Wall tapper

Abstract

The utility model relates to the technical field of wall tappers, and discloses a wall tapper which comprises a connecting rod fixed with a rotating shaft of an electric hammer and a tapping drill bit, a rotating rod is arranged at the end part, opposite to the connecting rod, of the tapping drill bit, the rotating rod is inserted into the connecting rod, and an adjusting sleeve is connected to the outer side of the connecting rod through threads. A second guide groove is annularly formed in the outer side of the connecting rod and communicates with the interior of the connecting rod, a limiting clamping block is movably connected into the second guide groove, and an upper guide inclined face and a lower guide inclined face are arranged on the upper side and the lower side of the inner end of the limiting clamping block correspondingly. A first guide groove used for sliding of the guide block is annularly formed in the position, opposite to the guide block, of the connecting rod. Through the arrangement of the limiting clamping block and the adjusting sleeve, after the limiting clamping block is inserted into the stepped groove, the position of the trepanning drill bit can be limited, operation is easy, assistance of any tool is not needed, and the use convenience of the trepanning device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wall hole opening, in particular to a wall hole opener. Background Art

[0002] The hole opener is installed on an ordinary electric drill, and can conveniently cut round holes, square holes, triangular holes, straight lines and curves on any curved surfaces such as flat surfaces, spherical surfaces, etc. of various plates such as copper, iron, stainless steel, and plexiglass. There are two common types: fixed diameter and variable diameter. Variable diameter hole openers are often used in indoor and outdoor decoration.

[0003] The wall hole opener needs to be used in conjunction with an electric drill. In the prior art, the connection between the hole opener and the electric drill is generally fastened by bolts. Since the bolts require special tools to operate, it is inconvenient to install the hole opener, and the wall hole opener cannot be disassembled anytime and anywhere without being restricted by tools, which reduces the convenience of using the hole opener. In view of this, we propose a wall hole opener. Utility Model Content

[0004] The purpose of the utility model is to provide a wall hole opener to solve the problem in the prior art proposed in the above background technology that the connecting bolts between the hole opener and the electric drill require special tools to operate, which brings inconvenience to the installation of the hole opener, and the wall hole opener cannot be disassembled anytime and anywhere without being restricted by tools, which reduces the convenience of using the hole opener.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wall hole opener, comprising a connecting rod fixed to the rotating shaft of an electric hammer and a hole-opening drill bit, the hole-opening drill bit and the connecting rod are provided with a rotating rod at the opposite ends, the rotating rod is inserted into the inside of the connecting rod, the outside of the connecting rod is connected with an adjusting sleeve by a thread, the outside of the connecting rod is provided with a guide groove II in an annular shape, the guide groove II is communicated with the inside of the connecting rod, and a limiting block is movably connected inside the guide groove II, the upper and lower sides of the inner end of the limiting block are respectively provided with an upper guide bevel and a lower guide bevel, the rotating rod and the connecting rod The opposite end is provided with a guide block in the form of an annular guide block, and the connecting rod is provided with a guide groove I for sliding in an annular position relative to the guide block.

[0006] Preferably, the guide block is spaced apart from the end surface of the rotating rod, and the guide block is arranged below the limiting block.

[0007] Preferably, a stepped groove is provided above the guide block, and the limit clamping block is movably inserted into the stepped groove.

[0008] Preferably, the limit block and the guide block are arranged alternately, and the limit block and the guide block are in contact.

[0009] Preferably, a side guide slope is provided at the outer end of the limit block, and the side guide slope forms an angle less than 90 degrees with the lower end surface of the limit block.

[0010] Preferably, the included angle between the upper guiding bevel and the lower guiding bevel is less than 90 degrees, and both the upper guiding bevel and the lower guiding bevel are inclined toward the inner end of the limiting block.

