Bending strength testing device

Abstract

The utility model relates to the technical field of testing devices, in particular to a bending strength testing device which comprises a bottom plate, a support is fixedly installed on the upper portion of the bottom plate, a support is arranged in a groove in a sliding mode, a telescopic rod is fixedly connected to the upper portion of the support, and a barbell rod is arranged on the lower portion of the telescopic rod. Corresponding bolt holes are formed in the positions, corresponding to the bolt holes of the groove in the bottom plate, of the support, a supporting rod is fixedly installed on the upper portion of the support, and the supporting rod is fixedly connected with a clamping device. The barbell rod is placed in the space defined by the five fixing pieces, then the rotating handle is rotated to enable the sliding rod to slide in the annular fastener, then the round plate drives the pushing pieces to move, and when the pushing pieces are driven to move, the fixing pieces can be pushed to rotate with the fixing shaft as the circle center. And the five fixing sheets are used for clamping the barbell rod, so that the bending strength of barbell rods with different sizes and specifications can be tested.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a testing device for flexural strength. Background Technique

[0002] A barbell is a core training sports training equipment and also the equipment used in weightlifting. Barbell exercise belongs to a kind of weight training. It only uses barbell training equipment to enhance muscle strength training, and can also use the barbell for core training to promote overall coordination. A standard barbell consists of a barbell rod (crossbar), barbell plates and collars.

[0003] In the prior art, there is a testing device for flexural strength disclosed in CN216247554U. This technology includes multiple pull rods, a base, a clamping plate fixedly connected to the base, multiple tightening plates slidably connected to the base, and multiple tightening nuts arranged on the side of the clamping plate away from the tightening plates. The other end of the pull rod is provided with an external thread, and the pull rod is slidably connected to the clamping plate. The multiple tightening nuts are respectively threadedly connected to the multiple pull rods. The base is provided with a pulling assembly for bending the barbell rod, and the pulling assembly is connected with a weighing instrument for measuring the tensile force received by the barbell rod. By sliding the pull rod and adjusting the position of the pull rod on the base, it can be applicable to barbell rods of various lengths, and force application points are set at different positions of the barbell rod to measure the flexural strength of the barbell rod under different force application points. However, there are the following problems in use:

[0004] When the above technology conducts the flexural strength test of the barbell rod, by placing the barbell rod into the through hole in the upper part of the pull rod, since the size of the through hole cannot be adjusted, barbell rods of different sizes and specifications cannot be placed into the through hole, resulting in the inability to conduct the flexural strength test on barbell rods of different sizes and specifications, and the use is relatively limited. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem that barbell rods of different sizes and specifications cannot be tested in the prior art, and to propose a testing device for flexural strength.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A testing device for flexural strength, including a bottom plate. A bracket is fixedly installed on the upper part of the bottom plate, and a groove is formed in the bottom plate. A support is slidably arranged in the groove. The bracket is in a Π shape. An expansion link is fixedly connected to the upper part of the bracket. A barbell rod is arranged below the expansion link. A number of bolt holes are arranged in the groove of the bottom plate. The support is provided with corresponding bolt holes at the positions of the bolt holes in the groove of the bottom plate. A support rod is fixedly installed on the upper part of the support, and the support rod is fixedly connected with a clamping device.

[0008] Preferably, the clamping device includes a circular ring sleeve which has a cavity structure. An annular fastener is fixedly connected inside the circular ring sleeve. A sliding rod is arranged inside the annular fastener, and the sliding rod is rotatably connected with a circular plate.

[0009] Preferably, five pushing pieces are rotatably connected to the circular plate. Each of the five pushing pieces is rotatably connected with a fixing piece. One end of the fixing piece is rotatably connected with a fixing shaft, and the fixing shaft is fixedly connected inside the circular ring sleeve.

[0010] Preferably, a threaded hole is formed at one end of the sliding rod, and a plurality of through holes are formed in the circular ring sleeve corresponding to the moving path of the sliding rod.

