A drop angle testing machine with a limited drop angle

Abstract

This utility model discloses a drop angle testing machine with a limited drop angle. The drop carrier includes a drop slide and a fixed frame. The fixed frame is disposed on the drop slide, which is slidably mounted on the frame. A release mechanism is movably connected to the drop slide. The fixed frame is provided with a first clamping plate, a second clamping plate, and at least two limiting posts. The first clamping plate and the second clamping plate are spaced apart, and a clamping gap is provided between them. The two limiting posts penetrate the clamping gap longitudinally and are located at the lower part of the clamping gap, and are spaced apart laterally. By dropping together with the test object, the drop posture of the test object can be continuously maintained, so that the test position accurately contacts the impact platform, improving the detection accuracy. The test object is directly inserted into the clamping gap, and the two limiting posts limit the two adjacent sides of the test object, so that the test corner of the test object passes through the test hole and protrudes downward from the drop carrier. The structure is simple and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of drop testing equipment technology, and in particular to a drop angle testing machine that limits the drop angle. Background Technology

[0002] Drop testing machines are used to simulate the drop scenario where electronic products (mobile phones, tablets, laptops) hit the ground at their corners, thereby testing the drop resistance of these products. Traditional drop testing machines hold the electronic product in place with its corner facing down using clamps, and then release the clamps to allow the product to fall freely during testing. This type of drop testing machine cannot limit the movement of the electronic product during its descent. This means that the electronic product is easily affected by factors such as its center of gravity during the fall, causing its posture to change. This results in a deviation between the point of impact and the point to be tested, making it impossible to accurately test the specified drop location. Furthermore, for heavier laptops, the clamps not only require increased clamping force but also complex angle adjustments to adjust the angle of the electronic product, leading to a complex and costly clamp structure. In addition, the electronic product may bounce after the initial drop, potentially causing a secondary drop. The damage from a secondary drop is difficult to distinguish from the damage caused by the primary drop, resulting in low testing accuracy. Therefore, improvements are necessary. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a drop angle tester that limits the drop angle, enabling precise drop testing at a preset grounding position, limiting the drop angle to avoid secondary drop damage caused by rebound, improving testing accuracy, simplifying fixture structure, and reducing costs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a drop angle testing machine with a limited drop angle, comprising a frame, a release mechanism, a lifting drive mechanism, and an impact platform. The release mechanism is slidably mounted on the frame, and the impact platform is fixedly mounted on the lower part of the frame. The lifting drive mechanism is connected to the release mechanism. The frame is also provided with a drop carrier, and the impact platform is located directly below the drop carrier. The drop carrier includes a drop slide and a fixed frame. The fixed frame is disposed on the drop slide, and the drop slide is slidably mounted on the frame. The release mechanism is movably connected to the drop slide.

[0005] The fixing frame is provided with a first clamping plate, a second clamping plate and at least two limiting posts. The first clamping plate and the second clamping plate are spaced apart and a clamping gap is provided between the first clamping plate and the second clamping plate. The two limiting posts pass through the clamping gap in the longitudinal direction and are located at the lower part of the clamping gap. The two limiting posts are spaced apart in the transverse direction. The first clamping plate, the second clamping plate and the two limiting posts form a test opening for the corner of the object to be tested to be passed through.

[0006] In a further technical solution, a tilt adjustment assembly is provided between the fixed frame and the drop slide. The tilt adjustment assembly includes a first adjustment shaft, a second adjustment shaft, and two angle adjustment plates. The two angle adjustment plates are spaced apart on the rear side of the first clamping plate, and the second clamping plate is spaced apart on the front side of the first clamping plate. The first adjustment shaft and the second adjustment shaft are respectively disposed between the two angle adjustment plates. The first adjustment shaft is disposed above the second adjustment shaft. The first adjustment shaft is rotatably connected to the drop slide, and the second adjustment shaft is slidably connected to the drop slide.

[0007] In a further technical solution, a connecting part is provided on the side of the drop slide facing the fixed frame. An upper sliding groove is provided on the upper part of the connecting part in the vertical direction, and a lower sliding groove is provided on the lower part of the connecting part in a downward inclined manner from back to front. The upper sliding groove and the lower sliding groove pass through the connecting part laterally. An adjusting slider is slidably installed in the upper sliding groove. A first adjusting shaft is rotatably installed on the adjusting slider, and a second adjusting shaft is slidably installed on the lower sliding groove.

