TWI668081B - Non-slip sleeve - Google Patents

Abstract

A non-slip sleeve includes: a plurality of engaging portions provided at equal intervals on the inner wall of a sleeve protruding toward the center of the sleeve, and a plurality of grooves between two adjacent engaging portions; The engaging portion has a contour facing the center of the sleeve, and the contour surface includes two intersecting inclined surfaces and an apex angle formed by the intersecting inclined surfaces; the engaging portion has two side grooves respectively facing the adjacent grooves , The end angle where the inclined plane intersects the side surface is an obtuse angle. The anti-skid sleeve of the present invention is suitable for general screw fasteners, worn screw fasteners or severely worn screw fasteners. The screw fastener is a nut and a bolt head.

Description

Non-slip sleeve

The invention relates to a non-slip sleeve capable of operating a severely worn screw (nut or bolt head).

The thirteenth picture is a conventional hexagonal sleeve structure. The sleeve has a sleeve hole at the center of which can fit a screw nut such as a nut or a bolt head. The sleeve hole has six planes to facilitate the combination or separation of the sleeve hole and the screw fastener. , The width of the sleeve hole is slightly larger than the width of the screw member, so that when the sleeve drives the screw member to twist, the rotation angle of the sleeve hole and the screw member produces a difference, the sleeve hole only interferes with the top angle of the screw member by a part of the plane, and the top angle is deformed by improper force , It becomes a worn screw (commonly known as a slip nut or slip bolt head). In order to turn the worn screw, as shown in the fourteenth figure, the sleeve hole is designed as six arc surfaces. The arc surface makes point contact with the worn screw and can drive the worn screw. However, because the circumference of the arc surface of the sleeve hole is tangent to the circumference of the screw member, when the screw fixing wear is severe, the arc surface and the severely worn screw member cannot form a tangent contact point. To solve this problem, as shown in the fifteenth figure, a rectangular engaging portion is formed on each of the polygonal inner walls of the sleeve hole. The rectangular engaging portion has a flat surface and two 90-degree end angles. The flat surface of the engaging portion can be connected to the worn screw. The firmware forms face-to-face contact patterns. But the disadvantage is that in the case of high torque operation and severe wear of the screw fastener, the 90-degree end angle of the rectangular engaging portion is in conflict with the screw fastener, resulting in improper force deformation of the end angle of the rectangular engaging portion until it is worn or broken.

The purpose of the present invention is to propose an improved non-slip sleeve suitable for general screw fasteners (Nuts and bolt heads), worn or severely worn screws.

Technical solution of the present invention: An anti-slip sleeve, comprising: a plurality of engaging portions provided at equal intervals on the inner wall of a sleeve protruding toward the center of the sleeve, and a plurality of intervening two adjacent engaging portions The groove of the engaging portion has a contour facing the center of the sleeve, the contour surface includes two intersecting inclined surfaces and an apex angle formed by the intersection of the inclined surfaces; the engaging portion has two side surfaces respectively facing the adjacent sides In the two grooves, the end angle where the inclined surface intersects the side surface is an obtuse angle; the width of the two inclined surfaces is equal; the inclination angle of the inclined surface is 2°~9°; the center angle formed by the two side surfaces is 30°~60°.

The anti-skid sleeve of the present invention is suitable for general screw fasteners, worn screw fasteners or severely worn screw fasteners. The screw fastener is a nut and a bolt head.

The different inclination angles of the inclined surfaces of the sleeve cause the engaging portion to have different contact relationships with the screw member, including surface contact and line contact. The surface contact ensures the stable operation of the sleeve and the rotation of the screw fastener, and relatively does not damage the peripheral surface of the screw fastener, which is suitable for general fasteners and worn screw fasteners. The line contact creates a bite relationship between the engaging portion and the screw fastener, provides a stronger contact urging force, and is more suitable for operating a screw screw with severe wear.

Structural features such as the inclination angle of the inclined surface of the engaging portion and the center angle of the two sides of the engaging portion can prevent the corner of the engaging portion from damaging the screw, and can also increase the structural strength of the engaging portion to avoid or reduce the engaging portion Collapse damage occurred.

