Electric fatigue testing machine

Abstract

The utility model discloses an electric fatigue testing machine which comprises a machine frame, vertical guide rods are fixed on the left portion and the right portion of the top face of a top plate of the machine frame, a vertical screw rod is arranged on the front portion of each vertical guide rod, and the vertical screw rods are movably connected to the top plate of the machine frame through bearings. The lower portion of the vertical screw extends out of the bottom face of the top plate of the rack and is fixedly provided with a synchronous pulley, a driving servo motor is installed in the rack, and the middle of the bottom face of the top plate of the rack is movably connected with a middle rotating shaft through a bearing. A synchronous belt wheel mounted at the bottom of the vertical screw rod and a synchronous wheel corresponding to the double rows of synchronous wheels are tensioned on the same synchronous belt; when the driving servo motor is damaged, the height position of the lifting plate can be adjusted through manual rotation, the test requirement is met, and the test progress is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to material detection technical field, more specifically to a kind of electric fatigue testing machine. BACKGROUND

[0002] Fatigue testing machine is used to determine the fatigue characteristics, fatigue life, pre-crack and crack propagation test of metal, alloy material and its components under room temperature state, and high-frequency fatigue testing machine can be used for static mechanical properties, dynamic mechanical properties and various conventional fracture mechanics performance tests of non-metallic materials after being equipped with corresponding test fixtures.

[0003] However, in the existing fatigue testing machine, the upper lifting plate is generally driven by a vertical screw rod to rotate, so that the height of the lifting plate can be adjusted. When the driving motor is damaged, the fatigue testing machine cannot be used continuously and needs to be repaired. During this process, the detection and use cannot be realized, which affects the normal test. When the product to be tested is urgent, it cannot be processed in time, which affects the test progress. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects of prior art, and provides an electric fatigue testing machine, which can realize the height adjustment of the lifting plate by manual rotation when the driving servo motor is damaged, meet the test needs, and ensure the test progress.

[0005] The utility model solves the technical problem by the following scheme:

[0006] An electric fatigue testing machine includes a rack, vertical guide rods are fixed to the top surface of the top plate of the rack at left and right portions, a vertical screw rod is arranged at the front portion of each vertical guide rod, the vertical screw rod is movably connected to the top plate of the rack through a bearing, the lower portion of the vertical screw rod extends out of the bottom surface of the top plate of the rack and is fixed with a synchronous pulley, a driving servo motor is installed in the rack, the middle portion of the bottom surface of the top plate of the rack is movably connected to an intermediate shaft through a bearing, the intermediate shaft is fixed with double synchronous pulleys at the middle portion, and the synchronous pulleys installed at the bottom of the vertical screw rod are tensioned on the same synchronous belt with the corresponding synchronous pulleys of the double synchronous pulleys.

[0007] The output shaft of the driving servo motor is detachably connected to the intermediate shaft.

[0008] The top end of the vertical guide rod is fixed with a connecting plate, and the top end of the vertical screw rod is movably connected to the corresponding connecting plate through a bearing.

[0009] The lifting plate is screwed on two vertical screw rods, two vertical guide rods are inserted into corresponding vertical guide holes in the lifting plate, a middle part of a top surface of the lifting plate is fixed with an electric cylinder, a bottom end of a push rod of the electric cylinder extends out of a bottom surface of the lifting plate and is fixed with a pressure head, a middle part of a top surface of a top plate of the rack is fixed with a load sensor, a top part of the load sensor is installed with a pressure seat, and the pressure head is right above the pressure seat.

[0010] A middle part of a top surface of a bottom plate of the rack is fixed with a motor seat, a driving servo motor is fixed on a bottom surface of a top plate of the motor seat, a top end of an output shaft of the driving servo motor extends out of a top surface of a top plate of the motor seat and is fixed or formed with a bottom circular block.

[0011] Vertical extension side through grooves are formed on left and right side walls of the bottom circular block, and a bottom end of the middle rotating shaft is fixed with an upper circular block.

[0012] Side insertion grooves are formed on the left and right side walls of the upper circular block, inner ends of the turnover arms are inserted into corresponding side insertion grooves and are movably connected to the upper circular block through the hinge shafts, and outer ends of the turnover arms are matched with the corresponding side through grooves.