[0011] Preferably, the pushing pieces are in the shape of arc-shaped pieces. The five fixing pieces are equidistantly distributed on the circular plate, and the barbell rod is arranged in the space enclosed by the five fixing pieces.

[0012] Preferably, the sliding rod is fixedly connected with a rotating handle, and the rotating handle is arranged in an arc-shaped sliding groove formed in the circular ring sleeve.

[0013] Compared with the prior art, the present utility model has the following advantages:

[0014] In the present utility model, the barbell rod is placed in the space enclosed by the five fixing pieces, and then the rotating handle is rotated to make the sliding rod slide in the annular fastener, driving the circular plate to rotate. Subsequently, the circular plate drives the pushing pieces to move. When driving the pushing pieces to move, it will push the fixing pieces to rotate around the fixing shaft as the center, so that the five fixing pieces clamp the barbell rod, thereby performing a bending strength test on barbell rods of different sizes and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a bending strength testing device proposed by the present utility model;

[0016] Figure 2 is a front sectional view of a bending strength testing device proposed by the present utility model;

[0017] Figure 3 is a partial enlarged view of area A of a bending strength testing device proposed by the present utility model;

[0018] Figure 4 is a schematic diagram of the annular fastener and the sliding rod of a bending strength testing device proposed by the present utility model;

[0019] Figure 5 is a schematic diagram of the support rod and the circular ring sleeve of a bending strength testing device proposed by the present utility model;

[0020] Figure 6Schematic diagram of the fixed shaft and threaded hole of a test device for the flexural strength proposed by the present utility model.

[0021] In the figure: 1, bottom plate; 2, bracket; 3, through hole; 4, telescopic rod; 5, barbell rod; 6, ring sleeve; 7, circular plate; 8, sliding rod; 9, rotating handle; 10, annular fastener; 11, pushing piece; 12, fixing piece; 13, fixed shaft; 14, support rod; 15, support; 16, threaded hole. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Refer to Figures 1-6 , a test device for flexural strength, including a bottom plate 1, a bracket 2 is fixedly installed on the upper part of the bottom plate 1, and a groove is opened in the bottom plate 1. A support 15 is slidably arranged in the groove. The bracket 2 is in a Π shape. An upper part of the bracket 2 is fixedly connected with a telescopic rod 4. A barbell rod 5 is arranged below the telescopic rod 4. A plurality of bolt holes are arranged in the groove of the bottom plate 1. Corresponding bolt holes are arranged at the positions of the bolt holes in the groove of the bottom plate 1 relative to the support 15. A support rod 14 is fixedly installed on the upper part of the support 15. The support rod 14 is fixedly connected with a clamping device;

[0024] The clamping device includes a ring sleeve 6. The ring sleeve 6 is a cavity structure. An annular fastener 10 is fixedly connected inside the ring sleeve 6. The outer ring of the annular fastener 10 is fixedly connected to the inner wall of the ring sleeve 6. The inner ring of the annular fastener 10 is fixedly connected to the inner wall of the ring sleeve 6. A sliding rod 8 is arranged inside the annular fastener 10. The sliding rod 8 is rotatably connected with a circular plate 7;

[0025] The circular plate 7 is rotatably connected with five pushing pieces 11. Each of the five pushing pieces 11 is rotatably connected with a fixing piece 12. One end of the fixing piece 12 is rotatably connected with a fixed shaft 13. The fixed shaft 13 is fixedly connected inside the ring sleeve 6. When the pushing piece 11 moves, it pushes the fixing piece 12 to rotate around the fixed shaft 13. When it rotates to a certain extent, the inner wall of the fixing piece 12 will restrict the barbell rod 5. And the space surrounded by the five fixing pieces 12 is circular, which can fully clamp the barbell rod 5;

[0026] One end of the sliding rod 8 is provided with a threaded hole 16. A plurality of through holes 3 are opened in the ring sleeve 6 corresponding to the moving route of the sliding rod 8. And bolts enter the threaded hole 16 from the through holes 3 to restrict the movement of the sliding rod 8;

