CN213812799U

CN213812799U - Drop test machine

Info

Publication number: CN213812799U
Application number: CN202022378312.XU
Authority: CN
Inventors: 曹辞海; 王皓; 陈勃琛; 刘文威; 罗高义; 周敏; 李俊; 李劲; 陆家乐
Original assignee: China Electronic Product Reliability and Environmental Testing Research Institute
Current assignee: China Electronic Product Reliability and Environmental Testing Research Institute
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-07-27
Anticipated expiration: 2030-10-22

Abstract

The application provides a drop test machine. The drop test machine includes: a column; the connecting plate is arranged on the upright post; the release device comprises a release piece, a first turning plate and a second turning plate, the first turning plate and the second turning plate are respectively in rotating connection with the connecting plate, and the release piece can be switched between a first position and a second position under the action of external force; when the release piece is positioned at the first position, the first turnover plate and the second turnover plate jointly lean against the release piece to form a supporting surface; when the release piece is switched from the first position to the second position, the first turning plate and the second turning plate lose bearing and turn over, and the supporting surface is opened; and a first limiting part with a preset length is arranged on the connecting plate, and the first limiting part is positioned between the first turning plate and the second turning plate and used for limiting the release piece when the release piece is positioned at the first position. Above-mentioned drop test machine can adjust the contained angle that first board and second turned over the board and form, and then adjusts the sample and place the gesture initially to satisfy the falling gesture requirement of complicated shape sample.

Description

Drop test machine

Technical Field

The utility model relates to a drop test equipment technical field especially relates to a drop test machine.

Background

The free drop test is a test item specified by the standards of national standard GB2423.8 basic environmental test regulations for electrical and electronic products, GB4857.5 vertical impact drop test for transport packages, international standard ISO2248 vertical impact drop test for package-full transport packages and the like, and aims to evaluate the adaptability of products to drop impact environments in the process of transportation and circulation and provide improved suggestions and bases for the package design of the products. The implementation of the above standards is earnestly significant for improving the quality of electrical and electronic products, and has been regarded and widely implemented in mechanical environment tests of a large number of electrical and electronic products such as televisions, electrostatic copiers, microcomputers, electric fans, and the like at home and abroad.

Free drop testers, as a main tool and means for performing package drop tests, have been developed from an initial manual test mode to a mechanized test with a higher degree of automation through the development history of the last two decades.

However, conventional free fall testers are limited to a low height and are mostly large packages falling. However, with the advent of new and harsh application environments, free fall testing is no longer limited to package falls, and new standards and business requirements have arisen. These standard test conditions require a large drop height and the samples are also moving towards smaller volumes and more complex shapes. Due to the particularity of samples and falling conditions (such as the requirement of initial falling postures), most of the tests can only use the most original manual test mode, and the test precision is low.

SUMMERY OF THE UTILITY MODEL

Therefore, an improved drop test machine is needed to be provided aiming at the problems that the traditional free drop machine is difficult to meet the requirement of adjusting the initial drop posture of a sample with a complex shape and a small volume and the test precision is low.

A drop tester, comprising:

a column;

the connecting plate is arranged on the upright post;

the release device comprises a release piece, a first turning plate and a second turning plate, the first turning plate and the second turning plate are respectively in rotating connection with the connecting plate, and the release piece can be switched between a first position and a second position under the action of external force;

when the release piece is located at the first position, the release piece is located between the first turning plate and the second turning plate, and one side of the first turning plate close to the release piece and one side of the second turning plate close to the release piece jointly bear against the release piece to form a supporting surface; when the release piece is switched from the first position to the second position, the first turning plate and the second turning plate lose bearing and turn over, and the supporting surface is opened; and the number of the first and second electrodes,

the connecting plate is provided with a first limiting part with a preset length, and the first limiting part is located between the first turning plate and the second turning plate and used for limiting the release piece when the release piece is located at the first position.

According to the drop test machine, the placement and the drop of the sample are controlled by controlling the formation and the opening of the supporting surface, so that the lateral interference of the external environment to the sample at the moment of releasing the sample can be reduced, the sample is prevented from deviating from the preset drop direction when falling, and the drop test precision is improved; meanwhile, after the first limiting part with the preset length is arranged, the included angle formed by the first turning plate and the second turning plate can be adjusted by adjusting the position of the release piece in the first limiting part, so that the initial posture of the sample falling is favorably adjusted, and the falling posture requirement of the sample with the complex shape is met.

