A pendulum impact testing device

Abstract

The present application relates to the field of semi-automatic impact loading test, in particular to a pendulum impact test device. The device comprises a counterforce frame mechanism, wherein one side of the counterforce frame mechanism is provided with an axial pressure applying mechanism, an impact test piece is arranged on the axial pressure applying mechanism, the other side of the corresponding counterforce frame mechanism is provided with a linkage type automatic release electromagnetic attraction mechanism, an axial pressure applying mechanism and a linkage type automatic release electromagnetic attraction mechanism are arranged between the pendulum mechanism, and the pendulum mechanism is connected with the counterforce frame mechanism through a power lifting control mechanism; the pendulum mechanism swings between the axial pressure applying mechanism and the linkage type automatic release electromagnetic attraction mechanism, and both sides of the swing path of the pendulum mechanism are provided with an anti-accidental instability mechanism. The pendulum mechanism realizes multiple impacts on the impact test piece, and can accurately control the impact speed of the pendulum mechanism on the impact test piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of semi-automatic impact loading test, in particular to a pendulum impact test device. BACKGROUND

[0002] In the nearshore area, the coastal building structure system suffers from the serious erosion of a series of complex processes in the tsunami chain disaster, among which the impact effect of tsunami float is particularly prominent. Specifically, the tsunami wave promotes the transformation of ships, containers, vehicles and the like into high-energy floats, and these objects form a dynamic impact force under the driving of the wave, which continuously and violently impacts the coastal structure. The tsunami float poses an undeniable threat to the safety and stability of the coastal area. Therefore, in-depth study of the impact effect of the tsunami float in the tsunami chain disaster and its influence on the destruction mechanism of the structure has important significance for improving the disaster prevention and reduction ability of the coastal area.

[0003] The tsunami float is of various types and shapes, and the quantity is huge. The threat of these floats to the coastal building structure presents the characteristics of complexity and multiplicity, that is, the impact effect is not a single isolated event, but a dynamic process of multiple and continuous impacts. However, the current impact test system for structure design mainly focuses on single and static single impact scene, ignoring the continuity and cumulative effect of the actual float impact, so there is a significant lack of continuity in the test design.

[0004] Therefore, it is urgent to develop a test device that can simulate the process of multiple and continuous impact of floats on structures to make up for the shortcomings of the prior art and improve the continuity and accuracy of the test, and provide a more reliable scientific basis for the safety design and protection of coastal building structures. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned defects existing in the prior art, and a pendulum impact test device is proposed, which realizes multiple impacts of the pendulum mechanism on the impacted test piece and can accurately control the impact speed of the pendulum mechanism on the impacted test piece.

[0006] The technical scheme of the present application is: a pendulum impact test device, comprising a counterforce frame mechanism, wherein one side of the counterforce frame mechanism is provided with a shaft pressure applying mechanism, the impacted test piece is arranged on the shaft pressure applying mechanism, and the other side of the corresponding counterforce frame mechanism is provided with a linkage type automatic release electromagnetic attraction mechanism, a pendulum mechanism is arranged between the shaft pressure applying mechanism and the linkage type automatic release electromagnetic attraction mechanism, and the pendulum mechanism is connected with the counterforce frame mechanism through a power lifting control mechanism.

[0007] The pendulum mechanism swings between the shaft pressure applying mechanism and the linkage type automatic release electromagnetic attraction mechanism, and the two sides of the swing path of the pendulum mechanism are provided with an anti-accidental instability mechanism.

[0008] The counterforce frame mechanism comprises:

[0009] The main base;

[0010] The counterforce frame, the main base is provided with a plurality of rows of counterforce frames, each row of counterforce frames comprises a plurality of counterforce frames arranged in the vertical direction, and the plurality of rows of counterforce frames are symmetrically arranged, the bottom of the counterforce frame is fixedly connected with the main base, and the upper portions of the counterforce frames in the same row are fixedly connected through the cross beams;

[0011] The top cross beam, the two symmetrically arranged cross beams are fixedly connected through the top cross beam, and the pendulum mechanism is connected with the top cross beam through the power lifting mechanism.

