CN220248591U

CN220248591U - Splicing bolt made of carbon-carbon composite material

Info

Publication number: CN220248591U
Application number: CN202321891785.7U
Authority: CN
Inventors: 殷勇; 陈斌; 张资赫
Original assignee: Hunan Jinchuang New Material Co ltd
Current assignee: Hunan Jinchuang New Material Co ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2023-12-26
Anticipated expiration: 2033-07-18

Abstract

The utility model discloses a splicing bolt of a carbon-carbon composite material, which relates to the technical field of bolts and comprises the following components: nut, screw, and stopper; the inner side wall of the nut is provided with a nut reverse thread and a nut semicircular groove; the outer side wall of the screw is provided with a screw reverse thread and a screw semicircular groove; the nut reverse threads correspond to the screw reverse threads; the stop piece is arranged in a circular groove formed by aligning the nut semicircular groove with the screw semicircular groove, internal threads are arranged in the nut semicircular groove and the screw semicircular groove, and external threads corresponding to the internal threads are arranged on the stop piece. The bolt provided by the utility model is convenient to assemble and stable in connection, can be used for separately processing and manufacturing nuts and screws, improves the production efficiency, saves blanks, reduces the cost and realizes batch production.

Description

Splicing bolt made of carbon-carbon composite material

Technical Field

The utility model belongs to the technical field of bolts, and particularly relates to a carbon-carbon composite material spliced bolt.

Background

Most ceramics and high temperature alloys have a rapid deterioration in mechanical properties such as tensile strength at temperatures exceeding 750 ℃, so that the problem of short life and instantaneous failure often occurs between bolted joints installed at high temperatures. Moreover, the traditional bolt and nut connection sometimes has loosening phenomenon, which affects the use.

The carbon/carbon composite material, although having a lower load bearing capacity than the corresponding metal, is higher than the corresponding graphite member. The bolt made of the carbon/carbon composite material is used in a high-temperature and harsh chemical environment, can ensure structural stability at high temperature, is fastened at high temperature due to anisotropic thermal expansion coefficient, and adopts a unique fiber braiding and a special matrix treatment method to obtain the thread shear strength meeting performance requirements. The main characteristics are as follows: high tensile strength, high modulus, elastic modulus of more than 240GPa, small density and being one fourth of steel. However, the existing carbon fiber bolts are mostly formed integrally, and the blank used in the manufacturing process of the integrally formed carbon fiber bolts is large in dosage and high in manufacturing cost.

Disclosure of Invention

In order to solve the problems of large dosage and high cost of the existing carbon fiber bolt integrated formed blank, the utility model provides the carbon-carbon composite material spliced bolt which is convenient to assemble and stable to connect, and the bolt is formed by splicing nuts and screws which can be manufactured separately, so that the blank is saved.

The utility model relates to a splicing bolt made of carbon-carbon composite materials, which comprises a nut, a screw rod and a stop piece;

the inner side wall of the nut is provided with a nut reverse thread and a nut semicircular groove;

the outer side wall of the screw is provided with a screw reverse thread and a screw semicircular groove;

the nut reverse threads correspond to the screw reverse threads;

the stop piece is arranged in a round groove formed by aligning the nut semicircular groove and the screw semicircular groove, internal threads are arranged in the nut semicircular groove and the screw semicircular groove, and external threads corresponding to the internal threads are arranged on the stop piece.

Further, one end of the stopper is provided with a long groove in a diameter direction for screwing the stopper.

Further, the nut semicircular groove is arranged on the inner side wall of the nut with the nut reverse threads, extends along the parallel direction of the central axis of the nut, and is communicated with the end face of one end of the nut;

the screw rod semicircular groove is arranged on the outer side wall of the screw rod with screw rod reverse threads, extends along the parallel direction of the central axis of the screw rod, and is communicated with the end face of one end of the screw rod.

Further, the nut reverse threads are equal in length to the screw reverse threads, and the nut semicircular grooves are equal in length to the screw semicircular grooves.

Further, the nut, the screw and one end face of the stopper are in the same plane.

