CN216247554U

CN216247554U - Testing arrangement of bending strength of barbell bar

Info

Publication number: CN216247554U
Application number: CN202122505915.6U
Authority: CN
Inventors: 戴一徐; 戴勋
Original assignee: Nantong Hengli Sports Goods Co ltd
Current assignee: Nantong Hengli Sports Goods Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-04-08
Anticipated expiration: 2031-10-18

Abstract

The utility model discloses a device for testing the bending strength of a barbell bar, which aims at the problem that the barbell bar with various specifications cannot be detected and provides the following technical scheme, wherein the device comprises a plurality of pull rods, a base, a clamping plate fixedly connected to the base, a plurality of tightening plates connected to the base in a sliding manner and a plurality of tightening nuts arranged on one side of the clamping plate far away from the tightening plates; one end of the pull rod is provided with a through hole for the barbell rod to pass through, the other end of the pull rod is provided with external threads, the pull rod is connected with the clamping plate in a sliding manner, the plurality of tightening plates are respectively fixedly connected with the plurality of pull rods, and the plurality of tightening nuts are respectively in threaded connection with the plurality of pull rods; the base is provided with a pulling assembly for bending the barbell bar, and the pulling assembly is connected with a weighing instrument for measuring the tension borne by the barbell bar. The sliding pull rod adjusts the position of the pull rod on the base, is applicable to barbell rods with various lengths, and stress points are arranged at different positions of the barbell rods, so that the bending strength of the barbell rods under different conditions can be measured.

Description

Testing arrangement of bending strength of barbell bar

Technical Field

The utility model relates to the technical field of barbell bar processing, in particular to a testing device for the bending strength of a barbell bar.

Background

The barbell is a core training exercise training device and is also a weight lifting device. The barbell exercise belongs to weight training, utilizes barbell training equipment to improve the training of muscle strength, and can also utilize the barbell to carry out core training to promote the overall coordination. The standard barbell consists of a barbell bar (bar), a barbell disc and a hoop.

The barbell bar is dangerous when being bent without early warning during exercise and lifting, so that the whole barbell is unbalanced and inclined, and a user can feel panic and lose shape to press the barbell bar to himself due to sudden deformation. In the future, even the slightest injury can hurt the tendons and bones only once. Therefore, a device for testing the bending strength of the barbell bar is required.

At present, chinese patent that the publication number is CN210090202U discloses a pressure test device is used in barbell bar production, it includes the shell, fixing base and pressure display table, the shell leading flank is provided with the guard gate, and be provided with the toughened glass window on the guard gate leading flank, toughened glass window right side is provided with the handle simultaneously, the through-hole has all been seted up to the shell left and right sides face, and the inside downside of shell is provided with the pneumatic cylinder, the pneumatic cylinder downside is provided with the hydraulic stem, and the hydraulic stem downside is provided with spacing concave plate, the fixing base sets up the side in the shell inside, and the side is provided with the fixed column on the fixing base, the draw-in groove has been seted up to the side on the fixed column simultaneously, the pressure display table sets up respectively on the shell left and right sides face, and the pressure display table sets up at the through-hole lateral surface.

The positions of the hydraulic rod and the fixed seat are fixed, only one specification of barbell rod can be detected, but barbell rods with various lengths and bending straight rods are on the market. Therefore, there is a need for a device that can test the flexural strength of barbell bars of various specifications, with room for improvement.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a device for testing the bending strength of a barbell bar, which has the advantage of being capable of testing the bending strength of barbell bars with different length specifications.

In order to achieve the purpose, the utility model provides the following technical scheme:

a device for testing the bending strength of a barbell bar comprises a plurality of pull rods, a base fixedly arranged on the ground, a clamping plate fixedly connected to the base, a plurality of tightening plates connected to the base in a sliding manner and a plurality of tightening nuts arranged on one side of the clamping plate far away from the tightening plates; one end of the pull rod is provided with a through hole for the barbell rod to pass through, the other end of the pull rod is provided with an external thread, the pull rod is connected with the clamping plate in a sliding manner, the plurality of tightening plates are respectively fixedly connected with the plurality of pull rods, and the plurality of tightening nuts are respectively in threaded connection with the plurality of pull rods; the base is provided with a pulling assembly for bending the barbell bar, and the pulling assembly is connected with a weighing instrument for measuring the tension borne by the barbell bar.

