Locking nut for dumbbell

Abstract

The utility model relates to the technical field of dumbbell accessories, and discloses a dumbbell locking nut which comprises an external threaded rod, a locking nut end is detachably installed on the external threaded rod in a threaded mode, an installation groove is formed in the outward end of the external threaded rod, a limiting guide piece is installed in the installation groove, and the limiting guide piece is connected with the external threaded rod in a threaded mode. The limiting guide piece comprises two rotating limiting sliding blocks. According to the locking nut for the dumbbell, the two limiting guide pieces enter the limiting sliding ways in advance, so that the external threaded rod and the internal threaded sleeve are in an aligned limiting state, when the internal threaded sleeve rotates, threads on the internal threaded sleeve and threads on the external threaded rod can be precisely meshed together, force transmission is more uniform, and the service life of the dumbbell is prolonged. The internal thread sleeve is easier to rotate, abrasion of threads on the internal thread sleeve and the external thread rod is reduced, the situation of thread moving is avoided, connection between the internal thread sleeve and the external thread rod is more stable and firmer, and the service life of the internal thread sleeve and the external thread rod is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of dumbbell accessories, in particular to a locking nut for a dumbbell. Background Art

[0002] A dumbbell is a simple equipment for enhancing muscle strength training. Its purpose is for muscle strength training and compound muscle movement training. For patients with muscle weakness caused by motor paralysis, pain, long-term inactivity, etc., holding a dumbbell, they can use the weight of the dumbbell to perform anti-resistance active movement and train muscle strength. The counterweights of existing dumbbells are generally fixed with screws.

[0003] The prior art such as the publication number: CN207989504U discloses a locking nut for a dumbbell, including a locking nut and a locking screw. The inner wall of the locking screw is provided with internal threads for cooperating with the dumbbell rod to fix the counterweight of the dumbbell. The opening of the locking screw extends outwards to form a plurality of non-adhesive holding pieces. The beneficial effect of the utility model is that when the locking nut is fixed on the locking screw, the locking nut squeezes the holding pieces inwards, realizing the squeezing and fixing of the holding pieces and the dumbbell rod, making the locking screw not easy to loosen, and the use of the dumbbell is safer and more stable.

[0004] In view of the above and the existing related technologies, the inventor believes that there are often the following defects: when connecting between the locking nut and the locking screw, it is impossible to ensure that the locking nut and the locking screw are in a flat and aligned state before connection. When the locking nut is tilted, the threads of the two cannot be aligned. At this time, rotation will cause uneven force transmission, increase the friction between the threads, make the nut more difficult to rotate, and will also exacerbate the wear of the threads, thus affecting the reliability of the connection between the locking nut and the locking screw.

[0005] Therefore, we propose a locking nut for a dumbbell. Content of the Utility Model

[0006] In view of the problem that the existing locking nut and locking screw cannot be connected after ensuring a flat and aligned state, when the locking nut is tilted, the threads of the two cannot be aligned. At this time, rotation will cause uneven force transmission, increase the friction between the threads, make the nut more difficult to rotate, and will also exacerbate the wear of the threads, thus affecting the reliability of the connection between the locking nut and the locking screw, the present utility model is proposed.

[0007] Therefore, the purpose of the present utility model is to provide a locking nut for a dumbbell, and its purpose is to: after aligning the locking nut and the locking screw, perform thread connection to ensure the meshing degree of the threads between the two.

[0008] To solve the above technical problems, the present utility model provides the following technical solution: A locking nut for a dumbbell, comprising an outer threaded rod, on which a locking nut end is detachably installed by threading, an installation groove is formed at the outer end of the outer threaded rod, and a limiting and guiding member is installed inside the installation groove, and the limiting and guiding member comprises two rotatable limiting sliders;

[0009] The locking nut end comprises an inner threaded sleeve, and limiting sliding grooves adapted to the limiting sliders are formed on both sides of the inner wall of the inner threaded sleeve.

[0010] As a preferred scheme of the locking nut for a dumbbell according to the present utility model, wherein: the limiting and guiding member further comprises a rotating ring rotatably installed inside the installation groove through a bearing, vertical connecting strips are welded on both sides of the inner wall of the rotating ring, and the limiting sliders are welded on the vertical connecting strips.

[0011] As a preferred scheme of the locking nut for a dumbbell according to the present utility model, wherein: a threaded connecting hole is formed through one side of the outer wall of the inner threaded sleeve, and a butterfly bolt is installed on the inner threaded sleeve by threading through the threaded connecting hole.

[0012] As a preferred scheme of the locking nut for a dumbbell according to the present utility model, wherein: a rubber block is bonded to one end of the butterfly bolt close to the inner threaded sleeve, and the thickness of the rubber block is 0.5 cm.