Further, the length of the nut semicircular groove is four fifths of the length of the nut reverse thread; the length of the screw semicircular groove is four fifths of the length of the screw reverse thread.

Further, the nut half groove and the screw half groove are concentric and have the same diameter when aligned.

Further, the outer side wall of the screw far from the screw semicircular groove is also provided with a forward thread.

Further, 2 nut semicircular grooves are symmetrically arranged on the central axis of the nut.

Further, 2 screw semicircular grooves are symmetrically arranged on the central axis of the screw.

The utility model has the beneficial effects that:

according to the utility model, the nut on the screw rod is prevented from loosening by arranging the reverse threads and the stop piece at the joint of the nut and the screw rod, the stop piece is provided with the external threads and is connected in the circular groove formed by the nut semicircular groove and the screw rod semicircular groove through the threads, so that the screw rod and the nut are prevented from rotating relatively along the reverse threads to loosen.

The carbon-carbon composite bolt is formed by splicing the nuts and the screw rods, is simple in bolt assembly and stable in structure, can be used for selecting blanks with the same size to be respectively processed and spliced, saves one third of the blank consumption, and reduces the production cost;

the bolt manufacturing process is more definite in division of work, and lathe and milling machine staff can process nuts and screws in batches during mechanical processing, so that the production efficiency is improved, efficient manufacturing is performed, and batch continuous production is realized.

Drawings

FIG. 1 is a top view of a bolt without a stop member installed in one embodiment of the utility model;

FIG. 2 is a cross-sectional view A-A of FIG. 2;

FIG. 3 is a schematic view of a bolt according to an embodiment of the present utility model;

FIG. 4 is a top view of an stop member according to one embodiment of the utility model;

fig. 5 is a cross-sectional view of fig. 4 at B-B.

In the figure, 1, a nut; 2. a nut reverse thread; 3. a nut semicircular groove; 4. a screw; 5. forward threads; 6. the screw is reversely threaded; 7. a screw semicircular groove; 8. a stopper; 9. an elongated slot.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the device can be mechanically connected, electrically connected, physically connected or wirelessly connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

As shown in the attached drawings 1-5, the utility model comprises a carbon-carbon composite material spliced bolt, which comprises a nut 1, a screw 4 and a stop piece 8, wherein the bolt is formed by splicing the nut 1, the screw 4 and the stop piece 8, the bolt is simple to assemble and stable in structure, when the bolt is manufactured, blanks with the corresponding size can be selected to be respectively processed and manufactured into the nut 1, the screw 4 and the stop piece 8, one third of the blank consumption is saved, the production cost is reduced, the division of work in the bolt manufacturing process is more definite, lathe and milling machine staff can process the nut and the screw in batches during mechanical processing, the production efficiency is improved, the efficient manufacturing is carried out, and the batch continuous production is realized;

the inner side wall of the nut 1 is provided with a nut reverse thread 2 and a nut semicircular groove 3, the outer side wall of the screw 4 is provided with a screw reverse thread 6 and a screw semicircular groove 7, the nut reverse thread 2 corresponds to the screw reverse thread 6, and the nut 1 and the screw 4 are spliced through the matching of the nut reverse thread 2 and the screw reverse thread 6, so that the connection stability between the nut 1 and the screw 4 is ensured when the bolt is used;

in the spliced nut 1 and screw 4, the joint of the inner side wall of the nut 1 and the outer side wall of the screw 4 is aligned with the nut semicircular groove 3 and the screw semicircular groove 7 to form a circular groove, the cross section of the circular groove in the radial direction of the bolt is circular, and the circular groove is used for installing a stop piece 8, so that the nut 1 and the screw 4 are prevented from relatively rotating along the thread direction to loosen when the bolt is used, and the working stability is improved;

the nut semicircular groove 3 and the screw semicircular groove 7 are respectively provided with an internal thread, the internal threads are aligned to form complete internal threads when the two semicircular grooves are aligned, the working part of the stop piece 8 is a cylinder, the outer wall of the stop piece is provided with external threads corresponding to the internal threads, the external threads are connected in the circular grooves formed by aligning the nut semicircular groove 3 and the screw semicircular groove 7 through the matching of the external threads and the internal threads, compared with a traditional clearance fit pin, the stop piece 8 is arranged at the joint of the nut 1 and the screw 4 through threaded connection, the stop piece 8 can be prevented from being shifted out of the circular groove along the central axis direction of the circular groove due to stress or vibration and the like in the use process, the locking function of the connection of the nut 1 and the screw 4 is lost, and the threaded connection of the stop piece 8 can further strengthen the structural stability of the splicing bolt; preferably, the stop 8 is an externally threaded pin.

