CN111366324A - Electronic impact tester - Google Patents

Abstract

The invention provides an electronic impact testing machine, which comprises a control device, a lifting device and an impact device, wherein the impact device comprises a rack and an impact object, the impact object is movably arranged on the rack, the lifting device comprises an extraction mechanism and a driving mechanism, the driving mechanism is directly or indirectly connected with and drives the extraction mechanism to perform lifting action, the control device is electrically connected with the lifting device, the driving mechanism is controlled to drive the extraction mechanism to lift to a preset low position and a preset high position, and the extraction mechanism is controlled to extract or release the impact object, so that the impact object can fall in the vertical direction under the action of gravity relative to the rack. According to the electronic impact test, the impact object does not need to be lifted to the height required by the test through manpower and then released, the precision is more accurate, the manpower is saved, and the result accuracy of the impact test can be effectively improved.

Description

Electronic impact tester

Technical Field

The invention belongs to the field of detection and testing, and particularly relates to an electronic impact testing machine.

Background

Impact testing is a test method for determining the safety, reliability and effectiveness of products when military and civil equipment is subjected to impact or action of external force.

At present, when carrying out the impact test, adopt the gauge rod that has a scale to lift the impact thing by the manpower again to the height of demarcation on the gauge rod, carry out the impact test again, generally speaking, strike the heavy object through the manpower promotion except extravagant manpower, the height that promotes is also inaccurate, can influence subsequent impact test's result to lead to the test result inaccurate.

Therefore, an electronic impact tester with high accuracy and low labor consumption is needed.

Disclosure of Invention

The invention aims to provide an electronic impact tester which can save labor and has high accuracy.

In order to achieve the above object, the present invention provides an electronic impact testing machine, which includes a control device, a lifting device and an impact device, wherein the impact device includes a rack and an impact object, the impact object is movably mounted on the rack, the lifting device includes an extraction mechanism and a driving mechanism, the driving mechanism is directly or indirectly connected with and drives the extraction mechanism to perform lifting action, the control device is electrically connected with the lifting device, the driving mechanism is controlled to drive the extraction mechanism to lift to a preset low position and a preset high position, and the extraction mechanism is controlled to extract or release the impact object, so that the impact object can fall in a vertical direction under the action of gravity relative to the rack.

Compared with the prior art, the impact testing device can automatically grab the impact object through the extraction mechanism, drive the impact object to rise to the preset high position through the driving mechanism, and control the extraction mechanism to release the impact object, so that the impact object freely falls onto the object to be tested, the impact object does not need to be lifted to the height required by the test through manpower and then released, the precision is more accurate, the manpower is saved, and the result accuracy of the impact test can be effectively improved.

Preferably, the electronic impact testing machine comprises a testing platform, and the testing platform is arranged below the impact object and used for bearing and fixing the object to be tested.

Preferably, a sliding rail is arranged on the rack along the vertical direction, the impact object is slidably mounted on the sliding rail, and the extraction mechanism extracts the impact object and can be driven by the driving mechanism to ascend to a preset high position along the sliding rail.

Specifically, the lower end of the sliding rail is provided with an opening so that the impact object can be completely or partially separated from the sliding rail under the action of gravity.

Preferably, the frame is movably provided with a mounting part, the impact object is supported on the mounting part, and the mounting part can move relative to the frame to be separated from the moving track of the impact object. The mounting part can be a mounting platform which is rotatably mounted or detachably mounted on the rack, and the impact object is borne on the mounting platform; the mounting part can also be a movable bolt which is slidably mounted on the rack and can be connected with the impact object in a clamping way, the movable bolt can slidably extend out of the rack and extend into the clamping groove of the impact object so that the impact object is hung on the movable bolt, and when the impact device is used, the impact object can freely lift relative to the rack by pulling out the movable bolt.

Preferably, the driving mechanism comprises a stepping motor and a vertically arranged screw rod, the stepping motor is connected with the screw rod and drives the screw rod to rotate, and the extracting mechanism is installed on the screw rod in a matched mode and can slide relative to the rack along with the rotation of the screw rod.

Preferably, the extracting mechanism comprises a mounting frame, an extracting member and a driving member, the driving mechanism is connected with the mounting frame and drives the mounting frame to move up and down, the driving member is mounted on the mounting frame, and the driving member is connected with the extracting member and drives the extracting member to move so as to grab or release the impact object.