[0012] The power lifting mechanism comprises two symmetrically arranged asynchronous motors, and the asynchronous motors are connected to the top cross beam;

[0013] The output shafts of the two asynchronous motors are connected with the inner hexagonal transmission shafts, and the two inner hexagonal transmission shafts are arranged in the inner hexagonal holes at the two ends of the pendulum clamping tooth component.

[0014] The pendulum mechanism comprises:

[0015] The pendulum, which is connected with the power lifting mechanism through the pendulum telescopic rod, is provided with a hammer head at the side surface facing the impacted test piece;

[0016] The pendulum telescopic rod, the top end of which is fixedly connected with the pendulum clamping tooth component, and the bottom end of which is fixedly connected with the pendulum;

[0017] The fixed steel strand, a plurality of fixed steel strands are connected between the pendulum clamping tooth component and the pendulum.

[0018] The axial pressure applying mechanism comprises:

[0019] The hinged beam, the middle portions of the counterforce frames symmetrically arranged at one end of the main base are respectively hinged with the hinged beams, and the plurality of hinged beams are symmetrically arranged;

[0020] The middle cross beam, the bottom surfaces of the hinged beams are fixedly connected through the middle cross beam, and the middle cross beam is symmetrically provided with the weights at the two ends, and the impacted test piece is located between the middle cross beam and the main base;

[0021] The bearing component, the two bearing components are respectively arranged at the ends of the two sides of the middle cross beam, and the bearing components comprise the upper bearing component located above the end of the middle cross beam and the lower bearing component located below the end of the middle cross beam, the upper bearing component and the lower bearing component are fixedly connected through the plurality of threaded steel bars, and the weights are arranged on the lower bearing component.

[0022] The top of the impacted test piece is fixedly provided with the backing plate, the backing plate and the middle cross beam are fixedly connected through the plurality of bolts, and the force transmission pressing block is clamped and fixed between the backing plate and the middle cross beam;

[0023] The bottom of the impact test piece is fixedly connected with a test piece base, and the test piece base is fixedly connected with a main base;

[0024] A lateral beam is arranged below the middle beam and outside the upper end of the impact test piece, and the lateral beam is fixedly connected between the oppositely arranged reverse frames.

[0025] The linkage type automatic release electromagnetic suction mechanism comprises:

[0026] A counterforce steel column is fixed on the main base, and the counterforce steel column is provided with an electromagnetic suction disc on the side facing the impact test piece;

[0027] A suction disc fixing member is fixed with the electromagnetic suction disc, a sensor is arranged on the electromagnetic suction disc, and the electromagnetic suction disc is arranged in linkage with the alternating current asynchronous motor;

[0028] A telescopic rod is fixedly connected between the suction disc fixing member and the counterforce steel column.

[0029] The anti-accidental instability mechanism comprises:

[0030] Fixed groove steels are arranged on both sides of the pendulum swing path, the two fixed groove steels are symmetrically arranged, and the opposite surfaces of the two fixed groove steels are in the form of open grooves;

[0031] A three-axis air cylinder is arranged in the open groove of the fixed groove steel and is connected with the clamping square steel;

[0032] A rotating clamping shaft is rotatably arranged in the open groove of the fixed groove steel, and a rotating plate is fixed on the rotating clamping shaft;

[0033] Clamping square steels are arranged on both sides of the pendulum swing path, the opposite surfaces of the two clamping square steels are in the form of planes, and the other side surface of the corresponding clamping square steel is rotatably connected with the rotating plate.

[0034] A horizontal long slot is arranged on the connecting side surface of the clamping square steel and the rotating plate, a hinge shaft is arranged in the long slot, the end portion of the rotating plate is rotatably connected with the hinge shaft, and the rotating plate is rotatably arranged in the long slot.

