CN210161047U

CN210161047U - Screw guide sleeve

Info

Publication number: CN210161047U
Application number: CN201920853649.6U
Authority: CN
Inventors: 杨引
Original assignee: Shanghai XPT Technology Ltd
Current assignee: Weiran Nanjing Power Technology Co ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-03-20
Anticipated expiration: 2029-06-06
Also published as: TWM585692U

Abstract

A screw guide sleeve for guiding a screw (2) to a locking hole (3a), the screw guide sleeve comprising: a cylindrical section (12), a flared section (14) and an expanded section (16). The straight section (12) extends in a guiding direction. The flared section (14) is connected to one end of the straight section (12) in the guiding direction. The expanding section extends from the other end of the straight cylinder section (12) along the guiding direction, and the aperture of the expanding section (16) is larger than that of the straight cylinder section (12). The screw (2) enters the screw guide sleeve through the flaring section (14), moves to the expansion section (16) through the straight cylinder section (12), and enters the locking hole (3a) through the expansion section (16).

Description

Screw guide sleeve

Technical Field

The present invention relates to a guide sleeve, and more particularly to a guide sleeve for guiding a screw.

Background

In general, in the application of screws for fixing objects (e.g., fixing automobile parts), a user can directly hold the screws with fingers, position the screws, and screw the screws with a screwdriver, or screw the screws with a hand-held auto-screwdriving machine (e.g., by way of a claw screw gripper, an auto-vacuum chuck, a magnetic screwdriver, etc.). When the operation space is insufficient (for example, the space above the locking hole is narrow due to the complex structure of the automobile part, or the interference of other part structures exists at the fixed position of the automobile part, so that the fingers are difficult to support and position the screw, or the head of the screw locking machine is difficult to extend into), the screw locking is very difficult. In addition, some screwdrivers have magnetic heads, and can only attract and tighten the screw by the screwdriver. However, when the weight of the screw is large, the magnetic attraction force is not sufficient to stably attract the screw, so that it is still not easy to screw-lock the screw in the aforementioned situation where the operation space is insufficient.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the background art, an object of the present invention is to provide a screw guiding sleeve capable of guiding a screw in a narrow operation space so as to facilitate a screwdriver to tighten the screw.

The utility model provides a screw guide sleeve pipe is used for guiding a screw to a locking hole. The screw guide sleeve comprises a straight cylinder section, an expanding section and an expanding section. The straight cylinder section extends along a guiding direction. The flared section is connected to one end of the straight section in the guiding direction. The expansion section extends from the other end of the straight cylinder section along the guiding direction, and the aperture of the expansion section is larger than that of the straight cylinder section. The screw enters the screw guide sleeve through the flaring section, moves to the expanding section through the straight cylinder section and enters the locking hole through the expanding section. Therefore, a screwdriver can extend into the screw guide sleeve from the flaring section to screw the screw into the locking hole.

Preferably, the screw has a head portion and a threaded portion extending from the head portion, the head portion corresponding to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, and the bore diameter of the straight barrel section is smaller than the outside diameter manufacturing average plus five times the outside diameter manufacturing standard deviation. Further, the bore diameter of the straight section is greater than the outer diameter manufacturing mean plus four times the outer diameter manufacturing standard deviation.

Preferably, the screw has a head portion and a threaded portion extending from the head portion, the head portion corresponds to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, and the bore diameter of the straight cylinder section is larger than the outside diameter manufacturing average plus six times the outside diameter manufacturing standard deviation.

Preferably, the screw has a head portion and a threaded portion extending from the head portion, the head portion corresponds to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, and the bore diameter of the straight cylinder section is greater than the outside diameter manufacturing average plus 0.15mm and less than the outside diameter manufacturing average plus 0.20 mm.

Preferably, the screw has a head portion and a threaded portion extending from the head portion, the head portion corresponds to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, and the bore diameter of the expansion section is larger than the outside diameter manufacturing average. Further, the bore diameter of the expanding section is greater than the outer diameter manufacturing average plus twelve times the outer diameter manufacturing standard deviation; alternatively, the bore diameter of the expanded section is greater than the outer diameter manufacturing average plus 0.45 mm.

Preferably, four times the outer diameter is manufactured with a standard deviation of less than 0.15 mm.