Specifically, the extracting piece comprises a claw part which is rotatably arranged on the mounting frame and used for grabbing the impact object, and the driving piece drives the claw part to rotate, stretch and retract to lift or release the impact object.

More specifically, the extraction piece is rotatably mounted on the mounting bracket about a rotating shaft, and the extraction piece is formed with a claw portion and an operating portion connected to a driving piece at both opposite sides of the rotating shaft, respectively, the driving piece is connected to the operating portion and drives the operating portion to rotate about the rotating shaft, thereby rotating the claw portion to grab or release the impact object.

Specifically, the driving piece comprises a cylinder and a linkage rod, one end of the linkage rod is rotatably connected with the cylinder, and the other end of the linkage rod is rotatably connected with the extracting piece.

More specifically, the cylinder is an ultra-thin cylinder.

Specifically, the frame is provided with a lower extreme along vertical direction and has an open-ended sliding channel, and sliding channel has seted up vertical spout along the slip direction, strikes thing slidable mounting in sliding channel, and is equipped with on the position that corresponds with vertical spout on the thing that strikes and picks the handle or snatch the groove with drawing mechanism complex, and the driving piece can drive and draw the piece and stretch out and with snatch the handle block to snatch and strike the thing.

More specifically, the position that corresponds with vertical spout on the impact thing is equipped with the snatching handle that cooperates with the mechanism that draws in the epirelief, snatchs the handle and stretches out the slip passageway from vertical spout, and the driving piece can drive the piece of drawing and stretch out and draw in below the handle with the block to snatch the impact thing.

Specifically, the electronic impact tester further comprises a limiting plug, and the limiting plug can be mounted on the rack and can open or close an opening at the lower end of the sliding channel. The opening at the lower end of the sliding channel is sealed, so that the impact object can be prevented from falling off, and the limiting plug is opened to expose the opening at the lower end so that the impact object can fall off to the object to be tested.

Preferably, the outside of the sliding channel is provided with a scale for indicating the height of the impact object along the longitudinal sliding groove. This scheme makes and promotes the in-process that the impact object promoted to the lifting height, and the accessible has the slide channel of scale to directly observe the lifting height, avoids leading to lifting height to set up the mistake because misoperation to influence the result of impact test.

Preferably, the extracting mechanism is provided with an inertial sensor or a weight sensor, the inertial sensor or the weight sensor outputs a stop signal when the extracting mechanism is in a static state, and the control device controls the extracting mechanism to release the impact object after the impact object is at a preset height and receives the stop signal, so that the measuring accuracy is improved.

Preferably, the impact object is slidably mounted on the frame in the vertical direction, so that the impact object can be conveniently grabbed by the picking mechanism, and the impact object can freely fall under the action of gravity after the impact object is released by the picking mechanism.

Preferably, the electronic impact testing machine further comprises a locking piece, wherein the locking piece is mounted on the rack and can lock the impact object at a preset low position or release the impact object, so that the impact object can be conveniently grabbed at the preset low position by the picking mechanism.

The electronic impact testing machine further comprises an input module, the input module generates corresponding height data according to an external signal, and the control device modifies a parameter value of a preset high position according to the height data.

The electronic impact testing machine further comprises an input module, the input module further generates a starting command, a lifting command and a releasing command according to an external control command, the control device controls the driving mechanism to act according to the starting command so that the extracting mechanism moves to a preset low position, controls the extracting mechanism to act according to the lifting command so as to capture an impact object, controls the driving mechanism to act after the impact object is captured so that the extracting mechanism rises to a preset high position, and controls the extracting mechanism to release the impact object according to the releasing command.

Drawings

FIG. 1 is a schematic diagram of an electronic impact testing machine according to the present invention with an extracting mechanism moving to a predetermined low position.

Fig. 2 is a partially enlarged view of fig. 1.

FIG. 3 is a schematic diagram of an electronic impact testing machine according to the present invention, wherein the picking mechanism picks up the impact object at a predetermined low position.

FIG. 4 is a schematic diagram of the electronic impact testing machine according to the present invention with the pick-up mechanism moving to a predetermined high position.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is a schematic view of the structure of the impactor of the invention.

FIG. 7 is a block diagram of the control portion of the electronic impact tester according to the present invention.