[0035] The two fixed groove steels are fixed on a counterforce base, and the counterforce base is fixedly connected with the main base.

[0036] The beneficial effects of the present application are:

[0037] (1) the power lifting mechanism can quickly adjust the lifting speed of the pendulum by changing the size of the access current, at the same time, the power lifting mechanism can realize rapid and efficient multiple impact; by adjusting the length of the telescopic rod and the fixed installation height of the telescopic rod, the angle and height of the electromagnetic chuck are adjusted to adjust and fix the height of the pendulum, so that the pendulum impact member reaches the ideal speed;

[0038] (2) the alternating current asynchronous motor and the electromagnetic chuck are in linkage, when the hammer head contacts with the electromagnetic chuck, the electromagnetic chuck and the alternating current asynchronous motor are powered off in linkage, the suction force acting on the pendulum and the force acting on the hammer head by the alternating current asynchronous motor disappear, the pendulum swings under the action of its own gravity, and the gravitational potential energy is converted into kinetic energy, so that the speed of the pendulum impacting the impacted test piece is controlled;

[0039] (3) in the swinging process, after the pendulum collides with the impacted test piece, the alternating current asynchronous motor and the electromagnetic chuck are powered on in linkage, the alternating current asynchronous motor lifts the pendulum to the specified height again, the alternating current asynchronous motor and the electromagnetic chuck are powered off in linkage, and the alternating current asynchronous motor swings under the action of its own gravity, and the impact on the impacted test piece is completed again, so that the reciprocating impact on the impacted test piece is realized. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is the three-dimensional structure schematic diagram of the present application;

[0041] Figure 2 is the structure schematic diagram of the pendulum mechanism and the power lifting mechanism of the present application;

[0042] Figure 3 is the structure schematic diagram of the shaft pressure applying mechanism of the present application;

[0043] Figure 4 is the structure schematic diagram of the linkage type automatic release electromagnetic chuck mechanism of the present application;

[0044] Figure 5 is the structure schematic diagram of the anti-accident mechanism of the present application;

[0045] Figure 6 is the structure explosion diagram of the anti-accident mechanism of the present application.

[0046] In the diagram: 1-1, reaction frame; 1-2, top crossbeam; 1-3, main base; 2-1, AC asynchronous motor; 2-2, pendulum transmission gear component; 2-3, internal hexagonal drive shaft; 2-4, fixed steel strand; 2-5, pendulum telescopic rod; 2-6, pendulum; 3-1, hinged beam; 3-2, weight; 3-3, load-bearing component; 3-4, impact specimen; 3-5, force transmission block; 3-6, pad; 3-7, threaded steel bar; 3-8 3-9. Load-bearing pad; 3-10. Specimen base; 3-11. Central crossbeam; 3-12. Side crossbeam; 3-13. Support rod; 4-1. Electromagnetic chuck; 4-2. Chuck fixing component; 4-3. Sensor; 4-4. Telescopic rod; 4-5. Reaction steel column; 5-1. Reaction base; 5-2. Clamping square steel; 5-3. Fixing channel steel; 5-4. Three-axis cylinder; 5-5. Rotating plate; 5-6. Rotating clamping shaft; 5-7. Rubber pad. Detailed Implementation

[0047] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0048] Specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0049] like Figure 1 As shown, the present invention provides a pendulum impact testing device, comprising a reaction frame mechanism, a pendulum mechanism, a power lifting control mechanism, an axial pressure application mechanism, a linked automatic release electromagnetic attraction mechanism, and an anti-accidental instability mechanism. The pendulum mechanism, power lifting control mechanism, linked automatic release electromagnetic attraction mechanism, and anti-accidental instability mechanism are all mounted on the reaction frame mechanism. The impact specimen 3-4 is mounted on the axial pressure application mechanism. During the reciprocating swing of the pendulum mechanism, continuous impact is achieved on the impact specimen.

