Adjustable simply supported beam impact testing machine

Abstract

The utility model provides an adjustable simply supported beam impact testing machine, and relates to the technical field of simply supported beam impact tests. The adjustable simply supported beam impact testing machine comprises a main body frame and a clamping structure, the clamping structure is installed below the main body frame, an upper bar is fixed to the lower end of the main body frame, a lower bar is fixed to the bottom face of the upper bar, the outer surface of the upper bar is slidably sleeved with a sleeve block, and an adjusting structure A capable of adjusting the position of the sleeve block is installed in the upper bar. A vertical frame is installed on the back face of the upper bar. According to the adjustable simply supported beam impact testing machine, by arranging the supporting plate, the extension plate, the sleeve block, the pressure block and the pressure spring, after the supporting shaft is separated from the left end of the supporting plate, the pressure spring pushes the pressure block to rapidly move downwards, the eccentric rotating structure is driven to instantaneously impact a simply supported beam clamped by the clamping structure, the instantaneous impact force of the simply supported beam is increased, and the inclined structure of the supporting plate is changed; the descending height of the pressure block is changed, and the instantaneous impact force of the eccentric rotating structure on the simply supported beam is changed.

Description

Technical Field

[0001] The utility model relates to the technical field of simply supported beam impact testing, in particular to an adjustable simply supported beam impact testing machine. Background Art

[0002] A simply supported beam is a supporting structure in which the supports at both ends only provide vertical constraints but no rotational constraints. A simply supported beam is only constrained by hinged supports at both ends and mainly bears positive bending moments. It is generally a statically determinate structure. System temperature changes, concrete shrinkage creep, tension prestressing, support movement, etc. will not generate additional internal forces in the beam. The force is simple, and the simply supported beam is a simplified mechanical model.

[0003] In order to ensure the quality of simply supported beams, an impact test is required to be performed on the simply supported beams using an impact testing machine before the construction of the simply supported beams. The existing impact test generally only performs a simple eccentric structure rotation to impact the simply supported beams. The impact force is relatively fixed, and since the eccentric rotation is continuous, there is a lack of instantaneous impact force detection, and the test effect is not good. Therefore, an adjustable simply supported beam impact testing machine is proposed. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an adjustable simply supported beam impact testing machine, which solves the problems raised in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: an adjustable simply supported beam impact testing machine, including a main frame and a clamping structure, the clamping structure is installed below the main frame, an upper rod is fixed at the lower end of the main frame, a lower rod is fixed to the bottom surface of the upper rod, a sleeve block is slidably sleeved on the outer surface of the upper rod, an adjustment structure A for adjusting the position of the sleeve block is installed inside the upper rod, a vertical frame is installed on the back of the upper rod, a synchronous block is slidably inserted inside the vertical frame, a support plate is rotatably sleeved on the front end of the synchronous block, the other end of the support plate is rotatably connected to the front face of the sleeve block, and the support plate is remotely The upper surface of one end of the synchronization block is notched, and an extension plate is elastically rotatably connected inside the notch-shaped structure of the support plate. The extension plate is located in front of the lower bar, and the lower end of the extension plate is located below the upper surface of the lower bar. A movable block is slidably inserted into the bottom surface of the lower bar, and an adjustment structure B for adjusting the position of the movable block is installed inside the lower bar. A vertical frame is fixed on the front of the movable block, and a pressure block is slidably inserted inside the vertical frame. A pressure spring is fixed on the upper surface of the pressure block, and the upper end of the pressure spring is fixed to the inner top wall of the vertical frame. A support shaft is rotatably inserted on the back of the pressure block, and an eccentric rotating structure is installed on the front of the pressure block.

[0008] Preferably, the front face of the lower bar is located in front of the front face of the upper bar, the rear end of the support shaft is flush with the back face of the upper bar, and the back face of the pressure block is located in front of the lower bar.

[0009] Preferably, the adjustment structure A includes a motor A and a threaded shaft A, the two ends of the winding rod are rotatably sleeved on the two ends of the threaded shaft A, the sleeve block is threadably sleeved on the outer surface of the threaded shaft A, one end of the threaded shaft A is fixed to the output end of the motor A, and the motor A is fixed to the winding rod.

[0010] Preferably, the adjustment structure B includes a motor B and a threaded shaft B, the two ends of the lower rod are rotatably sleeved on the two ends of the threaded shaft B, one end of the threaded shaft B is fixed to the output end of the motor B, the movable block is threadedly sleeved on the outer surface of the threaded shaft B, and the motor B is fixed to the lower rod.