By adopting the technical scheme, the pull rod is slid according to the length of the barbell rod, and the position of the pull rod on the base is adjusted, so that the device is suitable for barbell rods with various lengths. The puller nut is screwed on the pull rod, and the puller plate and the puller nut are clamped tightly on the clamping plates respectively at two sides of the clamping plates by utilizing the friction force between the screw pairs, so that the clamping plates and the pull rod are fixed, and the pull rod and the base are fixed. And (3) enabling the barbell bar to penetrate through the through holes of the pull rods, pulling the barbell bar by the pulling assembly, observing the bending degree of the barbell bar, and judging the bending strength of the barbell bar according to the pulling force applied to the barbell bar displayed by the weighing instrument.

Further, the pulling assembly comprises a drag hook, a bracket fixedly connected to the base and a steel cable slidably connected to the bracket, the barbell bar penetrates through the hook part of the drag hook, and the drag hook is connected with the steel cable through a weighing instrument.

By adopting the technical scheme, the barbell rod is hooked by the hook part of the draw hook, the steel cable is pulled, the steel cable slides on the support, the direction of the tension force is changed, the draw hook is pulled in a specific direction, the barbell rod is conveniently pulled, the weighing instrument is arranged between the steel cable and the draw hook, the tension force of the barbell rod is conveniently measured, and the barbell rod pulling device is simple in structure, easy to manufacture and low in cost.

Furthermore, one end of the steel cable, which is far away from the weighing instrument, is provided with a pulling power source for providing pulling force for the steel cable.

By adopting the technical scheme, the steel cable is automatically pulled by the pulling power source, so that the barbell bar is automatically pulled, and the automation of the device is increased.

Further, the support is rotatably connected with a first fixed pulley, and the steel cable is wound on the first fixed pulley.

By adopting the technical scheme, the first fixed pulley changes the tension direction of the steel cable and pulls the load, so that the steel cable is not in contact with the bracket, and the surface of the bracket is protected. The sliding friction between the steel cable and the support is changed into rolling friction by the first fixed pulley, so that the abrasion of the steel cable is reduced, the steel cable is protected, and the service life of the steel cable is prolonged.

Furthermore, the support is provided with a pulley block for changing the tension direction of the steel cable, and the steel cable is wound on the pulley block in multiple sections.

By adopting the technical scheme, the bending strength of the barbell bar is generally 500 kilograms, the pulley block has the labor-saving characteristic, the steel cable is wound on the pulley block in multiple sections, and the stress on the steel cable is smaller in the multiple sections of the steel cable compared with the winding method of one section of the steel cable, so that the damage to the steel cable caused by overlarge stress is prevented, and the service life of the steel cable is prolonged. The pulley block also has the characteristic of changing the direction of force, so that the barbell rod can be conveniently pulled at a proper angle, and the practicability of the device is improved.

Further, the pulley block comprises a movable pulley which is rotatably connected with the weighing instrument and a second fixed pulley which is rotatably connected with the support, and the steel cable is wound on the movable pulley and the second fixed pulley so as to change the direction of the pulling force of the steel cable.

By adopting the technical scheme, the movable pulley and the second fixed pulley divide the steel cable into two sections of pulling barbell rods, the stress of each section of the steel cable is divided into half of the pulling force, so that the steel cable is pulled more laborsavingly, the steel cable is prevented from being damaged by overlarge pulling force, the service life of the device is prolonged, and the cost is reduced.

Furthermore, the drag hook is equipped with two, two the one end mutual fixed connection of keeping away from hook portion of drag hook.

By adopting the technical scheme, the two drag hooks respectively have two pulling fulcrums on the barbell rod, compared with one fulcrum, the surface stress area of the barbell rod with the two fulcrums is larger, the surface stress intensity of the barbell rod is smaller, the damage to the surface of the barbell rod is reduced, and the barbell rod is protected. And two drag hooks compare in a drag hook, and the process of pulling is more stable, avoids the unexpected that causes of the change of sudden force, increases the security of device.

Furthermore, a supporting rod is fixedly connected between the two drag hooks.

By adopting the technical scheme, the support rod and the two drag hooks form a triangle, and the triangle has stable characteristics, so that the two drag hooks are stressed more stably in the process of pulling the barbell bar, the damage of the drag hooks is avoided, and the service life of the device is prolonged.

Further, the weighing instruments are arranged in series by two.

By adopting the technical scheme, the average number of the measurement values of the two weighing instruments is taken, the measurement error caused by the error of the weighing instruments is avoided, the measurement error is reduced, and the accuracy of the device is improved.