[0013] As a preferred scheme of the locking nut for a dumbbell according to the present utility model, wherein: a finger ring rotating plate is welded to one end of the inner threaded sleeve away from the outer threaded rod, and a circle of thumb concave cavities is arranged on the outermost side of the inner threaded sleeve.

[0014] As a preferred scheme of the locking nut for a dumbbell according to the present utility model, wherein: the number of the thumb concave cavities is six, and they are evenly distributed at equal intervals.

[0015] The beneficial effects of the present utility model are:

[0016] 1. In the present utility model, the two limiting and guiding members first enter the inside of the limiting sliding grooves. At this time, the two limiting and guiding members play a role in limiting the inner threaded sleeve, realizing the state of alignment and limitation between the outer threaded rod and the inner threaded sleeve. When rotating the inner threaded sleeve, the threads on the inner threaded sleeve and the outer threaded rod can be accurately meshed together. The force transmission is more uniform, the inner threaded sleeve is easier to rotate, and the wear of the threads on the inner threaded sleeve and the outer threaded rod is also reduced, avoiding the situation of loose threads, making the connection between the inner threaded sleeve and the outer threaded rod more stable and firm, and also extending its service life.

[0017] 2. When the internal thread sleeve rotates, since the limiting and guiding member enters and engages with the inside of the limiting slideway, when the internal thread sleeve rotates, it will drive the rotating ring to rotate, avoiding the situation that the engagement of the limiting slider and the limiting slideway affects the normal rotation of the internal thread sleeve.

[0018] 3. For this utility model, screw the butterfly bolt into the internal thread connection hole so that the rubber block abuts against the outer wall of the outer threaded rod. The frictional resistance between them will strengthen the connection state between the internal thread sleeve and the outer threaded rod, preventing the internal thread sleeve from falling off the outer threaded rod. Moreover, due to the elastic property of the rubber block, when the rubber block abuts against the outer threaded rod, the rubber block will deform and be stuck on the thread of the outer threaded rod, achieving a better locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of this utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of a locking nut for a dumbbell according to this utility model.

[0021] Figure 2 It is a schematic diagram of the structure of the outer threaded rod of a locking nut for a dumbbell according to this utility model.

[0022] Figure 3 It is a schematic diagram of the structure of the limiting and guiding member of a locking nut for a dumbbell according to this utility model.

[0023] Figure 4 It is a schematic diagram of the structure of the locking nut end of a locking nut for a dumbbell according to this utility model.

[0024] Figure 5 It is a schematic diagram of the structure of the butterfly bolt of a locking nut for a dumbbell according to this utility model.

[0025] DESCRIPTION OF THE REFERENCE NUMERALS:

[0026] 1. Outer threaded rod; 11. Installation groove; 12. Limiting and guiding member; 121. Rotating ring; 122. Vertical connecting bar; 123. Limiting slider; 2. Locking nut end; 21. Internal thread sleeve; 22. Ring-shaped rotating plate; 23. Thumb concave cavity; 24. Limiting slideway; 25. Thread connection hole; 26. Butterfly bolt; 27. Rubber block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following provides a detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings of the specification.

[0028] Embodiment 1

[0029] Referring to Figures 1-5 , for the first embodiment of the present utility model, a locking nut for a dumbbell is provided. Such a locking nut for a dumbbell includes an outer threaded rod 1, and a locking nut end 2 is detachably installed on the outer threaded rod 1 by threading. An installation groove 11 is formed at the outer end of the outer threaded rod 1, and a limiting guide member 12 is installed inside the installation groove 11. The limiting guide member 12 includes two rotating limiting sliders 123.

[0030] The locking nut end 2 includes an internal threaded sleeve 21, and the internal threaded sleeve 21 is threadedly connected to the outer threaded rod 1. Limiting slideways 24 adapted to the limiting sliders 123 are formed on both sides of the inner wall of the internal threaded sleeve 21. The two limiting guide members 12 first enter the inside of the limiting slideways 24. At this time, the two limiting guide members 12 play a role in limiting the internal threaded sleeve 21, realizing the state of alignment and limitation between the outer threaded rod 1 and the internal threaded sleeve 21. When the internal threaded sleeve 21 is rotated, the threads on the internal threaded sleeve 21 and the outer threaded rod 1 can be accurately meshed together. The force transmission is more uniform, the internal threaded sleeve 21 is easier to rotate, and the wear of the threads on the internal threaded sleeve 21 and the outer threaded rod 1 is also reduced, avoiding the situation of loose threads, making the connection between the internal threaded sleeve 21 and the outer threaded rod 1 more stable and firm, and also extending its service life.