In one embodiment, the releasing device further comprises a first connecting shaft and a second connecting shaft, one end of each of which is connected with the connecting plate; a first bearing is sleeved on the first connecting shaft, the outer ring of the first bearing is connected with the first turning plate, a second bearing is sleeved on the second connecting shaft, and the outer ring of the second bearing is connected with the second turning plate; when the release piece is switched from the first position to the second position, the first turning plate turns around the first connecting shaft, and the second turning plate turns around the second connecting shaft.

In one embodiment, the connecting plate is further provided with a second limiting part and a third limiting part, the first connecting shaft is arranged on the second limiting part, and the second connecting shaft is arranged on the third limiting part; the second limiting part is used for limiting the first connecting shaft corresponding to the position of the release piece in the first limiting part when the release piece is located at the first position; the third limiting part is used for limiting the second connecting shaft corresponding to the position of the release piece in the first limiting part when the release piece is located at the first position.

In one embodiment, the second limiting part and the third limiting part comprise strip-shaped through holes; or the second limiting part and the third limiting part comprise a plurality of circular through holes distributed at intervals.

In one embodiment, the connecting device further comprises a first stop mechanism and a second stop mechanism, wherein the first stop mechanism is connected with the first connecting shaft or the connecting plate, and the second stop mechanism is connected with the second connecting shaft or the connecting plate; when the release piece is located at the second position, the first stop mechanism blocks the first turning plate from turning, and the second stop mechanism blocks the second turning plate from turning.

In one embodiment, the first and second stop mechanisms comprise resilient elements.

In one embodiment, the connection plate is configured to be slidably connected to the column, and the drop testing machine further includes a lifting device, the lifting device including: a motor; and the winch is connected with the power output end of the motor and used for rotating under the driving of the motor, a twisted rope is wound on the winch, and one end, far away from the winch, of the twisted rope is connected with the connecting plate.

In one embodiment, the ground surface impact device further comprises: the steel flat plate is arranged on the ground and corresponds to the supporting surface; and the steel ladle edge concrete plate is arranged in the angle iron frame, and the steel ladle edge concrete plate is arranged on the steel flat plate in a stacking manner.

In one embodiment, the wind deflector comprises a plurality of wind deflectors which are arranged around the ground impact device.

In one embodiment, the release member includes a metal latch that is switched between the first position and the second position by suction and release of an electromagnetic chuck.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a front view of a connecting plate, a release device, and an acceleration device according to an embodiment of the present application;

FIG. 3 is a rear view of the connecting plate, release device and accelerator device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a wind deflector and a ground surface impact device according to an embodiment of the present application.

The symbols of the respective elements in the drawings are as follows:

100. a drop test machine;

10. upright posts 11, triangular sections 12 and guide rails;

20. the connecting plate 21, the first limiting part 22, the second limiting part 23, the third limiting part 24 and the sliding block;

30. the release device comprises a release device 31, a first turning plate 311, a first connecting shaft 312, a first bearing 32, a second turning plate 321, a second connecting shaft 322, a second bearing 33, a release piece 34 and a release piece mounting plate;

40. the device comprises an accelerating device 41, a first tension spring 42, a second tension spring 43, a first mounting plate 44 and a second mounting plate;

50. a lifting device;

60. the device comprises a ground punching device, a steel flat plate 61, a steel edge concrete slab 62, a steel edge concrete slab 63 and an angle iron frame;

70. wind shield, 80, steel platform, 90, control electronic box.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," "circumferential," and the like are based on the orientation or positional relationship shown in the drawings and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The existing drop test machines are mainly divided into two types, namely a hook type and a swing arm type. The working principle of the hook type falling machine is that a test sample is hung on a lifting hook with an electromagnetic release device through an additional wrap angle, a winch is driven to rise to a set height through a sling, then the sample is released and falls down together with the wrap angle, and the free falling in the specified direction is completed. The working principle of the swing arm type falling machine is that a swing arm bearing a test sample is replaced to a certain given height by a hoisting system, and then the swing arm is released by a release device under the action of moment of force to quickly swing back, so that the sample is separated from a bearing surface on the swing arm along the normal direction of a contact surface, and the test sample begins to fall freely in an unconstrained state due to loss of support. The moment of removal of the support and thereafter the test specimen is not disturbed by any mechanical forces, so that the specimen, upon collision with the impact surface, is allowed to remain in the given state before release.

