Carbon steel nut

Abstract

The utility model discloses a carbon steel nut which comprises a first inner cylinder, a plurality of second inner cylinders and an outer cylinder, the second inner cylinders and the outer cylinder are mutually overlapped and sleeved together, the innermost second inner cylinder is sleeved on the first inner cylinder, the outer cylinder is sleeved on the outermost second inner cylinder, one end of each second inner cylinder is provided with a conical base, one end face of the first inner cylinder is a conical surface, and the other end face of the first inner cylinder is a conical surface. A plurality of conical bases are arranged in the outer cylinder and matched with the conical base of the innermost second inner cylinder, a supporting base is arranged at one end of the outer cylinder, the inner surface of the supporting base is matched with the conical base of the outermost second inner cylinder, and the first inner cylinder, the conical bases and the supporting base jointly form an inner threaded hole; the fixing pieces for preventing the first inner cylinder, the second inner cylinders and the outer cylinder from rotating and sliding mutually are arranged among the first inner cylinder, the second inner cylinders and the outer cylinder, when the fixing pieces are detached after the nut is connected and the nut is subjected to overlarge load, the second inner cylinders deform, and the first inner cylinder is still connected to the bolt, so that the nut can be conveniently screwed off from the bolt in the follow-up process, and the detaching efficiency of the nut is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and more specifically relates to a carbon steel nut. Background Art

[0002] General nuts are used to thread onto bolts to fasten the connecting parts and the connected parts. Therefore, the nuts need to bear the load generated between the connecting parts and the connected parts. If the load borne by the nut exceeds the design standard of the nut, the nut may be deformed or even broken, causing it to lose its connection and fastening function. When the nut is deformed, it will also affect its internal thread and the external thread on the bolt, causing certain difficulties in the later disassembly of the deformed nut, and the nut disassembly efficiency is low. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a carbon steel nut which can reduce damage to the external thread of the bolt when it is subjected to excessive load and deformed, and also facilitates the removal of damaged and deformed nuts, thereby improving disassembly efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a carbon steel nut, comprising a first inner cylinder, a plurality of second inner cylinders and an outer cylinder stacked together, the innermost second inner cylinder is sleeved on the first inner cylinder, the outer cylinder is sleeved on the outermost second inner cylinder, a conical base is arranged at one end of the second inner cylinder, one end face of the first inner cylinder is a conical surface, and is matched with the conical base of the innermost second inner cylinder, a supporting base is arranged at one end of the outer cylinder, the inner surface of the supporting base is matched with the conical base of the outermost second inner cylinder, the first inner cylinder, the plurality of conical bases and the supporting base jointly form an internal threaded hole, and fixing parts are arranged between the first inner cylinder, the plurality of second inner cylinders and the outer cylinder to prevent them from rotating and sliding relative to each other.

[0005] Furthermore, the angle between the conical base and the second inner cylinder is greater than 90 degrees and not greater than 110 degrees.

[0006] Furthermore, the fixing part includes a plurality of fixing pins, and the first inner cylinder, the plurality of second inner cylinders and the outer cylinder are all provided with threaded holes that correspond to and adapt to each other, and the threaded holes on the first inner cylinder are blind holes, and the threaded holes on the second inner cylinder and the outer cylinder are through holes, the fixing pins are threadedly connected to the threaded holes, and the end surface of the fixing pins is flush with the outer side surface of the outer cylinder.

[0007] Furthermore, a slot, a cross slot or a special-shaped slot is provided on the end surface of the fixing pin.

[0008] Furthermore, the single-side thickness of the first inner tube is greater than that of the second inner tube.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: when the nut is fully tightened and connected, the fixing piece is removed from the nut; when the nut is subjected to a load exceeding the design load of the nut, the conical base below between the two adjacent conical bases will expand outwardly due to the wedge principle to absorb the load, and at the same time, the internal thread on the conical base is separated from the external thread on the bolt, so that the external thread on the bolt will not be damaged during the deformation of the nut, and when the second inner cylinder is deformed, since one end face of the first inner cylinder is a conical surface, it will still be connected to the bolt under the wedge principle, which is convenient for subsequently unscrewing the nut as a whole from the bolt, thereby improving the efficiency of nut disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the top view of the carbon steel nut of the utility model;

[0011] Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0012] Figure 3 for Figure 1 Side view from the center B direction.

[0013] Reference numerals: first inner tube 1; second inner tube 2; outer tube 3; conical base 4; supporting base 5; threaded hole 6; fixing pin 7; slot 8. DETAILED DESCRIPTION

[0014] 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.

[0015] 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.

[0016] Reference Figures 1 to 3 The utility model is further described.

[0017] A carbon steel nut comprises a first inner cylinder 1, a plurality of second inner cylinders 2 and an outer cylinder 3 which are stacked together, the innermost second inner cylinder 2 being sleeved on the first inner cylinder 1, the outer cylinder 3 being sleeved on the outermost second inner cylinder 2, a conical base 4 being arranged at one end of the second inner cylinder 2, one end face of the first inner cylinder 1 being a conical surface and being matched with the conical base 4 of the innermost second inner cylinder 2, a supporting base 5 being arranged at one end of the outer cylinder 3, the inner surface of the supporting base 5 being matched with the conical base 4 of the outermost second inner cylinder 2, the first inner cylinder 1, the plurality of conical bases 4 and the supporting base 5 forming an internal threaded hole 6 together, a fixing member being arranged between the first inner cylinder 1, the plurality of second inner cylinders 2 and the outer cylinder 3 to prevent them from rotating and sliding relative to each other.

