CN211085968U - Fatigue test device for mechanical parts - Google Patents

Abstract

The utility model provides a fatigue test device of mechanical parts, one end position of the upper surface of the bottom plate is fixed with a welding machine case, two slide ways are arranged in parallel on the upper surface of the bottom plate, the utility model can generate alternating torque, the test efficiency is high, torque can be exerted, the application range is wide, the rotating motion of the first screw rod can be converted into vertical motion through the screw thread matching of the first screw rod and the first screw hole, the structure is simple, the maintenance is easy, the test piece is pressed through the contact of the frustum at the lower end of the first screw rod and the test piece, the operation is convenient, the fixation is firm, the test piece is locked in the horizontal direction through the approach of the third screw rod and the arc plate or the distance from the test piece, the force received by the fixed shifting piece after locking can be converted into the torque received by the test piece, the fixation is firm, the operation is simple, energy is saved, the times of the strain torque received, and data are transmitted to the single chip microcomputer, the intelligent degree is high, and the testing quality is good.

Description

Fatigue test device for mechanical parts

Technical Field

The utility model belongs to the technical field of fatigue test and specifically relates to a machine part's fatigue test device is related to.

Background

Fatigue failure is mainly caused by fatigue stress, the fatigue stress is the resistance of materials, parts and structural parts to fatigue failure, under a specified cyclic stress amplitude and a large number of repetition times, the maximum alternating stress which can be borne by the materials is one of the main reasons for the failure of the mechanical parts, according to statistics, more than 80% of the failure of the mechanical parts belongs to the fatigue failure, and no obvious deformation exists before the fatigue failure, so the fatigue failure often causes major accidents, and in the mechanical parts, the parts which bear alternating torque, such as shafts, gears, bearings, and the like, are most easily damaged; compared with the Chinese patent with the application number of 201621469694.4, the fatigue testing device for the mechanical parts comprises a base, an impact arm, a driving device and an object to be tested fixing component; although this patent can test mechanical part's fatigue resistance, can only apply pressure for the part, can't apply the alternating torque, have very big limitation on using, and the rotatory a week of motor, can only apply once power, and efficiency of software testing is very low, need drive at every turn and hit a rebound, energy loss is big, can't measure alternating force size and the number of times of applying, and fixed use is inconvenient, and the structure is complicated, is unfavorable for maintaining the maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, a machine part's fatigue test device is provided, can apply the alternating moment of torsion for the test part, and application scope is wide, and efficiency of software testing is high, and energy loss is little, and is longe-lived, and intelligent degree is high, and convenient operation can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the utility model provides a machine part's fatigue test device, the one end of bottom plate upper surface is fixed with the welding machine case, two slides have been seted up to the last parallel surface of bottom plate, sliding connection has the movable machine case on two slides, the last surface mounting of welding machine case has vertical fastening device, be fixed with the test piece on the vertical fastening device, the side of test piece is fixed with horizontal fastening device, the last surface mounting of movable machine case has power unit, connect through the motion between welding machine case and the movable machine case, the side-mounting of welding machine case has the singlechip, the input of singlechip is connected with external power source's output electricity, the output of singlechip is connected with power unit and motion's input electricity.

In foretell machine part's fatigue test device, vertical fastening device includes the fixed plate, the fixed plate welding is on the welding machine case, the one end welding that movable machine case 4 was kept away from to the upper surface of fixed plate 6 has ridge 7, the top welding of ridge has the roof, first screw hole has been seted up on the roof, threaded connection has first screw rod on the first screw hole, the top of first screw rod is fixed with first fastening dish, the bottom mounting of first screw rod has the frustum, the upper surface of fixed plate is located the below of frustum and is provided with the test piece.

In foretell machine part's fatigue test device, horizontal fastening device is including linking the board, and the both ends of linking the board are fixed with the mounting plate respectively, and the side of keeping away from the test piece even board is fixed with decides the plectrum, and threaded connection has the third screw rod on the mounting plate, and the one end that the third screw rod is close to the test piece is connected with the arc through the bearing, and the one end that the test piece was kept away from to the third screw rod is fixed with the second fastening dish.

