Long nut convenient to twist
By decomposing the long nut into several short nuts and achieving a rotating connection through the fixture and connecting ring structure, the problem of long nuts being difficult to tighten with short wrench in a narrow space is solved, achieving the effect of easy tightening and ensuring full tightening.
Patent Information
- Application Number
- CN202421293862.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-06
AI Technical Summary
Long nuts are difficult to tighten with short wrenches in tight spaces, resulting in poor tightening effects.
A long nut composed of several short nuts is adopted. Through the removable fixing and connecting ring and ring groove structure, the rotating connection and axial displacement between the short nuts is achieved, so that a short wrench can be used to tighten all short nuts in sequence in a narrow space.
The friction force when tightening the long nuts is spread over several short nuts, making it easier to tighten. Using a shorter wrench in a narrow space can also ensure that the long nuts are fully tightened.
Smart Images
Figure CN222596526U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fasteners, and more specifically relates to a long nut which is convenient for twisting. Background Art
[0002] Nuts are used for connection and tightening and have a wide range of applications. Long nuts can increase the length of threaded engagement, thereby increasing the load-bearing capacity and seismic resistance of the connection. Correspondingly, long nuts can generate greater torque when tightened to achieve preload and final tightening force.
[0003] However, due to the large engagement area between the internal and external threads, the friction force when tightening the long nut is relatively large, and a long wrench is required for manual tightening. However, some narrow connection positions make it impossible to use a long wrench, and using a shorter wrench will make the tightening effect of the long nut worse. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a long nut which is easy to twist and is composed of a plurality of short nuts, and is also convenient for tightening the nut in a narrow space.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a long nut that is easy to twist, comprising a plurality of stacked short nuts, a detachable fixing piece is arranged between the plurality of short nuts, and the plurality of short nuts are rotationally connected to each other.
[0006] Furthermore, the fixing member includes a first connecting plate and a second connecting plate both of which have through holes in the middle, two fixing rods are arranged between the first connecting plate and the second connecting plate, one end of the fixing rod is fixedly connected to the first connecting plate, and the other end of the fixing rod is detachably connected to the second connecting plate, the first connecting plate and the second connecting plate are respectively located on both sides of the stacked short nuts, corresponding fixing through holes are arranged between the several short nuts, and the fixing rods pass through the fixing through holes.
[0007] Furthermore, a connecting ring with an L-shaped cross section is provided at one end of the short nut, and a ring groove corresponding to the connecting ring is provided at the other end of the short nut, and the stacked short nuts are rotated by the cooperation between the connecting ring and the ring groove.
[0008] Furthermore, the width of the inner part of the annular groove is greater than the thickness of the radial part of the connecting ring. After the connecting ring is matched with the annular groove, the radial part of the connecting ring contacts the upper bottom surface of the annular groove, and there is a gap between the lower surface of the connecting ring and the inner part of the annular groove, so that axial displacement can be achieved between two adjacent short nuts.
[0009] Furthermore, the second connecting plate includes two semicircular plates, an inserting plate is provided at the end of the fixing rod, and a first slot corresponding to the inserting plate and a second slot corresponding to the end of the fixing rod are provided on the semicircular groove of the semicircular plate.
[0010] Furthermore, a positioning block and a positioning groove are respectively arranged between the end surfaces of the two semicircular plates.
[0011] Compared with the prior art, the beneficial effect of the utility model is that the friction force when tightening the long nut is dispersed on several short nuts, tightening the short nuts is easier, and all the short nuts can be tightened in sequence using a shorter wrench in a narrow space, and finally the long nut can be completely tightened. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the external structure of the long nut that is convenient for twisting of the utility model;
[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the long nut which is convenient for twisting of the utility model;
[0014] Figure 3 It is a schematic diagram of the structure of a single short nut in a long nut that is easy to twist according to the utility model;
[0015] Figure 4 This is a schematic structural diagram of the second connecting plate in the long nut for easy twisting of the utility model.
[0016] Reference numerals: short nut 1; first connecting plate 2; second connecting plate 3; fixing rod 4; connecting ring 5; annular groove 6; semicircular plate 7; plug plate 8; first slot 9; second slot 10; positioning block 11; positioning groove 12. DETAILED DESCRIPTION
[0017] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.
[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.
[0019] Reference Figures 1 to 4 The utility model is further described.
[0020] A long nut which is convenient for twisting comprises a plurality of stacked short nuts 1. Removable fixing parts are arranged between the short nuts 1, and the short nuts 1 are rotationally connected to each other.
[0021] like Figure 2 As shown, in this example, preferably, the fixing member includes a first connecting plate 2 and a second connecting plate 3 both of which have through holes in the middle, two fixing rods 4 are arranged between the first connecting plate 2 and the second connecting plate 3, one end of the fixing rod 4 is fixedly connected to the first connecting plate 2, and the other end of the fixing rod 4 is detachably connected to the second connecting plate 3, the first connecting plate 2 and the second connecting plate 3 are respectively located on both sides of the stacked short nuts 1, and corresponding fixing through holes are arranged between the several short nuts 1, and the fixing rods 4 pass through the fixing through holes.
[0022] like Figure 2 As shown, in this example, preferably, one end of the short nut 1 is provided with a connecting ring 5 with an L-shaped cross-section, and the other end of the short nut 1 is provided with a ring groove 6 corresponding to the connecting ring 5, and the stacked short nuts 1 are rotated by cooperating between the connecting ring 5 and the ring groove 6.
