CN210154955U

CN210154955U - Furniture impact testing machine

Info

Publication number: CN210154955U
Application number: CN201921036530.6U
Authority: CN
Inventors: 李中军
Original assignee: Dongguan Hua Hong Instrument Co Ltd
Current assignee: Dongguan Hua Hong Instrument Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-03-17
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses a furniture impact testing machine, including mounting fixture, the stand, elevating system, lifting beam and impact device etc. impact device includes impact bag, weight or steel ball or grit, the fixed disk, force value sensor, electromagnet piece or clutch, the connecting rod, cushion rubber, the connecting block, the buffer, the guide arm, the electric cylinder, the floating joint, speed reducer and lift servo motor etc. make lifting beam can go up and down to adjust through elevating system, thereby make impact device can adjust its test height along with lifting beam's lift, make it realize and can be fit for testing various not test work pieces of height, the commonality is strong; the impact testing device is provided with the impact device to perform impact testing on the testing workpiece, when the impact bag falls to the surface of the testing workpiece and the force value sensor senses that the pressure is greater than 0, the lifting servo motor in the impact device can stop working immediately according to a signal sensed by the force value sensor, so that the impact bag is prevented from damaging the testing workpiece.

Description

Furniture impact testing machine

Technical Field

The utility model relates to a test equipment field especially relates to a furniture impact tester that can carry out impact test to furniture such as office chair, sofa and desk.

Background

The traditional furniture testing machine has no drop impact testing function, such as Chinese invention patent with patent number of 201010149407.2 and patent name of 'office furniture drop test bed', later, some new furniture testing machines appear on the market, such as Chinese patent with publication number of 'CN 203858088U' and patent name of 'high-precision furniture drop impact testing machine', the tests of the compression resistance, the endurance, the firmness and the like of the produced furniture such as sofa, office chair, desk and the like are generally carried out by adopting a cylinder to lift an impact object to carry out impact testing on the furniture, the cylinder as a power source to carry out lifting motion has the defects of low running precision, constant lifting height, constant punching force of the cylinder of the same type and the like, so that the accurate testing is difficult to realize, and the furniture testing machine can not be suitable for testing products with different forces and different heights, when the furniture with different stamping forces needs to be tested, the air cylinders with different types need to be replaced, so that the operation of a user is very inconvenient, the cost for purchasing the air cylinders by the user is increased, and the problem of poor universality is also caused; the air cylinder is used as a power source for testing, when the pressure resistance of furniture is unqualified, impact objects driven by the air cylinder are often broken in the testing process, the furniture cannot be automatically identified to be unqualified for detection and stop moving, so that secondary damage often occurs to a tested product, the repair difficulty of the unqualified tested product is increased, the rejection rate of the product is finally high, meanwhile, effective data support cannot be accurately provided for scientific research institutions, enterprises and the like, and the research and development cost and the production cost of the enterprises are increased.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a furniture impact testing machine, the impact device of which can adjust the testing height along with the lifting of the lifting beam, so that the testing machine can be suitable for testing various testing workpieces with different heights, and the universality is strong; the impact testing device is arranged to perform impact testing on the testing workpiece, and the lifting servo motor in the impact device can stop working immediately according to a pressure data signal sensed by the force value sensor so as to avoid the impact bag from punching the testing workpiece. The utility model discloses a realize through following technical scheme:

the utility model provides a furniture impact tester, includes the base, is provided with the lower margin below four angles of base respectively, is provided with mounting fixture above the base, and the test workpiece has been placed to mounting fixture's higher authority, and the left and right sides of base is provided with the stand respectively, is provided with a elevating system in every stand, controls two elevating system transverse connection and has the lift crossbeam, and the vertical impact device that installs in middle part of lift crossbeam. The top surface undercut of mounting fixture has the recess of certain degree of depth, and this recess is used for holding the foot or the truckle of test workpiece to the realization can carry out spacingly to test workpiece. The depth of the groove can be flexibly set according to different workpieces to be tested and is not limited to 1cm, 2cm, 3cm and the like.