In foretell machine part's fatigue test device, power unit includes the motor groove, the motor groove is seted up on movable machine case, and run through its upper surface, servo motor is installed to the motor inslot, servo motor's output shaft has the pivot through the coupling joint, be fixed with the carousel on the top side of pivot, the draw-in groove has been seted up on the carousel, sliding connection has the transfer piece in the draw-in groove, the transfer piece is made by flexible material, the one end that the transfer piece is close to the draw-in groove is fixed with the cardboard, servo motor's input is connected with the output electricity of singlechip.

In foretell machine part's fatigue test device, the motion includes the mounting groove, the mounting groove is seted up on the welding machine case, run through the side that the welding machine case is close to movable machine case, the last fixed surface of mounting groove has the mounting panel, install step motor on the mounting panel, step motor's output shaft has the second screw rod through the coupling joint, the second screw hole that corresponds with the second screw rod is seted up on the movable machine case, the other end and the second screw hole threaded connection of second screw rod, step motor's input is connected with the output electricity of singlechip.

In the fatigue testing device for the mechanical parts, the counter is mounted on the side surface of the rotating shaft and fixed on the upper surface of the movable case, and the output end of the counter is electrically connected with the input end of the single chip microcomputer.

By adopting the technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses machine part's fatigue test device of example can make movable machine case slide on the bottom plate through the slide, it is convenient to remove, long-lived, produce the dependent stress through single chip microcomputer control power unit, single chip microcomputer control motion draws close the distance between welding machine case and the movable machine case, power unit transmits the dependent stress for horizontal fastening device, horizontal fastening device changes the dependent stress into the moment of torsion of meeting an emergency and applys on the test piece, carry out anti fatigue test, the efficiency of software testing is high, can apply the moment of torsion, application range is wide.

2. The utility model discloses machine part's fatigue test device of example, the screw-thread fit through first screw rod and first screw hole can change the rotary motion of first screw rod into vertical motion, simple structure, and easy to maintain maintains through the first fastening dish of rotating, drives first screw rod downstream, and the frustum of first screw rod lower extreme and test piece contact compress tightly the test piece, and convenient operation is fixed firm.

3. The utility model discloses machine part's fatigue test device of example, through rotating second fastening disc, can drive third screw rod and arc and be close to the test piece or keep away from the test piece, will test the piece at the locking of horizontal direction, the moment of torsion that the test piece received can be changed into to the power that the plectrum received after the locking, and is fixed firm, easy operation, the energy can be saved.

4. The utility model discloses machine part's fatigue test device, the thickness through adjusting the commentaries on classics plectrum or the distance that changes welding machine case and activity machine case can adjust the straining force, and the test is accurate, and efficiency of software testing is high, and energy loss is little, can make statistics of the number of times of the strain moment of torsion that the test piece receives through the counter to send data to the singlechip, intelligent degree is high, and test quality is good.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic side sectional view of a fixing plate according to the present invention;

fig. 3 is a front sectional view of the present invention.

