CN113864308B

CN113864308B - Concealed connecting piece and drill bit matched with same

Info

Publication number: CN113864308B
Application number: CN202111309754.1A
Authority: CN
Inventors: 吴旺贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-07
Filing date: 2021-11-07
Publication date: 2024-06-21
Anticipated expiration: 2041-11-07
Also published as: CN113864308A

Abstract

The invention relates to a hidden connecting piece and a matched drill bit. The connecting piece comprises a self-tapping piece, a connecting rod, a flank and a rotating wheel, wherein the self-tapping piece consists of a threaded part, a shoulder part, a transition part and a locking part, the connecting rod consists of a connecting part, a shank part and a tail part, the flank consists of a left flank and a right flank which are the same in size and shape, one ends of the left flank and the right flank are provided with arc-shaped coupler knuckles which are split, the coupler knuckle is hooked on a supporting rod, the left flank and the right flank tightly hold the shank part of the connecting rod, the rotating wheel consists of a wheel rod and two elliptical wheels, the left flank and the right flank jointly form a space capable of containing the elliptical wheels, and the elliptical wheels are positioned in the space; the matched drill bit comprises a handle, a blade part and a head part, wherein the blade part is in a truncated cone shape, the diameter of the blade part is gradually increased from the handle to the head part, and the blade part and the head part are in tapered transitional connection. The invention has the advantages of complete hiding, accurate positioning, strong connection stability and low production cost.

Description

Concealed connecting piece and drill bit matched with same

Technical Field

The invention relates to a connecting piece for connecting furniture parts or machine parts, and a drill bit matched with the connecting piece, in particular to a hidden connecting piece which can be completely hidden after being installed and a drill bit matched with the connecting piece.

Background

The plate body connection of the furniture in the market at present mostly adopts a trinity connecting piece (also called eccentric connecting piece) composed of an eccentric wheel, a connecting rod and a connector embedded in the plate body, after the trinity connecting piece is installed, a nut of the eccentric wheel positioned at the connecting position is exposed, the attractiveness of a furniture finished product is seriously affected, and in order to improve, corresponding sticker or a face cover can be stuck at the exposed position only according to the material of the furniture plate body for shielding, but the attractiveness of the furniture finished product is still damaged, the grade of the furniture finished product is greatly reduced, and the product cannot enter a high-end market.

High-end furniture can be assembled by using hidden hardware connectors, such as crescent connectors, but the crescent connectors are required to be provided with special slotting equipment in factories, so that the purchase and use cost of the equipment are high, the technical upgrading of the equipment in factories is high, and the cost of the crescent connectors is high, so that the crescent connectors cannot be popularized in mass markets at present.

Disclosure of Invention

The invention aims to solve the technical problem of providing a hidden connecting piece which can realize complete hiding, accurate positioning, strong connection stability and low production cost and a drill bit matched with the connecting piece for use.

The invention solves the problems by adopting the following technical scheme: the connecting piece comprises a self-tapping piece and a connecting rod, and is structurally characterized by further comprising a flank and a rotating wheel, wherein the self-tapping piece sequentially comprises a thread part, a shoulder part, a transition part and a locking part, and the top end of the locking part is provided with a cross groove; the connecting rod sequentially comprises a connecting part, a rod body part and a tail part, wherein the end part of the connecting part is provided with a concave locking groove, the size and shape of the locking groove are matched with those of the transition part and the locking part of the self-tapping piece, the rod body part is provided with a through hole and a rotating wheel mounting part, a supporting rod is arranged in the through hole, the tail part is in a circular arch shape, and the tail part is provided with two symmetrical concave cambered surfaces; the side wings consist of left side wings and right side wings with the same size and shape, one ends of the left side wings and the right side wings are provided with split circular arc-shaped coupler knuckles, the coupler knuckles are hooked on the supporting rods, the left side wings and the right side wings tightly hold the rod body parts of the connecting rods, and the inner side surfaces of the left side wings and the right side wings are provided with inwards concave limiting grooves; the runner comprises wheel pole and two oval wheels, and two oval wheels are installed in the both sides of wheel pole, and wheel pole rotationally is located runner installation department, and left flank and right flank constitute jointly and can hold oval wheel's space, and oval wheel is located the space, and the size shape in space is matchd with oval wheel, and oval wheel closely laminates with left flank, right flank's medial surface.