In a preferred embodiment, as shown in fig. 4 and 5, an elongated slot 9 is provided on the end surface of one end of the stopper 8 in the diameter direction for screwing the stopper 8, and preferably the elongated slot 9 is a rectangular slot, and a conventional installation tool is used.

It should be noted that, the groove shape on the end surface of the stop member 8 may be a conventional groove shape such as a cross shape or a quincuncial shape.

In a preferred embodiment, as shown in fig. 2, a nut semicircular groove 3 is provided at a portion having a nut reverse thread 2 on an inner side wall of the nut 1 and extends in a parallel direction along a central axis of the nut 1, a screw semicircular groove 7 is provided at a portion having a screw reverse thread 6 on an outer side wall of the screw 1 and extends in a parallel reverse direction along a central axis of the screw 4, and when a stopper 8 is installed in the circular groove, the ability of the nut reverse thread 2 and the screw reverse thread 6 to relatively rotate is deteriorated; the nut semicircular groove 3 is communicated with the end face of the upper end of the nut 1, the screw semicircular groove 7 is communicated with the end face of the upper end of the screw 4, and a circular notch is formed in the upper end of the bolt in the aligned circular groove, so that the stop piece 8 can be installed into the circular groove from the upper end, and the assembly is convenient.

It should be noted that, in the embodiment of the present utility model, the "upper end" is an end near the connection between the nut 1 and the screw 4, and the "lower end" is an end far from the connection between the nut 1 and the screw 4.

In a preferred embodiment, as shown in fig. 2, the nut reverse thread 2 is of equal length to the screw reverse thread 6, and the nut half groove 3 is of equal length to the screw half groove 7, so that the nut 1 and the screw 4 are mounted in alignment.

The term "length" in the embodiment of the present utility model refers to an extension distance along the central axis of the nut 1 or the central axis of the screw 4.

In a preferred embodiment, after the splicing of the bolts is completed, the upper end faces of the nuts 1, the bolts 4 and the stop pieces 8 are aligned in the same plane, so that the upper end surfaces of the assembled bolts are flat, and the installation and the use of the bolts are facilitated.

In a preferred embodiment, as shown in fig. 2, the length of the nut semicircular groove 3 is four fifths of the length of the nut reverse thread 2, and correspondingly, the length of the screw semicircular groove 7 is four fifths of the length of the screw reverse thread 6, so that the length of the stop member 8 can be installed, thereby ensuring the anti-loosening effect, and meanwhile, the lower end of the nut semicircular groove 3 does not penetrate through the nut 1, so that the stop member 8 can be limited, and the strength of the nut 1 is ensured.

In a preferred embodiment, as shown in fig. 1 and 2, the nut half groove 3 and the screw half groove 7 are aligned with the same center and the same diameter, facilitating the installation of the stop member 8.

In a preferred embodiment, as shown in fig. 2, the outer side wall of the screw 4 near the lower end is provided with a forward thread 5 as the thread of the splice bolt.

In a preferred embodiment, as shown in fig. 2, 2 nut semicircular grooves 3 are formed in the nut 1, preferably, the 2 nut semicircular grooves 3 are symmetrical about the central axis of the nut 1, preferably, 2 screw semicircular grooves 7 are formed in the screw 4 and symmetrical about the central axis of the screw 4, when the nut 1 and the screw 4 are spliced, each nut semicircular groove 3 and one screw semicircular groove 7 are aligned to form a circular groove, so that the number of stop pieces 8 at the joint is increased, and the splice of the nut 1 and the screw 4 is further prevented from loosening.