Preferably, the screw has a head and a threaded portion extending from the head, the threaded portion corresponding to a length manufacturing average and a length manufacturing standard deviation, and the length of the expanding section in the guiding direction is smaller than the length manufacturing average. Further, the length of the flared section in the guiding direction is less than the length manufacturing average plus four times the length manufacturing standard deviation and minus one-half of the lead of the threaded portion; or, the length of the flared section in the guiding direction is less than the length manufacturing average plus four times the length manufacturing standard deviation and minus the lead of the threaded portion; alternatively, the length of the flared section in the guiding direction is less than the length manufacturing average plus four times the length manufacturing standard deviation minus two times the lead of the threaded portion.

Preferably, the hardness of the inner wall of the straight cylinder section is greater than the surface hardness of the screw.

Preferably, the expansion segment comprises an incomplete wall.

Preferably, the cross section of the straight cylinder section is circular.

Compared with the prior art, the utility model provides a screw guide sleeve pipe simple structure can guide this screw in narrow and small operating space to this screw is screwed to this screwdriver.

The advantages and spirit of the present invention can be further understood by the following embodiments and the accompanying drawings.

Drawings

Fig. 1 is a schematic view of a screw guide sleeve according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the screw guide sleeve of FIG. 1 taken along line X-X;

FIG. 3 is a schematic view of the screw guide sleeve of FIG. 2 guiding a screw;

FIG. 4 is a schematic view of a screw guide sleeve according to another embodiment of the present invention;

FIG. 5 is a cross-sectional view of the screw guide sleeve of FIG. 4 taken along line Y-Y.

Reference numerals:

1-screw guide sleeve; 2-a screw; 3-automotive parts; 4-a support seat; 5-another screw guide sleeve; 12-a straight cylinder section; 14-a flared section; 16-an expansion section; 17-another expansion segment; 22-a head; 24-a threaded portion; 122-one end; 124-the other end; 126-inner wall; 2 a-axial direction; 3 a-locking holes; 3 b-a first object; 3 c-a second object; 3 d-a third object; 4 a-locking holes; 12 a-a first aperture; 16a second aperture; 16 b-a first length; 22 a-a first outer diameter; 24 a-a second outer diameter; 24 b-a second length; d1-guide direction.

Detailed Description

Referring to fig. 1 and 2, the screw guide sleeve 1 according to the present invention is used for guiding a screw 2 (shown in fig. 2), and the screw guide sleeve 1 includes a cylindrical section 12, a flared section 14 and an expanded section 16. The straight tube section 12 extends along a guiding direction D1. The flared section 14, which is connected to an end 122 of the straight tube section 12 in the guiding direction D1, serves as an inlet structure of the screw guiding sleeve 1, and has a substantially trumpet-shaped structure (or a V-shaped opening structure) with a gradually decreasing aperture characteristic, which facilitates guiding the screw 2 into the screw guiding sleeve 1. The diameter of the straight cylinder section 12 is a first diameter 12a, the first diameter 12a is slightly larger than the outer diameter of the head 22 of the screw 2, and the outer diameter of the head 22 is a first outer diameter 22a, so that the screw 2 can smoothly slide in the straight cylinder section 12. The expanding section 16 extends from the other end 124 of the straight cylinder section 12 along the guiding direction D1, and as the exit structure of the screw guiding sleeve 1, the aperture of the expanding section 16 is the second aperture 16a, and the second aperture 16a is larger than the first aperture 12a of the straight cylinder section 12, which can provide a relatively large moving space for the screw 2, so as to facilitate the screwing of the screw 2.

Referring to fig. 3, fig. 3 is a schematic view of the screw guide of fig. 2, wherein the position of the screw when the screw is guided to move is shown by a dotted line. In use, for example, in the case where the screw 2 is used to fix an automobile component 3 (shown in the figure as a single entity simplification) to a supporting seat 4, the automobile component 3 is first placed on the supporting seat 4 (e.g., an automobile structure frame), and the locking hole 3a (e.g., a through hole, the diameter of which is slightly larger than the outer diameter of the threaded portion 24 of the screw 2, and the outer diameter of the threaded portion 24 is the second outer diameter 24a) of the automobile component 3 is aligned with the locking hole 4a (e.g., a threaded hole, which is matched with the threaded portion 24 of the screw 2) of the supporting seat 4. The screw guide sleeve 1 is then placed substantially stationary on the vehicle component 3 (e.g., held by hand) with the flared section 16 aligned with the locking hole 3 a. Then the thread part 24 of the screw 2 faces the screw guide sleeve 1, so that the screw 2 enters the screw guide sleeve 1 through the flaring section 14; the screw 2 moves to the expansion section 16 through the straight cylinder section 12 (under the action of gravity) and then enters the locking hole 3a through the expansion section 16. Then, the user inserts the screw guide sleeve 1 with a screwdriver, screws the screw 2, and removes the screw guide sleeve 1, so as to fix the automobile component 3 on the support seat 4.

