TWI440775B - Fastener, driver engaging with the fastener and punch for producing the fastener - Google Patents

Description

Fastener, driving member matched therewith and punch for forming the fastener

The present invention relates to a fastener, a drive member mated with the fastener, and a punch for forming the fastener.

Fasteners are widely used in various fields of the machine industry to securely connect two or more parts together. The fastener generally includes a screwing portion and a head portion disposed at one end of the screwing portion. The end surface of the head portion away from the screwing portion is recessed with a dismounting groove, and the inner wall of the dismounting groove is provided with a plurality of angular corners. Generally, the driving member cooperates with the corner to install or disassemble the fastener. For the interchangeable fastener, the corner will suffer destructive wear during frequent disassembly or installation, so that the driving member is installed or disassembled. The phenomenon of slippage in the removal groove causes the driving efficiency to be low, which in turn affects the service life of the fastener.

In view of the above, it is necessary to provide a fastener that has a long service life and is not easy to slip, a driving member that cooperates with the fastener, and a punch that forms the fastener.

A fastener includes a connecting screw portion and a head portion, the head portion being provided with a dismounting groove. The detaching groove is an even-numbered polygonal groove above the hexagon. The detaching groove includes a plurality of first side walls and a plurality of second side walls, and each of the first side walls is spaced apart between the two adjacent second side walls, and each first The sidewall is connected to the adjacent two second sidewalls, each of the first sidewalls A trapezoidal resisting tooth is protruded from a center of the head toward the center of the head, and a hexagonal engaging groove is formed between each two adjacent abutting teeth, and each of the engaging grooves is formed by two adjacent partial first side walls. And a second sidewall sandwiched between the two adjacent first sidewalls.

A driving member comprising a rod portion and a mating portion connected to the rod portion, wherein the engaging portion is provided with a engaging portion corresponding to the dismounting groove of the fastener of claim 1 in a position away from the end of the stem portion, the card A plurality of hexagonal prism-shaped engaging teeth that are engaged with the engaging grooves of the fastener are protruded in the radial direction on the side wall of the joint.

A punch having a punch, the punch including a stamping portion matched with a dismounting groove of the fastener, and a sidewall of the stamping portion is convexly disposed in a radial direction to match a plurality of engaging grooves of the fastener A hexagonal prismatic stamping edge.

The fastener adopts a plurality of engaging grooves and a plurality of resisting teeth, each engaging groove is located between each two adjacent abutting teeth, and the driving member is engaged with the engaging groove of the fastener to make the side wall of the driving member and the card The side wall of the groove is in surface contact, and the driving member abuts against the abutting tooth of the fastener, so that the driving member is not easy to slip in the disassembly groove of the fastener, thereby driving the maximum torque and having high driving efficiency. In addition, by setting a plurality of engaging grooves, the force applied to each of the engaging grooves can be reduced, thereby reducing wear during disassembly or installation and prolonging the service life.

100‧‧‧fasteners

11‧‧‧ head

110‧‧‧ end face

13‧‧‧Removal slot

130‧‧‧Chamfering

131‧‧‧Resistance

132‧‧‧First side wall

1311‧‧‧Removal surface

1313‧‧‧Resistance

133‧‧‧ snap groove

134‧‧‧ second side wall

15‧‧‧ screw joint

151‧‧‧ thread

200‧‧‧ drive parts

21‧‧‧ pole

211‧‧‧ Subject

213‧‧‧ grips

23‧‧‧Matement Department

230‧‧‧Care Department

231‧‧‧Knitting teeth

2311‧‧‧First side to face

2313‧‧‧The second side is facing

300‧‧‧ punches

31‧‧‧Ontology

33‧‧‧ Punch

331‧‧‧ base

3311‧‧‧Bevel

333‧‧ ‧ Stamping Department

3331‧‧‧ Stamping blade

1 is a perspective view of a fastener and a driving member according to an embodiment of the present invention.

Figure 2 is an enlarged perspective view of the fastener of Figure 1.

Figure 3 is an enlarged perspective view of the driving member of Figure 1.

Figure 4 is a perspective view of a punch for molding the fastener of Figure 1.

The fastener of the present invention, the driving member matched therewith, and the punch for forming the fastener will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIGS. 1 and 2 , the fastener 100 includes a head portion 11 and a screwing portion 15 connected to the head portion 11 . The head portion 11 has an end surface 110 away from one end of the screw portion 15 and is recessed inward from the center of the end surface 110 . The removal groove 13 is formed. The threaded portion 15 has a rod-like structure with a thread 151 formed thereon.

The detaching groove 13 is a polygonal groove formed with a chamfer 130 away from the end edge of the screw portion 15. In the present embodiment, the detaching groove 13 is a hexagonal groove. The removal slot 13 includes three first sidewalls 132 and three second sidewalls 134. The three first sidewalls 132 are spaced apart from the three second sidewalls 134 , and each of the first sidewalls 132 is connected to the adjacent two second sidewalls 134 . The first side wall 132 is larger than the second side wall 134, and the extension faces of the three first side walls 132 or the third second side walls 134 respectively define an isosceles triangle. A resisting tooth 131 is protruded from a center of each of the first side walls 132 of the detaching groove 13 toward the center of the head portion 11. An engaging groove 133 is formed between each of the two adjacent abutting teeth 131, and the number of the engaging grooves 133 is three.