On the one hand, however, the hook fall machine can achieve free fall accurately, but the requirement of specifying the falling direction is often not met. Since at the moment the release mechanism releases the sample, there is inevitably a lateral disturbance that would disrupt the preset given direction. On the other hand, if the swing arm of the swing arm type falling machine has poor rigidity or the sample has overlarge weight, the deformation of the swing arm can be larger when the sample is placed on the bearing surface, and after the sample is removed from the support, the bearing surface of the swing arm can be subjected to inertial lag due to resilience in the process of restoring the deformation of the swing arm, so that the sample falling can be easily interfered.

In view of the above-mentioned drawbacks, please refer to fig. 1 to 3, which provide a drop test machine 100 capable of meeting the drop test precision requirement of a sample with a small volume and a complex shape. The drop test machine 100 includes a column 10, a connecting plate 20, a release device 30, and an acceleration device 40.

The column 10 may be made of a lightweight metal (e.g., aluminum) to enhance its structural strength, while ensuring its light weight and ease of handling. In addition, the upright post 10 has a certain height, such as 2m, 3m, 4m or 5m, so that the falling height of the sample can be adjusted, and the falling height requirement of the sample can be met.

The connecting plate 20 is provided on the column 10 and serves to connect the release device 30 and the acceleration device 40. Preferably, the connecting plate 20 is slidably connected to the upright 10, so that the releasing device 30, the accelerating device 40 and the sample can be driven to slide relative to the upright 10 at the same time, thereby achieving the drop height adjustment of the sample. For example, the guide rail 12 may be disposed on the upright 10, the slider 24 adapted to the guide rail 12 may be disposed on one side of the connecting plate 20 close to the upright 10, and the slider 24 may be driven by an external force to move along the guide rail 12, so as to move the connecting plate 20.

The release device 30 is used to control the placement and dropping of the sample. Specifically, the release device 20 comprises a release member 33, a first turning plate 31 and a second turning plate 32, the first turning plate 31 and the second turning plate 32 are respectively connected with the connecting plate 20 in a rotating manner, and the release member 33 can be switched between a first position and a second position under the action of external force; when the release member is located at the first position, the release member is located between the first flap 31 and the second flap 32, and one edge of the first flap 31 close to the release member 33 and one edge of the second flap 32 close to the release member 33 jointly bear against the release member 33 to form a supporting surface for supporting the sample and determining the initial height of the sample; when the release member 33 is switched from the first position to the second position, the first flap 31 and the second flap 32 lose the bearing and turn over, the supporting surface is opened, and the sample immediately keeps the initial posture and falls. The releasing piece can be a sliding block with a moving function (for example, the sliding block can be pulled or pushed under the action of external force), or a metal component capable of acting with a magnetic field, for example, a metal bolt, and the metal bolt can be switched between a first position and a second position through the adsorption and release of the electromagnetic chuck, so that the releasing speed of the releasing piece 33 is increased, and the probability of interference of the external force when the sample is released is reduced. The first position is located near the web 20, and may or may not be located on the web 20, and the second position may be any position away from the web 20.

Further, the first flap 31 and the second flap 32 may be connected to the connection plate 20 through rotation shafts, so that the first flap 31 and the second flap 32 may rotate relative to the connection plate 20 around the corresponding rotation shafts. The position of the rotating shaft can be located on one side of the turning plate or in the middle of the turning plate, and as long as one side of the turning plate bears against the release piece 33, the gravity center of the turning plate can be ensured to be stable. Preferably, the position of the rotating shaft is located at one side of the turning plate, so that the supporting area of the supporting surface is increased, and the placing requirements of samples with different sizes are met. In addition to this, the shape of the support surface can be determined depending on the state of the first flap 31 and the second flap 32 when bearing against the release 33. For example, when the release member 33 is located at the first position, the first flap 31 and the second flap 32 horizontally bear against the release member 33, the included angle between the first flap 31 and the second flap 32 is 180 °, and the bearing surface is a plane; when the first flap 31 and/or the second flap 32 are obliquely supported on the release member 33, an included angle between the first flap 31 and the second flap 32 can be theoretically 0 to 180 degrees (not including 180 degrees), and particularly, the state of the first flap 31 and the second flap 32 supported on the release member 33 can be adjusted according to the shape or the initial falling posture of the sample, so that the sample falling experiment with small volume and complex shape can be facilitated.

An acceleration device 40 is connected to the first flap 31 and the second flap 32 for accelerating the turning of the first flap 31 and the second flap 32 when the release member 33 is switched from the first position to the second position. Specifically, the accelerating device 40 may be a device capable of driving the flap to rotate, such as a motor, a spring, a pull rope, and the like.