[0050] like Figure 1As shown, the counterforce frame mechanism mainly plays a supporting role, including the counterforce frame 1-1, the top beam 1-2 and the main base 1-3. The main base 1-3 is a quadrilateral plate-shaped and is located at the bottom of the entire device. The counterforce frame 1-1 is arranged in the vertical direction, and the bottom thereof is fixed on the main base 1-3. In this embodiment, two counterforce frames are respectively arranged at the two sides along the length direction of the main base 1-3, and the two counterforce frames are symmetrically arranged. The upper portions of the two counterforce frames on the same side along the length direction of the main base are fixedly connected through a beam, and the two beams are fixedly connected through the top beam 1-2, and the bottom surface of the top beam 1-2 is fixedly connected with the beams. The power lifting mechanism and the pendulum mechanism are arranged on the top beam 1-2.

[0051] One end of the length direction of the main base 1-3 is provided with the shaft pressure applying mechanism, and the other end of the length direction of the main base 1-3 is provided with the linkage type automatic release electromagnetic suction mechanism. The shaft pressure applying mechanism is connected to the middle portions of the two symmetrically arranged counterforce frames at one end of the length direction of the main base. The linkage type automatic release electromagnetic suction mechanism is arranged outside the counterforce frame. The anti-accidental instability mechanism is arranged between the shaft pressure applying mechanism and the linkage type automatic release electromagnetic suction mechanism, and when the pendulum mechanism swings between the shaft pressure applying mechanism and the linkage type automatic release electromagnetic suction mechanism, the anti-accidental instability mechanism is located on the swinging route of the pendulum, thereby protecting the pendulum mechanism.

[0052] The power lifting mechanism is installed on the lower side of the top beam 1-2, and the pendulum mechanism is rotationally connected to the power lifting mechanism, that is, the pendulum mechanism is connected to the top beam 1-2 through the power lifting mechanism.

[0053] As shown, Figure 2 The power lifting mechanism includes two alternating current asynchronous motors 2-1, and the two alternating current asynchronous motors 2-1 are symmetrically arranged. The two alternating current asynchronous motors 2-1 are fixedly connected with the top beam 1-2 above the two alternating current asynchronous motors 2-1 through a fixed plate. In this embodiment, the fixed plate is fixedly connected with the top beam 1-2 through bolts. The output shaft of the alternating current asynchronous motor 2-1 is connected with an inner hexagonal transmission shaft 2-3. The transmission and pendulum clamping member 2-2 is arranged between the two alternating current asynchronous motors 2-1, and the inner hexagonal transmission shafts 2-3 of the two alternating current asynchronous motors are respectively inserted into the transmission and pendulum clamping member 2-2 from the two ends of the transmission and pendulum clamping member 2-2. After the two alternating current asynchronous motors 2-1 are connected with currents, the inner hexagonal transmission shafts 2-3 on the two sides are synchronously rotated, thereby driving the transmission and pendulum clamping member 2-2 to rotate.

[0054] The pendulum mechanism comprises a pendulum 2-6, which is provided with a hammer head on the side facing the shaft pressure applying device. During actual impact, the shape of the hammer head can be adjusted as required. The pendulum 2-6 is connected with the power lifting mechanism through a pendulum telescopic rod 2-5. The bottom end of the pendulum telescopic rod 2-5 is fixedly connected with the pendulum 2-6, and the top end of the pendulum telescopic rod 2-5 is fixedly connected with the transmission pendulum clamping member 2-2 through a bolt. After the power lifting mechanism is connected with current, the pendulum 2-6 is swung to a specified height through the rotation of the transmission pendulum clamping member 2-2. At the same time, since the length of the pendulum telescopic rod 2-5 can be adjusted during the telescopic process, the pendulum 2-6 can be lifted to any height through the reciprocating swing of the pendulum and the joint action of the pendulum telescopic rod 2-5. At the same time, a plurality of fixed steel wires 2-4 are connected between the transmission pendulum clamping member 2-2 and the pendulum 2-6, the pendulum 2-6 is fixed through the fixed steel wires 2-4, and the pendulum is prevented from shaking, so that the impact position on the test piece is changed.

