Extensometer synchronizing device applied to tensile testing machine

Abstract

The utility model belongs to the technical field of inspection and assay, in particular to an extensometer synchronizing device applied to a tensile testing machine, which comprises a fixing device main body, a synchronizing shaft is rotatably connected onto the fixing device main body, and two ends of the synchronizing shaft extend to two sides of the fixing device main body and are fixedly connected with bearings. According to the fixing device, the fixing device body is arranged on the stand column of the tensile testing machine in the sleeving mode through the mounting hole, the rotary knob is rotated to drive the connecting rod to move through the lead screw, the connecting rod drives the corresponding second clamping plate to move at the same time, the second clamping plate moves towards the corresponding first clamping plate, and the stand column is clamped and fixed through the first clamping plate and the second clamping plate; the bearings are installed at the two ends of the synchronizing shaft on the fixing device body, finally the belt wheels are fixed at the two ends, the purpose that the belt wheels on the two sides can rotate synchronously is achieved, the structure is simple, the equipment failure rate is reduced, localization of imported spare parts is achieved, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection and testing, in particular to an extensometer synchronization device applied to a tensile testing machine. Background Art

[0002] In the field of material mechanical properties testing, tensile testing machines are indispensable and important equipment, which are widely used in tensile, compression, bending and other performance tests of metals, plastics, rubber and other materials. In these tests, extensometers are key devices for measuring the deformation of specimens during stress. Their accuracy and stability have a decisive influence on the reliability of test results.

[0003] Traditional tensile testing machine extensometers usually use a gear rack transmission mechanism to measure displacement. This mechanism converts the deformation of the specimen into a pointer or digital display reading on the extensometer through the rotation of multiple gears. However, due to the complex matching relationship between the gear groups, as well as the wear and poor lubrication between the gears during long-term use, this transmission mechanism exposes many problems in practical applications. First, the complex matching relationship between the gear groups causes the contact points between the gears to easily wear due to uneven force, which in turn causes a jamming phenomenon, which not only affects the measurement accuracy of the extensometer, but also may cause the extensometer to fail during the test, resulting in distortion of the test data. Secondly, due to the matching clearance and wear between the gears, the extensometer often cannot accurately reflect the deformation of the specimen when it moves with the crossbeam. Especially in high-speed stretching or large deformation tests, this error is more obvious, which seriously affects the accuracy of values ​​such as the elongation of the specimen. Therefore, we propose a synchronization device for the extensometer of a tensile testing machine to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a synchronization device for an extensometer of a tensile testing machine, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] A synchronization device for an extensometer of a tensile testing machine comprises a fixing device body, the fixing device body is rotatably connected to a synchronization shaft, both ends of the synchronization shaft extend to both sides of the fixing device body and are fixedly connected to bearings, a pulley is fixedly connected to the bearing, two mounting holes are provided on the fixing device body, two first clamping plates are welded to the top of the fixing device body, a U-shaped plate is fixedly connected to the top of the fixing device body, two rectangular blocks are welded to the bottom inner wall of the U-shaped plate, a lead screw is rotatably connected to the rectangular block, a connecting rod is threadedly connected to the lead screw, a second clamping plate is fixedly connected to the end of the connecting rod, and a knob is fixedly connected to the end of the lead screw.

[0009] Furthermore, two rectangular holes are provided on the inner wall of the bottom of the U-shaped plate.

[0010] Furthermore, a positioning block is slidably connected to the rectangular hole, and one side of the positioning block is fixedly connected to one side of the corresponding connecting rod.

[0011] Furthermore, the left pulley of the two pulleys is larger than the right pulley.

[0012] Furthermore, the pulley is made of aluminum alloy material.

[0013] Furthermore, a threaded hole is provided on the connecting rod, and the connecting rod is threadably connected to the corresponding screw rod through the threaded hole.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a synchronization device for an extensometer of a tensile testing machine, which has the following beneficial effects:

[0016] The utility model arranges the fixing device body on the column of the tensile testing machine through the installation hole, and then rotates the knob, the knob drives the corresponding screw rod to rotate, the screw rod drives the corresponding connecting rod to move, and the connecting rod drives the corresponding second clamping plate to move at the same time, so that the second clamping plate moves toward the corresponding first clamping plate, and the column is clamped and fixed by the first clamping plate and the second clamping plate, so that the fixing device body is fixed on the column, and bearings are installed at both ends of the synchronous shaft on the fixing device body, and finally the pulleys are fixed at both ends, so that the purpose of the pulleys on both sides can rotate synchronously is achieved, the structure is simple, the equipment failure rate is reduced, the localization of imported spare parts is realized, and the cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the other side of the utility model;

[0019] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model;

[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the inclined three-dimensional structure.