In practical applications, the screw guide sleeve 1 is used for guiding the same kind of screw 2, and the size of the screw 2 has manufacturing tolerance in practice, so that the screw guide sleeve 1 is designed to have a narrow structure to adapt to a narrow operation space (for example, the space above the locking hole 3a in the automobile part 3 in fig. 3 is limited by other objects: the structural constraints of the first object 3b and the second object 3c, for example, the electronic components on the automobile part 3), and the screw 2 can still be guided smoothly. The manufacturing tolerances of the dimensions of the screw 2 can be achieved by carrying out a general sampling check, the details of which are not described in detail. Alternatively, screws of the same type may be produced from multiple sets of dies, and the sample check data may be combined and analyzed so that the screw guide sleeve 1 is sized for the final product produced by the multiple sets of dies.

In principle, the actual values of the dimensions of the screw 2 will be normally distributed. For example, the screw 2 has an axial direction 2a (shown by a dotted line in fig. 2), the threaded portion 24 extends from the bottom surface of the head portion 22 in the axial direction 2a, the first outer diameter 22a of the head portion 22 (i.e., the dimension of the head portion 22 perpendicular to the axial direction 2a, such as a circular outer diameter) corresponds to an outer diameter manufacturing average value and an outer diameter manufacturing standard deviation, the length of the threaded portion 24 is the second length 24b (i.e., the distance from the bottom surface of the head portion 22 to the end surface of the threaded portion 24), and the second length 24b corresponds to a length manufacturing average value and a length manufacturing standard deviation. In one embodiment, the first bore diameter 12a of the straight section 12 is less than the outside diameter manufacturing mean plus five times the outside diameter manufacturing standard deviation; further, the first bore diameter 12a of the straight section 12 is greater than the outer diameter manufacturing mean plus four times the outer diameter manufacturing standard deviation. In another embodiment, the first bore diameter 12a of the straight section 12 is greater than the outside diameter manufacturing average plus six times the outside diameter manufacturing standard deviation. In another embodiment, the screw 2 is an M8 screw, and when the four times outer diameter manufacturing standard deviation is less than 0.15mm, the first bore diameter 12a of the straight barrel section 12 is greater than the outer diameter manufacturing average plus 0.15mm and less than the outer diameter manufacturing average plus 0.20 mm.

In one embodiment, the second aperture 16a of the expanding section 16 is larger than the outer diameter manufacturing average; further, the second bore diameter 16a of the expanding section 16 is greater than the outer diameter manufacturing mean plus twelve times the outer diameter manufacturing standard deviation. In another embodiment, the second aperture 16a of the expanding section 16 is greater than the outer diameter manufacturing mean plus twelve times the outer diameter manufacturing standard deviation. In another embodiment, the screw 2 is an M8 screw, and the second bore diameter 16a of the expanding section 16 is greater than the outer diameter manufacturing mean plus 0.45mm when the four times outer diameter manufacturing standard deviation is less than 0.15 mm. Furthermore, if the space above the locking hole 3a allows, the second aperture 16a of the expansion section 16 can be enlarged as much as possible to eliminate or suppress possible structural interference between (the head 22 of) the screw 2 and the screw guide sleeve 1 when screwing the screw 2.

In the above embodiments, the screw guide sleeve 1 can be further limited to be applied to the case where the manufacturing standard deviation of the outer diameter is less than 0.15mm by four times.

In one embodiment, the first length 16b of the expanding section 16 in the guiding direction D1 is smaller than the average length, so that the threaded portion 22 of the screw 2 enters the locking hole 3a before the head 22 of the screw 2 enters the expanding section 16. Further, the length of the diverging section 16 is the first length 16b, and the first length 16b can be designed to be less than the manufacturing average of the lengths plus four times the manufacturing standard deviation of the lengths and minus one-half the lead of the threaded portion, so that the head 22 can enter the diverging section 16 after rotating the screw 2 half a turn in principle. Alternatively, the first length 16b of the diverging section 16 is designed to be less than the manufacturing average of the length plus four times the manufacturing standard deviation of the length and minus the lead of the threaded portion so that the head 22 can enter the diverging section 16 after one rotation of the screw 2. Alternatively, the first length 16b of the dilating segments 16 is designed to be less than the length manufacturing average plus four times the length manufacturing standard deviation minus two times the lead of the threaded portion so that the head 22 may enter the dilating segments 16 after two revolutions of the screw 2.