[0055] By changing the size of the current connected with the power lifting mechanism, the reciprocating swing speed of the pendulum 2-6 can be quickly adjusted, so that the hammer head can quickly and efficiently impact the test piece 3-4 multiple times.

[0056] As shown in Figure 3 The shaft pressure applying device comprises hinged beams 3-1, a middle cross beam 3-10, weights 3-2 and a bearing member 3-3. Two symmetrical counterforce frames arranged at one end of the main base in the length direction are respectively hingedly connected with the hinged beams 3-1, and the two hinged beams 3-1 are fixedly connected through the middle cross beam 3-10. In the embodiment, the middle cross beam 3-10 is fixedly connected with the bottom surface of the hinged beam 3-1 through a bolt. The two ends of the middle cross beam 3-10 are respectively provided with the weights 3-2, and the axial load is applied to the impacted test piece 3-4 through the weights 3-2 at the two ends of the middle cross beam 3-10, so that the fixed axial pressure on the impacted test piece 3-4 is maintained. During the swinging of the hinged beam 3-1 around the hinged point with the counterforce frame, the middle cross beam 3-10 is driven to move downward, so as to apply the axial load to the test piece.

[0057] The impacted test piece 3-4 is located between the middle cross beam 3-10 and the main base 1-3. In the embodiment, the top end of the impacted test piece 3-4 is fixedly connected with a backing plate 3-6, and the backing plate 3-6 is fixedly connected with the middle cross beam 3-10 through a plurality of bolts. A force transmission block 3-5 is arranged between the top end of the impacted test piece 3-4 and the middle cross beam 3-10, and the force transmission block 3-5 is fixedly arranged between the impacted test piece 3-4 and the middle cross beam 3-10 through a bolt.

[0058] The main base 1-3 below the impacted test piece 3-4 is fixedly connected with a test piece base 3-9, and the bottom end of the impacted test piece 3-4 is fixedly connected with the test piece base 3-9.

[0059] A lateral beam 3-11 is arranged below the middle beam 3-10 and outside the upper end of the impact test piece 3-4, and is fixedly connected between two opposite frames arranged symmetrically. The lateral beam 3-11 is used to bear the upper transverse impact reaction force of the test piece 3-4.

[0060] The middle beam 3-10 is provided with a bearing member 3-3 at each side end, and the weight 3-2 is placed on the bearing member 3-3. In this embodiment, two bearing members 3-3 are arranged at each side end of the middle beam 3-10, wherein the upper bearing member is fixed on the top surface of the middle beam 3-10 by bolts, and the lower bearing member is arranged below the middle beam 3-10, and the weight 3-2 is arranged on the lower bearing member below the middle beam 3-10. In this embodiment, a support rod 3-12 is fixed on the lower bearing member, the weight 3-2 is sleeved outside the support rod 3-12, and the weight is clamped and fixed on the support rod by a nut. The upper and lower bearing members are fixedly connected by a threaded steel bar 3-7. The threaded steel bar 3-7 is fixedly connected with the upper and lower bearing members by threaded connection.

[0061] In this embodiment, the top surface of the lower bearing member is fixed with a bearing backing plate 3-8 by bolts, and the bottom end of the support rod 3-12 is fixedly connected with the bearing backing plate 3-8 by welding. By adjusting the weight of the weight 3-2, different loads can be applied to the test piece 3-4.

[0062] As shown in Figure 4 The linkage type automatic release electromagnetic suction mechanism includes an electromagnetic suction disc 4-1 and a counterforce steel column 4-5. In this application, the counterforce steel column 4-5 is fixed at one end of the main base along the length direction, and the bottom end of the counterforce steel column 4-5 is fixedly connected with the main base 1-3. The electromagnetic suction disc 4-1 is arranged on the side of the counterforce steel column 4-5 facing the pendulum mechanism.

