Hidden dumbbell with replaceable balancing weights

Abstract

The utility model relates to the technical field of dumbbells, and discloses a hidden dumbbell with replaceable balancing weights, which solves the problems that the balancing weights of the existing hidden dumbbell are mounted in protective covers at two ends, so that the balancing weights are very inconvenient to replace, and the use effect is poor, and comprises a grip, protective covers are fixedly installed at the two ends of the grip, a movable cover is rotatably installed on the surface of the grip, a connecting strip is fixedly installed on the lower side of the movable cover, a spring is fixedly installed on one side of the connecting strip, and the end, away from the connecting strip, of the spring is fixedly connected with the inner wall of the grip; a pull rod is fixedly mounted in the mounting groove, a rotating block is arranged on the upper portion of the middle of the interior of the grip, a rotating groove is formed in the top of the rotating block, and threaded sleeves are arranged in the two protective covers; according to the hidden dumbbell, the balancing weights are very convenient to replace, so that the labor amount of operators is reduced, and the working efficiency is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of dumbbells, in particular to a hidden dumbbell with replaceable counterweight blocks. Background Art

[0002] Hidden dumbbells are a type of equipment used to enhance muscle strength and shape the body lines. They are usually made of metal, with the counterweights hidden in protective covers at both ends, and can be used in various fitness programs. Hidden dumbbells can be used to exercise muscles in various parts of the body, including the chest muscles, back muscles, leg muscles, shoulders and arms. Hidden dumbbells come in a wide variety of types and weights, ranging from a few kilograms to dozens of kilograms. For beginners, it is recommended to choose relatively light hidden dumbbells for practice and gradually increase the weight and difficulty. For experienced fitness enthusiasts, heavier hidden dumbbells can be selected for higher-intensity training. The counterweights of existing hidden dumbbells are installed inside the protective covers at both ends, which makes it very inconvenient to replace the counterweights and their use effect is poor. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a hidden dumbbell with replaceable counterweights, which effectively solves the problem that the counterweights of the existing hidden dumbbells are installed inside the protective covers at both ends, which makes it very inconvenient to replace the counterweights and has poor use effect.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a hidden dumbbell with replaceable counterweights, comprising a handle, wherein both ends of the handle are fixedly installed with protective covers, and a movable cover is rotatably installed on the surface of the handle, a connecting strip is fixedly installed on the lower side of the movable cover, and a spring is fixedly installed on one side of the connecting strip, and the end of the spring away from the connecting strip is fixedly connected to the inner wall of the handle, the upper side of the movable cover is provided with a mounting groove, and a pull rod is fixedly installed inside the mounting groove, a rotating block is provided at the upper part of the middle part of the handle, and a rotating groove is provided on the top of the rotating block, threaded sleeves are provided inside the two protective covers, and baffles are fixedly installed on the ends of the two threaded sleeves away from each other, and four positioning rods are fixedly installed on the sides where the two baffles are close to each other, and four positioning holes are respectively provided on the ends of the two protective covers away from each other, and the positioning rods are respectively inserted into the inside of the positioning holes, and a transmission assembly is provided at the bottom of the rotating block, which is transmission-connected to the two threaded sleeves. When the rotating block rotates, the two threaded sleeves are driven to move by the transmission assembly, thereby quickly replacing the counterweights.

[0005] Preferably, the transmission assembly includes a first shaft rod, which is fixedly mounted on the bottom of the rotating block, a first shaft sleeve is rotatably mounted on the surface of the first shaft rod, and the first shaft sleeve is fixedly connected to the inside of the handle through two fixing rods, a first bevel gear is fixedly mounted on the bottom of the first shaft rod, a second bevel gear is meshedly connected to one side of the surface of the first bevel gear, a second shaft rod is fixedly mounted on the middle part of the second bevel gear, two second shaft sleeves are rotatably mounted on the surface of the second shaft rod, and the interiors of the two second shaft sleeves are fixedly connected to the inside of the handle through support rods.

