CN204646927U - Storage bits space communication type chipless self tapping swivel nut - Google Patents

Abstract

The utility model discloses a chip-storing space connected type chipless self-tapping screw sleeve, which is mainly composed of a cylindrical main body, a through hole is opened on the main body along its axis, and a through hole is respectively arranged on the inside and outside of the through hole of the main body. Thread, the front end of the main body is provided with a guide post, an annular chip storage groove is opened between the guide post and the main body, and a ring-shaped chip storage groove is provided at the outer front end thread of the main body to connect with the annular chip storage groove. The advantages of this utility model are: the structural design is very reasonable, the working efficiency of installation is effectively improved, the safety performance of its use is improved, the strength of the main body of the screw sleeve is greatly reduced, and its own strength is effectively guaranteed. .

Description

Chip storage space connected chipless self-tapping screw sleeve

technical field

The utility model relates to the technical field of fasteners, more specifically to the technical field of screw sleeves.

Background technique

The screw insert is mainly used to strengthen the parts when other parts need to be fixed on the parts with soft materials. It is widely used in aviation, aerospace and high-speed trains. At present, it is especially widely used in high-speed trains. Because of the design, in order to reduce the weight of the train itself, the shell of the locomotive is usually made of aluminum. However, due to the softness of the aluminum material itself, if it is necessary to fasten other parts on it, its fastening strength will be difficult to guarantee. The current solution is to drill holes on the aluminum material first, and then embed the screw sleeve in the pre-drilled hole through its external thread, and effectively fasten it with other parts through the internal thread of the screw sleeve embedded in it. Connection still has the following deficiencies in the current use process. One is that the existing screw sleeve is easy to loosen without a locking device after being screwed into the hole and then withdraws, causing a safety hazard; the other is that the existing screw sleeve is screwed into the hole There will be metal wire chips in the hole. After the metal wire chips fall out from the internal thread through hole of the screw sleeve, they must be cleaned separately. If the generated metal wire chips cannot fall from the internal thread through hole It will also bring a lot of inconvenience to the follow-up work, and even affect the normal installation of the follow-up parts. The applicant invented and created the chip storage type self-tapping self-locking double-threaded sleeve through revolutionary improvement of the existing products. The patent application number is: 201410041644.5. Although the chip storage slots are evenly distributed around the outer circle of the main body, the metal wire chips generated during self-tapping are not evenly distributed in each chip storage slot. The performance is not good, and the screw sleeve is prone to inclination; the second is that the processing of the chip storage groove is difficult, and the processing is not very convenient; the third is that the outer peripheral area of the main body occupied by the chip storage groove is relatively large, which greatly weakens the screw The strength of the set itself.

Utility model content

The purpose of this utility model is to provide a very reasonable structural design in order to solve the above-mentioned deficiencies, which can prevent loosening and has a self-locking function. It can also effectively guarantee the strength of the chip storage space connected chipless self-tapping screw sleeve.

The technical solution that the utility model adopts in order to solve the above technical problems is as follows:

The chip-storage space connected chipless self-tapping screw sleeve is mainly composed of a cylindrical main body, and a through hole is opened on the main body along its axis, and threads are respectively arranged on the inside and outside of the through hole of the main body. The front end of the main body is provided with a guide column, and an annular chip storage groove is opened between the guide column and the main body, and a chip storage groove connected with the annular chip storage groove is opened at the thread of the outer front end of the main body .

The cross section of the chip pocket is circular.

The chip storage grooves are composed of 2 to 5 pieces, which are evenly distributed at the front end outside the main body, and communicate with the ring-shaped chip storage grooves respectively.

The depth of the chip storage groove at the outer front end of the main body is the same as that of the annular chip storage groove.

The beneficial effects that the utility model can achieve by adopting the above-mentioned technical solution are: 1. The structural design is very reasonable. By setting up a chip storage tank at the outer front end of the screw sleeve, the metal wire chips generated during self-tapping will be directly It enters the chip storage tank without leaking out, so that all adverse effects and consequences caused by the falling of metal wire chips will be completely avoided, and the workload of cleaning up the falling metal wire chips will be saved. , which effectively improves the working efficiency of the installation; 2. In order to overcome the problem that the metal wire chips generated during self-tapping cannot be evenly distributed in each chip storage tank, resulting in uneven screwing force, and the main body of the screw sleeve is prone to tilting. The front end of the main body is provided with an annular chip storage groove connected to the chip storage groove, so that the metal wire chips generated during self-tapping will be evenly arranged in the annular chip storage groove, which not only greatly reduces the twisting resistance , and the metal wire chips generated are evenly distributed, which has a good anti-loosening and self-locking function, which improves its safety performance during use; 4. The chip storage groove is a regular circular shape, and the annular chip storage groove is a regular ring shape, which is very convenient for processing; 5. The outside of the screw sleeve body occupied by the chip storage groove The front end area is small, and the weakening of the main body of the screw sleeve is greatly reduced, effectively ensuring its own strength.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of the full section structure of Fig. 1;

Fig. 3 is a schematic diagram of the cross-sectional structure along line A-A of Fig. 1 .

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the chip-storing space connected chipless self-tapping screw sleeve is mainly composed of a cylindrical main body 1, and a through hole 2 is opened on the main body 1 along its axis. The inner and outer sides of the through hole 2 of the main body 1 are respectively provided with threads, the front end of the main body 1 is provided with a guide post 3, and an annular chip storage groove 4 is opened between the guide post 3 and the main body 1. The main body 1 is also provided with a chip storage groove 5 connected to the annular chip storage groove 4 at the front thread of the outer side. The cross section of the chip storage groove 5 is preferably circular, and the chip storage groove 5 consists of 2 to 5 Composition, evenly distributed on the front end of the outer side of the main body 1, and communicated with the annular chip storage groove 4 respectively, in order to facilitate the metal wire chips generated during self-tapping from the chip storage groove 5 to enter the annular chip storage groove 4 smoothly Inside, the depth of the chip storage groove 5 at the outer front end of the main body 1 is the same as that of the annular chip storage groove 4 .

Claims (4)

1. Chipless self-tapping screw sleeve connected to the chip storage space, characterized in that it is mainly composed of a cylindrical main body, and a through hole is opened on the main body along its axis, and the inside and outside of the through hole of the main body are respectively set There are threads, the front end of the main body is provided with a guide post, an annular chip storage groove is opened between the guide post and the main body, and the outer front end thread of the main body is also provided with the annular chip storage groove Connected chip pocket. 2 . The chip-storage-communicating chip-free screw insert according to claim 1 , wherein the cross-section of the chip-storage groove is circular. 3 . 3. The chip-storage space connected chip-free screw insert according to claim 1 or 2, characterized in that: the chip storage grooves are composed of 2 to 5 pieces, which are evenly distributed at the front end outside the main body, and are connected to the ring respectively. The shaped chip storage grooves are connected. 4. The chip-storage-communicating chip-free screw insert according to claim 1 or 2, characterized in that the depth of the chip storage groove at the outer front end of the main body is the same as the depth of the annular chip storage groove.