Dumbbell with adjustable balance weight

Abstract

The utility model provides a dumbbell capable of adjusting counter weight, which relates to the technical field of dumbbells and comprises a support rod, a plurality of counter weight blocks are arranged on two sides of the support rod, nuts are inserted into two sides of the support rod in a threaded manner, limiting devices are arranged on two sides of the support rod, each limiting device comprises a square tube, and the square tubes are connected with the counter weight blocks. The square tube is fixedly connected with the supporting rod, a first bolt is inserted into one side of the square tube in a threaded mode, a connecting plate is inserted into one side of the first bolt in a threaded mode, a limiting block is slidably connected to one side of the connecting plate, one side of the limiting block abuts against a nut, and a plurality of threaded holes are formed in one side of the limiting block. According to the dumbbell, the nuts on the two sides of the supporting rod can be limited through the limiting devices, the situation that when the nuts are used for a long time, the nuts are loosened on the two sides of the supporting rod, and then the nuts cannot be tightly attached to the balancing weights is avoided, and therefore the using effect of the dumbbell can be improved.

Description

Technical Field

[0001] This utility model relates to the field of dumbbells, and in particular to an adjustable weight dumbbell. Background Technology

[0002] Dumbbells are a simple piece of equipment used for strength training. Their main function is to increase muscle strength and improve body shape. Dumbbells are usually made of metal or other materials.

[0003] When using dumbbells, users grip the support bar with weights for strength training. To change the weight, weights are added or removed from both sides of the support bar, and then the nuts are turned to secure the weights to both ends of the support bar, thus adjusting the dumbbell's weight. Over time, the nuts can loosen on both sides of the support bar, preventing them from fitting tightly against the weights and affecting the dumbbell's effectiveness. Utility Model Content

[0004] The technical problem this invention aims to solve is that when the nut is used for a long time, it is easy for the nut to loosen on both sides of the support rod, which will cause the nut to not fit tightly with the counterweight, thus affecting the performance of the dumbbell.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: an adjustable weight dumbbell, including a support rod, several weight blocks are provided on both sides of the support rod, nuts are threaded into both sides of the support rod, and limiting devices are provided on both sides of the support rod. The limiting device includes a square tube, which is fixedly connected to the support rod. A first bolt is threaded into one side of the square tube, and a connecting plate is threaded into one side of the first bolt. A limiting block is slidably connected to one side of the connecting plate. One side of the limiting block abuts against the nuts. Several threaded holes are opened on one side of the limiting block. A second bolt is inserted into one side of the connecting plate, and one side of the second bolt is threadedly connected to the threaded holes on one side of the limiting block.

[0006] The aforementioned components achieve the following effects: When using dumbbells, the user grips the support rod with counterweights for strength training. To change the counterweight, counterweights are added or removed from both sides of the support rod. Then, the nuts are rotated to secure the counterweights to both ends of the support rod, thus adjusting the dumbbell's weight. When using the nuts, the connecting plate can be moved to insert into the square tube. The first bolt is then rotated to pass through the square tube and fix it to the connecting plate. Next, the limiting block on one side of the connecting plate is moved to accommodate counterweights of various thicknesses and the nut position, with one side of the limiting plate abutting against the nut. Then, the second bolt is rotated to pass through the connecting plate and contact the threaded hole on one side of the limiting block, thus fixing the limiting block's position and limiting the nut's position. By using this limiting device, the nuts on both sides of the support rod can be limited, preventing them from loosening over time and failing to fit tightly against the counterweights, thereby improving the dumbbell's effectiveness.

[0007] Preferably, a connecting rope is fixedly connected to one side of the first bolt, and one side of the connecting rope is fixedly connected to the connecting plate.

[0008] The effect achieved by the above components is to fix the first bolt to the connecting plate by using a connecting rope, thereby preventing the first bolt from being lost and affecting the subsequent use of the connecting plate.