[0006] Preferably, a third shaft is fixedly installed at both ends of the second shaft, a third sleeve is rotatably installed on the surface of the two third shafts, the surfaces of the two third sleeves are fixedly connected to the inside of the handle through a support rod, and a threaded rod is fixedly installed at one end of the two third shafts away from each other, and the two threaded rods are threadedly connected to the inside of the two threaded sleeves.

[0007] Preferably, two connecting rods are symmetrically fixedly installed on the surfaces of the two threaded sleeves, and a slider is fixedly installed on the end of the connecting rod away from the threaded sleeve. Two sliding grooves are symmetrically opened on the inner walls of the two protective covers, and four sliders are slidably installed inside the four sliding grooves respectively.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: when replacing the counterweight, the operator pulls the movable cover to rotate and open it through the pull rod in the installation slot. When the movable cover is rotated and opened, the spring is pulled by the connecting strip to extend. The spring can automatically pull the movable cover to reset due to its elasticity. Then the operator rotates the rotating block forwardly through the cooperation of the screwdriver and the rotating slot. When the rotating block rotates forward, it drives the first shaft rod to rotate along the inside of the first shaft sleeve. When the first shaft rod rotates, it drives the second bevel gear to rotate through the first bevel gear. When the second bevel gear rotates, it drives the second shaft rod to rotate along the inside of the two second shaft sleeves. When the two second shaft rods rotate, they both drive the third shaft rod to rotate along the inside of the third shaft sleeve.

[0009] When the two third shaft rods rotate, the two threaded sleeves are driven to move backward through the two threaded rods. When the two threaded sleeves move, they drive the slider to slide along the inside of the slide groove through the connecting rod, which increases the stability of the threaded sleeve when moving. When the two threaded sleeves move backward, they drive the two baffles to move backward, and drive the positioning rods to exit the inside of the positioning hole. When the two threaded sleeves are moved out of the inside of the protective cover, the operator can quickly replace the counterweight. After replacing the counterweight, the operator rotates the rotating block in the opposite direction through the cooperation of the screwdriver and the rotating groove. When the rotating block rotates in the opposite direction, the two threaded sleeves are driven to move toward each other through the two threaded rods. When the two threaded sleeves move toward each other, the counterweight is driven to the inside of the protective cover and pressed tightly, thereby quickly completing the installation. This makes the hidden dumbbell very convenient when replacing the counterweight, thereby reducing the operator's workload and reducing work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0011] In the attached figure:

[0012] Figure 1 This is a schematic diagram of the structure of the utility model of a hidden replaceable weight dumbbell;

[0013] Figure 2 This is a schematic diagram of the positioning rod and positioning hole structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the internal structure of the utility model's hidden replaceable weight dumbbell;

[0015] Figure 4 This is a schematic diagram of the internal structure of the handle of the utility model;

[0016] Figure 5 For this utility model Figure 4 A in the middle is an enlarged structural diagram;

[0017] In the figure: 1. handle; 2. protective cover; 3. movable cover; 4. connecting strip; 5. spring; 6. mounting slot; 7. pull rod; 8. rotating block; 9. rotating slot; 10. threaded sleeve; 11. baffle; 12. positioning rod; 13. first shaft rod; 14. first bushing; 15. fixing rod; 16. first bevel gear; 17. second bevel gear; 18. second shaft rod; 19. second bushing; 20. third shaft rod; 21. third bushing; 22. threaded rod; 23. connecting rod; 24. slider; 25. slide groove; 26. positioning hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Depend on Figures 1 to 5The utility model includes a handle 1, both ends of the handle 1 are fixedly installed with a protective cover 2, the surface of the handle 1 is rotatably installed with a movable cover 3, the lower side of the movable cover 3 is fixedly installed with a connecting strip 4, one side of the connecting strip 4 is fixedly installed with a spring 5, the end of the spring 5 away from the connecting strip 4 is fixedly connected to the inner wall of the handle 1, the upper side of the movable cover 3 is provided with a mounting groove 6, the interior of the mounting groove 6 is fixedly installed with a pull rod 7, the upper part of the middle part of the interior of the handle 1 is provided with a rotating block 8, the top of the rotating block 8 is provided with a rotating groove 9, and the interiors of the two protective covers 2 are provided with a There are threaded sleeves 10, and the ends of the two threaded sleeves 10 that are away from each other are fixedly installed with baffles 11. The sides of the two baffles 11 that are close to each other are fixedly installed with four positioning rods 12. The ends of the two protective covers 2 that are away from each other are respectively provided with four positioning holes 26. The positioning rods 12 are respectively inserted into the inside of the positioning holes 26. A transmission assembly is provided at the bottom of the rotating block 8, and the transmission assembly is connected to the two threaded sleeves 10. When the rotating block 8 rotates, the two threaded sleeves 10 are driven to move through the transmission assembly, so that the counterweight block can be quickly replaced.