After the test is finished, the first turning plate 31 and the second turning plate 32 can be reset manually, and the first turning plate 31 and the second turning plate 32 can also be connected through the motor to reset automatically so as to prepare for the next test.

Further, in order to ensure the stability of the upright post 20, as shown in fig. 1, the upright post 20 may be installed against a steel platform 80 and reinforced by the triangular section bar 11, so as to ensure the overall operation stability of the drop test machine 100.

The drop test machine 100 controls the placement and the drop of the sample by controlling the formation and the opening of the supporting surface, so that the lateral interference of the external environment to the sample at the moment of releasing the sample can be reduced, the sample is prevented from deviating from the preset drop direction when falling, and the drop test precision is improved; meanwhile, the overturning speed of the turning plate can be improved through the accelerating device 40, so that the sample falls instantaneously, and the interference caused by instant turning plate rebounding caused by releasing due to the deformation of the turning plate to the falling of the sample is avoided, thereby further ensuring the falling test precision.

In an exemplary embodiment, as shown in fig. 2, the releasing device 30 further includes a first connecting shaft 311 and a second connecting shaft 321 having one end connected to the connecting plate 20; a first bearing 312 is sleeved on the first connecting shaft 311, the outer ring of the first bearing 312 is connected with the first turning plate 31, a second bearing 322 is sleeved on the second connecting shaft 321, and the outer ring of the second bearing 322 is connected with the second turning plate 32; when the releasing member 33 is switched from the first position to the second position, the first flap 31 is turned around the first connecting shaft 311, and the second flap 32 is turned around the second connecting shaft 321. In other embodiments, the inner ring of the first bearing 312 may be connected to the first flap 31 through the first connecting shaft 311, and the outer ring of the first bearing 312 is connected to the connecting plate 20, which may be selected by a technician according to actual situations, and the present application is not limited thereto.

Further, the drop tester 100 further includes a first stopper mechanism (not shown) connected to the first connecting shaft 311 or the connecting plate 20, and a second stopper mechanism (not shown) connected to the second connecting shaft 321 or the connecting plate 20; when the release member is located at the second position, the first stop mechanism prevents the first turning plate 31 from turning over, and the second stop mechanism prevents the second turning plate 32 from turning over.

Specifically, the above-mentioned stopping mechanism may adopt an elastic element and the elastic element is disposed at the position of the turning plate corresponding to the position of the release member located at the second position, and for convenience of description, the position may be referred to as a stopping position. Taking the first flap 31 as an example, when the first flap 31 is turned to its stopping position around the first connecting shaft 311, the elastic element stops the first flap 31, and the first flap 31 slightly swings to the stopping position until stopping. Preferably, the elastic element is used as a stop mechanism to protect the first turning plate 31, so that the first turning plate 31 is prevented from being broken after being impacted on a harder boundary for multiple times, and the service life of the first turning plate 31 is prolonged. It should be noted that the stopping mechanism may be installed on the first connecting shaft 311 or the connecting plate 20, and the installation position of the stopping mechanism only needs to correspond to the stopping position of the first turning plate 31. Taking fig. 2 as an example, the stop position of the first turning plate 31 is preferably a position when the first turning plate 31 is turned clockwise by 90 ° around the first connecting shaft 311 and is perpendicular to the ground, the stop position of the second turning plate 32 is preferably a position when the second turning plate 32 is turned counterclockwise by 90 ° around the second connecting shaft 321 and is perpendicular to the ground, and the stop mechanism may be a damping spring or an elastic rubber plate.

In other embodiments, the stopping mechanism may further select a ratchet gear for stopping, and may specifically be selected according to an actual rotation requirement of the turning plate, which is not limited in this application.

In an exemplary embodiment, as shown in fig. 2, a first limiting portion 21 is disposed on the connecting plate 20, and the first limiting portion 21 is located between the first flap 31 and the second flap 32 and is used for limiting the release member 33 when the release member 33 is located at the first position. The shape of the first position-limiting portion 21 may be a through hole with a long strip shape, a circular shape, a triangular shape or a diamond shape. Preferably, the first limiting portion 21 is an elongated through hole having a predetermined length, and preferably extends in a vertical direction. So, can adjust the first position of release 33 through the position of adjustment release 33 in first spacing portion 21 for the contained angle that first board 31 and second turned over and form 32 can be adjusted at 0 to 180 (do not contain 0) within range this moment, and then conveniently adjusts the initial posture of placing of sample (the anchor clamps help of the usable sponge preparation after adjusting is fixed), satisfies the posture requirement that falls of complicated shape sample. Preferably, the included angle formed by the first flap 31 and the second flap 32 is adjustable within a range of 45 ° to 180 °. As shown in fig. 3. When the position of the release member 33 in the first stopper portion 21 is determined, the release member 33 can be fixed at the corresponding position of the first stopper portion 21 by means of the release member mounting plate 34 in a screw-fixing manner.