Wherein: the device comprises a base plate 1, a slideway 2, a welded case 3, a movable case 4, a singlechip 5, a fixing plate 6, a ridge plate 7, a top plate 8, a first screw rod 9, a first fastening disc 10, a first threaded hole 11, a test piece 12, a frustum 13, a connecting plate 14, a fixed shifting piece 15, a clamping plate 16, a clamping groove 17, a shifting piece 18, a rotating disc 19, a stepping motor 20, a mounting groove 21, a mounting plate 22, a second screw rod 23, a second threaded hole 24, a servo motor 25, a motor groove 26, a counter 27, a fastening plate 28, a second fastening disc 29, a third screw rod 30, an arc plate 31, a rotating shaft 32, a longitudinal fastening mechanism 33, a power mechanism 34, a transverse fastening mechanism 35 and a motion mechanism 36.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a fatigue testing device for mechanical parts is characterized in that a welding case 3 is fixed at one end of the upper surface of a bottom plate 1, two slide ways 2 are arranged on the upper surface of the bottom plate 1 in parallel, the slide ways 2 can enable a movable case 4 to slide on the bottom plate 1, the movable case 4 is connected on the two slide ways 2 in a sliding manner, a longitudinal fastening mechanism 33 is installed on the upper surface of the welding case 3, the longitudinal fastening mechanism 33 can lock a test piece 12 in the vertical direction, the longitudinal fastening mechanism 33 is fixed with the test piece 12, the lateral side of the test piece 12 is fixed with a transverse fastening mechanism 35, the transverse fastening mechanism 35 can lock the test piece 12 in the horizontal direction, a power mechanism 34 is installed on the upper surface of the movable case 4, the power mechanism 34 can rapidly output strain force, the welding case 3 is connected with the movable case 4 through a motion mechanism 36, and the motion mechanism 36 can drive the movable case 4 to horizontally move, the single-chip microcomputer 5 is installed on the side face of the welding case 3, the input end of the single-chip microcomputer 5 is electrically connected with the output end of an external power supply, the output end of the single-chip microcomputer 5 is electrically connected with the input ends of the power mechanism 34 and the moving mechanism 36, the single-chip microcomputer 5 starts the power mechanism 34 to generate a strain force, the single-chip microcomputer 5 controls the moving mechanism 36 to be close to the distance between the welding case 3 and the movable case 4, the power mechanism 34 transmits the strain force to the transverse fastening mechanism 35, and the transverse fastening mechanism 35 converts the strain force into a strain torque to be applied to.

Further, the longitudinal fastening mechanism 33 comprises a fixing plate 6, the fixing plate 6 is welded on the welding machine case 3, one end of the upper surface of the fixing plate 6, which is far away from the movable machine case 4, is welded with a ridge plate 7, the top end of the ridge plate 7 is welded with a top plate 8, the top plate 8 is provided with a first threaded hole 11, the first threaded hole 11 is in threaded connection with a first screw 9, can change the rotary motion of first screw rod 9 into vertical motion through the screw-thread fit of first screw rod 9 and first screw hole 11, the top of first screw rod 9 is fixed with first fastening dish 10, the bottom mounting of first screw rod 9 has frustum 13, the below that the upper surface of fixed plate 6 is located frustum 13 is provided with test piece 12, the first fastening dish 10 of rotating drives first screw rod 9 and moves down, frustum 13 and the test piece 12 contact of first screw rod 9 lower extreme, compress tightly test piece 12, and convenient for operation, it is fixed firm.

Further, horizontal fastening device 35 includes even board 14, the both ends of even board 14 are fixed with fastening plate 28 respectively, the side that even board 14 kept away from test piece 12 is fixed with decides plectrum 15, threaded connection has third screw rod 30 on fastening plate 28, the one end that third screw rod 30 is close to test piece 12 is connected with arc 31 through the bearing, the one end that third screw rod 30 kept away from test piece 12 is fixed with second fastening disc 29, through rotating second fastening disc 29, can drive third screw rod 30 and arc 31 and be close to test piece 12 or keep away from test piece 12, with test piece 12 locking in the horizontal direction, the moment of torsion that test piece 12 received can be changed into to the power that decides plectrum 15 and receive after the locking.

