CN217873680U

CN217873680U - Combined screw

Info

Publication number: CN217873680U
Application number: CN202222295738.8U
Authority: CN
Inventors: 郭书琴; 杨继
Original assignee: Dongguan Jinri Hardware Products Co ltd
Current assignee: Dongguan Jinri Hardware Products Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-22
Anticipated expiration: 2032-08-31

Abstract

The utility model relates to a connecting fastener especially relates to a combination screw. A combination screw, comprising: the replaceable multi-head screw rod is characterized by comprising a plurality of replaceable heads with different lengths, wherein each head is connected with the screw rod in an inserting and matching mode, a limiting strip is fixed on the side face of a fixing column at the lower end of each head, a first jack and a limiting groove are formed in the end face of each screw rod, the fixing column is matched with the first jack, and the limiting strips are in sliding fit with the limiting grooves. When the combined screw needs to be lengthened, the head and the screw rod are separated, a head with a longer size is matched with the screw rod, and the diameter of the head lengthening part is the same as that of the screw rod. When the combined screw needs to be subjected to crack detection, the combined screw does not need to be detached from equipment, only the head is pulled out, the crack detection is longitudinally carried out on the inner part of the screw rod from the position of the first jack, and the head is inserted after the detection is finished; not only is the operation simple, but also no influence is caused to other screws.

Description

Combined screw

Technical Field

The utility model relates to a connecting fastener especially relates to a combination screw.

Background

When two devices having a large thickness are connected, a long screw is sometimes lacked to connect the two devices. In addition, thereby when the long-term vibrations that produce because equipment long-term operation of screw fixation equipment time can cause the screw to extrude and make the inside crackle that appears of screw to need carry out crack detection to the screw. Traditional detection need lift the screw off again and detect it, and not only the operation is complicated, and the screw of a department is lifted off and can appear between two equipment unstably not hard up moreover to extrude other screws that do not unload, cause irreversible damage to other screws.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the background art, the utility model provides a combination screw.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a combination screw, comprising: the replaceable multi-head screw rod is characterized by comprising a plurality of replaceable heads with different lengths, wherein each head is connected with the screw rod in an inserting and matching mode, a limiting strip is fixed on the side face of a fixing column at the lower end of each head, a first jack and a limiting groove are formed in the end face of each screw rod, the fixing column is matched with the first jack, and the limiting strips are in sliding fit with the limiting grooves.

Furthermore, a clamping head is arranged at the lower end of the head, and a clamping groove matched with the clamping head is fixed at the bottom of the first insertion hole.

Furthermore, a second jack is arranged on the end face of the head lower end fixing column, and the clamping head is located in the second jack.

Furthermore, the clamping head is spherical, and the clamping groove is formed by a plurality of arc-shaped elastic sheets.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. when the combined screw needs to be lengthened, the head part and the screw rod are separated, a head part with a longer size is matched with the screw rod, and the diameter of the head lengthening part is the same as that of the screw rod.

2. When the combined screw needs to be subjected to crack detection, the combined screw does not need to be detached from equipment, only the head is pulled out, the crack detection is longitudinally carried out on the inner part of the screw rod from the position of the first jack, and the head is inserted after the detection is finished; not only is the operation simple, but also no influence is caused to other screws.

Drawings

FIG. 1 is a schematic view of the overall structure of the combination screw of the present invention;

FIG. 2 is an exploded view of the structure of the combination screw of the present invention;

FIG. 3 is a schematic cross-sectional view of the combination screw of the present invention;

FIG. 4 is a schematic view of the assembled screw after replacing the head according to the present invention;

fig. 5 is an explosion diagram of the combined screw structure after the head of the present invention is replaced.

In the figure: 1. a head; 2. a screw; 3. a limiting strip; 4. a limiting groove; 5. a first jack; 6. a second jack; 7. clamping a head; 8. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the technical solution adopted by the present invention is as follows:

a combination screw comprises a plurality of heads 1. A plurality of said heads 1 have different lengths.

The head 1 and the screw rod 2 constitute a combined screw. The head part 1 and the screw rod 2 are in a plug-in type matching relationship. The head part 1 and the screw rod 2 are connected in a matching way. The lower end face of the head part 1 is provided with a second jack 6, and the upper end of the screw rod 2 is provided with a first jack 5. The diameter of the fixing column at the lower end of the head 1 is the same as that of the first insertion hole 5, so that the head 1 can be inserted into the first insertion hole 5 of the screw 2.

A clamping head 7 is fixed at the top part in the second jack 6, and a clamping groove 8 is fixed at the bottom part of the first jack 5. The clamping head 7 is in a spherical shape, and the clamping groove 8 is formed by a plurality of arc-shaped elastic sheets. When the head 1 is inserted into the screw rod 2, the clamping head 7 is buckled with the clamping groove 8, so that the head 1 is buckled with the screw rod 2. When the head 1 is pulled out of the screw 2, the head 1 and the screw 2 can be separated from each other. When the combined screw needs to be lengthened, the currently shorter head 1 and the screw rod 2 are separated, a head 1 with a longer size is matched with the screw rod 2, and the diameter of the lengthened part of the head 1 with the longer size is the same as that of the screw rod 2. When the combined screw needs to be shortened, only the currently longer head 1 and the screw rod 2 need to be separated, and the head 1 with the shorter size is matched with the screw rod 2.

The upper side surfaces of the fixing columns at the lower ends of all the heads 1 are all fixed with limiting strips 3, and the side surfaces of the first jacks 5 are provided with limiting grooves 4. The limiting strip 3 is in sliding fit with the limiting groove 4. When the combination screw is screwed, the head 1 and the screw rod 2 are allowed to rotate synchronously. When the combined screw needs to be subjected to thread detection, the head part 1 is pulled out, and the screw rod 2 is longitudinally subjected to crack detection from the position of the first insertion hole 5.

In the working process, the fixing column at the lower end of the head part 1 is aligned to the first jack 5 on the screw rod 2, the limiting strip 3 is aligned to the limiting groove 4, the head part 1 is pressed downwards to enable the fixing column to enter the first jack 5, and when clicking is heard, the matching of the head part 1 and the screw rod 2 is completed at the moment.

When the combined screw needs to be lengthened, the currently shorter head 1 and the screw rod 2 are separated, and the head 1 with the longer size is matched with the screw rod 2.

When the combined screw needs to be subjected to crack detection, the combined screw does not need to be detached from equipment, only the head 1 is pulled out, the crack detection is longitudinally carried out on the inner part of the screw rod 2 from the position of the first insertion hole 5, and the head 1 is inserted after the detection is finished; not only is the operation simple, but also no influence is caused to other screws.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A combination screw, comprising: the replaceable multiple heads (1) with different lengths are connected with the screw rods (2) in a splicing fit mode, the side faces of fixing columns at the lower ends of the heads (1) are fixed with limiting strips (3), first insertion holes (5) and limiting grooves (4) are formed in the end faces of the screw rods (2), the fixing columns are matched with the first insertion holes (5), and the limiting strips (3) are in sliding fit with the limiting grooves (4).

2. The combination screw of claim 1, wherein: the lower extreme of head (1) is equipped with dop (7), the bottom of first jack (5) is fixed with draw-in groove (8) with dop (7) matched with.

3. The combination screw of claim 2, wherein: and a second jack (6) is arranged on the end face of the lower end fixing column of the head (1), and the chuck (7) is positioned in the second jack (6).

4. The combination screw of claim 2, wherein: the clamping head (7) is spherical, and the clamping groove (8) is formed by a plurality of arc-shaped elastic sheets.