[0063] The electromagnetic suction disc 4-1 is fixed on the suction disc fixing member 4-2, and the suction disc fixing member 4-2 is connected with the counterforce steel column 4-5 by the upper and lower two telescopic rods 4-4. In this embodiment, the suction disc fixing member 4-2 is in the shape of a rectangular parallelepiped, and the suction disc fixing member 4-2 is arranged obliquely, and the lower surface of the suction disc fixing member 4-2 facing the pendulum mechanism is fixed with the electromagnetic suction disc 4-1. In this embodiment, the electromagnetic suction disc is fixedly connected with the suction disc fixing member by bolts.

[0064] The suction disc fixing member 4-2 is connected with the counterforce steel column 4-5 through the upper and lower telescopic rods respectively towards the two inclined sides of the counterforce steel column, and one end of the upper and lower telescopic rods is hinged with the counterforce steel column, and the other end of the upper and lower telescopic rods is fixedly connected with the suction disc fixing member 4-2. The length of the upper and lower telescopic rods is adjustable, so that the angle and height of the electromagnetic suction disc 4-1 can be adjusted by adjusting the length of the upper and lower telescopic rods and adjusting the installation height of the suction disc fixing member, so as to adjust the height of the brake and fixing pendulum 2-6, so that the pendulum 2-6 impact member 3-4 reaches the ideal speed.

[0065] The electromagnetic suction disc 4-1 obtains magnetic force to magnetically fix the pendulum 2-6 after being powered on. The surface of the electromagnetic suction disc 4-1 is fixed with a sensor 4-3, and when the pendulum 2-6 hits the sensor 4-3 during the swinging process, the electromagnetic suction disc 4-1 is powered off in linkage with the motor 2-1, and the pendulum 2-6 swings downward under the action of its own gravity. The suction force generated by the electromagnetic suction disc 4-1 on the pendulum 2-6 is zero at the moment when the electromagnetic suction disc 4-1 is connected with the pendulum 2-6 by electromagnetic force. That is, the initial speed of the pendulum during the process of hitting the impacted test piece 4 is reset to zero by the electromagnetic suction disc 4-1. When the initial speed of the pendulum hitting the impacted test piece 4 is zero, the gravitational potential energy of the pendulum is converted into kinetic energy after the electromagnetic suction disc 4-1 is powered off, that is, the speed of the pendulum is completely converted by its gravitational potential energy, which is convenient for controlling the impact speed of the pendulum on the impacted test piece.

[0066] As shown in Figure 5 and Figure 6 The anti-accidental instability mechanism includes two symmetrically arranged counterforce bases 5-1, the counterforce bases 5-1 are arranged on both sides of the path of the pendulum reciprocating swing, and the counterforce bases 5-1 are fixed on the main base 1-3. The opposite surfaces of the two counterforce bases 5-1 are respectively provided with clamping parts, and the two clamping parts can jointly clamp and fix the pendulum.

[0067] The clamping part includes a fixed channel section steel 5-3, one side of the fixed channel section steel 5-3 is fixedly connected with the opposite surfaces of the two counterforce bases 5-1, and a clamping square steel 5-2 is arranged in the groove on the other side of the corresponding fixed channel section steel 5-3, and the clamping square steel 5-2 is rotatably arranged in the groove. The two clamping square steels 5-2 are symmetrically arranged, and rubber pads 5-7 are fixed on the opposite surfaces of the two clamping square steels 5-2 to reduce the damage of the pendulum 2-6 to the anti-accidental instability mechanism.