The technical feature of the present invention differs from the prior art in FIG. 15 in that the engaging portion in the prior art in FIG. 15 is rectangular, and the rectangular engaging portion has a flat surface and two side surfaces. The engaging portion of the present invention includes two inclined surfaces that intersect and an apex angle formed by the intersection of the two inclined surfaces. The inclined angle of the inclined surface of the present invention is 2° to 9°. Figure 15: Rectangular engagement part The two side surfaces intersect with the plane at a right angle of 90 degrees. The center angle formed by the two side surfaces of the engaging portion of the present invention is 30°~60°. The end angle of the present invention where the inclined surface intersects the side surface is greater than 90 degrees Obtuse angle.

The fifteenth figure of the prior art rectangular engaging portion forms a face-to-face contact relationship with a flat surface and a screw, and there is only this kind of contact relationship. In the present invention, due to the different inclination angle of the inclined surface, the engaging portion and the screw member can have different contact relationships, including surface contact and line contact.

The rectangular engaging portion of the prior art shown in Figure 15 is only suitable for general or lightly worn screws. The invention is applicable to general screw fasteners, worn screw fasteners, and severely worn screw fasteners.

Figure 15 The two sides of the rectangular engaging portion of the prior art intersect the plane at a 90-degree right angle, but the 90-degree right angle is the structure is fragile, and it will form a 90-degree angle in the case of high torque operation and severe wear of the screw fastener. The phenomenon that the right angle conflicts with the screw fastener causes the 90-degree right angle of the rectangular engaging portion to deform and wear out or break due to improper force. The engaging portion of the present invention has structural features such as the inclination angle of the inclined plane and the center angle of the two sides of the engaging portion, so that the engaging portion does not have an angle of 90 degrees or less, but is an obtuse angle greater than 90 degrees, so the present invention The structural strength of the engaging portion is better than the structural strength of the rectangular engaging portion of the prior art shown in Figure 15. The probability of corner wear or breakage is reduced.

10‧‧‧Sleeve

20‧‧‧Joint Department

21‧‧‧Contour

22‧‧‧Bevel

24‧‧‧Top corner

26‧‧‧Side

28‧‧‧End angle

29‧‧‧groove

31‧‧‧Normal screw firmware

311‧‧‧corner

312‧‧‧Noodles

32‧‧‧Wearing screw firmware

322‧‧‧Noodles

33‧‧‧Severely worn screw firmware

332‧‧‧ noodles

A‧‧‧A point on the circumference of the sleeve

B‧‧‧ a point on the circumference of the sleeve

L‧‧‧Vertical bisector of string

S‧‧‧string

O‧‧‧Sleeve center

P‧‧‧Center angle

θ ‧‧‧ Inclination angle of slope

The first figure is a perspective view of the anti-skid sleeve of the present invention.

The second figure is a plan view of the anti-skid sleeve of the present invention.

The third figure is an enlarged view of the engaging portion of the non-slip sleeve of the present invention.

The fourth figure is a schematic plan view of the non-slip sleeve of the present invention fitted with a general screw fastener.

The fifth picture is an enlarged view of the circle in the fourth picture.

The sixth figure is a schematic plan view of the non-slip sleeve of the present invention pulling a general screw.

The seventh picture is an enlarged view of the circle in the sixth picture.

The eighth figure is a schematic plan view of the anti-skid sleeve of the present invention sleeved and turned to wear the screw.

The ninth picture is an enlarged view of the circle in the eighth picture.

Figure 10 is a schematic plan view of the present invention where the anti-slip sleeve is sleeved and turned to severely wear the screw fastener.

Figure 11 is an enlarged view of the circle of Figure 10 of the present invention.

Figure 12 is an enlarged view of another embodiment of the engaging portion of the non-slip sleeve of the present invention.

Figure 13 is a schematic plan view of a conventional screw fitting for a conventional sleeve fitting operation.

Figure 14 is a schematic plan view of another conventional sleeve-fitting operation wear screw.

Figure 15 is a schematic plan view of yet another conventional sleeve-fitting operation wear screw.

In order to facilitate the description of the central idea of the present invention in the column of the above summary of the invention, it is expressed in a specific embodiment. The embodiments are depicted in proportions and sizes suitable for description, rather than in actual sizes, and will be described first.