[0009] Preferably, a trapezoidal block is fixedly connected to one side of the connecting plate, and the size of the trapezoidal block on the side away from the connecting plate is smaller than the size of the other side.

[0010] The effect achieved by the above components is to reduce the size of the connecting plate by using trapezoidal blocks, making it easier to insert the connecting plate into the square tube.

[0011] Preferably, a plurality of protruding blocks are fixedly connected to one side of the second bolt, and the plurality of protruding blocks are arranged at equal intervals on one side of the second bolt.

[0012] The effect achieved by the above-mentioned components is to increase the friction between the second bolt and the user by using the protruding block, making it easier for the user to turn the second bolt.

[0013] Preferably, a control block is fixedly connected to one side of the limiting block, and the size of the control block is adapted to the size of the limiting block.

[0014] The effect achieved by the above components is to increase the size of one side of the limit block by using the control block, making it easier for the user to move the limit block.

[0015] Preferably, an auxiliary device is provided on one side of the support rod. The auxiliary device includes a third bolt, one side of which is threadedly connected to the support rod. An auxiliary sleeve is threadedly connected to one side of the third bolt, and several rubber blocks are fixedly connected to one side of the auxiliary sleeve.

[0016] The effect achieved by the above components is as follows: when using the support rod, the auxiliary sleeve can be moved so that the auxiliary sleeve with the rubber block is fitted onto the support rod. Then, the third bolt is rotated so that the third bolt passes through the auxiliary sleeve and is fixed to the support rod. By using the auxiliary device, the friction between the user and the support rod can be increased, allowing the user to better grip the support rod for dumbbell use.

[0017] Preferably, a positioning block is fixedly connected to one side of the support rod, and the size of the positioning block is adapted to the size of the auxiliary block.

[0018] The effect achieved by the above components is to quickly locate the position of the auxiliary sleeve and the support rod by using the positioning block, and then facilitate subsequent fixing with the auxiliary sleeve using the third bolt.

[0019] Preferably, one side of the third bolt abuts against a washer, and one side of the washer abuts against an auxiliary sleeve.

[0020] The effect achieved by the above components is to increase the contact area between the auxiliary sleeve and the third bolt by using a shim, so that the third bolt can more firmly fix the auxiliary sleeve.

[0021] In summary, the beneficial effects of this utility model are as follows:

[0022] By using a limiting device, the nuts on both sides of the support rod can be limited, preventing them from loosening on both sides of the support rod during long-term use, which would prevent the nuts from fitting tightly with the counterweight, thus improving the dumbbell's performance. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the limiting device of this utility model;

[0026] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0027] Figure 4 This is a three-dimensional structural diagram of the auxiliary device of this utility model.

[0028] Legend: 1. Support rod; 2. Limiting device; 21. Square tube; 22. First bolt; 23. Connecting plate; 24. Limiting block; 25. Second bolt; 26. Threaded hole; 27. Connecting rope; 28. Trapezoidal block; 29. ​​Protruding block; 210. Control block; 3. Auxiliary device; 31. Third bolt; 32. Auxiliary sleeve; 33. Rubber block; 34. Positioning block; 35. Washer; 4. Counterweight; 5. Nut. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Example 1, Figures 1 to 4 The dumbbell shown includes a support rod 1, several counterweights 4 on both sides of the support rod 1, nuts 5 threaded into both sides of the support rod 1, and limiting devices 2 on both sides of the support rod 1.

