Locking nut and fitness equipment

Abstract

The utility model discloses a locking nut and body -building equipment, locking nut is including the main body with connecting hole, is provided with the internal thread that cooperates with the outer thread on the pole body on the inner wall of connecting hole, the outside of main body is provided with the opening of communicating with connecting hole, is provided with connecting shaft and spanner at the opening, the spanner is rotatably connected with connecting shaft, the spanner has the compression part on, makes the compression part enter into the compression pole body in connecting hole or makes the compression part exit connecting hole through rotating the spanner, the advantage is that locking effect is better.

Description

Technical Field

[0001] This utility model belongs to the technical field of fitness equipment auxiliary products, and in particular relates to a locking nut and fitness equipment. Background Technology

[0002] A dumbbell is a type of fitness equipment that generally consists of a bar, several weight plates, and two locking nuts. The bar has external threads at both ends, and the weight plates are fitted onto the ends of the bar and locked in place by the locking nuts. During training, because dumbbells require frequent up-and-down and left-and-right movements, the bar and the weight plates at its ends are subjected to vibration and impact. This can cause the locking nuts to loosen, posing a safety hazard.

[0003] To address this, a dumbbell nut, as disclosed in application number CN2015204930847, uses a locking nut (similar to a wing screw) added to the side of the dumbbell nut body. The locking nut abuts against the straight rod to achieve secondary locking, thereby improving the locking effect. However, in this technical solution, the locking nut is also connected to the mounting hole by a thread, which may still loosen and separate from the straight rod under vibration and impact, thus the locking effect needs to be improved. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a locking nut and fitness equipment with a good locking effect.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a locking nut, comprising a main body having a connecting hole, wherein the inner wall of the connecting hole is provided with an internal thread that mates with the external thread on the rod body, and the outer side of the main body is provided with an opening communicating with the connecting hole, wherein a connecting shaft and a wrench are provided at the opening, the wrench is rotatably connected to the connecting shaft, and the wrench has a clamping part, wherein rotating the wrench causes the clamping part to extend into the connecting hole to clamp the rod body, or causes the clamping part to retract from the connecting hole.

[0006] Preferably, the clamping part is provided with threads, the threads and the internal thread are located on the same helix, and the width of the threads is greater than the width of the internal thread threads.

[0007] Preferably, the clamping part includes an elastic pad.

[0008] Preferably, the wrench is provided with a connecting groove, and the back of the elastic pad is provided with a connector, which is adapted to the connecting groove.

[0009] Preferably, the connecting groove extends through the side of the wrench on at least one side, and the connector slides into the connecting groove.

[0010] Preferably, the wrench includes a rotating part and a gripping part, the rotating part is provided with a shaft hole, the connecting shaft passes through the shaft hole, and the clamping part is provided on the rotating part.

[0011] Preferably, the rotating part and the gripping part are connected by a connecting arm.

[0012] Preferably, the main body is provided with a slot and the gripping part is provided with a hook. When the wrench is rotated to allow the pressing part to extend into the connecting hole, the hook engages with the slot.

[0013] Preferably, the axis of the connecting shaft is parallel to the axis of the connecting hole.

[0014] And a fitness device, comprising a rod, a plurality of counterweights and two locking nuts as described above, wherein the two ends of the rod are provided with external threads, the plurality of counterweights are symmetrically mounted on the rod, and the two locking nuts correspond one-to-one with the two ends of the rod, the locking nuts being used to lock the counterweights located on the same side onto the rod.

[0015] Compared with the prior art, the advantages of this utility model are: 1. By setting an opening, connecting shaft and wrench on the main body, after the main body and the rod are threadedly connected, the wrench can be turned to make the clamping part extend into the connecting hole and radially clamp the rod, thereby forming a mechanical additional locking structure on the basis of the threaded connection, that is, secondary fastening, which helps to improve the locking effect. 2. Compared with the existing technology that achieves secondary locking by adding a threaded structure, the secondary fastening in this technology is achieved by turning a wrench, which does not rely on the friction of the threaded pair itself. This can effectively prevent loosening under vibration and impact conditions, and the locking effect is more reliable. 3. Users can directly rotate the wrench to insert or remove the clamping part. The operation is simple and requires no additional tools, making it easy to quickly adjust and maintain the fitness equipment during use. 4. This technical solution is an improvement on the traditional locking nut structure. It has a compact overall structure, simple manufacturing process, and good practical value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the locking nut structure in this utility model. Figure 1 ; Figure 2 This is an exploded view of the locking nut in this utility model; Figure 3 This is a schematic diagram of the locking nut structure in this utility model. Figure 2 ; Figure 4 This is a partial structural diagram of the fitness equipment in this utility model; Figure 5 This is a schematic diagram of the structure of the wrench in this utility model. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the wrench in this utility model. Figure 2 ; Figure 7 This is an exploded structural diagram of the wrench in this utility model.