The diameter of the shoulder part of the self-tapping piece is larger than that of the threaded part, the diameter of the shoulder part is the same as that of the connecting part, and the diameter of the transition part is smaller than that of the locking part.

The rotating wheel mounting part on the connecting rod is a through hole or a concave U-shaped groove.

The arrangement mode of the left flank and the right flank is that the right flank is the same as the left flank after rotating 180 degrees around the connecting rod.

The outer side surfaces of the left side wing and the right side wing are provided with a plurality of convex lines.

The locking groove consists of a through inner groove and an outer groove, wherein the inner groove is matched with the fixing part of the self-tapping piece in size and shape, and the outer groove is matched with the transition part of the self-tapping piece in size and shape.

The wheel rod is regular hexagonal prism, the center of the elliptical wheel is a connecting hole with an inner hexagon, and the wheel rod is in interference fit with the connecting hole.

The drill bit matched with the hidden connecting piece comprises a handle part, a blade part and a head part which are integrally structured, and is structurally characterized in that the blade part is in a truncated cone shape, the diameter of the blade part is gradually increased from the handle part to the head part, and the blade part and the head part are in tapered transitional connection.

The cutting part is provided with a spiral chip removing groove, and the intersection of the chip removing groove and the surface of the cutting part is a cutting edge.

Compared with the prior art, the invention has the following beneficial effects: 1. the connecting piece is composed of a self-tapping piece, a connecting rod, a side wing, a rotating wheel and the like, the self-tapping piece is fixedly connected with the plate body A in a threaded manner, the self-tapping piece is connected with the connecting rod through a locking groove, the rotating wheel is rotated through an outer hexagonal screw rod, the side wing can be unfolded, the connecting rod is fixed with the plate body B, and accordingly the plate body A and the plate body B are connected together. 2. The connecting piece is only required to be provided with a matched drill bit, the diameter of the cutting part of the drill bit is in a truncated cone shape, the diameter of the cutting part is gradually increased from the handle part to the head part, the cutting part and the head part are in tapered transitional connection, a drilling mode of swinging left and right after the drilling plate body is drilled in a certain depth is matched during drilling, and a mounting hole matched with the shape of the connecting piece can be drilled, so that the plate body A and the plate body B are connected by using the connecting piece, other required technical and equipment requirements are that the gang drill and the processing center of the existing furniture production line are all present, most factories do not need to purchase other special equipment, the existing technical and equipment can be directly used for upgrading hidden hardware, the product upgrading and subsequent manufacturing cost are reduced, and the market popularization rate is improved.

Drawings

Fig. 1 is a front view of a self-tapping member according to embodiment 1 of the present invention.

Fig. 2 is a perspective view of the self-tapping member in embodiment 1 of the present invention.

Fig. 3 is a front view of the connecting rod in embodiment 1 of the present invention.

Fig. 4 is a perspective view of the connecting rod in embodiment 1 of the present invention.

Fig. 5 is a perspective view of the assembled connecting rod and supporting rod in embodiment 1 of the present invention.

Fig. 6 is a perspective view of another angle of the connecting rod and the supporting rod in embodiment 1 of the present invention.

Fig. 7 is a front view of the side flap in example 1 of the present invention.

Figure 8 is a top view of a side flap in example 1 of the present invention.

Fig. 9 is a left side view of the side flap of example 1 of the present invention.

Fig. 10 is a perspective view of a side flap in example 1 of the present invention.

FIG. 11 is an exploded view of the side flap of example 1 of the present invention.

Fig. 12 is a perspective view of a wheel according to embodiment 1 of the present invention.

Fig. 13 is an exploded view of the wheel of embodiment 1 of the present invention.

Fig. 14 is a front view of example 1 of the present invention (when the side flaps are not spread apart).

Fig. 15 is a perspective view of example 1 of the present invention (when the side flaps are not spread apart).

Fig. 16 is a front view (with the side flaps extended) of example 1 of the present invention.

Fig. 17 is a perspective view of example 1 of the present invention (with the side wings being spread apart).