Preferably, the impact device comprises an impact bag, the impact bag is internally provided with other counterweight objects such as a weight, a steel ball and sand, the weight and the steel ball are respectively provided with a plurality of the sand, the sand can weigh certain weight according to different test requirements, the upper surface of the impact bag is provided with a fixed disk, the upper surface of the middle part of the fixed disk is provided with a force value sensor, the upper surface of the force value sensor is provided with an electromagnetic chuck mounting plate, an electromagnetic chuck is mounted on the upper surface of the electromagnetic chuck mounting plate, an electric cylinder mounting plate is arranged above the electromagnetic chuck, the electric cylinder mounting plate is fixedly mounted on the upper surface of the lifting beam through a first screw, four corners of the electromagnetic chuck mounting plate and the electric cylinder mounting plate are respectively and vertically connected with connecting rods, the upper part of each connecting rod is sleeved with a buffer rubber, the electric cylinder fixing device is characterized in that a guide rod is arranged at the center of the electric cylinder fixing plate in a vertical penetrating mode, an electric cylinder is arranged on the guide rod, a floating joint is arranged below the guide rod and is installed below the middle of the electric cylinder fixing plate, a speed reducer is arranged above the electric cylinder, a lifting servo motor is arranged above the speed reducer, and an electromagnet block or a clutch is arranged below the floating joint.

Preferably, each lifting mechanism comprises a rotary servo motor, a driving wheel is arranged on the rotary servo motor, a driven wheel is arranged on one side of the driving wheel, the driving wheel and the driven wheel perform meshing motion, a driving shaft is arranged at the center of the vertically penetrating driven wheel, a coupling mounting frame is arranged above the driving shaft, the front end and the rear end of the coupling mounting frame are fixedly connected with the stand column through second screws, a coupling is installed in the coupling mounting frame, a lifting slider is arranged above the coupling mounting frame, a ball screw is arranged at the center of the vertically penetrating lifting slider, the upper end of the ball screw is connected with the stand column, the lower end of the ball screw is connected with the coupling, guide columns are respectively arranged on the front side and the rear side of the ball screw, the upper end of each guide.

Preferably, a guide sleeve is arranged at the contact position of each guide pillar and the lifting slide block.

Preferably, the lifting beam can be moved up and down by a lifting mechanism, and the impact device can be moved up and down by the lifting beam.

Preferably, two sliding grooves for the lifting beam to move up and down are vertically formed in one side, connected and mounted with the lifting beam, of each upright, and the end of the lifting beam penetrates through the sliding grooves and is fixedly connected with the lifting slide block through a third screw. The combined design of the sliding groove, the lifting mechanism and the lifting cross beam enables the lifting cross beam to be suitable for testing products with different heights, and the universality is high.

Preferably, the impact bag can be arranged as a wear-resistant and durable canvas bag according to the test requirements, but is not limited to the above. The shape of the punching bag can be, but is not limited to, a barrel shape according to the needs of the test. Strike the sack of bag upper end through making up the meshbelt with its and fixed disk fixed connection, be provided with cross support frame in the fixed disk, make the user can be according to the test workpiece of difference through the sack of assaulting the bag toward its in add or reduce the weight of corresponding weight, steel ball and grit, in order to realize changing the impact pressure who assaults the bag, make it realize being fit for the product to the difference, the product of different specifications or the product that test pressure requires the difference test, the commonality is strong, in order to solve when the tradition adopts the cylinder to test the workpiece as the power supply, the test pressure of cylinder is fixed nonadjustable problem.

Preferably, a through hole for the ball screw to penetrate through is formed in the middle of the lifting slider, an internal thread is formed in the inner wall of the through hole, the ball screw is rotatably connected with the through hole through an external thread of the ball screw, the movement principle of the lifting slider and the ball screw is the movement principle of the existing threaded screw and the threaded fixing seat (namely, the movement principle of the screw nut), the lifting slider can be rotatably connected with the external thread of the ball screw through the internal thread of the lifting slider, and therefore the ball screw can drive the lifting slider to perform lifting movement when rotating in the forward and reverse directions.