In conclusion, the utility model has the following beneficial effects:

1. the device is suitable for barbell bars with various lengths by sliding the pull rod according to the length of the barbell bar and adjusting the position of the pull rod on the base, and stress points are arranged at different positions of the barbell bar, so that the device can measure the bending strength of the barbell bar under different conditions of the stress points;

2. the tension borne by the barbell rod is measured by pulling the weighing instrument through the steel cable, and compared with the mode that the barbell rod is pushed by a hydraulic cylinder, the steel cable is lower in price and convenient to maintain;

3. through the winding of steel cable on the assembly pulley, become the pulling barbell rod of multistage formula with the steel cable, share the pulling force that the steel cable received, reduce the wearing and tearing of steel cable, the life of extension steel cable.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

fig. 2 is a sectional view of the tightening plate of the present embodiment.

In the figure: 1. a pull rod; 2. a base; 3. a splint; 4. a jacking plate; 5. tightly pushing the nut; 6. a pulling assembly; 61. a support; 62. pulling a hook; 63. a wire rope; 64. pulling a power source; 65. a first fixed pulley; 66. a second fixed pulley; 67. a movable pulley; 68. a strut; 69. a third fixed pulley; 7. a weighing instrument; 8. a clasp; 9. a barbell bar.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

A testing device for the bending strength of a barbell bar, which is shown in figure 1, comprises a long-strip-shaped base 2 fixedly arranged on the ground, a long-strip-shaped clamping plate 3 fixedly connected above the base 2, two pull rods 1 and two weighing instruments 7. Base 2 and splint 3 all set up along the horizontal direction, and two pull rods 1 set up along the direction of gravity.

Referring to fig. 1 and 2, a through groove is formed in the top of the base 2 along the length direction of the base 2, and two rectangular tightening plates 4 are slidably connected in the through groove of the base 2. One end of each of the two pull rods 1 is fixedly connected with the top side surfaces of the two tightening plates 4, and the other end of each of the two pull rods 1 is provided with a through hole for the barbell bar 9 to pass through. The fixed splint 3 that are equipped with rectangular shape of base 2's top surface, splint 3 set up along base 2's length direction, and splint 3 are equipped with the logical groove that supplies pull rod 1 to slide. The one end that is close to top tie plate 4 of pull rod 1 is equipped with the external screw thread, and threaded connection has top tight nut 5 on the external screw thread of pull rod 1, and top tight nut 5 sets up in the one side of keeping away from top tie plate 4 of splint 3.

Referring to fig. 1, the base 2 is provided with a pulling assembly 6, and the pulling assembly 6 includes two pulling hooks 62, a steel cable 63 and a square frame-shaped bracket 61 fixedly connected to the base 2. Be 45 angle settings between two drag hooks 62 to the one end fixed connection who keeps away from hook portion of two drag hooks 62 is equipped with branch 68 between two drag hooks 62, and the both ends of branch 68 are fixed connection respectively in the middle part of two drag hooks 62. The fixed ring that is equipped with in the one end of the reciprocal anchorage of two drag hooks 62, the clip 8 has worn to the ring, and clip 8 adopts the clip 8 that chinese patent publication of the publication number CN2464122Y, and the hook body of clip 8 and the ring of drag hook 62 are buckled each other. The ends of the two weighing devices 7 which measure the force are fastened to each other and form a series connection in the direction of gravity. The closed loop of the clasp 8 is looped around the end of the weighing cell 7 located below that is used for measuring the force.

Referring to fig. 1, a movable pulley 67 is looped on the top end of the upper weighing apparatus 7 of the two weighing apparatuses 7, a second fixed pulley 66 is rotatably connected to the top of the bracket 61, and the second fixed pulley 66 is located right above the movable pulley 67 in the gravity direction. The one end of the top of support 61 is rotated and is connected with first fixed pulley 65, is equipped with third fixed pulley 69 under the direction of gravity of first fixed pulley 65, and third fixed pulley 69 rotates to be connected in the bottom of support 61, and the bottom of support 61 is equipped with pulling power supply 64, and pulling power supply 64 adopts the rotating electrical machines, the output shaft of rotating electrical machines and the centre of a circle fixed connection of third fixed pulley 69, and the fuselage fixed connection of rotating electrical machines is in the bottom of support 61. The first fixed pulley 65, the second fixed pulley 66, the third fixed pulley 69 and the movable pulley 67 are wound with a steel cable 63, one free end of the steel cable 63 is fixedly connected to the second fixed pulley 66, extends from the second fixed pulley 66 and is wound on the wheel surface of the movable pulley 67, is wound on the wheel surface of the second fixed pulley 66, is wound on the wheel surface of the first fixed pulley 65 and is finally wound on the third fixed pulley 69, and the other free end of the steel cable 63 is fixedly connected to the third fixed pulley 69.