[0008] In a further technical solution, an adjustment through hole is provided on the upper part of the connecting part. The upper end of the adjustment through hole passes through the upper end face of the connecting part, and the lower end of the adjustment through hole is connected to the upper end of the upper slide groove. An adjustment screw is provided inside the adjustment through hole. An adjustment threaded hole is provided on the upper end face of the adjustment slider. The upper part of the adjustment screw abuts against the upper end of the connecting part, and the lower part of the adjustment screw is threadedly connected to the adjustment threaded hole.

[0009] In a further technical solution, the second adjusting shaft is a single-ended screw. One end of the second adjusting shaft abuts against the outer side of the first angle adjusting plate, and the other end of the second adjusting shaft is threaded with at least one fastening nut, which abuts against the outer side of the second angle adjusting plate.

[0010] In a further technical solution, the limiting post includes male and female screws, a fixing screw, a washer, and a limiting sleeve. The front end of the male and female screws is threadedly connected to the first clamping plate. The fixing screw passes through the washer and the second clamping plate in sequence and is threadedly connected to the rear end of the male and female screws. The limiting sleeve is sleeved on the outside of the male and female screws and located in the clamping gap. The front end of the limiting sleeve abuts against the first clamping plate, and the rear end of the limiting sleeve abuts against the second clamping plate.

[0011] In a further technical solution, the fixing frame is also provided with at least one auxiliary limiting post. The auxiliary limiting post has the same structure as the limiting post and is located at the upper part of the clamping gap and between any one of the limiting posts and the outer edge of the clamping gap.

[0012] In a further technical solution, the frame is vertically equipped with at least two traction guide columns and at least two drop guide columns. The release mechanism is slidably mounted on the two traction guide columns, and the drop slide is equipped with two linear bearings, which slidably mount the drop slide to the two drop guide columns.

[0013] The release mechanism includes a release slide and an electromagnet. The release slide is slidably mounted on two guide columns, and the electromagnet is fixedly mounted on the release slide. The electromagnet and the drop slide are magnetically attracted to each other, and the lifting drive mechanism is connected to the release slide in a transmission manner.

[0014] In a further technical solution, an impact medium plate is fixedly installed on the impact platform, and a buffer is provided at the bottom of the frame. The upper surface of the buffer is higher than the upper surface of the impact medium plate, and the buffer and the drop slide are engaged in abutment.

[0015] In a further technical solution, the lifting drive mechanism includes a lifting drive motor, a lifting synchronous belt, and two lifting synchronous pulleys. The two lifting synchronous pulleys are rotatably mounted on the upper and lower ends of the frame, respectively. The lifting synchronous belt is respectively sleeved on the two lifting synchronous pulleys. The lifting drive motor is connected to any one of the lifting synchronous pulleys. The release slide is fixedly mounted on one side of the lifting synchronous belt.

[0016] The upper part of the frame is equipped with an upper limit switch seat, and the lower part of the frame is equipped with a limit mounting rod. A lower limit switch seat is installed on the limit mounting rod. An inductive switch is fixedly installed on the upper limit switch seat and the lower limit switch seat respectively. The two inductive switches are respectively triggered by the release slide.

[0017] The advantages of this invention compared to existing technologies using the above structure are as follows: The test object is carried by a drop carrier; the lifting drive mechanism drives the release mechanism upwards; the release mechanism moves the drop carrier upwards along with the test object; when it reaches a preset height, the release mechanism releases the drop carrier, which then moves downwards under gravity; the test object moves downwards with the drop carrier until its corner falls onto the impact platform, completing one drop test. By dropping together with the test object, the drop carrier can maintain the test object's falling posture, limit the falling angle, prevent displacement of the test object during the fall, and ensure precise contact between the tested position and the impact platform, thus improving detection accuracy. After the test object impacts the platform, the buffer cushions and dissipates the force of the drop carrier, preventing it from rebounding upwards and causing secondary damage to the test object. This allows for accurate assessment of the damage after the first drop. The test object is directly inserted into the clamping gap, and two limiting posts limit its adjacent sides, ensuring that the test corner passes through the test hole and protrudes downwards from the drop carrier. The structure is simple and low-cost. The drop carrier does not need to clamp and fix the test object; it only needs to be placed and installed, making operation simple. The tilt angle between the clamping gap and the impact platform can be adjusted by the tilt adjustment component, thereby expanding the test angle range and simulating various drop angles. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an exploded view of the drop vehicle of this utility model;

[0021] Figure 3 This is a cross-sectional view of the drop vehicle of this utility model;

[0022] Figure 4 This is a state diagram of the present invention during a drop test.