Each of the abutting teeth 131 includes a resisting surface 1313 and two detaching surfaces 1311 respectively connected to the abutting surface 1313. The abutting surface 1313 is disposed in parallel with the first side wall 132. The detaching surface 1311 and the abutting surface 1313 are disposed at an angle. In the present embodiment, the resisting teeth 131 have a trapezoidal shape, and the angle between the detaching surface 1311 and the abutting surface 1313 is 120 degrees.

Each of the engaging grooves 133 is composed of two adjacent first side walls 132 and a second side wall 134 sandwiched between the two adjacent first side walls 132. The second sidewall 134 is disposed at an angle to the first sidewall 132. In this embodiment, the engaging groove 133 is a hexagonal groove, and the angle between the second side wall 134 and the first side wall 132 is 120 degrees. The dismounting surface 1311 is connected to the first side wall 132 and disposed at an angle. In this embodiment, the split The angle between the unloading surface 1311 and the first side wall 132 is 120 degrees.

Referring to FIG. 3 together, the driving member 200 for use with the fastener 100 includes a rod portion 21 and a fitting portion 23 coaxially connected to the rod portion 21 and located at the end of the rod portion 21. The rod portion 21 has a substantially stepped shaft shape and includes a main body 211 and a grip portion 213 connected to one end of the main body 211. The engaging portion 23 has a substantially cylindrical shape, and the opposing grip portion 213 is axially protruded from the other end of the main body 211. The shaft diameter of the engaging portion 23 is larger than the shaft diameter of the main body 211. The engaging portion 230 is protruded from the end surface of the engaging portion 23 away from the main body 211. The engaging groove 133 of the corresponding fastening member 100 on the side wall of the engaging portion 230 is provided with a plurality of engaging teeth 231 protruding in the radial direction. In the present embodiment, the number of the engaging teeth 231 is three. The engaging teeth 231 include a first side abutting surface 2311 and two second side abutting surfaces 2313 respectively connected to the first side abutting surface 2311, and the two are disposed at a certain angle. In the present embodiment, the engaging teeth 231 have a hexagonal prism shape, and the angle between the first side abutting surface 2311 and the second side abutting surface 2313 is 120 degrees. When the engaging portion 230 is engaged with the detaching groove 13 of the fastener 100, the first side abutting surface 2311 and the second side abutting surface 2313 are respectively engaged with the detaching surface 1311 and the first side wall 132.

Referring to FIG. 4 together, the punch 300 for forming the fastener 100 includes a body 31 and a punch 33 formed by one end of the body 31. The body 31 has a cylindrical structure, and may of course be a rod-like structure having a rectangular or other shape in cross section. The punch 33 includes a base 331 and a stamping portion 333 protruding from the base 331. The chamfer 130 corresponding to the detaching groove 13 on the side wall of the base 331 has a slope 3311 inclined toward the punching portion 333 to correspondingly punch out the fastener. 100 chamfer 130. The shape and size of the punching portion 333 correspond to the detaching groove 13 of the head portion 11 and correspond to the engaging portion 230 of the driving member 200. A plurality of punching edges 3331 are protruded in the radial direction from the engaging grooves 133 of the corresponding fasteners 100 on the side wall of the punching portion 333. In the present embodiment, the number of the punching edges 3331 is three, and the punching edge 3331 is a hexagonal prism shape corresponding to the punching groove 133 of the fastener 100.

When the fastener 100 is driven by the driving member 200, the engaging portion 230 of the driving member 200 is inserted into the dismounting groove 13 of the head 11 of the fastener 100, wherein the first side abutting surface 2311 of the engaging tooth 231 of the engaging portion 230 And the second side abutting surface 2313 respectively cooperates with the dismounting surface 1311 of the fastener 100 and the first side wall 132, and applies a circumferential thrust force to the dismounting surface 1311 and the first side wall 132 by the engaging teeth 231, thereby tightening The firmware 100 rotates in synchronization with the drive member 200.

When the fastener 100 is molded using the punch 300, the cylindrical head portion 11 is punched by a punch to form the detaching groove 13 of the head portion 11.

The fastener 100 is provided with a three-engagement groove 133 and three abutting teeth 131. Each of the engaging grooves 133 is located between two adjacent abutting teeth 131, and the first side wall 132 is connected to the dismounting surface 1311 of the resisting tooth 131. A certain angle setting. The engaging teeth 231 of the driving member 200 are engaged with the engaging grooves 133 of the fastener 100, and the first side abutting surface 2311 and the second side abutting surface 2313 are in surface contact with the dismounting surface 1311 and the first side wall 132, respectively, and the engaging portion 230 Cooperating with the abutting teeth 131, the driving member 200 is not easy to slip in the dismounting groove 13 of the fastener 100, thereby driving the maximum torque and having high driving efficiency. In addition, by providing the plurality of engaging grooves 133, the force applied to each of the engaging grooves 133 can be reduced, thereby reducing wear during disassembly or installation, and prolonging the service life.