[0011] Preferably, the eccentric rotating structure includes a motor C, a rotating plate and a counterweight centrifugal block, one end of the rotating plate is fixed to the output end of the motor C, the other end of the rotating plate is fixed to the counterweight centrifugal block, and the rear end of the motor C is fixed to the end of the pressure block located in front of the vertical frame.

[0012] Preferably, the upper surface of the pressure block is a concave structure, and the lower end of the pressure spring is located inside the concave structure of the pressure block.

[0013] Preferably, a threaded rod is fixed on the back of the synchronization block, the rear end of the threaded rod slides through the rear inner wall of the vertical frame, and one end of the threaded rod located at the rear of the vertical frame is threadedly sleeved with a compression nut.

[0014] Preferably, the front and back sides of the vertical frame and the vertical frame are both vertical through-groove structures, and the vertical frame and the vertical frame are arranged in parallel.

[0015] (III) Beneficial effects

[0016] The utility model provides an adjustable simply supported beam impact testing machine, which has the following beneficial effects:

[0017] 1. The adjustable simply supported beam impact testing machine is provided with a support plate, an extension plate, a sleeve block, a pressure block and a pressure spring. When the movable block moves, the pressure block is driven to move through the vertical frame. When the pressure block moves to the left, it drives the support shaft to gradually roll from the upper surface of the extension plate to the upper surface of the support plate. After the support shaft is separated from the left end of the support plate, the pressure spring pushes the pressure block to move downward rapidly, driving the eccentric rotating structure to instantly impact the simply supported beam clamped by the clamping structure, thereby increasing the instantaneous impact force of the simply supported beam. When the adjusting structure A drives the sleeve block to move, it pushes the synchronous block to slide synchronously in the vertical frame, thereby changing the inclined structure of the support plate, changing the height of the pressure block's descent, and changing the instantaneous impact force of the eccentric rotating structure on the simply supported beam.

[0018] 2. The adjustable simply supported beam impact testing machine, by setting a threaded rod and a clamping nut, when the support plate does not need to change its angle, the clamping nut is rotated to engage with the threaded rod and the vertical frame to press, which can assist in fixing the upper end support of the support plate and increase the stability of the support plate supporting the support shaft. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 This is a rear view structural diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the pressure block and the pressure spring of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the movable block and the lower bar of the utility model;

[0023] Figure 5 It is a schematic diagram of the connection between the extension plate and the support plate of the utility model.

[0024] In the figure: 1. main frame; 2. clamping structure; 3. upper bar; 4. sleeve block; 5. adjustment structure A; 51. motor A; 52. threaded shaft A; 6. synchronization block; 7. adjustment structure B; 71. motor B; 72. threaded shaft B; 8. eccentric rotation structure; 81. motor C; 82. rotating plate; 83. counterweight centrifugal block; 9. vertical frame; 10. lower bar; 11. extension plate; 12. support plate; 13. vertical frame; 14. movable block; 15. pressure spring; 16. pressure block; 17. support shaft; 18. threaded rod; 19. clamping nut. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides an adjustable simply supported beam impact testing machine. Figure 1-5As shown, it includes a main frame 1 and a clamping structure 2, the clamping structure 2 is installed below the main frame 1 and fixed to the simply supported beam through the clamping structure 2, an upper rod 3 is fixed to the lower end of the main frame 1, a lower rod 10 is fixed to the bottom surface of the upper rod 3, a sleeve block 4 is slidably sleeved on the outer surface of the upper rod 3, an adjusting structure A5 for adjusting the position of the sleeve block 4 is installed inside the upper rod 3, the adjusting structure A5 includes a motor A51 and a threaded shaft A52, two ends of the upper rod 3 are rotatably sleeved on the two ends of the threaded shaft A52, the sleeve block 4 is threadedly sleeved on the outer surface of the threaded shaft A52, one end of the threaded shaft A52 is fixed to the output end of the motor A51, the motor A51 is fixed to the upper rod 3, the motor A51 drives the threaded shaft A52 to rotate and engage with the sleeve block 4, so as to change the position of the sleeve block 4.

