Anti-loose eccentric screw nut

Abstract

The utility model relates to an anti -drop eccentric screw nut, including screw rod, the outside of screw rod is sleeved with nut body through thread, the inside of screw rod is provided with anti -drop subassembly, and the anti -drop subassembly includes cavity, fixed strip, fixed groove and through groove, the cavity sets up in the inside of screw rod, the fixed groove sets up on the outer wall of nut body bottom, the through groove sets up in the inside of screw rod, and the fixed strip penetrates through the through groove. The utility model first according to the wall thickness of the equipment position of the eccentric screw nut to be used sets up the preset point position of the nut body fixed on the screw rod, when the nut body is screwed to the preset certain fixed point position on the screw rod, makes the fixed strip and inserts in the fixed groove and fixes the nut body, then fixes the nut body through the insert block, thereby can prevent the nut body from the loose phenomenon between the screw rod after the external equipment vibration, thereby can avoid the problem that the nut body falls off from the screw rod due to loosening.

Description

Technical Field

[0001] This utility model relates to the field of eccentric screw and nut technology, and in particular to an eccentric screw and nut designed to prevent loosening. Background Technology

[0002] Eccentric screws and nuts are a special type of fastener where the center of the thread is offset from the geometric center of the outer shape (i.e., they are not concentric). Rotation can be used to adjust the position of the connecting parts or to compensate for assembly errors. The existing eccentric screws and nuts have the following drawbacks in practical use: In the present technology, when eccentric screws and nuts are used on external equipment that generates vibration during operation, the screw rod and screw body will gradually loosen due to the vibration of the external equipment, and there is a risk that the nut body will fall off the screw rod. Utility Model Content

[0003] In view of the technical problem in the prior art, where the eccentric screw and nut used in the prior art can gradually loosen due to the vibration of the external equipment during operation, and there is a risk that the nut body will fall off the screw, this utility model provides an eccentric screw and nut that prevents it from falling off.

[0004] The technical solution adopted by this utility model is as follows: an eccentric screw nut that prevents detachment, comprising a screw rod, a nut body being threadedly sleeved on the outside of the screw rod, an anti-detachment component being provided inside the screw rod, the anti-detachment component comprising a cavity, a fixing strip, a fixing groove, and a through groove, the cavity being located inside the screw rod, the fixing groove being located on the outer wall of the bottom of the nut body, the through groove being located inside the screw rod, the fixing strip passing through the through groove and being snapped into the inside of the fixing groove, an insert block being slidably connected inside the cavity, and a slot being provided on the outer wall of the bottom of the fixing strip, the insert block being inserted into the inside of the slot, a pull rod being provided on the outer wall of the bottom of the insert block, and a pull ring located outside the bottom end of the pull rod being provided at the bottom end, and a spring connected to the insert block being provided inside the cavity.

[0005] Furthermore, the top of the screw rod is provided with a screw cap, and the screw rod is provided with an eccentric protrusion.

[0006] Furthermore, the screw rod is fitted with a washer one and a washer two, and anti-rotation protrusions are provided on the outer wall of the bottom of washer one and the outer wall of the top of washer two.

[0007] Furthermore, a reinforcing component is provided on the outer wall of both the screw cap and the nut body. The reinforcing component includes a reinforcing arc block, a movable plate, and a limiting rod. The two reinforcing arc blocks are respectively fixedly installed on the outer wall of the screw cap and the nut body.

[0008] Furthermore, the movable plate is slidably connected inside the reinforced arc-shaped block, and a rod is provided on the outer wall of the movable plate.

[0009] Furthermore, the limiting rod is located inside the reinforced arc-shaped block, and the moving plate is slidably sleeved on the outside of the limiting rod.

[0010] Furthermore, a compression screw is threaded into the outer wall of the reinforced arc block, and one end of the compression screw located inside the reinforced arc block is rotatably connected to the moving plate.

[0011] The beneficial effects of this utility model are: This invention uses an anti-loosening component. First, based on the wall thickness of the equipment where the eccentric screw and nut are to be used, a preset point for fixing the nut body on the screw rod is set. When the nut body is threaded onto the screw rod to a preset fixing point, a fixing strip is inserted into the fixing groove to fix the nut body. Then, the nut body is fixed by a plug block. This prevents the nut body from loosening from the screw rod after being vibrated by external equipment, thus avoiding the problem of the nut body falling off the screw rod due to loosening.