Further, with reference to fig. 2, the connecting plate 20 is further provided with a second limiting portion 22 and a third limiting portion 23, the first connecting shaft 311 is disposed on the second limiting portion 22, and the second connecting shaft 321 is disposed on the third limiting portion 23; the second position-limiting portion 22 is used for limiting the position of the first connecting shaft 311 corresponding to the position of the releasing element 33 in the first position-limiting portion 21 when the releasing element 33 is located at the first position, and the third position-limiting portion 23 is used for limiting the position of the second connecting shaft 321 corresponding to the position of the releasing element 33 in the first position-limiting portion 21 when the releasing element 33 is located at the first position.

Specifically, since the length of the flap is generally fixed, after the included angle between the first flap 31 and the second flap 32 is determined when the release element 33 is located at the first position, the positions of the first connecting shaft 311 and the second connecting shaft 321 can be correspondingly determined according to the position of the release element 33 in the first position-limiting portion 21. The second position-limiting part 22 and the third position-limiting part 23 may be through holes having a shape of a long strip, a circle, a triangle, or a diamond. Taking the second limiting portion 22 as an example, when the second limiting portion 22 is a strip-shaped through hole (as shown in fig. 2), the second limiting portion 22 preferably extends along the horizontal direction, after the position of the releasing element 33 in the first limiting portion is determined, the position of the releasing element 33 is taken as the center of a circle, the length of the first turning plate 31 is taken as the radius to make a circle, the position of the first connecting shaft 311 in the second limiting portion 22 can be determined according to the intersection position of the circle and the second limiting portion 22, and the first connecting shaft 311 can be fixed at the position by a fixing element such as a nut, under the above conditions, stepless adjustment can be realized on the included angle between the first turning plate 31 and the second turning plate 32; when the second limiting portion 22 is a circular through hole, the circular through hole may have a plurality of through holes and is preferably arranged at intervals along the horizontal direction, so that the angle adjustment of the fixed point can be realized for the included angle between the first turning plate 31 and the second turning plate 32, thereby simplifying the processing technology of the connecting plate 20. The third position-limiting portion 23 and the second position-limiting portion 22 are arranged in the same manner, and will not be described herein again.

In an exemplary embodiment, as shown in fig. 2, the acceleration device 40 includes: the first tension spring 41 is connected with the connecting plate 20 through the first mounting plate 43, and when the release member 33 is located at the first position, the first tension spring 41 is in a stretching state and is connected with the first turning plate 31; and a second tension spring 42 connected to the connecting plate 20 through a second mounting plate 44, wherein when the release member 33 is located at the first position, the second tension spring 42 is in a stretched state and is connected to the second flap 32. Preferably, the first tension spring 41 is connected to a portion of the first flap 31 close to the release member 33 when bearing against the release member 33, and the second tension spring 42 is connected to a portion of the second flap 32 close to the release member 33 when bearing against the release member 33, so that the linear velocity of the portion where the flap is deformed most is maximized, thereby separating from the sample most quickly and preventing the flap from rebounding to affect the drop test.

Furthermore, in order to avoid the resistance of the turning plate to the tension spring in the resetting process, a check ring with a notch can be arranged at the connecting position of the turning plate and the tension spring, so that the tension spring is hooked on the check ring. After the fall is finished once, the tension spring can be taken down from the notch of the check ring and then the turnover plate is reset.

In an exemplary embodiment, when the connection plate 20 is configured to be slidably connected with the column 10, the drop tester may further include a lifting device 50, and the lifting device 50 includes: a motor; and the winch is connected with the power output end of the motor and is used for rotating under the driving of the motor, a twisted rope is wound on the winch, and one end, far away from the winch, of the twisted rope is connected with the connecting plate 20. In another embodiment, as shown in fig. 1, the electric box 90 can be used to control the operation of the motor, so as to realize automatic falling height adjustment. Further, in order to ensure the stable operation of the motor, the motor can also be arranged on the steel platform 80, meanwhile, the top of the upright post 10 is provided with a pulley, and the twisted rope can be connected with the connecting plate 20 by bypassing the pulley, so that the connecting plate 20 is pulled, and the falling height of the sample is adjusted. In order to control the falling height more accurately, a displacement sensor and/or a laser distance meter can be arranged on the upright post 10 to measure the lifting height of the turning plate together.