[0068] In this embodiment, the recess of the fixed channel steel 5-3 is fixed with a three-axis air cylinder 5-4. In this embodiment, the three-axis air cylinder 5-4 is fixed in the recess of the fixed channel steel 5-3 by bolts. The extendable end of the three-axis air cylinder 5-4 is fixedly connected with the clamping square steel 5-2 towards the side wall of the recess of the fixed channel steel. At the same time, the clamping square steel 5-2 is also rotatably connected with the rotating plate 5-5 and the rotating shaft 5-6. The rotating shaft 5-6 is fixedly connected with the fixed channel steel 5-3 by bolts. One end of the rotating plate 5-5 is rotatably sleeved on the outside of the rotating shaft 5-6, and the other end of the rotating plate 5-5 is rotatably connected with the clamping square steel 5-2. The side of the clamping square steel 5-2 towards the recess of the fixed channel steel is provided with an elongated slot, and a rotating shaft is fixed in the elongated slot. One end of the rotating plate 5-5 is rotatably sleeved on the outside of the rotating shaft, and the end of the rotating plate 5-5 is slidably arranged in the elongated slot.

[0069] During the operation of the three-axis air cylinder 5-4, the clamping square steel 5-2 will be pushed towards the recess or out of the recess. However, since the clamping square steel 5-2 is connected with the rotating shaft 5-6 through the rotating plate 5-5, the clamping square steel will be limited by the rotating shaft 5-6, so that the clamping square steel can only rotate along the rotating shaft 5-6. Therefore, during the operation of the three-axis air cylinder 5-4, a pushing force or a pulling force is applied to one end of the clamping square steel 5-2, so that the clamping square steel 5-2 rotates around the rotating shaft 5-6. When the clamping square steels 5-2 on both sides act simultaneously, the angles of the clamping square steels 5-2 are inclined, so that the clamping square steels 5-2 on both sides can clamp the pendulum 2-6, preventing the pendulum from being damaged accidentally.

[0070] The three-axis air cylinder 5-4 is connected with an ASP pilot regulating valve and a three-position five-way intermediate exhaust valve, which are used to control the operation stroke and operation speed of the three-axis air cylinder 5-4.

[0071] The test process of the device is as follows. According to the impact speed of the pendulum 2-6 required by the test, the length of the pendulum telescopic rod 2-5 and the height of the electromagnetic chuck 4-1 in the linkage type automatic release electromagnetic chuck mechanism are adjusted. The AC asynchronous motor 2-1 in the power lifting mechanism is powered on, and the pendulum 2-6 is lifted to a predetermined height; by increasing the current, the lifting speed of the pendulum 2-6 is increased.

[0072] When the pendulum 2-6 is lifted to a predetermined height, the pendulum 2-6 touches the sensor 4-3 on the electromagnetic chuck 4-1, the sensor 4-3 controls the linkage automatic release electromagnetic chuck and the power lifting mechanism to be powered off at the same time, the pendulum 2-6 falls and swings, the pendulum 2-6 hits the impacted test piece 3-4 in the swinging process, and a impact is completed. After completing the impact, the AC asynchronous motor 2-1 is powered, and the electromagnetic chuck 4-1 is also powered at the same time. At this time, the AC asynchronous motor 2-1 lifts the pendulum to a predetermined height again, and the impact on the impacted test piece is completed again. Repeat the above working process, that is, the multiple impact test of the impacted test piece can be completed.