In a preferred embodiment, 4 nut semicircular grooves 3 are formed in the nut 1, preferably, the 4 nut semicircular grooves 3 are symmetrical about the central axis of the nut 1, preferably, 4 screw semicircular grooves 7 are formed in the screw 4 about the central axis of the screw 4, when the nut 1 and the screw 4 are spliced, each nut semicircular groove 3 and one screw semicircular groove 7 are aligned to form a circular groove, the number of stop pieces 8 mounted at the connecting position is increased, and the splice of the nut 1 and the screw 4 is further prevented from loosening.

In the embodiment of the utility model, the splicing process of the splicing bolt made of the carbon-carbon composite material comprises the following steps: the processed 1 nut 1 and 1 screw 4 are matched and connected through the nut reverse threads 2 and the screw reverse threads 6, the upper end faces of the nut 1 and the screw 4 are flush, the stop piece 8 is installed in a circular groove formed by aligning the nut semicircular groove 3 with the screw semicircular groove 7 through threaded connection, the upper end face of the stop piece 8 is flush with the upper end faces of the nut 1 and the screw 4, and the bolt splicing is completed. The bolt splicing operation is simple, a large amount of blank consumption can be saved, the stop piece 8 and the reverse threads can prevent the nut 1 and the screw 4 from falling off in the use process, the stop piece 8 is connected through the threads to avoid the play, and the whole structure of the bolt is firm.

What is not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. The splicing bolt of the carbon-carbon composite material is characterized by comprising a nut (1), a screw (4) and a stop piece (8);

the inner side wall of the nut (1) is provided with a nut reverse thread (2) and a nut semicircular groove (3);

the outer side wall of the screw (4) is provided with a screw reverse thread (6) and a screw semicircular groove (7);

the nut reverse thread (2) corresponds to the screw reverse thread (6);

the stop piece (8) is arranged in a round groove formed by aligning the nut semicircular groove (3) with the screw semicircular groove (7), internal threads are arranged in the nut semicircular groove (3) and the screw semicircular groove (7), and the stop piece (8) is provided with external threads corresponding to the internal threads.

2. The carbon-carbon composite splicing bolt according to claim 1, wherein one end of the stopper (8) is provided with a long groove (9) in a diameter direction for screwing the stopper (8).

3. The carbon-carbon composite splicing bolt according to claim 1, wherein the nut semicircular groove (3) is arranged on the inner side wall of the nut (1) with the nut reverse thread (2) and extends in the direction parallel to the central axis of the nut (1), and the nut semicircular groove (3) is communicated with the end face of one end of the nut (1);

the screw semicircular groove (7) is formed in the outer side wall of the screw (4) with the screw reverse threads (6), extends along the central axis parallel direction of the screw (4), and is communicated with the end face of one end of the screw (4).

4. The carbon-carbon composite material splicing bolt according to claim 1, wherein the nut reverse thread (2) and the screw reverse thread (6) are equal in length, and the nut semicircular groove (3) and the screw semicircular groove (7) are equal in length.

5. The carbon-carbon composite splicing bolt according to claim 4, wherein the nut (1), the screw (4) and one end face of the stopper (8) are in the same plane.

6. The carbon-carbon composite splicing bolt according to claim 5, wherein the length of the nut half groove (3) is four fifths of the nut reverse thread (2); the length of the screw semicircular groove (7) is four fifths of the screw reverse thread (6).

7. The carbon-carbon composite splicing bolt according to claim 1, wherein the nut half groove (3) and the screw half groove (7) are concentric and have the same diameter when aligned.

8. The carbon-carbon composite splicing bolt according to any one of claims 1 to 7, wherein the outer side wall of the screw (4) away from the screw semicircular groove (7) is further provided with a forward thread (5).

9. The carbon-carbon composite splicing bolt according to any one of claims 1 to 7, wherein 2 nut semicircular grooves (3) are symmetrically arranged with respect to a central axis of the nut (1).

10. The carbon-carbon composite splicing bolt according to claim 9, wherein 2 screw semicircular grooves (7) are symmetrically arranged on the central axis of the screw (4).