[0020] When replacing the counterweight, the operator pulls the movable cover 3 through the pull rod 7 in the installation slot 6 to rotate it open. When the movable cover 3 is rotated open, the spring 5 is pulled by the connecting strip 4 to extend. The spring 5 can automatically pull the movable cover 3 to reset due to its elasticity. Then the operator rotates the rotating block 8 forward by cooperating with the screwdriver and the rotating slot 9. When the rotating block 8 rotates forward, it drives the transmission component to run forward. When the transmission component runs forward, it drives the two threaded sleeves 10 to move backward. When the two threaded sleeves 10 move backward, they both drive the two baffles 11 to move backward, and both drive the positioning rod 12 to exit the positioning hole. 26, when the two threaded sleeves 10 are moved out from the inside of the protective cover 2, the operator can quickly replace the counterweight; after the counterweight is replaced, the operator rotates the rotating block 8 in the opposite direction through the cooperation of the screwdriver and the rotating slot 9. When the rotating block 8 rotates in the opposite direction, the two threaded sleeves 10 are driven to move toward each other through the transmission assembly. When the two threaded sleeves 10 move toward each other, they drive the counterweight to the inside of the protective cover 2 and press it tightly, thereby quickly completing the installation; this makes the hidden dumbbell very convenient when replacing the counterweight, thereby reducing the operator's workload and improving work efficiency.

[0021] The transmission assembly includes a first shaft rod 13, which is fixedly mounted on the bottom of the rotating block 8. A first shaft sleeve 14 is rotatably mounted on the surface of the first shaft rod 13. The first shaft sleeve 14 is fixedly connected to the inside of the handle 1 through two fixing rods 15. A first bevel gear 16 is fixedly mounted on the bottom of the first shaft rod 13. A second bevel gear 17 is meshed and connected to one side of the surface of the first bevel gear 16. A second shaft rod 18 is fixedly mounted on the middle part of the second bevel gear 17. Two second shaft sleeves 19 are rotatably mounted on the surface of the second shaft rod 18. The interiors of the two second shaft sleeves 19 are fixedly connected to the interior of the handle 1 through support rods; both ends of the second shaft rod 18 are fixed A third shaft rod 20 is installed, and a third shaft sleeve 21 is rotatably installed on the surface of the two third shaft rods 20. The surfaces of the two third shaft sleeves 21 are fixedly connected to the inside of the handle 1 through a support rod. The ends of the two third shaft rods 20 away from each other are fixedly installed with a threaded rod 22, and the two threaded rods 22 are threadedly connected to the inside of the two threaded sleeves 10; two connecting rods 23 are symmetrically fixedly installed on the surfaces of the two threaded sleeves 10, and a slider 24 is fixedly installed on the end of the connecting rod 23 away from the threaded sleeve 10. The inner walls of the two protective covers 2 are symmetrically provided with two sliding grooves 25, and the four sliders 24 are respectively slidably installed in the inside of the four sliding grooves 25.