FIG. 8 is a schematic view of a portion of the electronic impact tester according to the second embodiment of the present invention before testing.

FIG. 9 is a schematic view of a portion of an electronic impact tester according to a second embodiment of the present invention.

Fig. 10 is a partial structural view of the second embodiment of the present invention in which the impact object falls to the lowest position.

Detailed Description

In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present invention provides an electronic impact testing machine 100, which includes a control device 11, a lifting device and an impact device, wherein the impact device includes a rack 10 and an impact object 40, the impact object 40 is movably mounted on the rack 10, the lifting device includes an extraction mechanism 50 and a driving mechanism 20, the driving mechanism 20 drives the extraction mechanism 50 to move up and down, the control device 11 is electrically connected to the lifting device, the driving mechanism 20 is controlled to drive the extraction mechanism 50 to move up and down to a preset low position and a preset high position, and the extraction mechanism 50 is controlled to grab or release the impact object 40, so that the impact object can fall down in a vertical direction under the action of gravity relative to the rack 10. When the device works, the control device 11 controls the driving mechanism 20 to drive the extracting mechanism 50 to move to the preset low position, and controls the extracting mechanism 50 to grab the impact object 40 at the preset low position, and then drives the impact object 40 to move to the preset high position and release, so that the impact object 40 can fall down in the vertical direction relative to the rack 10 under the action of gravity.

In this embodiment, the impact object 40 is slidably mounted to the frame 10 and is freely movable in a vertical direction with respect to the frame 10. Of course, the impact object 40 may also be directly carried on the rack 10 or hung on the rack 10, and then the impact object 40 is directly extracted by the extraction mechanism 50 and moved to the test area, and then the impact object 40 is driven by the driving mechanism 20 to rise to the preset high position and then released. Of course, the mounting member may be movably disposed on the rack 10, the impact object 40 may also be directly supported on the rack 10 or hung in the testing area of the rack 10, and then the mounting member is detached or controlled to be separated from the testing area after the impact object 40 is extracted by the extracting mechanism 50, and when the impact object 40 is lifted to the preset high position by the driving mechanism 20 and then released, the impact object will freely fall onto the object under the action of gravity.

In a preferred embodiment of the present invention, the object to be tested can be placed on a general ground, or a test platform 61 can be provided for the type of the object to be tested, the test platform 61 is used for carrying and placing the object to be tested, and other auxiliary devices can be used to fix the object to be tested, and meanwhile, the material used for the test platform 61 has a certain degree of rigidity to provide sufficient supporting force for the object to be tested, so as to not absorb the acting force applied when the object to be tested is impacted by the impact object 40, thereby improving the detection accuracy.

Referring to fig. 2, 5 and 6, in a preferred embodiment of the present invention, the frame 10 is provided with a sliding channel 31 having an opening at a lower end thereof along a vertical direction, the testing platform 61 is disposed below the opening of the sliding channel 311, and the impact object 40 is slidably mounted in the sliding channel 31, and can freely fall down relative to the sliding channel 31 under the action of gravity and fall onto the object to be tested at the testing platform 61 through the opening of the sliding channel 31. Of course, the impact object is not necessarily installed in the rack 10 through the sliding channel 311, and other sliding tracks may be installed on the rack 10 along the vertical direction, for example, a longitudinal sliding slot is opened on the rack 10 along the vertical direction, a sliding block in sliding fit with the longitudinal sliding slot is installed on one side of the impact object, the impact object is connected with the longitudinal sliding slot through the sliding block in a sliding manner, and the impact object is exposed outside the rack at this time.

Referring to fig. 1 and 5, the driving mechanism 20 includes a stepping motor 21 and a vertically disposed lead screw 22, the stepping motor 21 is connected to the lead screw 22 and drives the lead screw 22 to rotate, and the extracting mechanism 50 is mounted on the lead screw 22 in a matching manner and can slide relative to the frame 10 along with the rotation of the lead screw 22. When the stepping motor 21 controls the screw rod 22 to rotate, the screw rod 22 ascends and descends by 1cm every time the screw rod 22 rotates by one turn, so that the ascending and descending stroke of the screw rod 22 is controlled through the rotating angle of the stepping motor 21, and the control precision is high.