Preferably, a man-machine exchange interface is arranged on one side of one of the three bodies, a PLC (programmable logic controller) is arranged in the man-machine exchange interface, and the lifting mechanism and the impact device are respectively in control connection with the PLC. An operator can input various test parameters for controlling the motion of each part into the PLC through the man-machine exchange interface, for example, the number of times of impact required when the impact device is used for testing each test workpiece and the height of the lifting mechanism which is input and controlled to move up and down according to the heights of different products are input, so that the lifting mechanism and the impact device can be used with the PLC in a matched manner to accurately test the products, and the high measurement precision and the good test effect of the products are ensured. The specific structure and operation of the PLC controller are well known and will not be explained in detail herein. The PLC controller can adopt but is not limited to a programmable controller with the brand name VIGOR/Fengwu and the brand name 4586.

Preferably, the force value sensor is called a force sensor or a retransmission sensor, and the force value sensor can adopt but is not limited to a force value sensor with the brand of Kunlun coast and the model of BK-2Y. The lifting servo motor can adopt but is not limited to a servo motor with the brand of Haider and the model of ACSM110-G04030 LZ; the rotary servo motor can adopt but is not limited to a rotary motor with the brand name of Nanjiang and the model number of 200w1: 200. The lifting servo motor and the rotating motor are respectively electrically connected with the mains supply through electric wires.

When adopting this article to test office chair or sofa, can pack into a plurality of weights in the impact bag, other counter weight objects such as a plurality of steel balls or the grit of a basis weight, as preferred, it is a plurality of steel balls to pack into in the impact bag, can also be equipped with the slide rail on the top surface of base, it can carry out spacing limiting plate to the left and right sides of furniture such as office chair or sofa to slide vertical being provided with on the slide rail, the combined design of slide rail and limiting plate enables its test work piece that is fit for different specifications to carry out spacingly, it is provided with a plurality of spacing hole respectively through one side or front and back both sides at the slide rail again, operating personnel can fix the equipment with spacing hole through the fourth screw with the limiting plate, make the limiting plate adjust to suitable position on the slide rail and can fix spacingly to office chair's the left and right sides after fourth screw. The limiting plate is arranged in an L shape or an L shape which is vertical mirror image when viewed from the front.

When the table bearing capacity is tested by adopting the product, sand is preferably filled in the impact bag, an operator needs to set the descending speed of the lifting servo motor through the PLC controller, so that the lifting servo motor can slowly descend to a standard required loading point of the table top, when the lifting servo motor is controlled by the PLC controller to repeatedly descend to the standard loading point of the table top at a slow speed within set times (such as 2000 times, 3000 times and the like), the table bearing capacity is tested by using the weight of the impact bag filled with the sand, and when a force value sensor senses that pressure values at the standard loading point are all 0 within the set times, the table bearing capacity, the firmness or the hardness are tested to be qualified; when the lifting servo motor repeatedly falls to the standard loading point of the desktop at a slow speed within the set times (such as 2000 times, 3000 times and the like) under the control command of the PLC, when the force value sensor senses that the pressure value at the standard loading point is greater than 0 within the set times for the first time, the firmness or hardness difference of the desk is represented, the sinking phenomenon of the desk occurs, the desk is unqualified in test, at the moment, the force value sensor can send the sensed signal to the PLC, the PLC receives the signal and then controls the lifting servo motor to stop working at once, so that the secondary damage to the desktop is avoided.