[0023] In the picture:

[0024] 1. Frame; 11. Guide column; 12. Drop guide column; 13. Buffer; 14. Upper limit switch base; 15. Lower limit switch base; 16. Limit mounting rod; 17. Inductive switch.

[0025] 2. Release mechanism; 21. Release slide; 22. Electromagnet.

[0026] 31 Lifting drive motor, 32 Lifting synchronous belt, 33 Lifting synchronous pulley;

[0027] 4. Impact platform; 41. Impact medium plate;

[0028] 5 Drop vehicle, 51 Drop slide, 511 Connecting part, 512 Upper slide groove, 513 Lower slide groove, 514 Adjusting slider, 515 Adjusting threaded hole, 516 Adjusting through hole, 517 Linear bearing, 52 Fixing frame, 521 First clamping plate, 522 Second clamping plate, 523 Clamping gap, 524 Test through hole, 53 Limiting post, 531 Male and female screws, 532 Fixing screw, 533 Washer, 534 Limiting sleeve, 535 Auxiliary limiting post, 54 Incline adjustment assembly, 541 First adjusting shaft, 542 Second adjusting shaft, 543 Angle adjusting plate, 544 Adjusting screw, 545 Fastening nut. Detailed Implementation

[0029] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0030] A drop angle testing machine with a limited drop angle, such as Figures 1 to 4As shown, the device includes a frame 1, a release mechanism 2, a lifting drive mechanism, and an impact platform 4. The release mechanism 2 is slidably mounted on the frame 1, and the impact platform 4 is fixedly mounted on the lower part of the frame 1. The lifting drive mechanism is connected to the release mechanism 2. The frame 1 is also equipped with a drop carrier 5, and the impact platform 4 is located directly below the drop carrier 5. The drop carrier 5 includes a drop slide 51 and a fixing frame 52. The fixing frame 52 is mounted on the drop slide 51, which is slidably mounted on the frame 1. The release mechanism 2 is movably connected to the drop slide 51. The frame 52 is provided with a first clamping plate 521, a second clamping plate 522 and at least two limiting posts 53. The first clamping plate 521 and the second clamping plate 522 are spaced apart, and a clamping gap 523 is provided between the first clamping plate 521 and the second clamping plate 522. The two limiting posts 53 pass through the clamping gap 523 in the longitudinal direction and are located at the lower part of the clamping gap 523. The two limiting posts 53 are spaced apart in the transverse direction. The first clamping plate 521, the second clamping plate 522 and the two limiting posts 53 are horizontally enclosed to form a test opening 524 for the corner of the object to be tested to be passed through.

[0031] Traditional drop test machines cannot limit the angle of the test object during the drop, allowing it to easily flip and shift during the fall, resulting in a deviation between the predicted and actual impact positions and thus low detection accuracy. Furthermore, traditional clamping structures are complex, costly, and involve complicated clamping procedures. This invention, however, uses a drop carrier 5 to support the test object. A lifting drive mechanism drives a release mechanism 2 to move upwards, which in turn moves the drop carrier 5 upwards. When it reaches a preset height, the release mechanism 2 releases the drop carrier 5, which then moves downwards under gravity. The test object moves downwards along with the drop carrier 5. The test object falls to the corner of the test object onto the impact platform 4, completing a drop test. The drop carrier 5 falls together with the test object, which can continuously maintain the drop posture of the test object, limit the drop angle, and prevent the test object from shifting during the drop, so that the tested position accurately contacts the impact platform 4, improving the detection accuracy. The test object is directly inserted into the clamping gap 523, and the two limiting posts 53 limit the two adjacent sides of the test object respectively, so that the test corner of the test object passes through the test hole 524 and protrudes downward from the drop carrier 5. The structure is simple and the cost is low. The drop carrier 5 does not need to clamp and fix the test object. It only needs to be placed and installed, and the operation is simple.

