front side of the vertical plate (1), front protective covers (36) are arranged on both sides of the lower part, a double-door cabinet door (38) is arranged on the front side of the lower part, and a rear protective cover (43) is arranged on the rear side of the vertical plate (1); the front protective cover (36) and the cabinet door (38) are made of transparent material, and a PLC integrated machine (39), a control button (40) and an emergency stop button (41) are arranged on the main machine cover (37).

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