As shown in FIGS. 1 to 3, the sleeve 10 of the present invention is provided with a plurality of engaging portions 20 protruding toward the center of the sleeve 10 at equal intervals on the inner wall and a plurality of grooves between two adjacent engaging portions 20沟29. The engaging portion 20 has a contour surface 21 facing the center of the sleeve 10. The contour surface 21 includes two equal width and intersecting inclined surfaces 22 and an apex angle 24 formed by the intersection of the inclined surfaces 22. The inclination angle θ of each inclined surface 22 is 2° to 9°, and the inclined angle is defined by the inclined surface 22 intersecting a chord line S, which refers to passing through the vertex angle 24 and the circumference of the sleeve 10 The straight line of two points A and B, and the vertical bisector L of the string S will pass through the center O of the sleeve. The engaging portion has two side surfaces 26 respectively facing the two grooves 29 on the adjacent side. The center angle P formed by the two side surfaces 26 is 30°~60°. Therefore, the end angle 28 where the inclined surface 22 and the side surface 26 intersect is Obtuse angle.

As shown in the fourth and fifth figures, the sleeve 10 is fitted with a normal screw 31 (nut or bolt head), the corner 311 of the normal screw 31 corresponds to the groove 29 of the sleeve 10, the normal screw The peripheral surface 312 of 31 corresponds to the outline surface 21 of the engaging portion 10.

As shown in the sixth and seventh figures, by rotating the sleeve 10 at an angle, the apex angle 24 of the engaging portion 10 and one of the inclined surfaces 22 are in contact with the peripheral surface 312 of the normal screw 31 and pressed tightly, the sleeve 10 is operable The normal screw 31 rotates.

As shown in the eighth and ninth figures, when the sleeve 10 and a wear screw 32 are combined and operated to rotate, the vertex 24 and one of the inclined surfaces 22 are in contact with and pressed against the peripheral surface 322 of the wear screw 32.

As shown in the tenth and eleventh figures, when the sleeve 10 and a severely worn screw 33 are combined and operated to rotate, the vertex 24 and a portion of the inclined surface 22 are in contact with the peripheral surface 332 of the severely worn screw 33 Pressing.

In the foregoing example, the sleeve 10 of the present invention can make surface contact with the normal screw 31, the worn screw 32, or the severely worn screw 33 through the engaging portion 11, so that the sleeve 10 can drive the screw to rotate.

As shown in the eleventh and twelfth figures, different inclination angles θ of the inclined surfaces cause the engaging portion 20 and the screw 33 to have different contact results. In the illustration, the screw 33 is severely worn as an example. In the eleventh figure, the inclined angle θ of the inclined plane is 2° to 4°, and the engaging portion 20 and the screw 33 come into surface contact as described above. As shown in FIG. 12, the inclination angle is 9°, the apex angle 24 of the engaging portion 20 is in contact with the screw 33, and the engaging portion 20 is in linear contact with the screw 33. For the screw 33 with severely worn operation, a sleeve with a large inclined angle θ can be selected, and the peripheral surface 332 of the screw 33 is forced and embedded by the apex angle 24. The sleeve 10 and the severely worn screw 33 There is a bite relationship between them. Compared with the aforementioned surface contact, the bite relationship will generate a stronger contact urging force, so that the sleeve 10 can drive the strict The heavily worn screw 33 rotates.

In addition, the aforementioned design of the inclination angle θ of the inclined surface 22 of the engaging portion 20 and the center angle P of the two side surfaces 26 of the engaging portion 20 makes the vertex angle 24 of the engaging portion 20 and the left and right end angles 28 obtuse, The corner of the engaging portion 20 can be prevented from damaging the screw fastener, and the structural strength of the engaging portion 20 can be increased to avoid or reduce the occurrence of angle collapse damage of the engaging portion 20.

Claims (1)

A non-slip sleeve includes: a plurality of engaging portions provided at equal intervals on the inner wall of a sleeve protruding toward the center of the sleeve, and a plurality of grooves between two adjacent engaging portions; The engaging portion has a contour facing the center of the sleeve, and the contour surface includes two intersecting inclined surfaces and an apex angle formed by the intersecting inclined surfaces; the engaging portion has two side grooves respectively facing the adjacent grooves , The end angle of the inclined plane and the side is obtuse; the width of the two inclined planes is equal; the inclined angle of the inclined plane is 2°~9°, the inclined angle is defined by the inclined plane intersecting a chord line S, the chord Line S refers to a straight line passing through the apex angle and two points A and B on the circumference of the sleeve, and the vertical bisector L of the string line S will pass through the center O of the sleeve; the center angle formed by the two sides is 30° ~60°.