[0032] Specifically, a tilt adjustment assembly 54 is also provided between the fixed frame 52 and the drop slide 51. The tilt adjustment assembly 54 includes a first adjustment shaft 541, a second adjustment shaft 542, and two angle adjustment plates 543. The two angle adjustment plates 543 are spaced apart on the rear side of the first clamping plate 521, and the second clamping plate 522 is spaced apart on the front side of the first clamping plate 521. The first adjustment shaft 541 and the second adjustment shaft 542 are respectively disposed between the two angle adjustment plates 543. The first adjustment shaft 541 is disposed above the second adjustment shaft 542. The first adjustment shaft 541 is rotatably connected to the drop slide 51, and the second adjustment shaft 542 is slidably connected to the drop slide 51. By sliding the second adjusting shaft 542, the fixing frame 52 rotates around the first adjusting shaft 541, thereby changing the tilt angle between the clamping gap 523 and the impact platform 4, so that the test object falls not only perpendicular to the impact platform 4, expanding the test angle range, simulating multiple drop angles, enriching the test data, and making the test data more complete.

[0033] Specifically, a connecting part 511 is provided on the side of the drop slide 51 facing the fixed frame 52. An upper sliding groove 512 is vertically formed on the upper part of the connecting part 511, and a lower sliding groove 513 is inclined downwards from back to front on the lower part of the connecting part 511. The upper sliding groove 512 and the lower sliding groove 513 respectively pass horizontally through the connecting part 511. An adjusting slider 514 is slidably mounted up and down in the upper sliding groove 512. A first adjusting shaft 541 is rotatably mounted on the adjusting slider 514, and a second adjusting shaft 542 is slidably mounted in the lower sliding groove 513. By moving the adjusting slider 514 up and down, the first adjusting shaft 541 moves up and down while rotating, and simultaneously the second adjusting shaft 542 slides in the lower sliding groove 513. This allows the fixed frame 52 to rotate around its center point, avoiding interference between the first clamping plate 521 and the drop slide 51, improving the angle adjustment range of the fixed frame 52; and also allows the lower sliding groove 513 to be a straight groove, facilitating processing.

[0034] Specifically, the upper part of the connecting part 511 is provided with an adjustment through hole 516. The upper end of the adjustment through hole 516 penetrates the upper end face of the connecting part 511, and the lower end of the adjustment through hole 516 communicates with the upper end of the upper slide groove 512. An adjustment screw 544 is inserted into the adjustment through hole 516. An adjustment threaded hole 515 is provided on the upper end face of the adjustment slider 514. The upper part of the adjustment screw 544 abuts against the upper end of the connecting part 511, and the lower part of the adjustment screw 544 is threadedly connected to the adjustment threaded hole 515. During adjustment, the height of the adjustment slider 514 is adjusted by rotating the adjustment screw 544, thereby adjusting the tilt angle of the fixing bracket 52. The adjustment structure is simple and easy to operate.

[0035] Specifically, the second adjusting shaft 542 is a single-ended screw. One end of the second adjusting shaft 542 abuts against the outer side of the first angle adjusting plate 543, and the other end of the second adjusting shaft 542 is threaded with at least one fastening nut 545, which abuts against the outer side of the second angle adjusting plate 543. After the angle adjustment is completed by adjusting the screw 544, the second adjusting shaft 542 is fixed by tightening the fastening nut 545 to lock the tilt angle of the fixing bracket 52, thus completing the angle locking fixation. The locking structure is simple, effective, and low in cost.