[0017] In the diagram: 1. Locking nut; 11. Main body; 111. Connecting hole; 1111. Internal thread; 112. Opening; 113. Slot; 114. Anti-slip texture; 2. Connecting shaft; 3. Wrench; 31. Pressing part; 311. Thread; 312. Elastic washer; 313. Connecting head; 32. Rotating part; 321. Shaft hole; 322. Connecting groove; 33. Grip part; 331. Hook; 34. Connecting arm; 5. Rod; 51. External thread. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Example 1: As Figures 1 to 5 As shown, a locking nut includes a main body 11 with a connecting hole 111. The inner wall of the connecting hole 111 is provided with an internal thread 1111 that mates with the external thread 41 on the rod body 4. The outer side of the main body 11 is provided with an opening 112 that communicates with the connecting hole 111. A connecting shaft 2 and a wrench 3 are provided at the opening 112. The wrench 3 is rotatably connected to the connecting shaft 2. The wrench 3 has a pressing part 31. By rotating the wrench 3, the pressing part 31 can be inserted into the connecting hole 111 to press the rod body 4, or the pressing part 31 can be extended out of the connecting hole 111.

[0021] In this embodiment, the wrench 3 includes a rotating part 32 and a gripping part 33. The rotating part 32 is provided with a shaft hole 321, through which the connecting shaft 2 passes. The clamping part 31 is provided on the rotating part 32. The user rotates the rotating part 32 by gripping the gripping part 33, causing the clamping part 31 to extend into or retract from the connecting hole 111. The structure is simple and easy to operate.

[0022] In this embodiment, the axis of the connecting shaft 2 is parallel to the axis of the connecting hole 111. When the wrench 3 rotates, the movement trajectory of the clamping part 31 is close to the helix of the internal thread 1111, which helps to reduce the damage that the clamping part 31 may cause to the external thread 41 on the rod body 4.

[0023] In this embodiment, the outer surface of the main body 11 is provided with anti-slip texture 114, which can improve friction so that the user can twist the main body 11.

[0024] In use, first, the main body 11 is fitted onto the end of the rod 4. The main body 11 is threadedly connected to the external thread 41 on the rod 4 via the internal thread 1111. After the main body 11 is moved to the designated position, the wrench 3 is turned to allow the clamping part 31 to extend into the connecting hole 111 and radially clamp the rod 4, forming a mechanical additional locking structure on the basis of the threaded connection. This additional locking structure does not rely on the friction of the threaded pair itself and can effectively prevent loosening under vibration and impact conditions, making the locking effect more reliable. When it is necessary to add or remove counterweights, first turn the wrench 3 to allow the clamping part 31 to exit the connecting hole 111 to unlock, and then rotate the main body 11 to detach it from the rod 4.

[0025] Example 2: Figures 3 to 5 As shown, the rest of the parts are the same as in Embodiment 1, except that the clamping part 31 is provided with a thread 311. The thread 311 and the internal thread 1111 are located on the same helical line, and correspondingly, the thread 311 and the external thread 41 on the rod body 4 are also located on the same helical line. Furthermore, the width of the thread 311 is greater than the width of the thread of the internal thread 1111. When the clamping part 31 extends into the connecting hole 111 and radially clamps the rod body 4, the thread 311 on the clamping part 31 will extend into the thread groove of the external thread 41 on the rod body 4, and the thread 311 and the thread groove will have an interference fit. Compared with the clamping part 31 without the thread 311 structure, the addition of the thread 311 helps to increase the contact area between the clamping part 31 and the rod body 4, and improve the reliability of locking.

[0026] Example 3: Figure 6 and Figure 7 As shown, the rest of the parts are the same as in Embodiment 1, except that the pressing part 31 includes an elastic pad 312, which may be made of rubber. When the elastic pad 312 is inserted into the connecting hole 111, the elastic pad 312 is clamped between the rotating part 32 and the rod 4 and undergoes elastic deformation, thereby forming a radial pressing force on the rod 4.

[0027] In this embodiment, the rotating part 32 of the wrench 3 is provided with a connecting groove 322, and the back of the elastic pad 312 is provided with a connector 313, which is adapted to the connecting groove 322. The connector 313 and the connecting groove 322 can be snap-fitted or glued together, and the connector 313 is preferably integrally formed with the elastic pad 312 for easy one-time processing.