[0011] Preferably, the width of the stepped groove is equal to the thickness of the limiting block.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. This wall hole opener is configured by threading an adjusting sleeve and a limiting block on a connecting rod, and making the limiting block distributed in a ring shape on the connecting rod. After the limiting block is released from the restriction of the adjusting sleeve, during the process of inserting the rotating rod on the hole drill bit into the inner side of the connecting rod, the guide block is inserted into the inside of the guide groove 1, so that the rotating rod of the hole drill bit and the connecting rod will not rotate relative to each other. As the rotating rod continues to be inserted, the limiting block will move from the inside to the outside. After the rotating rod contacts the connecting rod, the limiting block and the inner and outer sides of the stepped groove are relative. By rotating the adjusting sleeve in the opposite direction, the limiting block can be inserted into the stepped groove, which limits the position of the hole drill bit. The operation is easy and does not require any tool assistance, thereby improving the convenience of using the hole opener. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of a partial cross-section of the main view of the utility model;

[0016] Figure 3 It is a schematic diagram of the top-sectional structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the drill bit structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the connection between the adjustment sleeve and the connecting rod of the utility model;

[0019] Figure 6 It is a schematic diagram of the limit card block structure of the utility model.

[0020] In the figure: 1. adjusting sleeve; 2. rotating rod; 21. guide groove 1; 22. stepped groove; 23. hole drilling bit; 3. connecting rod; 31. guide block; 32. guide groove 2; 4. limit block; 41. upper guide slope; 42. lower guide slope; 43. side guide slope. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example: See Figure 1-6 The utility model provides a technical solution: a wall hole opener, which is mainly aimed at improving the problem that in the prior art, since the connection bolts between the hole opener and the electric drill need special tools to operate, it is inconvenient to install the hole opener, and it is impossible to disassemble the wall hole opener at any time and anywhere without being restricted by tools, which reduces the convenience of using the hole opener. The specific scheme is as follows: it includes a connecting rod 3 fixed to the rotary shaft of the electric hammer and a hole opening drill bit 23, wherein the hole opening drill bit 23 is provided with a rotating rod 2 at the opposite end of the connecting rod 3, the rotating rod 2 and the hole opening drill bit 23 are fixedly installed, the rotating rod 2 is inserted into the inside of the connecting rod 3, and a hole groove inserted by the rotating rod 2 is provided inside the connecting rod 3, and the diameter of the hole groove is equal to the outer diameter of the rotating rod 2.

[0023] See also Figure 1 The adjusting sleeve 1 is connected to the outside of the connecting rod 3 by threads, and the connecting rod 3 is provided with a second guide groove 32 in an annular shape. The second guide groove 32 is connected to the inside of the connecting rod 3, and the second guide groove 32 is movably connected to a limit block 4. The limit block 4 can move radially on the connecting rod 3 along the center line direction of the connecting rod 3 through the setting of the second guide groove 32.

[0024] See also Figure 2 and Figure 6 . An upper guiding bevel 41 and a lower guiding bevel 42 are respectively provided on the upper and lower sides of the inner end of the limit block 4, the angle between the upper guiding bevel 41 and the lower guiding bevel 42 is less than 90 degrees, and both the upper guiding bevel 41 and the lower guiding bevel 42 are inclined toward the inner end of the limit block 4. A side guiding bevel 43 is provided on the outer end of the limit block 4, and the angle between the side guiding bevel 43 and the lower end surface of the limit block 4 is less than 90 degrees. After the adjustment sleeve 1 moves along the axial direction of the connecting rod 3, the side guiding bevel 43 is provided on the limit block 4, which can facilitate the adjustment sleeve 1 to push the limit block 4, so that the limit block 4 can move quickly from the outside to the inside; and the upper guiding bevel 41 and the lower guiding bevel 42 provided on the limit block 4 can facilitate the extraction and insertion of the rotating rod 2 from the inside of the connecting rod 3.

[0025] See also Figure 2 and Figure 3, a guide block 31 is provided in an annular shape at the opposite end of the rotating rod 2 and the connecting rod 3, and the guide block 31 is arranged at intervals with the end face of the rotating rod 2, and the guide block 31 is arranged below the limit block 4. The limit block 4 and the guide block 31 are arranged alternately, and the limit block 4 and the guide block 31 are in contact. A guide groove 21 for the sliding of the guide block 31 is provided in an annular shape on the connecting rod 3 at a position relative to the guide block 31. A step groove 22 is provided above the guide block 31, and the step groove 22 can facilitate the clamping of the limit block 4. The limit block 4 is movably inserted into the step groove 22. The width of the step groove 22 is equal to the thickness of the limit block 4. When the rotating rod 2 and the connecting rod 3 are fitted inside, the limit block 4 corresponds to the inner and outer positions of the step groove 22. After the limit block 4 is clamped into the step groove 22, the axis and radial position of the rotating rod 2 of the hole opener can be limited by the evenly distributed limit blocks 4, which effectively ensures the fixed stability of the hole opener.