[0036] Specifically, the limiting post 53 includes male and female screws 531, fixing screws 532, washers 533 and limiting sleeves 534. The front end of the male and female screws 531 is threadedly connected to the first clamping plate 521. The fixing screw 532 passes through the washer 533 and the second clamping plate 522 in sequence and is threadedly connected to the rear end of the male and female screws 531. The limiting sleeve 534 is sleeved on the outside of the male and female screws 531 and located in the clamping gap 523. The front end of the limiting sleeve 534 abuts against the first clamping plate 521, and the rear end of the limiting sleeve 534 abuts against the second clamping plate 522. The limiting post 53 not only limits and fixes the test object but also connects the first clamping plate 521 and the second clamping plate 522, thereby simplifying the structure and reducing costs. The limiting sleeve 534 wraps around the male and female screws 531, allowing the arc-shaped side of the limiting sleeve 534 to contact the test object, preventing the sharp edges of the male and female screws 531 from contacting the test object and reducing the impact on the test results. At the same time, depending on the thickness of the test object, the width of the clamping gap 523 can be adjusted by changing the male and female screws 531 and the limiting sleeve 534 of different lengths, thereby adapting to test objects of different thicknesses and improving the test range. The washer 533 prevents the fixing screw 532 from slipping, avoiding loosening of the fixing screw 532 due to impact and vibration, and improving reliability and stability.

[0037] Specifically, the fixing frame 52 is also provided with at least one auxiliary limiting post 535. The auxiliary limiting post 535 has the same structure as the limiting post 53. The auxiliary limiting post 535 is located at the upper part of the clamping gap 523 and between any one of the limiting posts 53 and the outer edge of the clamping gap 523. By setting the auxiliary limiting post 535, the long side of the rectangular object to be tested is further limited, forming a triangular limiting structure with the two limiting posts 53, thereby further improving the fixing firmness of the object to be tested and preventing the object to be tested from shaking when the tilt angle of the fixing frame 52 is small.

[0038] Specifically, the lifting drive mechanism includes a lifting drive motor 31, a lifting synchronous belt 32, and two lifting synchronous pulleys 33. The two lifting synchronous pulleys 33 are rotatably mounted on the upper and lower ends of the frame 1, respectively. The lifting synchronous belt 32 is respectively sleeved on the two lifting synchronous pulleys 33. The lifting drive motor 31 is connected to either of the lifting synchronous pulleys 33. The release slide 21 is fixedly mounted on one side of the lifting synchronous belt 32. The lifting drive motor 31 drives the lifting synchronous pulleys 33 to rotate, thereby driving the lifting synchronous belt 32 to move, which in turn drives the release slide 21 to move up and down. The drive structure is simple, low in cost, and highly reliable.

[0039] The upper part of the frame 1 is provided with an upper limit switch seat 14, and the lower part of the frame 1 is provided with a limit mounting rod 16. A lower limit switch seat 15 is provided on the limit mounting rod 16. An inductive switch 17 is fixedly installed on the upper limit switch seat 14 and the lower limit switch seat 15 respectively. The two inductive switches 17 are respectively triggered and cooperate with the release slide 21. When the release slide 21 moves to the highest point, the release slide 21 triggers the inductive switch 17 on the upper limit switch seat 14, thereby releasing a stop signal to automatically control the lifting drive motor 31 to stop. After the drop test is completed, the lifting drive motor 31 drives the release slide 21 to move downward until the release slide 21 triggers the inductive switch 17 located on the lower limit switch seat 15, thereby releasing a stop signal to automatically control the lifting drive motor 31 to rotate in the opposite direction to achieve automated control.

[0040] Specifically, the frame 1 is vertically provided with at least two traction guide columns 11 and at least two drop guide columns 12. The release mechanism 2 is slidably mounted on the two traction guide columns 11. The drop slide 51 is provided with two linear bearings 517. The drop slide 51 is slidably mounted on the two drop guide columns 12 through the two linear bearings 517. The release mechanism 2 includes a release slide 21 and an electromagnet 22. The release slide 21 is slidably mounted on the two traction guide columns 11. The electromagnet 22 is fixedly mounted on the release slide 21. The electromagnet 22 is magnetically attracted to the drop slide 51. The lifting drive mechanism is connected to the release slide 21 through transmission. The release mechanism 2 and the drop slide 51 are slidably fixed by two guide columns 11 and drop guide columns 12, respectively, thereby improving stability during vertical movement. Friction is reduced by linear bearings 517. Similarly, the release mechanism 2 is connected to the two guide columns 11 by two other linear bearings 517. During testing, the electromagnet 22 is energized, magnetically connecting to the drop slide 51. The lifting drive mechanism then drives the release slide 21 upwards until it triggers the inductive switch 17 on the upper limit switch seat 14. At this point, the lifting drive motor 31 stops, and the electromagnet 22 automatically de-energizes, releasing the drop slide 51. Figure 4As shown, the drop slide 51 is lowered. Upon reset after the test, the lifting drive mechanism drives the release slide 21 downwards until it triggers the induction switch 17 on the lower limit switch base 15. This controls the lifting drive motor 31 to rotate in the opposite direction, while the electromagnet 22 automatically energizes and attracts the drop slide 51, thus achieving automatic reset. The entire process requires no manual operation, improving automation. Of course, manual triggering can also be configured through system settings to meet different testing needs.