Referring to fig. 1 to 5, the extracting mechanism 50 includes a mounting frame 53, an extracting element 52, and driving elements (51, 54), the driving mechanism 20 is connected to the mounting frame 53 and drives the mounting frame 53 to move up and down, the driving elements (51, 54) are mounted on the mounting frame 53, and the driving elements (51, 54) are connected to the extracting element 52 and drive the extracting element 52 to move so as to grab or release the impact object 40. The lifting piece 52 comprises a claw part 521 which is rotatably arranged on the mounting frame 53 and grabs the impact object 40, and the driving pieces (51 and 54) drive the claw part 521 to rotate, extend and retract so as to lift or release the impact object 40. In the present embodiment, the driving mechanism 20 is directly connected to the extracting mechanism 50, but the driving mechanism 20 may be indirectly connected to the extracting mechanism 50 to control the operation of the extracting mechanism 50.

Referring to fig. 2 and 5, the extracting member 52 is rotatably mounted on the mounting frame 53 about a rotating shaft 523, and the extracting member 52 forms a hook claw portion 521 and an operating portion 522 connected to driving members (51, 54) on opposite sides of the rotating shaft 523, respectively, and the driving members (51, 54) are connected to the operating portion 522 and rotate the operating portion 522 about the rotating shaft 523, thereby rotating the hook claw portion 521 to grab or release the impact object 40. The hook portion 521 is engaged with the handle of the impact object 40 via a hook thereon to lift the impact object 40.

The driving member (51, 54) comprises a cylinder 51 and a linkage rod 54, one end of the linkage rod 54 is rotatably connected with the cylinder 51, and the other end is rotatably connected with the extraction member 52. The cylinder 51 is an ultra-thin cylinder.

Referring to fig. 2, 5 and 6, the frame 10 is provided with a sliding channel 31 having an opening at a lower end in a vertical direction, the test table 61 is disposed below the opening of the sliding channel, the sliding channel 31 is provided with a longitudinal sliding slot 32 in the sliding direction, the impact object 40 is slidably mounted in the sliding channel 31, a grabbing handle 41 matched with the claw portion 521 is convexly disposed at a position on the impact object 40 corresponding to the longitudinal sliding slot 32, the grabbing handle 41 protrudes out of the sliding channel 31 from the longitudinal sliding slot 32, and the driving member (51, 54) can drive the claw portion 521 of the lifting member 52 to protrude out and be engaged with the grabbing handle 41, so as to grab the impact object 40. Of course, the impact object 40 may be provided with a corresponding grabbing groove at a position corresponding to the longitudinal sliding groove 32, and the driving member (51, 54) may drive the claw portion 521 of the extracting member 52 to extend into the grabbing groove through the longitudinal sliding groove 32 and to be engaged with the grabbing groove, so as to grab the impact object 40. Wherein, in the present embodiment, the impactor 40 is a longitudinally arranged cylinder.

In this embodiment, the longitudinal sliding groove 32 does not penetrate through to the lower end of the sliding channel 31, the lower end of the longitudinal sliding groove 32 is closed, and the impact object 40 can slide out of the lower end of the opening along the lower end opening portion of the sliding channel 31 and impact the object to be tested. Of course, in another aspect, the longitudinal runner 32 opens through to the lower end of the slide channel 31.

Referring to fig. 2 and 5, the electronic impact tester 100 further includes a limiting plug 36, the limiting plug 36 is mounted on the frame 10 and can open or close the opening at the lower end of the sliding channel 31, close the opening to prevent the impact object 40 from falling, facilitate the picking mechanism 50 to pick the impact object 40, and open the limiting plug to expose the opening at the lower end to facilitate the impact object 40 to fall when in use. Of course, the impact object 40 may be locked at the preset low position by other locking members, and the impact object 40 is contact-locked after being grabbed by the picking mechanism 50. In a preferred embodiment, the control device can be connected directly to the locking element and automatically control the locking element to contact the impact object 40 after the picking mechanism 50 picks up the impact object 40.

With reference to fig. 2, a transverse slot 35 communicating with the longitudinal sliding slot 32 is formed at a position corresponding to a preset low position of the sliding channel 31, a positioning hole 42 is formed at a position corresponding to the transverse slot 35 when the impact object 40 is at the preset low position, a positioning pin 34 passes through the transverse slot 35 and is inserted into the positioning hole 42 to prevent the impact object 40 from sliding in the sliding channel 31 without permission, and the positioning pin 34 is pulled out of the positioning hole 42 to unlock the sliding of the impact object 40 when an impact test is performed.