[0023] like Figure 2 As shown, in this example, preferably, the width of the inside of the annular groove 6 is greater than the thickness of the radial portion of the connecting ring 5. After the connecting ring 5 is matched with the annular groove 6, the radial portion of the connecting ring 5 contacts the upper bottom surface of the annular groove 6, and there is a gap between the lower surface of the connecting ring 5 and the inside of the annular groove 6, so that the two adjacent short nuts 1 can be axially displaced, so that when tightening the previous short nut 1, it will not affect the driving of the next short nut 1, and similarly, when tightening the next short nut 1, it will not drive the rotation of the previous short nut 1.
[0024] like Figure 2 and Figure 4 As shown, in this example, preferably, the second connecting plate 3 includes two semicircular plates 7, an insert plate 8 is provided at the end of the fixing rod 4, and a first slot 9 corresponding to the insert plate 8 and a second slot 10 corresponding to the end of the fixing rod 4 are provided on the semicircular groove of the semicircular plate 7. When connecting the fixing rod 4 and the second connecting plate 3, the first slot 9 and the second slot 10 on the semicircular plate 7 are respectively aligned with the insert plate 8 on the fixing rod 4 and the end of the fixing rod 4, and then the semicircular plate 7 is radially extended from the side of the fixing rod 4, so that the insert plate 8 is extended into the first slot 9, and the end of the fixing rod 4 is extended into the second slot 10. When the two semicircular plates 7 are respectively connected to the two fixing rods 4, a plurality of stacked short nuts 1 can be combined into a long nut.
[0025] like Figures 1 to 3As shown, when the long nut is initially formed, a plurality of short nuts 1 are stacked together, and the end faces are in contact with each other. The first connecting plate 2 and the second connecting plate 3 are respectively located at both ends of the long nut. The fixing rod 4 passes through the fixing through hole on the short nut 1. When the fixing rod 4 is connected to the second connecting plate 3, the end faces of adjacent short nuts 1 can be in contact with each other, thereby avoiding axial displacement between the short nuts 1.
[0026] When using the long nut to connect the bolts, one end of the second connecting plate 3 is facing the connected part. When the long nut is rotated until the second connecting plate 3 is close to and in contact with the surface of the connecting part, the second connecting plate 3 is removed, and then the long nut is rotated again to make the short nut 1 closest to the connecting part contact with the connecting part and then start to tighten the long nut. When the long nut is pre-tightened as a whole, the first connecting plate 2 is removed from the other end of the long nut, and the fixing rod 4 is pulled out from the several short nuts 1 at the same time. Then, the several short nuts 1 can be tightened separately, and the order of separate rotation starts from the short nut 1 in contact with the connected part, and then the adjacent short nuts 1 are tightened in sequence until all the short nuts 1 are tightened.
[0027] The friction force originally generated when tightening the long nut is dispersed on several short nuts 1, so that tightening the short nuts 1 is easier. In a narrow space, all the short nuts 1 can be tightened in sequence using a shorter wrench, so that the long nut can be completely tightened eventually.
[0028] like Figure 4 As shown, in this example, preferably, a positioning block 11 and a positioning groove 12 are respectively provided between the end surfaces of the two semicircular plates 7 to facilitate the connection between the two semicircular plates 7 .
[0029] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A long nut that is easy to twist, characterized in that: It comprises a plurality of stacked short nuts, wherein detachable fixing parts are arranged between the plurality of short nuts, and the plurality of short nuts are rotationally connected with each other.
2. The long nut for easy twisting according to claim 1, characterized in that: The fixing member includes a first connecting plate and a second connecting plate both of which have through holes in the middle, two fixing rods are arranged between the first connecting plate and the second connecting plate, one end of the fixing rod is fixedly connected to the first connecting plate, and the other end of the fixing rod is detachably connected to the second connecting plate, the first connecting plate and the second connecting plate are respectively located on both sides of the stacked short nuts, corresponding fixing through holes are arranged between the several short nuts, and the fixing rods pass through the fixing through holes.
3. The long nut for easy twisting according to claim 2, characterized in that: A connecting ring with an L-shaped cross section is arranged at one end of the short nut, and a ring groove corresponding to the connecting ring is arranged at the other end of the short nut, and the stacked short nuts can rotate through the cooperation between the connecting ring and the ring groove.
4. The long nut for easy twisting according to claim 3, characterized in that: The width of the inner part of the annular groove is greater than the thickness of the radial part of the connecting ring. After the connecting ring is matched with the annular groove, the radial part of the connecting ring contacts the upper bottom surface of the annular groove, and there is a gap between the lower surface of the connecting ring and the inner part of the annular groove, so that axial displacement can be achieved between two adjacent short nuts.
5. The long nut for easy twisting according to claim 4, characterized in that: The second connecting plate comprises two semicircular plates, an inserting plate is arranged at the end of the fixing rod, and a first slot corresponding to the inserting plate and a second slot corresponding to the end of the fixing rod are arranged on the semicircular groove of the semicircular plate.
6. The long nut for easy twisting according to claim 5, characterized in that: A positioning block and a positioning groove are respectively arranged between the end surfaces of the two semicircular plates.