In addition, in the embodiment shown in fig. 3, the locking hole 3a of the automobile component 3 is a through hole, and the locking hole 4a of the supporting seat 4 is a screw hole, but the actual operation is not limited thereto; for example, the locking

holes

3a, 4a may be both screw holes. In addition, when the diameter of the locking hole 3a (e.g., the through hole) is significantly larger than the second outer diameter 24a of the threaded portion 24, the structural constraint of the locking hole 3a to (the threaded portion 24 of) the screw 2 may be insufficient during the process of screwing the screw 2, and at this time, the aforementioned length design of the expansion section 16 may also take the depth of the locking hole 3a into consideration (i.e., the first length 16b of the expansion section 16 plus the depth of the locking hole 3a is smaller than the average value of the length), so that the threaded portion 22 of the screw 2 enters the locking hole 4a before the head 22 of the screw 2 enters the expansion section 16. The details of the design can be found in the above paragraphs, and are not repeated.

In addition, in practical operation, the hardness of the inner wall 126 of the straight cylindrical section 12 of the screw guide sleeve 1 is greater than the surface hardness of the screw 2, which contributes to prolonging the service life of the screw guide sleeve 1; this can be achieved by making the screw guide sleeve 1 of a suitable material or by applying a suitable surface treatment to the inner wall 126 of the cylindrical section 12, which will not be described in detail. In addition, the sections of the screw guide sleeve 1 (perpendicular to the extending direction D1) are all circular in cross section, but the actual operation is not limited thereto, and the sections of the sections thereof only need to be enough to allow the screw 2 to pass through; for example, the head 22 of the screw 2 has a hexagonal column shape, and the cross section of the straight cylinder section 12 can have a hexagonal shape or a circular shape larger than the hexagonal column shape. In addition, in practice, in order to reduce the interference between the screw guide sleeve 1 and other objects in the implementation environment (such as the structure of the automobile part 3 itself, or other parts or automobile components adjacent to the automobile part 3), the expanding section 16 may adopt a crevasse structure design. As shown in fig. 4, the other screw guiding sleeve 5 has a similar structure to the screw guiding sleeve 1, so the reference numerals of the screw guiding sleeve 1 are used in principle, and for other descriptions of the other screw guiding sleeve 5, reference may be directly made to the related descriptions of the screw guiding sleeve 1 and its variations, which are not described again. In contrast to the expansion section 16 of the screw guide sleeve 1, which is in the form of a straight cylinder and comprises a complete circumferential wall, the further expansion section 17 of the screw guide sleeve 2 shown in fig. 4 comprises a partial circumferential wall and is C-shaped in cross section. As shown in fig. 5, the gap of the further expansion section 17 can avoid other objects in the environment of the screw guide sleeve 2: the third object 3d (schematically drawn in fig. 5 in dashed lines) generates structural interference; wherein the outline of (the head 22 of) the screw 2 is drawn in dashed lines in fig. 5, the other screw guide sleeve 5 is still effective in guiding the screw 2 and providing space for screwing the screw 2.

As before explain, the utility model provides a screw guide sleeve pipe can the wide application in the conventional screw assembly of electron or automobile parts trade, especially carries out the screw twistlock in the narrow and small space that the clearance is less than 0.8mm, and can furthest dodge peripheral interference device or structure, can guarantee timely manhole simultaneously, furthest avoids the screw guide sleeve pipe to the negative effects of screw twistlock. In the standard solutions commonly used in the existing industry, the vacuum nail suction tube (the tube wall thickness of which is greater than 0.8mm) and the opening-closing type clamping jaw (the thickness of which is greater than 1mm) cannot be applied to the application occasions smaller than 0.8mm, and are difficult to be applied to the narrow space with the gap smaller than 0.8 mm. Additionally, the utility model provides a screw guide sleeve's straight section of thick bamboo aperture can be designed to be greater than the external diameter and make the average value and add six times's external diameter and make standard deviation to furthest guarantees that the screw once only gets into the locking hole (can be through-hole or screw). The expansion section of the screw guide sleeve can effectively avoid the interference of the head of the screw and the screw guide sleeve structure, and avoid the situations of screw deflection or tooth slipping, tooth decay and the like caused by inclined screwing. The utility model provides a screw guide sleeve pipe can generally be applicable to the screw twistlock and use, and through adjusting different pressure values (atmospheric pressure), the screw guide sleeve pipe can produce the effect of pre-compaction before the screw is screwed, saves the loaded down with trivial details process of pre-compaction lock, screwing once more, also can effectively avoid the twistlock inefficacy that the stress concentration that no pre-compaction produced caused. The screw guide sleeve has no specific requirement on the shape of the head of the screw, and can be implemented in symmetrical shapes such as circles, polygons and the like.