Fig. 18 is a front view of the drill in embodiment 1 of the present invention.

Fig. 19 is a top view of the drill bit in example 1 of the present invention.

Fig. 20 is a perspective view of a drill bit according to embodiment 1 of the present invention.

Fig. 21 to 30 are operation diagrams of embodiment 1 of the present invention.

Fig. 31 is a front view of the connecting rod in embodiment 2 of the present invention.

Fig. 32 is a perspective view of the connecting rod in embodiment 2 of the present invention.

Fig. 33 and 34 are perspective views showing other angles of the connecting rod in embodiment 2 of the present invention.

Detailed Description

Example 1:

The embodiment comprises a self-tapping piece 1, a connecting rod 2, a flank 3 and a rotating wheel 4, which can be made of metal materials or PVC plastic materials, etc.

Referring to fig. 1 and 2, the self-tapping member 1 is sequentially composed of a threaded portion 11, a shoulder portion 12, a transition portion 13 and a locking portion 14 which are integrally formed, threads are arranged on the threaded portion 11, the diameter of the shoulder portion 12 is larger than that of the threaded portion 11, the diameter of the transition portion 13 is smaller than that of the locking portion 14, and a cross groove 15 matched with a cross screwdriver is formed in the top end of the locking portion 14.

Referring to fig. 3 to 6, the connecting rod 2 is composed of a connecting portion 21, a shaft portion 22 and a tail portion 23, which are integrally formed in this order. The diameter of the connecting part 21 is the same as that of the shoulder 12, the end part of the connecting part 21 is provided with a concave locking groove 24, the locking groove 24 consists of a through inner groove 241 and an outer groove 242, wherein the inner groove 241 is matched with the locking part 14 of the self-tapping member 1 in size and shape, and the outer groove 242 is matched with the transition part 13 of the self-tapping member 1 in size and shape. The shaft portion 22 is provided with a through hole 25 and a rotor attachment portion 26, and the rotor attachment portion 26 in this embodiment is a through hole. The through hole 25 is internally provided with a supporting rod 28, the tail part 23 is in a circular arch shape, and the tail part 23 is provided with two symmetrical concave cambered surfaces 27, so that the tail part 23 forms a flat tail shape.

Referring to fig. 7 to 11, the wing 3 is composed of a left wing 31 and a right wing 32 having the same size and shape, and outer sides of the left wing 31 and the right wing 32 are provided with a plurality of convex textures 303 for increasing friction force. The left flank 31 and the right flank 32 are arranged in such a way that the right flank 32 is identical to the left flank 31 after a rotation of 180 degrees around the connecting rod 2. One end of the left flank 31 and the right flank 32 are provided with split circular arc-shaped coupler knuckle 301, and the inner side surfaces of the left flank 31 and the right flank 32 are provided with concave limiting grooves 302.

Referring to fig. 12 and 13, the wheel 4 is composed of a wheel bar 42 and two elliptical wheels 41, the wheel bar 42 is in a regular hexagonal prism shape, the two elliptical wheels 41 are installed on two sides of the wheel bar 42, and the elliptical wheels 41 are in interference fit with the wheel bar 42.

Referring to fig. 14-17, the wheel bar 42 is rotatably positioned within the wheel mounting portion 26, with the coupler knuckle 301 of the left and right side wings 31, 32 hooked on the support bar 28, while the left and right side wings 31, 32 hug the shaft portion 22 of the connecting bar 2. The left flank 31 and the right flank 32 together form a space 304 which can accommodate the elliptical wheel 41, the elliptical wheel 41 is positioned in the space 304, the size and shape of the space 304 are matched with those of the elliptical wheel 41, and the outer contour of the elliptical wheel 41 is tightly attached to the inner side surfaces of the left flank 31 and the right flank 32.

Referring to fig. 18-20, the drill bit 5 used with the hidden connecting piece comprises a shank 51, a blade 52 and a head 53 which are integrally structured, wherein the blade 52 is in a truncated cone shape, the diameter of the blade is gradually increased from the shank 51 to the head 53, and the blade 52 and the head 53 are in tapered transitional connection. The blade portion 52 is provided with a spiral chip groove 522, and the cutting edge 521 is formed at the intersection of the chip groove 522 and the surface of the blade portion 52.