[0032] Figures 1 to 4The limiting device 2 shown includes a square tube 21, which is fixedly connected to the support rod 1. A first bolt 22 is threaded into one side of the square tube 21, and a connecting plate 23 is threaded into one side of the first bolt 22. A limiting block 24 is slidably connected to one side of the connecting plate 23, and one side of the limiting block 24 abuts against a nut 5. Several threaded holes 26 are provided on one side of the limiting block 24. A second bolt 25 is inserted into one side of the connecting plate 23, and one side of the second bolt 25 is threadedly connected to the threaded holes 26 on one side of the limiting block 24. When using dumbbells, the user grips the support rod 1 with counterweights 4 for strength training. To change the counterweight, counterweights 4 are added or removed from both sides of the support rod 1, and then the nut 5 is rotated to fix the counterweights 4 to both ends of the support rod 1, thus adjusting the dumbbell's counterweight. When using nut 5, the connecting plate 23 can be moved to insert into the square tube 21. Then, the first bolt 22 is rotated to pass through the square tube 21 and fix it to the connecting plate 23. Then, the limiting block 24 on one side of the connecting plate 23 is moved to adapt to the position of the counterweight 4 and nut 5 of various thicknesses, and one side of the limiting plate abuts against nut 5. Then, the second bolt 25 is rotated to pass through the connecting plate 23 and contact the threaded hole 26 on one side of the limiting block 24. Then, the position of the limiting block 24 is fixed, and the position of nut 5 is limited. By using the limiting device 2, the nuts 5 on both sides of the support rod 1 can be limited, avoiding the nuts 5 from becoming loose on both sides of the support rod 1 during long-term use, which would cause the nuts 5 to not fit tightly against the counterweight 4, thereby improving the dumbbell's performance.

[0033] Figures 1 to 4 A connecting rope 27 is fixedly connected to one side of the first bolt 22, and the connecting rope 27 is fixedly connected to the connecting plate 23 on one side. The connecting rope 27 secures the first bolt 22 to the connecting plate 23, preventing the first bolt 22 from being lost and affecting the subsequent use of the connecting plate 23. A trapezoidal block 28 is fixedly connected to one side of the connecting plate 23, with the side of the trapezoidal block 28 furthest from the connecting plate 23 having a smaller dimension than the other side. The trapezoidal block 28 reduces the size of the connecting plate 23, making it easier to insert the square tube 21. Several protruding blocks 29 are fixedly connected to one side of the second bolt 25, and these protruding blocks 29 are equidistantly arranged on one side of the second bolt 25. The protruding blocks 29 increase the friction between the second bolt 25 and the user, making it easier for the user to rotate the second bolt 25. A control block 210 is fixedly connected to one side of the limiting block 24, and the size of the control block 210 is adapted to the size of the limiting block 24. By using control block 210, the size of one side of limit block 24 is increased, making it easier for the user to move limit block 24.

[0034] Figures 1 to 4The support rod 1 shown has an auxiliary device 3 on one side. The auxiliary device 3 includes a third bolt 31, one side of which is threaded to the support rod 1. An auxiliary sleeve 32 is threaded to one side of the third bolt 31, and several rubber blocks 33 are fixedly connected to one side of the auxiliary sleeve 32. When using the support rod 1, the auxiliary sleeve 32 can be moved so that the auxiliary sleeve 32 with the rubber blocks 33 is fitted onto the support rod 1. Then, the third bolt 31 is rotated so that it passes through the auxiliary sleeve 32 and is fixed to the support rod 1. By using the auxiliary device 3, the friction between the user and the support rod 1 can be increased, allowing the user to better grip the support rod 1 when using dumbbells.

[0035] Figures 1 to 4 A positioning block 34 is fixedly connected to one side of the support rod 1, and the size of the positioning block 34 is adapted to the size of the auxiliary block. The positioning block 34 is used to quickly position the auxiliary sleeve 32 and the support rod 1, facilitating subsequent fixing to the auxiliary sleeve 32 using the third bolt 31. A washer 35 abuts against one side of the third bolt 31, and another side of the washer 35 abuts against the auxiliary sleeve 32. The washer 35 increases the contact area between the auxiliary sleeve 32 and the third bolt 31, making the third bolt 31 more securely fix the auxiliary sleeve 32.