[0026] Before the wall hole opener is connected and fixed with the connecting rod 3, first, the adjusting sleeve 1 on the connecting rod 3 is rotated so that the adjusting sleeve 1 moves along the axis of the connecting rod 3 to the side away from the hole opener. At this time, the limit block 4 is free from the restriction of the adjusting sleeve 1; secondly, the guide block 31 on the rotating rod 2 is aligned with the upper and lower positions of the guide groove 21, and the guide block 31 is moved from bottom to top in the guide groove 21, so that the rotating rod 2 on the upper side of the hole drill 23 is inserted into the interior of the connecting rod 3. In this process, the adjacent limit blocks 4 are all moved along the The guide groove 32 moves from the inside to the outside until the rotating rod 2 fits inside the connecting rod 3. At this time, the limit block 4 corresponds to the inside and outside positions of the stepped groove 22; finally, the adjusting sleeve 1 is rotated in the opposite direction to make the adjusting sleeve 1 move toward one side of the hole opener along the axis of the connecting rod 3. After the adjusting sleeve 1 contacts with the limit block 4, the adjacent limit blocks 4 will move inward at the same time due to the restriction of the adjusting sleeve 1, and then be stuck in the stepped groove 22, thereby limiting the downward movement of the rotating rod 2, and further improving the connection efficiency of the hole opener and the electric hammer connecting rod 3.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wall hole opener, comprising a connecting rod (3) fixed to a rotary shaft of an electric hammer and a hole-opening drill bit (23), wherein the hole-opening drill bit (23) is provided with a rotating rod (2) at the end opposite to the connecting rod (3), characterized in that: The rotating rod (2) is inserted into the interior of the connecting rod (3); the outer side of the connecting rod (3) is connected to an adjusting sleeve (1) via a thread; the outer side of the connecting rod (3) is provided with a second guide groove (32) in the form of an annular shape; the second guide groove (32) is communicated with the interior of the connecting rod (3); and a limit block (4) is movably connected inside the second guide groove (32); an upper guide inclined surface (41) and a lower guide inclined surface (42) are respectively provided at the upper and lower sides of the inner end of the limit block (4); a guide block (31) is provided in the form of an annular shape at the opposite end of the rotating rod (2) and the connecting rod (3); and a guide groove (21) for sliding the guide block (31) is provided in the form of an annular shape on the connecting rod (3) at a position relative to the guide block (31).

2. A wall hole opener according to claim 1, characterized in that: The guide block (31) is spaced apart from the end surface of the rotating rod (2), and the guide block (31) is arranged below the limit clamping block (4).

3. A wall hole opener according to claim 1, characterized in that: A stepped groove (22) is provided above the guide block (31), and the limit clamping block (4) is movably inserted into the stepped groove (22).

4. A wall hole opener according to claim 1, characterized in that: The limit block (4) and the guide block (31) are arranged alternately, and the limit block (4) and the guide block (31) are in contact.

5. A wall hole opener according to claim 1, characterized in that: The outer end of the limit clamp block (4) is provided with a side guide inclined surface (43), and the side guide inclined surface (43) forms an angle less than 90 degrees with the lower end surface of the limit clamp block (4).

6. A wall hole opener according to claim 1, characterized in that: The included angle between the upper guiding inclined surface (41) and the lower guiding inclined surface (42) is less than 90 degrees, and both the upper guiding inclined surface (41) and the lower guiding inclined surface (42) are inclined towards the inner end of the limiting block (4).

7. A wall hole opener according to claim 3, characterized in that: The width of the stepped groove (22) is equal to the thickness of the limiting block (4).

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