Mechanical loading device of testing machine

Abstract

The utility model relates to the technical field of testing machines, and discloses a mechanical loading device of a testing machine, including a base, an electric telescopic rod is fixedly installed on the upper end of the base, a movable plate is fixedly installed on the upper end of the electric telescopic rod, a loading bolt is fixedly installed in the middle of the movable plate, a loading spring is fixedly installed on the lower end of the loading bolt, a loading device is arranged at the lower end of the loading spring, the loading device includes a threaded rod, an adjusting nut, a movable sleeve, a sliding ring, a force transmission plate, a sliding block, a connecting rod and a pressure head, and the upper end of the threaded rod is fixedly connected to the loading spring. The mechanical loading device of the testing machine is provided with a loading device to load structural parts of different specifications to improve applicability, and multiple groups of pressure heads are used at the same time to ensure uniformity of loading on the structural parts and improve the accuracy of the test, and the stability of the pressure head when adjusting is ensured by fixing a guide rod on the outer wall of the sliding block.

Description

Technical Field

[0001] The utility model relates to the technical field of testing machines, in particular to a mechanical loading device of a testing machine. Background Art

[0002] Among the loading methods for structural component testing, mechanical loading devices are relatively simple and easy to implement. Sustained load tests on structural components are more common in experimental tests on structural components.

[0003] At present, in the process of loading structural parts, a pressure head is generally used to press the structural parts, and the pressure head is fixedly installed at the bottom middle end of the force transmission block. As a result, when loading the structural parts, only the middle part of the structural parts can be loaded, resulting in uneven loading and the deformation degree of the structural parts cannot be measured well. In view of this, we propose a mechanical loading device for the testing machine. Utility Model Content

[0004] The purpose of the utility model is to provide a mechanical loading device for a testing machine to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a mechanical loading device of a testing machine, comprising a base, an electric telescopic rod is fixedly installed on the upper end of the base, a movable plate is fixedly installed on the upper end of the electric telescopic rod, a loading bolt is fixedly installed on the middle part of the movable plate, a loading spring is fixedly installed on the lower end of the loading bolt, a loading device is arranged on the lower end of the loading spring, and the loading device comprises:

[0006] A threaded rod, wherein the upper end of the threaded rod is fixedly connected to the loading spring, an adjusting nut is threadedly connected to the outer wall of the threaded rod, a movable sleeve is fixedly installed at the lower end of the adjusting nut, and a sliding ring is rotatably connected to the lower end of the movable sleeve;

[0007] A force transmission plate, the upper end of which is fixedly connected to the threaded rod, a sliding groove is provided on the force transmission plate, a sliding block is slidably connected in the sliding groove, the upper end of the sliding block is hinged to the connecting rod, and the upper end of the connecting rod is hinged to the sliding ring;

[0008] A pressure head, the upper end of which is fixedly connected to the sliding block.

[0009] Preferably, a guide groove is provided in the slide groove.

[0010] Preferably, a guide rod is fixedly mounted on the outer wall of the sliding block, and the guide rod is slidably connected in the guide groove.

[0011] Preferably, an anti-skid pad is fixedly installed in the middle of the upper end of the base to improve the stability of the structural member during loading.

[0012] Preferably, a scale is fixedly mounted on the outer wall at the right end of the base.

[0013] Preferably, a pointer is fixedly mounted on the outer wall of the right end of the movable plate, and the pointer points to the position on the scale, so that the loaded value can be easily checked.

[0014] Compared with the prior art, the utility model provides a mechanical loading device for a testing machine, which has the following beneficial effects:

[0015] 1. The mechanical loading device of the testing machine is provided with a loading device. When the structural member is loaded, the adjusting nut is rotated on the outer wall of the threaded rod, so that the adjusting nut drives the movable sleeve and the sliding ring to slide up and down on the outer wall of the threaded rod, thereby controlling the connecting rod, the sliding block and the pressure head to contract inward and expand outward. The distance between the pressure heads can be adjusted according to the specifications of different structural members, and structural members of different specifications can be loaded to improve applicability. At the same time, multiple groups of pressure heads are used to ensure the uniformity of loading on the structural members and improve the accuracy of the test.

[0016] 2. The mechanical loading device of the testing machine has a guide rod fixedly installed on the outer wall of the sliding block, so that the guide rod slides in the guide groove, which can play a limiting and guiding role on the moving trajectory of the sliding block, thereby ensuring the stability of the pressure head when adjusting. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a structural schematic diagram of the loading device part of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the cross-section part of the force transmission plate of the utility model.

[0020] In the figure: 1. base; 2. electric telescopic rod; 3. movable plate; 4. loading bolt; 401. loading spring; 5. loading device; 501. threaded rod; 502. adjusting nut; 503. movable sleeve; 504. sliding ring; 505. force transmission plate; 5051. slide groove; 5052. guide groove; 506. sliding block; 507. connecting rod; 508. pressure head; 6. guide rod; 7. anti-slip pad; 8. scale; 9. pointer. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 3As shown, the utility model provides a technical solution: a mechanical loading device of a testing machine, comprising a base 1, an electric telescopic rod 2 is fixedly installed on the upper end of the base 1, a movable plate 3 is fixedly installed on the upper end of the electric telescopic rod 2, a loading bolt 4 is fixedly installed in the middle of the movable plate 3, a loading spring 401 is fixedly installed on the lower end of the loading bolt 4, a loading device 5 is arranged at the lower end of the loading spring 401, the loading device 5 comprises a threaded rod 501, the upper end of the threaded rod 501 is fixedly connected to the loading spring 401, and the threaded rod 501 is fixedly connected to the loading spring 401. An adjusting nut 502 is threadedly connected to the outer wall, and a movable sleeve 503 is fixedly installed on the lower end of the adjusting nut 502. A sliding ring 504 is rotatably connected to the lower end of the movable sleeve 503. The lower end of the threaded rod 501 is fixedly connected to the force transmission plate 505. A sliding groove 5051 is provided on the force transmission plate 505. A sliding block 506 is slidably connected in the sliding groove 5051. The upper end of the sliding block 506 is hinged to the connecting rod 507. The upper end of the connecting rod 507 is hinged to the sliding ring 504. A pressure head 508 is fixedly installed on the lower end of the sliding block 506.