[0022] When the rotating block 8 rotates forward, it drives the first shaft rod 13 to rotate along the inside of the first shaft sleeve 14. When the first shaft rod 13 rotates, it drives the second bevel gear 17 to rotate through the first bevel gear 16. When the second bevel gear 17 rotates, it drives the second shaft rod 18 to rotate along the inside of the two second shaft sleeves 19. When the two second shaft rods 18 rotate, they both drive the third shaft rod 20 to rotate along the inside of the third shaft sleeve 21. When the two third shaft rods 20 rotate, the two threaded sleeves 10 are driven to move backwards through the two threaded rods 22. When the two threaded sleeves 10 move, they drive the slider 24 to slide along the inside of the slide groove 25 through the connecting rod 23, thereby increasing the stability of the threaded sleeve 10 when moving; when the rotating block 8 rotates reversely, the two threaded sleeves 10 can be driven to move toward each other through the two threaded rods 22.

Claims

1. A dumbbell with a hidden replaceable weight block, comprising a handle (1), characterized in that: Both ends of the handle (1) are fixedly mounted with protective covers (2), the surface of the handle (1) is rotatably mounted with a movable cover (3), the lower side of the movable cover (3) is fixedly mounted with a connecting strip (4), one side of the connecting strip (4) is fixedly mounted with a spring (5), the end of the spring (5) away from the connecting strip (4) is fixedly connected to the inner wall of the handle (1), the upper side of the movable cover (3) is provided with a mounting groove (6), the interior of the mounting groove (6) is fixedly mounted with a pull rod (7), the upper part of the middle part of the interior of the handle (1) is provided with a rotating block (8), the top of the rotating block (8) is provided with a rotating groove (9), the interiors of the two protective covers (2) are both A threaded sleeve (10) is provided, and a baffle (11) is fixedly installed on the ends of the two threaded sleeves (10) away from each other, and four positioning rods (12) are fixedly installed on the sides of the two baffles (11) close to each other. Four positioning holes (26) are respectively opened at the ends of the two protective covers (2) away from each other, and the positioning rods (12) are respectively inserted into the inside of the positioning holes (26). A transmission component is provided at the bottom of the rotating block (8), and the transmission component is connected to the two threaded sleeves (10). When the rotating block (8) rotates, the two threaded sleeves (10) are driven to move through the transmission component, so that the counterweight block can be quickly replaced.

2. A dumbbell with hidden replaceable weights according to claim 1, characterized in that: The transmission assembly comprises a first shaft (13), the first shaft (13) being fixedly mounted on the bottom of the rotating block (8), a first shaft sleeve (14) being rotatably mounted on the surface of the first shaft (13), the first shaft sleeve (14) being fixedly connected to the interior of the handle (1) via two fixing rods (15), a first bevel gear (16) being fixedly mounted on the bottom of the first shaft (13), a second bevel gear (17) being meshed and connected to one side of the surface of the first bevel gear (16), a second shaft (18) being fixedly mounted on the middle of the second bevel gear (17), two second shaft sleeves (19) being rotatably mounted on the surface of the second shaft (18), the interiors of the two second shaft sleeves (19) being fixedly connected to the interior of the handle (1) via support rods.

3. The hidden dumbbell with replaceable counterweight according to claim 2, characterized in that: A third shaft (20) is fixedly mounted on both ends of the second shaft (18); a third shaft sleeve (21) is rotatably mounted on the surfaces of the two third shafts (20); the surfaces of the two third shaft sleeves (21) are fixedly connected to the inside of the handle (1) through a support rod; a threaded rod (22) is fixedly mounted on the ends of the two third shafts (20) that are away from each other; the two threaded rods (22) are threadedly connected to the inside of the two threaded sleeves (10).

4. The hidden dumbbell with replaceable counterweight according to claim 3, characterized in that: Two connecting rods (23) are symmetrically fixedly installed on the surfaces of the two threaded sleeves (10), and a slider (24) is fixedly installed on one end of the connecting rod (23) away from the threaded sleeve (10). Two sliding grooves (25) are symmetrically opened on the inner walls of the two protective covers (2), and the four sliders (24) are slidably installed inside the four sliding grooves (25).

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