[0021] In the figure: 1. Fixing device body; 2. Synchronous shaft; 3. Bearing; 4. Pulley; 5. Mounting hole; 6. First clamping plate; 7. U-shaped plate; 8. Rectangular block; 9. Screw rod; 10. Connecting rod; 11. Second clamping plate; 12. Knob; 13. Rectangular hole; 14. Positioning block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] like Figure 1-4 As shown, an embodiment of the utility model proposes a synchronization device for an extensometer of a tensile testing machine, comprising a fixing device body 1, a synchronization shaft 2 is rotatably connected to the fixing device body 1, both ends of the synchronization shaft 2 extend to both sides of the fixing device body 1 and are fixedly connected to bearings 3, a pulley 4 is fixedly connected to the bearing 3, two mounting holes 5 are provided on the fixing device body 1, two first clamping plates 6 are welded to the top of the fixing device body 1, a U-shaped plate 7 is fixedly connected to the top of the fixing device body 1, two rectangular blocks 8 are welded to the bottom inner wall of the U-shaped plate 7, a screw rod 9 is rotatably connected to the rectangular block 8, a connecting rod 10 is threadedly connected to the screw rod 9, the end of the connecting rod 10 is fixedly connected to a second clamping plate 11, and the end of the screw rod 9 is fixedly connected to A knob 12 is connected, and the fixing device body 1 is sleeved on the column of the tensile testing machine through the mounting hole 5. Then the knob 12 is turned, and the knob 12 drives the corresponding screw rod 9 to rotate, and the screw rod 9 drives the corresponding connecting rod 10 to move, and the connecting rod 10 drives the corresponding second clamping plate 11 to move at the same time, so that the second clamping plate 11 moves toward the corresponding first clamping plate 6, and the column is clamped and fixed by the first clamping plate 6 and the second clamping plate 11, so that the fixing device body 1 is fixed on the column, and the bearings 3 are installed at both ends of the synchronous shaft 2 on the fixing device body 1, and finally the pulleys 4 are fixed at both ends, so that the purpose of the pulleys 4 on both sides can rotate synchronously is achieved, the structure is simple, the equipment failure rate is reduced, the localization of imported spare parts is realized, and the cost is saved.

[0025] like Figure 4 As shown, in some embodiments, two rectangular holes 13 are opened on the bottom inner wall of the U-shaped plate 7, and a positioning block 14 is slidably connected to the rectangular hole 13. One side of the positioning block 14 is fixedly connected to one side of the corresponding connecting rod 10. The setting of the positioning block 14 plays a limiting role.

[0026] like Figure 1 As shown, in some embodiments, the left pulley 4 of the two pulleys 4 is larger than the right pulley 4, and the pulley 4 is made of aluminum alloy material. The aluminum alloy has good thermal conductivity and can quickly dissipate heat during high-speed operation, reduce the temperature, and improve the transmission efficiency and service life.

[0027] like Figure 3 As shown, in some embodiments, a threaded hole is provided on the connecting rod 10, and the connecting rod 10 is threadedly connected to the corresponding screw rod 9 through the threaded hole. Under the bite force of the threaded hole and the screw rod 9 itself, the connecting rod 10 can be fixed after moving to a suitable position.

[0028] Working principle or structural principle, when in use, the fixing device body 1 is mounted on the column of the tensile testing machine through the mounting hole 5, and then the knob 12 is turned, the knob 12 drives the corresponding screw rod 9 to rotate, the screw rod 9 drives the corresponding connecting rod 10 to move, the connecting rod 10 drives the corresponding positioning block 14 to slide on the rectangular hole 13, and the connecting rod 10 drives the corresponding second clamping plate 11 to move at the same time, so that the second clamping plate 11 moves toward the corresponding first clamping plate 6, and the column is clamped and fixed by the first clamping plate 6 and the second clamping plate 11, so that the fixing device body 1 is fixed on the column, and the bearings 3 are installed at both ends of the synchronous shaft 2 on the fixing device body 1, and finally the pulleys 4 are fixed at both ends, so that the purpose of the pulleys 4 on both sides can rotate synchronously is achieved, the structure is simple, the equipment failure rate is reduced, the localization of imported spare parts is realized, and the cost is saved.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A synchronization device for an extensometer of a tensile testing machine, comprising a fixing device body (1), characterized in that: The fixing device body (1) is rotatably connected to a synchronous shaft (2), both ends of the synchronous shaft (2) extend to both sides of the fixing device body (1) and are fixedly connected to bearings (3), the bearings (3) are fixedly connected to a pulley (4), the fixing device body (1) is provided with two mounting holes (5), the top of the fixing device body (1) is welded with two first clamping plates (6), the top of the fixing device body (1) is fixedly connected to a U-shaped plate (7), the bottom inner wall of the U-shaped plate (7) is welded with two rectangular blocks (8), the rectangular block (8) is rotatably connected to a screw rod (9), the screw rod (9) is threadedly connected to a connecting rod (10), the end of the connecting rod (10) is fixedly connected to a second clamping plate (11), and the end of the screw rod (9) is fixedly connected to a knob (12).

2. The extensometer synchronization device for a tensile testing machine according to claim 1, characterized in that: Two rectangular holes (13) are provided on the inner wall of the bottom of the U-shaped plate (7).

3. The extensometer synchronization device for a tensile testing machine according to claim 2, characterized in that: A positioning block (14) is slidably connected to the rectangular hole (13), and one side of the positioning block (14) is fixedly connected to one side of the corresponding connecting rod (10).

4. The extensometer synchronization device for a tensile testing machine according to claim 1, characterized in that: Of the two belt pulleys (4), the left belt pulley (4) is larger than the right belt pulley (4).

5. The extensometer synchronization device for a tensile testing machine according to claim 1, characterized in that: The belt pulley (4) is made of aluminum alloy material.

6. The extensometer synchronization device for a tensile testing machine according to claim 1, characterized in that: The connecting rod (10) is provided with a threaded hole, and the connecting rod (10) is threadedly connected to the corresponding screw rod (9) through the threaded hole.

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