[0031] The limiting guide member 12 further includes a rotating ring 121 rotatably installed inside the installation groove 11 through a bearing. Vertical connecting bars 122 are welded on both sides of the inner wall of the rotating ring 121, and the limiting sliders 123 are welded on the vertical connecting bars 122. When the internal threaded sleeve 21 is rotated, since the limiting guide member 12 enters and is engaged with the inside of the limiting slideways 24, when the internal threaded sleeve 21 rotates, it will drive the rotating ring 121 to rotate, preventing the engagement of the limiting sliders 123 and the limiting slideways 24 from affecting the normal rotation of the internal threaded sleeve 21.

[0032] During use, when installing the internal threaded sleeve 21 onto the outer threaded rod 1, first make the two limiting guide members 12 enter the inside of the limiting slideways 24 first. At this time, the two limiting guide members 12 play a role in limiting the internal threaded sleeve 21, realizing the state of alignment and limitation between the outer threaded rod 1 and the internal threaded sleeve 21. When the internal threaded sleeve 21 is rotated, the threads on the internal threaded sleeve 21 and the outer threaded rod 1 can be accurately meshed together.

[0033] Embodiment 2

[0034] Referring toFigures 1-5 , which is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is as follows:

[0035] On one side of the outer wall of the internal thread sleeve 21, a threaded connection hole 25 is penetrated and opened. The internal thread sleeve 21 is threadedly installed with a wing bolt 26 through the threaded connection hole 25. When the wing bolt 26 is screwed into the internal of the threaded connection hole 25, the rubber block 27 abuts against the outer wall of the outer threaded rod 1. The frictional contact between them will strengthen the connection state between the internal thread sleeve 21 and the outer threaded rod 1, and prevent the internal thread sleeve 21 from falling off the outer threaded rod 1.

[0036] One end of the wing bolt 26 close to the internal thread sleeve 21 is bonded with a rubber block 27, and the thickness of the rubber block 27 is 0.5 cm. Due to the elastic performance of the rubber block 27, when the rubber block 27 abuts against the outer threaded rod 1, the rubber block 27 will deform and be stuck on the thread of the outer threaded rod 1, achieving a better locking effect.

[0037] A finger ring plate 22 is welded to one end of the internal thread sleeve 21 away from the outer threaded rod 1, and a circle of thumb concave cavities 23 is arranged on the outermost side of the internal thread sleeve 21.

[0038] The number of the thumb concave cavities 23 is six, and they are evenly distributed.

[0039] When holding, it can be directly stuck inside the thumb concave cavity 23, making it easier to drive the internal thread sleeve 21 to rotate.

[0040] During the use process, after the internal thread sleeve 21 rotates to the proper position, the wing bolt 26 is screwed into the internal of the threaded connection hole 25, so that the rubber block 27 abuts against the outer wall of the outer threaded rod 1. The frictional contact between them will strengthen the connection state between the internal thread sleeve 21 and the outer threaded rod 1.

[0041] The remaining structures are the same as those in Embodiment 1.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not restrictive. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A locking nut for dumbbells, characterized in that: It includes an external threaded rod (1), on which a locking nut end (2) is detachably installed by threading. An installation groove (11) is formed at the outer end of the external threaded rod (1), and a limiting and guiding member (12) is installed inside the installation groove (11). The limiting and guiding member (12) includes two rotating limiting sliders (123). The locking nut end (2) includes an internal threaded sleeve (21), and limiting sliding grooves (24) adapted to the limiting sliders (123) are formed on both sides of the inner wall of the internal threaded sleeve (21).

2. The lock nut for dumbbell according to claim 1, wherein: The limiting and guiding member (12) further includes a rotating ring (121) rotatably installed inside the installation groove (11) through a bearing. Vertical connecting strips (122) are welded on both sides of the inner wall of the rotating ring (121), and the limiting sliders (123) are welded on the vertical connecting strips (122).

3. The lock nut for dumbbell according to claim 2, characterized in that: A threaded connecting hole (25) is formed through one side of the outer wall of the internal threaded sleeve (21), and a butterfly bolt (26) is installed on the internal threaded sleeve (21) by threading through the threaded connecting hole (25).

4. A locking nut for dumbbells according to claim 3, characterized in that: A rubber block (27) is bonded to one end of the butterfly bolt (26) close to the internal threaded sleeve (21), and the thickness of the rubber block (27) is 0.5 cm.

5. A locking nut for dumbbells according to claim 4, characterized in that: A finger ring rotating plate (22) is welded to the end of the internal threaded sleeve (21) away from the external threaded rod (1), and a circle of thumb concave cavities (23) is arranged on the outermost side of the internal threaded sleeve (21).

6. The lock nut for dumbbells according to claim 5, characterized in that: The number of the thumb concave cavities (23) is six, and they are evenly distributed at equal intervals.

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