Claims

1. Screw guide sleeve for guiding a screw (2) to a locking hole (3a), the screw guide sleeve comprising:

a cylindrical section (12) extending in a guiding direction;

a flared section (14) connected to one end of the straight section (12) in the guiding direction; and

an expanding section (16) extending from the other end of the straight section (12) along the guiding direction, the aperture of the expanding section (16) being larger than that of the straight section (12);

the screw (2) enters the screw guide sleeve through the flaring section (14), moves to the expansion section (16) through the straight cylinder section (12), and enters the locking hole (3a) through the expansion section (16).

2. The screw guide sleeve according to claim 1, wherein the screw (2) has a head (22) and a threaded portion (24) extending from the head (22), the head (22) corresponding to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, the bore diameter of the straight barrel section (12) being less than the outside diameter manufacturing average plus five times the outside diameter manufacturing standard deviation.

3. The screw guide sleeve according to claim 2, wherein the bore diameter of the straight barrel section (12) is greater than the outer diameter manufacturing mean plus four times the outer diameter manufacturing standard deviation.

4. The screw guide sleeve according to claim 1, wherein the screw (2) has a head (22) and a threaded portion (24) extending from the head (22), the head (22) corresponding to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, the bore diameter of the straight barrel section (12) being greater than the outside diameter manufacturing average plus six times the outside diameter manufacturing standard deviation.

5. The screw guide sleeve according to claim 1, wherein the screw (2) has a head (22) and a threaded portion (24) extending from the head (22), the head (22) corresponding to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, the bore diameter of the straight barrel section (12) being greater than the outside diameter manufacturing average plus 0.15mm and less than the outside diameter manufacturing average plus 0.20 mm.

6. The screw guide sleeve according to claim 1, wherein the screw (2) has a head (22) and a threaded portion (24) extending from the head (22), the head (22) corresponding to an outside diameter manufacturing average and an outside diameter manufacturing standard deviation, the bore diameter of the expanding section (16) being greater than the outside diameter manufacturing average.

7. The screw guide sleeve according to claim 6, wherein the bore diameter of the expansion section (16) is greater than the manufactured mean of the outer diameters plus twelve times the manufactured standard deviation of the outer diameters.

8. The screw guide sleeve according to claim 6, wherein the bore diameter of the expansion section (16) is greater than the manufactured average of the outer diameters plus 0.45 mm.

9. The screw guide sleeve according to any one of claims 2 to 8, wherein the four times outer diameter manufacturing standard deviation is less than 0.15 mm.

10. The screw guide sleeve according to claim 1, wherein the screw (2) has a head (22) and a threaded portion (24) extending from the head (22), the threaded portion (24) corresponding to a length manufacturing average and a length manufacturing standard deviation, the length of the flared section (16) in the guiding direction being less than the length manufacturing average.

11. The screw guide sleeve according to claim 10, wherein the length of the flared section (16) in the guiding direction is less than the length manufacturing average plus four times the length manufacturing standard deviation minus one-half of the lead of the threaded portion (24).

12. The screw guide sleeve according to claim 10, wherein the length of the flared section (16) in the guiding direction is less than the length manufacturing average plus four times the length manufacturing standard deviation minus the lead of the threaded portion (24).

13. The screw guide sleeve according to claim 10, wherein the length of the flared section (16) in the guiding direction is less than the length manufacturing average plus four times the length manufacturing standard deviation minus two times the lead of the threaded portion (24).

14. The screw guide sleeve according to claim 1, wherein the hardness of the inner wall of the straight cylindrical section (12) is greater than the hardness of the surface of the screw (2).

15. The screw guide sleeve according to claim 1, wherein the expansion section (16) comprises an incomplete peripheral wall.

16. The screw guide sleeve according to claim 1, wherein the cross-section of the straight cylindrical section (12) is circular.