[0012] Secondly, this utility model uses a reinforcing component. Rotating the compression screw can drive the moving plate to move, and the moving plate will drive the insertion rod to move, so that the insertion rod is inserted into the preset insertion hole of the external device. This can prevent the screw cap and nut body from rotating on the external device, and lock the screw cap and nut body on the external device, which can further prevent the screw rod and nut body from loosening. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the entire utility model; Figure 2 This is a sectional perspective view of the anti-fall-off component of this utility model; Figure 3 This is a perspective view of the reinforcement component of this utility model; Figure 4 This is a perspective view of the gasket of this utility model.

[0014] The components in the diagram are labeled as follows: 1. Screw rod; 2. Nut body; 3. Anti-loosening component; 301. Cavity; 302. Fixing strip; 303. Fixing groove; 304. Through groove; 305. Insert block; 306. Slot; 307. Pull rod; 308. Spring; 309. Pull ring; 4. Screw cap; 5. Eccentric protrusion; 6. Washer one; 7. Washer two; 8. Anti-rotation protrusion; 9. Reinforcing component; 901. Reinforcing arc block; 902. Moving plate; 903. Insert rod; 904. Limiting rod; 905. Extrusion screw. Detailed Implementation

[0015] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", 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.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The following is in conjunction with the appendix Figures 1-4 The present invention will be further described below.

[0018] To address the problems existing in the background art, this application proposes the following technical solution: an eccentric screw and nut that prevents loosening.

[0019] The specific technical solution includes a screw rod 1, with a nut body 2 threadedly fitted onto the outside of the screw rod 1. An anti-detachment component 3 is installed inside the screw rod 1. The anti-detachment component 3 includes a cavity 301, a fixing strip 302, a fixing groove 303, and a through groove 304. The cavity 301 is located inside the screw rod 1, the fixing groove 303 is located on the outer wall of the bottom of the nut body 2, and the through groove 304 is located inside the screw rod 1. The fixing strip 302 passes through the through groove 304 and is engaged inside the fixing groove 303. An insert block is slidably connected inside the cavity 301. 305, and a slot 306 is provided on the outer wall of the bottom of the fixing strip 302. The insert block 305 is inserted into the inside of the slot 306. A pull rod 307 is provided on the outer wall of the bottom of the insert block 305. A pull ring 309 is provided at the bottom end of the pull rod 307, located outside the bottom end of the screw rod 1. A spring 308 connected to the insert block 305 is provided inside the cavity 301. This can strengthen and fix the nut body 2 and the screw rod 1, and prevent the nut body 2 from loosening and falling off the screw rod 1 after being vibrated by external equipment.

[0020] In specific implementations, such as Figure 1 As shown, a screw cap 4 is provided on the top of the screw rod 1, and an eccentric protrusion 5 is provided on the screw rod 1. The function of the eccentric protrusion 5 is to achieve fine-tuning of position or mechanical compensation by rotation adjustment.

[0021] In specific implementations, such as Figure 1 and Figure 4 As shown, a washer 6 and a washer 7 are respectively fitted on the outside of the screw rod 1. Anti-rotation protrusions 8 are provided on the outer wall of the bottom of washer 6 and the outer wall of the top of washer 7. Washer 6 can increase the contact area between the screw cap 4 and the external equipment, and washer 7 can increase the contact area between the nut body 2 and the external equipment, which can further prevent the screw rod 1 and the nut body 2 from rotating with the equipment.

[0022] In specific implementations, such as Figure 1 and Figure 3 As shown, both the screw cap 4 and the nut body 2 are provided with a reinforcing component 9 on their outer walls. The reinforcing component 9 includes a reinforcing arc block 901, a moving plate 902, and a limiting rod 904. The two reinforcing arc blocks 901 are fixedly installed on the outer walls of the screw cap 4 and the nut body 2, respectively. The reinforcing component 9 is used to lock the screw cap 4 and the nut body 2 to the external equipment, which can further prevent the screw rod 1 and the nut body 2 from loosening.

[0023] Furthermore, the movable plate 902 is slidably connected inside the reinforced arc block 901, and a rod 903 is provided on the outer wall of the movable plate 902. When the movable plate 902 moves, it will drive the rod 903 to move.

[0024] Furthermore, the limiting rod 904 is located inside the reinforced arc block 901, and the moving plate 902 is slidably sleeved on the outside of the limiting rod 904, so that the limiting rod 904 can make the moving plate 902 move linearly.

[0025] Furthermore, a compression screw 905 is threaded into the outer wall of the reinforcing arc block 901, and one end of the compression screw 905 located inside the reinforcing arc block 901 is rotatably connected to the moving plate 902. Rotating the compression screw 905 can push the moving plate 902 to move.