[0013] The prominent effect of the utility model is:

[0014] Compared with the prior art, the utility model can realize the height position adjustment of the lifting plate through manual rotation when the driving servo motor is damaged, meet the test needs, ensure the test progress, and is convenient to operate and has good use effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a partial top view of the utility model;

[0016] Figure 2 is Figure 1 a partial enlarged view. DETAILED DESCRIPTION

[0017] Embodiment, see as Figures 1 to 2 shown, a kind of electric fatigue testing machine, including rack 10, the top surface of the top plate of the rack 10 Left and right parts are fixed with vertical guide rod 11, the front of each vertical guide rod 11 is equipped with vertical screw rod 12, vertical screw rod 12 is movably connected on the top plate of rack 10 by bearing, the lower part of vertical screw rod 12 extends out of the bottom surface of the top plate of rack 10 and is fixed with synchronous pulley 13, the lower part of two vertical screw rods 12 Synchronous pulley 13 has height difference, i.e. two synchronous pulleys 13 are not in the same plane;

[0018] The driving servo motor 14 is installed in the rack 10, the middle part of the bottom surface of the top plate of the rack 10 is movably connected with the intermediate shaft 15 through a bearing, the middle part of the intermediate shaft 15 is fixed with a double-row synchronous pulley 16, the bottom of the two vertical screw rods 12 is installed with a synchronous pulley 13, and the synchronous pulley 13 is tensioned on the same synchronous belt 1 between the corresponding synchronous pulleys of the double-row synchronous pulley 16;

[0019] The output shaft of the driving servo motor 14 is detachably connected with the intermediate shaft 15;

[0020] The top end of the vertical guide rod 11 is fixed with a connecting plate 17, and the top end of the vertical screw rod 12 is movably connected with the corresponding connecting plate 17 through a bearing;

[0021] The lifting plate 20 is screwed on the two vertical screw rods 12, the two vertical guide rods 11 are inserted into the corresponding vertical guide holes of the lifting plate 20, the middle part of the top surface of the lifting plate 20 is fixed with an electric cylinder 21, the bottom end of the push rod of the electric cylinder 21 extends out of the bottom surface of the lifting plate 20 and is fixed with a pressure head 22, the middle part of the top surface of the top plate of the rack 10 is fixed with a load sensor 18, the top of the load sensor 18 is installed with a pressure seat 23, and the pressure head 22 is directly above the pressure seat 23.

[0022] Further, the middle part of the top surface of the bottom plate of the rack 10 is fixed with a motor seat 19, the driving servo motor 14 is fixed on the bottom surface of the top plate of the motor seat 19, the top end of the output shaft of the driving servo motor 14 extends out of the top surface of the top plate of the motor seat 19 and is fixed or formed with a bottom circular block 191.

[0023] The left and right side walls of the bottom circular block 191 are formed with vertically extending side through grooves 192, the bottom end of the intermediate shaft 15 is fixed with an upper circular block 151, the upper circular block 151 corresponds to the bottom circular block 191 in an up-down manner, and the two have a spacing therebetween;

[0024] The left and right side walls of the upper circular block 151 are formed with side insertion grooves 152, the bottom end of the side insertion groove 152 extends out of the bottom surface of the upper circular block 151, the inner end of the turnover arm 30 is inserted into the corresponding side insertion groove 152 and movably connected with the upper circular block 151 through a hinge shaft, and the outer end of the turnover arm 30 cooperates with the corresponding side through groove 192.

[0025] The outer end of the turnover arm 30 is formed with a vertically extending connecting through hole 31.

[0026] The top surface of the side insertion groove 152 is formed with an upper recess, the upper permanent magnet block 2 is nested in the upper recess and fixed on the top surface of the upper recess, the inner end top surface of the turnover arm 30 is pressed against the top surface of the corresponding upper permanent magnet block 2 and is fixed by adsorption.

[0027] The inner side wall of the side through slot 192 is formed with an inner groove, the inner side permanent magnet block 3 is nested in the corresponding inner groove and fixed on the inner side wall of the inner groove, and the turnover arm 30 corresponds to the inner side permanent magnet block 3.

[0028] In use, when the driving servo motor 14 is driven to run, the two turnover arms 30 are turned down, so that the outer ends are inserted into the corresponding side through slots 192 and tightly abut against the corresponding inner side permanent magnet blocks 3, so that the adsorption and fixation are realized. At this time, by driving the servo motor 14 to run, the intermediate shaft 15 can be driven to rotate (in the embodiment, the rotation speed of the output shaft of the driving servo motor 14 is not high, so that when the intermediate shaft 15 rotates, the turnover arm 30 will not be moved out of the side through slot 192, so that the normal operation and the driving of the intermediate shaft 15 are ensured), so that the two vertical screws 12 are rotated, the height position of the lifting plate 20 is adjusted, so that the height installation requirement of the test product in detection is met, and the convenience is very high.