The utility model discloses a furniture impact tester, including base, lower margin, mounting fixture, stand, elevating system, lifting beam and impact device, impact device is including strikeing bag, weight or steel ball or grit, fixed disk, force value sensor, electromagnet mounting panel, electromagnet, electromagnetism iron plate or clutch, electricity jar mounting panel, connecting rod, cushion gum, connecting block, buffer, guide arm, electricity jar, unsteady joint, speed reducer and lift servo motor. The workpiece to be tested of the utility model is explained by taking an office chair as an example, firstly, the office chair is placed on the base, and the plurality of fixing clamps are arranged on the base and can accommodate five truckles of the office chair, so that the fixing clamps can limit the five truckles of the office chair to prevent the movement or the sliding of the truckles; when the rotary servo motor in each upright post starts to rotate in the forward and reverse directions, the rotary servo motor can drive the driving wheel connected with the rotary servo motor to rotate in the forward and reverse directions, the driving wheel rotating in the forward and reverse directions can drive the driven wheel to rotate in the forward and reverse directions, the driven wheel can drive the driving shaft to rotate in the forward and reverse directions, the driving shaft rotating in the forward and reverse directions can drive the ball screw to rotate in the forward and reverse directions through the coupler, and the ball screw rotating in the forward and reverse directions can drive the lifting slide block to move up and down, so that the lifting beam fixedly connected with the lifting slide block can move up and down along with the lifting slide block; when the ball screw rotates forwards, the ball screw can drive the lifting slide block to do descending motion, and the descending motion lifting slide block can drive the lifting cross beam to descend along with the descending motion of the lifting cross beam, so that the lifting cross beam can downwards adjust the height of the lifting cross beam; when the ball screw rotates reversely, the ball screw can drive the lifting slide block to move upwards, the lifting slide block which moves upwards can drive the lifting cross beam to lift along with the lifting cross beam, so that the lifting cross beam can adjust the height of the lifting cross beam upwards, the impact device can flexibly adjust the test height of the testing work piece along with the lifting cross beam according to different heights of the testing work piece and under the driving of the lifting mechanism, and even if the impact device is realized, the impact device can be suitable for testing various testing work pieces with different heights, so that the problem that the existing air cylinder which is used as a power source cannot be suitable for testing the work pieces with different specifications and different heights due to the fact that the test height of the air cylinder cannot be adjusted is solved; because the initial position of the impact bag is placed on the upper surface of the test workpiece, the pressure sensed by the force value sensor is 0, and after the impact bag is placed on the upper surface of the test workpiece, an operator controls the lifting mechanism to operate through the man-machine exchange interface, so that the lifting beam can be positioned to the proper height required by workpiece testing after moving up and down along with the lifting mechanism; when a lifting servo motor in the impact device is started, the lifting servo motor can drive an electric cylinder to perform lifting motion sequentially through a speed reducer, the electric cylinder performing the lifting motion can drive a guide rod connected with the electric cylinder to perform the lifting motion, and the guide rod performing the lifting motion can drive a floating joint connected with the guide rod to perform the lifting motion along with the guide rod, so that a clutch or an electromagnet block can perform the lifting motion along with the motion of the floating joint; when the lifting servo motor drives the clutch or the electromagnet block to descend to the upper surface of the electromagnetic chuck sequentially through the speed reducer, the electric cylinder, the guide rod and the floating joint, the electromagnetic chuck can be attracted together with the electromagnet block or the clutch, when the lifting servo motor drives the electromagnet block or the clutch to reset and ascend sequentially through the speed reducer, the electric cylinder, the guide rod and the floating joint, the electromagnet block or the clutch can attract the electromagnetic chuck by utilizing the principle of magnetic attraction, the electromagnetic chuck can ascend along with the ascending of the electromagnet block or the clutch, the electromagnetic chuck can drive the impact bag to ascend along with the ascending of the impact bag, in the process that the impact bag ascends along with the impact bag, the impact bag can generate a pulling force for pulling the electromagnetic chuck downwards under the influence of the gravity of a weight arranged in the impact bag, and when the pulling force is larger than the force between the electromagnet block or the clutch and the electromagnetic chuck, the electromagnetic chuck can be separated from the electromagnet block or the clutch, the impact bag falls back to the surface of the test workpiece along with the separation of the electromagnetic chuck, after the electromagnet block or the clutch reciprocates N times of lifting motion along with the floating joint, the guide rod, the electric cylinder and the speed reducer under the driving of the lifting servo motor in sequence, N times refer to the times of impact required when the test workpiece is a qualified product, such as 2000 times, 3000 times and the like, and whether the product is a qualified product is tested by utilizing the impact force generated when the impact bag falls back to the surface of the test workpiece repeatedly for N times, and when the pressure value sensed by the force value sensor is 0 in the process that the impact bag falls back to the surface of the test workpiece for N times, the test workpiece is a qualified product; when the force value sensor senses that the pressure value is greater than 0 for the first time in the process that the impact bag falls back to the surface of the test workpiece for a plurality of times, the surface of the impact bag is damaged, the pressure resistance test of the impact bag is unqualified, the impact bag is an unqualified product, at the moment, the force value sensor can automatically send the sensed information to the PLC controller, the PLC controller receives the signal transmitted from the force value sensor and then controls the lifting servo motor to stop operating immediately, so that the test workpiece is prevented from being influenced by the falling impact force of the impact bag to cause secondary damage of the test workpiece, the problem that the work cannot be automatically stopped even if the test workpiece is damaged by using the air cylinder as a power source in the prior art is effectively solved, the rejection rate of the product is effectively reduced, the test precision is high, the test effect is good, the operation flexibility is strong, and the use.