[0036] Working principle: When using dumbbells, the user holds the support rod 1 with the counterweight 4 to perform strength training. When changing the counterweight, the counterweight 4 is added or removed on both sides of the support rod 1. Then, the nut 5 is rotated to fix the counterweight 4 to both ends of the support rod 1 to complete the counterweight adjustment of the dumbbell. When using nut 5, the connecting plate 23 can be moved to insert into the square tube 21. Then, the first bolt 22 is rotated to pass through the square tube 21 and fix it to the connecting plate 23. Then, the limiting block 24 on one side of the connecting plate 23 is moved to adapt to the position of the counterweight 4 and nut 5 of various thicknesses, and one side of the limiting plate abuts against nut 5. Then, the second bolt 25 is rotated to pass through the connecting plate 23 and contact the threaded hole 26 on one side of the limiting block 24. Then, the position of the limiting block 24 is fixed, and the position of nut 5 is limited. By using the limiting device 2, the nuts 5 on both sides of the support rod 1 can be limited, avoiding the nuts 5 from becoming loose on both sides of the support rod 1 during long-term use, which would cause the nuts 5 to not fit tightly against the counterweight 4, thereby improving the dumbbell's performance.

[0037] When using the support rod 1, the auxiliary sleeve 32 can be moved so that the auxiliary sleeve 32 with the rubber block 33 is fitted onto the support rod 1. Then, the third bolt 31 is rotated so that the third bolt 31 passes through the washer 35 and the auxiliary sleeve 32 and is fixed to the support rod 1. By using the auxiliary device 3, the friction between the user and the support rod 1 can be increased, allowing the user to better grip the support rod 1 to use the dumbbell.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A dumbbell with adjustable counterweight, comprising a support rod (1), characterized in that: The support rod (1) has several counterweights (4) on both sides, nuts (5) are threaded into both sides of the support rod (1), and limiting devices (2) are provided on both sides of the support rod (1). The limiting device (2) includes a square tube (21), which is fixedly connected to the support rod (1). A first bolt (22) is threaded into one side of the square tube (21), and a connecting plate (23) is threaded into one side of the first bolt (22). A limiting block (24) is slidably connected to one side of the connecting plate (23), and one side of the limiting block (24) abuts against the nut (5). Several threaded holes (26) are opened on one side of the limiting block (24), and a second bolt (25) is inserted into one side of the connecting plate (23). One side of the second bolt (25) is threadedly connected to the threaded hole (26) on one side of the limiting block (24).

2. The adjustable weight dumbbell according to claim 1, characterized in that: A connecting rope (27) is fixedly connected to one side of the first bolt (22), and one side of the connecting rope (27) is fixedly connected to the connecting plate (23).

3. The adjustable weight dumbbell according to claim 2, characterized in that: A trapezoidal block (28) is fixedly connected to one side of the connecting plate (23), and the size of the trapezoidal block (28) on the side away from the connecting plate (23) is smaller than the size of the other side.

4. The adjustable weight dumbbell according to claim 3, characterized in that: A plurality of protruding blocks (29) are fixedly connected to one side of the second bolt (25), and the plurality of protruding blocks (29) are arranged at equal intervals on one side of the second bolt (25).

5. The adjustable weight dumbbell according to claim 4, characterized in that: A control block (210) is fixedly connected to one side of the limiting block (24), and the size of the control block (210) is adapted to the size of the limiting block (24).

6. The adjustable weight dumbbell according to claim 5, characterized in that: An auxiliary device (3) is provided on one side of the support rod (1). The auxiliary device (3) includes a third bolt (31). One side of the third bolt (31) is threadedly connected to the support rod (1). An auxiliary sleeve (32) is threadedly connected to one side of the third bolt (31). Several rubber blocks (33) are fixedly connected to one side of the auxiliary sleeve (32).

7. A dumbbell with adjustable counterweight according to claim 6, characterized in that: A positioning block (34) is fixedly connected to one side of the support rod (1), and the size of the positioning block (34) is adapted to the size of the auxiliary block.

8. The adjustable weight dumbbell according to claim 7, characterized in that: One side of the third bolt (31) abuts against a washer (35), and one side of the washer (35) abuts against an auxiliary sleeve (32).

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