Referring to fig. 1 and 2, the working steps are as follows: the position of the pull rod 1 on the base 2 is adjusted by sliding the pull rod 1 according to the length of the barbell bar 9. Will push up tight nut 5 and close soon towards the direction that is close to splint 3, finally push up tight nut 5 and push up tight board 4 and press from both sides tight splint 3 jointly, because the pretightning force between tight nut 5 of top and the pull rod 1 makes the pressure between tight nut 5 of top and the splint 3 invariable, and frictional force is invariable, guarantees that pull rod 1 fixes on splint 3, and the distance adjustment between two pull rods 1 finishes. The barbell bar 9 penetrates through the through holes of the two pull rods 1, the middle part of the barbell bar 9 penetrates through the hook parts of the draw hooks 62, the rotating motor is started, the output shaft of the rotating motor drives the third fixed pulley 69 to rotate, the third fixed pulley 69 pulls the steel cable 63, the steel cable 63 is wound on the wheel surface of the third fixed pulley 69, the steel cable 63 sequentially passes through the directions of the transformation force of the first fixed pulley 65 and the second fixed pulley 66, the movable pulley 67 is pulled to move towards the direction far away from the ground along the gravity direction, the movable pulley 67 sequentially pulls the two weighing instruments 7 and the two draw hooks 62, and the middle part of the barbell bar 9 is bent upwards. The values of the two weighing instruments 7 and the degree of bending of the barbell bar 9 are observed, and the bending strength of the barbell bar 9 is determined based on the average value of the values of the two weighing instruments 7.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a testing arrangement of bending strength of barbell bar which characterized in that:

the device comprises a plurality of pull rods (1), a base (2) fixedly arranged on the ground, a clamping plate (3) fixedly connected to the base (2), a plurality of tightening plates (4) connected to the base (2) in a sliding manner, and a plurality of tightening nuts (5) arranged on one side, far away from the tightening plates (4), of the clamping plate (3);

one end of each pull rod (1) is provided with a through hole for a barbell rod (9) to pass through, the other end of each pull rod (1) is provided with an external thread, each pull rod (1) is connected to the corresponding clamping plate (3) in a sliding mode, the plurality of tightening plates (4) are fixedly connected with the plurality of pull rods (1) respectively, and the plurality of tightening nuts (5) are in threaded connection with the plurality of pull rods (1) respectively;

the barbell bar pulling device is characterized in that the base (2) is provided with a pulling assembly (6) for bending the barbell bar (9), and the pulling assembly (6) is connected with a weighing instrument (7) for measuring the tensile force borne by the barbell bar (9).

2. The apparatus for testing the bending strength of a barbell bar according to claim 1, wherein: pulling subassembly (6) include drag hook (62), fixed connection in support (61) of base (2) and sliding connection in steel cable (63) of support (61), hook portion of drag hook (62) is passed in barbell pole (9), drag hook (62) are connected through weighing apparatus (7) with steel cable (63).

3. The apparatus for testing the bending strength of a barbell bar according to claim 2, wherein: and one end of the steel cable (63) far away from the weighing instrument (7) is provided with a pulling power source (64) for providing pulling force for the steel cable (63).

4. The apparatus for testing the bending strength of a barbell bar according to claim 3, wherein: the support (61) is rotatably connected with a first fixed pulley (65), and the steel cable (63) is wound on the first fixed pulley (65).

5. The apparatus for testing the bending strength of a barbell bar according to claim 3, wherein: the support (61) is provided with a pulley block for changing the tension direction of the steel cable (63), and the steel cable (63) is wound on the pulley block in multiple sections.

6. The apparatus for testing the bending strength of a barbell bar according to claim 5, wherein: the pulley block comprises a movable pulley (67) rotatably connected with the weighing instrument (7) and a second fixed pulley (66) rotatably connected with the support (61), and the steel cable (63) is wound on the movable pulley (67) and the second fixed pulley (66) so as to change the direction of the pulling force of the steel cable (63).

7. The apparatus for testing the bending strength of a barbell bar according to claim 2, wherein: the draw hook (62) are provided with two, two draw hook (62) keep away from the one end mutual fixed connection of hook portion.

8. The apparatus for testing the bending strength of a barbell bar according to claim 7, wherein: a supporting rod (68) is fixedly connected between the two draw hooks (62).

9. The apparatus for testing the bending strength of a barbell bar according to claim 1, wherein: the weighing instruments (7) are arranged in series.