[0041] Specifically, the impact platform 4 is fixedly equipped with an impact medium plate 41, and a buffer 13 is provided at the lower part of the frame 1. The upper surface of the buffer 13 is higher than the upper surface of the impact medium plate 41, and the buffer 13 abuts against the drop slide 51. After one impact, the test object is prone to rebound, causing a secondary impact. The damage from the secondary impact is difficult to distinguish from the damage from the primary impact. However, in this invention, when the test object hits the platform 4, the buffer 13 buffers and dissipates the force of the drop carrier 5, preventing the drop carrier 5 from rebounding and moving upward, thereby avoiding the rebound causing secondary drop damage to the test object, so as to accurately judge the damage after the first drop. By replacing the impact medium plate 41 with different materials, different drop ground materials can be simulated, improving the richness of the test data.

[0042] It is important to understand that the terms "front," "back," "left," and "right," etc., indicate directions or positional relationships based on... Figure 1 The orientations or positional relationships shown, with "longitudinal" along the front-back direction and "lateral" along the left-right direction, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0043] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A drop angle testing machine for limiting the drop angle, comprising a frame (1), a release mechanism (2), a lifting drive mechanism, and an impact platform (4), wherein the release mechanism (2) is slidably mounted on the frame (1), the impact platform (4) is fixedly mounted on the lower part of the frame (1), and the lifting drive mechanism is connected to the release mechanism (2) by transmission, characterized in that: The frame (1) is also equipped with a drop carrier (5), and the impact platform (4) is located directly below the drop carrier (5). The drop carrier (5) includes a drop slide (51) and a fixing frame (52). The fixing frame (52) is set on the drop slide (51). The drop slide (51) is slidably mounted on the frame (1). The release mechanism (2) is movably connected to the drop slide (51). The fixing frame (52) is provided with a first clamping plate (521), a second clamping plate (522) and at least two limiting posts (53). The first clamping plate (521) and the second clamping plate (522) are spaced apart, and a clamping gap (523) is provided between the first clamping plate (521) and the second clamping plate (522). The two limiting posts (53) pass through the clamping gap (523) in the longitudinal direction and are located at the lower part of the clamping gap (523). The two limiting posts (53) are spaced apart in the transverse direction. The first clamping plate (521), the second clamping plate (522) and the two limiting posts (53) form a test opening (524) for the corner of the object to be tested to be passed through.

2. A fall angle tester for defining a fall angle according to claim 1, characterized in that: An angle adjustment assembly (54) is also provided between the fixed frame (52) and the drop slide (51). The angle adjustment assembly (54) includes a first adjustment shaft (541), a second adjustment shaft (542), and two angle adjustment plates (543). The two angle adjustment plates (543) are spaced apart on the rear side of the first clamping plate (521), and the second clamping plate (522) is spaced apart on the front side of the first clamping plate (521). The first adjustment shaft (541) and the second adjustment shaft (542) are respectively disposed between the two angle adjustment plates (543). The first adjustment shaft (541) is disposed above the second adjustment shaft (542). The first adjustment shaft (541) is rotatably connected to the drop slide (51), and the second adjustment shaft (542) is slidably connected to the drop slide (51).

3. A fall angle tester for defining a fall angle according to claim 2, characterized in that: The drop slide (51) is provided with a connecting part (511) on the side facing the fixed frame (52). The upper part of the connecting part (511) is provided with an upper sliding groove (512) in the vertical direction, and the lower part of the connecting part (511) is provided with a lower sliding groove (513) that is inclined downward from back to front. The upper sliding groove (512) and the lower sliding groove (513) pass through the connecting part (511) laterally. An adjusting slider (514) is slidably installed in the upper sliding groove (512). The first adjusting shaft (541) is rotatably installed on the adjusting slider (514), and the second adjusting shaft (542) is slidably installed in the lower sliding groove (513).