The working process of this embodiment takes a connection board a and a board B as an example, and specifically includes the following steps:

1. Referring to fig. 21 and 22, after a drill bit 5 used together with the hidden connecting piece is drilled into the side surface of the plate body B to a certain depth, a mounting hole B1 is drilled in a left-right swinging mode, the mounting hole B1 is a blind hole, the depth of the mounting hole is larger than the sum of the lengths of the connecting rod 2 and the shoulder 12, under the combined action of the drill bit shape and the left-right swinging drilling mode, the specific shape of the mounting hole B1 is shown in fig. 23-26, the mounting hole B1 consists of a front part B11 and a rear part B12, the cross section E-E of the mounting hole B1 is shown in fig. 24, on the cross section, the front part B11 is rectangular, the rear part B12 is an inward concave arc surface, the cross section F-F of the mounting hole B1 is shown in fig. 25, on the cross section, the front part of the front part B11 is rectangular, the rear part is an outward arc surface, the diameter of the rear part is gradually increased from the front part B11 to the rear part B12, the width of the mounting hole B1 is larger than the height, the rear part B12 is a concave arc surface, and the rear part of the rear part B12 is in a flat shape of the flat bar 23 is in the shape of the flat bar 23;

2. Referring to fig. 21, a twist drill C is used to drill a mounting hole B2 penetrating the mounting hole B1 on the front surface of the plate body B, wherein the distance between the center of the mounting hole B2 and the side surface of the plate body b=the sum of the lengths of the shoulder 12 and the connecting portion 201+the distance between the center of the wheel mounting portion 26 and the connecting portion 201;

3. referring to fig. 26 and 27, using a cross screw driver, the screw portion 11 of the self-tapping member 1 is screwed into the plate body a with the cross groove 15 of the self-tapping member 1 engaged until the shoulder 12 is completely abutted against the plate body a, then the transition portion 13 of the self-tapping member 1 is placed in the outer groove 242, the locking portion 14 is placed in the inner groove 241, and the self-tapping member 1 and the connecting rod 2 are connected together;

4. referring to fig. 27 and 28, the connecting rod 2 is inserted into the mounting hole B1, the flat tail shape of the tail portion 23 is limited by the shape of the rear portion B12 of the mounting hole B1, the tail portion 23 is automatically aligned with the rear portion B12, and the tail portion 23 and the rear portion B12 are closely attached, so that the connecting hole 43 of the elliptical wheel 41 is aligned with the mounting hole B2;

5. referring to fig. 28 to 30, an external hexagonal screw D is used, which is inserted into the connection hole 43 of the elliptical wheel 41 from the installation hole B2, and then the external hexagonal screw D is rotated, the external hexagonal screw D drives the rotating wheel 4 to rotate, the elliptical wheel 41 also rotates along with the rotation of the rotating wheel 4, the distance between the left flank 31 and the right flank 32 is changed from the short axis length of the elliptical wheel 41 to the long axis length of the elliptical wheel 41, the left flank 31 and the right flank 32 rotate in opposite directions with the support bar 28 as a center point and are gradually spread until both ends of the long axis of the elliptical wheel 41 enter the limiting groove 302, at this time, the spread width of the left flank 31 and the right flank 32 is maximized, the elliptical wheel 41 is limited by the limiting groove 302, and the rotating wheel 4 is fixed;

6. Referring to fig. 30, after the left side wing 31 and the right side wing 32 are opened, on the F-F cross section of the mounting hole B1, the shapes of the left side wing 31 and the right side wing 32 are matched with the shape of the rear section of the front portion B11 of the mounting hole B1, and the connecting rod 2 is fixed, so that the plate body a and the plate body B are connected together, and the friction force between the left side wing 31 and the right side wing 32 and the mounting hole B1 can be increased by the convex lines 303, so that the connection of the left side wing 31 and the right side wing 32 is more compact and reliable.

Example 2:

Referring to fig. 31-34, the wheel mounting portion 26 in this embodiment is a concave U-shaped channel, and the wheel bar 42 is rotatably located within the wheel mounting portion 26. The rest of the structure and the operation process are the same as those of embodiment 1, and will not be described again.