[0027] A vertical frame 9 is installed on the back of the upper rod 3, and a synchronous block 6 is slidably inserted inside the vertical frame 9. The front end of the synchronous block 6 is rotatably sleeved with a support plate 12. When the position of the sleeve block 4 changes, the synchronous block 6 is driven by the support plate 12 to slide in the vertical frame 9, and the inclination angle of the support plate 12 is changed, so that the height of the upper end of the support plate 12 changes. A threaded rod 18 is fixed on the back of the synchronous block 6. The rear end of the threaded rod 18 slides through the rear inner wall of the vertical frame 9. The end of the threaded rod 18 located at the rear of the vertical frame 9 is threadedly sleeved with a clamping nut 19. The clamping nut 19 is rotated to disengage from the vertical frame 9 so that the synchronous block 6 can move. The clamping nut 19 is rotated to press against the vertical frame 9 to fix the synchronous block 6 and fix the angle of the support plate 12. The other end of the support plate 12 is rotatably connected to the front of the sleeve block 4. The upper surface of the end of the support plate 12 away from the synchronous block 6 is notched, and the notched structure of the support plate 12 rotates elastically inside An extension plate 11 is connected so that the extension plate 11 can only rotate upward, and the extension plate 11 elastically connected to the support plate 12 has a tendency to approach the notch of the support plate 12. The extension plate 11 is located in front of the lower rod 10, and the lower end of the extension plate 11 is located below the upper surface of the lower rod 10. A movable block 14 is slidably inserted into the bottom surface of the lower rod 10, and an adjustment structure B7 for adjusting the position of the movable block 14 is installed inside the lower rod 10. The adjustment structure B7 includes a motor B71 and a threaded shaft B72. The two ends of the lower rod 10 are rotatably sleeved on the two ends of the threaded shaft B72, and one end of the threaded shaft B72 is fixed to the output end of the motor B71. The movable block 14 is threadedly sleeved on the outer surface of the threaded shaft B72. The motor B71 is fixed to the lower rod 10. When the motor B71 drives the threaded shaft B72 to rotate, it engages with the movable block 14 to drive the movable block 14 to move left and right.

[0028] A vertical frame 13 is fixed to the front of the movable block 14, and a pressure block 16 is slidably inserted inside the vertical frame 13. The front and back sides of the vertical frame 13 and the vertical frame 9 are both vertically transparent groove structures. The vertical frame 13 is arranged parallel to the vertical frame 9. A pressure spring 15 is fixed to the upper surface of the pressure block 16. The upper end of the pressure spring 15 is fixed to the inner top wall of the vertical frame 13. The upper surface of the pressure block 16 is a concave structure. The lower end of the pressure spring 15 is located inside the concave structure of the pressure block 16. The pressure spring 15 has a tendency to push the pressure block 16 to move downward. When the pressure block 16 moves to the uppermost part of the vertical frame 13, the pressure spring 15 can be retracted into the pressure block 1 6, the back of the pressure block 16 is rotatably plugged with a support shaft 17, the front of the lower bar 10 is located in front of the front of the upper bar 3, the rear end of the support shaft 17 is flush with the back of the upper bar 3, the back of the pressure block 16 is located in front of the lower bar 10, and when the support shaft 17 moves to the left, it first moves to the upper surface of the extension plate 11, and then moves to the upper surface of the support plate 12. After the support shaft 17 is separated from the support plate 12, the pressure spring 15 quickly pushes the pressure block 16 to move downward. When the support shaft 17 moves to the right, the extension plate 11 is pushed to rotate upward, so that the support shaft 17 can move to the right side of the extension plate 11 again.

[0029] An eccentric rotating structure 8 is installed on the front of the pressure block 16. When the pressure block 16 falls downward rapidly, the eccentric rotating structure 8 is driven to quickly impact the simply supported beam. The eccentric rotating structure 8 includes a motor C81, a rotating plate 82 and a counterweight centrifugal block 83. One end of the rotating plate 82 is fixed to the output end of the motor C81, and the other end of the rotating plate 82 is fixed to the counterweight centrifugal block 83. The rear end of the motor C81 is fixed to an end of the pressure block 16 located in front of the vertical frame 13. When the counterweight centrifugal block 83 rotates centrifugally around the motor C81, it continuously impacts the simply supported beam in multiple directions.