Drawings

For the purpose of illustration, the invention is described in detail with reference to the following preferred embodiments and the accompanying drawings.

Fig. 1 is a perspective view of the furniture impact tester of the present invention.

Fig. 2 is a perspective view of an impact device of the furniture impact testing machine of the present invention.

Fig. 3 is a perspective view of the lifting mechanism of the furniture impact testing machine of the present invention.

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.

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.

In this embodiment, as shown in fig. 1 to 3, the utility model discloses a furniture impact tester, including base 1, be provided with lower margin 2 below four angles of base 1 respectively, base 1's higher authority is provided with and carries out spacing mounting fixture 3 to the work piece of placing above that it is face, test workpiece 4 has been placed to mounting fixture 3's higher authority, base 1's the left and right sides is provided with stand 5 respectively, be provided with an elevating system 6 in every stand 5, control two elevating system 6 transverse connection and have lifting beam 7, lifting beam 7's middle part vertical installation has can carry out impact test's impulsive unit 8 to test workpiece 4.

In one embodiment, the impact device 8 includes an impact bag 81, a plurality of weights, a plurality of steel balls, or sand with a certain weight and other counterweight objects can be loaded in the impact bag 81 according to different test gravities, a fixed disk 82 is disposed on the impact bag 81, a force sensor 83 is disposed on the middle portion of the fixed disk 82, an electromagnetic chuck mounting plate 84 is disposed on the force sensor 83, an electromagnetic chuck 85 is mounted on the electromagnetic chuck mounting plate 84, an electric cylinder mounting plate 86 is disposed above the electromagnetic chuck 85, the electric cylinder mounting plate 86 is fixedly mounted on the lifting beam 7 through a first screw, four corners of the electromagnetic chuck mounting plate 84 and the electric cylinder mounting plate 86 are respectively and vertically connected with connecting rods 87, a buffer rubber 88 is sleeved on the upper portion of each connecting rod 87, the buffer rubber 88 is arranged in a hollow cylindrical shape, and the top ends of two connecting rods 87 on the same side are connected with a, the middle part of connecting block 89 is provided with buffer 891, the center that runs through electricity jar mounting panel 86 perpendicularly is provided with guide arm 892, the higher authority of guide arm 892 is provided with electricity jar 893, the lower face of guide arm 892 is provided with floating joint 894, and floating joint 894 installs the lower face in the middle part of electricity jar mounting panel 86, the higher authority of electricity jar 893 is provided with speed reducer 895, the higher authority of speed reducer 895 is provided with lift servo motor 896, the lower face of floating joint 894 is provided with clutch or magnet piece 80.