Referring to fig. 2 and 5, a scale 33 indicating the height of the impactor 40 is provided along the longitudinal slide groove 32 outside the slide channel 31.

Preferably, the extracting mechanism 50 is provided with an inertial sensor or a weight sensor (not shown), the inertial sensor or the weight sensor outputs a stop signal when the extracting mechanism 50 is in a static state, and the control device 11 controls the extracting mechanism 50 to release the impact object 40 when the impact object 40 is at a preset height and receives the stop signal, so as to increase the accuracy of the measurement.

Referring to fig. 7, the electronic impact testing machine 100 further includes an input module 62, the input module 62 includes a height adjustment wheel 621, the height adjustment wheel 621 is operated to generate corresponding height data, and the control device 11 modifies a parameter value of a preset high position according to the height data, that is, the height adjustment wheel 621 is rotated to adjust a specific height value of the preset high position. Of course, since the impact objects 40 with different structural specifications may be adopted, the preset low position is inevitably required to be adjusted, the operator can still generate corresponding height data through the height adjusting wheel 621, and the control device 11 modifies the parameter value of the preset low position according to the height data.

Referring to fig. 7, the input module 62 further includes an extraction button 622 and a start button 623, the start button may be operated to generate a start command, the extraction button 622 may be operated to generate a lift command and a release command, the control device 11 controls the operation of the lifting driving mechanism 20 according to the start command to move the extraction mechanism 50 to a preset low position, controls the operation of the extraction mechanism 50 according to the lift command to grab the impact object 40 at the preset low position, controls the operation of the lifting driving mechanism 20 after grabbing the impact object 40 to drive the extraction mechanism 50 grabbing the impact object 40 to rise to a preset high position, and controls the extraction mechanism 50 to release the impact object 40 according to the release command. The release command may be generated by the extraction button 622 according to an external control command, or may be automatically generated when the impactor 40 rises to a preset high position and is in a static state.

Specifically, the control device 11 also records the result of the impact test after the test is finished.

Referring to fig. 7, the electronic impact tester 100 further includes a display 30, and the control device 11 is connected to the display 30 and displays a parameter value of a preset height, a state of the extracting mechanism 50, and a state sensed by the inertial sensor or the weight sensor.

Of course, the input module 62 may also input the corresponding start command, release command and height data by other methods, which are not limited to the above-mentioned methods, such as directly replacing the input module 62 and the display screen 30 by touching the display screen.

Referring to fig. 1 to 7, the electronic impact tester 100 operates as follows: placing the object to be tested on the testing platform 61 of the electronic impact testing machine 100, if the preset high-order value is correct, directly performing the next operation, if the preset high-order parameter value is not met, adjusting the height adjusting wheel to input the correct height value as the preset high-order parameter value, the control device 11 setting the preset high-order value according to the height data, after the setting is completed, pressing the start button to generate a start command, the control device 11 controlling the driving mechanism 20 to act, the stepping motor 21 driving the lead screw 22 to rotate, so that the extracting mechanism 50 descends to the preset low-order (as shown in fig. 1), pressing the extracting button to generate an extracting command, the control device 11 controlling the driving members (51, 54) to act, the driving members (51, 54) driving the extracting member 52 to rotate so that the hook claw portion 521 extends out and is engaged with the grasping handle 41 of the impact object 40, at this time, the impact object 40 is hung on the extracting member 52 (as shown in fig. 3), in the process, whether the set lifting height is wrong can be judged by observing the lifting height of the impact object 40 along the sliding channel 31, when the impact object 40 is lifted to the preset height and the control device 11 receives a static signal of an inertial sensor or a weight sensor (as shown in fig. 4), a release command is input, the control device 11 controls the cylinder 51 to stretch and retract so that the extraction piece 52 releases the impact object 40, the impact object 40 freely falls under the action of gravity, and the lower half part of the impact object passes through an opening of the sliding channel 31 and falls on an object to be tested (not shown) of the test bench 61, so as to perform impact test.