The present invention is not limited to the specific embodiment of the present invention, and the present invention can be used for connecting not only furniture parts but also machine parts and other places where connection is required.

Claims

1. The utility model provides a hidden connecting piece, includes self-tapping piece (1) and connecting rod (2), characterized by: the self-tapping device is characterized by further comprising a flank (3) and a rotating wheel (4), wherein the self-tapping piece (1) sequentially comprises a threaded part (11), a shoulder part (12), a transition part (13) and a locking part (14), and a cross groove (15) is formed in the top end of the locking part (14); the connecting rod (2) sequentially comprises a connecting part (21), a rod body part (22) and a tail part (23), wherein an inwards concave locking groove (24) is formed in the end part of the connecting part (21), the size and shape of the locking groove (24) are matched with those of a transition part (13) and a locking part (14) of the self-tapping piece (1), a through hole (25) and a rotating wheel mounting part (26) are formed in the rod body part (22), a supporting rod (28) is arranged in the through hole (25), the tail part (23) is in a circular arch shape, and two symmetrical inwards concave cambered surfaces (27) are formed in the tail part (23); the side wings (3) are composed of left side wings (31) and right side wings (32) which are the same in size and shape, one ends of the left side wings (31) and the right side wings (32) are provided with split circular arc-shaped coupler knuckles (301), the coupler knuckles (301) are hooked on the supporting rods (28), meanwhile, the left side wings (31) and the right side wings (32) tightly hold the rod body parts (22) of the connecting rods (2), and inner side surfaces of the left side wings (31) and the right side wings (32) are provided with inwards concave limiting grooves (302); the runner (4) comprises a wheel rod (42) and two elliptic wheels (41), the two elliptic wheels (41) are arranged on two sides of the wheel rod (42), the wheel rod (42) is rotatably arranged in the runner installation part (26), the left flank (31) and the right flank (32) jointly form a space (304) capable of containing the elliptic wheels (41), the elliptic wheels (41) are arranged in the space (304), the size and shape of the space (304) are matched with those of the elliptic wheels (41), and the elliptic wheels (41) are tightly attached to the inner side surfaces of the left flank (31) and the right flank (32).

2. A hidden connector according to claim 1, wherein: the diameter of the shoulder (12) of the self-tapping piece (1) is larger than that of the threaded portion (11), the diameter of the shoulder (12) is the same as that of the connecting portion (21), and the diameter of the transition portion (13) is smaller than that of the locking portion (14).

3. A hidden connector according to claim 1, wherein: the rotating wheel mounting part (26) on the connecting rod (2) is a through hole or a concave U-shaped groove.

4. A hidden connector according to claim 1, wherein: the left flank (31) and the right flank (32) are arranged in the same way that the right flank (32) is identical to the left flank (31) after rotating 180 degrees around the connecting rod (2).

5. A hidden connector according to claim 1, wherein: the outer side surfaces of the left side wing (31) and the right side wing (32) are provided with a plurality of convex lines (303).

6. A hidden connector according to claim 1, wherein: the locking groove (24) consists of a through inner groove (241) and an outer groove (242), wherein the inner groove (241) is matched with the fixed part (14) of the self-tapping piece (1) in size and shape, and the outer groove (242) is matched with the transition part (13) of the self-tapping piece (1) in size and shape.

7. A hidden connector according to claim 1, wherein: the wheel rod (42) is regular hexagonal prism, the center of the elliptical wheel (41) is a connecting hole (43) with an inner hexagon, and the wheel rod (42) and the connecting hole (43) are in interference fit.

8. A drill bit for use with the hidden connector of any one of claims 1-7, comprising a shank (51), a blade (52) and a head (53) of unitary construction, characterized by: the blade part (52) is in a truncated cone shape, the diameter of the blade part is gradually increased from the handle part (51) to the head part (53), and the blade part (52) and the head part (53) are in tapered transitional connection.

9. The drill bit for use with a hidden connector of claim 8, wherein: the blade part (52) is provided with a spiral chip removing groove (522), and the intersection of the chip removing groove (522) and the surface of the blade part (52) is a cutting blade (521).