Further, power unit 34 includes motor groove 26, motor groove 26 is seted up on movable chassis 4, and run through its upper surface, install servo motor 25 in the motor groove 26, servo motor 25's output shaft has pivot 32 through the coupling joint, be fixed with carousel 19 on the top side of pivot 32, draw-in groove 17 has been seted up on the carousel 19, sliding connection has the poking piece 18 in draw-in groove 17, poking piece 18 is made by flexible material, the one end that poking piece 18 is close to draw-in groove 17 is fixed with cardboard 16, can be with the joint of poking piece 18 on carousel 19 through cardboard 16, the loading and unloading is convenient, moreover, the operation is simple, servo motor 25's input is connected with singlechip 5's output electricity, singlechip 5 control servo motor 25 starts, servo motor 25 drives carousel 19 through pivot 32 and rotates, carousel 19 drives poking piece 18 and rotates.

Further, the moving mechanism 36 includes a mounting groove 21, the mounting groove 21 is disposed on the welding machine case 3, and penetrates through the side surface of the welding machine case 3 close to the movable machine case 4, a mounting plate 22 is fixed on the upper surface of the mounting groove 21, a stepping motor 20 is mounted on the mounting plate 22, an output shaft of the stepping motor 20 is connected with a second screw 23 through a coupling, a second threaded hole 24 corresponding to the second screw 23 is disposed on the movable machine case 4, the other end of the second screw 23 is in threaded connection with the second threaded hole 24, an input end of the stepping motor 20 is electrically connected with an output end of the single chip microcomputer 5, the single chip microcomputer 5 controls the stepping motor 20 to start, the stepping motor 20 drives the second screw 23 to rotate for a certain number of turns, the second screw 23 and the second threaded hole 24 are in threaded fit to convert the rotation of the second screw 23 into the horizontal movement of the movable machine, the rotary shifting piece 18 collides with the fixed shifting piece 15, the rotary shifting piece 18 is bent and staggered with the fixed shifting piece 15, horizontal force stress can be applied to the fixed shifting piece 15, the fixed shifting piece 15 converts the horizontal stress into torque to be applied to the test piece 12, and the strain force can be adjusted by adjusting the thickness of the rotary shifting piece 18 or changing the distance between the welding case 3 and the movable case 4.

Furthermore, counter 27 is installed to the side of pivot 32, and counter 27 is fixed at the upper surface of activity machine case 4, and the output of counter 27 is connected with the input electricity of singlechip 5, can count the number of times of the strain torque that test piece 12 receives through counter 27 to give singlechip 5 with data transfer, intelligent degree is high, and test quality is good.

The type of the singlechip 5 is MSC-51, and the modes of controlling the stepping motor 20, the servo motor 25 and the counter 27 by the singlechip 5 are all common methods in the prior art.

The utility model discloses in step motor 20, servo motor 25 and counter 27 etc. that use be the electronic component commonly used among the prior art, and its working method and circuit structure are the well-known technology, do not describe herein again.

When in use: the staff places the test piece 12 below the frustum 13, make the centre of a circle of the test piece 12 align with the first screw 9 as far as possible, then rotate the first fastening disk 10, the first fastening disk 10 drives the first screw 9 to move downwards, the frustum 13 of the lower end of the first screw 9 contacts with the test piece 12, compress the test piece 12 in the vertical direction, through rotating the second fastening disk 29, the second fastening disk 29 makes the third screw 30 drive the arc 31 to approach the test piece 12 or keep away from the test piece 12, lock the test piece 12 in the horizontal direction, later through the cardboard 16 will shift the piece 18 joint on the rotary table 19, the singlechip 5 controls the servo motor 25 to start, the servo motor 25 drives the rotary table 19 to rotate through the pivot 32, the rotary table 19 drives the shift piece 18 to rotate, finally the singlechip 5 controls the stepper motor 20 to start, the stepper motor 20 drives the second screw 23 to rotate a certain number of turns, the second screw 23 and the second screwed hole 24 can convert the rotation of the second screw 23 into the movable chassis through the screw cooperation of screw 23 4, when the movable case 4 is close to the welding case 3, the rotating shifting piece 18 collides with the fixed shifting piece 15, the rotating shifting piece 18 bends and is staggered with the fixed shifting piece 15, namely, the horizontal force stress can be applied to the fixed shifting piece 15, the fixed shifting piece 15 converts the horizontal stress into a torque to be applied to the test piece 12, the fatigue test is carried out, the times of the strain torque applied to the test piece 12 can be counted through the counter 27, and data are transmitted to the single chip microcomputer 5.