[0073] The pendulum impact test device provided by the present application is described in detail above. The principles and implementation modes of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in this paper, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pendulum impact testing device, comprising a reaction frame mechanism, characterized in that, One side of the reaction frame mechanism is equipped with an axial compression application mechanism, and the impacted specimen is placed on the axial compression application mechanism. The other side of the corresponding reaction frame mechanism is equipped with a linkage-type automatic release electromagnetic suction mechanism. A pendulum mechanism is provided between the axial compression application mechanism and the linkage-type automatic release electromagnetic suction mechanism. The pendulum mechanism is connected to the reaction frame mechanism through a power lifting control mechanism. The pendulum mechanism swings between the axial pressure application mechanism and the linkage automatic release electromagnetic attraction mechanism, and anti-accidental instability mechanisms are provided on both sides of its swing path; The reaction frame mechanism includes: Main base; The reaction frame has several rows of reaction frame components on the main base. Each row of reaction frame components includes several reaction frames arranged vertically. The rows of reaction frame components are arranged symmetrically. The bottom of the reaction frame is fixedly connected to the main base, and the upper parts of the reaction frames in the same row are fixedly connected to each other by crossbeams. The top beam is fixedly connected to the two symmetrically arranged beams, and the pendulum mechanism is connected to the top beam through the power lifting control mechanism. The power lifting control mechanism includes two symmetrically arranged AC asynchronous motors, which are connected to the top crossbeam; The output shafts of the two AC asynchronous motors are connected to the internal hexagonal drive shafts, which are respectively installed in the internal hexagonal holes at both ends of the transmission swing gear component; The axial compression application mechanism includes: Hinged beams are located at one end of the main base and are symmetrically arranged in the middle of the reaction frame. Several hinged beams are respectively hinged to each other. The bottom surfaces of the central crossbeam and the hinged beam are fixedly connected by the central crossbeam. Weights are symmetrically placed at both ends of the central crossbeam, and the impact specimen is located between the central crossbeam and the main base. The load-bearing components are provided at the ends of the two sides of the middle crossbeam, including an upper load-bearing component located above the end of the middle crossbeam and a lower load-bearing component located below the end of the middle crossbeam. The upper load-bearing component and the lower load-bearing component are fixedly connected by several threaded steel bars, and the weight is placed on the lower load-bearing component. The linkage-type automatic release electromagnetic suction mechanism includes: The reaction steel column is fixed on the main base, and an electromagnetic chuck is provided on the side of the reaction steel column facing the impact specimen. The suction cup fixing component is used to fix the electromagnetic chuck. The electromagnetic chuck is equipped with a sensor and is linked to the AC asynchronous motor. The telescopic rod and suction cup fixing components are fixedly connected to the reaction steel column via the telescopic rod. Anti-accidental instability mechanisms include: Fixed channel steel is provided on both sides of the pendulum swing path. The fixed channel steel on both sides is symmetrically arranged, and the opposite surfaces of the two fixed channel steels are open slots. The three-axis cylinder is installed in the opening slot of the fixed channel steel and connected to the clamping square steel. The rotating shaft is rotatably set in the opening slot of the fixed channel steel, and a rotating plate is fixed on the rotating shaft; The pendulum swings along two sides of a square steel bar. The opposite sides of the two square steel bars are flat, and the other side of the corresponding square steel bar is rotatably connected to the rotating plate.

2. The pendulum impact testing device according to claim 1, characterized in that, The pendulum mechanism includes: The pendulum is connected to the power lifting control mechanism via a pendulum telescopic rod, and the pendulum has a hammer head on the side facing the impact specimen. The top end of the pendulum telescopic rod is fixedly connected to the pendulum transmission tooth component, and the bottom end is fixedly connected to the pendulum. Several fixed steel strands are connected between the pendulum swing gear component and the pendulum.

3. The pendulum impact testing device according to claim 1, characterized in that, The top of the impact test specimen is fixed with a pad, and the pad is fixed to the middle crossbeam by several bolts. The force transmission block is clamped and fixed between the pad and the middle crossbeam. The bottom of the impact specimen is fixedly connected to the specimen base, and the specimen base is fixedly connected to the main base; A lateral beam is provided below the central beam and on the outer side of the upper end of the impact specimen. The lateral beam is fixedly connected between symmetrically arranged reaction frames.

4. The pendulum impact testing device according to claim 1, characterized in that, The side of the clamping square steel plate that connects to the rotating plate is provided with a horizontal elongated groove. A hinge shaft is provided in the elongated groove. The end of the rotating plate is rotatably connected to the hinge shaft, and the rotating plate is rotatably set in the elongated groove.

5. The pendulum impact testing device according to claim 1, characterized in that, The fixed channel steels on both sides are fixed on the reaction base, and the reaction base is fixedly connected to the main base.

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