[0030] Working principle: The simply supported beam is fixed by the clamping structure 2, and the motor C81 drives the counterweight centrifugal block 83 to rotate centrifugally through the rotating plate 82, which impacts the clamped simply supported beam. When the movable block 14 moves, the pressure block 16 is driven to move through the vertical frame 13. When the pressure block 16 moves to the left, it drives the support shaft 17 to gradually roll from the upper surface of the extension plate 11 to the upper surface of the support plate 12. After the support shaft 17 is separated from the left end of the support plate 12, the pressure spring 15 pushes the pressure block 16 to move downward quickly, driving the eccentric rotating structure 8 to the simply supported beam clamped by the clamping structure 2. The beam is impacted instantaneously, increasing the instantaneous impact force of the simply supported beam. When the adjusting structure A5 drives the sleeve block 4 to move, the synchronous block 6 is pushed to slide synchronously in the vertical frame 9, changing the inclination structure of the support plate 12, changing the height of the pressure block 16 to fall, and changing the instantaneous impact force of the eccentric rotating structure 8 on the simply supported beam. After the pressure block 16 is separated from the support plate 12, the support shaft 17 is driven to contact the lower bar 10 again. After the support shaft 17 moves to the right and contacts the extension plate 11, the extension plate 11 is pushed to rotate upward, so that the support shaft 17 can move to the right side of the extension plate 11 again.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable simply supported beam impact testing machine, comprising a main frame (1) and a clamping structure (2), characterized in that: The clamping structure (2) is installed below the main frame (1); an upper bar (3) is fixed at the lower end of the main frame (1); a lower bar (10) is fixed to the bottom surface of the upper bar (3); a sleeve block (4) is slidably sleeved on the outer surface of the upper bar (3); an adjusting structure A (5) for adjusting the position of the sleeve block (4) is installed inside the upper bar (3); a vertical frame (9) is installed on the back of the upper bar (3); a synchronous block (6) is slidably inserted inside the vertical frame (9); a support plate (12) is rotatably sleeved at the front end of the synchronous block (6); the other end of the support plate (12) is rotatably connected to the front of the sleeve block (4); the upper surface of the end of the support plate (12) away from the synchronous block (6) is notched; the notch-shaped structure of the support plate (12) is elastically rotatably connected to an extension The extension plate (11) is located in front of the lower bar (10), the lower end of the extension plate (11) is located below the upper surface of the lower bar (10), the bottom surface of the lower bar (10) is slidably plugged with a movable block (14), the lower bar (10) is internally installed with an adjustment structure B (7) for adjusting the position of the movable block (14), the front of the movable block (14) is fixed with a vertical frame (13), the interior of the vertical frame (13) is slidably plugged with a pressure block (16), the upper surface of the pressure block (16) is fixed with a pressure spring (15), the upper end of the pressure spring (15) is fixed to the inner top wall of the vertical frame (13), the back of the pressure block (16) is rotatably plugged with a support shaft (17), and the front of the pressure block (16) is installed with an eccentric rotating structure (8).

2. The adjustable simply supported beam impact testing machine according to claim 1, characterized in that: The front of the lower rod (10) is located in front of the front of the upper rod (3), the rear end of the support shaft (17) is flush with the back of the upper rod (3), and the back of the pressure block (16) is located in front of the lower rod (10).

3. The adjustable simply supported beam impact testing machine according to claim 1, characterized in that: The adjusting structure A (5) comprises a motor A (51) and a threaded shaft A (52), the two ends of the winding rod (3) are rotatably sleeved on the two ends of the threaded shaft A (52), the sleeve block (4) is threadedly sleeved on the outer surface of the threaded shaft A (52), one end of the threaded shaft A (52) is fixed to the output end of the motor A (51), and the motor A (51) is fixed to the winding rod (3).

4. The adjustable simply supported beam impact testing machine according to claim 1, characterized in that: The adjusting structure B (7) comprises a motor B (71) and a threaded shaft B (72), the two ends of the lower bar (10) are rotatably sleeved on the two ends of the threaded shaft B (72), one end of the threaded shaft B (72) is fixed to the output end of the motor B (71), the movable block (14) is threadably sleeved on the outer surface of the threaded shaft B (72), and the motor B (71) is fixed to the lower bar (10).

5. The adjustable simply supported beam impact testing machine according to claim 1, characterized in that: The eccentric rotating structure (8) comprises a motor C (81), a rotating plate (82) and a counterweight centrifugal block (83); one end of the rotating plate (82) is fixed to the output end of the motor C (81); the other end of the rotating plate (82) is fixed to the counterweight centrifugal block (83); and the rear end of the motor C (81) is fixed to an end of a pressure block (16) located in front of the vertical frame (13).

6. The adjustable simply supported beam impact testing machine according to claim 1, characterized in that: The upper surface of the pressure block (16) is a concave structure, and the lower end of the pressure spring (15) is located inside the concave structure of the pressure block (16).

7. The adjustable simply supported beam impact testing machine according to claim 1, characterized in that: A threaded rod (18) is fixed on the back of the synchronization block (6), the rear end of the threaded rod (18) slides through the rear inner wall of the vertical frame (9), and a compression nut (19) is threadedly sleeved on one end of the threaded rod (18) located behind the vertical frame (9).

8. The adjustable simply supported beam impact testing machine according to claim 1, characterized in that: The front and back sides of the vertical frame (13) and the vertical frame (9) are both vertical through-groove structures, and the vertical frame (13) and the vertical frame (9) are arranged in parallel.

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