[0022] Specifically, the loading device 5 of the technical solution of the utility model includes a threaded rod 501, an adjusting nut 502, a movable sleeve 503, a sliding ring 504, a force transmission plate 505, a sliding block 506, a connecting rod 507 and a pressure head 508. By rotating the adjusting nut 502, the adjusting nut 502 can drive the movable sleeve 503 and the sliding ring 504 to move up and down on the outer wall of the threaded rod 501. At this time, the sliding ring 504 controls the connecting rod 507, the sliding block 506 and the pressure head 508 to shrink inward and open outward, thereby adjusting the distance between the pressure heads 508, which is convenient for loading operations on structural parts of different specifications and improves applicability. At the same time, using multiple sets of pressure heads 508 can improve the uniformity of loading on structural parts and improve the accuracy of the test.

[0023] In one embodiment of the utility model, since the movable sleeve 503 and the sliding ring 504 are rotatably connected, when the adjusting nut 502 rotates on the threaded rod 501, the sliding ring 504 can move up and down. When the sliding ring 504 moves upward, the pressure head 508 contracts inward, and when the sliding ring 504 moves downward, the pressure head 508 opens outward, which is convenient for adjustment when loading different structural parts.

[0024] Please continue reading Figure 1-Figure 3 A guide groove 5052 is provided in the slide groove 5051, a guide rod 6 is fixedly installed on the outer wall of the sliding block 506, the guide rod 6 is slidably connected in the guide groove 5052, an anti-slip pad 7 is fixedly installed in the middle of the upper end of the base 1, a scale 8 is fixedly installed on the outer wall of the right end of the base 1, and a pointer 9 is fixedly installed on the outer wall of the right end of the movable plate 3.

[0025] In order to prevent the sliding block 506 from being offset when sliding in the sliding groove 5051 of the force transmission plate 505, thereby affecting the normal adjustment of the pressure head 508, a guide rod 6 is fixedly installed on the outer wall of the sliding block 506 so that the guide rod 6 slides in the guide groove 5052. This can serve as a limit guide for the moving trajectory of the sliding block 506, thereby ensuring the stability of the pressure head 508 when loading the structural parts.

[0026] During use, when it is necessary to test the loading of the structural member, first place the structural member on the anti-slip pad 7 of the base 1. At this time, the adjusting nut 502 is rotated on the outer wall of the threaded rod 501, so that the adjusting nut 502 drives the movable sleeve 503 and the sliding ring 504 to slide up and down on the outer wall of the threaded rod 501, thereby controlling the connecting rod 507, the sliding block 506 and the pressure head 508 to shrink inward and expand outward, and the distance between the pressure heads 508 is adjusted according to the specifications of the structural member. After the adjustment is completed, the electric telescopic rod 2 is started to drive the movable plate 3 to move downward. At this time, the pressure head 508 contacts the structural member. As the movable plate 3 continues to move downward, the loading spring 401 is squeezed and deformed. According to the position on the scale 8 pointed to by the pointer 9 at the right end of the movable plate 3, the size of the load can be checked.

[0027] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A mechanical loading device for a testing machine, comprising a base (1), characterized in that: An electric telescopic rod (2) is fixedly mounted on the upper end of the base (1), a movable plate (3) is fixedly mounted on the upper end of the electric telescopic rod (2), a loading bolt (4) is fixedly mounted in the middle of the movable plate (3), a loading spring (401) is fixedly mounted on the lower end of the loading bolt (4), a loading device (5) is provided at the lower end of the loading spring (401), and the loading device (5) comprises: A threaded rod (501), the upper end of the threaded rod (501) is fixedly connected to the loading spring (401), an adjusting nut (502) is threadedly connected to the outer wall of the threaded rod (501), a movable sleeve (503) is fixedly installed at the lower end of the adjusting nut (502), and a sliding ring (504) is rotatably connected to the lower end of the movable sleeve (503); A force transmission plate (505), the upper end of which is fixedly connected to the threaded rod (501), a sliding groove (5051) is provided on the force transmission plate (505), a sliding block (506) is slidably connected in the sliding groove (5051), the upper end of the sliding block (506) is hinged to a connecting rod (507), and the upper end of the connecting rod (507) is hinged to a sliding ring (504); A pressure head (508), the upper end of which is fixedly connected to the sliding block (506).

2. A mechanical loading device for a testing machine according to claim 1, characterized in that: A guide groove (5052) is provided in the slide groove (5051).

3. The mechanical loading device of a testing machine according to claim 1, characterized in that: A guide rod (6) is fixedly mounted on the outer wall of the sliding block (506), and the guide rod (6) is slidably connected in the guide groove (5052).

4. The mechanical loading device of a testing machine according to claim 1, characterized in that: An anti-slip pad (7) is fixedly mounted on the middle portion of the upper end of the base (1).

5. The mechanical loading device of a testing machine according to claim 1, characterized in that: A scale (8) is fixedly mounted on the outer wall of the right end of the base (1).

6. The mechanical loading device of a testing machine according to claim 1, characterized in that: A pointer (9) is fixedly mounted on the outer wall of the right end of the movable plate (3).

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