It can be understood that the shape of the detaching groove 13 is not limited to the hexagonal groove in the embodiment, and the detaching groove 13 may be an even-numbered polygonal groove above the hexagonal shape, and then has a space convex on the sidewall of the even-numbered polygonal groove. It is sufficient to set the tooth 131, and the specific shape of the detaching groove 13 can be changed according to actual needs.

It can be understood that the number of the first side wall 132 and the second side wall 134 is not limited to three in the embodiment, and is changed according to the shape of the detaching groove 13.

It can be understood that the chamfer 130 can also be omitted directly, and the inclined surface 3311 of the punch 33 corresponding to the punch 300 can also be omitted, which can be changed according to actual needs.

It can be understood that the number of the resisting teeth 131 and the engaging grooves 133 is not limited to three in the embodiment, and may be less than three or more than three, the engaging teeth 231 of the driving member 200 and the punching portion 333 of the punch 300. The number may be set corresponding to the number of the resisting teeth 131 and the engaging grooves 133.

It can be understood that the angle between the first side wall 132 and the dismounting surface 1311, the angle between the second side wall 134 and the first side wall 132, and the angle between the dismounting surface 1311 and the first side wall 132 are not limited to 120 in the embodiment. The degree can also be less than 120 degrees or more than 120 degrees, which can be changed according to actual needs.

It can be understood that the shape of the engaging groove 133 is not limited to the hexagonal shape in the embodiment, and may be an octagonal shape, and then the octagonal engaging groove 133 is connected to the resisting tooth 131, correspondingly, the card The shape of the engaging teeth 231 and the punching edge 3331 may be set in accordance with the shape of the engaging groove 133.

It can be understood that the dismounting groove 13 of the fastener 100 is not limited to the inner concave structure in the embodiment, and the protruding structure similar to the engaging portion 230 of the driving member 200 can also be adopted. Correspondingly, the driving member 200 and the punch 300 have a concave structure.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

100‧‧‧fasteners

11‧‧‧ head

13‧‧‧Removal slot

15‧‧‧ screw joint

151‧‧‧ thread

200‧‧‧ drive parts

21‧‧‧ pole

211‧‧‧ Subject

213‧‧‧ grips

23‧‧‧Matement Department

231‧‧‧Knitting teeth

Claims (10)

A fastener comprising a connecting screw portion and a head portion, the head portion being provided with a dismounting groove, wherein the disassembling groove is a hexagonal groove or an even-numbered polygonal groove having a hexagonal shape or more, the disassembling The slot includes a plurality of first sidewalls and a plurality of second sidewalls, each of the first sidewalls is spaced between each of the two adjacent second sidewalls, and each of the first sidewalls is connected to the adjacent two second sidewalls, each of the first sidewalls A trapezoidal resisting tooth is protruded from a center of the head, and a hexagonal engaging groove is formed between each adjacent abutting tooth, and each of the engaging grooves is formed by two adjacent portions of the first side wall and the clip. The second sidewall is formed between the two adjacent first sidewalls. The fastener of claim 1, wherein each of the resisting teeth comprises a second dismounting surface, the dismounting surface being connected to the first side wall and disposed at an angle. The fastener of claim 2, wherein each of the resisting teeth further comprises a resisting surface respectively connected to the two disassembling surfaces, the abutting surface being parallel to the first side wall. The fastener of claim 1, wherein the end of the detaching groove away from the screw portion is chamfered. The fastener of claim 1, wherein the dismounting groove is a hexagonal groove, the number of the first side wall is three, and the number of the second side wall is also three, and the size of each of the first side walls. Greater than the size of the second side wall, and the intersection of the extended faces of the three first side walls or the three second side walls respectively define an isosceles triangle. A driving member comprising a rod portion and a mating portion connected to the rod portion, wherein the fitting portion is provided with a card corresponding to the dismounting groove of the fastener of the first application patent of claim 1 And a plurality of hexagonal prism-shaped engaging teeth that are engaged with the engaging grooves of the fasteners are protruded from the side walls of the engaging portion. The driving member according to claim 6, wherein the engaging teeth include interconnected The first side abutting surface and the second side abutting surface respectively connected to the first side abutting surface are disposed at a certain angle. The driving member according to claim 7, wherein an angle between the first side abutting surface and the second side abutting surface is 120 degrees. A punch having a punch, the improvement comprising: the punch comprising a stamping portion matched with a dismounting groove of the fastener according to claim 1 of the patent application, wherein the side wall of the stamping portion is convexly arranged in a radial direction A plurality of hexagonal prismatic stamping edges that match the engagement grooves of the fastener. The punch of claim 9, wherein the punch further comprises a base body convexly provided with the punch, and a side surface of the base body is inclined to face the press portion.