In one embodiment, each of the lifting mechanisms 6 comprises a rotary servo motor 60, a driving wheel 61 is arranged on the rotary servo motor 60, a driven wheel 62 is arranged on one side of the driving wheel 61, the driving wheel 61 and the driven wheel 62 perform meshing motion, a driving shaft 63 is arranged vertically penetrating through the center of the driven wheel 62, a coupler mounting frame 64 is arranged above the driving shaft 63, the front end and the rear end of the coupler mounting frame 64 are respectively fixedly connected with the upright post 5 through second screws, a coupler 65 is arranged in the coupler mounting frame 64, a lifting slider 66 is arranged above the coupler mounting frame 64, a ball screw 67 is arranged vertically penetrating through the center of the lifting slider 66, the upper end of the ball screw 67 is connected with the upright post 5, the lower end of the ball screw 67 is connected with the coupler 65, guide posts 68 are respectively arranged on the front side and the rear side of the, the lower end of each guide post 68 is connected to the coupler mounting bracket 64.

In one embodiment, a guide sleeve 69 is installed at the contact position of each guide post 68 and the lifting slider 66.

In one embodiment, the lifting beam 7 can be moved up and down by means of the lifting mechanism 6, and the impact device 8 can be moved up and down by means of the lifting beam 7.

In one embodiment, two sliding grooves 51 for the up-and-down movement of the lifting beam 7 are vertically arranged on one side of each upright post 5 connected with the lifting beam 7, and the end of the lifting beam 7 passes through the sliding grooves 51 to be fixedly connected with a lifting slider 66.