The utility model discloses can apply the reversal moment of torsion for the test part, application scope is wide, and efficiency of software testing is high, and energy loss is little, and is longe-lived, and intelligent degree is high, convenient operation.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a machine part's fatigue test device, includes bottom plate (1), welding machine case (3) and activity machine case (4), its characterized in that: the one end of bottom plate (1) upper surface is fixed with welding machine case (3), two slides (2) have been seted up to the upper surface parallel of bottom plate (1), sliding connection has movable machine case (4) on two slides (2), the last surface mounting of welding machine case (3) has vertical fastening device (33), be fixed with test piece (12) on vertical fastening device (33), the side of test piece (12) is fixed with horizontal fastening device (35), the last surface mounting of movable machine case (4) has power unit (34), connect through motion (36) between welding machine case (3) and the movable machine case (4), the side-mounting of welding machine case (3) has singlechip (5), the input of singlechip (5) is connected with external power source's output electricity, the output of singlechip (5) is connected with the input electricity of power unit (34) and motion (36).

2. The fatigue testing device for mechanical parts according to claim 1, wherein: vertical fastening device (33) is including fixed plate (6), fixed plate (6) welding is on welding machine case (3), the one end welding that movable machine case (4) was kept away from to the upper surface of fixed plate (6) has backbone (7), the top welding of backbone (7) has roof (8), first screw hole (11) have been seted up on roof (8), threaded connection has first screw rod (9) on first screw hole (11), the top of first screw rod (9) is fixed with first fastening dish (10), the bottom mounting of first screw rod (9) has frustum (13), the upper surface of fixed plate (6) is located the below of frustum (13) and is provided with test piece (12).

3. The fatigue testing device for mechanical parts according to claim 1, wherein: horizontal fastening device (35) are including linking board (14), and the both ends of linking board (14) are fixed with mounting plate (28) respectively, and the side of keeping away from test piece (12) even board (14) is fixed with decides plectrum (15), and threaded connection has third screw rod (30) on mounting plate (28), and the one end that third screw rod (30) are close to test piece (12) is connected with arc (31) through the bearing, and the one end that test piece (12) were kept away from in third screw rod (30) is fixed with second fastening dish (29).

4. The fatigue testing device for mechanical parts according to claim 1, wherein: power unit (34) include motor groove (26), motor groove (26) are seted up on movable chassis (4), and run through its upper surface, install servo motor (25) in motor groove (26), the output shaft of servo motor (25) has pivot (32) through the coupling joint, be fixed with carousel (19) on the top side of pivot (32), draw-in groove (17) have been seted up on carousel (19), sliding connection has transfer plate (18) in draw-in groove (17), transfer plate (18) are made by flexible material, the one end that transfer plate (18) are close to draw-in groove (17) is fixed with cardboard (16), the input of servo motor (25) is connected with the output electricity of singlechip (5).

5. The fatigue testing device for mechanical parts according to claim 1, wherein: motion (36) include mounting groove (21), mounting groove (21) are seted up on welding machine case (3), run through the side that welding machine case (3) are close to movable machine case (4), the last surface mounting of mounting groove (21) has step motor (20), the output shaft of step motor (20) passes through the one end fixed connection of shaft coupling and second screw rod (23), second screw hole (24) that correspond with second screw rod (23) are seted up on movable machine case (4), the other end and second screw hole (24) threaded connection of second screw rod (23), the input of step motor (20) is connected with the output electricity of singlechip (5).

6. The fatigue testing device for mechanical parts according to claim 4, wherein: the side of pivot (32) is installed counter (27), and counter (27) are fixed in the upper surface of activity machine case (4), and the output of counter (27) is connected with the input electricity of singlechip (5).

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