[0027] The pushing piece 11 is in the shape of an arc piece. The five fixing pieces 12 are equidistantly distributed on the circular plate 7. And the barbell rod 5 is arranged inside the space surrounded by the five fixing pieces 12;

[0028] The sliding rod 8 is fixedly connected with a rotating handle 9, and the rotating handle 9 is arranged in an arc-shaped sliding groove formed in the circular ring sleeve 6. When the rotating handle 9 rotates along the annular fastener 10, the sliding rod 8 will drive the circular plate 7 to move.

[0029] The functional principle of the present utility model can be described through the following operation method:

[0030] When testing the bending strength of the barbell rod 5, first adjust the distance between the two supports 15 according to the different sizes and specifications of the barbell rod 5, then fix the supports 15 in the bolt holes arranged in the grooves of the bottom plate 1 by screwing bolts into the bolt holes of the box, and then place the barbell rod 5 in the space surrounded by the five fixing pieces 12. Then rotate the rotating handle 9 to make the sliding rod 8 slide in the annular fastener 10. When the sliding rod 8 slides, it will drive the circular plate 7 to rotate. Subsequently, the circular plate 7 drives the pushing piece 11 to move. When driving the pushing piece 11 to move, it will push the fixing piece 12 to rotate around the fixed shaft 13, so that the five fixing pieces 12 clamp the barbell rod 5. Then screw a bolt from the through hole 3 arranged in the circular ring sleeve 6 into the threaded hole 16 of the sliding rod 8 to limit the movement of the fixing piece 12 and prevent the barbell rod 5 from loosening and falling off during the test. Then lower the telescopic rod 4 to test the bending strength of the barbell rod 5.

[0031] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A bending strength testing device, comprising a base plate (1), characterized in that: A bracket (2) is fixedly mounted on the upper part of the base plate (1), and a groove is provided in the base plate (1), a support (15) is slidably arranged in the groove, the bracket (2) is in a Π shape, a telescopic rod (4) is fixedly connected to the upper part of the bracket (2), a barbell rod (5) is arranged at the lower part of the telescopic rod (4), a plurality of bolt holes are arranged in the groove in the base plate (1), the support (15) is provided with corresponding bolt holes relative to the bolt holes in the groove in the base plate (1), a support rod (14) is fixedly mounted on the upper part of the support (15), and a clamping device is fixedly connected to the support rod (14).

2. A bending strength testing device according to claim 1, characterized in that: The clamping device comprises a circular ring sleeve (6), the circular ring sleeve (6) is a hollow structure, a circular fastener (10) is fixedly connected inside the circular ring sleeve (6), a sliding rod (8) is arranged inside the circular fastener (10), and the sliding rod (8) is rotatably connected to a circular plate (7).

3. A bending strength testing device according to claim 2, characterized in that: The circular plate (7) is rotatably connected to five push plates (11), each of the five push plates (11) is rotatably connected to a fixing plate (12), one end of the fixing plate (12) is rotatably connected to a fixing shaft (13), and the fixing shaft (13) is fixedly connected to the inside of the circular ring sleeve (6).

4. A bending strength testing device according to claim 3, characterized in that: A threaded hole (16) is formed at one end of the sliding rod (8), and a plurality of through holes (3) are formed in the circular ring sleeve (6) corresponding to the moving path of the sliding rod (8).

5. The bending strength testing device according to claim 3, characterized in that: The pushing plate (11) is in the shape of an arc plate, the five fixing plates (12) are equidistantly distributed on the circular plate (7), and the barbell bar (5) is arranged in a space surrounded by the five fixing plates (12).

6. A bending strength testing device according to claim 2, characterized in that: The sliding rod (8) is fixedly connected to a rotating handle (9), and the rotating handle (9) is arranged in an arc-shaped sliding groove formed in the circular ring sleeve (6).

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