In an exemplary embodiment, as shown in fig. 4, further comprising a ground surface impact device 60, the ground surface impact device 60 comprising: the steel flat plate 61 is arranged on the ground and corresponds to the supporting surface; and the steel edge concrete plate 62 is arranged in the angle iron frame 63, and the steel edge concrete plate 62 is stacked on the steel flat plate 61, so that the steel edge concrete plate 62 is prevented from cracking after being impacted for a long time. Further, an adjustable pad may be disposed at the bottom of the steel plate 61 to adjust the height and level of the steel plate 61. Preferably, the thickness of the steel flat plate 61 is 8mm-10mm, and the thickness of the steel edge concrete plate 62 is 180mm-220 mm.

In an exemplary embodiment, as shown in fig. 1 and 4, the drop tester 100 further includes a plurality of wind deflectors 70, the wind deflectors 70 being circumferentially disposed around the ground impact device 60. By arranging the wind shield 70, the external force interference of the tested article in the falling process can be reduced as much as possible, so that the tested article is prevented from rolling in the falling process; meanwhile, the tested sample can be protected, the phenomenon that the tested sample is ejected too far after falling to the ground or part fragments splash is avoided, and the safety of surrounding technicians is guaranteed. Preferably, the number of wind deflectors 70 is 3, and the height is 1m to 1.5 m.

In conclusion, the drop test machine 100 can support the drop height of 0-5 m, can meet the test precision requirements of samples with small volumes and complex shapes, and has the advantages of simple structure, high response speed, large height range, high test precision, good repeatability, strong operation stability and the like.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A drop test machine, comprising:

a column;

the connecting plate is arranged on the upright post;

2. The drop test machine according to claim 1, wherein the release device further comprises a first connecting shaft and a second connecting shaft having one end connected to the connecting plate;

a first bearing is sleeved on the first connecting shaft, the outer ring of the first bearing is connected with the first turning plate, a second bearing is sleeved on the second connecting shaft, and the outer ring of the second bearing is connected with the second turning plate;

when the release piece is switched from the first position to the second position, the first turning plate turns around the first connecting shaft, and the second turning plate turns around the second connecting shaft.

3. The drop testing machine according to claim 2, wherein a second limiting part and a third limiting part are further arranged on the connecting plate, the first connecting shaft is arranged on the second limiting part, and the second connecting shaft is arranged on the third limiting part;

the second limiting part is used for limiting the first connecting shaft corresponding to the position of the release piece in the first limiting part when the release piece is located at the first position;

the third limiting part is used for limiting the second connecting shaft corresponding to the position of the release piece in the first limiting part when the release piece is located at the first position.

4. The drop tester of claim 3,

the second limiting part and the third limiting part comprise strip-shaped through holes; or the like, or, alternatively,

the second limiting part and the third limiting part comprise a plurality of circular through holes distributed at intervals.

5. The drop tester according to claim 2, further comprising a first stop mechanism connected to the first connecting shaft or the connecting plate and a second stop mechanism connected to the second connecting shaft or the connecting plate;

when the release piece is located at the second position, the first stop mechanism blocks the first turning plate from turning, and the second stop mechanism blocks the second turning plate from turning.

6. The drop tester of claim 5, wherein the first and second stop mechanisms comprise resilient elements.

7. The drop tester of claim 1, wherein the connection plate is configured to slidingly connect with the column, the drop tester further comprising a lifting device comprising:

a motor; and the number of the first and second groups,

the winch is connected with the power output end of the motor and used for rotating under the driving of the motor, a twisted rope is wound on the winch, and one end, far away from the winch, of the twisted rope is connected with the connecting plate.

8. The drop tester of claim 1, further comprising a ground-borne device, the ground-borne device comprising:

the steel flat plate is arranged on the ground and corresponds to the supporting surface;

and the steel ladle edge concrete plate is arranged in the angle iron frame, and the steel ladle edge concrete plate is arranged on the steel flat plate in a stacking manner.

9. The drop tester of claim 8, further comprising a plurality of wind deflectors circumferentially disposed about the ground-impacted device.

10. The drop tester of any one of claims 1-9, wherein the release member comprises a metal latch that switches between the first position and the second position by suction and release of an electromagnetic chuck.