[0018] like Figures 1 to 3 As described, the fixing member fixes the first inner cylinder 1, the plurality of second inner cylinders 2 and the outer cylinder 3, and the threaded hole 6 formed in the middle allows the nut to be used normally. When the nut is used, the supporting base 5 of the outer cylinder 3 is in close contact with the connecting member or the connected member, and when the nut is completely tightened and connected, the fixing member is removed from the nut. When the nut is subjected to an excessive load, the nut will be subjected to a force away from the connecting member or the connected member. Since there are overlapping conical bases 4 between the plurality of second inner cylinders 2, after being subjected to a load exceeding the design load of the nut, due to the lack of the fixing effect of the fixing member, the conical base 4 below between the two adjacent conical bases 4 will expand outwards due to the wedge principle to absorb the load, and at the same time, the internal thread on the conical base 4 is separated from the external thread on the bolt, so that the external thread on the bolt will not be damaged during the deformation of the nut, and when the second inner cylinder 2 is deformed, since one end face of the first inner cylinder 1 is a conical surface, it will still be connected to the bolt under the wedge principle, which is convenient for the subsequent unscrewing of the nut as a whole from the bolt, thereby improving the disassembly efficiency of the nut.

[0019] The wedge principle is that when the support base 5 is subjected to an upward force, its conical inner surface slides relative to the outer surface of the upper conical base 4, causing a crack to form on the support base 5, and the threaded opening on the support base 5 expands outward. The same principle applies between two adjacent conical bases 4.

[0020] Due to the complex mechanical environment when the nut is under load, several second inner cylinders 2 and outer cylinders 3 will not deform in a bottom-up order, that is, the supporting base 5 may not deform while the conical base 4 above is deformed, or several conical bases 4 may deform at intervals.

[0021] like Figure 1 As shown, in this example, preferably, the angle between the conical base 4 and the second inner tube 2 is greater than 90 degrees and not greater than 110 degrees, and may preferably be 95 degrees, 98 degrees, 100 degrees, 105 degrees or 110 degrees.

[0022] like Figure 1 As shown, in this example, preferably, the fixing member includes a plurality of fixing pins 7, and the first inner cylinder 1, the plurality of second inner cylinders 2 and the outer cylinder 3 are all provided with threaded holes 6 corresponding to and matching each other, and the threaded holes 6 on the first inner cylinder 1 are blind holes, and the threaded holes 6 on the second inner cylinder 2 and the outer cylinder 3 are through holes, the fixing pins 7 are threadedly connected to the threaded holes 6, and the end surface of the fixing pins 7 is flush with the outer side surface of the outer cylinder 3.

[0023] like Figure 1 and Figure 2 As shown, before the nut is connected, the fixing pin 7 is completely threadedly connected inside the nut, and the mutual rotation and sliding between the first inner cylinder 1, the plurality of second inner cylinders 2 and the outer cylinder 3 are fixed by threaded connection. When the nut is completely tightened, the fixing pin 7 is screwed out of the nut. At this time, the internal thread on the nut is tightly matched with the external thread on the bolt. When the nut is subjected to normal load and is not affected by other external forces, the first inner cylinder 1, the plurality of second inner cylinders 2 and the outer cylinder 3 will no longer rotate or slide relative to each other.

[0024] In this embodiment, preferably, a slot 8 (such as Figure 3 As shown) or a cross slot or a special-shaped slot, the fixing pin 7 can be screwed out through the slot and a special screwdriver.

[0025] like Figure 1 As shown, in this example, preferably, the single-side thickness of the first inner tube 1 is greater than that of the second inner tube 2, so as to improve the connection effect of the first inner tube 1 when deformed.

[0026] 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 carbon steel nut, characterized in that: It includes a first inner cylinder, a plurality of second inner cylinders and an outer cylinder stacked together, the innermost second inner cylinder is sleeved on the first inner cylinder, the outer cylinder is sleeved on the outermost second inner cylinder, a conical base is arranged at one end of the second inner cylinder, one end face of the first inner cylinder is a conical surface, and is matched with the conical base of the innermost second inner cylinder, a supporting base is arranged at one end of the outer cylinder, the inner surface of the supporting base is matched with the conical base of the outermost second inner cylinder, the first inner cylinder, the plurality of conical bases and the supporting base jointly form an internal threaded hole, and fixing parts are arranged between the first inner cylinder, the plurality of second inner cylinders and the outer cylinder to prevent them from rotating and sliding relative to each other.

2. The carbon steel nut according to claim 1, characterized in that: The angle between the conical base and the second inner cylinder is greater than 90 degrees and not greater than 110 degrees.

3. The carbon steel nut according to claim 1, characterized in that: The fixing member includes a plurality of fixing pins. The first inner cylinder, the plurality of second inner cylinders and the outer cylinder are all provided with threaded holes that correspond to and fit each other. The threaded holes on the first inner cylinder are blind holes, and the threaded holes on the second inner cylinder and the outer cylinder are through holes. The fixing pins are threadedly connected to the threaded holes, and the end surface of the fixing pins is flush with the outer side surface of the outer cylinder.

4. The carbon steel nut according to claim 3, characterized in that: The end surface of the fixing pin is provided with a slot, a cross slot or a special-shaped slot.

5. The carbon steel nut according to claim 1, characterized in that: The single side thickness of the first inner tube is greater than that of the second inner tube.

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