When a secondary impact test is required, a preset low-level value is adjusted according to the current position of the impact object 40, a start button is pressed, the control device 11 controls the driving mechanism 20 to act, the extraction mechanism 50 is lowered to a new preset low level, the extraction button is pressed to input an extraction command, the control device 11 controls the extraction mechanism 50 to extract the impact object 40, the driving mechanism 20 is controlled to act, the impact object 40 is raised to a preset high level, when the impact object 40 is raised to the preset high level and the control device 11 receives a static signal of an inertial sensor or a weight sensor, the extraction button is pressed to input a release command, and the control device 11 controls the extraction mechanism 50 to release the impact object 40.

When the third to nth impact tests are required, the start button is directly pressed, the control device 11 controls the driving mechanism 20 to operate, the extraction mechanism 50 is lowered to a new preset low position, the extraction button is pressed to input an extraction command, the control device 11 controls the extraction mechanism 50 to extract the impact object 40, the driving mechanism 20 is controlled to operate, the impact object 40 is raised to a preset high position, when the impact object 40 is raised to the preset high position and the control device 11 receives a static signal of an inertia sensor or a weight sensor, the extraction button is pressed to input a release command, and the control device 11 controls the extraction mechanism 50 to release the impact object 40.

Referring to fig. 8 to 10, a second embodiment of the present invention is different from the first embodiment in that a mounting sleeve 71 is disposed on the frame 10 of the electronic impact tester 100a, a mounting hole 73 is disposed on the mounting sleeve 71, a positioning hole 44 engaged with the mounting member 72 is disposed on the impact object 40a, and the mounting member 72 is engaged with the positioning hole 44 through the mounting hole 73 to mount the impact object 40a on the mounting sleeve 71, but the mounting sleeve 71 may be replaced by other structures and is not necessarily sleeve-shaped.

In order to facilitate the picking mechanism to pick the impact object 40a, a fixture block 43 matched with the picking mechanism is convexly arranged on the impact object 40 a.

In this embodiment, the extracting mechanism includes a clamping cylinder and a plurality of clamping blocks, and the clamping cylinder drives the plurality of clamping blocks to move relatively to clamp or release the impact object 40 a. In order to facilitate the clamping block to grab the impact object 40a, two opposite sides of the upper end of the impact object 40a are provided with grabbing grooves clamped with the grabbing blocks, and the two grabbing blocks can relatively extend into the grabbing grooves to grab the impact object 40 a.

In order to prevent the impact object 40a from being separated from the rack 10 during the test, the mounting sleeve 71 is provided with a clamping groove 74 which can be clamped with the clamping block 43, so that the impact object 40a is prevented from being separated from the mounting sleeve 71 under the action of gravity. In order to facilitate the impact object 40a to fall into the mounting sleeve 71, the upper end opening of the mounting sleeve 71 is larger than the lower end opening, and the lower end opening is larger than or equal to the diameter of the impact object 40a, and the inlet of the clamping groove 74 is gradually enlarged, so that the clamping block 43 can be inserted into and clamped with the clamping block.

Referring to fig. 8 and 10, the impact object 40a is shown mounted on the mounting sleeve 71 prior to impact testing. Fig. 9 and 10 are schematic structural diagrams illustrating that the impact object 40a falls freely under gravity after the impact object 40a is extracted to a preset height and released during the impact test. Referring to fig. 10, the impactor 40a descends to the lowest position, where the object is higher than or equal to the lowest position on the test platform 61, so that the object is on the falling trajectory of the impactor 40 a.

The above are merely preferred embodiments of the present invention, and the scope of the claims of the present invention should not be limited thereto. Corresponding changes can be made reasonably within the scope of the inventive concept. Therefore, the protection scope of the present invention shall be subject to the claims.

Claims (18)

1. An electronic impact tester is characterized in that: including controlling means, elevating gear and impact device, impact device contains the frame and strikes the thing, strike thing movable mounting in the frame, elevating gear contains and draws mechanism and actuating mechanism, actuating mechanism directly or indirectly connects and drives draw the mechanism and carry out the action of going up and down, controlling means with the elevating gear electricity is connected, controls the actuating mechanism drive draw the mechanism and go up and down to predetermineeing the low level and predetermineeing the high level, and control draw the mechanism and draw or release strike the thing, make strike the thing can for the frame falls along vertical direction under the action of gravity.

2. The electronic impact tester of claim 1, wherein: the electronic impact testing machine comprises a testing platform, wherein the testing platform is arranged below the impact object and is used for bearing and fixing the object to be tested.