[0028] Example 4: Figure 6 and Figure 7 As shown, the rest is the same as in Embodiment 3, except that the connecting groove 322 extends through the side of the rotating part 32 in the wrench 3 on at least one side, and the connector 313 slides into the connecting groove 322 for easy installation. The connecting groove 322 has an L-shaped cross-section, or a dovetail groove, to prevent the connector from falling out of the connecting groove 322.

[0029] It should be noted that the connector 313 and the elastic pad 312 are integrally formed. At this time, the connector 313 is also made of rubber. After the connector 313 and the connecting groove 322 are assembled together, there is a certain friction between the two, and the connector 313 is not easy to slide out of the connecting groove 322.

[0030] Example 5: Figure 3 and Figure 5 As shown, the rest of the parts are the same as in Embodiment 1, except that the rotating part 32 and the gripping part 33 are connected by a connecting arm 34. By adding the connecting arm 34 to extend the torque, the user can lock or unlock more easily.

[0031] In this embodiment, the main body 11 is provided with a slot 113 and the gripping part 33 is provided with a hook 331. When the wrench 3 is rotated so that the pressing part 31 extends into the connecting hole 111, the hook 331 engages with the slot 113, which can limit the position of the wrench 3 and effectively suppress the wrench 3 from rotating in the opposite direction under vibration or impact, thereby preventing the pressing part 31 from accidentally coming out of the connecting hole 111 and further improving the stability of the locking structure.

[0032] Example 6: Figure 4 As shown, a fitness device includes a rod 4, several counterweights (not shown in the figure) and two locking nuts 1 of the above embodiment. The two ends of the rod 4 are provided with external threads 41. Several counterweights are symmetrically installed on the rod 4. The two locking nuts 1 correspond one-to-one with the two ends of the rod 4. The locking nuts 1 are used to lock the counterweights located on the same side onto the rod 4.

[0033] It should be noted that bar 4 can be either a dumbbell bar or a barbell bar.

[0034] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A locking nut, comprising a body (11) having a connecting hole (111), wherein the inner wall of the connecting hole (111) is provided with an internal thread (1111) that mates with an external thread (41) on a rod (4), characterized in that: The outer side of the main body (11) is provided with an opening (112) communicating with the connecting hole (111). A connecting shaft (2) and a wrench (3) are provided at the opening (112). The wrench (3) is rotatably connected to the connecting shaft (2). The wrench (3) has a pressing part (31). By rotating the wrench (3), the pressing part (31) is inserted into the connecting hole (111) to press the rod body (4), or the pressing part (31) is removed from the connecting hole (111).

2. A locking nut according to claim 1, characterized in that: The clamping part (31) is provided with a thread (311), the thread (311) and the internal thread (1111) are located on the same helical line, and the width of the thread (311) is greater than the width of the thread of the internal thread (1111).

3. A locking nut according to claim 1, characterized in that: The pressing part (31) includes an elastic pad (312).

4. A locking nut according to claim 3, characterized in that: The wrench (3) is provided with a connecting groove (322), and the elastic pad (312) is provided with a connector (313) on the back side, and the connector (313) is adapted to the connecting groove (322).

5. A locking nut according to claim 4, characterized in that: The connecting groove (322) extends through the side of the wrench (3) on at least one side, and the connector (313) slides in conjunction with the connecting groove (322).

6. A locking nut according to claim 1, characterized in that: The wrench (3) includes a rotating part (32) and a gripping part (33). The rotating part (32) is provided with a shaft hole (321), the connecting shaft (2) passes through the shaft hole (321), and the clamping part (31) is provided on the rotating part (32).

7. A locking nut according to claim 6, characterized in that: The rotating part (32) and the gripping part (33) are connected by a connecting arm (34).

8. A locking nut according to claim 6, characterized in that: The main body (11) is provided with a slot (113) and the gripping part (33) is provided with a hook (331). When the wrench (3) is rotated to make the pressing part (31) extend into the connecting hole (111), the hook (331) engages with the slot (113).

9. A locking nut according to claim 1, characterized in that: The axis of the connecting shaft (2) is parallel to the axis of the connecting hole (111).

10. A fitness equipment comprising a rod (4) and a plurality of counterweights, wherein the two ends of the rod (4) are provided with external threads (41), and the plurality of counterweights are symmetrically mounted on the rod (4), characterized in that: It also includes two locking nuts (1) as described in any one of claims 1-9, the two locking nuts (1) corresponding one-to-one with the two ends of the rod (4), the locking nuts (1) being used to lock the counterweights located on the same side onto the rod (4).

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