[0026] To ensure that those skilled in the art can fully understand the technical solution, this application provides the following overall overview: In use, first, set the preset position for fixing the nut body 2 on the screw rod 1 according to the wall thickness of the equipment where the eccentric screw and nut are to be used. Pass the screw rod 1 through the external equipment and insert the anti-rotation protrusion 8 on the washer 6 into the preset anti-rotation groove on the external equipment. Then, put the washer 7 on the screw rod 1. At this time, washer 6 and washer 7 are located on both sides of the mounting wall of the external equipment, and the anti-rotation protrusion 8 on washer 7 is inserted into the preset anti-rotation groove on the external equipment. Next, thread the nut 4 onto the screw rod 1. When the nut 4 is threaded to the preset fixing point on the external equipment, pull the insert block 305 down using the pull ring 309 to pass the fixing strip 302 through the through groove 304 and engage it inside the fixing groove 303. Release the pull ring 309. The elastic force of the spring 308 will push the insert block 305 to move, so that the insert block 305 is inserted into the slot 306, which can fix the fixing strip 302 and also fix the nut body 2. This can prevent the nut body 2 from loosening with the screw rod 1 when it is subjected to vibration from the external equipment, and thus avoid the problem of the nut body 2 falling off the screw rod 1 due to loosening. Then, rotate the pressing screw 905 on the reinforcing arc block 901 on the screw cap 4 and the pressing screw 905 on the reinforcing arc block 901 on the nut body 2 respectively. The pressing screw 905 can push the moving plate 902 and the insert rod 903 to move, so that the insert rod 903 can be inserted into the reserved socket in the external equipment, locking the screw cap 4 and the nut body 2 on the external equipment, which can further prevent the screw rod 1 and the nut body 2 from loosening.

[0027] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0028] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. An eccentric screw and nut designed to prevent loosening, characterized in that, The device includes a screw rod (1), to which a nut body (2) is threadedly fitted. An anti-detachment component (3) is provided inside the screw rod (1). The anti-detachment component (3) includes a cavity (301), a fixing strip (302), a fixing groove (303), and a through groove (304). The cavity (301) is located inside the screw rod (1). The fixing groove (303) is located on the outer wall of the bottom of the nut body (2). The through groove (304) is located inside the screw rod (1). The fixing strip (302) passes through the through groove (304). The fixing strip (302) is snapped into the inside of the fixing groove (303). The cavity (301) is slidably connected to the insert (305). The bottom outer wall of the fixing strip (302) is provided with a slot (306). The insert (305) is inserted into the inside of the slot (306). The bottom outer wall of the insert (305) is provided with a pull rod (307). The bottom end of the pull rod (307) is provided with a pull ring (309) located outside the bottom end of the screw rod (1). The cavity (301) is provided with a spring (308) connected to the insert (305).

2. The anti-loosening eccentric screw and nut according to claim 1, characterized in that, The top of the screw rod (1) is provided with a screw cap (4), and the screw rod (1) is provided with an eccentric protrusion (5).

3. The anti-loosening eccentric screw and nut according to claim 2, characterized in that, The screw rod (1) is fitted with a first washer (6) and a second washer (7) respectively. Anti-rotation protrusions (8) are provided on the outer wall of the bottom of the first washer (6) and the outer wall of the top of the second washer (7).

4. The anti-loosening eccentric screw and nut according to claim 3, characterized in that, The outer walls of the screw cap (4) and the nut body (2) are provided with a reinforcing component (9). The reinforcing component (9) includes a reinforcing arc block (901), a moving plate (902) and a limiting rod (904). The two reinforcing arc blocks (901) are respectively fixed on the outer walls of the screw cap (4) and the nut body (2).

5. The anti-loosening eccentric screw and nut according to claim 4, characterized in that, The movable plate (902) is slidably connected inside the reinforced arc block (901), and a plug rod (903) is provided on the outer wall of the movable plate (902).

6. The anti-loosening eccentric screw and nut according to claim 5, characterized in that, The limiting rod (904) is located inside the reinforced arc block (901), and the moving plate (902) is slidably sleeved on the outside of the limiting rod (904).

7. The anti-loosening eccentric screw and nut according to claim 6, characterized in that, A compression screw (905) is threaded into the outer wall of the reinforced arc block (901), and one end of the compression screw (905) located inside the reinforced arc block (901) is rotatably connected to the moving plate (902).

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