3. The electronic impact tester of claim 1, wherein: the frame is provided with a sliding rail along the vertical direction, the impact object is slidably mounted on the sliding rail, and the extraction mechanism extracts the impact object and can be driven by the driving mechanism to ascend to a preset high position along the sliding rail.

4. The electronic impact tester of claim 3, wherein: the lower end of the sliding rail is provided with an opening so that the impact object can be completely or partially separated from the sliding rail under the action of gravity.

5. The electronic impact tester of claim 1, wherein: the rack is movably provided with a mounting part, the impact object is supported on the mounting part, and the mounting part can move relative to the rack so as to be separated from a moving track of the impact object.

6. The electronic impact tester of claim 1, wherein: the driving mechanism comprises a stepping motor and a vertically arranged screw rod, the stepping motor is connected with the screw rod and drives the screw rod to rotate, and the extracting mechanism is installed on the screw rod in a matched mode and can slide relative to the rack along with the rotation of the screw rod.

7. The electronic impact tester of claim 1, wherein: draw the mechanism and include the mounting bracket, draw piece and driving piece, actuating mechanism with the mounting bracket links to each other and drives the mounting bracket lift action, the driving piece install in on the mounting bracket, just the driving piece with draw the piece and link to each other and drive draw the piece action in order to snatch or release and strike the thing.

8. The electronic impact tester of claim 7, wherein: the extracting piece comprises a claw part which is rotatably arranged on the mounting rack and used for grabbing the impact object, and the driving piece drives the claw part to rotate and stretch to lift or release the impact object.

9. The electronic impact tester of claim 8, wherein: the extracting piece is rotatably installed on the installation frame around a rotating shaft, the two opposite sides of the rotating shaft of the extracting piece are respectively provided with the claw part and an operating part connected with the driving piece, and the driving piece is connected with the operating part and drives the operating part to rotate around the rotating shaft, so that the claw part rotates to grab or release an impact object.

10. The electronic impact tester of claim 7, wherein: the driving piece comprises a cylinder and a linkage rod, one end of the linkage rod is rotatably connected with the cylinder, and the other end of the linkage rod is rotatably connected with the extracting piece.

11. The electronic impact tester of claim 7, wherein: the frame is provided with a sliding channel with an opening at the lower end along the vertical direction, the sliding channel is provided with a longitudinal sliding groove along the sliding direction, the impact object is slidably mounted in the sliding channel, a grabbing handle or a grabbing groove matched with the picking mechanism is arranged on the position, corresponding to the longitudinal sliding groove, of the impact object, and the driving piece can drive the picking piece to extend out and be clamped with the grabbing handle, so that the impact object is grabbed.

12. The electronic impact tester of claim 11, wherein: and a grabbing handle matched with the extracting mechanism is convexly arranged at a position, corresponding to the longitudinal sliding groove, on the impact object, the grabbing handle extends out of the sliding channel from the longitudinal sliding groove, and the driving part can drive the extracting part to extend out and be clamped below the extracting handle, so that the impact object is grabbed.

13. The electronic impact tester of claim 11, wherein: the limiting plug is mounted on the rack and can open or close an opening at the lower end of the sliding channel.

14. The electronic impact tester of claim 11, wherein: and scales for indicating the height of the impact object are arranged on the outer side of the sliding channel along the longitudinal sliding groove.

15. The electronic impact tester of claim 1, wherein: the extraction mechanism is provided with an inertial sensor or a weight sensor, the inertial sensor or the weight sensor outputs a stop signal when the extraction mechanism is in a static state, and the control device controls the extraction mechanism to release the impact object when the impact object is at a preset height and receives the stop signal.

16. The electronic impact tester of claim 1, wherein: the impact piece locking device is characterized by further comprising a locking piece, wherein the locking piece is mounted on the rack and can lock the impact piece at the preset low position or release the impact piece.

17. The electronic impact tester of claim 1, wherein: the height control device further comprises an input module, the input module generates corresponding height data according to an external signal, and the control device modifies the parameter value of the preset high position according to the height data.

18. The electronic impact tester of claim 1, wherein: the control device controls the driving mechanism to move to a preset low position according to the starting command, controls the extraction mechanism to move to grab the impact object according to the lifting command, controls the driving mechanism to move to a preset high position after grabbing the impact object, and controls the extraction mechanism to release the impact object according to the releasing command.

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