In one embodiment, the furniture impact tester is described by taking a test office chair as an example, and the operation flow is as follows: firstly, an office chair (a test workpiece 4) is placed on a base 1, a plurality of fixing clamps 3 are arranged on the base 1, the plurality of fixing clamps 3 can accommodate five casters of the office chair in the office chair, and the plurality of fixing clamps 3 can limit the five casters of the office chair so as to prevent the office chair from moving or sliding in the test process; when the rotary servo motor 60 in each upright post 5 is started to rotate in the forward and reverse directions, the rotary servo motor 60 can drive the driving wheel 61 connected with the rotary servo motor to rotate in the forward and reverse directions, the driving wheel 61 rotating in the forward and reverse directions can drive the driven wheel 62 to rotate in the forward and reverse directions, the driven wheel 62 can drive the driving shaft 63 to rotate in the forward and reverse directions when rotating in the forward and reverse directions, the driving shaft 63 rotating in the forward and reverse directions can drive the ball screw 67 to rotate in the forward and reverse directions through the coupler 65, and the ball screw 67 rotating in the forward and reverse directions can drive the lifting slide block 66 to move up and down, so that the lifting beam 7 fixedly connected with the lifting slide block 66 can move up and down along with the lifting; when the ball screw 67 rotates forwards, the ball screw 67 can drive the lifting slide block 66 to do descending motion, and the descending slide block 66 which does descending motion can drive the lifting beam 7 to descend along with the descending slide block, so that the lifting beam 7 can downwards adjust the height of the lifting beam; when the ball screw 67 rotates reversely, the ball screw 67 can drive the lifting slide block 66 to do lifting motion, the lifting slide block 66 which does lifting motion can drive the lifting beam 7 to lift along with the lifting beam 7, so that the lifting beam 7 can adjust the height of the lifting beam upwards, the impact device 8 can flexibly adjust the test height of the testing workpiece 4 according to different heights of the testing workpiece 4 along with the lifting beam 7 and under the driving of the lifting mechanism 6, and even if the testing workpiece 4 can be tested in different heights, the testing device can be suitable for testing the testing workpieces 4 with different heights, so that the problem that the testing workpiece with different specifications and different heights cannot be tested due to the fact that the testing height of the testing workpiece cannot be adjusted by adopting an air cylinder as a power source at present is solved, and the; the initial position of the impact bag 81 is placed on the surface of the test workpiece 4, at the moment, the pressure sensed by the force value sensor 83 is 0, and after the impact bag 81 is placed on the upper surface of the test workpiece 4, an operator controls the lifting mechanism 6 to operate through a man-machine exchange interface, so that the lifting beam 7 can be positioned to a proper height required by workpiece testing after moving up and down along with the lifting mechanism 6; when the lifting servo motor 896 in the impact device 8 is started, the lifting servo motor 896 can drive the electric cylinder 893 to move up and down sequentially through the speed reducer 895, the electric cylinder 893 to move up and down can drive the guide rod 892 connected with the electric cylinder to move up and down, and the guide rod 892 to move up and down can drive the floating joint 894 connected with the guide rod to move up and down accordingly, so that the electromagnet block 80 can move up and down along with the movement of the floating joint 894; when the lifting servo motor 896 drives the electromagnet block 80 to descend to the upper surface of the electromagnet block 85 through the speed reducer 895, the electric cylinder 893, the guide rod 892 and the floating joint 894 in sequence, at this time, the electromagnet block 85 can be magnetically attracted together with the electromagnet block 80, when the lifting servo motor 896 drives the electromagnet block 80 to return to ascend through the speed reducer 895, the electric cylinder 893, the guide rod 892 and the floating joint 894 in sequence, the electromagnet block 80 can attract the electromagnet block 85 by using the principle of magnetic attraction, and the electromagnet block 85 can ascend along with the ascent of the electromagnet block 80, and the electromagnet block 85 can drive the impact bag 81 to ascend along with the ascending of the impact bag 81, and in the process of ascending of the impact bag 81, the impact bag 81 can generate a pulling force for pulling the electromagnet block 85 downwards due to the influence of the weight gravity, when the pulling force is larger than the magnetic attraction force between the electromagnet block 80 and the electromagnet block 85, the electromagnet 85 is separated from the electromagnet block 80, so that the impact bag 81 falls back to the surface of the test workpiece 4 along with the separation of the electromagnet 85, after the electromagnet block 80 reciprocates for N times along with the floating joint 894, the guide rod 892, the electric cylinder 893 and the speed reducer 895 under the driving of the lifting servo motor 896, wherein N times are the times of impact required when the test workpiece 4 is a qualified product, such as 2000 times, 3000 times and the like, the impact bag 81 is used for testing whether the product is a qualified product by the impact force generated by the impact bag 81 reciprocating through the N times of falling back to the surface of the test workpiece 4, and when the impact bag 81 finishes the N times of falling back to the surface of the test workpiece 4, the pressure value sensed by the force value sensor 83 is 0, the test workpiece 4 is a qualified product; when the force value sensor 83 senses that the pressure value is greater than 0 for the first time in the process that the impact bag 81 falls back to the surface of the test workpiece 4 for a plurality of times, the surface of the impact bag 81 is damaged, the pressure resistance test of the impact bag is unqualified, and the impact bag is an unqualified product, at the moment, the force value sensor 83 automatically sends the sensed information to the PLC controller, and the PLC controller receives the signal transmitted from the force value sensor 83 and then controls the lifting servo motor 896 to stop operating immediately, so that the test workpiece 4 is prevented from being influenced by the impact force of the falling impact bag 81 to cause secondary damage of the test workpiece 4, the rejection rate of the product is effectively reduced, the test precision is high, the test effect is good, the operation flexibility is strong, and the use is more convenient and rapid.