4. A fall angle tester for defining a fall angle according to claim 3, characterized in that: The upper part of the connecting part (511) is provided with an adjustment through hole (516). The upper end of the adjustment through hole (516) passes through the upper end face of the connecting part (511). The lower end of the adjustment through hole (516) is connected to the upper end of the upper slide groove (512). An adjustment screw (544) is provided inside the adjustment through hole (516). An adjustment threaded hole (515) is provided on the upper end face of the adjustment slider (514). The upper part of the adjustment screw (544) abuts against the upper end of the connecting part (511). The lower part of the adjustment screw (544) is threadedly connected to the adjustment threaded hole (515).

5. A fall angle tester for defining a fall angle according to claim 3, characterized in that: The second adjusting shaft (542) is a single-ended screw. One end of the second adjusting shaft (542) abuts against the outer side of the first angle adjusting plate (543), and the other end of the second adjusting shaft (542) is threaded with at least one fastening nut (545). The fastening nut (545) abuts against the outer side of the second angle adjusting plate (543).

6. A fall angle tester for defining a fall angle according to claim 1, characterized in that: The limiting post (53) includes male and female screws (531), fixing screws (532), washers (533) and limiting sleeves (534). The front end of the male and female screws (531) is threadedly connected to the first clamping plate (521). The fixing screws (532) pass through the washers (533) and the second clamping plate (522) in sequence and are threadedly connected to the rear end of the male and female screws (531). The limiting sleeves (534) are sleeved on the outside of the male and female screws (531) and located in the clamping gap (523). The front end of the limiting sleeves (534) abuts against the first clamping plate (521), and the rear end of the limiting sleeves (534) abuts against the second clamping plate (522).

7. A fall angle tester for defining a fall angle according to claim 6, characterized in that: The fixing frame (52) is also provided with at least one auxiliary limiting post (535). The auxiliary limiting post (535) has the same structure as the limiting post (53). The auxiliary limiting post (535) is located at the upper part of the clamping gap (523) and between any one of the limiting posts (53) and the outer edge of the clamping gap (523).

8. A drop angle testing machine for limiting the drop angle according to any one of claims 1 to 6, characterized in that: The frame (1) is vertically provided with at least two traction guide columns (11) and at least two drop guide columns (12). The release mechanism (2) is slidably mounted on the two traction guide columns (11). The drop slide (51) is provided with two linear bearings (517), and the drop slide (51) is slidably mounted on the two drop guide columns (12) through the two linear bearings (517). The release mechanism (2) includes a release slide (21) and an electromagnet (22). The release slide (21) is slidably mounted on two guide columns (11), and the electromagnet (22) is fixedly mounted on the release slide (21). The electromagnet (22) is magnetically attracted to the drop slide (51), and the lifting drive mechanism is connected to the release slide (21) in a transmission manner.

9. A fall angle tester for defining a fall angle according to claim 8, characterized in that: The impact platform (4) is fixedly installed with an impact medium plate (41), and a buffer (13) is provided at the lower part of the frame (1). The upper surface of the buffer (13) is higher than the upper surface of the impact medium plate (41), and the buffer (13) abuts against the drop slide (51).

10. A fall angle tester for defining a fall angle according to claim 8, characterized in that: The lifting drive mechanism includes a lifting drive motor (31), a lifting synchronous belt (32), and two lifting synchronous pulleys (33). The two lifting synchronous pulleys (33) are rotatably mounted on the upper and lower ends of the frame (1), and the lifting synchronous belt (32) is respectively sleeved on the two lifting synchronous pulleys (33). The lifting drive motor (31) is connected to any one of the lifting synchronous pulleys (33) for transmission. The release slide (21) is fixedly mounted on one side of the lifting synchronous belt (32). The upper part of the frame (1) is provided with an upper limit switch seat (14), and the lower part of the frame (1) is provided with a limit mounting rod (16). The limit mounting rod (16) is provided with a lower limit switch seat (15). The upper limit switch seat (14) and the lower limit switch seat (15) are respectively fixedly installed with a sensor switch (17). The two sensor switches (17) are respectively triggered and cooperate with the release slide (21).

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