[0029] When the driving servo motor 14 is damaged or the height is adjusted by manual adjustment, the two turnover arms 30 can be turned up, so that the inner end top surface of the turnover arm 30 is pressed against the top surface of the corresponding upper permanent magnet block 2 and is adsorbed and fixed. Then, the bending part at one end of the extension rod is inserted into the corresponding connecting through hole 31, then the intermediate shaft 15 is driven to rotate by the extension rod, so that the two vertical screws 12 are driven to rotate, the adjustment is realized, the adjustment is convenient, and the normal use of the testing machine is met.

[0030] Finally, it should be pointed out that the above embodiments are only more representative examples of the present application. Obviously, the present application is not limited to the above embodiments, and many modifications can be made. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments should be considered as falling within the protection scope of the present application.

Claims

1. An electric fatigue testing machine, comprising a frame (10), characterized in that: Vertical guide rods (11) are fixed on the left and right sides of the top surface of the top plate of the frame (10). Each vertical guide rod (11) has a vertical screw (12) at the front. The vertical screw (12) is movably connected to the top plate of the frame (10) through a bearing. The lower part of the vertical screw (12) extends out of the bottom surface of the top plate of the frame (10) and is fixed with a synchronous pulley (13). A drive servo motor (14) is installed in the frame (10). The middle part of the bottom surface of the top plate of the frame (10) is movably connected to the intermediate shaft (15) through a bearing. A double row of synchronous pulleys (16) is fixed in the middle of the intermediate shaft (15). The synchronous pulley (13) installed at the bottom of the vertical screw (12) and the corresponding synchronous pulleys of the double row of synchronous pulleys (16) are tensioned on the same synchronous belt (1). The output shaft of the drive servo motor (14) is detachably connected to the intermediate rotating shaft (15); The top end of the vertical guide rod (11) is fixed with a connecting plate (17), and the top end of the vertical screw (12) is movably connected to the corresponding connecting plate (17) through a bearing; The lifting plate (20) is screwed onto two vertical screws (12), and two vertical guide rods (11) are inserted into the corresponding vertical guide through holes on the lifting plate (20). An electric cylinder (21) is fixed in the middle of the top surface of the lifting plate (20). The bottom end of the push rod of the electric cylinder (21) extends out of the bottom surface of the lifting plate (20) and is fixed with a pressure head (22). A load sensor (18) is fixed in the middle of the top surface of the top plate of the frame (10). A pressure seat (23) is installed on the top of the load sensor (18), and the pressure head (22) is located directly above the pressure seat (23).

2. The electric fatigue testing machine according to claim 1, characterized in that: A motor base (19) is fixed in the middle of the top surface of the base plate of the frame (10). A drive servo motor (14) is fixed on the bottom surface of the top plate of the motor base (19). The top end of the output shaft of the drive servo motor (14) extends out of the top surface of the top plate of the motor base (19) and is fixed or formed with a bottom circular block (191).

3. The electric fatigue testing machine according to claim 2, characterized in that: The bottom circular block (191) has vertically extending side through grooves (192) formed on its left and right side walls. The bottom end of the middle rotating shaft (15) is fixed with an upper circular block (151). The upper circular block (151) corresponds to the bottom circular block (191) vertically, and there is a gap between them. Side slots (152) are formed on both the left and right side walls of the upper circular block (151). The bottom end of the side slot (152) extends out of the bottom surface of the upper circular block (151). The inner end of the flip arm (30) is inserted into the corresponding side slot (152) and is movably connected to the upper circular block (151) through the hinge shaft. The outer end of the flip arm (30) cooperates with the corresponding side through groove (192).

4. The electric fatigue testing machine according to claim 3, characterized in that: The outer end of the flip arm (30) is formed with a vertically extending connecting through hole (31).

5. An electric fatigue testing machine according to claim 3, characterized in that: The top surface of the side slot (152) is formed with an upper groove, the upper permanent magnet block (2) is nested in the upper groove and fixed on the top surface of the upper groove, and the inner end top surface of the flip arm (30) presses against the top surface of the corresponding upper permanent magnet block (2) and is attracted and fixed.

6. The electric fatigue testing machine according to claim 3, characterized in that: The inner wall of the side passage groove (192) is formed with an inner groove, the inner permanent magnet block (3) is nested in the corresponding inner groove and fixed on the inner wall of the inner groove, and the flip arm (30) corresponds to the inner permanent magnet block (3).

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