The utility model discloses a furniture impact tester, it is through with base, lower margin, mounting fixture, stand, lifting beam, strike bag, weight or steel ball or grit, fixed disk, force value sensor, electromagnet mounting panel, electromagnet piece or clutch, electric cylinder mounting panel, connecting rod, cushion rubber, connecting block, buffer, guide arm, electric cylinder, floating joint, speed reducer and lift servo motor etc. combined use, make lifting beam can go up and down to adjust through the elevating system that is located in the stand, thereby make the impact device can adjust its test height along with lifting beam's lift, make it realize and can be fit for testing various not high test work pieces, the commonality is strong; the impact testing device is further provided with an impact device to perform impact testing on a testing workpiece, when a force value sensor in the impact device repeatedly falls for multiple times within the testing times set by an impact bag to impact the surface of the testing workpiece, and the pressure is sensed for the first time to be greater than 0, a lifting servo motor in the impact device can stop working immediately according to a signal sensed by the force value sensor so as to avoid the impact bag from punching out the testing workpiece, the problem that when a cylinder is used as a power source to test the workpiece in the prior art, the testing height of the cylinder cannot be adjusted and the testing pressure cannot be adjusted is effectively solved, and the problem that the cylinder cannot stop moving after the testing workpiece is damaged is also solved.

The above-mentioned embodiments are merely examples of the present invention, and are not intended to limit the scope of the invention, which is defined by the claims and the equivalents of the principles and basic structures of the invention.

Claims

1. A furniture impact tester is characterized in that: the device comprises a base, wherein lower feet are respectively arranged below four corners of the base, a fixed clamp is arranged above the base, a test workpiece is placed on the fixed clamp, stand columns are respectively arranged on the left side and the right side of the base, a lifting mechanism is arranged in each stand column, the left lifting mechanism and the right lifting mechanism are transversely connected with a lifting cross beam, and an impact device is vertically arranged in the middle of each lifting cross beam; the impact device comprises an impact bag, one of a weight, a steel ball and sand is arranged in the impact bag, the weight and the steel ball are respectively provided with a plurality of weights, a fixed disc is arranged on the upper surface of the impact bag, a force value sensor is arranged on the upper surface of the middle part of the fixed disc, an electromagnetic chuck mounting plate is arranged on the upper surface of the force value sensor, an electromagnetic chuck is arranged on the upper surface of the electromagnetic chuck mounting plate, an electric cylinder mounting plate is arranged above the electromagnetic chuck, the electric cylinder mounting plate is fixedly mounted on the upper surface of the lifting beam through a first screw, connecting rods are respectively and vertically connected with four corners of the electromagnetic chuck mounting plate and the electric cylinder mounting plate, the upper part of each connecting rod is sleeved with a buffer glue, the top ends of two connecting rods on the same side are connected with a connecting block, a buffer is arranged, and the floating joint is arranged below the middle part of the electric cylinder mounting plate, the speed reducer is arranged above the electric cylinder, the lifting servo motor is arranged above the speed reducer, and the electromagnet block or the clutch is arranged below the floating joint.

2. The furniture impact tester of claim 1, wherein: every elevating system includes rotatory servo motor, the higher authority of rotatory servo motor is provided with the action wheel, one side of action wheel is provided with from the driving wheel, action wheel and driven round do the meshing motion, the center of running through perpendicularly from the driving wheel is provided with the driving shaft, the top of driving shaft is provided with the shaft coupling mounting bracket, both ends are connected fixedly with the stand through the second screw around the shaft coupling mounting bracket, install the shaft coupling in the shaft coupling mounting bracket, the top of shaft coupling mounting bracket is provided with the lifting slide, the center of running through the lifting slide perpendicularly is provided with ball screw, ball screw's upper end and stand are connected, ball screw's lower extreme and coupling joint, ball screw's front and back both sides are provided with the guide pillar respectively, the upper end and the stand.

3. The furniture impact tester of claim 2, wherein: and a guide sleeve is arranged at the contact part of each guide post and the lifting slide block.

4. The furniture impact tester of claim 1, wherein: the lifting beam can perform lifting motion through the lifting mechanism, and the impact device can perform lifting motion through the lifting beam.

5. The furniture impact tester of claim 1, wherein: each upright post is vertically provided with two sliding grooves for the lifting beam to move up and down on one side of the lifting beam, and the end part of the lifting beam penetrates through the sliding grooves to be fixedly connected with the lifting slide block.